[PATCH 1/5 -v2] move lg.h to include/asm-

Steven Rostedt
2007-08-09T04:44:57Z

[-- Attachment #1: 0001-move-lg.h-to-include-asm-arch.txt --]
[-- Type: text/plain, Size: 24982 bytes --]

The lg.h file has lots of i386 specific information. Move it over to the asm
directory where it belongs.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
arch/i386/kernel/asm-offsets.c | 2 +-
drivers/lguest/core.c | 2 +-
drivers/lguest/hypercalls.c | 2 +-
drivers/lguest/interrupts_and_traps.c | 2 +-
drivers/lguest/io.c | 2 +-
drivers/lguest/lg.h | 300 ---------------------------------
drivers/lguest/lguest_user.c | 2 +-
drivers/lguest/page_tables.c | 2 +-
drivers/lguest/segments.c | 2 +-
drivers/lguest/switcher.S | 2 +-
include/asm-i386/lg.h | 300 +++++++++++++++++++++++++++++++++
11 files changed, 309 insertions(+), 309 deletions(-)

diff --git a/arch/i386/kernel/asm-offsets.c b/arch/i386/kernel/asm-offsets.c
index 7288ac8..e426e51 100644
--- a/arch/i386/kernel/asm-offsets.c
+++ b/arch/i386/kernel/asm-offsets.c
@@ -21,7 +21,7 @@

#ifdef CONFIG_LGUEST_GUEST
#include <linux/lguest.h>
-#include "../../../drivers/lguest/lg.h"
+#include <asm/lg.h>
#endif

#define DEFINE(sym, val) \
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 0a46e88..e5f441d 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -19,7 +19,7 @@
#include <asm/highmem.h>
#include <asm/asm-offsets.h>
#include <asm/i387.h>
-#include "lg.h"
+#include <asm/lg.h>

/* Found in switcher.S */
extern char start_switcher_text[], end_switcher_text[], switch_to_guest[];
diff --git a/drivers/lguest/hypercalls.c b/drivers/lguest/hypercalls.c
index db6caac..0ddb133 100644
--- a/drivers/lguest/hypercalls.c
+++ b/drivers/lguest/hypercalls.c
@@ -26,7 +26,7 @@
#include <asm/page.h>
#include <asm/pgtable.h>
#include <irq_vectors.h>
-#include "lg.h"
+#include <asm/lg.h>

/*H:120 This is the core hypercall routine: where the Guest gets what it
* wants. Or gets killed. Or, in the case of LHCALL_CRASH, both.
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c
index 49787e9..899e681 100644
--- a/drivers/lguest/interrupts_and_traps.c
+++ b/drivers/lguest/interrupts_and_traps.c
@@ -12,7 +12,7 @@
* them first, so we also have a way of "reflecting" them into the Guest as if
* they had been delivered to it directly. :*/
#include <linux/uaccess.h>
-#include "lg.h"
+#include <asm/lg.h>

/* The address of the interrupt handler is split into two bits: */
static unsigned long idt_address(u32 lo, u32 hi)
diff --git a/drivers/lguest/io.c b/drivers/lguest/io.c
index ea68613..091a46d 100644
--- a/drivers/lguest/io.c
+++ b/drivers/lguest/io.c
@@ -25,7 +25,7 @@
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/uaccess.h>
-#include "lg.h"
+#include <asm/lg.h>

