[PATCH 21/21] [PATCH] finish processor.h integration

Glauber de Oliveira Costa
2007-12-18T01:43:35Z

What's left in processor_32.h and processor_64.h cannot be cleanly
integrated. However, it's just a couple of definitions. They are moved
to processor.h around ifdefs, and the original files are deleted. Note that
there's much less headers included in the final version.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
include/asm-x86/processor.h | 130 +++++++++++++++++++++++++++++++++++++++-
include/asm-x86/processor_32.h | 97 ------------------------------
include/asm-x86/processor_64.h | 66 --------------------
3 files changed, 127 insertions(+), 166 deletions(-)

Index: linux-2.6-x86/include/asm-x86/processor.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor.h
+++ linux-2.6-x86/include/asm-x86/processor.h
@@ -2,13 +2,15 @@
#define __ASM_X86_PROCESSOR_H

#include <asm/processor-flags.h>
-
+#include <asm/desc_defs.h>
+#include <asm/msr.h>
#include <asm/page.h>
#include <asm/percpu.h>
#include <asm/system.h>
#include <asm/percpu.h>
#include <linux/cpumask.h>
#include <linux/cache.h>
+#include <linux/personality.h>

/*
* Default implementation of macro that returns current
@@ -271,7 +273,11 @@ union i387_union {
struct i387_soft_struct soft;
};

-# include "processor_32.h"
+/*
+ * the following now lives in the per cpu area:
+ * extern int cpu_llc_id[NR_CPUS];
+ */
+DECLARE_PER_CPU(u8, cpu_llc_id);
#else
struct i387_fxsave_struct {
u16 cwd;
@@ -291,7 +297,7 @@ union i387_union {
struct i387_fxsave_struct fxsave;
};

-# include "processor_64.h"
+DECLARE_PER_CPU(struct orig_ist, orig_ist);
#endif

extern void print_cpu_info(struct cpuinfo_x86 *);
@@ -774,6 +780,124 @@ static inline void prefetchw(const void
}

