[PATCH 0/19] desc_struct integration

[PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Hi,

this is a series of patches that unify the struct desc_struct and friends
across x86_64 and i386. As usual, it provides paravirt capabilities as a
side-effect for x86_64.

I consider the main goal, namely, of unifying the desc_struct, an ongoing
effort, being this the beginning. A lot of old code has to be touched to
accomplish that. 

I don't consider this patch ready for inclusion. Basically, the main reason
is that I change the signatures of write_idt_entry(), write_gdt_entry(), and
write_ldt_entry(). This is needed to account for the differences between the
two architectures. (For example, gate descriptors in x86_64 are 16-byte long
and can't be represented by low and high entries). As my patch series were
64-bit only, I hadn't come across the problem before.

I think this interface is sane, but I'd like to hear opinions. Specially
from Jeremy and Zach, since it would touch xen and vmi code. The later, by
the way, is _not_ included in this series. Being the interface acked, we
still have to write it.

Thanks in advance for the review in opinions to come.

[PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
 include/asm-x86/processor_32.h |    5 +----
 6 files changed, 38 insertions(+), 29 deletions(-)

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 8cd9778..b8b9339 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = {{{ 0, 0x00409200 }}};
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 235cd61..0fe1c1d 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,31 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
+	[GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
+	[GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
+	[GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
+	[GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
+	[GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 6724840..9e99cb7 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index e15014e..94c5aea 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 0890040..b3db064 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -11,18 +11,30 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
+#define raw_desc_struct struct { unsigned int a, b; }
+#define detailed_desc_struct                                   \
+  struct {                                                       \
+	u16 limit0;                                             \
+	u16 base0;                                              \
+	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
+	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
+  }
+
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
+	union {
+		raw_desc_struct;
+		detailed_desc_struct;
+	};
 } __attribute__((packed));
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
-
 enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index 0d83da1..f1fc049 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;
-- 
1.4.4.2

[PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
 include/asm-x86/processor_32.h |    5 +----
 6 files changed, 38 insertions(+), 29 deletions(-)

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 8cd9778..b8b9339 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = {{{ 0, 0x00409200 }}};
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 235cd61..0fe1c1d 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,31 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
+	[GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
+	[GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
+	[GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
+	[GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
+	[GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 6724840..9e99cb7 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index e15014e..94c5aea 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 0890040..b3db064 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -11,18 +11,30 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
+#define raw_desc_struct struct { unsigned int a, b; }
+#define detailed_desc_struct                                   \
+  struct {                                                       \
+	u16 limit0;                                             \
+	u16 base0;                                              \
+	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
+	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
+  }
+
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
+	union {
+		raw_desc_struct;
+		detailed_desc_struct;
+	};
 } __attribute__((packed));
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
-
 enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index 0d83da1..f1fc049 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;
-- 
1.4.4.2

[PATCH 2/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index 4153135..afd8446 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 0fe1c1d..a80847f 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -642,7 +642,7 @@ struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index cc19a3e..d16122a 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[DOUBLEFAULT_STACKSIZE];
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index e2be78f..863e892 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 11b935f..c1cfd60 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED;
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 limit)
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
diff --git a/arch/x86/kernel/reboot_32.c b/arch/x86/kernel/reboot_32.c
index bb1a0f8..c3376fa 100644
--- a/arch/x86/kernel/reboot_32.c
+++ b/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index c751e3c..aa0bdd5 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struct desc_struct *dt,
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct Xgt_desc_struct *desc)
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 7b16f2c..53b097a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr, unsigned entries)
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, u32 low, u32 high,
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info *traps)
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 4e04e49..ced4ac1 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *garbage)
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index c547403..bc5ca34 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(void)
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h
index ccd3384..d39f881 100644
--- a/include/asm-x86/lguest.h
+++ b/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index e95c2a6..0333fb6 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *addr, unsigned entries)
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index f1fc049..a8aedb2 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -704,7 +704,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
diff --git a/include/asm-x86/suspend_32.h b/include/asm-x86/suspend_32.h
index a252073..1bbda3a 100644
--- a/include/asm-x86/suspend_32.h
+++ b/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(void) { return 0; }
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;
-- 
1.4.4.2

[PATCH 2/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index 4153135..afd8446 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 0fe1c1d..a80847f 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -642,7 +642,7 @@ struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index cc19a3e..d16122a 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[DOUBLEFAULT_STACKSIZE];
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index e2be78f..863e892 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 11b935f..c1cfd60 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED;
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 limit)
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
diff --git a/arch/x86/kernel/reboot_32.c b/arch/x86/kernel/reboot_32.c
index bb1a0f8..c3376fa 100644
--- a/arch/x86/kernel/reboot_32.c
+++ b/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index c751e3c..aa0bdd5 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struct desc_struct *dt,
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct Xgt_desc_struct *desc)
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 7b16f2c..53b097a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr, unsigned entries)
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, u32 low, u32 high,
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info *traps)
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 4e04e49..ced4ac1 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *garbage)
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index c547403..bc5ca34 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(void)
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h
index ccd3384..d39f881 100644
--- a/include/asm-x86/lguest.h
+++ b/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index e95c2a6..0333fb6 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *addr, unsigned entries)
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index f1fc049..a8aedb2 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -704,7 +704,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
diff --git a/include/asm-x86/suspend_32.h b/include/asm-x86/suspend_32.h
index a252073..1bbda3a 100644
--- a/include/asm-x86/suspend_32.h
+++ b/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(void) { return 0; }
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;
-- 
1.4.4.2

[PATCH 3/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c
index 51297cc..05cafcb 100644
--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c
index c58ca08..54eca46 100644
--- a/arch/x86/kernel/suspend_64.c
+++ b/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index c4c5e76..e5c1118 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(int cpu)
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 230ac6e..1c26dbb 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struct desc_struct *ldt,
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
-- 
1.4.4.2

[PATCH 4/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.4.4.2

[PATCH 4/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.4.4.2

[PATCH 5/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index b3db064..e502549 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -42,7 +42,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -70,6 +70,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.4.4.2

[PATCH 5/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index b3db064..e502549 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -42,7 +42,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -70,6 +70,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.4.4.2

[PATCH 6/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/xen/enlighten.c      |    5 ++---
 include/asm-x86/desc_32.h     |    9 +++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..9ed46da 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 53b097a..829a450 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,7 +411,7 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..e77ed8c 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,14 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +147,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..d369b85 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -24,6 +24,7 @@ struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
+gate_desc;
 
 /* general info */
 struct pv_info {
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.4.4.2

[PATCH 7/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index e502549..3a562d1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -61,7 +61,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -72,8 +72,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.4.4.2

[PATCH 8/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.4.4.2

[PATCH 9/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 7eb0c8a..3e872b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 9e99cb7..8b6d492 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -439,8 +439,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 67a3776..74d2b65 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struct *p, int idx,
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index e77ed8c..3653c9f 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -162,21 +162,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 8fe1b4c..e0aa4bc 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
index 20c5972..5f00d02 100644
--- a/include/asm-x86/ldt.h
+++ b/include/asm-x86/ldt.h
@@ -5,6 +5,7 @@
  */
 #ifndef _ASM_X86_LDT_H
 #define _ASM_X86_LDT_H
+#include <asm/desc_defs.h>
 
 /* Maximum number of LDT entries supported. */
 #define LDT_ENTRIES	8192
@@ -32,6 +33,24 @@ struct user_desc {
 #endif
 };
 
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = info->base_addr & 0x00ff0000;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = info->limit & 0xf0000;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = info->base_addr & 0xff000000;
+}
+
 #define MODIFY_LDT_CONTENTS_DATA	0
 #define MODIFY_LDT_CONTENTS_STACK	1
 #define MODIFY_LDT_CONTENTS_CODE	2
-- 
1.4.4.2

[PATCH 10/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/paravirt_32.c  |    4 ++--
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/xen/enlighten.c       |    5 ++---
 include/asm-x86/desc_32.h      |   29 +++++++++++++++--------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 5 files changed, 29 insertions(+), 25 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 9ed46da..edff853 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,8 +379,8 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_ldt_entry = write_ldt_entry,
+	.write_gdt_entry = write_gdt_entry,
 	.write_idt_entry = write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..a6f9b41 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x80 | 0x2, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 829a450..a552103 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -474,7 +474,7 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				void *desc, int size)
 {
 	preempt_disable();
 
@@ -486,10 +486,9 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 3653c9f..622b0e7 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,11 +28,11 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
@@ -69,7 +69,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, size) \
+				native_write_gdt_entry(dt, entry, desc, size)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -78,11 +79,10 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					   void *desc, int size)
 {
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
+	memcpy(&gdt[entry], desc, size);
 }
 
 static inline void native_set_ldt(const void *addr, unsigned int entries)
@@ -91,12 +91,13 @@ static inline void native_set_ldt(const void *addr, unsigned int entries)
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
 				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -152,11 +153,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
 			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, sizeof(tss));
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index d369b85..a3e22b7 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int size)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, size);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, gate_desc *g)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.4.4.2

[PATCH 10/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/paravirt_32.c  |    4 ++--
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/xen/enlighten.c       |    5 ++---
 include/asm-x86/desc_32.h      |   29 +++++++++++++++--------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 5 files changed, 29 insertions(+), 25 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 9ed46da..edff853 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,8 +379,8 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_ldt_entry = write_ldt_entry,
+	.write_gdt_entry = write_gdt_entry,
 	.write_idt_entry = write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..a6f9b41 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x80 | 0x2, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 829a450..a552103 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -474,7 +474,7 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				void *desc, int size)
 {
 	preempt_disable();
 
@@ -486,10 +486,9 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 3653c9f..622b0e7 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,11 +28,11 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
@@ -69,7 +69,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, size) \
+				native_write_gdt_entry(dt, entry, desc, size)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -78,11 +79,10 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					   void *desc, int size)
 {
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
+	memcpy(&gdt[entry], desc, size);
 }
 
 static inline void native_set_ldt(const void *addr, unsigned int entries)
@@ -91,12 +91,13 @@ static inline void native_set_ldt(const void *addr, unsigned int entries)
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
 				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -152,11 +153,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
 			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, sizeof(tss));
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index d369b85..a3e22b7 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int size)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, size);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, gate_desc *g)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.4.4.2

[PATCH 11/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c      |    3 +--
 arch/x86/xen/enlighten.c   |    4 ++--
 include/asm-x86/desc_32.h  |    9 ++++++++-
 include/asm-x86/desc_64.h  |    7 ++-----
 include/asm-x86/paravirt.h |   10 ++++++----
 5 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a552103..16223b6 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 622b0e7..46fe80a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -68,12 +68,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, size) \
 				native_write_gdt_entry(dt, entry, desc, size)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  void *desc)
+{
+	memcpy(&ldt[entry], desc, size);
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
 {
 	memcpy(&idt[entry], gate, sizeof(*gate));
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index a3e22b7..b855264 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.4.4.2

[PATCH 11/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c      |    3 +--
 arch/x86/xen/enlighten.c   |    4 ++--
 include/asm-x86/desc_32.h  |    9 ++++++++-
 include/asm-x86/desc_64.h  |    7 ++-----
 include/asm-x86/paravirt.h |   10 ++++++----
 5 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a552103..16223b6 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 622b0e7..46fe80a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -68,12 +68,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, size) \
 				native_write_gdt_entry(dt, entry, desc, size)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  void *desc)
+{
+	memcpy(&ldt[entry], desc, size);
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
 {
 	memcpy(&idt[entry], gate, sizeof(*gate));
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index a3e22b7..b855264 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.4.4.2

[PATCH 12/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    7 +++++++
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 46fe80a..5d1e848 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -43,14 +43,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 3a562d1..3bfb7d9 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,6 +58,13 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_LDT =	0x82,	/* present, system, DPL-0, LDT */
+	DESCTYPE_TSS =	0x89,	/* present, system, DPL-0, 32-bit TSS */
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.4.4.2

[PATCH 12/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    7 +++++++
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 46fe80a..5d1e848 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -43,14 +43,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 3a562d1..3bfb7d9 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,6 +58,13 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_LDT =	0x82,	/* present, system, DPL-0, LDT */
+	DESCTYPE_TSS =	0x89,	/* present, system, DPL-0, 32-bit TSS */
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.4.4.2

[PATCH 13/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 6065c50..926d6f8 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -1,5 +1,92 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#include <asm/desc_defs.h>
+
+#ifndef __ASSEMBLY__
+#include <asm/mmu.h>
+
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#ifndef __ASSEMBLY__
+
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0	)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+static inline unsigned long get_desc_base(unsigned long *desc)
+{
+	unsigned long base;
+	base = ((desc[0] >> 16)  & 0x0000ffff) |
+		((desc[1] << 16) & 0x00ff0000) |
+		(desc[1] & 0xff000000);
+	return base;
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 5d1e848..960ec77 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -162,68 +158,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 3cd5f10..2dc19e2 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,22 +134,18 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
-}
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
 
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
@@ -164,42 +156,6 @@ static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
diff --git a/include/asm-x86/mmu_context_64.h b/include/asm-x86/mmu_context_64.h
index 29f95c3..98bfe43 100644
--- a/include/asm-x86/mmu_context_64.h
+++ b/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif
-- 
1.4.4.2

[PATCH 13/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 6065c50..926d6f8 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -1,5 +1,92 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#include <asm/desc_defs.h>
+
+#ifndef __ASSEMBLY__
+#include <asm/mmu.h>
+
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#ifndef __ASSEMBLY__
+
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0	)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+static inline unsigned long get_desc_base(unsigned long *desc)
+{
+	unsigned long base;
+	base = ((desc[0] >> 16)  & 0x0000ffff) |
+		((desc[1] << 16) & 0x00ff0000) |
+		(desc[1] & 0xff000000);
+	return base;
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 5d1e848..960ec77 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -162,68 +158,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 3cd5f10..2dc19e2 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,22 +134,18 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
-}
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
 
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
@@ -164,42 +156,6 @@ static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
diff --git a/include/asm-x86/mmu_context_64.h b/include/asm-x86/mmu_context_64.h
index 29f95c3..98bfe43 100644
--- a/include/asm-x86/mmu_context_64.h
+++ b/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif
-- 
1.4.4.2

[PATCH 14/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 5689a8a..742090f 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -241,7 +242,7 @@ struct thread_struct {
 /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
 	unsigned long	debugctlmsr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.4.4.2

[PATCH 14/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 5689a8a..742090f 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -241,7 +242,7 @@ struct thread_struct {
 /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
 	unsigned long	debugctlmsr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.4.4.2

[PATCH 15/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 74d2b65..98f428b 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struct *p, int idx,
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6056c6d..ef5ab2b 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 926d6f8..3480cb1 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -55,13 +55,9 @@ static inline void load_LDT(mm_context_t *pc)
 	preempt_enable();
 }
 
-static inline unsigned long get_desc_base(unsigned long *desc)
+static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
 
 #else
-- 
1.4.4.2

[PATCH 16/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 3bfb7d9..d4ae70d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -80,9 +80,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.4.4.2

[PATCH 16/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 3bfb7d9..d4ae70d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -80,9 +80,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.4.4.2

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  155 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  120 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++--------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 169 insertions(+), 216 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 3480cb1..1773dd2 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -5,11 +5,166 @@
 
 #ifndef __ASSEMBLY__
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#else
+struct gdt_page
+{
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, size) \
+				native_write_gdt_entry(dt, entry, desc, size)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					   void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					   void *desc, int size)
+{
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d, unsigned long tss,
+					 unsigned type, unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
 #endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm ("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm ("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm ("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+#endif /* __ASSEMBLY__ */
+
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 960ec77..e8f2bc2 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -8,30 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -39,106 +19,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, size) \
-				native_write_gdt_entry(dt, entry, desc, size)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  void *desc)
-{
-	memcpy(&ldt[entry], desc, size);
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					   void *desc, int size)
-{
-	memcpy(&gdt[entry], desc, size);
-}
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, sizeof(ldt));
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 7fd9876..fd907da 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
 }
 
 #endif /* !__ASSEMBLY__ */
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index d4ae70d..69597f3 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -51,9 +51,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
-- 
1.4.4.2

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   43 ---------------------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 126 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 6b03d88..776e19b 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 1773dd2..1290757 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -15,6 +15,22 @@ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page
 {
@@ -26,6 +42,16 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate,unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  ((( 0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -214,6 +240,68 @@ static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
deleted file mode 100644
index e8f2bc2..0000000
--- a/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, sizeof(tss));
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index fd907da..de37b9b 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 69597f3..7759d8a 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,6 +39,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -60,10 +61,6 @@ enum {
 	DESC_LDT = 0x2,
 	DESCTYPE_LDT =	0x82,	/* present, system, DPL-0, LDT */
 	DESCTYPE_TSS =	0x89,	/* present, system, DPL-0, 32-bit TSS */
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };
 
-- 
1.4.4.2

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 2 files changed, 33 insertions(+), 41 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 1290757..4aab1fd 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -133,6 +133,39 @@ static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, sizeof(tss));
+}
+
+#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -191,13 +224,6 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 #endif /* __ASSEMBLY__ */
 
-
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #ifndef __ASSEMBLY__
 
 #define _LDT_empty(info) (\
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
deleted file mode 100644
index de37b9b..0000000
--- a/include/asm-x86/desc_64.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
-- 
1.4.4.2

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 2 files changed, 33 insertions(+), 41 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 1290757..4aab1fd 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -133,6 +133,39 @@ static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, sizeof(tss));
+}
+
+#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -191,13 +224,6 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 #endif /* __ASSEMBLY__ */
 
-
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #ifndef __ASSEMBLY__
 
 #define _LDT_empty(info) (\
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
deleted file mode 100644
index de37b9b..0000000
--- a/include/asm-x86/desc_64.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
-- 
1.4.4.2

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   43 ---------------------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 126 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 6b03d88..776e19b 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 1773dd2..1290757 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -15,6 +15,22 @@ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page
 {
@@ -26,6 +42,16 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate,unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  ((( 0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -214,6 +240,68 @@ static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
deleted file mode 100644
index e8f2bc2..0000000
--- a/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, sizeof(tss));
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index fd907da..de37b9b 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 69597f3..7759d8a 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,6 +39,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -60,10 +61,6 @@ enum {
 	DESC_LDT = 0x2,
 	DESCTYPE_LDT =	0x82,	/* present, system, DPL-0, LDT */
 	DESCTYPE_TSS =	0x89,	/* present, system, DPL-0, 32-bit TSS */
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };
 
-- 
1.4.4.2

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  155 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  120 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++--------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 169 insertions(+), 216 deletions(-)

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 3480cb1..1773dd2 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -5,11 +5,166 @@
 
 #ifndef __ASSEMBLY__
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#else
+struct gdt_page
+{
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, size) \
+				native_write_gdt_entry(dt, entry, desc, size)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					   void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					   void *desc, int size)
+{
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d, unsigned long tss,
+					 unsigned type, unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
 #endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm ("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm ("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm ("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+#endif /* __ASSEMBLY__ */
+
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 960ec77..e8f2bc2 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -8,30 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -39,106 +19,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, size) \
-				native_write_gdt_entry(dt, entry, desc, size)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  void *desc)
-{
-	memcpy(&ldt[entry], desc, size);
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					   void *desc, int size)
-{
-	memcpy(&gdt[entry], desc, size);
-}
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, sizeof(ldt));
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 7fd9876..fd907da 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
 }
 
 #endif /* !__ASSEMBLY__ */
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index d4ae70d..69597f3 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -51,9 +51,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
-- 
1.4.4.2

[PATCH 15/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 74d2b65..98f428b 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struct *p, int idx,
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6056c6d..ef5ab2b 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 926d6f8..3480cb1 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -55,13 +55,9 @@ static inline void load_LDT(mm_context_t *pc)
 	preempt_enable();
 }
 
-static inline unsigned long get_desc_base(unsigned long *desc)
+static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
 
 #else
-- 
1.4.4.2

[PATCH 9/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 7eb0c8a..3e872b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 9e99cb7..8b6d492 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -439,8 +439,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 67a3776..74d2b65 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struct *p, int idx,
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index e77ed8c..3653c9f 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -162,21 +162,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 8fe1b4c..e0aa4bc 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
index 20c5972..5f00d02 100644
--- a/include/asm-x86/ldt.h
+++ b/include/asm-x86/ldt.h
@@ -5,6 +5,7 @@
  */
 #ifndef _ASM_X86_LDT_H
 #define _ASM_X86_LDT_H
+#include <asm/desc_defs.h>
 
 /* Maximum number of LDT entries supported. */
 #define LDT_ENTRIES	8192
@@ -32,6 +33,24 @@ struct user_desc {
 #endif
 };
 
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = info->base_addr & 0x00ff0000;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = info->limit & 0xf0000;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = info->base_addr & 0xff000000;
+}
+
 #define MODIFY_LDT_CONTENTS_DATA	0
 #define MODIFY_LDT_CONTENTS_STACK	1
 #define MODIFY_LDT_CONTENTS_CODE	2
-- 
1.4.4.2

[PATCH 8/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.4.4.2

[PATCH 7/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index e502549..3a562d1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -61,7 +61,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -72,8 +72,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.4.4.2

[PATCH 6/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/xen/enlighten.c      |    5 ++---
 include/asm-x86/desc_32.h     |    9 +++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..9ed46da 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 53b097a..829a450 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,7 +411,7 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..e77ed8c 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,14 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +147,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..d369b85 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -24,6 +24,7 @@ struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
+gate_desc;
 
 /* general info */
 struct pv_info {
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.4.4.2

[PATCH 3/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c
index 51297cc..05cafcb 100644
--- a/arch/x86/kernel/setup64.c
+++ b/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c
index c58ca08..54eca46 100644
--- a/arch/x86/kernel/suspend_64.c
+++ b/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index c4c5e76..e5c1118 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(int cpu)
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 230ac6e..1c26dbb 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struct desc_struct *ldt,
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned cpu, void *addr)
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
-- 
1.4.4.2

Re: [PATCH 1/19] unify desc_struct

[Jeremy Fitzhardinge]

Glauber de Oliveira Costa wrote:
> This patch aims to make the access of struct desc_struct variables
> equal across architectures. In this patch, I unify the i386 and x86_64
> versions under an anonymous union, keeping the way they are accessed
> untouched (a and b for 32-bit code, individual bit-fields for 64-bit).
>
> This solution is not beautiful, but will allow us to integrate common
> code that differed by the way descriptors were used. This is to be viewed
> incrementally. There's simply too much code to be fixed at once.
>
> In the future, goal is to set up in a single way of acessing
> the desc_struct fields.
>
> Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
> ---
>  arch/x86/kernel/apm_32.c       |    2 +-
>  arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
>  arch/x86/kernel/process_64.c   |    2 +-
>  arch/x86/kernel/traps_32.c     |    2 +-
>  include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
>  include/asm-x86/processor_32.h |    5 +----
>  6 files changed, 38 insertions(+), 29 deletions(-)
>
> diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
> index 8cd9778..b8b9339 100644
> --- a/arch/x86/kernel/apm_32.c
> +++ b/arch/x86/kernel/apm_32.c
> @@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
>  static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
>  static struct apm_user *	user_list;
>  static DEFINE_SPINLOCK(user_list_lock);
> -static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
> +static const struct desc_struct	bad_bios_desc = {{{ 0, 0x00409200 }}};
>  
>  static const char		driver_version[] = "1.16ac";	/* no spaces */
>  
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index 235cd61..0fe1c1d 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -22,31 +22,31 @@
>  #include "cpu.h"
>  
>  DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
> -	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
> -	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
> -	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
> -	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
> +	[GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
> +	[GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
> +	[GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
> +	[GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
>   

I don't suppose there's some way to make all this more symbolic?

>  	/*
>  	 * Segments used for calling PnP BIOS have byte granularity.
>  	 * They code segments and data segments have fixed 64k limits,
>  	 * the transfer segment sizes are set at run time.
>  	 */
> -	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> -	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
> -	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
> -	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
> -	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> +	[GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
> +	[GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
>  	/*
>  	 * The APM segments have byte granularity and their bases
>  	 * are set at run time.  All have 64k limits.
>  	 */
> -	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> +	[GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
>  	/* 16-bit code */
> -	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
> -	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
> +	[GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
> +	[GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
>  
> -	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
> -	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
> +	[GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
> +	[GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
>  } };
>  EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
>  
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index 6724840..9e99cb7 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
>  		.limit_in_pages = 1,
>  		.useable = 1,
>  	};
> -	struct n_desc_struct *desc = (void *)t->thread.tls_array;
> +	struct desc_struct *desc = (void *)t->thread.tls_array;
>  	desc += tls;
>  	desc->a = LDT_entry_a(&ud);
>  	desc->b = LDT_entry_b(&ud);
> diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
> index e15014e..94c5aea 100644
> --- a/arch/x86/kernel/traps_32.c
> +++ b/arch/x86/kernel/traps_32.c
> @@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
>   * F0 0F bug workaround.. We have a special link segment
>   * for this.
>   */
> -struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
> +struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
>  
>  asmlinkage void divide_error(void);
>  asmlinkage void debug(void);
> diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
> index 0890040..b3db064 100644
> --- a/include/asm-x86/desc_defs.h
> +++ b/include/asm-x86/desc_defs.h
> @@ -11,18 +11,30 @@
>  
>  #include <linux/types.h>
>  
> +/*
> + * FIXME: Acessing the desc_struct through its fields is more elegant,
> + * and should be the one valid thing to do. However, a lot of open code
> + * still touches the a and b acessors, and doing this allow us to do it
> + * incrementally. We keep the signature as a struct, rather than an union,
> + * so we can get rid of it transparently in the future -- glommer
> + */
> +#define raw_desc_struct struct { unsigned int a, b; }
> +#define detailed_desc_struct                                   \
> +  struct {                                                       \
> +	u16 limit0;                                             \
> +	u16 base0;                                              \
> +	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> +	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> +  }
> +
>  // 8 byte segment descriptor
>  struct desc_struct {
> -	u16 limit0;
> -	u16 base0;
> -	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
> -	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
> +	union {
> +		raw_desc_struct;
> +		detailed_desc_struct;
> +	};
>  } __attribute__((packed));
>   

Is it really necessary to use #defines?  Couldn't you just define the
structures inline, or give them names?