/*L:300
* I/O
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
deleted file mode 100644
index 64f0abe..0000000
--- a/drivers/lguest/lg.h
+++ /dev/null
@@ -1,300 +0,0 @@
-#ifndef _LGUEST_H
-#define _LGUEST_H
-
-#include <asm/desc.h>
-
-#define GDT_ENTRY_LGUEST_CS 10
-#define GDT_ENTRY_LGUEST_DS 11
-#define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8)
-#define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8)
-
-#ifndef __ASSEMBLY__
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/stringify.h>
-#include <linux/binfmts.h>
-#include <linux/futex.h>
-#include <linux/lguest.h>
-#include <linux/lguest_launcher.h>
-#include <linux/wait.h>
-#include <linux/err.h>
-#include <asm/semaphore.h>
-#include "irq_vectors.h"
-
-#define GUEST_PL 1
-
-struct lguest_regs
-{
- /* Manually saved part. */
- unsigned long ebx, ecx, edx;
- unsigned long esi, edi, ebp;
- unsigned long gs;
- unsigned long eax;
- unsigned long fs, ds, es;
- unsigned long trapnum, errcode;
- /* Trap pushed part */
- unsigned long eip;
- unsigned long cs;
- unsigned long eflags;
- unsigned long esp;
- unsigned long ss;
-};
-
-void free_pagetables(void);
-int init_pagetables(struct page **switcher_page, unsigned int pages);
-
-/* 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})
-
-struct lguest_dma_info
-{
- struct list_head list;
- union futex_key key;
- unsigned long dmas;
- u16 next_dma;
- u16 num_dmas;
- u16 guestid;
- u8 interrupt; /* 0 when not registered */
-};
-
-/*H:310 The page-table code owes a great debt of gratitude to Andi Kleen. He
- * reviewed the original code which used "u32" for all page table entries, and
- * insisted that it would be far clearer with explicit typing. I thought it
- * was overkill, but he was right: it is much clearer than it was before.
- *
- * We have separate types for the Guest's ptes & pgds and the shadow ptes &
- * pgds. There's already a Linux type for these (pte_t and pgd_t) but they
- * change depending on kernel config options (PAE). */
-
-/* Each entry is identical: lower 12 bits of flags and upper 20 bits for the
- * "page frame number" (0 == first physical page, etc). They are different
- * types so the compiler will warn us if we mix them improperly. */
-typedef union {
- struct { unsigned flags:12, pfn:20; };
- struct { unsigned long val; } raw;
-} spgd_t;
-typedef union {
- struct { unsigned flags:12, pfn:20; };
- struct { unsigned long val; } raw;
-} spte_t;
-typedef union {
- struct { unsigned flags:12, pfn:20; };
- struct { unsigned long val; } raw;
-} gpgd_t;
-typedef union {
- struct { unsigned flags:12, pfn:20; };
- struct { unsigned long val; } raw;
-} gpte_t;
-
-/* We have two convenient macros to convert a "raw" value as handed to us by
- * the Guest into the correct Guest PGD or PTE type. */
-#define mkgpte(_val) ((gpte_t){.raw.val = _val})
-#define mkgpgd(_val) ((gpgd_t){.raw.val = _val})
-/*:*/
-
-struct pgdir
-{
- unsigned long cr3;
- spgd_t *pgdir;
-};
-
-/* This is a guest-specific page (mapped ro) into the guest. */
-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;
- 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 i386_hw_tss guest_tss;
- struct desc_struct guest_idt[IDT_ENTRIES];
- struct desc_struct guest_gdt[GDT_ENTRIES];
-};
-
-/* We have two pages shared with guests, per cpu. */
-struct lguest_pages
-{
- /* This is the stack page mapped rw in guest */
- char spare[PAGE_SIZE - sizeof(struct lguest_regs)];
- struct lguest_regs regs;
-
- /* This is the host state & guest descriptor page, ro in guest */
- struct lguest_ro_state state;
-} __attribute__((aligned(PAGE_SIZE)));
-
-#define CHANGED_IDT 1
-#define CHANGED_GDT 2
-#define CHANGED_GDT_TLS 4 /* Actually a subset of CHANGED_GDT */
-#define CHANGED_ALL 3
-
-/* The private info the thread maintains about the guest. */
-struct lguest
-{
- /* At end of a page shared mapped over lguest_pages in guest. */
- unsigned long regs_page;
- struct lguest_regs *regs;
- struct lguest_data __user *lguest_data;
- struct task_struct *tsk;
- struct mm_struct *mm; /* == tsk->mm, but that becomes NULL on exit */
- u16 guestid;
- u32 pfn_limit;
- u32 page_offset;
- u32 cr2;
- int halted;
- int ts;
- u32 next_hcall;
- u32 esp1;
- u8 ss1;
-
- /* Do we need to stop what we're doing and return to userspace? */
- int break_out;
- wait_queue_head_t break_wq;
-
- /* Bitmap of what has changed: see CHANGED_* above. */
- int changed;
- struct lguest_pages *last_pages;
-
- /* We keep a small number of these. */
- u32 pgdidx;
- struct pgdir pgdirs[4];
-
- /* Cached wakeup: we hold a reference to this task. */
- struct task_struct *wake;
-
- unsigned long noirq_start, noirq_end;
- int dma_is_pending;
- unsigned long pending_dma; /* struct lguest_dma */
- unsigned long pending_key; /* address they're sending to */
-
- unsigned int stack_pages;
- u32 tsc_khz;
-
- struct lguest_dma_info dma[LGUEST_MAX_DMA];
-
- /* Dead? */
- const char *dead;
-
- /* The GDT entries copied into lguest_ro_state when running. */