#define spin_lock_prefetch(x) prefetchw(x)
+#ifdef CONFIG_X86_32
+/*
+ * User space process size: 3GB (default).
+ */
+#define TASK_SIZE (PAGE_OFFSET)
+
+#define INIT_THREAD { \
+ .sp0 = sizeof(init_stack) + (long)&init_stack, \
+ .vm86_info = NULL, \
+ .sysenter_cs = __KERNEL_CS, \
+ .io_bitmap_ptr = NULL, \
+ .fs = __KERNEL_PERCPU, \
+}
+
+/*
+ * Note that the .io_bitmap member must be extra-big. This is because
+ * the CPU will access an additional byte beyond the end of the IO
+ * permission bitmap. The extra byte must be all 1 bits, and must
+ * be within the limit.
+ */
+#define INIT_TSS { \
+ .x86_tss = { \
+ .sp0 = sizeof(init_stack) + (long)&init_stack, \
+ .ss0 = __KERNEL_DS, \
+ .ss1 = __KERNEL_CS, \
+ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
+ }, \
+ .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \
+}
+
+#define start_thread(regs, new_eip, new_esp) do { \
+ __asm__("movl %0,%%gs": :"r" (0)); \
+ regs->fs = 0; \
+ set_fs(USER_DS); \
+ regs->ds = __USER_DS; \
+ regs->es = __USER_DS; \
+ regs->ss = __USER_DS; \
+ regs->cs = __USER_CS; \
+ regs->ip = new_eip; \
+ regs->sp = new_esp; \
+} while (0)
+
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
+#define KSTK_TOP(info) \
+({ \
+ unsigned long *__ptr = (unsigned long *)(info); \
+ (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
+})
+
+/*
+ * The below -8 is to reserve 8 bytes on top of the ring0 stack.
+ * This is necessary to guarantee that the entire "struct pt_regs"
+ * is accessable even if the CPU haven't stored the SS/ESP registers
+ * on the stack (interrupt gate does not save these registers
+ * when switching to the same priv ring).
+ * Therefore beware: accessing the ss/esp fields of the
+ * "struct pt_regs" is possible, but they may contain the
+ * completely wrong values.
+ */
+#define task_pt_regs(task) \
+({ \
+ struct pt_regs *__regs__; \
+ __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
+ __regs__ - 1; \
+})
+
+#define KSTK_ESP(task) (task_pt_regs(task)->sp)
+
+#else
+/*
+ * User space process size. 47bits minus one guard page.
+ */
+#define TASK_SIZE64 (0x800000000000UL - 4096)
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
+ 0xc0000000 : 0xFFFFe000)
+
+#define TASK_SIZE (test_thread_flag(TIF_IA32) ? \
+ IA32_PAGE_OFFSET : TASK_SIZE64)
+#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \
+ IA32_PAGE_OFFSET : TASK_SIZE64)
+
+#define INIT_THREAD { \
+ .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
+
+#define INIT_TSS { \
+ .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
+
+#define start_thread(regs, new_rip, new_rsp) do { \
+ asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
+ load_gs_index(0); \
+ (regs)->ip = (new_rip); \
+ (regs)->sp = (new_rsp); \
+ write_pda(oldrsp, (new_rsp)); \
+ (regs)->cs = __USER_CS; \
+ (regs)->ss = __USER_DS; \
+ (regs)->flags = 0x200; \
+ set_fs(USER_DS); \
+} while (0)
+
+/*
+ * Return saved PC of a blocked thread.
+ * What is this good for? it will be always the scheduler or ret_from_fork.
+ */
+#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
+
+#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
+#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
+#endif /* CONFIG_X86_64 */
+
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 1994 Linus Torvalds
- */
-
-#ifndef __ASM_I386_PROCESSOR_H
-#define __ASM_I386_PROCESSOR_H
-
-#include <asm/vm86.h>
-#include <asm/math_emu.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/types.h>
-#include <asm/sigcontext.h>
-#include <asm/cpufeature.h>
-#include <asm/msr.h>
-#include <asm/system.h>
-#include <linux/threads.h>
-#include <linux/init.h>
-#include <asm/desc_defs.h>
-
-/*
- * the following now lives in the per cpu area:
- * extern int cpu_llc_id[NR_CPUS];
- */
-DECLARE_PER_CPU(u8, cpu_llc_id);
-
-/*
- * User space process size: 3GB (default).
- */
-#define TASK_SIZE (PAGE_OFFSET)
-
-#define INIT_THREAD { \
- .sp0 = sizeof(init_stack) + (long)&init_stack, \
- .vm86_info = NULL, \
- .sysenter_cs = __KERNEL_CS, \
- .io_bitmap_ptr = NULL, \
- .fs = __KERNEL_PERCPU, \
-}
-
-/*
- * Note that the .io_bitmap member must be extra-big. This is because
- * the CPU will access an additional byte beyond the end of the IO
- * permission bitmap. The extra byte must be all 1 bits, and must
- * be within the limit.
- */
-#define INIT_TSS { \
- .x86_tss = { \
- .sp0 = sizeof(init_stack) + (long)&init_stack, \
- .ss0 = __KERNEL_DS, \
- .ss1 = __KERNEL_CS, \
- .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
- }, \
- .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
-}
-
-#define start_thread(regs, new_eip, new_esp) do { \
- __asm__("movl %0,%%gs": :"r" (0)); \
- regs->fs = 0; \
- set_fs(USER_DS); \
- regs->ds = __USER_DS; \
- regs->es = __USER_DS; \
- regs->ss = __USER_DS; \
- regs->cs = __USER_CS; \
- regs->ip = new_eip; \
- regs->sp = new_esp; \
-} while (0)
-
-
-extern unsigned long thread_saved_pc(struct task_struct *tsk);
-
-#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
-#define KSTK_TOP(info) \
-({ \
- unsigned long *__ptr = (unsigned long *)(info); \
- (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
-})
-
-/*
- * The below -8 is to reserve 8 bytes on top of the ring0 stack.
- * This is necessary to guarantee that the entire "struct pt_regs"
- * is accessable even if the CPU haven't stored the SS/ESP registers
- * on the stack (interrupt gate does not save these registers
- * when switching to the same priv ring).
- * Therefore beware: accessing the ss/esp fields of the
- * "struct pt_regs" is possible, but they may contain the
- * completely wrong values.
- */
-#define task_pt_regs(task) \
-({ \
- struct pt_regs *__regs__; \
- __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
- __regs__ - 1; \
-})
-
-#define KSTK_ESP(task) (task_pt_regs(task)->sp)
-
-#endif /* __ASM_I386_PROCESSOR_H */
Index: linux-2.6-x86/include/asm-x86/processor_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_64.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (C) 1994 Linus Torvalds
- */
-
-#ifndef __ASM_X86_64_PROCESSOR_H
-#define __ASM_X86_64_PROCESSOR_H
-
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/types.h>
-#include <asm/sigcontext.h>
-#include <asm/cpufeature.h>
-#include <linux/threads.h>
-#include <asm/msr.h>
-#include <asm/current.h>
-#include <asm/system.h>
-#include <linux/personality.h>
-#include <asm/desc_defs.h>
-
-/*
- * User space process size. 47bits minus one guard page.
- */
-#define TASK_SIZE64 (0x800000000000UL - 4096)
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000)
-
-#define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64)
-#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
-
-
-
-DECLARE_PER_CPU(struct orig_ist, orig_ist);
-
-#define INIT_THREAD { \
- .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
-}
-
-#define INIT_TSS { \
- .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
-}
-
-#define start_thread(regs,new_rip,new_rsp) do { \
- asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
- load_gs_index(0); \
- (regs)->ip = (new_rip); \
- (regs)->sp = (new_rsp); \
- write_pda(oldrsp, (new_rsp)); \
- (regs)->cs = __USER_CS; \
- (regs)->ss = __USER_DS; \
- (regs)->flags = 0x200; \
- set_fs(USER_DS); \
-} while(0)
-
-/*
- * Return saved PC of a blocked thread.
- * What is this good for? it will be always the scheduler or ret_from_fork.
- */
-#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
-
-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
-#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
-
-#endif /* __ASM_X86_64_PROCESSOR_H */