    J

Re: [PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

On Dec 6, 2007 5:24 PM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>
> Glauber de Oliveira Costa wrote:
> > This patch aims to make the access of struct desc_struct variables
> > equal across architectures. In this patch, I unify the i386 and x86_64
> > versions under an anonymous union, keeping the way they are accessed
> > untouched (a and b for 32-bit code, individual bit-fields for 64-bit).
> >
> > This solution is not beautiful, but will allow us to integrate common
> > code that differed by the way descriptors were used. This is to be viewed
> > incrementally. There's simply too much code to be fixed at once.
> >
> > In the future, goal is to set up in a single way of acessing
> > the desc_struct fields.
> >
> > Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
> > ---
> >  arch/x86/kernel/apm_32.c       |    2 +-
> >  arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
> >  arch/x86/kernel/process_64.c   |    2 +-
> >  arch/x86/kernel/traps_32.c     |    2 +-
> >  include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
> >  include/asm-x86/processor_32.h |    5 +----
> >  6 files changed, 38 insertions(+), 29 deletions(-)
> >
> > diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
> > index 8cd9778..b8b9339 100644
> > --- a/arch/x86/kernel/apm_32.c
> > +++ b/arch/x86/kernel/apm_32.c
> > @@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
> >  static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
> >  static struct apm_user *     user_list;
> >  static DEFINE_SPINLOCK(user_list_lock);
> > -static const struct desc_struct      bad_bios_desc = { 0, 0x00409200 };
> > +static const struct desc_struct      bad_bios_desc = {{{ 0, 0x00409200 }}};
> >
> >  static const char            driver_version[] = "1.16ac";    /* no spaces */
> >
> > diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> > index 235cd61..0fe1c1d 100644
> > --- a/arch/x86/kernel/cpu/common.c
> > +++ b/arch/x86/kernel/cpu/common.c
> > @@ -22,31 +22,31 @@
> >  #include "cpu.h"
> >
> >  DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
> > -     [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
> > -     [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
> > -     [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
> > -     [GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
> > +     [GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
> > +     [GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
> > +     [GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
> > +     [GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
> >
>
> I don't suppose there's some way to make all this more symbolic?

There may be, but it's not the problem I'm trying to address in this
series. It's probably not too hard
to come up with a macro that receives the relevant parts of the
descriptors and create the initializers.

but it's deferred work.

>
>
> >       /*
> >        * Segments used for calling PnP BIOS have byte granularity.
> >        * They code segments and data segments have fixed 64k limits,
> >        * the transfer segment sizes are set at run time.
> >        */
> > -     [GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> > -     [GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
> > -     [GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
> > -     [GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
> > -     [GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> > +     [GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
> > +     [GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> >       /*
> >        * The APM segments have byte granularity and their bases
> >        * are set at run time.  All have 64k limits.
> >        */
> > -     [GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> > +     [GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> >       /* 16-bit code */
> > -     [GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
> > -     [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
> > +     [GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
> > +     [GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
> >
> > -     [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
> > -     [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
> > +     [GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
> > +     [GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
> >  } };
> >  EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
> >
> > diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> > index 6724840..9e99cb7 100644
> > --- a/arch/x86/kernel/process_64.c
> > +++ b/arch/x86/kernel/process_64.c
> > @@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
> >               .limit_in_pages = 1,
> >               .useable = 1,
> >       };
> > -     struct n_desc_struct *desc = (void *)t->thread.tls_array;
> > +     struct desc_struct *desc = (void *)t->thread.tls_array;
> >       desc += tls;
> >       desc->a = LDT_entry_a(&ud);
> >       desc->b = LDT_entry_b(&ud);
> > diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
> > index e15014e..94c5aea 100644
> > --- a/arch/x86/kernel/traps_32.c
> > +++ b/arch/x86/kernel/traps_32.c
> > @@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
> >   * F0 0F bug workaround.. We have a special link segment
> >   * for this.
> >   */
> > -struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
> > +struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
> >
> >  asmlinkage void divide_error(void);
> >  asmlinkage void debug(void);
> > diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
> > index 0890040..b3db064 100644
> > --- a/include/asm-x86/desc_defs.h
> > +++ b/include/asm-x86/desc_defs.h
> > @@ -11,18 +11,30 @@
> >
> >  #include <linux/types.h>
> >
> > +/*
> > + * FIXME: Acessing the desc_struct through its fields is more elegant,
> > + * and should be the one valid thing to do. However, a lot of open code
> > + * still touches the a and b acessors, and doing this allow us to do it
> > + * incrementally. We keep the signature as a struct, rather than an union,
> > + * so we can get rid of it transparently in the future -- glommer
> > + */
> > +#define raw_desc_struct struct { unsigned int a, b; }
> > +#define detailed_desc_struct                                   \
> > +  struct {                                                       \
> > +     u16 limit0;                                             \
> > +     u16 base0;                                              \
> > +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> > +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> > +  }
> > +
> >  // 8 byte segment descriptor
> >  struct desc_struct {
> > -     u16 limit0;
> > -     u16 base0;
> > -     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
> > -     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
> > +     union {
> > +             raw_desc_struct;
> > +             detailed_desc_struct;
> > +     };
> >  } __attribute__((packed));
> >
>
> Is it really necessary to use #defines?  Couldn't you just define the
> structures inline, or give them names?

No, it's not necessary. It's just the less ugly way I found.
As I intend to switch all uses to the field accesses, instead of a and
b, I don't think it's a big deal. When it's done, the struct will be
clean and simple, with no need for
these defines.



-- 
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

Re: [PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

On Dec 6, 2007 5:24 PM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>
> Glauber de Oliveira Costa wrote:
> > This patch aims to make the access of struct desc_struct variables
> > equal across architectures. In this patch, I unify the i386 and x86_64
> > versions under an anonymous union, keeping the way they are accessed
> > untouched (a and b for 32-bit code, individual bit-fields for 64-bit).
> >
> > This solution is not beautiful, but will allow us to integrate common
> > code that differed by the way descriptors were used. This is to be viewed
> > incrementally. There's simply too much code to be fixed at once.
> >
> > In the future, goal is to set up in a single way of acessing
> > the desc_struct fields.
> >
> > Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
> > ---
> >  arch/x86/kernel/apm_32.c       |    2 +-
> >  arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
> >  arch/x86/kernel/process_64.c   |    2 +-
> >  arch/x86/kernel/traps_32.c     |    2 +-
> >  include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
> >  include/asm-x86/processor_32.h |    5 +----
> >  6 files changed, 38 insertions(+), 29 deletions(-)
> >
> > diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
> > index 8cd9778..b8b9339 100644
> > --- a/arch/x86/kernel/apm_32.c
> > +++ b/arch/x86/kernel/apm_32.c
> > @@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
> >  static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
> >  static struct apm_user *     user_list;
> >  static DEFINE_SPINLOCK(user_list_lock);
> > -static const struct desc_struct      bad_bios_desc = { 0, 0x00409200 };
> > +static const struct desc_struct      bad_bios_desc = {{{ 0, 0x00409200 }}};
> >
> >  static const char            driver_version[] = "1.16ac";    /* no spaces */
> >
> > diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> > index 235cd61..0fe1c1d 100644
> > --- a/arch/x86/kernel/cpu/common.c
> > +++ b/arch/x86/kernel/cpu/common.c
> > @@ -22,31 +22,31 @@
> >  #include "cpu.h"
> >
> >  DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
> > -     [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
> > -     [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
> > -     [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
> > -     [GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
> > +     [GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
> > +     [GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
> > +     [GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
> > +     [GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
> >
>
> I don't suppose there's some way to make all this more symbolic?

There may be, but it's not the problem I'm trying to address in this
series. It's probably not too hard
to come up with a macro that receives the relevant parts of the
descriptors and create the initializers.

but it's deferred work.

>
>
> >       /*
> >        * Segments used for calling PnP BIOS have byte granularity.
> >        * They code segments and data segments have fixed 64k limits,
> >        * the transfer segment sizes are set at run time.
> >        */
> > -     [GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> > -     [GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
> > -     [GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
> > -     [GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
> > -     [GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> > +     [GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
> > +     [GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> > +     [GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> >       /*
> >        * The APM segments have byte granularity and their bases
> >        * are set at run time.  All have 64k limits.
> >        */
> > -     [GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> > +     [GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> >       /* 16-bit code */
> > -     [GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
> > -     [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
> > +     [GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
> > +     [GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
> >
> > -     [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
> > -     [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
> > +     [GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
> > +     [GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
> >  } };
> >  EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
> >
> > diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> > index 6724840..9e99cb7 100644
> > --- a/arch/x86/kernel/process_64.c
> > +++ b/arch/x86/kernel/process_64.c
> > @@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
> >               .limit_in_pages = 1,
> >               .useable = 1,
> >       };
> > -     struct n_desc_struct *desc = (void *)t->thread.tls_array;
> > +     struct desc_struct *desc = (void *)t->thread.tls_array;
> >       desc += tls;
> >       desc->a = LDT_entry_a(&ud);
> >       desc->b = LDT_entry_b(&ud);
> > diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
> > index e15014e..94c5aea 100644
> > --- a/arch/x86/kernel/traps_32.c
> > +++ b/arch/x86/kernel/traps_32.c
> > @@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
> >   * F0 0F bug workaround.. We have a special link segment
> >   * for this.
> >   */
> > -struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
> > +struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
> >
> >  asmlinkage void divide_error(void);
> >  asmlinkage void debug(void);
> > diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
> > index 0890040..b3db064 100644
> > --- a/include/asm-x86/desc_defs.h
> > +++ b/include/asm-x86/desc_defs.h
> > @@ -11,18 +11,30 @@
> >
> >  #include <linux/types.h>
> >
> > +/*
> > + * FIXME: Acessing the desc_struct through its fields is more elegant,
> > + * and should be the one valid thing to do. However, a lot of open code
> > + * still touches the a and b acessors, and doing this allow us to do it
> > + * incrementally. We keep the signature as a struct, rather than an union,
> > + * so we can get rid of it transparently in the future -- glommer
> > + */
> > +#define raw_desc_struct struct { unsigned int a, b; }
> > +#define detailed_desc_struct                                   \
> > +  struct {                                                       \
> > +     u16 limit0;                                             \
> > +     u16 base0;                                              \
> > +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> > +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> > +  }
> > +
> >  // 8 byte segment descriptor
> >  struct desc_struct {
> > -     u16 limit0;
> > -     u16 base0;
> > -     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
> > -     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
> > +     union {
> > +             raw_desc_struct;
> > +             detailed_desc_struct;
> > +     };
> >  } __attribute__((packed));
> >
>
> Is it really necessary to use #defines?  Couldn't you just define the
> structures inline, or give them names?

No, it's not necessary. It's just the less ugly way I found.
As I intend to switch all uses to the field accesses, instead of a and
b, I don't think it's a big deal. When it's done, the struct will be
clean and simple, with no need for
these defines.



-- 
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

Re: [PATCH 1/19] unify desc_struct

[Jeremy Fitzhardinge]

Glauber de Oliveira Costa wrote:
> This patch aims to make the access of struct desc_struct variables
> equal across architectures. In this patch, I unify the i386 and x86_64
> versions under an anonymous union, keeping the way they are accessed
> untouched (a and b for 32-bit code, individual bit-fields for 64-bit).
>
> This solution is not beautiful, but will allow us to integrate common
> code that differed by the way descriptors were used. This is to be viewed
> incrementally. There's simply too much code to be fixed at once.
>
> In the future, goal is to set up in a single way of acessing
> the desc_struct fields.
>
> Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
> ---
>  arch/x86/kernel/apm_32.c       |    2 +-
>  arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
>  arch/x86/kernel/process_64.c   |    2 +-
>  arch/x86/kernel/traps_32.c     |    2 +-
>  include/asm-x86/desc_defs.h    |   28 ++++++++++++++++++++--------
>  include/asm-x86/processor_32.h |    5 +----
>  6 files changed, 38 insertions(+), 29 deletions(-)
>
> diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
> index 8cd9778..b8b9339 100644
> --- a/arch/x86/kernel/apm_32.c
> +++ b/arch/x86/kernel/apm_32.c
> @@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
>  static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
>  static struct apm_user *	user_list;
>  static DEFINE_SPINLOCK(user_list_lock);
> -static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
> +static const struct desc_struct	bad_bios_desc = {{{ 0, 0x00409200 }}};
>  
>  static const char		driver_version[] = "1.16ac";	/* no spaces */
>  
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index 235cd61..0fe1c1d 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -22,31 +22,31 @@
>  #include "cpu.h"
>  
>  DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
> -	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
> -	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
> -	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
> -	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
> +	[GDT_ENTRY_KERNEL_CS] = {{{ 0x0000ffff, 0x00cf9a00 }}},
> +	[GDT_ENTRY_KERNEL_DS] = {{{ 0x0000ffff, 0x00cf9200 }}},
> +	[GDT_ENTRY_DEFAULT_USER_CS] = {{{ 0x0000ffff, 0x00cffa00 }}},
> +	[GDT_ENTRY_DEFAULT_USER_DS] = {{{ 0x0000ffff, 0x00cff200 }}},
>   

I don't suppose there's some way to make all this more symbolic?

>  	/*
>  	 * Segments used for calling PnP BIOS have byte granularity.
>  	 * They code segments and data segments have fixed 64k limits,
>  	 * the transfer segment sizes are set at run time.
>  	 */
> -	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> -	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
> -	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
> -	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
> -	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_CS32] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
> +	[GDT_ENTRY_PNPBIOS_CS16] = {{{ 0x0000ffff, 0x00009a00 }}},/* 16-bit code */
> +	[GDT_ENTRY_PNPBIOS_DS] = {{{ 0x0000ffff, 0x00009200 }}}, /* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_TS1] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
> +	[GDT_ENTRY_PNPBIOS_TS2] = {{{ 0x00000000, 0x00009200 }}},/* 16-bit data */
>  	/*
>  	 * The APM segments have byte granularity and their bases
>  	 * are set at run time.  All have 64k limits.
>  	 */
> -	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
> +	[GDT_ENTRY_APMBIOS_BASE] = {{{ 0x0000ffff, 0x00409a00 }}},/* 32-bit code */
>  	/* 16-bit code */
> -	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
> -	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
> +	[GDT_ENTRY_APMBIOS_BASE+1] = {{{ 0x0000ffff, 0x00009a00 }}},
> +	[GDT_ENTRY_APMBIOS_BASE+2] = {{{ 0x0000ffff, 0x00409200 }}}, /* data */
>  
> -	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
> -	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
> +	[GDT_ENTRY_ESPFIX_SS] = {{{ 0x00000000, 0x00c09200 }}},
> +	[GDT_ENTRY_PERCPU] = {{{ 0x00000000, 0x00000000 }}},
>  } };
>  EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
>  
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index 6724840..9e99cb7 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -437,7 +437,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
>  		.limit_in_pages = 1,
>  		.useable = 1,
>  	};
> -	struct n_desc_struct *desc = (void *)t->thread.tls_array;
> +	struct desc_struct *desc = (void *)t->thread.tls_array;
>  	desc += tls;
>  	desc->a = LDT_entry_a(&ud);
>  	desc->b = LDT_entry_b(&ud);
> diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
> index e15014e..94c5aea 100644
> --- a/arch/x86/kernel/traps_32.c
> +++ b/arch/x86/kernel/traps_32.c
> @@ -76,7 +76,7 @@ char ignore_fpu_irq = 0;
>   * F0 0F bug workaround.. We have a special link segment
>   * for this.
>   */
> -struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
> +struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {{{ 0, 0 }}}, };
>  
>  asmlinkage void divide_error(void);
>  asmlinkage void debug(void);
> diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
> index 0890040..b3db064 100644
> --- a/include/asm-x86/desc_defs.h
> +++ b/include/asm-x86/desc_defs.h
> @@ -11,18 +11,30 @@
>  
>  #include <linux/types.h>
>  
> +/*
> + * FIXME: Acessing the desc_struct through its fields is more elegant,
> + * and should be the one valid thing to do. However, a lot of open code
> + * still touches the a and b acessors, and doing this allow us to do it
> + * incrementally. We keep the signature as a struct, rather than an union,
> + * so we can get rid of it transparently in the future -- glommer
> + */
> +#define raw_desc_struct struct { unsigned int a, b; }
> +#define detailed_desc_struct                                   \
> +  struct {                                                       \
> +	u16 limit0;                                             \
> +	u16 base0;                                              \
> +	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> +	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> +  }
> +
>  // 8 byte segment descriptor
>  struct desc_struct {
> -	u16 limit0;
> -	u16 base0;
> -	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
> -	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
> +	union {
> +		raw_desc_struct;
> +		detailed_desc_struct;
> +	};
>  } __attribute__((packed));
>   

Is it really necessary to use #defines?  Couldn't you just define the
structures inline, or give them names?

    J

Re: [PATCH 1/19] unify desc_struct

[Andi Kleen]

> +/*
> + * FIXME: Acessing the desc_struct through its fields is more elegant,
> + * and should be the one valid thing to do. However, a lot of open code
> + * still touches the a and b acessors, and doing this allow us to do it
> + * incrementally. We keep the signature as a struct, rather than an union,
> + * so we can get rid of it transparently in the future -- glommer
> + */
> +#define raw_desc_struct struct { unsigned int a, b; }
> +#define detailed_desc_struct                                   \
> +  struct {                                                       \
> +	u16 limit0;                                             \
> +	u16 base0;                                              \
> +	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> +	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> +  }

The standard clean way to do this is with a anonymous union.

-Andi

Re: [PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

On Dec 6, 2007 6:54 PM, Andi Kleen <ak@suse.de> wrote:
>
> > +/*
> > + * FIXME: Acessing the desc_struct through its fields is more elegant,
> > + * and should be the one valid thing to do. However, a lot of open code
> > + * still touches the a and b acessors, and doing this allow us to do it
> > + * incrementally. We keep the signature as a struct, rather than an union,
> > + * so we can get rid of it transparently in the future -- glommer
> > + */
> > +#define raw_desc_struct struct { unsigned int a, b; }
> > +#define detailed_desc_struct                                   \
> > +  struct {                                                       \
> > +     u16 limit0;                                             \
> > +     u16 base0;                                              \
> > +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> > +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> > +  }
>
> The standard clean way to do this is with a anonymous union.
It is an anonymous union.

However:

* It's an union of structs
* I wished to keep the toplevel type as a struct
The alternative would be to write:

struct desc_struct {
union {
    struct { unsigned int a, b; };
    struct {
               u16 limit0;
               u16 base0;
               unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
               unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
    };
};
};

Which is fine, it's all the same in the end. Just with more shift
rights, and more visual pollution.


-- 
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

Re: [PATCH 1/19] unify desc_struct

[Jeremy Fitzhardinge]

Glauber de Oliveira Costa wrote:
> On Dec 6, 2007 6:54 PM, Andi Kleen <ak@suse.de> wrote:
>   
>>> +/*
>>> + * FIXME: Acessing the desc_struct through its fields is more elegant,
>>> + * and should be the one valid thing to do. However, a lot of open code
>>> + * still touches the a and b acessors, and doing this allow us to do it
>>> + * incrementally. We keep the signature as a struct, rather than an union,
>>> + * so we can get rid of it transparently in the future -- glommer
>>> + */
>>> +#define raw_desc_struct struct { unsigned int a, b; }
>>> +#define detailed_desc_struct                                   \
>>> +  struct {                                                       \
>>> +     u16 limit0;                                             \
>>> +     u16 base0;                                              \
>>> +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
>>> +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
>>> +  }
>>>       
>> The standard clean way to do this is with a anonymous union.
>>     
> It is an anonymous union.
>
> However:
>
> * It's an union of structs
> * I wished to keep the toplevel type as a struct
> The alternative would be to write:
>
> struct desc_struct {
> union {
>     struct { unsigned int a, b; };
>     struct {
>                u16 limit0;
>                u16 base0;
>                unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
>                unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
>     };
> };
> };
>
> Which is fine, it's all the same in the end. Just with more shift
> rights, and more visual pollution.
>   

No, that's much clearer.  It's a pity that the anonymous struct/union
syntax isn't general enough to allow:

struct desc_packed {
               u16 limit0;
               u16 base0;
               unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
               unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
};

struct desc {
	struct desc_packed;
};

    J

Re: [PATCH 1/19] unify desc_struct

[Jeremy Fitzhardinge]

Glauber de Oliveira Costa wrote:
> On Dec 6, 2007 6:54 PM, Andi Kleen <ak@suse.de> wrote:
>   
>>> +/*
>>> + * FIXME: Acessing the desc_struct through its fields is more elegant,
>>> + * and should be the one valid thing to do. However, a lot of open code
>>> + * still touches the a and b acessors, and doing this allow us to do it
>>> + * incrementally. We keep the signature as a struct, rather than an union,
>>> + * so we can get rid of it transparently in the future -- glommer
>>> + */
>>> +#define raw_desc_struct struct { unsigned int a, b; }
>>> +#define detailed_desc_struct                                   \
>>> +  struct {                                                       \
>>> +     u16 limit0;                                             \
>>> +     u16 base0;                                              \
>>> +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
>>> +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
>>> +  }
>>>       
>> The standard clean way to do this is with a anonymous union.
>>     
> It is an anonymous union.
>
> However:
>
> * It's an union of structs
> * I wished to keep the toplevel type as a struct
> The alternative would be to write:
>
> struct desc_struct {
> union {
>     struct { unsigned int a, b; };
>     struct {
>                u16 limit0;
>                u16 base0;
>                unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
>                unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
>     };
> };
> };
>
> Which is fine, it's all the same in the end. Just with more shift
> rights, and more visual pollution.
>   

No, that's much clearer.  It's a pity that the anonymous struct/union
syntax isn't general enough to allow:

struct desc_packed {
               u16 limit0;
               u16 base0;
               unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
               unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
};

struct desc {
	struct desc_packed;
};

    J

Re: [PATCH 1/19] unify desc_struct

[Glauber de Oliveira Costa]

On Dec 6, 2007 6:54 PM, Andi Kleen <ak@suse.de> wrote:
>
> > +/*
> > + * FIXME: Acessing the desc_struct through its fields is more elegant,
> > + * and should be the one valid thing to do. However, a lot of open code
> > + * still touches the a and b acessors, and doing this allow us to do it
> > + * incrementally. We keep the signature as a struct, rather than an union,
> > + * so we can get rid of it transparently in the future -- glommer
> > + */
> > +#define raw_desc_struct struct { unsigned int a, b; }
> > +#define detailed_desc_struct                                   \
> > +  struct {                                                       \
> > +     u16 limit0;                                             \
> > +     u16 base0;                                              \
> > +     unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> > +     unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> > +  }
>
> The standard clean way to do this is with a anonymous union.
It is an anonymous union.

However:

* It's an union of structs
* I wished to keep the toplevel type as a struct
The alternative would be to write:

struct desc_struct {
union {
    struct { unsigned int a, b; };
    struct {
               u16 limit0;
               u16 base0;
               unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
               unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;
    };
};
};

Which is fine, it's all the same in the end. Just with more shift
rights, and more visual pollution.


-- 
Glauber de Oliveira Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."

Re: [PATCH 1/19] unify desc_struct

[Andi Kleen]

> +/*
> + * FIXME: Acessing the desc_struct through its fields is more elegant,
> + * and should be the one valid thing to do. However, a lot of open code
> + * still touches the a and b acessors, and doing this allow us to do it
> + * incrementally. We keep the signature as a struct, rather than an union,
> + * so we can get rid of it transparently in the future -- glommer
> + */
> +#define raw_desc_struct struct { unsigned int a, b; }
> +#define detailed_desc_struct                                   \
> +  struct {                                                       \
> +	u16 limit0;                                             \
> +	u16 base0;                                              \
> +	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;    \
> +	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 :8;\
> +  }

The standard clean way to do this is with a anonymous union.

-Andi

[PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Since the last version of it received no comments on the interfaces, here
it goes a version, that I feel ready for inclusion.

The comments regarding style, specially the elimination of the #defines in
the desc_struct definition were merged. I also implemented the vmi
functions,
missing last time.

Ingo, in the absense of further complaints, could you please push to the
x86 tree?

[PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Since the last version of it received no comments on the interfaces, here
it goes a version, that I feel ready for inclusion.

The comments regarding style, specially the elimination of the #defines in
the desc_struct definition were merged. I also implemented the vmi
functions,
missing last time.

Ingo, in the absense of further complaints, could you please push to the
x86 tree?