- struct desc_struct gdt[GDT_ENTRIES];
-
- /* The IDT entries: some copied into lguest_ro_state when running. */
- struct desc_struct idt[FIRST_EXTERNAL_VECTOR+LGUEST_IRQS];
- struct desc_struct syscall_idt;
-
- /* Virtual clock device */
- struct hrtimer hrt;
-
- /* Pending virtual interrupts */
- DECLARE_BITMAP(irqs_pending, LGUEST_IRQS);
-};
-
-extern struct lguest lguests[];
-extern struct mutex lguest_lock;
-
-/* core.c: */
-u32 lgread_u32(struct lguest *lg, unsigned long addr);
-void lgwrite_u32(struct lguest *lg, unsigned long addr, u32 val);
-void lgread(struct lguest *lg, void *buf, unsigned long addr, unsigned len);
-void lgwrite(struct lguest *lg, unsigned long, const void *buf, unsigned len);
-int find_free_guest(void);
-int lguest_address_ok(const struct lguest *lg,
- unsigned long addr, unsigned long len);
-int run_guest(struct lguest *lg, unsigned long __user *user);
-
-
-/* interrupts_and_traps.c: */
-void maybe_do_interrupt(struct lguest *lg);
-int deliver_trap(struct lguest *lg, unsigned int num);
-void load_guest_idt_entry(struct lguest *lg, unsigned int i, u32 low, u32 hi);
-void guest_set_stack(struct lguest *lg, u32 seg, u32 esp, unsigned int pages);
-void pin_stack_pages(struct lguest *lg);
-void setup_default_idt_entries(struct lguest_ro_state *state,
- const unsigned long *def);
-void copy_traps(const struct lguest *lg, struct desc_struct *idt,
- const unsigned long *def);
-void guest_set_clockevent(struct lguest *lg, unsigned long delta);
-void init_clockdev(struct lguest *lg);
-
-/* segments.c: */
-void setup_default_gdt_entries(struct lguest_ro_state *state);
-void setup_guest_gdt(struct lguest *lg);
-void load_guest_gdt(struct lguest *lg, unsigned long table, u32 num);
-void guest_load_tls(struct lguest *lg, unsigned long tls_array);
-void copy_gdt(const struct lguest *lg, struct desc_struct *gdt);
-void copy_gdt_tls(const struct lguest *lg, struct desc_struct *gdt);
-
-/* page_tables.c: */
-int init_guest_pagetable(struct lguest *lg, unsigned long pgtable);
-void free_guest_pagetable(struct lguest *lg);
-void guest_new_pagetable(struct lguest *lg, unsigned long pgtable);
-void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 i);
-void guest_pagetable_clear_all(struct lguest *lg);
-void guest_pagetable_flush_user(struct lguest *lg);
-void guest_set_pte(struct lguest *lg, unsigned long cr3,
- unsigned long vaddr, gpte_t val);
-void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages);
-int demand_page(struct lguest *info, unsigned long cr2, int errcode);
-void pin_page(struct lguest *lg, unsigned long vaddr);
-
-/* lguest_user.c: */
-int lguest_device_init(void);
-void lguest_device_remove(void);
-
-/* io.c: */
-void lguest_io_init(void);
-int bind_dma(struct lguest *lg,
- unsigned long key, unsigned long udma, u16 numdmas, u8 interrupt);
-void send_dma(struct lguest *info, unsigned long key, unsigned long udma);
-void release_all_dma(struct lguest *lg);
-unsigned long get_dma_buffer(struct lguest *lg, unsigned long key,
- unsigned long *interrupt);
-
-/* hypercalls.c: */
-void do_hypercalls(struct lguest *lg);
-void write_timestamp(struct lguest *lg);
-
-/*L:035
- * Let's step aside for the moment, to study one important routine that's used
- * widely in the Host code.
- *
- * There are many cases where the Guest does something invalid, like pass crap
- * to a hypercall. Since only the Guest kernel can make hypercalls, it's quite
- * acceptable to simply terminate the Guest and give the Launcher a nicely
- * formatted reason. It's also simpler for the Guest itself, which doesn't
- * need to check most hypercalls for "success"; if you're still running, it
- * succeeded.
- *
- * Once this is called, the Guest will never run again, so most Host code can
- * call this then continue as if nothing had happened. This means many
- * functions don't have to explicitly return an error code, which keeps the
- * code simple.
- *
- * It also means that this can be called more than once: only the first one is
- * remembered. The only trick is that we still need to kill the Guest even if
- * we can't allocate memory to store the reason. Linux has a neat way of
- * packing error codes into invalid pointers, so we use that here.
- *
- * Like any macro which uses an "if", it is safely wrapped in a run-once "do {
- * } while(0)".
- */
-#define kill_guest(lg, fmt...) \
-do { \
- if (!(lg)->dead) { \
- (lg)->dead = kasprintf(GFP_ATOMIC, fmt); \
- if (!(lg)->dead) \
- (lg)->dead = ERR_PTR(-ENOMEM); \
- } \
-} while(0)
-/* (End of aside) :*/
-
-static inline unsigned long guest_pa(struct lguest *lg, unsigned long vaddr)
-{
- return vaddr - lg->page_offset;
-}
-#endif /* __ASSEMBLY__ */
-#endif /* _LGUEST_H */
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index 80d1b58..a29d85b 100644
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -7,7 +7,7 @@
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
-#include "lg.h"
+#include <asm/lg.h>

