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authorRafael J. Wysocki <rjw@sisk.pl>2007-10-23 22:37:24 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-23 22:37:24 +0200
commit0de80bcc2baed116a569c38cbc38c5dcb945d14d (patch)
tree5eef7beda7307be2e8949f1bf0e7f84799d8ae31
parentef685298b4b3dead1efa1d47cd27ced0f2673254 (diff)
downloadlinux-stericsson-0de80bcc2baed116a569c38cbc38c5dcb945d14d.tar.gz
x86: Save registers in saved_context during suspend and hibernation
During hibernation and suspend on x86_64 save CPU registers in the saved_context structure rather than in a handful of separate variables. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/kernel/acpi/wakeup_64.S101
-rw-r--r--arch/x86/kernel/asm-offsets_64.c28
-rw-r--r--arch/x86/kernel/suspend_64.c6
-rw-r--r--arch/x86/kernel/suspend_asm_64.S72
-rw-r--r--include/asm-x86/suspend_64.h23
5 files changed, 125 insertions, 105 deletions
diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S
index 55608ec2ed72..5ed3bc5c61d7 100644
--- a/arch/x86/kernel/acpi/wakeup_64.S
+++ b/arch/x86/kernel/acpi/wakeup_64.S
@@ -4,6 +4,7 @@
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/msr.h>
+#include <asm/asm-offsets.h>
# Copyright 2003 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
#
@@ -342,31 +343,32 @@ do_suspend_lowlevel:
xorl %eax, %eax
call save_processor_state
- movq %rsp, saved_context_esp(%rip)
- movq %rax, saved_context_eax(%rip)
- movq %rbx, saved_context_ebx(%rip)
- movq %rcx, saved_context_ecx(%rip)
- movq %rdx, saved_context_edx(%rip)
- movq %rbp, saved_context_ebp(%rip)
- movq %rsi, saved_context_esi(%rip)
- movq %rdi, saved_context_edi(%rip)
- movq %r8, saved_context_r08(%rip)
- movq %r9, saved_context_r09(%rip)
- movq %r10, saved_context_r10(%rip)
- movq %r11, saved_context_r11(%rip)
- movq %r12, saved_context_r12(%rip)
- movq %r13, saved_context_r13(%rip)
- movq %r14, saved_context_r14(%rip)
- movq %r15, saved_context_r15(%rip)
- pushfq ; popq saved_context_eflags(%rip)
+ movq $saved_context, %rax
+ movq %rsp, pt_regs_rsp(%rax)
+ movq %rbp, pt_regs_rbp(%rax)
+ movq %rsi, pt_regs_rsi(%rax)
+ movq %rdi, pt_regs_rdi(%rax)
+ movq %rbx, pt_regs_rbx(%rax)
+ movq %rcx, pt_regs_rcx(%rax)
+ movq %rdx, pt_regs_rdx(%rax)
+ movq %r8, pt_regs_r8(%rax)
+ movq %r9, pt_regs_r9(%rax)
+ movq %r10, pt_regs_r10(%rax)
+ movq %r11, pt_regs_r11(%rax)
+ movq %r12, pt_regs_r12(%rax)
+ movq %r13, pt_regs_r13(%rax)
+ movq %r14, pt_regs_r14(%rax)
+ movq %r15, pt_regs_r15(%rax)
+ pushfq
+ popq pt_regs_eflags(%rax)
movq $.L97, saved_rip(%rip)
- movq %rsp,saved_rsp
- movq %rbp,saved_rbp
- movq %rbx,saved_rbx
- movq %rdi,saved_rdi
- movq %rsi,saved_rsi
+ movq %rsp, saved_rsp
+ movq %rbp, saved_rbp
+ movq %rbx, saved_rbx
+ movq %rdi, saved_rdi
+ movq %rsi, saved_rsi
addq $8, %rsp
movl $3, %edi
@@ -377,32 +379,35 @@ do_suspend_lowlevel:
.L99:
.align 4
movl $24, %eax
- movw %ax, %ds
- movq saved_context+58(%rip), %rax
- movq %rax, %cr4
- movq saved_context+50(%rip), %rax
- movq %rax, %cr3
- movq saved_context+42(%rip), %rax
- movq %rax, %cr2
- movq saved_context+34(%rip), %rax
- movq %rax, %cr0
- pushq saved_context_eflags(%rip) ; popfq
- movq saved_context_esp(%rip), %rsp
- movq saved_context_ebp(%rip), %rbp
- movq saved_context_eax(%rip), %rax
- movq saved_context_ebx(%rip), %rbx
- movq saved_context_ecx(%rip), %rcx
- movq saved_context_edx(%rip), %rdx
- movq saved_context_esi(%rip), %rsi
- movq saved_context_edi(%rip), %rdi
- movq saved_context_r08(%rip), %r8
- movq saved_context_r09(%rip), %r9
- movq saved_context_r10(%rip), %r10
- movq saved_context_r11(%rip), %r11
- movq saved_context_r12(%rip), %r12
- movq saved_context_r13(%rip), %r13