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 7eb0c8a..3e872b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e09d9f1..abf32e3 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 67a3776..74d2b65 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struct *p, int idx,
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 54b2314..0370099 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 8fe1b4c..e0aa4bc 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
index 20c5972..49013fd 100644
--- a/include/asm-x86/ldt.h
+++ b/include/asm-x86/ldt.h
@@ -5,6 +5,7 @@
  */
 #ifndef _ASM_X86_LDT_H
 #define _ASM_X86_LDT_H
+#include <asm/desc_defs.h>
 
 /* Maximum number of LDT entries supported. */
 #define LDT_ENTRIES	8192
@@ -32,6 +33,24 @@ struct user_desc {
 #endif
 };
 
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
 #define MODIFY_LDT_CONTENTS_DATA	0
 #define MODIFY_LDT_CONTENTS_STACK	1
 #define MODIFY_LDT_CONTENTS_CODE	2
-- 
1.5.0.6

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 7eb0c8a..3e872b4 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e09d9f1..abf32e3 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 67a3776..74d2b65 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struct *p, int idx,
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 54b2314..0370099 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const vo
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 8fe1b4c..e0aa4bc 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
index 20c5972..49013fd 100644
--- a/include/asm-x86/ldt.h
+++ b/include/asm-x86/ldt.h
@@ -5,6 +5,7 @@
  */
 #ifndef _ASM_X86_LDT_H
 #define _ASM_X86_LDT_H
+#include <asm/desc_defs.h>
 
 /* Maximum number of LDT entries supported. */
 #define LDT_ENTRIES	8192
@@ -32,6 +33,24 @@ struct user_desc {
 #endif
 };
 
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
 #define MODIFY_LDT_CONTENTS_DATA	0
 #define MODIFY_LDT_CONTENTS_STACK	1
 #define MODIFY_LDT_CONTENTS_CODE	2
-- 
1.5.0.6

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,92 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#include <asm/desc_defs.h>
+
+#ifndef __ASSEMBLY__
+#include <asm/mmu.h>
+
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#ifndef __ASSEMBLY__
+
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+static inline unsigned long get_desc_base(unsigned long *desc)
+{
+	unsigned long base;
+	base = ((desc[0] >> 16)  & 0x0000ffff) |
+		((desc[1] << 16) & 0x00ff0000) |
+		(desc[1] & 0xff000000);
+	return base;
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
+#endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,68 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,42 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 74d2b65..98f428b 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struct *p, int idx,
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6056c6d..ef5ab2b 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 926d6f8..3480cb1 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -55,13 +55,9 @@ static inline void load_LDT(mm_context_t *pc)
 	preempt_enable();
 }
 
-static inline unsigned long get_desc_base(unsigned long *desc)
+static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
 
 #else
-- 
1.5.0.6

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,11 +5,180 @@
 
 #ifndef __ASSEMBLY__
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d,
+					 unsigned long tss, unsigned type,
+					 unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
 #endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+#endif /* __ASSEMBLY__ */
+
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -15,6 +15,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -25,6 +41,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -228,6 +254,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };
 

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -147,6 +147,39 @@ static inline void pack_ldt(ldt_desc *ld
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, sizeof(tss));
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -205,13 +238,6 @@ static inline void native_load_tls(struc
 }
 #endif /* __ASSEMBLY__ */
 
-
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #ifndef __ASSEMBLY__
 
 #define _LDT_empty(info) (\
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -147,6 +147,39 @@ static inline void pack_ldt(ldt_desc *ld
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, sizeof(tss));
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -205,13 +238,6 @@ static inline void native_load_tls(struc
 }
 #endif /* __ASSEMBLY__ */
 
-
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #ifndef __ASSEMBLY__
 
 #define _LDT_empty(info) (\
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -15,6 +15,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -25,6 +41,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -228,6 +254,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,11 +5,180 @@
 
 #ifndef __ASSEMBLY__
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d,
+					 unsigned long tss, unsigned type,
+					 unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
 #endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, sizeof(ldt));
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+#endif /* __ASSEMBLY__ */
+
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, sizeof(tss_desc));
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 74d2b65..98f428b 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struct *p, int idx,
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6056c6d..ef5ab2b 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 926d6f8..3480cb1 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -55,13 +55,9 @@ static inline void load_LDT(mm_context_t *pc)
 	preempt_enable();
 }
 
-static inline unsigned long get_desc_base(unsigned long *desc)
+static inline unsigned long get_desc_base(struct desc_struct *desc)
 {
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
 
 #else
-- 
1.5.0.6

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,92 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#include <asm/desc_defs.h>
+
+#ifndef __ASSEMBLY__
+#include <asm/mmu.h>
+
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#ifndef __ASSEMBLY__
+
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+static inline unsigned long get_desc_base(unsigned long *desc)
+{
+	unsigned long base;
+	base = ((desc[0] >> 16)  & 0x0000ffff) |
+		((desc[1] << 16) & 0x00ff0000) |
+		(desc[1] & 0xff000000);
+	return base;
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
+#endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,68 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,42 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

Re: [PATCH 09/19] introduce fill_ldt

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> diff --git a/include/asm-x86/ldt.h b/include/asm-x86/ldt.h
> index 20c5972..49013fd 100644
> --- a/include/asm-x86/ldt.h
> +++ b/include/asm-x86/ldt.h
> @@ -5,6 +5,7 @@
>   */
>  #ifndef _ASM_X86_LDT_H
>  #define _ASM_X86_LDT_H
> +#include <asm/desc_defs.h>

this breaks CONFIG_HEADERS_CHECK=y, because asm/desc_defs.h is not an 
exported header.

	Ingo

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Since the last version of it received no comments on the interfaces, 
> here it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the 
> #defines in the desc_struct definition were merged. I also implemented 
> the vmi functions, missing last time.
>
> Ingo, in the absense of further complaints, could you please push to 
> the x86 tree?

yeah, i've added them.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Since the last version of it received no comments on the interfaces, 
> here it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the 
> #defines in the desc_struct definition were merged. I also implemented 
> the vmi functions, missing last time.
>
> Ingo, in the absense of further complaints, could you please push to 
> the x86 tree?

yeah, i've added them.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

[-- Attachment #1: Type: text/plain, Size: 669 bytes --]


* Ingo Molnar <mingo@elte.hu> wrote:

> > Since the last version of it received no comments on the interfaces, 
> > here it goes a version, that I feel ready for inclusion.
> > 
> > The comments regarding style, specially the elimination of the
> > #defines in the desc_struct definition were merged. I also 
> > #implemented
> > the vmi functions, missing last time.
> >
> > Ingo, in the absense of further complaints, could you please push to 
> > the x86 tree?
> 
> yeah, i've added them.

the patches cause a spontaneous reboot on x86 64-bit, around the time 
when bootup hits user-space. It's due to one of the 25 patches from you 
today. Config attached.

	Ingo

[-- Attachment #2: config --]
[-- Type: text/plain, Size: 49420 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.24-rc5
# Wed Dec 12 18:54:14 2007
#
CONFIG_64BIT=y
# CONFIG_X86_32 is not set
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
# CONFIG_QUICKLIST is not set
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
# CONFIG_GENERIC_GPIO is not set
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_ZONE_DMA32=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
# CONFIG_KTIME_SCALAR is not set
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
# CONFIG_TASK_DELAY_ACCT is not set
# CONFIG_TASK_XACCT is not set
# CONFIG_USER_NS is not set
CONFIG_PID_NS=y
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=20
# CONFIG_CGROUPS is not set
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_FAIR_USER_SCHED=y
# CONFIG_FAIR_CGROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_UNLOAD is not set
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_KMOD is not set
CONFIG_BLOCK=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BLK_DEV_BSG=y
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_AS is not set
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
CONFIG_DEFAULT_DEADLINE=y
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="deadline"

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
# CONFIG_SMP is not set
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_X86_RDC321X is not set
# CONFIG_X86_VSMP is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
CONFIG_MPSC=y
# CONFIG_MCORE2 is not set
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_L1_CACHE_BYTES=128
CONFIG_X86_INTERNODE_CACHE_BYTES=128
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_TSC=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_HPET_TIMER=y
CONFIG_GART_IOMMU=y
# CONFIG_CALGARY_IOMMU is not set
CONFIG_SWIOTLB=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
CONFIG_X86_MCE_AMD=y
CONFIG_MICROCODE=y
CONFIG_MICROCODE_OLD_INTERFACE=y
# CONFIG_X86_MSR is not set
CONFIG_X86_CPUID=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_MEMORY_PROBE=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
# CONFIG_SPARSEMEM_STATIC is not set
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
# CONFIG_MTRR is not set
# CONFIG_SECCOMP is not set
# CONFIG_CC_STACKPROTECTOR is not set
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
CONFIG_PHYSICAL_START=0x200000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x200000
# CONFIG_COMPAT_VDSO is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
CONFIG_PM_DEBUG=y
CONFIG_PM_VERBOSE=y
CONFIG_SUSPEND_UP_POSSIBLE=y
# CONFIG_SUSPEND is not set
CONFIG_HIBERNATION_UP_POSSIBLE=y
CONFIG_ACPI=y
CONFIG_ACPI_PROCFS=y
# CONFIG_ACPI_PROCFS_POWER is not set
# CONFIG_ACPI_PROC_EVENT is not set
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set
CONFIG_ACPI_BUTTON=m
CONFIG_ACPI_FAN=m
# CONFIG_ACPI_DOCK is not set
# CONFIG_ACPI_PROCESSOR is not set
CONFIG_ACPI_ASUS=y
# CONFIG_ACPI_TOSHIBA is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_DEBUG_FUNC_TRACE=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
CONFIG_ACPI_HOTPLUG_MEMORY=m
# CONFIG_ACPI_SBS is not set

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_DEBUG=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
CONFIG_CPU_FREQ_GOV_USERSPACE=m
# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y

#
# CPUFreq processor drivers
#
CONFIG_X86_POWERNOW_K8=m
CONFIG_X86_P4_CLOCKMOD=y

#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=y
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
CONFIG_PCI_DIRECT=y
# CONFIG_PCI_MMCONFIG is not set
CONFIG_PCI_DOMAINS=y
CONFIG_DMAR=y
# CONFIG_DMAR_GFX_WA is not set
CONFIG_DMAR_FLOPPY_WA=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
CONFIG_PCI_LEGACY=y
CONFIG_HT_IRQ=y
CONFIG_ISA_DMA_API=y
CONFIG_K8_NB=y
# CONFIG_PCCARD is not set
CONFIG_HOTPLUG_PCI=m
# CONFIG_HOTPLUG_PCI_FAKE is not set
CONFIG_HOTPLUG_PCI_ACPI=m
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=m

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=y
CONFIG_IA32_EMULATION=y
CONFIG_IA32_AOUT=m
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y

#
# Networking
#
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
CONFIG_XFRM_MIGRATE=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_ASK_IP_FIB_HASH is not set
CONFIG_IP_FIB_TRIE=y
# CONFIG_IP_FIB_HASH is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
# CONFIG_IP_PNP_DHCP is not set
CONFIG_IP_PNP_BOOTP=y
# CONFIG_IP_PNP_RARP is not set
CONFIG_NET_IPIP=y
CONFIG_NET_IPGRE=m
CONFIG_ARPD=y
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
CONFIG_INET_ESP=y
CONFIG_INET_IPCOMP=y
CONFIG_INET_XFRM_TUNNEL=y
CONFIG_INET_TUNNEL=y
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
# CONFIG_INET_XFRM_MODE_BEET is not set
CONFIG_INET_LRO=y
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
CONFIG_TCP_MD5SIG=y
# CONFIG_IP_VS is not set
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
CONFIG_INET6_IPCOMP=m
# CONFIG_IPV6_MIP6 is not set
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
# CONFIG_INET6_XFRM_MODE_TUNNEL is not set
# CONFIG_INET6_XFRM_MODE_BEET is not set
CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=m
CONFIG_IPV6_SIT=m
CONFIG_IPV6_TUNNEL=m
# CONFIG_IPV6_MULTIPLE_TABLES is not set
CONFIG_NETLABEL=y
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
CONFIG_NETFILTER_DEBUG=y
# CONFIG_BRIDGE_NETFILTER is not set

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK_ENABLED=y
CONFIG_NF_CONNTRACK=y
CONFIG_NF_CT_ACCT=y
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
# CONFIG_NF_CT_PROTO_SCTP is not set
# CONFIG_NF_CT_PROTO_UDPLITE is not set
CONFIG_NF_CONNTRACK_AMANDA=y
CONFIG_NF_CONNTRACK_FTP=y
CONFIG_NF_CONNTRACK_H323=m
# CONFIG_NF_CONNTRACK_IRC is not set
# CONFIG_NF_CONNTRACK_NETBIOS_NS is not set
# CONFIG_NF_CONNTRACK_PPTP is not set
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=y
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NETFILTER_XTABLES=y
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
# CONFIG_NETFILTER_XT_TARGET_CONNMARK is not set
CONFIG_NETFILTER_XT_TARGET_DSCP=y
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
CONFIG_NETFILTER_XT_TARGET_NFLOG=y
# CONFIG_NETFILTER_XT_TARGET_SECMARK is not set
# CONFIG_NETFILTER_XT_TARGET_CONNSECMARK is not set
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
# CONFIG_NETFILTER_XT_MATCH_COMMENT is not set
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
# CONFIG_NETFILTER_XT_MATCH_CONNLIMIT is not set
# CONFIG_NETFILTER_XT_MATCH_CONNMARK is not set
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=y
CONFIG_NETFILTER_XT_MATCH_HELPER=y
# CONFIG_NETFILTER_XT_MATCH_LENGTH is not set
# CONFIG_NETFILTER_XT_MATCH_LIMIT is not set
CONFIG_NETFILTER_XT_MATCH_MAC=m
# CONFIG_NETFILTER_XT_MATCH_MARK is not set
CONFIG_NETFILTER_XT_MATCH_POLICY=y
# CONFIG_NETFILTER_XT_MATCH_MULTIPORT is not set
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
# CONFIG_NETFILTER_XT_MATCH_QUOTA is not set
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
# CONFIG_NETFILTER_XT_MATCH_STRING is not set
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
# CONFIG_NETFILTER_XT_MATCH_TIME is not set
CONFIG_NETFILTER_XT_MATCH_U32=y
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m

#
# IP: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV4=y
# CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
CONFIG_IP_NF_QUEUE=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_MATCH_IPRANGE=y
# CONFIG_IP_NF_MATCH_TOS is not set
CONFIG_IP_NF_MATCH_RECENT=m
# CONFIG_IP_NF_MATCH_ECN is not set
CONFIG_IP_NF_MATCH_AH=m
# CONFIG_IP_NF_MATCH_TTL is not set
CONFIG_IP_NF_MATCH_OWNER=y
CONFIG_IP_NF_MATCH_ADDRTYPE=y
CONFIG_IP_NF_FILTER=m
# CONFIG_IP_NF_TARGET_REJECT is not set
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_SAME=m
# CONFIG_NF_NAT_SNMP_BASIC is not set
CONFIG_NF_NAT_FTP=m
# CONFIG_NF_NAT_IRC is not set
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_AMANDA=m
# CONFIG_NF_NAT_PPTP is not set
CONFIG_NF_NAT_H323=m
CONFIG_NF_NAT_SIP=m
CONFIG_IP_NF_MANGLE=y
# CONFIG_IP_NF_TARGET_TOS is not set
CONFIG_IP_NF_TARGET_ECN=y
# CONFIG_IP_NF_TARGET_TTL is not set
CONFIG_IP_NF_TARGET_CLUSTERIP=y
# CONFIG_IP_NF_RAW is not set
# CONFIG_IP_NF_ARPTABLES is not set

#
# IPv6: Netfilter Configuration (EXPERIMENTAL)
#
# CONFIG_NF_CONNTRACK_IPV6 is not set
# CONFIG_IP6_NF_QUEUE is not set
# CONFIG_IP6_NF_IPTABLES is not set

#
# DECnet: Netfilter Configuration
#
# CONFIG_DECNET_NF_GRABULATOR is not set

#
# Bridge: Netfilter Configuration
#
# CONFIG_BRIDGE_NF_EBTABLES is not set
CONFIG_IP_DCCP=m

#
# DCCP CCIDs Configuration (EXPERIMENTAL)
#
# CONFIG_IP_DCCP_CCID2 is not set
CONFIG_IP_DCCP_CCID3=m
CONFIG_IP_DCCP_TFRC_LIB=m
CONFIG_IP_DCCP_CCID3_DEBUG=y
CONFIG_IP_DCCP_CCID3_RTO=100
CONFIG_IP_SCTP=m
CONFIG_SCTP_DBG_MSG=y
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
CONFIG_SCTP_HMAC_SHA1=y
# CONFIG_SCTP_HMAC_MD5 is not set
CONFIG_TIPC=y
# CONFIG_TIPC_ADVANCED is not set
CONFIG_TIPC_DEBUG=y
# CONFIG_ATM is not set
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
CONFIG_DECNET=y
# CONFIG_DECNET_ROUTER is not set
CONFIG_LLC=y
CONFIG_LLC2=y
CONFIG_IPX=m
CONFIG_IPX_INTERN=y
CONFIG_ATALK=y
CONFIG_DEV_APPLETALK=m
# CONFIG_IPDDP is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
CONFIG_ECONET=m
# CONFIG_ECONET_AUNUDP is not set
# CONFIG_ECONET_NATIVE is not set
CONFIG_WAN_ROUTER=y
# CONFIG_NET_SCHED is not set
CONFIG_NET_CLS_ROUTE=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
CONFIG_NET_TCPPROBE=m
CONFIG_HAMRADIO=y

#
# Packet Radio protocols
#
CONFIG_AX25=m
CONFIG_AX25_DAMA_SLAVE=y
CONFIG_NETROM=m
# CONFIG_ROSE is not set

#
# AX.25 network device drivers
#
CONFIG_MKISS=m
CONFIG_6PACK=m
CONFIG_BPQETHER=m
CONFIG_BAYCOM_SER_FDX=m
# CONFIG_BAYCOM_SER_HDX is not set
# CONFIG_BAYCOM_PAR is not set
CONFIG_YAM=m
CONFIG_IRDA=m

#
# IrDA protocols
#
# CONFIG_IRLAN is not set
CONFIG_IRNET=m
# CONFIG_IRCOMM is not set
CONFIG_IRDA_ULTRA=y

#
# IrDA options
#
# CONFIG_IRDA_CACHE_LAST_LSAP is not set
# CONFIG_IRDA_FAST_RR is not set
# CONFIG_IRDA_DEBUG is not set

#
# Infrared-port device drivers
#

#
# SIR device drivers
#
CONFIG_IRTTY_SIR=m

#
# Dongle support
#
CONFIG_DONGLE=y
CONFIG_ESI_DONGLE=m
CONFIG_ACTISYS_DONGLE=m
# CONFIG_TEKRAM_DONGLE is not set
CONFIG_TOIM3232_DONGLE=m
CONFIG_LITELINK_DONGLE=m
# CONFIG_MA600_DONGLE is not set
CONFIG_GIRBIL_DONGLE=m
CONFIG_MCP2120_DONGLE=m
CONFIG_OLD_BELKIN_DONGLE=m
# CONFIG_ACT200L_DONGLE is not set
CONFIG_KINGSUN_DONGLE=m
# CONFIG_KSDAZZLE_DONGLE is not set
# CONFIG_KS959_DONGLE is not set

#
# Old SIR device drivers
#
CONFIG_IRPORT_SIR=m

#
# Old Serial dongle support
#
CONFIG_DONGLE_OLD=y
CONFIG_ESI_DONGLE_OLD=m
# CONFIG_ACTISYS_DONGLE_OLD is not set
# CONFIG_TEKRAM_DONGLE_OLD is not set
CONFIG_GIRBIL_DONGLE_OLD=m
# CONFIG_LITELINK_DONGLE_OLD is not set
CONFIG_MCP2120_DONGLE_OLD=m
CONFIG_OLD_BELKIN_DONGLE_OLD=m
CONFIG_ACT200L_DONGLE_OLD=m
CONFIG_MA600_DONGLE_OLD=m

#
# FIR device drivers
#
# CONFIG_USB_IRDA is not set
CONFIG_SIGMATEL_FIR=m
# CONFIG_NSC_FIR is not set
# CONFIG_WINBOND_FIR is not set
# CONFIG_SMC_IRCC_FIR is not set
# CONFIG_ALI_FIR is not set
# CONFIG_VLSI_FIR is not set
# CONFIG_VIA_FIR is not set
# CONFIG_MCS_FIR is not set
CONFIG_BT=m
# CONFIG_BT_L2CAP is not set
CONFIG_BT_SCO=m

#
# Bluetooth device drivers
#
# CONFIG_BT_HCIUSB is not set
# CONFIG_BT_HCIBTUSB is not set
CONFIG_BT_HCIUART=m
# CONFIG_BT_HCIUART_H4 is not set
CONFIG_BT_HCIUART_BCSP=y
# CONFIG_BT_HCIUART_LL is not set
# CONFIG_BT_HCIBCM203X is not set
CONFIG_BT_HCIBPA10X=m
# CONFIG_BT_HCIBFUSB is not set
CONFIG_BT_HCIVHCI=m
CONFIG_AF_RXRPC=y
# CONFIG_AF_RXRPC_DEBUG is not set
# CONFIG_RXKAD is not set
CONFIG_FIB_RULES=y

#
# Wireless
#
CONFIG_CFG80211=y
CONFIG_NL80211=y
CONFIG_WIRELESS_EXT=y
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
CONFIG_RFKILL=y
CONFIG_RFKILL_INPUT=m
# CONFIG_NET_9P is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=m
# CONFIG_MTD is not set
CONFIG_PARPORT=m
# CONFIG_PARPORT_PC is not set
# CONFIG_PARPORT_GSC is not set
# CONFIG_PARPORT_AX88796 is not set
# CONFIG_PARPORT_1284 is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_CPQ_DA=y
# CONFIG_BLK_CPQ_CISS_DA is not set
CONFIG_BLK_DEV_DAC960=y
CONFIG_BLK_DEV_UMEM=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_SX8=m
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
CONFIG_CDROM_PKTCDVD=y
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_MISC_DEVICES=y
CONFIG_IBM_ASM=m
# CONFIG_PHANTOM is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_SGI_IOC4 is not set
CONFIG_TIFM_CORE=m
# CONFIG_TIFM_7XX1 is not set
# CONFIG_FUJITSU_LAPTOP is not set
# CONFIG_MSI_LAPTOP is not set
# CONFIG_SONY_LAPTOP is not set
CONFIG_THINKPAD_ACPI=m
# CONFIG_THINKPAD_ACPI_DEBUG is not set
# CONFIG_THINKPAD_ACPI_DOCK is not set
# CONFIG_THINKPAD_ACPI_BAY is not set
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_TGT=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
CONFIG_CHR_DEV_OSST=m
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_FC_ATTRS=y
CONFIG_SCSI_FC_TGT_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=y
CONFIG_SCSI_SAS_ATTRS=y
CONFIG_SCSI_SAS_LIBSAS=m
# CONFIG_SCSI_SAS_ATA is not set
# CONFIG_SCSI_SAS_LIBSAS_DEBUG is not set
CONFIG_SCSI_SRP_ATTRS=m
# CONFIG_SCSI_SRP_TGT_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=y
CONFIG_BLK_DEV_3W_XXXX_RAID=m
CONFIG_SCSI_3W_9XXX=m
# CONFIG_SCSI_ACARD is not set
CONFIG_SCSI_AACRAID=y
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=32
CONFIG_AIC7XXX_RESET_DELAY_MS=5000
CONFIG_AIC7XXX_DEBUG_ENABLE=y
CONFIG_AIC7XXX_DEBUG_MASK=0
# CONFIG_AIC7XXX_REG_PRETTY_PRINT is not set
CONFIG_SCSI_AIC7XXX_OLD=y
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
CONFIG_SCSI_ADVANSYS=y
CONFIG_SCSI_ARCMSR=y
# CONFIG_MEGARAID_NEWGEN is not set
CONFIG_MEGARAID_LEGACY=m
CONFIG_MEGARAID_SAS=y
CONFIG_SCSI_HPTIOP=y
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_DMX3191D is not set
CONFIG_SCSI_EATA=m
# CONFIG_SCSI_EATA_TAGGED_QUEUE is not set
CONFIG_SCSI_EATA_LINKED_COMMANDS=y
CONFIG_SCSI_EATA_MAX_TAGS=16
CONFIG_SCSI_FUTURE_DOMAIN=m
# CONFIG_SCSI_GDTH is not set
CONFIG_SCSI_IPS=m
CONFIG_SCSI_INITIO=m
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
CONFIG_SCSI_IPR=m
# CONFIG_SCSI_IPR_TRACE is not set
# CONFIG_SCSI_IPR_DUMP is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
CONFIG_SCSI_QLA_FC=m
CONFIG_SCSI_QLA_ISCSI=y
CONFIG_SCSI_LPFC=y
CONFIG_SCSI_DC395x=m
CONFIG_SCSI_DC390T=y
# CONFIG_SCSI_DEBUG is not set
CONFIG_SCSI_SRP=y
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_SATA_AHCI=y
CONFIG_SATA_SVW=y
CONFIG_ATA_PIIX=y
CONFIG_SATA_MV=m
# CONFIG_SATA_NV is not set
CONFIG_PDC_ADMA=y
CONFIG_SATA_QSTOR=y
CONFIG_SATA_PROMISE=y
CONFIG_SATA_SX4=m
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIL24 is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
CONFIG_SATA_VITESSE=m
CONFIG_SATA_INIC162X=m
CONFIG_PATA_ACPI=m
CONFIG_PATA_ALI=y
CONFIG_PATA_AMD=y
# CONFIG_PATA_ARTOP is not set
CONFIG_PATA_ATIIXP=m
CONFIG_PATA_CMD640_PCI=y
# CONFIG_PATA_CMD64X is not set
CONFIG_PATA_CS5520=m
# CONFIG_PATA_CS5530 is not set
CONFIG_PATA_CYPRESS=m
CONFIG_PATA_EFAR=m
# CONFIG_ATA_GENERIC is not set
CONFIG_PATA_HPT366=y
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
CONFIG_PATA_HPT3X3=y
# CONFIG_PATA_HPT3X3_DMA is not set
CONFIG_PATA_IT821X=m
CONFIG_PATA_IT8213=m
CONFIG_PATA_JMICRON=m
CONFIG_PATA_TRIFLEX=m
CONFIG_PATA_MARVELL=m
CONFIG_PATA_MPIIX=m
CONFIG_PATA_OLDPIIX=y
CONFIG_PATA_NETCELL=y
# CONFIG_PATA_NS87410 is not set
CONFIG_PATA_NS87415=y
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC_OLD is not set
CONFIG_PATA_RADISYS=y
CONFIG_PATA_RZ1000=m
CONFIG_PATA_SC1200=m
CONFIG_PATA_SERVERWORKS=m
# CONFIG_PATA_PDC2027X is not set
CONFIG_PATA_SIL680=m
CONFIG_PATA_SIS=m
# CONFIG_PATA_VIA is not set
CONFIG_PATA_WINBOND=y
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=y
CONFIG_MD_RAID5_RESHAPE=y
CONFIG_MD_MULTIPATH=y
CONFIG_MD_FAULTY=y
CONFIG_BLK_DEV_DM=m
CONFIG_DM_DEBUG=y
# CONFIG_DM_CRYPT is not set
# CONFIG_DM_SNAPSHOT is not set
CONFIG_DM_MIRROR=m
# CONFIG_DM_ZERO is not set
# CONFIG_DM_MULTIPATH is not set
CONFIG_DM_DELAY=m
CONFIG_DM_UEVENT=y
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
CONFIG_IEEE1394=y