/*L:030 setup_regs() doesn't really belong in this file, but it gives us an
* early glimpse deeper into the Host so it's worth having here.
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index b7a924a..db3dd8b 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -13,7 +13,7 @@
#include <linux/random.h>
#include <linux/percpu.h>
#include <asm/tlbflush.h>
-#include "lg.h"
+#include <asm/lg.h>

/*M:008 We hold reference to pages, which prevents them from being swapped.
* It'd be nice to have a callback in the "struct mm_struct" when Linux wants
diff --git a/drivers/lguest/segments.c b/drivers/lguest/segments.c
index f675a41..1d16d5d 100644
--- a/drivers/lguest/segments.c
+++ b/drivers/lguest/segments.c
@@ -9,7 +9,7 @@
* In these modern times, the segment handling code consists of simple sanity
* checks, and the worst you'll experience reading this code is butterfly-rash
* from frolicking through its parklike serenity. :*/
-#include "lg.h"
+#include <asm/lg.h>

/*H:600
* We've almost completed the Host; there's just one file to go!
diff --git a/drivers/lguest/switcher.S b/drivers/lguest/switcher.S
index d418179..40382f6 100644
--- a/drivers/lguest/switcher.S
+++ b/drivers/lguest/switcher.S
@@ -47,7 +47,7 @@
// Down here in the depths of assembler code.
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
-#include "lg.h"
+#include <asm/lg.h>