- movq saved_context_r14(%rip), %r14
- movq saved_context_r15(%rip), %r15
+ movw %ax, %ds
+
+ /* We don't restore %rax, it must be 0 anyway */
+ movq $saved_context, %rax
+ movq saved_context_cr4(%rax), %rbx
+ movq %rbx, %cr4
+ movq saved_context_cr3(%rax), %rbx
+ movq %rbx, %cr3
+ movq saved_context_cr2(%rax), %rbx
+ movq %rbx, %cr2
+ movq saved_context_cr0(%rax), %rbx
+ movq %rbx, %cr0
+ pushq pt_regs_eflags(%rax)
+ popfq
+ movq pt_regs_rsp(%rax), %rsp
+ movq pt_regs_rbp(%rax), %rbp
+ movq pt_regs_rsi(%rax), %rsi
+ movq pt_regs_rdi(%rax), %rdi
+ movq pt_regs_rbx(%rax), %rbx
+ movq pt_regs_rcx(%rax), %rcx
+ movq pt_regs_rdx(%rax), %rdx
+ movq pt_regs_r8(%rax), %r8
+ movq pt_regs_r9(%rax), %r9
+ movq pt_regs_r10(%rax), %r10
+ movq pt_regs_r11(%rax), %r11
+ movq pt_regs_r12(%rax), %r12
+ movq pt_regs_r13(%rax), %r13
+ movq pt_regs_r14(%rax), %r14
+ movq pt_regs_r15(%rax), %r15
xorl %eax, %eax
addq $8, %rsp
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index 778953bc636c..7e50bda565b4 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -76,6 +76,34 @@ int main(void)
DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
DEFINE(pbe_next, offsetof(struct pbe, next));
BLANK();
+#define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
+ ENTRY(rbx);
+ ENTRY(rbx);
+ ENTRY(rcx);
+ ENTRY(rdx);
+ ENTRY(rsp);
+ ENTRY(rbp);
+ ENTRY(rsi);
+ ENTRY(rdi);
+ ENTRY(r8);
+ ENTRY(r9);
+ ENTRY(r10);
+ ENTRY(r11);
+ ENTRY(r12);
+ ENTRY(r13);
+ ENTRY(r14);
+ ENTRY(r15);
+ ENTRY(eflags);
+ BLANK();
+#undef ENTRY
+#define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
+ ENTRY(cr0);
+ ENTRY(cr2);
+ ENTRY(cr3);
+ ENTRY(cr4);
+ ENTRY(cr8);
+ BLANK();
+#undef ENTRY
DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
BLANK();
DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c
index bc9f59c246fd..db284ef44d53 100644
--- a/arch/x86/kernel/suspend_64.c
+++ b/arch/x86/kernel/suspend_64.c
@@ -19,12 +19,6 @@ extern const void __nosave_begin, __nosave_end;
struct saved_context saved_context;
-unsigned long saved_context_eax, saved_context_ebx, saved_context_ecx, saved_context_edx;
-unsigned long saved_context_esp, saved_context_ebp, saved_context_esi, saved_context_edi;
-unsigned long saved_context_r08, saved_context_r09, saved_context_r10, saved_context_r11;
-unsigned long saved_context_r12, saved_context_r13, saved_context_r14, saved_context_r15;
-unsigned long saved_context_eflags;
-
void __save_processor_state(struct saved_context *ctxt)
{
kernel_fpu_begin();
diff --git a/arch/x86/kernel/suspend_asm_64.S b/arch/x86/kernel/suspend_asm_64.S
index 48344b666d2c..72f952103e50 100644
--- a/arch/x86/kernel/suspend_asm_64.S
+++ b/arch/x86/kernel/suspend_asm_64.S
@@ -17,24 +17,24 @@
#include <asm/asm-offsets.h>
ENTRY(swsusp_arch_suspend)
-
- movq %rsp, saved_context_esp(%rip)
- movq %rax, saved_context_eax(%rip)
- movq %rbx, saved_context_ebx(%rip)
- movq %rcx, saved_context_ecx(%rip)
- movq %rdx, saved_context_edx(%rip)
- movq %rbp, saved_context_ebp(%rip)
- movq %rsi, saved_context_esi(%rip)
- movq %rdi, saved_context_edi(%rip)
- movq %r8, saved_context_r08(%rip)
- movq %r9, saved_context_r09(%rip)
- movq %r10, saved_context_r10(%rip)
- movq %r11, saved_context_r11(%rip)
- movq %r12, saved_context_r12(%rip)
- movq %r13, saved_context_r13(%rip)
- movq %r14, saved_context_r14(%rip)
- movq %r15, saved_context_r15(%rip)
- pushfq ; popq saved_context_eflags(%rip)
+ movq $saved_context, %rax
+ movq %rsp, pt_regs_rsp(%rax)
+ movq %rbp, pt_regs_rbp(%rax)
+ movq %rsi, pt_regs_rsi(%rax)
+ movq %rdi, pt_regs_rdi(%rax)
+ movq %rbx, pt_regs_rbx(%rax)
+ movq %rcx, pt_regs_rcx(%rax)
+ movq %rdx, pt_regs_rdx(%rax)