#
# Subsystem Options
#
# CONFIG_IEEE1394_VERBOSEDEBUG is not set

#
# Controllers
#
CONFIG_IEEE1394_PCILYNX=y
CONFIG_IEEE1394_OHCI1394=y

#
# Protocols
#
CONFIG_IEEE1394_VIDEO1394=m
CONFIG_IEEE1394_SBP2=m
CONFIG_IEEE1394_SBP2_PHYS_DMA=y
# CONFIG_IEEE1394_ETH1394_ROM_ENTRY is not set
# CONFIG_IEEE1394_ETH1394 is not set
# CONFIG_IEEE1394_DV1394 is not set
# CONFIG_IEEE1394_RAWIO is not set
CONFIG_I2O=y
CONFIG_I2O_LCT_NOTIFY_ON_CHANGES=y
# CONFIG_I2O_EXT_ADAPTEC is not set
CONFIG_I2O_CONFIG=y
CONFIG_I2O_CONFIG_OLD_IOCTL=y
CONFIG_I2O_BUS=m
CONFIG_I2O_BLOCK=y
# CONFIG_I2O_SCSI is not set
CONFIG_I2O_PROC=m
CONFIG_MACINTOSH_DRIVERS=y
# CONFIG_MAC_EMUMOUSEBTN is not set
CONFIG_NETDEVICES=y
CONFIG_NETDEVICES_MULTIQUEUE=y
CONFIG_DUMMY=y
CONFIG_BONDING=m
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=y
CONFIG_VETH=m
CONFIG_NET_SB1000=m
# CONFIG_IP1000 is not set
CONFIG_ARCNET=m
# CONFIG_ARCNET_1201 is not set
CONFIG_ARCNET_1051=m
# CONFIG_ARCNET_RAW is not set
CONFIG_ARCNET_CAP=m
# CONFIG_ARCNET_COM90xx is not set
# CONFIG_ARCNET_COM90xxIO is not set
# CONFIG_ARCNET_RIM_I is not set
# CONFIG_ARCNET_COM20020 is not set
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
CONFIG_DAVICOM_PHY=y
CONFIG_QSEMI_PHY=y
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
CONFIG_VITESSE_PHY=m
CONFIG_SMSC_PHY=y
CONFIG_BROADCOM_PHY=m
CONFIG_ICPLUS_PHY=m
CONFIG_FIXED_PHY=m
CONFIG_FIXED_MII_10_FDX=y
# CONFIG_FIXED_MII_100_FDX is not set
CONFIG_FIXED_MII_1000_FDX=y
CONFIG_FIXED_MII_AMNT=1
CONFIG_MDIO_BITBANG=y
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
CONFIG_HAPPYMEAL=m
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_TULIP is not set
CONFIG_HP100=y
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
CONFIG_AMD8111_ETH=m
CONFIG_AMD8111E_NAPI=y
CONFIG_ADAPTEC_STARFIRE=m
CONFIG_ADAPTEC_STARFIRE_NAPI=y
CONFIG_B44=m
CONFIG_B44_PCI_AUTOSELECT=y
CONFIG_B44_PCICORE_AUTOSELECT=y
CONFIG_B44_PCI=y
CONFIG_FORCEDETH=y
# CONFIG_FORCEDETH_NAPI is not set
CONFIG_EEPRO100=m
CONFIG_E100=y
CONFIG_FEALNX=m
CONFIG_NATSEMI=y
CONFIG_NE2K_PCI=y
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
# CONFIG_8139TOO_PIO is not set
CONFIG_8139TOO_TUNE_TWISTER=y
CONFIG_8139TOO_8129=y
CONFIG_8139_OLD_RX_RESET=y
CONFIG_SIS900=y
CONFIG_EPIC100=y
# CONFIG_SUNDANCE is not set
CONFIG_VIA_RHINE=y
CONFIG_VIA_RHINE_MMIO=y
# CONFIG_VIA_RHINE_NAPI is not set
CONFIG_SC92031=y
CONFIG_NET_POCKET=y
CONFIG_ATP=m
# CONFIG_DE600 is not set
CONFIG_DE620=m
CONFIG_NETDEV_1000=y
CONFIG_ACENIC=m
CONFIG_ACENIC_OMIT_TIGON_I=y
# CONFIG_DL2K is not set
CONFIG_E1000=y
CONFIG_E1000_NAPI=y
CONFIG_E1000_DISABLE_PACKET_SPLIT=y
CONFIG_E1000E=m
CONFIG_NS83820=y
CONFIG_HAMACHI=m
# CONFIG_YELLOWFIN is not set
CONFIG_R8169=m
# CONFIG_R8169_NAPI is not set
# CONFIG_R8169_VLAN is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
CONFIG_SKY2=m
CONFIG_SKY2_DEBUG=y
CONFIG_SK98LIN=m
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
CONFIG_QLA3XXX=y
CONFIG_ATL1=y
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
CONFIG_CHELSIO_T3=m
CONFIG_IXGBE=y
CONFIG_IXGB=m
# CONFIG_IXGB_NAPI is not set
# CONFIG_S2IO is not set
CONFIG_MYRI10GE=y
# CONFIG_NETXEN_NIC is not set
CONFIG_NIU=m
# CONFIG_MLX4_CORE is not set
CONFIG_TEHUTI=m
CONFIG_TR=y
CONFIG_IBMOL=m
# CONFIG_3C359 is not set
CONFIG_TMS380TR=m
# CONFIG_TMSPCI is not set
CONFIG_ABYSS=m

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set

#
# USB Network Adapters
#
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
CONFIG_USB_PEGASUS=y
CONFIG_USB_RTL8150=m
CONFIG_USB_USBNET=m
CONFIG_USB_NET_AX8817X=m
CONFIG_USB_NET_CDCETHER=m
# CONFIG_USB_NET_DM9601 is not set
CONFIG_USB_NET_GL620A=m
# CONFIG_USB_NET_NET1080 is not set
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_MCS7830=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
# CONFIG_USB_ALI_M5632 is not set
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
# CONFIG_USB_ARMLINUX is not set
CONFIG_USB_EPSON2888=y
# CONFIG_USB_KC2190 is not set
CONFIG_USB_NET_ZAURUS=m
# CONFIG_WAN is not set
CONFIG_FDDI=y
# CONFIG_DEFXX is not set
# CONFIG_SKFP is not set
# CONFIG_HIPPI is not set
CONFIG_PLIP=m
CONFIG_PPP=y
CONFIG_PPP_MULTILINK=y
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=y
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
# CONFIG_PPP_MPPE is not set
CONFIG_PPPOE=y
# CONFIG_PPPOL2TP is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=y
CONFIG_NET_FC=y
CONFIG_SHAPER=m
CONFIG_NETCONSOLE=y
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
# CONFIG_ISDN is not set
CONFIG_PHONE=m
# CONFIG_PHONE_IXJ is not set

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=y
CONFIG_INPUT_POLLDEV=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=y
CONFIG_INPUT_EVDEV=y
CONFIG_INPUT_EVBUG=y

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
CONFIG_KEYBOARD_SUNKBD=y
CONFIG_KEYBOARD_LKKBD=m
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_KEYBOARD_NEWTON=y
CONFIG_KEYBOARD_STOWAWAY=m
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=m
CONFIG_SERIO_CT82C710=y
CONFIG_SERIO_PARKBD=m
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
CONFIG_GAMEPORT=m
# CONFIG_GAMEPORT_NS558 is not set
# CONFIG_GAMEPORT_L4 is not set
# CONFIG_GAMEPORT_EMU10K1 is not set
# CONFIG_GAMEPORT_FM801 is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_PRINTER is not set
CONFIG_PPDEV=m
# CONFIG_TIPAR is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_NVRAM=m
CONFIG_RTC=m
CONFIG_GEN_RTC=y
CONFIG_GEN_RTC_X=y
CONFIG_R3964=m
# CONFIG_APPLICOM is not set
CONFIG_MWAVE=m
CONFIG_PC8736x_GPIO=m
CONFIG_NSC_GPIO=m
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
# CONFIG_HPET_RTC_IRQ is not set
# CONFIG_HPET_MMAP is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
CONFIG_TELCLOCK=m
CONFIG_DEVPORT=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_CHARDEV is not set

#
# I2C Algorithms
#
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ALGOPCF=y
CONFIG_I2C_ALGOPCA=m

#
# I2C Hardware Bus support
#
# CONFIG_I2C_ALI1535 is not set
CONFIG_I2C_ALI1563=m
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
CONFIG_I2C_I801=m
CONFIG_I2C_I810=m
CONFIG_I2C_PIIX4=m
CONFIG_I2C_NFORCE2=y
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_PARPORT=m
CONFIG_I2C_PARPORT_LIGHT=y
# CONFIG_I2C_PROSAVAGE is not set
# CONFIG_I2C_SAVAGE4 is not set
CONFIG_I2C_SIMTEC=y
# CONFIG_I2C_SIS5595 is not set
CONFIG_I2C_SIS630=m
# CONFIG_I2C_SIS96X is not set
CONFIG_I2C_TAOS_EVM=m
# CONFIG_I2C_STUB is not set
CONFIG_I2C_TINY_USB=y
CONFIG_I2C_VIA=m
# CONFIG_I2C_VIAPRO is not set
# CONFIG_I2C_VOODOO3 is not set

#
# Miscellaneous I2C Chip support
#
CONFIG_SENSORS_DS1337=y
# CONFIG_SENSORS_DS1374 is not set
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
CONFIG_SENSORS_PCF8574=y
CONFIG_SENSORS_PCA9539=y
CONFIG_SENSORS_PCF8591=m
CONFIG_SENSORS_MAX6875=y
# CONFIG_SENSORS_TSL2550 is not set
CONFIG_I2C_DEBUG_CORE=y
CONFIG_I2C_DEBUG_ALGO=y
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set

#
# SPI support
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set
CONFIG_W1=y
# CONFIG_W1_CON is not set

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_MATROX is not set
# CONFIG_W1_MASTER_DS2490 is not set
CONFIG_W1_MASTER_DS2482=m

#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=m
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2433 is not set
CONFIG_W1_SLAVE_DS2760=y
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
CONFIG_BATTERY_DS2760=y
CONFIG_HWMON=y
CONFIG_HWMON_VID=y
CONFIG_SENSORS_ABITUGURU=m
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_AD7418 is not set
CONFIG_SENSORS_ADM1021=y
CONFIG_SENSORS_ADM1025=m
CONFIG_SENSORS_ADM1026=m
CONFIG_SENSORS_ADM1029=y
CONFIG_SENSORS_ADM1031=y
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7470 is not set
CONFIG_SENSORS_K8TEMP=m
CONFIG_SENSORS_ASB100=m
CONFIG_SENSORS_ATXP1=y
# CONFIG_SENSORS_DS1621 is not set
CONFIG_SENSORS_I5K_AMB=y
CONFIG_SENSORS_F71805F=y
CONFIG_SENSORS_F71882FG=m
CONFIG_SENSORS_F75375S=m
# CONFIG_SENSORS_FSCHER is not set
CONFIG_SENSORS_FSCPOS=m
CONFIG_SENSORS_FSCHMD=y
CONFIG_SENSORS_GL518SM=m
CONFIG_SENSORS_GL520SM=m
CONFIG_SENSORS_CORETEMP=y
CONFIG_SENSORS_IT87=y
# CONFIG_SENSORS_LM63 is not set
CONFIG_SENSORS_LM75=m
CONFIG_SENSORS_LM77=y
CONFIG_SENSORS_LM78=m
# CONFIG_SENSORS_LM80 is not set
CONFIG_SENSORS_LM83=y
CONFIG_SENSORS_LM85=m
CONFIG_SENSORS_LM87=m
CONFIG_SENSORS_LM90=y
CONFIG_SENSORS_LM92=m
CONFIG_SENSORS_LM93=y
CONFIG_SENSORS_MAX1619=y
CONFIG_SENSORS_MAX6650=m
CONFIG_SENSORS_PC87360=y
CONFIG_SENSORS_PC87427=y
# CONFIG_SENSORS_SIS5595 is not set
CONFIG_SENSORS_DME1737=m
CONFIG_SENSORS_SMSC47M1=m
CONFIG_SENSORS_SMSC47M192=y
# CONFIG_SENSORS_SMSC47B397 is not set
CONFIG_SENSORS_THMC50=m
CONFIG_SENSORS_VIA686A=m
CONFIG_SENSORS_VT1211=m
CONFIG_SENSORS_VT8231=y
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
CONFIG_SENSORS_W83792D=y
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83L785TS is not set
CONFIG_SENSORS_W83627HF=m
CONFIG_SENSORS_W83627EHF=m
CONFIG_SENSORS_HDAPS=m
CONFIG_SENSORS_APPLESMC=y
CONFIG_HWMON_DEBUG_CHIP=y
# CONFIG_WATCHDOG is not set

#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
CONFIG_SSB=m
CONFIG_SSB_PCIHOST_POSSIBLE=y
CONFIG_SSB_PCIHOST=y
CONFIG_SSB_DEBUG=y
CONFIG_SSB_DRIVER_PCICORE_POSSIBLE=y
CONFIG_SSB_DRIVER_PCICORE=y

#
# Multifunction device drivers
#
# CONFIG_MFD_SM501 is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
CONFIG_DVB_CORE=m
CONFIG_DVB_CORE_ATTACH=y
# CONFIG_DVB_CAPTURE_DRIVERS is not set
CONFIG_DAB=y
CONFIG_USB_DABUSB=y

#
# Graphics support
#
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=m
CONFIG_AGP_SIS=y
CONFIG_AGP_VIA=y
CONFIG_DRM=m
CONFIG_DRM_TDFX=m
CONFIG_DRM_R128=m
# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_I810 is not set
# CONFIG_DRM_I830 is not set
# CONFIG_DRM_I915 is not set
CONFIG_DRM_MGA=m
CONFIG_DRM_SIS=m
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
CONFIG_VGASTATE=y
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_DDC=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
CONFIG_FB_SYS_FILLRECT=y
CONFIG_FB_SYS_COPYAREA=y
CONFIG_FB_SYS_IMAGEBLIT=y
CONFIG_FB_SYS_FOPS=y
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_SVGALIB=m
# CONFIG_FB_MACMODES is not set
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
CONFIG_FB_CYBER2000=m
CONFIG_FB_ARC=m
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
CONFIG_FB_UVESA=m
# CONFIG_FB_VESA is not set
CONFIG_FB_EFI=y
CONFIG_FB_HECUBA=y
CONFIG_FB_HGA=y
CONFIG_FB_HGA_ACCEL=y
# CONFIG_FB_S1D13XXX is not set
CONFIG_FB_NVIDIA=y
CONFIG_FB_NVIDIA_I2C=y
CONFIG_FB_NVIDIA_DEBUG=y
# CONFIG_FB_NVIDIA_BACKLIGHT is not set
CONFIG_FB_RIVA=y
CONFIG_FB_RIVA_I2C=y
CONFIG_FB_RIVA_DEBUG=y
# CONFIG_FB_RIVA_BACKLIGHT is not set
CONFIG_FB_LE80578=m
CONFIG_FB_CARILLO_RANCH=m
CONFIG_FB_INTEL=m
CONFIG_FB_INTEL_DEBUG=y
# CONFIG_FB_INTEL_I2C is not set
CONFIG_FB_MATROX=y
CONFIG_FB_MATROX_MILLENIUM=y
CONFIG_FB_MATROX_MYSTIQUE=y
# CONFIG_FB_MATROX_G is not set
CONFIG_FB_MATROX_I2C=m
# CONFIG_FB_MATROX_MULTIHEAD is not set
# CONFIG_FB_RADEON is not set
CONFIG_FB_ATY128=y
CONFIG_FB_ATY128_BACKLIGHT=y
CONFIG_FB_ATY=m
# CONFIG_FB_ATY_CT is not set
# CONFIG_FB_ATY_GX is not set
# CONFIG_FB_ATY_BACKLIGHT is not set
CONFIG_FB_S3=m
CONFIG_FB_SAVAGE=m
CONFIG_FB_SAVAGE_I2C=y
CONFIG_FB_SAVAGE_ACCEL=y
CONFIG_FB_SIS=m
CONFIG_FB_SIS_300=y
CONFIG_FB_SIS_315=y
CONFIG_FB_NEOMAGIC=m
# CONFIG_FB_KYRO is not set
CONFIG_FB_3DFX=y
CONFIG_FB_3DFX_ACCEL=y
CONFIG_FB_VOODOO1=m
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
CONFIG_FB_PM3=m
CONFIG_FB_GEODE=y
CONFIG_FB_GEODE_LX=m
CONFIG_FB_GEODE_GX=y
CONFIG_FB_GEODE_GX_SET_FBSIZE=y
CONFIG_FB_GEODE_GX_FBSIZE=0x1600000
CONFIG_FB_GEODE_GX1=y
# CONFIG_FB_VIRTUAL is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=y
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_CORGI=m
# CONFIG_BACKLIGHT_PROGEAR is not set
# CONFIG_BACKLIGHT_CARILLO_RANCH is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
# CONFIG_VIDEO_SELECT is not set
CONFIG_DUMMY_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE is not set
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_MONO=y
CONFIG_LOGO_LINUX_VGA16=y
# CONFIG_LOGO_LINUX_CLUT224 is not set

#
# Sound
#
CONFIG_SOUND=m

#
# Advanced Linux Sound Architecture
#
# CONFIG_SND is not set

#
# Open Sound System
#
CONFIG_SOUND_PRIME=m
CONFIG_SOUND_TRIDENT=m
CONFIG_SOUND_MSNDCLAS=m
CONFIG_MSNDCLAS_INIT_FILE="/etc/sound/msndinit.bin"
CONFIG_MSNDCLAS_PERM_FILE="/etc/sound/msndperm.bin"
# CONFIG_SOUND_MSNDPIN is not set
# CONFIG_SOUND_OSS is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_SUSPEND=y
CONFIG_USB_PERSIST=y
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_SPLIT_ISO=y
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
CONFIG_USB_ISP116X_HCD=y
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
CONFIG_USB_R8A66597_HCD=y

#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
CONFIG_USB_PRINTER=y

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
CONFIG_USB_STORAGE_DATAFAB=y
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
CONFIG_USB_STORAGE_JUMPSHOT=y
# CONFIG_USB_STORAGE_ALAUDA is not set
CONFIG_USB_STORAGE_KARMA=y
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
CONFIG_USB_MDC800=m
CONFIG_USB_MICROTEK=y
# CONFIG_USB_MON is not set

#
# USB port drivers
#
# CONFIG_USB_USS720 is not set

#
# USB Serial Converter support
#
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_CONSOLE=y
# CONFIG_USB_SERIAL_GENERIC is not set
CONFIG_USB_SERIAL_AIRCABLE=m
# CONFIG_USB_SERIAL_AIRPRIME is not set
CONFIG_USB_SERIAL_ARK3116=y
CONFIG_USB_SERIAL_BELKIN=m
CONFIG_USB_SERIAL_CH341=y
CONFIG_USB_SERIAL_WHITEHEAT=y
CONFIG_USB_SERIAL_DIGI_ACCELEPORT=m
# CONFIG_USB_SERIAL_CP2101 is not set
CONFIG_USB_SERIAL_CYPRESS_M8=y
CONFIG_USB_SERIAL_EMPEG=m
CONFIG_USB_SERIAL_FTDI_SIO=m
# CONFIG_USB_SERIAL_FUNSOFT is not set
CONFIG_USB_SERIAL_VISOR=m
CONFIG_USB_SERIAL_IPAQ=y
CONFIG_USB_SERIAL_IR=m
CONFIG_USB_SERIAL_EDGEPORT=m
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
CONFIG_USB_SERIAL_GARMIN=m
# CONFIG_USB_SERIAL_IPW is not set
CONFIG_USB_SERIAL_KEYSPAN_PDA=m
CONFIG_USB_SERIAL_KEYSPAN=m
# CONFIG_USB_SERIAL_KEYSPAN_MPR is not set
CONFIG_USB_SERIAL_KEYSPAN_USA28=y
# CONFIG_USB_SERIAL_KEYSPAN_USA28X is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA28XA is not set
CONFIG_USB_SERIAL_KEYSPAN_USA28XB=y
CONFIG_USB_SERIAL_KEYSPAN_USA19=y
# CONFIG_USB_SERIAL_KEYSPAN_USA18X is not set
# CONFIG_USB_SERIAL_KEYSPAN_USA19W is not set
CONFIG_USB_SERIAL_KEYSPAN_USA19QW=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QI=y
CONFIG_USB_SERIAL_KEYSPAN_USA49W=y
# CONFIG_USB_SERIAL_KEYSPAN_USA49WLC is not set
# CONFIG_USB_SERIAL_KLSI is not set
CONFIG_USB_SERIAL_KOBIL_SCT=y
CONFIG_USB_SERIAL_MCT_U232=y
CONFIG_USB_SERIAL_MOS7720=m
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
CONFIG_USB_SERIAL_OTI6858=y
CONFIG_USB_SERIAL_HP4X=m
CONFIG_USB_SERIAL_SAFE=m
CONFIG_USB_SERIAL_SAFE_PADDED=y
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
CONFIG_USB_SERIAL_TI=m
CONFIG_USB_SERIAL_CYBERJACK=m
CONFIG_USB_SERIAL_XIRCOM=y
CONFIG_USB_SERIAL_OPTION=y
CONFIG_USB_SERIAL_OMNINET=m
CONFIG_USB_SERIAL_DEBUG=m
CONFIG_USB_EZUSB=y

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
CONFIG_USB_EMI26=m
CONFIG_USB_ADUTUX=m
CONFIG_USB_AUERSWALD=m
# CONFIG_USB_RIO500 is not set
CONFIG_USB_LEGOTOWER=y
CONFIG_USB_LCD=y
CONFIG_USB_BERRY_CHARGE=y
CONFIG_USB_LED=y
# CONFIG_USB_CYPRESS_CY7C63 is not set
CONFIG_USB_CYTHERM=y
CONFIG_USB_PHIDGET=m
CONFIG_USB_PHIDGETKIT=m
CONFIG_USB_PHIDGETMOTORCONTROL=m
CONFIG_USB_PHIDGETSERVO=m
CONFIG_USB_IDMOUSE=y
# CONFIG_USB_FTDI_ELAN is not set
CONFIG_USB_APPLEDISPLAY=m
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
CONFIG_USB_TRANCEVIBRATOR=y
CONFIG_USB_IOWARRIOR=y
CONFIG_USB_TEST=m

#
# USB DSL modem support
#

#
# USB Gadget Support
#
CONFIG_USB_GADGET=m
# CONFIG_USB_GADGET_DEBUG_FILES is not set
# CONFIG_USB_GADGET_DEBUG_FS is not set
CONFIG_USB_GADGET_SELECTED=y
# CONFIG_USB_GADGET_AMD5536UDC is not set
# CONFIG_USB_GADGET_ATMEL_USBA is not set
# CONFIG_USB_GADGET_FSL_USB2 is not set
# CONFIG_USB_GADGET_NET2280 is not set
# CONFIG_USB_GADGET_PXA2XX is not set
# CONFIG_USB_GADGET_M66592 is not set
CONFIG_USB_GADGET_GOKU=y
CONFIG_USB_GOKU=m
# CONFIG_USB_GADGET_LH7A40X is not set
# CONFIG_USB_GADGET_OMAP is not set
# CONFIG_USB_GADGET_S3C2410 is not set
# CONFIG_USB_GADGET_AT91 is not set
# CONFIG_USB_GADGET_DUMMY_HCD is not set
# CONFIG_USB_GADGET_DUALSPEED is not set
# CONFIG_USB_ZERO is not set
CONFIG_USB_ETH=m
# CONFIG_USB_ETH_RNDIS is not set
# CONFIG_USB_GADGETFS is not set
# CONFIG_USB_FILE_STORAGE is not set
CONFIG_USB_G_SERIAL=m
# CONFIG_USB_MIDI_GADGET is not set
# CONFIG_MMC is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#