// We mark the start of the code to copy
// It's placed in .text tho it's never run here
diff --git a/include/asm-i386/lg.h b/include/asm-i386/lg.h
new file mode 100644
index 0000000..64f0abe
--- /dev/null
+++ b/include/asm-i386/lg.h
@@ -0,0 +1,300 @@
+#ifndef _LGUEST_H
+#define _LGUEST_H
+
+#include <asm/desc.h>
+
+#define GDT_ENTRY_LGUEST_CS 10
+#define GDT_ENTRY_LGUEST_DS 11
+#define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8)
+#define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8)
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/stringify.h>
+#include <linux/binfmts.h>
+#include <linux/futex.h>
+#include <linux/lguest.h>
+#include <linux/lguest_launcher.h>
+#include <linux/wait.h>
+#include <linux/err.h>
+#include <asm/semaphore.h>
+#include "irq_vectors.h"
+
+#define GUEST_PL 1
+
+struct lguest_regs
+{
+ /* Manually saved part. */
+ unsigned long ebx, ecx, edx;
+ unsigned long esi, edi, ebp;
+ unsigned long gs;
+ unsigned long eax;
+ unsigned long fs, ds, es;
+ unsigned long trapnum, errcode;
+ /* Trap pushed part */
+ unsigned long eip;
+ unsigned long cs;
+ unsigned long eflags;
+ unsigned long esp;
+ unsigned long ss;
+};
+
+void free_pagetables(void);
+int init_pagetables(struct page **switcher_page, unsigned int pages);
+
+/* 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})
+
+struct lguest_dma_info
+{
+ struct list_head list;
+ union futex_key key;
+ unsigned long dmas;
+ u16 next_dma;
+ u16 num_dmas;
+ u16 guestid;
+ u8 interrupt; /* 0 when not registered */
+};
+
+/*H:310 The page-table code owes a great debt of gratitude to Andi Kleen. He
+ * reviewed the original code which used "u32" for all page table entries, and
+ * insisted that it would be far clearer with explicit typing. I thought it
+ * was overkill, but he was right: it is much clearer than it was before.
+ *
+ * We have separate types for the Guest's ptes & pgds and the shadow ptes &
+ * pgds. There's already a Linux type for these (pte_t and pgd_t) but they
+ * change depending on kernel config options (PAE). */
+
+/* Each entry is identical: lower 12 bits of flags and upper 20 bits for the
+ * "page frame number" (0 == first physical page, etc). They are different
+ * types so the compiler will warn us if we mix them improperly. */
+typedef union {
+ struct { unsigned flags:12, pfn:20; };
+ struct { unsigned long val; } raw;
+} spgd_t;
+typedef union {
+ struct { unsigned flags:12, pfn:20; };
+ struct { unsigned long val; } raw;
+} spte_t;
+typedef union {
+ struct { unsigned flags:12, pfn:20; };
+ struct { unsigned long val; } raw;
+} gpgd_t;
+typedef union {
+ struct { unsigned flags:12, pfn:20; };
+ struct { unsigned long val; } raw;
+} gpte_t;
+
+/* We have two convenient macros to convert a "raw" value as handed to us by
+ * the Guest into the correct Guest PGD or PTE type. */
+#define mkgpte(_val) ((gpte_t){.raw.val = _val})
+#define mkgpgd(_val) ((gpgd_t){.raw.val = _val})
+/*:*/
+
+struct pgdir
+{
+ unsigned long cr3;
+ spgd_t *pgdir;
+};
+
+/* This is a guest-specific page (mapped ro) into the guest. */
+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;
+ 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 i386_hw_tss guest_tss;
+ struct desc_struct guest_idt[IDT_ENTRIES];