+ movq %r8, pt_regs_r8(%rax)
+ movq %r9, pt_regs_r9(%rax)
+ movq %r10, pt_regs_r10(%rax)
+ movq %r11, pt_regs_r11(%rax)
+ movq %r12, pt_regs_r12(%rax)
+ movq %r13, pt_regs_r13(%rax)
+ movq %r14, pt_regs_r14(%rax)
+ movq %r15, pt_regs_r15(%rax)
+ pushfq
+ popq pt_regs_eflags(%rax)
/* save the address of restore_registers */
movq $restore_registers, %rax
@@ -113,23 +113,25 @@ ENTRY(restore_registers)
movq %rcx, %cr3
movq %rax, %cr4; # turn PGE back on
- movq saved_context_esp(%rip), %rsp
- movq saved_context_ebp(%rip), %rbp
- /* restore GPRs (we don't restore %rax, it must be 0 anyway) */
- movq saved_context_ebx(%rip), %rbx
- movq saved_context_ecx(%rip), %rcx
- movq saved_context_edx(%rip), %rdx
- movq saved_context_esi(%rip), %rsi
- movq saved_context_edi(%rip), %rdi
- movq saved_context_r08(%rip), %r8
- movq saved_context_r09(%rip), %r9
- movq saved_context_r10(%rip), %r10
- movq saved_context_r11(%rip), %r11
- movq saved_context_r12(%rip), %r12
- movq saved_context_r13(%rip), %r13
- movq saved_context_r14(%rip), %r14
- movq saved_context_r15(%rip), %r15
- pushq saved_context_eflags(%rip) ; popfq
+ /* We don't restore %rax, it must be 0 anyway */
+ movq $saved_context, %rax
+ movq pt_regs_rsp(%rax), %rsp
+ movq pt_regs_rbp(%rax), %rbp
+ movq pt_regs_rsi(%rax), %rsi
+ movq pt_regs_rdi(%rax), %rdi
+ movq pt_regs_rbx(%rax), %rbx
+ movq pt_regs_rcx(%rax), %rcx
+ movq pt_regs_rdx(%rax), %rdx
+ movq pt_regs_r8(%rax), %r8
+ movq pt_regs_r9(%rax), %r9
+ movq pt_regs_r10(%rax), %r10
+ movq pt_regs_r11(%rax), %r11
+ movq pt_regs_r12(%rax), %r12
+ movq pt_regs_r13(%rax), %r13
+ movq pt_regs_r14(%rax), %r14
+ movq pt_regs_r15(%rax), %r15
+ pushq pt_regs_eflags(%rax)
+ popfq
xorq %rax, %rax
diff --git a/include/asm-x86/suspend_64.h b/include/asm-x86/suspend_64.h
index 9440a7a1b99a..c505a76bcf6e 100644
--- a/include/asm-x86/suspend_64.h
+++ b/include/asm-x86/suspend_64.h
@@ -3,6 +3,9 @@
* Based on code
* Copyright 2001 Patrick Mochel <mochel@osdl.org>
*/
+#ifndef __ASM_X86_64_SUSPEND_H
+#define __ASM_X86_64_SUSPEND_H
+
#include <asm/desc.h>
#include <asm/i387.h>
@@ -12,8 +15,9 @@ arch_prepare_suspend(void)
return 0;
}
-/* Image of the saved processor state. If you touch this, fix acpi_wakeup.S. */
+/* Image of the saved processor state. If you touch this, fix acpi/wakeup.S. */
struct saved_context {
+ struct pt_regs regs;
u16 ds, es, fs, gs, ss;
unsigned long gs_base, gs_kernel_base, fs_base;
unsigned long cr0, cr2, cr3, cr4, cr8;
@@ -29,29 +33,16 @@ struct saved_context {
unsigned long tr;
unsigned long safety;
unsigned long return_address;
- unsigned long eflags;
} __attribute__((packed));
-/* We'll access these from assembly, so we'd better have them outside struct */
-extern unsigned long saved_context_eax, saved_context_ebx, saved_context_ecx, saved_context_edx;
-extern unsigned long saved_context_esp, saved_context_ebp, saved_context_esi, saved_context_edi;
-extern unsigned long saved_context_r08, saved_context_r09, saved_context_r10, saved_context_r11;
-extern unsigned long saved_context_r12, saved_context_r13, saved_context_r14, saved_context_r15;
-extern unsigned long saved_context_eflags;
-
#define loaddebug(thread,register) \
set_debugreg((thread)->debugreg##register, register)
extern void fix_processor_context(void);
-extern unsigned long saved_rip;
-extern unsigned long saved_rsp;
-extern unsigned long saved_rbp;
-extern unsigned long saved_rbx;
-extern unsigned long saved_rsi;
-extern unsigned long saved_rdi;
-
/* routines for saving/restoring kernel state */
extern int acpi_save_state_mem(void);
extern char core_restore_code;
extern char restore_registers;
+
+#endif /* __ASM_X86_64_SUSPEND_H */