#
# LED Triggers
#
# CONFIG_LEDS_TRIGGERS is not set
CONFIG_INFINIBAND=m
CONFIG_INFINIBAND_USER_MAD=m
CONFIG_INFINIBAND_USER_ACCESS=m
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_MTHCA=m
CONFIG_INFINIBAND_MTHCA_DEBUG=y
# CONFIG_INFINIBAND_IPATH is not set
# CONFIG_INFINIBAND_AMSO1100 is not set
# CONFIG_INFINIBAND_CXGB3 is not set
# CONFIG_MLX4_INFINIBAND is not set
CONFIG_INFINIBAND_IPOIB=m
# CONFIG_INFINIBAND_IPOIB_CM is not set
CONFIG_INFINIBAND_IPOIB_DEBUG=y
# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
CONFIG_INFINIBAND_SRP=m
# CONFIG_INFINIBAND_ISER is not set
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
# CONFIG_RTC_INTF_SYSFS is not set
# CONFIG_RTC_INTF_PROC is not set
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_TEST=m

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
CONFIG_RTC_DRV_DS1672=y
CONFIG_RTC_DRV_MAX6900=m
CONFIG_RTC_DRV_RS5C372=m
CONFIG_RTC_DRV_ISL1208=y
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
CONFIG_RTC_DRV_M41T80=y
# CONFIG_RTC_DRV_M41T80_WDT is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_DRV_DS1553=m
CONFIG_RTC_DRV_STK17TA8=m
# CONFIG_RTC_DRV_DS1742 is not set
CONFIG_RTC_DRV_M48T86=m
# CONFIG_RTC_DRV_M48T59 is not set
CONFIG_RTC_DRV_V3020=m

#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
CONFIG_AUXDISPLAY=y
CONFIG_VIRTUALIZATION=y
# CONFIG_KVM is not set

#
# Userspace I/O
#
CONFIG_UIO=m
# CONFIG_UIO_CIF is not set

#
# Firmware Drivers
#
CONFIG_EDD=y
# CONFIG_DELL_RBU is not set
CONFIG_DCDBAS=m
CONFIG_DMIID=y

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
CONFIG_JFS_FS=y
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
# CONFIG_JFS_DEBUG is not set
CONFIG_JFS_STATISTICS=y
CONFIG_FS_POSIX_ACL=y
# CONFIG_XFS_FS is not set
CONFIG_GFS2_FS=y
# CONFIG_GFS2_FS_LOCKING_NOLOCK is not set
CONFIG_GFS2_FS_LOCKING_DLM=m
CONFIG_OCFS2_FS=y
# CONFIG_OCFS2_DEBUG_MASKLOG is not set
CONFIG_OCFS2_DEBUG_FS=y
# CONFIG_MINIX_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_INOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_DNOTIFY is not set
CONFIG_AUTOFS_FS=m
CONFIG_AUTOFS4_FS=y
CONFIG_FUSE_FS=m

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
# CONFIG_JOLIET is not set
# CONFIG_ZISOFS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_VMCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_CONFIGFS_FS=y

#
# Miscellaneous filesystems
#
CONFIG_ADFS_FS=m
CONFIG_ADFS_FS_RW=y
CONFIG_AFFS_FS=y
CONFIG_ECRYPT_FS=y
# CONFIG_HFS_FS is not set
CONFIG_HFSPLUS_FS=m
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
CONFIG_EFS_FS=m
CONFIG_CRAMFS=y
CONFIG_VXFS_FS=y
CONFIG_HPFS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_SYSV_FS is not set
CONFIG_UFS_FS=m
# CONFIG_UFS_FS_WRITE is not set
CONFIG_UFS_DEBUG=y
CONFIG_NETWORK_FILESYSTEMS=y
# CONFIG_NFS_FS is not set
# CONFIG_NFSD is not set
# CONFIG_SMB_FS is not set
CONFIG_CIFS=y
# CONFIG_CIFS_STATS is not set
CONFIG_CIFS_WEAK_PW_HASH=y
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
CONFIG_CIFS_DEBUG2=y
CONFIG_CIFS_EXPERIMENTAL=y
CONFIG_CIFS_UPCALL=y
CONFIG_NCP_FS=y
# CONFIG_NCPFS_PACKET_SIGNING is not set
# CONFIG_NCPFS_IOCTL_LOCKING is not set
# CONFIG_NCPFS_STRONG is not set
CONFIG_NCPFS_NFS_NS=y
CONFIG_NCPFS_OS2_NS=y
# CONFIG_NCPFS_SMALLDOS is not set
# CONFIG_NCPFS_NLS is not set
# CONFIG_NCPFS_EXTRAS is not set
# CONFIG_CODA_FS is not set
CONFIG_AFS_FS=y
# CONFIG_AFS_DEBUG is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=y
CONFIG_NLS_CODEPAGE_775=y
CONFIG_NLS_CODEPAGE_850=m
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=y
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
CONFIG_NLS_CODEPAGE_869=m
# CONFIG_NLS_CODEPAGE_936 is not set
CONFIG_NLS_CODEPAGE_950=y
CONFIG_NLS_CODEPAGE_932=y
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
CONFIG_NLS_ISO8859_8=y
CONFIG_NLS_CODEPAGE_1250=m
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=y
CONFIG_NLS_ISO8859_3=y
CONFIG_NLS_ISO8859_4=y
CONFIG_NLS_ISO8859_5=y
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=y
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=y
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set
CONFIG_INSTRUMENTATION=y
# CONFIG_PROFILING is not set
CONFIG_KPROBES=y
CONFIG_MARKERS=y

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_FS=y
CONFIG_HEADERS_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_SAMPLES is not set
CONFIG_EARLY_PRINTK=y

#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_DEBUG_PROC_KEYS=y
CONFIG_SECURITY=y
# CONFIG_SECURITY_NETWORK is not set
CONFIG_SECURITY_CAPABILITIES=y
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
# CONFIG_SECURITY_ROOTPLUG is not set
CONFIG_XOR_BLOCKS=y
CONFIG_ASYNC_CORE=y
CONFIG_ASYNC_MEMCPY=y
CONFIG_ASYNC_XOR=y
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ABLKCIPHER=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=y
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_PCBC=y
CONFIG_CRYPTO_LRW=y
CONFIG_CRYPTO_XTS=y
CONFIG_CRYPTO_CRYPTD=y
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_BLOWFISH=m
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_X86_64 is not set
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_X86_64=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_TEA=y
CONFIG_CRYPTO_ARC4=y
CONFIG_CRYPTO_KHAZAD=y
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_MICHAEL_MIC=y
CONFIG_CRYPTO_CRC32C=y
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_HW is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
CONFIG_CRC7=m
CONFIG_LIBCRC32C=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Ingo Molnar <mingo@elte.hu> wrote:

> > > Ingo, in the absense of further complaints, could you please push 
> > > to the x86 tree?
> > 
> > yeah, i've added them.
> 
> the patches cause a spontaneous reboot on x86 64-bit, around the time 
> when bootup hits user-space. It's due to one of the 25 patches from 
> you today. Config attached.

likely caused by this patch:

  Subject: unify non-paravirt parts of desc.h

_please_ be more careful when unifying. Do check the before/after 
vmlinux - the binary size at least. And watch out for compiler warnings 
as well:

 arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
 arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type

i've pulled the patches from the tree for now.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Ingo Molnar <mingo@elte.hu> wrote:

> > > Ingo, in the absense of further complaints, could you please push 
> > > to the x86 tree?
> > 
> > yeah, i've added them.
> 
> the patches cause a spontaneous reboot on x86 64-bit, around the time 
> when bootup hits user-space. It's due to one of the 25 patches from 
> you today. Config attached.

likely caused by this patch:

  Subject: unify non-paravirt parts of desc.h

_please_ be more careful when unifying. Do check the before/after 
vmlinux - the binary size at least. And watch out for compiler warnings 
as well:

 arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
 arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type

i've pulled the patches from the tree for now.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
>>>> Ingo, in the absense of further complaints, could you please push 
>>>> to the x86 tree?
>>> yeah, i've added them.
>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>> when bootup hits user-space. It's due to one of the 25 patches from 
>> you today. Config attached.
> 
> likely caused by this patch:
> 
>   Subject: unify non-paravirt parts of desc.h
> 
> _please_ be more careful when unifying. Do check the before/after 
> vmlinux - the binary size at least. And watch out for compiler warnings 
> as well:
> 
>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type
I saw this warning, and this was fixed in the patch that follows. But 
yeah, I could have done a separate one, to avoid it. Do you have any 
other reason to believe this is the cause?

My box booted fine with the changes, but I'm re-verifying, and will send 
and update soon.

> i've pulled the patches from the tree for now.
Ok, I'll investigate it, meanwhile.

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Ingo Molnar wrote:
>> * Ingo Molnar <mingo@elte.hu> wrote:
>>
>>>>> Ingo, in the absense of further complaints, could you please push to 
>>>>> the x86 tree?
>>>> yeah, i've added them.
>>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>>> when bootup hits user-space. It's due to one of the 25 patches from you 
>>> today. Config attached.
>>
>> likely caused by this patch:
>>
>>   Subject: unify non-paravirt parts of desc.h
>>
>> _please_ be more careful when unifying. Do check the before/after vmlinux 
>> - the binary size at least. And watch out for compiler warnings as well:
>>
>>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type

> I saw this warning, and this was fixed in the patch that follows. But 
> yeah, I could have done a separate one, to avoid it. Do you have any 
> other reason to believe this is the cause?

that is bisection-unfriendly - every patch has to work.

> My box booted fine with the changes, but I'm re-verifying, and will 
> send and update soon.

please try the config i sent - does that boot fine on your box?

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Ingo Molnar wrote:
>> * Ingo Molnar <mingo@elte.hu> wrote:
>>
>>>>> Ingo, in the absense of further complaints, could you please push to 
>>>>> the x86 tree?
>>>> yeah, i've added them.
>>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>>> when bootup hits user-space. It's due to one of the 25 patches from you 
>>> today. Config attached.
>>
>> likely caused by this patch:
>>
>>   Subject: unify non-paravirt parts of desc.h
>>
>> _please_ be more careful when unifying. Do check the before/after vmlinux 
>> - the binary size at least. And watch out for compiler warnings as well:
>>
>>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type

> I saw this warning, and this was fixed in the patch that follows. But 
> yeah, I could have done a separate one, to avoid it. Do you have any 
> other reason to believe this is the cause?

that is bisection-unfriendly - every patch has to work.

> My box booted fine with the changes, but I'm re-verifying, and will 
> send and update soon.

please try the config i sent - does that boot fine on your box?

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Glauber de Oliveira Costa <gcosta@redhat.com> wrote:
> 
>> Ingo Molnar wrote:
>>> * Ingo Molnar <mingo@elte.hu> wrote:
>>>
>>>>>> Ingo, in the absense of further complaints, could you please push to 
>>>>>> the x86 tree?
>>>>> yeah, i've added them.
>>>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>>>> when bootup hits user-space. It's due to one of the 25 patches from you 
>>>> today. Config attached.
>>> likely caused by this patch:
>>>
>>>   Subject: unify non-paravirt parts of desc.h
>>>
>>> _please_ be more careful when unifying. Do check the before/after vmlinux 
>>> - the binary size at least. And watch out for compiler warnings as well:
>>>
>>>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>>>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type
> 
>> I saw this warning, and this was fixed in the patch that follows. But 
>> yeah, I could have done a separate one, to avoid it. Do you have any 
>> other reason to believe this is the cause?
> 
> that is bisection-unfriendly - every patch has to work.
I know, and I'm sorry. I thought it was not that bad, by being just a 
warning due to a type cast. ;-)
(famous last words, I know)

>> My box booted fine with the changes, but I'm re-verifying, and will 
>> send and update soon.
> 
> please try the config i sent - does that boot fine on your box?
No, it doesn't. I'll bisect it, and send an updated series, with your 3 
concerns addressed.

Re: [PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Glauber de Oliveira Costa <gcosta@redhat.com> wrote:
> 
>> Ingo Molnar wrote:
>>> * Ingo Molnar <mingo@elte.hu> wrote:
>>>
>>>>>> Ingo, in the absense of further complaints, could you please push to 
>>>>>> the x86 tree?
>>>>> yeah, i've added them.
>>>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>>>> when bootup hits user-space. It's due to one of the 25 patches from you 
>>>> today. Config attached.
>>> likely caused by this patch:
>>>
>>>   Subject: unify non-paravirt parts of desc.h
>>>
>>> _please_ be more careful when unifying. Do check the before/after vmlinux 
>>> - the binary size at least. And watch out for compiler warnings as well:
>>>
>>>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>>>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type
> 
>> I saw this warning, and this was fixed in the patch that follows. But 
>> yeah, I could have done a separate one, to avoid it. Do you have any 
>> other reason to believe this is the cause?
> 
> that is bisection-unfriendly - every patch has to work.
I know, and I'm sorry. I thought it was not that bad, by being just a 
warning due to a type cast. ;-)
(famous last words, I know)

>> My box booted fine with the changes, but I'm re-verifying, and will 
>> send and update soon.
> 
> please try the config i sent - does that boot fine on your box?
No, it doesn't. I'll bisect it, and send an updated series, with your 3 
concerns addressed.

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

before i pulled the patches i narrowed the problem down to one of the 
last ~6 patches in your 25-patch series. I couldnt continue bisecting it 
when i saw that process_64.c warning.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Ingo Molnar]

before i pulled the patches i narrowed the problem down to one of the 
last ~6 patches in your 25-patch series. I couldnt continue bisecting it 
when i saw that process_64.c warning.

	Ingo

Re: [PATCH 0/19] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
>>>> Ingo, in the absense of further complaints, could you please push 
>>>> to the x86 tree?
>>> yeah, i've added them.
>> the patches cause a spontaneous reboot on x86 64-bit, around the time 
>> when bootup hits user-space. It's due to one of the 25 patches from 
>> you today. Config attached.
> 
> likely caused by this patch:
> 
>   Subject: unify non-paravirt parts of desc.h
> 
> _please_ be more careful when unifying. Do check the before/after 
> vmlinux - the binary size at least. And watch out for compiler warnings 
> as well:
> 
>  arch/x86/kernel/process_64.c: In function 'read_32bit_tls':
>  arch/x86/kernel/process_64.c:454: warning: passing argument 1 of 'get_desc_base' from incompatible pointer type
I saw this warning, and this was fixed in the patch that follows. But 
yeah, I could have done a separate one, to avoid it. Do you have any 
other reason to believe this is the cause?

My box booted fine with the changes, but I'm re-verifying, and will send 
and update soon.

> i've pulled the patches from the tree for now.
Ok, I'll investigate it, meanwhile.

Re: [PATCH 0/19] desc_struct integration

[H. Peter Anvin]

Glauber de Oliveira Costa wrote:
> Since the last version of it received no comments on the interfaces, here
> it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the #defines in
> the desc_struct definition were merged. I also implemented the vmi
> functions,
> missing last time.
> 
> Ingo, in the absense of further complaints, could you please push to the
> x86 tree?
> 

Looks fine to me...

	-hpa

Re: [PATCH 0/19] desc_struct integration

[H. Peter Anvin]

Glauber de Oliveira Costa wrote:
> Since the last version of it received no comments on the interfaces, here
> it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the #defines in
> the desc_struct definition were merged. I also implemented the vmi
> functions,
> missing last time.
> 
> Ingo, in the absense of further complaints, could you please push to the
> x86 tree?
> 

Looks fine to me...

	-hpa

[PATCH 0/19 - v3] desc_struct integration

[Glauber de Oliveira Costa]

Here it goes a new version of the patchset.

It addresses the problems raised, namely:
* it does not harm make headers_check anymore. (fill_ldt is moved to desc.h)
* it fixes the x86_64 spontaneous boot problem
* it does not have a warning at get_desc_base() anymore.

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/ldt.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/ldt.c
+++ linux-2.6-x86/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, u
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct 
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struc
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,34 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#ifndef __ASSEMBLY__
+#include <asm/desc_defs.h>
+#include <asm/ldt.h>
+
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#endif

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/ldt.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/ldt.c
+++ linux-2.6-x86/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, u
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct 
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struc
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,34 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#ifndef __ASSEMBLY__
+#include <asm/desc_defs.h>
+#include <asm/ldt.h>
+
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#endif

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -4,6 +4,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
+#include <asm/mmu.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -23,7 +24,8 @@ static inline void fill_ldt(struct desc_
 	desc->base2 = (info->base_addr & 0xff000000) >> 24;
 }
 
-#endif
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
@@ -31,4 +33,65 @@ static inline void fill_ldt(struct desc_
 # include "desc_64.h"
 #endif
 
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,36 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
 static inline unsigned long get_desc_base(unsigned long *desc)
 {
 	unsigned long base;
@@ -210,30 +176,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,32 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
 static inline unsigned long get_desc_base(const void *ptr)
 {
 	const u32 *desc = ptr;
@@ -199,7 +165,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -4,6 +4,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
+#include <asm/mmu.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -23,7 +24,8 @@ static inline void fill_ldt(struct desc_
 	desc->base2 = (info->base_addr & 0xff000000) >> 24;
 }
 
-#endif
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
@@ -31,4 +33,65 @@ static inline void fill_ldt(struct desc_
 # include "desc_64.h"
 #endif
 
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,36 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
 static inline unsigned long get_desc_base(unsigned long *desc)
 {
 	unsigned long base;
@@ -210,30 +176,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,32 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
 static inline unsigned long get_desc_base(const void *ptr)
 {
 	const u32 *desc = ptr;
@@ -199,7 +165,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.
This is done at both i386 and x86_64, and then it is moved
to common header

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struc
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
Index: linux-2.6-x86/arch/x86/mm/fault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/mm/fault_32.c
+++ linux-2.6-x86/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -69,6 +69,11 @@ static inline void load_LDT(mm_context_t
 	preempt_enable();
 }
 
+static inline unsigned long get_desc_base(struct desc_struct *desc)
+{
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
+}
+
 #else
 /*
  * GET_DESC_BASE reads the descriptor base of the specified segment.
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -168,14 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -156,15 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.
This is done at both i386 and x86_64, and then it is moved
to common header

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struc
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
Index: linux-2.6-x86/arch/x86/mm/fault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/mm/fault_32.c
+++ linux-2.6-x86/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -69,6 +69,11 @@ static inline void load_LDT(mm_context_t
 	preempt_enable();
 }
 
+static inline unsigned long get_desc_base(struct desc_struct *desc)
+{
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
+}
+
 #else
 /*
  * GET_DESC_BASE reads the descriptor base of the specified segment.
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -168,14 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -156,15 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,6 +5,7 @@
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -27,6 +28,174 @@ static inline void fill_ldt(struct desc_
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d,
+					 unsigned long tss, unsigned type,
+					 unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
+#endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,6 +5,7 @@
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -27,6 +28,174 @@ static inline void fill_ldt(struct desc_
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void set_tssldt_descriptor(struct ldttss_desc64 *d,
+					 unsigned long tss, unsigned type,
+					 unsigned size)
+{
+	memset(d, 0, sizeof(*d));
+	d->limit0 = size & 0xFFFF;
+	d->base0 = PTR_LOW(tss);
+	d->base1 = PTR_MIDDLE(tss) & 0xFF;
+	d->type = type;
+	d->p = 1;
+	d->limit1 = (size >> 16) & 0xF;
+	d->base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+	d->base3 = PTR_HIGH(tss);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
+			   unsigned size)
+{
+
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(ldt,
+			     addr, DESC_LDT, size);
+#else
+		pack_descriptor(ldt, (unsigned long)addr,
+				size,
+				0x80 | DESC_LDT, 0);
+#endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		pack_ldt(&ldt, (unsigned long)addr,
+				entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -33,6 +33,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -43,6 +59,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -242,6 +268,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };
 

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -165,6 +165,39 @@ static inline void pack_ldt(ldt_desc *ld
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -222,12 +255,6 @@ static inline void native_load_tls(struc
 		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -1,34 +1 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
 
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -165,6 +165,39 @@ static inline void pack_ldt(ldt_desc *ld
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+			   unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+		set_tssldt_descriptor(tss,
+			     addr, entry, size);
+#else
+		pack_descriptor(tss, (unsigned long)addr,
+				size,
+				0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	pack_tss(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -222,12 +255,6 @@ static inline void native_load_tls(struc
 		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -1,34 +1 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
 
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

Re: [PATCH 19/19] unify set_tss_desc

[Andi Kleen]

> +static inline void pack_tss(tss_desc *tss, unsigned long addr,
> +			   unsigned size, unsigned entry)
> +{
> +#ifdef CONFIG_X86_64
> +		set_tssldt_descriptor(tss,
> +			     addr, entry, size);
> +#else
> +		pack_descriptor(tss, (unsigned long)addr,
> +				size,
> +				0x80 | entry, 0);

It would be better if you just unified that first instead of ifdef'ing.
I guess i386 could get a set_tssldt_descriptor() like wrapper
around pack_descriptor(). 

-Andi

Re: [PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

Andi Kleen wrote:
>> +static inline void pack_tss(tss_desc *tss, unsigned long addr,
>> +			   unsigned size, unsigned entry)
>> +{
>> +#ifdef CONFIG_X86_64
>> +		set_tssldt_descriptor(tss,
>> +			     addr, entry, size);
>> +#else
>> +		pack_descriptor(tss, (unsigned long)addr,
>> +				size,
>> +				0x80 | entry, 0);
> 
> It would be better if you just unified that first instead of ifdef'ing.
> I guess i386 could get a set_tssldt_descriptor() like wrapper
> around pack_descriptor(). 
Good point.

Thanks, Andi.

Re: [PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

Andi Kleen wrote:
>> +static inline void pack_tss(tss_desc *tss, unsigned long addr,
>> +			   unsigned size, unsigned entry)
>> +{
>> +#ifdef CONFIG_X86_64
>> +		set_tssldt_descriptor(tss,
>> +			     addr, entry, size);
>> +#else
>> +		pack_descriptor(tss, (unsigned long)addr,
>> +				size,
>> +				0x80 | entry, 0);
> 
> It would be better if you just unified that first instead of ifdef'ing.
> I guess i386 could get a set_tssldt_descriptor() like wrapper
> around pack_descriptor(). 
Good point.

Thanks, Andi.

Re: [PATCH 19/19] unify set_tss_desc

[Andi Kleen]

> +static inline void pack_tss(tss_desc *tss, unsigned long addr,
> +			   unsigned size, unsigned entry)
> +{
> +#ifdef CONFIG_X86_64
> +		set_tssldt_descriptor(tss,
> +			     addr, entry, size);
> +#else
> +		pack_descriptor(tss, (unsigned long)addr,
> +				size,
> +				0x80 | entry, 0);

It would be better if you just unified that first instead of ifdef'ing.
I guess i386 could get a set_tssldt_descriptor() like wrapper
around pack_descriptor(). 

-Andi

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -33,6 +33,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -43,6 +59,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -242,6 +268,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 0/19 -v4] desc_struct integration

[Glauber de Oliveira Costa]

Since the last version of it received no comments on the interfaces, here
it goes a version, that I feel ready for inclusion.

The comments regarding style, specially the elimination of the #defines in
the desc_struct definition were merged. I also implemented the vmi
functions,
missing last time.

Ingo, in the absense of further complaints, could you please push to the
x86 tree?