+ struct desc_struct guest_gdt[GDT_ENTRIES];
+};
+
+/* We have two pages shared with guests, per cpu. */
+struct lguest_pages
+{
+ /* This is the stack page mapped rw in guest */
+ char spare[PAGE_SIZE - sizeof(struct lguest_regs)];
+ struct lguest_regs regs;
+
+ /* This is the host state & guest descriptor page, ro in guest */
+ struct lguest_ro_state state;
+} __attribute__((aligned(PAGE_SIZE)));
+
+#define CHANGED_IDT 1
+#define CHANGED_GDT 2
+#define CHANGED_GDT_TLS 4 /* Actually a subset of CHANGED_GDT */
+#define CHANGED_ALL 3
+
+/* The private info the thread maintains about the guest. */
+struct lguest
+{
+ /* At end of a page shared mapped over lguest_pages in guest. */
+ unsigned long regs_page;
+ struct lguest_regs *regs;
+ struct lguest_data __user *lguest_data;
+ struct task_struct *tsk;
+ struct mm_struct *mm; /* == tsk->mm, but that becomes NULL on exit */
+ u16 guestid;
+ u32 pfn_limit;
+ u32 page_offset;
+ u32 cr2;
+ int halted;
+ int ts;
+ u32 next_hcall;
+ u32 esp1;
+ u8 ss1;
+
+ /* Do we need to stop what we're doing and return to userspace? */
+ int break_out;
+ wait_queue_head_t break_wq;
+
+ /* Bitmap of what has changed: see CHANGED_* above. */
+ int changed;
+ struct lguest_pages *last_pages;
+
+ /* We keep a small number of these. */
+ u32 pgdidx;
+ struct pgdir pgdirs[4];
+
+ /* Cached wakeup: we hold a reference to this task. */
+ struct task_struct *wake;
+
+ unsigned long noirq_start, noirq_end;
+ int dma_is_pending;
+ unsigned long pending_dma; /* struct lguest_dma */
+ unsigned long pending_key; /* address they're sending to */
+
+ unsigned int stack_pages;
+ u32 tsc_khz;
+
+ struct lguest_dma_info dma[LGUEST_MAX_DMA];
+
+ /* Dead? */
+ const char *dead;
+
+ /* The GDT entries copied into lguest_ro_state when running. */
+ struct desc_struct gdt[GDT_ENTRIES];
+
+ /* The IDT entries: some copied into lguest_ro_state when running. */
+ struct desc_struct idt[FIRST_EXTERNAL_VECTOR+LGUEST_IRQS];
+ struct desc_struct syscall_idt;
+
+ /* Virtual clock device */
+ struct hrtimer hrt;
+
+ /* Pending virtual interrupts */
+ DECLARE_BITMAP(irqs_pending, LGUEST_IRQS);
+};
+
+extern struct lguest lguests[];
+extern struct mutex lguest_lock;
+
+/* core.c: */
+u32 lgread_u32(struct lguest *lg, unsigned long addr);
+void lgwrite_u32(struct lguest *lg, unsigned long addr, u32 val);
+void lgread(struct lguest *lg, void *buf, unsigned long addr, unsigned len);
+void lgwrite(struct lguest *lg, unsigned long, const void *buf, unsigned len);
+int find_free_guest(void);
+int lguest_address_ok(const struct lguest *lg,
+ unsigned long addr, unsigned long len);
+int run_guest(struct lguest *lg, unsigned long __user *user);
+
+
+/* interrupts_and_traps.c: */
+void maybe_do_interrupt(struct lguest *lg);
+int deliver_trap(struct lguest *lg, unsigned int num);
+void load_guest_idt_entry(struct lguest *lg, unsigned int i, u32 low, u32 hi);
+void guest_set_stack(struct lguest *lg, u32 seg, u32 esp, unsigned int pages);
+void pin_stack_pages(struct lguest *lg);
+void setup_default_idt_entries(struct lguest_ro_state *state,
+ const unsigned long *def);
+void copy_traps(const struct lguest *lg, struct desc_struct *idt,
+ const unsigned long *def);
+void guest_set_clockevent(struct lguest *lg, unsigned long delta);
