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authorIngo Molnar <mingo@elte.hu>2009-06-17 12:52:15 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-17 12:56:49 +0200
commiteadb8a091b27a840de7450f84ecff5ef13476424 (patch)
tree58c3782d40def63baa8167f3d31e3048cb4c7660 /arch/x86/power
parent73874005cd8800440be4299bd095387fff4b90ac (diff)
parent65795efbd380a832ae508b04dba8f8e53f0b84d9 (diff)
downloadlinux-eadb8a091b27a840de7450f84ecff5ef13476424.tar.gz
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts: arch/x86/Kconfig arch/x86/kernel/traps.c arch/x86/power/cpu.c arch/x86/power/cpu_32.c kernel/Makefile Semantic conflict: arch/x86/kernel/hw_breakpoint.c Merge reason: Resolve the conflicts, move from put_cpu_no_sched() to put_cpu() in arch/x86/kernel/hw_breakpoint.c. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/power')
-rw-r--r--arch/x86/power/Makefile2
-rw-r--r--arch/x86/power/cpu.c (renamed from arch/x86/power/cpu_64.c)137
-rw-r--r--arch/x86/power/cpu_32.c141
3 files changed, 106 insertions, 174 deletions
diff --git a/arch/x86/power/Makefile b/arch/x86/power/Makefile
index 58b32db3312..de2abbd0754 100644
--- a/arch/x86/power/Makefile
+++ b/arch/x86/power/Makefile
@@ -3,5 +3,5 @@
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_cpu_$(BITS).o := $(nostackp)
-obj-$(CONFIG_PM_SLEEP) += cpu_$(BITS).o
+obj-$(CONFIG_PM_SLEEP) += cpu.o
obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o
diff --git a/arch/x86/power/cpu_64.c b/arch/x86/power/cpu.c
index 46866a13a93..394cbb88987 100644
--- a/arch/x86/power/cpu_64.c
+++ b/arch/x86/power/cpu.c
@@ -1,5 +1,5 @@
/*
- * Suspend and hibernation support for x86-64
+ * Suspend support specific for i386/x86-64.
*
* Distribute under GPLv2
*
@@ -8,19 +8,29 @@
* Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
*/
-#include <linux/smp.h>
#include <linux/suspend.h>
-#include <asm/proto.h>
-#include <asm/page.h>
+#include <linux/smp.h>
+
#include <asm/pgtable.h>
+#include <asm/proto.h>
#include <asm/mtrr.h>
+#include <asm/page.h>
+#include <asm/mce.h>
#include <asm/xcr.h>
#include <asm/suspend.h>
#include <asm/debugreg.h>
-static void fix_processor_context(void);
+#ifdef CONFIG_X86_32
+static struct saved_context saved_context;
+unsigned long saved_context_ebx;
+unsigned long saved_context_esp, saved_context_ebp;
+unsigned long saved_context_esi, saved_context_edi;
+unsigned long saved_context_eflags;
+#else
+/* CONFIG_X86_64 */
struct saved_context saved_context;
+#endif
/**
* __save_processor_state - save CPU registers before creating a
@@ -39,19 +49,35 @@ struct saved_context saved_context;
*/
static void __save_processor_state(struct saved_context *ctxt)
{
+#ifdef CONFIG_X86_32
+ mtrr_save_fixed_ranges(NULL);
+#endif
kernel_fpu_begin();
/*
* descriptor tables
*/
+#ifdef CONFIG_X86_32
+ store_gdt(&ctxt->gdt);
+ store_idt(&ctxt->idt);
+#else
+/* CONFIG_X86_64 */
store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
store_idt((struct desc_ptr *)&ctxt->idt_limit);
+#endif
store_tr(ctxt->tr);
/* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
/*
* segment registers
*/
+#ifdef CONFIG_X86_32
+ savesegment(es, ctxt->es);
+ savesegment(fs, ctxt->fs);
+ savesegment(gs, ctxt->gs);
+ savesegment(ss, ctxt->ss);
+#else
+/* CONFIG_X86_64 */
asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds));
asm volatile ("movw %%es, %0" : "=m" (ctxt->es));
asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs));
@@ -63,31 +89,68 @@ static void __save_processor_state(struct saved_context *ctxt)
rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
mtrr_save_fixed_ranges(NULL);
+ rdmsrl(MSR_EFER, ctxt->efer);
+#endif
+
/*
* control registers
*/
- rdmsrl(MSR_EFER, ctxt->efer);
ctxt->cr0 = read_cr0();
ctxt->cr2 = read_cr2();
ctxt->cr3 = read_cr3();
+#ifdef CONFIG_X86_32
+ ctxt->cr4 = read_cr4_safe();
+#else
+/* CONFIG_X86_64 */
ctxt->cr4 = read_cr4();
ctxt->cr8 = read_cr8();
+#endif
hw_breakpoint_disable();
}
+/* Needed by apm.c */
void save_processor_state(void)
{
__save_processor_state(&saved_context);
}
+#ifdef CONFIG_X86_32
+EXPORT_SYMBOL(save_processor_state);
+#endif
static void do_fpu_end(void)
{
/*
- * Restore FPU regs if necessary
+ * Restore FPU regs if necessary.