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

[PATCH 01/19] unify desc_struct

[Glauber de Oliveira Costa]

This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/apm_32.c       |    2 +-
 arch/x86/kernel/cpu/common.c   |   28 ++++++++++++++--------------
 arch/x86/kernel/process_64.c   |    2 +-
 arch/x86/kernel/traps_32.c     |    2 +-
 include/asm-x86/desc_defs.h    |   25 +++++++++++++++++--------
 include/asm-x86/lguest.h       |    4 ++--
 include/asm-x86/processor_32.h |    5 +----
 7 files changed, 37 insertions(+), 31 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/apm_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/apm_32.c
+++ linux-2.6-x86/arch/x86/kernel/apm_32.c
@@ -405,7 +405,7 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitq
 static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
 static struct apm_user *	user_list;
 static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
+static const struct desc_struct	bad_bios_desc = { { { 0, 0x00409200 } } };
 
 static const char		driver_version[] = "1.16ac";	/* no spaces */
 
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -22,31 +22,38 @@
 #include "cpu.h"
 
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
-	[GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
-	[GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
-	[GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
-	[GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
 	/*
 	 * Segments used for calling PnP BIOS have byte granularity.
 	 * They code segments and data segments have fixed 64k limits,
 	 * the transfer segment sizes are set at run time.
 	 */
-	[GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
-	[GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
-	[GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
-	[GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
+	/* 32-bit code */
+	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
+	/* 16-bit code */
+	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
+	/* 16-bit data */
+	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
 	/*
 	 * The APM segments have byte granularity and their bases
 	 * are set at run time.  All have 64k limits.
 	 */
-	[GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+	/* 32-bit code */
+	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
 	/* 16-bit code */
-	[GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
-	[GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
+	/* data */
+	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
 
-	[GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
-	[GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
+	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -444,7 +444,7 @@ static inline void set_32bit_tls(struct 
 		.limit_in_pages = 1,
 		.useable = 1,
 	};
-	struct n_desc_struct *desc = (void *)t->thread.tls_array;
+	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
 	desc->a = LDT_entry_a(&ud);
 	desc->b = LDT_entry_b(&ud);
Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -76,7 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
+struct desc_struct idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -11,17 +11,26 @@
 
 #include <linux/types.h>
 
+/*
+ * FIXME: Acessing the desc_struct through its fields is more elegant,
+ * and should be the one valid thing to do. However, a lot of open code
+ * still touches the a and b acessors, and doing this allow us to do it
+ * incrementally. We keep the signature as a struct, rather than an union,
+ * so we can get rid of it transparently in the future -- glommer
+ */
 // 8 byte segment descriptor
 struct desc_struct {
-	u16 limit0;
-	u16 base0;
-	unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
-	unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
-} __attribute__((packed));
+	union {
+		struct { unsigned int a, b; };
+		struct {
+			u16 limit0;
+			u16 base0;
+			unsigned base1: 8, type: 4, s: 1, dpl: 2, p: 1;
+			unsigned limit: 4, avl: 1, l: 1, d: 1, g: 1, base2: 8;
+		};
 
-struct n_desc_struct {
-	unsigned int a,b;
-};
+	};
+} __attribute__((packed));
 
 enum {
 	GATE_INTERRUPT = 0xE,
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -78,8 +78,8 @@ static inline void lguest_set_ts(void)
 }
 
 /* Full 4G segment descriptors, suitable for CS and DS. */
-#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
-#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
+#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
+#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
 
 #endif /* __ASSEMBLY__ */
 
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -20,14 +20,11 @@
 #include <linux/cpumask.h>
 #include <linux/init.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 /* flag for disabling the tsc */
 extern int tsc_disable;
 
-struct desc_struct {
-	unsigned long a,b;
-};
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 02/19] unify struct desc_ptr

[Glauber de Oliveira Costa]

This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/asm-offsets_32.c   |    5 ++---
 arch/x86/kernel/cpu/common.c       |    2 +-
 arch/x86/kernel/doublefault_32.c   |    2 +-
 arch/x86/kernel/efi_32.c           |    4 ++--
 arch/x86/kernel/machine_kexec_32.c |    4 ++--
 arch/x86/kernel/reboot_32.c        |    2 +-
 arch/x86/lguest/boot.c             |    4 ++--
 arch/x86/xen/enlighten.c           |   10 +++++-----
 drivers/kvm/svm.c                  |    2 +-
 include/asm-x86/desc_32.h          |   16 +++++-----------
 include/asm-x86/lguest.h           |    8 ++++----
 include/asm-x86/paravirt.h         |   18 +++++++++---------
 include/asm-x86/processor_32.h     |    2 +-
 include/asm-x86/suspend_32.h       |    4 ++--
 14 files changed, 38 insertions(+), 45 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/asm-offsets_32.c
+++ linux-2.6-x86/arch/x86/kernel/asm-offsets_32.c
@@ -70,9 +70,8 @@ void foo(void)
 	OFFSET(TI_cpu, thread_info, cpu);
 	BLANK();
 
-	OFFSET(GDS_size, Xgt_desc_struct, size);
-	OFFSET(GDS_address, Xgt_desc_struct, address);
-	OFFSET(GDS_pad, Xgt_desc_struct, pad);
+	OFFSET(GDS_size, desc_ptr, size);
+	OFFSET(GDS_address, desc_ptr, address);
 	BLANK();
 
 	OFFSET(PT_EBX, pt_regs, bx);
Index: linux-2.6-x86/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6-x86/arch/x86/kernel/cpu/common.c
@@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(str
  * it's on the real one. */
 void switch_to_new_gdt(void)
 {
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/doublefault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/doublefault_32.c
+++ linux-2.6-x86/arch/x86/kernel/doublefault_32.c
@@ -17,7 +17,7 @@ static unsigned long doublefault_stack[D
 
 static void doublefault_fn(void)
 {
-	struct Xgt_desc_struct gdt_desc = {0, 0};
+	struct desc_ptr gdt_desc = {0, 0};
 	unsigned long gdt, tss;
 
 	store_gdt(&gdt_desc);
Index: linux-2.6-x86/arch/x86/kernel/efi_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/efi_32.c
+++ linux-2.6-x86/arch/x86/kernel/efi_32.c
@@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) _
 {
 	unsigned long cr4;
 	unsigned long temp;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	spin_lock(&efi_rt_lock);
 	local_irq_save(efi_rt_eflags);
@@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) _
 static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
 {
 	unsigned long cr4;
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
Index: linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/machine_kexec_32.c
+++ linux-2.6-x86/arch/x86/kernel/machine_kexec_32.c
@@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED
 
 static void set_idt(void *newidt, __u16 limit)
 {
-	struct Xgt_desc_struct curidt;
+	struct desc_ptr curidt;
 
 	/* ia32 supports unaliged loads & stores */
 	curidt.size    = limit;
@@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 
 
 static void set_gdt(void *newgdt, __u16 limit)
 {
-	struct Xgt_desc_struct curgdt;
+	struct desc_ptr curgdt;
 
 	/* ia32 supports unaligned loads & stores */
 	curgdt.size    = limit;
Index: linux-2.6-x86/arch/x86/kernel/reboot_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/reboot_32.c
+++ linux-2.6-x86/arch/x86/kernel/reboot_32.c
@@ -161,7 +161,7 @@ real_mode_gdt_entries [3] =
 	0x000092000100ffffULL	/* 16-bit real-mode 64k data at 0x00000100 */
 };
 
-static struct Xgt_desc_struct
+static struct desc_ptr
 real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries },
 real_mode_idt = { 0x3ff, 0 },
 no_idt = { 0, 0 };
Index: linux-2.6-x86/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/lguest/boot.c
+++ linux-2.6-x86/arch/x86/lguest/boot.c
@@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struc
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
  * time it is written, so we can simply loop through all entries and tell the
  * Host about them. */
-static void lguest_load_idt(const struct Xgt_desc_struct *desc)
+static void lguest_load_idt(const struct desc_ptr *desc)
 {
 	unsigned int i;
 	struct desc_struct *idt = (void *)desc->address;
@@ -252,7 +252,7 @@ static void lguest_load_idt(const struct
  * hypercall and use that repeatedly to load a new IDT.  I don't think it
  * really matters, but wouldn't it be nice if they were the same?
  */
-static void lguest_load_gdt(const struct Xgt_desc_struct *desc)
+static void lguest_load_gdt(const struct desc_ptr *desc)
 {
 	BUG_ON((desc->size+1)/8 != GDT_ENTRIES);
 	hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0);
Index: linux-2.6-x86/arch/x86/xen/enlighten.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/xen/enlighten.c
+++ linux-2.6-x86/arch/x86/xen/enlighten.c
@@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
+static void xen_load_gdt(const struct desc_ptr *dtr)
 {
 	unsigned long *frames;
 	unsigned long va = dtr->address;
@@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, 
 }
 
 /* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
+static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
@@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct d
 	preempt_enable();
 }
 
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
+static void xen_convert_trap_info(const struct desc_ptr *desc,
 				  struct trap_info *traps)
 {
 	unsigned in, out, count;
@@ -446,7 +446,7 @@ static void xen_convert_trap_info(const 
 
 void xen_copy_trap_info(struct trap_info *traps)
 {
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
+	const struct desc_ptr *desc = &__get_cpu_var(idt_desc);
 
 	xen_convert_trap_info(desc, traps);
 }
@@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info
 /* Load a new IDT into Xen.  In principle this can be per-CPU, so we
    hold a spinlock to protect the static traps[] array (static because
    it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
+static void xen_load_idt(const struct desc_ptr *desc)
 {
 	static DEFINE_SPINLOCK(lock);
 	static struct trap_info traps[257];
Index: linux-2.6-x86/drivers/kvm/svm.c
===================================================================
--- linux-2.6-x86.orig/drivers/kvm/svm.c
+++ linux-2.6-x86/drivers/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *ga
 #ifdef CONFIG_X86_64
 	struct desc_ptr gdt_descr;
 #else
-	struct Xgt_desc_struct gdt_descr;
+	struct desc_ptr gdt_descr;
 #endif
 	struct desc_struct *gdt;
 	int me = raw_smp_processor_id();
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -12,12 +12,6 @@
 
 #include <asm/mmu.h>
 
-struct Xgt_desc_struct {
-	unsigned short size;
-	unsigned long address __attribute__((packed));
-	unsigned short pad;
-} __attribute__ ((packed));
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -29,7 +23,7 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct Xgt_desc_struct idt_descr;
+extern struct desc_ptr idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -107,22 +101,22 @@ static inline void native_load_tr_desc(v
 	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
 }
 
-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_gdt(const struct desc_ptr *dtr)
 {
 	asm volatile("lgdt %0"::"m" (*dtr));
 }
 
-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+static inline void native_load_idt(const struct desc_ptr *dtr)
 {
 	asm volatile("lidt %0"::"m" (*dtr));
 }
 
-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+static inline void native_store_gdt(struct desc_ptr *dtr)
 {
 	asm ("sgdt %0":"=m" (*dtr));
 }
 
-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+static inline void native_store_idt(struct desc_ptr *dtr)
 {
 	asm ("sidt %0":"=m" (*dtr));
 }
Index: linux-2.6-x86/include/asm-x86/lguest.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/lguest.h
+++ linux-2.6-x86/include/asm-x86/lguest.h
@@ -44,13 +44,13 @@ struct lguest_ro_state
 {
 	/* Host information we need to restore when we switch back. */
 	u32 host_cr3;
-	struct Xgt_desc_struct host_idt_desc;
-	struct Xgt_desc_struct host_gdt_desc;
+	struct desc_ptr host_idt_desc;
+	struct desc_ptr host_gdt_desc;
 	u32 host_sp;
 
 	/* Fields which are used when guest is running. */
-	struct Xgt_desc_struct guest_idt_desc;
-	struct Xgt_desc_struct guest_gdt_desc;
+	struct desc_ptr guest_idt_desc;
+	struct desc_ptr guest_gdt_desc;
 	struct i386_hw_tss guest_tss;
 	struct desc_struct guest_idt[IDT_ENTRIES];
 	struct desc_struct guest_gdt[GDT_ENTRIES];
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h
+++ linux-2.6-x86/include/asm-x86/paravirt.h
@@ -20,7 +20,7 @@
 
 struct page;
 struct thread_struct;
-struct Xgt_desc_struct;
+struct desc_ptr;
 struct tss_struct;
 struct mm_struct;
 struct desc_struct;
@@ -88,10 +88,10 @@ struct pv_cpu_ops {
 
 	/* Segment descriptor handling */
 	void (*load_tr_desc)(void);
-	void (*load_gdt)(const struct Xgt_desc_struct *);
-	void (*load_idt)(const struct Xgt_desc_struct *);
-	void (*store_gdt)(struct Xgt_desc_struct *);
-	void (*store_idt)(struct Xgt_desc_struct *);
+	void (*load_gdt)(const struct desc_ptr *);
+	void (*load_idt)(const struct desc_ptr *);
+	void (*store_gdt)(struct desc_ptr *);
+	void (*store_idt)(struct desc_ptr *);
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
@@ -630,11 +630,11 @@ static inline void load_TR_desc(void)
 {
 	PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
 }
-static inline void load_gdt(const struct Xgt_desc_struct *dtr)
+static inline void load_gdt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
 }
-static inline void load_idt(const struct Xgt_desc_struct *dtr)
+static inline void load_idt(const struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
 }
@@ -642,11 +642,11 @@ static inline void set_ldt(const void *a
 {
 	PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
 }
-static inline void store_gdt(struct Xgt_desc_struct *dtr)
+static inline void store_gdt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
 }
-static inline void store_idt(struct Xgt_desc_struct *dtr)
+static inline void store_idt(struct desc_ptr *dtr)
 {
 	PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
 }
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -707,7 +707,7 @@ extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
+extern struct desc_ptr early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
Index: linux-2.6-x86/include/asm-x86/suspend_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/suspend_32.h
+++ linux-2.6-x86/include/asm-x86/suspend_32.h
@@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(v
 struct saved_context {
   	u16 es, fs, gs, ss;
 	unsigned long cr0, cr2, cr3, cr4;
-	struct Xgt_desc_struct gdt;
-	struct Xgt_desc_struct idt;
+	struct desc_ptr gdt;
+	struct desc_ptr idt;
 	u16 ldt;
 	u16 tss;
 	unsigned long tr;

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 03/19] change gdt acessor macro name

[Glauber de Oliveira Costa]

This patch changes the name of x86_64 macro used to access the per-cpu
gdt. It is now equal to the i386 version, which will allow code to be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/setup64.c     |    2 +-
 arch/x86/kernel/suspend_64.c  |    2 +-
 arch/x86/kernel/vsyscall_64.c |    2 +-
 include/asm-x86/desc_64.h     |   10 +++++-----
 4 files changed, 8 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/setup64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/setup64.c
+++ linux-2.6-x86/arch/x86/kernel/setup64.c
@@ -228,7 +228,7 @@ void __cpuinit cpu_init (void)
 	 * and set up the GDT descriptor:
 	 */
 	if (cpu)
- 		memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
+		memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
 
 	cpu_gdt_descr[cpu].size = GDT_SIZE;
 	load_gdt((const struct desc_ptr *)&cpu_gdt_descr[cpu]);
Index: linux-2.6-x86/arch/x86/kernel/suspend_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/suspend_64.c
+++ linux-2.6-x86/arch/x86/kernel/suspend_64.c
@@ -118,7 +118,7 @@ void fix_processor_context(void)
 
 	set_tss_desc(cpu,t);	/* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
 
-	cpu_gdt(cpu)[GDT_ENTRY_TSS].type = 9;
+	get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
 
 	syscall_init();                         /* This sets MSR_*STAR and related */
 	load_TR_desc();				/* This does ltr */
Index: linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/vsyscall_64.c
+++ linux-2.6-x86/arch/x86/kernel/vsyscall_64.c
@@ -297,7 +297,7 @@ static void __cpuinit vsyscall_set_cpu(i
 	/* Store cpu number in limit so that it can be loaded quickly
 	   in user space in vgetcpu.
 	   12 bits for the CPU and 8 bits for the node. */
-	d = (unsigned long *)(cpu_gdt(cpu) + GDT_ENTRY_PER_CPU);
+	d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
 	*d = 0x0f40000000000ULL;
 	*d |= cpu;
 	*d |= (node & 0xf) << 12;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -48,7 +48,7 @@ static inline void write_ldt_entry(struc
 }
 
 /* the cpu gdt accessor */
-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
 
 static inline void load_gdt(const struct desc_ptr *ptr)
 {
@@ -141,15 +141,15 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
 static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
 {
-	set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
-			      DESC_LDT, size * 8 - 1);
+	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
 #define LDT_entry_a(info) \
@@ -183,7 +183,7 @@ static inline void set_ldt_desc(unsigned
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 06/19] change write_idt_entry signature

[Glauber de Oliveira Costa]

this patch changes write_idt_entry signature. It now takes a gate_desc
instead of the a and b parameters. It will allow it to be later unified
between i386 and x86_64.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   10 +++++++++-
 arch/x86/lguest/boot.c        |    9 +++++----
 arch/x86/xen/enlighten.c      |    8 ++++----
 include/asm-x86/desc_32.h     |   10 ++++++++--
 include/asm-x86/paravirt.h    |    9 +++++----
 6 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index f4e3a8e..13bbc99 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -381,7 +381,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
-	.write_idt_entry = write_dt_entry,
+	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 4cfda7d..a635b22 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,6 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
+	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -214,6 +215,12 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
+static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
+{
+	u32 *idt_entry = (u32 *)g;
+	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -792,7 +799,8 @@ static inline int __init activate_vmi(void)
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
-	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
+		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index aa0bdd5..b50c8ad 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -217,13 +217,14 @@ static void irq_enable(void)
  * address of the handler, and... well, who cares?  The Guest just asks the
  * Host to make the change anyway, because the Host controls the real IDT.
  */
-static void lguest_write_idt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_idt_entry(gate_desc *dt,
+				   int entrynum, const gate_desc *g)
 {
+	u32 *desc = (u32 *)g;
 	/* Keep the local copy up to date. */
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 	/* Tell Host about this new entry. */
-	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, low, high);
+	hcall(LHCALL_LOAD_IDT_ENTRY, entrynum, desc[0], desc[1]);
 }
 
 /* Changing to a different IDT is very rare: we keep the IDT up-to-date every
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8215ea6..6dd349e 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -399,8 +399,7 @@ static DEFINE_PER_CPU(struct desc_ptr, idt_desc);
 
 /* Set an IDT entry.  If the entry is part of the current IDT, then
    also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
 {
 	unsigned long p = (unsigned long)&dt[entrynum];
 	unsigned long start, end;
@@ -412,14 +411,15 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
 
 	xen_mc_flush();
 
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_idt_entry(dt, entrynum, g);
 
 	if (p >= start && (p + 8) <= end) {
 		struct trap_info info[2];
+		u32 *desc = (u32 *)g;
 
 		info[1].address = 0;
 
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
+		if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0]))
 			if (HYPERVISOR_set_trap_table(info))
 				BUG();
 	}
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 77f1e5a..54b2314 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -70,9 +70,15 @@ static inline void pack_gate(gate_desc *gate,
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -142,7 +148,7 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 {
 	gate_desc g;
 	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, g.a, g.b);
+	write_idt_entry(idt_table, gate, &g);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 0333fb6..86a9d7b 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <asm/kmap_types.h>
+#include <asm/desc_defs.h>
 
 struct page;
 struct thread_struct;
@@ -99,8 +100,8 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*write_idt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_idt_entry)(gate_desc *,
+				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
@@ -667,9 +668,9 @@ static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
 }
-static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high)
+static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_idt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
 }
 static inline void set_iopl_mask(unsigned mask)
 {
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/ldt.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/ldt.c
+++ linux-2.6-x86/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, u
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct 
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struc
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,34 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#ifndef __ASSEMBLY__
+#include <asm/desc_defs.h>
+#include <asm/ldt.h>
+
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#endif

[PATCH 09/19] introduce fill_ldt

[Glauber de Oliveira Costa]

This patch introduces fill_ldt(), which populates a ldt descriptor
from a user_desc in once, instead of relying in the LDT_entry_a and
LDT_entry_b macros

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c        |    3 +--
 arch/x86/kernel/process_64.c |    3 +--
 arch/x86/kernel/tls.c        |    7 +++----
 include/asm-x86/desc_32.h    |   15 ---------------
 include/asm-x86/desc_64.h    |   17 -----------------
 include/asm-x86/ldt.h        |   19 +++++++++++++++++++
 6 files changed, 24 insertions(+), 40 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/ldt.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/ldt.c
+++ linux-2.6-x86/arch/x86/kernel/ldt.c
@@ -223,8 +223,7 @@ static int write_ldt(void __user *ptr, u
 		}
 	}
 
-	ldt.a = LDT_entry_a(&ldt_info);
-	ldt.b = LDT_entry_b(&ldt_info);
+	fill_ldt(&ldt, &ldt_info);
 	if (oldmode)
 		ldt.avl = 0;
 
Index: linux-2.6-x86/arch/x86/kernel/process_64.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/process_64.c
+++ linux-2.6-x86/arch/x86/kernel/process_64.c
@@ -446,8 +446,7 @@ static inline void set_32bit_tls(struct 
 	};
 	struct desc_struct *desc = (void *)t->thread.tls_array;
 	desc += tls;
-	desc->a = LDT_entry_a(&ud);
-	desc->b = LDT_entry_b(&ud);
+	fill_ldt(desc, &ud);
 }
 
 static inline u32 read_32bit_tls(struct task_struct *t, int tls)
Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -67,10 +67,9 @@ int do_set_thread_area(struct task_struc
 	if (LDT_empty(&info)) {
 		desc[0] = 0;
 		desc[1] = 0;
-	} else {
-		desc[0] = LDT_entry_a(&info);
-		desc[1] = LDT_entry_b(&info);
-	}
+	} else
+		fill_ldt((struct desc_struct *)desc, &info);
+
 	if (t == &current->thread)
 		load_TLS(t, cpu);
 
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -163,21 +163,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -147,23 +147,6 @@ static inline void set_ldt_desc(unsigned
 			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
 }
 
-#define LDT_entry_a(info) \
-	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
-/* Don't allow setting of the lm bit. It is useless anyways because
-   64bit system calls require __USER_CS. */
-#define LDT_entry_b(info) \
-	(((info)->base_addr & 0xff000000) | \
-	(((info)->base_addr & 0x00ff0000) >> 16) | \
-	((info)->limit & 0xf0000) | \
-	(((info)->read_exec_only ^ 1) << 9) | \
-	((info)->contents << 10) | \
-	(((info)->seg_not_present ^ 1) << 15) | \
-	((info)->seg_32bit << 22) | \
-	((info)->limit_in_pages << 23) | \
-	((info)->useable << 20) | \
-	/* ((info)->lm << 21) | */ \
-	0x7000)
-
 #define LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -1,5 +1,34 @@
+#ifndef _ASM_DESC_H_
+#define _ASM_DESC_H_
+
+#ifndef __ASSEMBLY__
+#include <asm/desc_defs.h>
+#include <asm/ldt.h>
+
+static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+{
+	desc->limit0 = info->limit & 0x0ffff;
+	desc->base0 = info->base_addr & 0x0000ffff;
+
+	desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
+	desc->type = (info->read_exec_only ^ 1) << 1;
+	desc->type |= info->contents << 2;
+	desc->s = 1;
+	desc->dpl = 0x3;
+	desc->p = info->seg_not_present ^ 1;
+	desc->limit = (info->limit & 0xf0000) >> 16;
+	desc->avl = info->useable;
+	desc->d = info->seg_32bit;
+	desc->g = info->limit_in_pages;
+	desc->base2 = (info->base_addr & 0xff000000) >> 24;
+}
+
+#endif
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else
 # include "desc_64.h"
 #endif
+
+#endif

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

[PATCH 11/19] change write_gdt_entry signature.

[Glauber de Oliveira Costa]

This patch changes the write_gdt_entry function signature.
Instead of the old "a" and "b" parameters, it now receives
a pointer to a desc_struct, and the size of the entry being
handled. This is because x86_64 can have some 16-byte entries
as well as 8-byte ones.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/paravirt_32.c  |    2 +-
 arch/x86/kernel/smpcommon_32.c |    7 ++++---
 arch/x86/kernel/vmi_32.c       |   21 +++++++++++++++------
 arch/x86/lguest/boot.c         |    6 +++---
 arch/x86/xen/enlighten.c       |   11 +++++------
 include/asm-x86/desc_32.h      |   34 ++++++++++++++++++++++------------
 include/asm-x86/paravirt.h     |    9 ++++++---
 7 files changed, 56 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 13bbc99..77602c1 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -380,7 +380,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
 	.write_ldt_entry = write_dt_entry,
-	.write_gdt_entry = write_dt_entry,
+	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
 
diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c
index bbfe85a..8bc38af 100644
--- a/arch/x86/kernel/smpcommon_32.c
+++ b/arch/x86/kernel/smpcommon_32.c
@@ -14,10 +14,11 @@ __cpuinit void init_gdt(int cpu)
 {
 	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
 
-	pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
-			(u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+	pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
 			__per_cpu_offset[cpu], 0xFFFFF,
-			0x80 | DESCTYPE_S | 0x2, 0x8);
+			0x2 | DESCTYPE_S, 0x8);
+
+	gdt[GDT_ENTRY_PERCPU].s = 1;
 
 	per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
 	per_cpu(cpu_number, cpu) = cpu;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22..21edd0d 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
 static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
 {
 	if (gdt[nr].a != new->a || gdt[nr].b != new->b)
-		write_gdt_entry(gdt, nr, new->a, new->b);
+		write_gdt_entry(gdt, nr, new, 0);
 }
 
 static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
 static void vmi_set_ldt(const void *addr, unsigned entries)
 {
 	unsigned cpu = smp_processor_id();
-	u32 low, high;
+	struct desc_struct desc;
 
-	pack_descriptor(&low, &high, (unsigned long)addr,
+	pack_descriptor(&desc, (unsigned long)addr,
 			entries * sizeof(struct desc_struct) - 1,
-			DESCTYPE_LDT, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+			DESC_LDT, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
 	vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
 }
 
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 	vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
 }
 
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+				const void *desc, int type)
+{
+	u32 *gdt_entry = (u32 *)desc;
+	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
-	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
 		  write_idt_entry, WriteIDTEntry);
 	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index b50c8ad..a633737 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -262,10 +262,10 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
 /* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
  * then tell the Host to reload the entire thing.  This operation is so rare
  * that this naive implementation is reasonable. */
-static void lguest_write_gdt_entry(struct desc_struct *dt,
-				   int entrynum, u32 low, u32 high)
+static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
+				   const void *desc, int type)
 {
-	write_dt_entry(dt, entrynum, low, high);
+	native_write_gdt_entry(dt, entrynum, desc, type);
 	hcall(LHCALL_LOAD_GDT, __pa(dt), GDT_ENTRIES, 0);
 }
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 6dd349e..c38240c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -475,22 +475,21 @@ static void xen_load_idt(const struct desc_ptr *desc)
 /* Write a GDT descriptor entry.  Ignore LDT descriptors, since
    they're handled differently. */
 static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
+				const void *desc, int type)
 {
 	preempt_disable();
 
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
+	switch (type) {
+	case DESC_LDT:
+	case DESC_TSS:
 		/* ignore */
 		break;
 
 	default: {
 		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
 
 		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
+		if (HYPERVISOR_update_descriptor(maddr.maddr, *(u64 *)desc))
 			BUG();
 	}
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 0370099..41d8214 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -28,12 +28,13 @@ extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(__u32 *a, __u32 *b,
+static inline void pack_descriptor(struct desc_struct *desc,
 	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
 {
-	*a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	*b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+	desc->p = 1;
 }
 
 static inline void pack_gate(gate_desc *gate,
@@ -69,7 +70,8 @@ static inline void pack_gate(gate_desc *gate,
 #define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
@@ -79,6 +81,12 @@ static inline void native_write_idt_entry(gate_desc *idt, int entry,
 	memcpy(&idt[entry], gate, sizeof(*gate));
 }
 