+void init_clockdev(struct lguest *lg);
+
+/* segments.c: */
+void setup_default_gdt_entries(struct lguest_ro_state *state);
+void setup_guest_gdt(struct lguest *lg);
+void load_guest_gdt(struct lguest *lg, unsigned long table, u32 num);
+void guest_load_tls(struct lguest *lg, unsigned long tls_array);
+void copy_gdt(const struct lguest *lg, struct desc_struct *gdt);
+void copy_gdt_tls(const struct lguest *lg, struct desc_struct *gdt);
+
+/* page_tables.c: */
+int init_guest_pagetable(struct lguest *lg, unsigned long pgtable);
+void free_guest_pagetable(struct lguest *lg);
+void guest_new_pagetable(struct lguest *lg, unsigned long pgtable);
+void guest_set_pmd(struct lguest *lg, unsigned long cr3, u32 i);
+void guest_pagetable_clear_all(struct lguest *lg);
+void guest_pagetable_flush_user(struct lguest *lg);
+void guest_set_pte(struct lguest *lg, unsigned long cr3,
+ unsigned long vaddr, gpte_t val);
+void map_switcher_in_guest(struct lguest *lg, struct lguest_pages *pages);
+int demand_page(struct lguest *info, unsigned long cr2, int errcode);
+void pin_page(struct lguest *lg, unsigned long vaddr);
+
+/* lguest_user.c: */
+int lguest_device_init(void);
+void lguest_device_remove(void);
+
+/* io.c: */
+void lguest_io_init(void);
+int bind_dma(struct lguest *lg,
+ unsigned long key, unsigned long udma, u16 numdmas, u8 interrupt);
+void send_dma(struct lguest *info, unsigned long key, unsigned long udma);
+void release_all_dma(struct lguest *lg);
+unsigned long get_dma_buffer(struct lguest *lg, unsigned long key,
+ unsigned long *interrupt);
+
+/* hypercalls.c: */
+void do_hypercalls(struct lguest *lg);
+void write_timestamp(struct lguest *lg);
+
+/*L:035
+ * Let's step aside for the moment, to study one important routine that's used
+ * widely in the Host code.
+ *
+ * There are many cases where the Guest does something invalid, like pass crap
+ * to a hypercall. Since only the Guest kernel can make hypercalls, it's quite
+ * acceptable to simply terminate the Guest and give the Launcher a nicely
+ * formatted reason. It's also simpler for the Guest itself, which doesn't
+ * need to check most hypercalls for "success"; if you're still running, it
+ * succeeded.
+ *
+ * Once this is called, the Guest will never run again, so most Host code can
+ * call this then continue as if nothing had happened. This means many
+ * functions don't have to explicitly return an error code, which keeps the
+ * code simple.
+ *
+ * It also means that this can be called more than once: only the first one is
+ * remembered. The only trick is that we still need to kill the Guest even if
+ * we can't allocate memory to store the reason. Linux has a neat way of
+ * packing error codes into invalid pointers, so we use that here.
+ *
+ * Like any macro which uses an "if", it is safely wrapped in a run-once "do {
+ * } while(0)".
+ */
+#define kill_guest(lg, fmt...) \
+do { \
+ if (!(lg)->dead) { \
+ (lg)->dead = kasprintf(GFP_ATOMIC, fmt); \
+ if (!(lg)->dead) \
+ (lg)->dead = ERR_PTR(-ENOMEM); \
+ } \
+} while(0)
+/* (End of aside) :*/
+
+static inline unsigned long guest_pa(struct lguest *lg, unsigned long vaddr)
+{
+ return vaddr - lg->page_offset;
+}
+#endif /* __ASSEMBLY__ */
+#endif /* _LGUEST_H */
--
1.4.4.4

--