*/
kernel_fpu_end();
}
+static void fix_processor_context(void)
+{
+ int cpu = smp_processor_id();
+ struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+ 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.
+ */
+
+#ifdef CONFIG_X86_64
+ get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
+
+ syscall_init(); /* This sets MSR_*STAR and related */
+#endif
+ load_TR_desc(); /* This does ltr */
+ load_LDT(&current->active_mm->context); /* This does lldt */
+
+ /*
+ * Now maybe reload the debug registers
+ */
+ load_debug_registers();
+}
+
/**
* __restore_processor_state - restore the contents of CPU registers saved
* by __save_processor_state()
@@ -98,9 +161,16 @@ static void __restore_processor_state(struct saved_context *ctxt)
/*
* control registers
*/
+ /* cr4 was introduced in the Pentium CPU */
+#ifdef CONFIG_X86_32
+ if (ctxt->cr4)
+ write_cr4(ctxt->cr4);
+#else
+/* CONFIG X86_64 */
wrmsrl(MSR_EFER, ctxt->efer);
write_cr8(ctxt->cr8);
write_cr4(ctxt->cr4);
+#endif
write_cr3(ctxt->cr3);
write_cr2(ctxt->cr2);
write_cr0(ctxt->cr0);
@@ -109,13 +179,31 @@ static void __restore_processor_state(struct saved_context *ctxt)
* now restore the descriptor tables to their proper values
* ltr is done i fix_processor_context().
*/
+#ifdef CONFIG_X86_32
+ load_gdt(&ctxt->gdt);
+ load_idt(&ctxt->idt);
+#else
+/* CONFIG_X86_64 */
load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
load_idt((const struct desc_ptr *)&ctxt->idt_limit);
-
+#endif
/*
* segment registers
*/
+#ifdef CONFIG_X86_32
+ loadsegment(es, ctxt->es);
+ loadsegment(fs, ctxt->fs);
+ loadsegment(gs, ctxt->gs);
+ loadsegment(ss, ctxt->ss);
+
+ /*
+ * sysenter MSRs
+ */
+ if (boot_cpu_has(X86_FEATURE_SEP))
+ enable_sep_cpu();
+#else
+/* CONFIG_X86_64 */
asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
asm volatile ("movw %0, %%fs" :: "r" (ctxt->fs));
@@ -125,6 +213,7 @@ static void __restore_processor_state(struct saved_context *ctxt)
wrmsrl(MSR_FS_BASE, ctxt->fs_base);
wrmsrl(MSR_GS_BASE, ctxt->gs_base);
wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
+#endif
/*
* restore XCR0 for xsave capable cpu's.
@@ -136,33 +225,17 @@ static void __restore_processor_state(struct saved_context *ctxt)
do_fpu_end();
mtrr_ap_init();
+
+#ifdef CONFIG_X86_32
+ mcheck_init(&boot_cpu_data);
+#endif
}
+/* Needed by apm.c */
void restore_processor_state(void)
{
__restore_processor_state(&saved_context);
}
-
-static void fix_processor_context(void)
-{
- int cpu = smp_processor_id();
- struct tss_struct *t = &per_cpu(init_tss, cpu);
-
- /*
- * This just modifies memory; should not be necessary. But... This
- * is necessary, because 386 hardware has concept of busy TSS or some
- * similar stupidity.