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void write_dt_entry(struct desc_struct *dt,
 				  int entry, u32 entry_low, u32 entry_high)
 {
@@ -86,18 +94,20 @@ static inline void write_dt_entry(struct desc_struct *dt,
 	dt[entry].b = entry_high;
 }
 
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
 	else {
 		unsigned cpu = smp_processor_id();
-		__u32 a, b;
+		ldt_desc ldt;
 
-		pack_descriptor(&a, &b, (unsigned long)addr,
+		pack_descriptor(&ldt, (unsigned long)addr,
 				entries * sizeof(struct desc_struct) - 1,
-				DESCTYPE_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+				DESC_LDT, 0);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
 		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
 	}
 }
@@ -153,11 +163,11 @@ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned s
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
-	__u32 a, b;
-	pack_descriptor(&a, &b, (unsigned long)addr,
+	tss_desc tss;
+	pack_descriptor(&tss, (unsigned long)addr,
 			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESCTYPE_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+			DESC_TSS, 0);
+	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
 }
 
 
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 86a9d7b..3f2abf2 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -99,7 +99,7 @@ struct pv_cpu_ops {
 	void (*write_ldt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
 	void (*write_gdt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
 				int entrynum, const gate_desc *gate);
 	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
@@ -664,10 +664,13 @@ static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
 {
 	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
 }
-static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_gdt_entry(struct desc_struct *dt, int entry,
+				   void *desc, int type)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, low, high);
+	PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
 }
+
 static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
 {
 	PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
-- 
1.5.0.6

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 12/19] change write_ldt_entry signature

[Glauber de Oliveira Costa]

this patch changes the signature of write_ldt_entry.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
CC: Zachary Amsden <zach@vmware.com>
CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com>
---
 arch/x86/kernel/ldt.c         |    3 +--
 arch/x86/kernel/paravirt_32.c |    2 +-
 arch/x86/kernel/vmi_32.c      |   11 ++++++++++-
 arch/x86/xen/enlighten.c      |    4 ++--
 include/asm-x86/desc_32.h     |    9 ++++++++-
 include/asm-x86/desc_64.h     |    7 ++-----
 include/asm-x86/paravirt.h    |   10 ++++++----
 7 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 3e872b4..b8ef462 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
-			ldt.a, ldt.b);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
 	error = 0;
 
 out_unlock:
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 77602c1..dd063fb 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -379,7 +379,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.store_idt = native_store_idt,
 	.store_tr = native_store_tr,
 	.load_tls = native_load_tls,
-	.write_ldt_entry = write_dt_entry,
+	.write_ldt_entry = native_write_ldt_entry,
 	.write_gdt_entry = native_write_gdt_entry,
 	.write_idt_entry = native_write_idt_entry,
 	.load_sp0 = native_load_sp0,
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 21edd0d..10c4641 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -64,6 +64,7 @@ static struct {
 	void (*set_tr)(u32 selector);
 	void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
 	void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
+	void (*write_ldt_entry)(struct desc_struct *, int, u32, u32);
 	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
@@ -229,6 +230,13 @@ static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
 	vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
 }
 
+static void vmi_write_ldt_entry(struct desc_struct *dt, int entry,
+				const void *desc)
+{
+	u32 *ldt_entry = (u32 *)desc;
+	vmi_ops.write_idt_entry(dt, entry, ldt_entry[0], ldt_entry[2]);
+}
+
 static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
@@ -805,7 +813,8 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.store_idt, GetIDT);
 	para_fill(pv_cpu_ops.store_tr, GetTR);
 	pv_cpu_ops.load_tls = vmi_load_tls;
-	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+	para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry,
+		  write_ldt_entry, WriteLDTEntry);
 	para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
 		  write_gdt_entry, WriteGDTEntry);
 	para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c38240c..c904686 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
 }
 
 static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
+				const void *ptr)
 {
 	unsigned long lp = (unsigned long)&dt[entrynum];
 	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
+	u64 entry = *(u64 *)ptr;
 
 	preempt_disable();
 
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 41d8214..92a72b0 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -69,12 +69,19 @@ static inline void pack_gate(gate_desc *gate,
 #define load_TLS(t, cpu) native_load_tls(t, cpu)
 #define set_ldt native_set_ldt
 
-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
 #define write_gdt_entry(dt, entry, desc, type) \
 				native_write_gdt_entry(dt, entry, desc, type)
 #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
 #endif
 
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
+}
+
 static inline void native_write_idt_entry(gate_desc *idt, int entry,
 					  const gate_desc *gate)
 {
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index e0aa4bc..3cd5f10 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -34,12 +34,9 @@ extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, u32 entry_low, u32 entry_high)
+				   int entry, void *ptr)
 {
-	__u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
-
-	lp[0] = entry_low;
-	lp[1] = entry_high;
+	memcpy(&ldt[entry], ptr, 8);
 }
 
 /* the cpu gdt accessor */
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 3f2abf2..4f23f43 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -96,8 +96,8 @@ struct pv_cpu_ops {
 	void (*set_ldt)(const void *desc, unsigned entries);
 	unsigned long (*store_tr)(void);
 	void (*load_tls)(struct thread_struct *t, unsigned int cpu);
-	void (*write_ldt_entry)(struct desc_struct *,
-				int entrynum, u32 low, u32 high);
+	void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
+				const void *desc);
 	void (*write_gdt_entry)(struct desc_struct *,
 				int entrynum, const void *desc, int size);
 	void (*write_idt_entry)(gate_desc *,
@@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
 {
 	PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
 }
-static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
+
+static inline void write_ldt_entry(struct desc_struct *dt, int entry,
+				   const void *desc)
 {
-	PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
+	PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
 }
 
 static inline void write_gdt_entry(struct desc_struct *dt, int entry,
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 13/19] move constants to desc_defs.h

[Glauber de Oliveira Costa]

this patch moves constant definitions regarding descriptor types
from desc_32.h to desc_defs.h. The change from defines to enum
to comply with previous versions in desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_32.h   |    8 --------
 include/asm-x86/desc_defs.h |    5 +++++
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index 92a72b0..14238df 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -44,14 +44,6 @@ static inline void pack_gate(gate_desc *gate,
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
-#define DESCTYPE_TSS 	0x89	/* present, system, DPL-0, 32-bit TSS */
-#define DESCTYPE_TASK	0x85	/* present, system, DPL-0, task gate */
-#define DESCTYPE_INT	0x8e	/* present, system, DPL-0, interrupt gate */
-#define DESCTYPE_TRAP	0x8f	/* present, system, DPL-0, trap gate */
-#define DESCTYPE_DPL3	0x60	/* DPL-3 */
-#define DESCTYPE_S	0x10	/* !system */
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index c4d7874..5ca416d 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -55,6 +55,11 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
+	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
+	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
+	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
+	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
+	DESCTYPE_S =	0x10,	/* !system */
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-- 
1.5.0.6

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -4,6 +4,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
+#include <asm/mmu.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -23,7 +24,8 @@ static inline void fill_ldt(struct desc_
 	desc->base2 = (info->base_addr & 0xff000000) >> 24;
 }
 
-#endif
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
@@ -31,4 +33,65 @@ static inline void fill_ldt(struct desc_
 # include "desc_64.h"
 #endif
 
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,36 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
 static inline unsigned long get_desc_base(unsigned long *desc)
 {
 	unsigned long base;
@@ -210,30 +176,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,32 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
 static inline unsigned long get_desc_base(const void *ptr)
 {
 	const u32 *desc = ptr;
@@ -199,7 +165,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 14/19] unify non-paravirt parts of desc.h

[Glauber de Oliveira Costa]

This patch unifies the non-paravirt part of desc_{32,64}.h into
desc.h. Most of it, is simply common code, that is moved to
the shared header. The only exception is the set_ldt_desc in desc_64.h,
which is changed - included its name - to accomodate for the way
the ldt is set up in i386.

Also, constant definitions used in desc_32.h are moved to desc_defs.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h           |   87 ++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h        |   66 ----------------------------
 include/asm-x86/desc_64.h        |   64 ++++-----------------------
 include/asm-x86/mmu_context_64.h |    4 +-
 4 files changed, 99 insertions(+), 122 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -4,6 +4,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
+#include <asm/mmu.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -23,7 +24,8 @@ static inline void fill_ldt(struct desc_
 	desc->base2 = (info->base_addr & 0xff000000) >> 24;
 }
 
-#endif
+extern struct desc_ptr idt_descr;
+extern gate_desc idt_table[];
 
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
@@ -31,4 +33,65 @@ static inline void fill_ldt(struct desc_
 # include "desc_64.h"
 #endif
 
+#define _LDT_empty(info) (\
+	(info)->base_addr	== 0	&& \
+	(info)->limit		== 0	&& \
+	(info)->contents	== 0	&& \
+	(info)->read_exec_only	== 1	&& \
+	(info)->seg_32bit	== 0	&& \
+	(info)->limit_in_pages	== 0	&& \
+	(info)->seg_not_present	== 1	&& \
+	(info)->useable		== 0)
+
+#ifdef CONFIG_X86_64
+#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+#else
+#define LDT_empty(info) (_LDT_empty(info))
+#endif
+
+static inline void clear_LDT(void)
+{
+	set_ldt(NULL, 0);
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc)
+{
+	set_ldt(pc->ldt, pc->size);
+}
+
+static inline void load_LDT(mm_context_t *pc)
+{
+	preempt_disable();
+	load_LDT_nolock(pc);
+	preempt_enable();
+}
+
+#else
+/*
+ * GET_DESC_BASE reads the descriptor base of the specified segment.
+ *
+ * Args:
+ *    idx - descriptor index
+ *    gdt - GDT pointer
+ *    base - 32bit register to which the base will be written
+ *    lo_w - lo word of the "base" register
+ *    lo_b - lo byte of the "base" register
+ *    hi_b - hi byte of the low word of the "base" register
+ *
+ * Example:
+ *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+ *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+	movb idx*8+4(gdt), lo_b; \
+	movb idx*8+7(gdt), hi_b; \
+	shll $16, base; \
+	movw idx*8+2(gdt), lo_w;
+
+
+#endif /* __ASSEMBLY__ */
+
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -11,8 +11,6 @@
 #include <linux/smp.h>
 #include <linux/percpu.h>
 
-#include <asm/mmu.h>
-
 struct gdt_page
 {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -24,8 +22,6 @@ static inline struct desc_struct *get_cp
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-extern struct desc_ptr idt_descr;
-extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(struct desc_struct *desc,
@@ -172,36 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	)
-
-static inline void clear_LDT(void)
-{
-	set_ldt(NULL, 0);
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc)
-{
-	set_ldt(pc->ldt, pc->size);
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	preempt_disable();
-	load_LDT_nolock(pc);
-	preempt_enable();
-}
-
 static inline unsigned long get_desc_base(unsigned long *desc)
 {
 	unsigned long base;
@@ -210,30 +176,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
-#else /* __ASSEMBLY__ */
-
-/*
- * GET_DESC_BASE reads the descriptor base of the specified segment.
- *
- * Args:
- *    idx - descriptor index
- *    gdt - GDT pointer
- *    base - 32bit register to which the base will be written
- *    lo_w - lo word of the "base" register
- *    lo_b - lo byte of the "base" register
- *    hi_b - hi byte of the low word of the "base" register
- *
- * Example:
- *    GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
- *    Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
- */
-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
-	movb idx*8+4(gdt), lo_b; \
-	movb idx*8+7(gdt), hi_b; \
-	shll $16, base; \
-	movw idx*8+2(gdt), lo_w;
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -9,16 +9,13 @@
 
 #include <linux/string.h>
 #include <linux/smp.h>
-#include <asm/desc_defs.h>
 
 #include <asm/segment.h>
-#include <asm/mmu.h>
 
 extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
 
 #define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
 #define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-#define clear_LDT()  asm volatile("lldt %w0"::"r" (0))
 
 static inline unsigned long __store_tr(void)
 {
@@ -30,7 +27,6 @@ static inline unsigned long __store_tr(v
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -138,23 +134,19 @@ static inline void set_tss_desc(unsigned
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
 }
 
-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+static inline void set_ldt(void *addr, int entries)
 {
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, size * 8 - 1);
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+
+		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
+			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
 }
 
-#define LDT_empty(info) (\
-	(info)->base_addr	== 0	&& \
-	(info)->limit		== 0	&& \
-	(info)->contents	== 0	&& \
-	(info)->read_exec_only	== 1	&& \
-	(info)->seg_32bit	== 0	&& \
-	(info)->limit_in_pages	== 0	&& \
-	(info)->seg_not_present	== 1	&& \
-	(info)->useable		== 0	&& \
-	(info)->lm		== 0)
-
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
@@ -164,32 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
-	int count = pc->size;
-
-	if (likely(!count)) {
-		clear_LDT();
-		return;
-	}
-
-	set_ldt_desc(cpu, pc->ldt, count);
-	load_LDT_desc();
-}
-
-static inline void load_LDT(mm_context_t *pc)
-{
-	int cpu = get_cpu();
-
-	load_LDT_nolock(pc, cpu);
-	put_cpu();
-}
-
-extern struct desc_ptr idt_descr;
-
 static inline unsigned long get_desc_base(const void *ptr)
 {
 	const u32 *desc = ptr;
@@ -199,7 +165,6 @@ static inline unsigned long get_desc_bas
 		(desc[1] & 0xff000000);
 	return base;
 }
-
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/mmu_context_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/mmu_context_64.h
+++ linux-2.6-x86/include/asm-x86/mmu_context_64.h
@@ -43,7 +43,7 @@ static inline void switch_mm(struct mm_s
 		load_cr3(next->pgd);
 
 		if (unlikely(next->context.ldt != prev->context.ldt)) 
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 	}
 #ifdef CONFIG_SMP
 	else {
@@ -56,7 +56,7 @@ static inline void switch_mm(struct mm_s
 			 * to make sure to use no freed page tables.
 			 */
 			load_cr3(next->pgd);
-			load_LDT_nolock(&next->context, cpu);
+			load_LDT_nolock(&next->context);
 		}
 	}
 #endif

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 15/19] use the same data type for tls_array.

[Glauber de Oliveira Costa]

This patch changes the type of tls_array in x86_64 to
a desc_struct. Now, both i386 and x86_64 tls_array have
the same type, and code accessing it can be shared.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h      |    2 +-
 include/asm-x86/processor_64.h |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 2dc19e2..7fd9876 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -150,7 +150,7 @@ static inline void set_ldt(void *addr, int entries)
 static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
 {
 	unsigned int i;
-	u64 *gdt = (u64 *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
+	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
 
 	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
 		gdt[i] = t->tls_array[i];
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 8efdf99..51f1970 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <asm/processor-flags.h>
+#include <asm/desc_defs.h>
 
 #define TF_MASK		0x00000100
 #define IF_MASK		0x00000200
@@ -244,7 +245,7 @@ struct thread_struct {
  *               goes into MSR_IA32_DS_AREA */
 	unsigned long	ds_area_msr;
 /* cached TLS descriptors. */
-	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-- 
1.5.0.6

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.
This is done at both i386 and x86_64, and then it is moved
to common header

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struc
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
Index: linux-2.6-x86/arch/x86/mm/fault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/mm/fault_32.c
+++ linux-2.6-x86/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -69,6 +69,11 @@ static inline void load_LDT(mm_context_t
 	preempt_enable();
 }
 
+static inline unsigned long get_desc_base(struct desc_struct *desc)
+{
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
+}
+
 #else
 /*
  * GET_DESC_BASE reads the descriptor base of the specified segment.
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -168,14 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -156,15 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,6 +5,7 @@
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -27,6 +28,166 @@ static inline void fill_ldt(struct desc_
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+
+static inline void set_tssldt_descriptor(void *d, unsigned long addr,
+					 unsigned type, unsigned size)
+{
+#ifdef CONFIG_X86_64
+	struct ldttss_desc64 *desc = d;
+	memset(desc, 0, sizeof(*desc));
+	desc->limit0 = size & 0xFFFF;
+	desc->base0 = PTR_LOW(addr);
+	desc->base1 = PTR_MIDDLE(addr) & 0xFF;
+	desc->type = type;
+	desc->p = 1;
+	desc->limit1 = (size >> 16) & 0xF;
+	desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF;
+	desc->base3 = PTR_HIGH(addr);
+#else
+
+	pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0);
+#endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		set_tssldt_descriptor(&ldt, (unsigned long)addr,
+				      DESC_LDT, entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else

[PATCH 17/19] unify paravirt pieces of descriptor handling

[Glauber de Oliveira Costa]

With the types used to access descriptors in x86_64 and i386
now being the same, the code that effectively handles them can
now be easily shared. This patch moves the paravirt part of
desc_32.h into desc.h, and then, we get paravirt support in x86_64
for free.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h      |  169 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |  130 ---------------------------------
 include/asm-x86/desc_64.h   |  104 +++------------------------
 include/asm-x86/desc_defs.h |    6 +-
 4 files changed, 183 insertions(+), 226 deletions(-)

Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -8,31 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/preempt.h>
-#include <linux/smp.h>
 #include <linux/percpu.h>
 
-struct gdt_page
-{
-	struct desc_struct gdt[GDT_ENTRIES];
-} __attribute__((aligned(PAGE_SIZE)));
-DECLARE_PER_CPU(struct gdt_page, gdt_page);
-
-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
-{
-	return per_cpu(gdt_page, cpu).gdt;
-}
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 
-static inline void pack_descriptor(struct desc_struct *desc,
-	unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
-{
-	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
-	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
-		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
-	desc->p = 1;
-}
-
 static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
@@ -40,115 +19,6 @@ static inline void pack_gate(gate_desc *
 	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define load_TR_desc() native_load_tr_desc()
-#define load_gdt(dtr) native_load_gdt(dtr)
-#define load_idt(dtr) native_load_idt(dtr)
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
-
-#define store_gdt(dtr) native_store_gdt(dtr)
-#define store_idt(dtr) native_store_idt(dtr)
-#define store_tr(tr) (tr = native_store_tr())
-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
-
-#define load_TLS(t, cpu) native_load_tls(t, cpu)
-#define set_ldt native_set_ldt
-
-#define write_ldt_entry(dt, entry, desc) \
-				native_write_ldt_entry(dt, entry, desc)
-#define write_gdt_entry(dt, entry, desc, type) \
-				native_write_gdt_entry(dt, entry, desc, type)
-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
-#endif
-
-static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
-					  const void *desc)
-{
-	memcpy(&ldt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void native_write_idt_entry(gate_desc *idt, int entry,
-					  const gate_desc *gate)
-{
-	memcpy(&idt[entry], gate, sizeof(*gate));
-}
-
-static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
-					  const void *desc, int type)
-{
-	memcpy(&gdt[entry], desc, sizeof(struct desc_struct));
-}
-
-static inline void write_dt_entry(struct desc_struct *dt,
-				  int entry, u32 entry_low, u32 entry_high)
-{
-	dt[entry].a = entry_low;
-	dt[entry].b = entry_high;
-}
-
-
-static inline void native_set_ldt(const void *addr, unsigned int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-		ldt_desc ldt;
-
-		pack_descriptor(&ldt, (unsigned long)addr,
-				entries * sizeof(struct desc_struct) - 1,
-				DESC_LDT, 0);
-		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
-				&ldt, DESC_LDT);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-
-static inline void native_load_tr_desc(void)
-{
-	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
-}
-
-static inline void native_load_gdt(const struct desc_ptr *dtr)
-{
-	asm volatile("lgdt %0"::"m" (*dtr));
-}
-
-static inline void native_load_idt(const struct desc_ptr *dtr)
-{
-	asm volatile("lidt %0"::"m" (*dtr));
-}
-
-static inline void native_store_gdt(struct desc_ptr *dtr)
-{
-	asm ("sgdt %0":"=m" (*dtr));
-}
-
-static inline void native_store_idt(struct desc_ptr *dtr)
-{
-	asm ("sidt %0":"=m" (*dtr));
-}
-
-static inline unsigned long native_store_tr(void)
-{
-	unsigned long tr;
-	asm ("str %0":"=r" (tr));
-	return tr;
-}
-
-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
-}
-
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	gate_desc g;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -8,47 +8,10 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/string.h>
-#include <linux/smp.h>
 
 #include <asm/segment.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
-
-static inline unsigned long __store_tr(void)
-{
-       unsigned long tr;
-
-       asm volatile ("str %w0":"=r" (tr));
-       return tr;
-}
-
-#define store_tr(tr) (tr) = __store_tr()
-
-extern struct desc_ptr cpu_gdt_descr[];
-
-static inline void write_ldt_entry(struct desc_struct *ldt,
-				   int entry, void *ptr)
-{
-	memcpy(&ldt[entry], ptr, 8);
-}
-
-/* the cpu gdt accessor */
-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
-
-static inline void load_gdt(const struct desc_ptr *ptr)
-{
-	asm volatile("lgdt %w0"::"m" (*ptr));
-}
-
-static inline void store_gdt(struct desc_ptr *ptr)
-{
-       asm("sgdt %w0":"=m" (*ptr));
-}
-
-static inline void _set_gate(void *adr, unsigned type, unsigned long func,
+static inline void _set_gate(int gate, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
 	gate_desc s;
@@ -67,61 +30,37 @@ static inline void _set_gate(void *adr, 
 	 * does not need to be atomic because it is only done once at
 	 * setup time
 	 */
-	memcpy(adr, &s, 16);
+	write_idt_entry(idt_table, gate, &s);
 }
 
 static inline void set_intr_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
 }
 
 static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
 }
 
 static inline void set_system_gate(int nr, void *func)
 {
 	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
 }
 
 static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
 {
-	_set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
-static inline void load_idt(const struct desc_ptr *ptr)
-{
-	asm volatile("lidt %w0"::"m" (*ptr));
-}
-
-static inline void store_idt(struct desc_ptr *dtr)
-{
-       asm("sidt %w0":"=m" (*dtr));
-}
-
-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
-					 unsigned type, unsigned size)
-{
-	struct ldttss_desc64 d;
-
-	memset(&d, 0, sizeof(d));
-	d.limit0 = size & 0xFFFF;
-	d.base0 = PTR_LOW(tss);
-	d.base1 = PTR_MIDDLE(tss) & 0xFF;
-	d.type = type;
-	d.p = 1;
-	d.limit1 = (size >> 16) & 0xF;
-	d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
-	d.base3 = PTR_HIGH(tss);
-	memcpy(ptr, &d, 16);
+	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
 }
 
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
 	/*
 	 * sizeof(unsigned long) coming from an extra "long" at the end
 	 * of the iobitmap. See tss_struct definition in processor.h
@@ -129,31 +68,10 @@ static inline void set_tss_desc(unsigned
 	 * -1? seg base+limit should be pointing to the address of the
 	 * last valid byte
 	 */
-	set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS],
+	set_tssldt_descriptor(&tss,
 		(unsigned long)addr, DESC_TSS,
 		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-}
-
-static inline void set_ldt(void *addr, int entries)
-{
-	if (likely(entries == 0))
-		__asm__ __volatile__("lldt %w0"::"q" (0));
-	else {
-		unsigned cpu = smp_processor_id();
-
-		set_tssldt_descriptor(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT],
-			     (unsigned long)addr, DESC_LDT, entries * 8 - 1);
-		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
-	}
-}
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-	unsigned int i;
-	struct desc_struct *gdt = (get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN);
-
-	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
-		gdt[i] = t->tls_array[i];
+	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
 }
 
 #endif /* !__ASSEMBLY__ */
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -48,9 +48,9 @@ struct gate_struct64 {
 	u32 zero1;
 } __attribute__((packed));
 
-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+#define PTR_LOW(x) ((unsigned long long)(x) & 0xFFFF)
+#define PTR_MIDDLE(x) (((unsigned long long)(x) >> 16) & 0xFFFF)
+#define PTR_HIGH(x) ((unsigned long long)(x) >> 32)
 
 enum {
 	DESC_TSS = 0x9,
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -5,6 +5,7 @@
 #include <asm/desc_defs.h>
 #include <asm/ldt.h>
 #include <asm/mmu.h>
+#include <linux/smp.h>
 
 static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
 {
@@ -27,6 +28,166 @@ static inline void fill_ldt(struct desc_
 extern struct desc_ptr idt_descr;
 extern gate_desc idt_table[];
 