- */
- set_tss_desc(cpu, t);
-
- get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
-
- syscall_init(); /* This sets MSR_*STAR and related */
- load_TR_desc(); /* This does ltr */
- load_LDT(&current->active_mm->context); /* This does lldt */
-
- /*
- * Now maybe reload the debug registers
- */
- load_debug_registers();
-}
+#ifdef CONFIG_X86_32
+EXPORT_SYMBOL(restore_processor_state);
+#endif
diff --git a/arch/x86/power/cpu_32.c b/arch/x86/power/cpu_32.c
deleted file mode 100644
index 2bc3b016de9..00000000000
--- a/arch/x86/power/cpu_32.c
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * Suspend support specific for i386.
- *
- * Distribute under GPLv2
- *
- * Copyright (c) 2002 Pavel Machek <pavel@suse.cz>
- * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
- */
-
-#include <linux/module.h>
-#include <linux/suspend.h>
-#include <asm/mtrr.h>
-#include <asm/mce.h>
-#include <asm/xcr.h>
-#include <asm/suspend.h>
-#include <asm/debugreg.h>
-
-static struct saved_context saved_context;
-
-unsigned long saved_context_ebx;
-unsigned long saved_context_esp, saved_context_ebp;
-unsigned long saved_context_esi, saved_context_edi;
-unsigned long saved_context_eflags;
-
-static void __save_processor_state(struct saved_context *ctxt)
-{
- mtrr_save_fixed_ranges(NULL);
- kernel_fpu_begin();
-
- /*
- * descriptor tables
- */
- store_gdt(&ctxt->gdt);
- store_idt(&ctxt->idt);
- store_tr(ctxt->tr);
-
- /*
- * segment registers
- */
- savesegment(es, ctxt->es);
- savesegment(fs, ctxt->fs);
- savesegment(gs, ctxt->gs);
- savesegment(ss, ctxt->ss);
-
- /*
- * control registers
- */
- ctxt->cr0 = read_cr0();
- ctxt->cr2 = read_cr2();
- ctxt->cr3 = read_cr3();
- ctxt->cr4 = read_cr4_safe();
- hw_breakpoint_disable();
-}
-
-/* Needed by apm.c */
-void save_processor_state(void)
-{
- __save_processor_state(&saved_context);
-}
-EXPORT_SYMBOL(save_processor_state);
-
-static void do_fpu_end(void)
-{
- /*
- * Restore FPU regs if necessary.
- */
- kernel_fpu_end();
-}
-
-static void fix_processor_context(void)
-{
- int cpu = smp_processor_id();
- struct tss_struct *t = &per_cpu(init_tss, cpu);
-
- 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.
- */
-
- load_TR_desc(); /* This does ltr */
- load_LDT(&current->active_mm->context); /* This does lldt */
-
- /*
- * Now maybe reload the debug registers
- */
- load_debug_registers();
-}
-
-static void __restore_processor_state(struct saved_context *ctxt)
-{
- /*
- * control registers
- */
- /* cr4 was introduced in the Pentium CPU */
- if (ctxt->cr4)
- write_cr4(ctxt->cr4);
- write_cr3(ctxt->cr3);
- write_cr2(ctxt->cr2);
- write_cr0(ctxt->cr0);
-
- /*
- * now restore the descriptor tables to their proper values
- * ltr is done i fix_processor_context().
- */
- load_gdt(&ctxt->gdt);
- load_idt(&ctxt->idt);
-
- /*
- * segment registers
- */
- loadsegment(es, ctxt->es);
- loadsegment(fs, ctxt->fs);
- loadsegment(gs, ctxt->gs);
- loadsegment(ss, ctxt->ss);
-
- /*
- * sysenter MSRs
- */
- if (boot_cpu_has(X86_FEATURE_SEP))
- enable_sep_cpu();
-
- /*
- * restore XCR0 for xsave capable cpu's.
- */
- if (cpu_has_xsave)
- xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);
-
- fix_processor_context();
- do_fpu_end();
- mtrr_ap_init();
- mcheck_init(&boot_cpu_data);
-}
-
-/* Needed by apm.c */
-void restore_processor_state(void)
-{
- __restore_processor_state(&saved_context);
-}
-EXPORT_SYMBOL(restore_processor_state);