+#ifdef CONFIG_X86_64
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+extern struct desc_ptr cpu_gdt_descr[];
+/* the cpu gdt accessor */
+#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+#else
+struct gdt_page {
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+{
+	return per_cpu(gdt_page, cpu).gdt;
+}
+#endif
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
+#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
+#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
+
+#define write_ldt_entry(dt, entry, desc) \
+				native_write_ldt_entry(dt, entry, desc)
+#define write_gdt_entry(dt, entry, desc, type) \
+				native_write_gdt_entry(dt, entry, desc, type)
+#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
+#endif
+
+static inline void native_write_idt_entry(gate_desc *idt, int entry,
+					  const gate_desc *gate)
+{
+	memcpy(&idt[entry], gate, sizeof(*gate));
+}
+
+static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
+					  const void *desc)
+{
+	memcpy(&ldt[entry], desc, 8);
+}
+
+static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
+					  const void *desc, int type)
+{
+	unsigned int size;
+	switch (type) {
+	case DESC_TSS:
+		size = sizeof(tss_desc);
+		break;
+	case DESC_LDT:
+		size = sizeof(ldt_desc);
+		break;
+	default:
+		size = sizeof(struct desc_struct);
+		break;
+	}
+	memcpy(&gdt[entry], desc, size);
+}
+
+static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
+				   unsigned long limit, unsigned char type,
+				   unsigned char flags)
+{
+	desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+	desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+		  (limit & 0x000f0000) | ((type & 0xff) << 8) |
+		  ((flags & 0xf) << 20);
+	desc->p = 1;
+}
+
+
+static inline void set_tssldt_descriptor(void *d, unsigned long addr,
+					 unsigned type, unsigned size)
+{
+#ifdef CONFIG_X86_64
+	struct ldttss_desc64 *desc = d;
+	memset(desc, 0, sizeof(*desc));
+	desc->limit0 = size & 0xFFFF;
+	desc->base0 = PTR_LOW(addr);
+	desc->base1 = PTR_MIDDLE(addr) & 0xFF;
+	desc->type = type;
+	desc->p = 1;
+	desc->limit1 = (size >> 16) & 0xF;
+	desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF;
+	desc->base3 = PTR_HIGH(addr);
+#else
+
+	pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0);
+#endif
+}
+
+static inline void native_set_ldt(const void *addr, unsigned int entries)
+{
+	if (likely(entries == 0))
+		__asm__ __volatile__("lldt %w0"::"q" (0));
+	else {
+		unsigned cpu = smp_processor_id();
+		ldt_desc ldt;
+
+		set_tssldt_descriptor(&ldt, (unsigned long)addr,
+				      DESC_LDT, entries * sizeof(ldt) - 1);
+		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+				&ldt, DESC_LDT);
+		__asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+	}
+}
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct desc_ptr *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct desc_ptr *dtr)
+{
+	asm volatile("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct desc_ptr *dtr)
+{
+	asm volatile("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm volatile("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+
 #ifdef CONFIG_X86_32
 # include "desc_32.h"
 #else

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -33,6 +33,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -43,6 +59,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -234,6 +260,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };
 

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -157,6 +157,26 @@ static inline void set_tssldt_descriptor
 #endif
 }
 
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	set_tssldt_descriptor(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -214,12 +234,6 @@ static inline void native_load_tls(struc
 		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -1,34 +1 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
 
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

[PATCH 19/19] unify set_tss_desc

[Glauber de Oliveira Costa]

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc.h    |   40 +++++++++++++++++++++++++++++++++-------
 include/asm-x86/desc_32.h |   27 ---------------------------
 include/asm-x86/desc_64.h |   34 ----------------------------------
 3 files changed, 33 insertions(+), 68 deletions(-)
 delete mode 100644 include/asm-x86/desc_32.h
 delete mode 100644 include/asm-x86/desc_64.h

Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -157,6 +157,26 @@ static inline void set_tssldt_descriptor
 #endif
 }
 
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+	struct desc_struct *d = get_cpu_gdt_table(cpu);
+	tss_desc tss;
+
+	/*
+	 * sizeof(unsigned long) coming from an extra "long" at the end
+	 * of the iobitmap. See tss_struct definition in processor.h
+	 *
+	 * -1? seg base+limit should be pointing to the address of the
+	 * last valid byte
+	 */
+	set_tssldt_descriptor(&tss, (unsigned long)addr,
+		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+		DESC_TSS);
+	write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
@@ -214,12 +234,6 @@ static inline void native_load_tls(struc
 		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
 	(info)->base_addr	== 0	&& \
 	(info)->limit		== 0	&& \
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-	tss_desc tss;
-	pack_descriptor(&tss, (unsigned long)addr,
-			offsetof(struct tss_struct, __cacheline_filler) - 1,
-			DESC_TSS, 0);
-	write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -1,34 +1 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
 
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-	struct desc_struct *d = get_cpu_gdt_table(cpu);
-	tss_desc tss;
-
-	/*
-	 * sizeof(unsigned long) coming from an extra "long" at the end
-	 * of the iobitmap. See tss_struct definition in processor.h
-	 *
-	 * -1? seg base+limit should be pointing to the address of the
-	 * last valid byte
-	 */
-	set_tssldt_descriptor(&tss,
-		(unsigned long)addr, DESC_TSS,
-		IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif

Re: [PATCH 18/19] move _set_gate and its users to a common location

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> This patch moves _set_gate and its users to desc.h. We can now use 
> common code for x86_64 and i386.

a few days ago i started seeing weird crashes on 64-bit x86 in the 
random-kernel-bootup tests. Nothing truly reproducable to be bisectable, 
but quality of x86.git went down drastically. Double faults, triple 
faults, crashes all around the place, with every few dozen kernel 
bootups.

Today i found a config and a workload that triggered the crashes a bit 
more reliably. I still needed a 6 hours bisection marathon to pinpoint 
the patch - the one in this thread. A review of it with H. Peter Anvin 
pinpointed the breakage:

> +static inline void set_system_gate(unsigned int n, void *addr)
> +{
> +	BUG_ON((unsigned)n > 0xFF);
> +	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
> +}

> -static inline void set_system_gate(int nr, void *func)
> -{
> -	BUG_ON((unsigned)nr > 0xFF);
> -	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
> -}

you changed the type of system gates on 64-bit from GATE_INTERRUPT to 
GATE_TRAP. The effect of this is that these gates enter with interrupts 
enabled - instead of interrupts disabled. This, amongst others, affects 
the following key gate:

        set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);

which relies on disabled interrupts to fix up its stack. If an interrupt 
comes in the wrong moment then we get a kernel stack corruption that is 
not survivable.

the reason for this bug was that you tried to do too many changes in a 
single patch. You did a cleanup, you did unification and you moved code 
around. It was totally non-obvious what you did and the resulting patch 
was not reviewable at all - even after the bisection poinpointed the 
patch, it took us almost 30 minutes to figure out where the bug was. If 
this unstructured, careless mess of patches continues then we are not 
going to be able to accept any more 64-bit paravirt patches into 
x86.git.

	Ingo

Re: [PATCH 18/19] move _set_gate and its users to a common location

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> This patch moves _set_gate and its users to desc.h. We can now use 
> common code for x86_64 and i386.

a few days ago i started seeing weird crashes on 64-bit x86 in the 
random-kernel-bootup tests. Nothing truly reproducable to be bisectable, 
but quality of x86.git went down drastically. Double faults, triple 
faults, crashes all around the place, with every few dozen kernel 
bootups.

Today i found a config and a workload that triggered the crashes a bit 
more reliably. I still needed a 6 hours bisection marathon to pinpoint 
the patch - the one in this thread. A review of it with H. Peter Anvin 
pinpointed the breakage:

> +static inline void set_system_gate(unsigned int n, void *addr)
> +{
> +	BUG_ON((unsigned)n > 0xFF);
> +	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
> +}

> -static inline void set_system_gate(int nr, void *func)
> -{
> -	BUG_ON((unsigned)nr > 0xFF);
> -	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
> -}

you changed the type of system gates on 64-bit from GATE_INTERRUPT to 
GATE_TRAP. The effect of this is that these gates enter with interrupts 
enabled - instead of interrupts disabled. This, amongst others, affects 
the following key gate:

        set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);

which relies on disabled interrupts to fix up its stack. If an interrupt 
comes in the wrong moment then we get a kernel stack corruption that is 
not survivable.

the reason for this bug was that you tried to do too many changes in a 
single patch. You did a cleanup, you did unification and you moved code 
around. It was totally non-obvious what you did and the resulting patch 
was not reviewable at all - even after the bisection poinpointed the 
patch, it took us almost 30 minutes to figure out where the bug was. If 
this unstructured, careless mess of patches continues then we are not 
going to be able to accept any more 64-bit paravirt patches into 
x86.git.

	Ingo

[PATCH 18/19] move _set_gate and its users to a common location

[Glauber de Oliveira Costa]

This patch moves _set_gate and its users to desc.h. We can now
use common code for x86_64 and i386.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |   34 ----------------
 include/asm-x86/desc.h      |   88 +++++++++++++++++++++++++++++++++++++++++++
 include/asm-x86/desc_32.h   |   16 --------
 include/asm-x86/desc_64.h   |   45 ----------------------
 include/asm-x86/desc_defs.h |    5 +--
 5 files changed, 89 insertions(+), 99 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/traps_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/traps_32.c
+++ linux-2.6-x86/arch/x86/kernel/traps_32.c
@@ -1102,40 +1102,6 @@ asmlinkage void math_emulate(long arg)
 
 #endif /* CONFIG_MATH_EMULATION */
 
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
 
 void __init trap_init(void)
 {
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -33,6 +33,22 @@ extern struct desc_struct cpu_gdt_table[
 extern struct desc_ptr cpu_gdt_descr[];
 /* the cpu gdt accessor */
 #define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+			     unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate->offset_low = PTR_LOW(func);
+	gate->segment = __KERNEL_CS;
+	gate->ist = ist;
+	gate->p = 1;
+	gate->dpl = dpl;
+	gate->zero0 = 0;
+	gate->zero1 = 0;
+	gate->type = type;
+	gate->offset_middle = PTR_MIDDLE(func);
+	gate->offset_high = PTR_HIGH(func);
+}
+
 #else
 struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
@@ -43,6 +59,16 @@ static inline struct desc_struct *get_cp
 {
 	return per_cpu(gdt_page, cpu).gdt;
 }
+
+static inline void pack_gate(gate_desc *gate, unsigned char type,
+       unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+
+{
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) |
+		  (((0x80 | type | (dpl << 5)) & 0xff) << 8);
+}
+
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -234,6 +260,68 @@ static inline unsigned long get_desc_bas
 {
 	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+static inline void _set_gate(int gate, unsigned type, void *addr,
+			      unsigned dpl, unsigned ist, unsigned seg)
+{
+	gate_desc s;
+	pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+	/*
+	 * does not need to be atomic because it is only done once at
+	 * setup time
+	 */
+	write_idt_entry(idt_table, gate, &s);
+}
+
+/*
+ * This needs to use 'idt_table' rather than 'idt', and
+ * thus use the _nonmapped_ version of the IDT, as the
+ * Pentium F0 0F bugfix can have resulted in the mapped
+ * IDT being write-protected.
+ */
+static inline void set_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+}
+
+/*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+static inline void set_system_intr_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
+}
+
+static inline void set_system_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
+static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
+}
+
+static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
+}
+
+static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
+}
 
 #else
 /*
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -10,22 +10,6 @@
 #include <linux/preempt.h>
 #include <linux/percpu.h>
 
-extern void set_intr_gate(unsigned int irq, void * addr);
-
-static inline void pack_gate(gate_desc *gate,
-	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
-{
-	gate->a = (seg << 16) | (base & 0xffff);
-	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
-}
-
-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
-{
-	gate_desc g;
-	pack_gate(&g, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, &g);
-}
-
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
 {
 	tss_desc tss;
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -11,51 +11,6 @@
 
 #include <asm/segment.h>
 
-static inline void _set_gate(int gate, unsigned type, unsigned long func,
-			     unsigned dpl, unsigned ist)
-{
-	gate_desc s;
-
-	s.offset_low = PTR_LOW(func);
-	s.segment = __KERNEL_CS;
-	s.ist = ist;
-	s.p = 1;
-	s.dpl = dpl;
-	s.zero0 = 0;
-	s.zero1 = 0;
-	s.type = type;
-	s.offset_middle = PTR_MIDDLE(func);
-	s.offset_high = PTR_HIGH(func);
-	/*
-	 * does not need to be atomic because it is only done once at
-	 * setup time
-	 */
-	write_idt_entry(idt_table, gate, &s);
-}
-
-static inline void set_intr_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, 0);
-}
-
-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 0, ist);
-}
-
-static inline void set_system_gate(int nr, void *func)
-{
-	BUG_ON((unsigned)nr > 0xFF);
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, 0);
-}
-
-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
-{
-	_set_gate(nr, GATE_INTERRUPT, (unsigned long) func, 3, ist);
-}
-
 static inline void set_tss_desc(unsigned cpu, void *addr)
 {
 	struct desc_struct *d = get_cpu_gdt_table(cpu);
Index: linux-2.6-x86/include/asm-x86/desc_defs.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_defs.h
+++ linux-2.6-x86/include/asm-x86/desc_defs.h
@@ -36,6 +36,7 @@ enum {
 	GATE_INTERRUPT = 0xE,
 	GATE_TRAP = 0xF,
 	GATE_CALL = 0xC,
+	GATE_TASK = 0x5,
 };
 
 // 16byte gate
@@ -55,10 +56,6 @@ struct gate_struct64 {
 enum {
 	DESC_TSS = 0x9,
 	DESC_LDT = 0x2,
-	DESCTYPE_TASK = 0x85,   /* present, system, DPL-0, task gate */
-	DESCTYPE_INT =  0x8e,   /* present, system, DPL-0, interrupt gate */
-	DESCTYPE_TRAP = 0x8f,   /* present, system, DPL-0, trap gate */
-	DESCTYPE_DPL3 = 0x60,   /* DPL-3 */
 	DESCTYPE_S =	0x10,	/* !system */
 };

[PATCH 16/19] modify get_desc_base

[Glauber de Oliveira Costa]

This patch makes get_desc_base() receive a struct desc_struct,
and then uses its internal fields to compute the base address.
This is done at both i386 and x86_64, and then it is moved
to common header

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/tls.c  |    2 +-
 arch/x86/mm/fault_32.c |    2 +-
 include/asm-x86/desc.h |    8 ++------
 3 files changed, 4 insertions(+), 8 deletions(-)

Index: linux-2.6-x86/arch/x86/kernel/tls.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/tls.c
+++ linux-2.6-x86/arch/x86/kernel/tls.c
@@ -112,7 +112,7 @@ int do_get_thread_area(struct task_struc
 
 	memset(&info, 0, sizeof(struct user_desc));
 	info.entry_number = idx;
-	info.base_addr = get_desc_base((void *)desc);
+	info.base_addr = get_desc_base((struct desc_struct *)desc);
 	info.limit = GET_LIMIT(desc);
 	info.seg_32bit = GET_32BIT(desc);
 	info.contents = GET_CONTENTS(desc);
Index: linux-2.6-x86/arch/x86/mm/fault_32.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/mm/fault_32.c
+++ linux-2.6-x86/arch/x86/mm/fault_32.c
@@ -115,7 +115,7 @@ static inline unsigned long get_segment_
 	}
 
 	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
+	base = get_desc_base((struct desc_struct *)desc);
 
 	if (seg & (1<<2)) { 
 		mutex_unlock(&current->mm->context.lock);
Index: linux-2.6-x86/include/asm-x86/desc.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc.h
+++ linux-2.6-x86/include/asm-x86/desc.h
@@ -69,6 +69,11 @@ static inline void load_LDT(mm_context_t
 	preempt_enable();
 }
 
+static inline unsigned long get_desc_base(struct desc_struct *desc)
+{
+	return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
+}
+
 #else
 /*
  * GET_DESC_BASE reads the descriptor base of the specified segment.
Index: linux-2.6-x86/include/asm-x86/desc_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_32.h
+++ linux-2.6-x86/include/asm-x86/desc_32.h
@@ -168,14 +168,6 @@ static inline void __set_tss_desc(unsign
 
 #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
 
-static inline unsigned long get_desc_base(unsigned long *desc)
-{
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif
Index: linux-2.6-x86/include/asm-x86/desc_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/desc_64.h
+++ linux-2.6-x86/include/asm-x86/desc_64.h
@@ -156,15 +156,6 @@ static inline void load_TLS(struct threa
 		gdt[i] = t->tls_array[i];
 }
 
-static inline unsigned long get_desc_base(const void *ptr)
-{
-	const u32 *desc = ptr;
-	unsigned long base;
-	base = ((desc[0] >> 16)  & 0x0000ffff) |
-		((desc[1] << 16) & 0x00ff0000) |
-		(desc[1] & 0xff000000);
-	return base;
-}
 #endif /* !__ASSEMBLY__ */
 
 #endif

[PATCH 10/19] provide tss_desc

[Glauber de Oliveira Costa]

Provide a new type, tss_desc, to represent the tss descriptor
in a unified way accross x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_defs.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 5a58fc1..c4d7874 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -70,9 +70,11 @@ struct ldttss_desc64 {
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
 typedef struct ldttss_desc64 ldt_desc;
+typedef struct ldttss_desc64 tss_desc;
 #else
 typedef struct desc_struct gate_desc;
 typedef struct desc_struct ldt_desc;
+typedef struct desc_struct tss_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 08/19] modify write_ldt function

[Glauber de Oliveira Costa]

This patch modifies the write_ldt() function to make use
of the new struct desc_struct instead of entry_1 and entry_2
entries

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/ldt.c |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index a8cdca3..7eb0c8a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -186,7 +186,7 @@ static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
 	struct mm_struct *mm = current->mm;
-	__u32 entry_1, entry_2;
+	struct desc_struct ldt;
 	int error;
 	struct user_desc ldt_info;
 
@@ -218,21 +218,20 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 	/* Allow LDTs to be cleared by the user. */
 	if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
 		if (oldmode || LDT_empty(&ldt_info)) {
-			entry_1 = 0;
-			entry_2 = 0;
+			memset(&ldt, 0, sizeof(ldt));
 			goto install;
 		}
 	}
 
-	entry_1 = LDT_entry_a(&ldt_info);
-	entry_2 = LDT_entry_b(&ldt_info);
+	ldt.a = LDT_entry_a(&ldt_info);
+	ldt.b = LDT_entry_b(&ldt_info);
 	if (oldmode)
-		entry_2 &= ~(1 << 20);
+		ldt.avl = 0;
 
 	/* Install the new entry ...  */
 install:
-	write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
-			entry_2);
+	write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+			ldt.a, ldt.b);
 	error = 0;
 
 out_unlock:
-- 
1.5.0.6

[PATCH 07/19] introduce ldt_desc type.

[Glauber de Oliveira Costa]

this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h   |    2 +-
 include/asm-x86/desc_defs.h |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index ffc6c06..8fe1b4c 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
 static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
 					 unsigned type, unsigned size)
 {
-	struct ldttss_desc d;
+	struct ldttss_desc64 d;
 
 	memset(&d, 0, sizeof(d));
 	d.limit0 = size & 0xFFFF;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index 05eff93..5a58fc1 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -58,7 +58,7 @@ enum {
 };
 
 // LDT or TSS descriptor in the GDT. 16 bytes.
-struct ldttss_desc {
+struct ldttss_desc64 {
 	u16 limit0;
 	u16 base0;
 	unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
 
 #ifdef CONFIG_X86_64
 typedef struct gate_struct64 gate_desc;
+typedef struct ldttss_desc64 ldt_desc;
 #else
 typedef struct desc_struct gate_desc;
+typedef struct desc_struct ldt_desc;
 #endif
 
 struct desc_ptr {
-- 
1.5.0.6

[PATCH 05/19] introduce gate_desc type.

[Glauber de Oliveira Costa]

To account for the differences in gate descriptor in i386 and x86_64
a gate_desc type is introduced.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 arch/x86/kernel/traps_32.c  |    3 ++-
 include/asm-x86/desc_32.h   |   15 ++++++++-------
 include/asm-x86/desc_64.h   |    4 ++--
 include/asm-x86/desc_defs.h |    8 +++++++-
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 94c5aea..6b03d88 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -76,8 +76,8 @@ char ignore_fpu_irq = 0;
  * F0 0F bug workaround.. We have a special link segment
  * for this.
  */
-struct desc_struct idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
 
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
index bc5ca34..77f1e5a 100644
--- a/include/asm-x86/desc_32.h
+++ b/include/asm-x86/desc_32.h
@@ -3,6 +3,7 @@
 
 #include <asm/ldt.h>
 #include <asm/segment.h>
+#include <asm/desc_defs.h>
 
 #ifndef __ASSEMBLY__
 
@@ -24,7 +25,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 }
 
 extern struct desc_ptr idt_descr;
-extern struct desc_struct idt_table[];
+extern gate_desc idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
 static inline void pack_descriptor(__u32 *a, __u32 *b,
@@ -35,11 +36,11 @@ static inline void pack_descriptor(__u32 *a, __u32 *b,
 		(limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
 }
 
-static inline void pack_gate(__u32 *a, __u32 *b,
+static inline void pack_gate(gate_desc *gate,
 	unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
 {
-	*a = (seg << 16) | (base & 0xffff);
-	*b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+	gate->a = (seg << 16) | (base & 0xffff);
+	gate->b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
 }
 
 #define DESCTYPE_LDT 	0x82	/* present, system, DPL-0, LDT */
@@ -139,9 +140,9 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
 
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
-	__u32 a, b;
-	pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
-	write_idt_entry(idt_table, gate, a, b);
+	gate_desc g;
+	pack_gate(&g, (unsigned long)addr, seg, type, 0);
+	write_idt_entry(idt_table, gate, g.a, g.b);
 }
 
 static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 660cc84..ffc6c06 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,7 +30,7 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-extern struct gate_struct idt_table[];
+extern gate_desc idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
 static inline void write_ldt_entry(struct desc_struct *ldt,
@@ -58,7 +58,7 @@ static inline void store_gdt(struct desc_ptr *ptr)
 static inline void _set_gate(void *adr, unsigned type, unsigned long func,
 			     unsigned dpl, unsigned ist)
 {
-	struct gate_struct s;
+	gate_desc s;
 
 	s.offset_low = PTR_LOW(func);
 	s.segment = __KERNEL_CS;
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index f37b44c..05eff93 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -39,7 +39,7 @@ enum {
 };
 
 // 16byte gate
-struct gate_struct {
+struct gate_struct64 {
 	u16 offset_low;
 	u16 segment;
 	unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
@@ -67,6 +67,12 @@ struct ldttss_desc {
 	u32 zero1;
 } __attribute__((packed));
 
+#ifdef CONFIG_X86_64
+typedef struct gate_struct64 gate_desc;
+#else
+typedef struct desc_struct gate_desc;
+#endif
+
 struct desc_ptr {
 	unsigned short size;
 	unsigned long address;
-- 
1.5.0.6

[PATCH 04/19] removed unused variable

[Glauber de Oliveira Costa]

This variable is not used anywere, and is then removed

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
 include/asm-x86/desc_64.h |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 1c26dbb..660cc84 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -30,11 +30,6 @@ static inline unsigned long __store_tr(void)
 
 #define store_tr(tr) (tr) = __store_tr()
 
-/*
- * This is the ldt that every process will get unless we need
- * something other than this.
- */
-extern struct desc_struct default_ldt[];
 extern struct gate_struct idt_table[];
 extern struct desc_ptr cpu_gdt_descr[];
 
-- 
1.5.0.6

Re: [PATCH 0/19 -v4] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Since the last version of it received no comments on the interfaces, 
> here it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the 
> #defines in the desc_struct definition were merged. I also implemented 
> the vmi functions, missing last time.
> 
> Ingo, in the absense of further complaints, could you please push to 
> the x86 tree?

well i've already included v3 in x86.git (and it's pushed out), and that 
was looking good already in review and in testing - could you send a 
v3->v4 delta too?

	Ingo

Re: [PATCH 0/19 -v4] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Glauber de Oliveira Costa <gcosta@redhat.com> wrote:
> 
>> Since the last version of it received no comments on the interfaces, 
>> here it goes a version, that I feel ready for inclusion.
>>
>> The comments regarding style, specially the elimination of the 
>> #defines in the desc_struct definition were merged. I also implemented 
>> the vmi functions, missing last time.
>>
>> Ingo, in the absense of further complaints, could you please push to 
>> the x86 tree?
> 
> well i've already included v3 in x86.git (and it's pushed out), and that 
> was looking good already in review and in testing - could you send a 
> v3->v4 delta too?
Sure. The only real difference was Andi suggestion, but it was more 
stylish. Will do soon.

Re: [PATCH 0/19 -v4] desc_struct integration

[Glauber de Oliveira Costa]

Ingo Molnar wrote:
> * Glauber de Oliveira Costa <gcosta@redhat.com> wrote:
> 
>> Since the last version of it received no comments on the interfaces, 
>> here it goes a version, that I feel ready for inclusion.
>>
>> The comments regarding style, specially the elimination of the 
>> #defines in the desc_struct definition were merged. I also implemented 
>> the vmi functions, missing last time.
>>
>> Ingo, in the absense of further complaints, could you please push to 
>> the x86 tree?
> 
> well i've already included v3 in x86.git (and it's pushed out), and that 
> was looking good already in review and in testing - could you send a 
> v3->v4 delta too?
Sure. The only real difference was Andi suggestion, but it was more 
stylish. Will do soon.

Re: [PATCH 0/19 -v4] desc_struct integration

[Ingo Molnar]

* Glauber de Oliveira Costa <gcosta@redhat.com> wrote:

> Since the last version of it received no comments on the interfaces, 
> here it goes a version, that I feel ready for inclusion.
> 
> The comments regarding style, specially the elimination of the 
> #defines in the desc_struct definition were merged. I also implemented 
> the vmi functions, missing last time.
> 
> Ingo, in the absense of further complaints, could you please push to 
> the x86 tree?

well i've already included v3 in x86.git (and it's pushed out), and that 
was looking good already in review and in testing - could you send a 
v3->v4 delta too?

	Ingo

[PATCH 0/19 -v4] desc_struct integration

[Glauber de Oliveira Costa]

Since the last version of it received no comments on the interfaces, here
it goes a version, that I feel ready for inclusion.

The comments regarding style, specially the elimination of the #defines in
the desc_struct definition were merged. I also implemented the vmi
functions,
missing last time.

Ingo, in the absense of further complaints, could you please push to the
x86 tree?

[PATCH 0/19 - v3] desc_struct integration

[Glauber de Oliveira Costa]

Here it goes a new version of the patchset.

It addresses the problems raised, namely:
* it does not harm make headers_check anymore. (fill_ldt is moved to desc.h)
* it fixes the x86_64 spontaneous boot problem
* it does not have a warning at get_desc_base() anymore.