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>
This commit is contained in:
Rafael J. Wysocki
Thomas Gleixner
parent
ef685298b4
commit
0de80bcc2b
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@ -4,6 +4,7 @@
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/msr.h>
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#include <asm/asm-offsets.h>
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# Copyright 2003 Pavel Machek <pavel@suse.cz>, distribute under GPLv2
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#
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@ -342,31 +343,32 @@ do_suspend_lowlevel:
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xorl %eax, %eax
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call save_processor_state
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movq %rsp, saved_context_esp(%rip)
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movq %rax, saved_context_eax(%rip)
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movq %rbx, saved_context_ebx(%rip)
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movq %rcx, saved_context_ecx(%rip)
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movq %rdx, saved_context_edx(%rip)
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movq %rbp, saved_context_ebp(%rip)
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movq %rsi, saved_context_esi(%rip)
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movq %rdi, saved_context_edi(%rip)
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movq %r8, saved_context_r08(%rip)
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movq %r9, saved_context_r09(%rip)
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movq %r10, saved_context_r10(%rip)
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movq %r11, saved_context_r11(%rip)
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movq %r12, saved_context_r12(%rip)
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movq %r13, saved_context_r13(%rip)
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movq %r14, saved_context_r14(%rip)
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movq %r15, saved_context_r15(%rip)
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pushfq ; popq saved_context_eflags(%rip)
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movq $saved_context, %rax
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movq %rsp, pt_regs_rsp(%rax)
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movq %rbp, pt_regs_rbp(%rax)
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movq %rsi, pt_regs_rsi(%rax)
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movq %rdi, pt_regs_rdi(%rax)
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movq %rbx, pt_regs_rbx(%rax)
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movq %rcx, pt_regs_rcx(%rax)
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movq %rdx, pt_regs_rdx(%rax)
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movq %r8, pt_regs_r8(%rax)
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movq %r9, pt_regs_r9(%rax)
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movq %r10, pt_regs_r10(%rax)
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movq %r11, pt_regs_r11(%rax)
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movq %r12, pt_regs_r12(%rax)
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movq %r13, pt_regs_r13(%rax)
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movq %r14, pt_regs_r14(%rax)
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movq %r15, pt_regs_r15(%rax)
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pushfq
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popq pt_regs_eflags(%rax)
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movq $.L97, saved_rip(%rip)
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movq %rsp,saved_rsp
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movq %rbp,saved_rbp
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movq %rbx,saved_rbx
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movq %rdi,saved_rdi
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movq %rsi,saved_rsi
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movq %rsp, saved_rsp
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movq %rbp, saved_rbp
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movq %rbx, saved_rbx
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movq %rdi, saved_rdi
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movq %rsi, saved_rsi
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addq $8, %rsp
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movl $3, %edi
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@ -377,32 +379,35 @@ do_suspend_lowlevel:
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.L99:
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.align 4
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movl $24, %eax
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movw %ax, %ds
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movq saved_context+58(%rip), %rax
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movq %rax, %cr4
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movq saved_context+50(%rip), %rax
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movq %rax, %cr3
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movq saved_context+42(%rip), %rax
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movq %rax, %cr2
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movq saved_context+34(%rip), %rax
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movq %rax, %cr0
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pushq saved_context_eflags(%rip) ; popfq
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movq saved_context_esp(%rip), %rsp
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movq saved_context_ebp(%rip), %rbp
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movq saved_context_eax(%rip), %rax
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movq saved_context_ebx(%rip), %rbx
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movq saved_context_ecx(%rip), %rcx
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movq saved_context_edx(%rip), %rdx
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movq saved_context_esi(%rip), %rsi
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movq saved_context_edi(%rip), %rdi
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movq saved_context_r08(%rip), %r8
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movq saved_context_r09(%rip), %r9
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movq saved_context_r10(%rip), %r10
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movq saved_context_r11(%rip), %r11
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movq saved_context_r12(%rip), %r12
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movq saved_context_r13(%rip), %r13
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movq saved_context_r14(%rip), %r14
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movq saved_context_r15(%rip), %r15
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movw %ax, %ds
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/* We don't restore %rax, it must be 0 anyway */
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movq $saved_context, %rax
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movq saved_context_cr4(%rax), %rbx
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movq %rbx, %cr4
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movq saved_context_cr3(%rax), %rbx
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movq %rbx, %cr3
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movq saved_context_cr2(%rax), %rbx
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movq %rbx, %cr2
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movq saved_context_cr0(%rax), %rbx
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movq %rbx, %cr0
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pushq pt_regs_eflags(%rax)
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popfq
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movq pt_regs_rsp(%rax), %rsp
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movq pt_regs_rbp(%rax), %rbp
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movq pt_regs_rsi(%rax), %rsi
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movq pt_regs_rdi(%rax), %rdi
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movq pt_regs_rbx(%rax), %rbx
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movq pt_regs_rcx(%rax), %rcx
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movq pt_regs_rdx(%rax), %rdx
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movq pt_regs_r8(%rax), %r8
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movq pt_regs_r9(%rax), %r9
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movq pt_regs_r10(%rax), %r10
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movq pt_regs_r11(%rax), %r11
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movq pt_regs_r12(%rax), %r12
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movq pt_regs_r13(%rax), %r13
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movq pt_regs_r14(%rax), %r14
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movq pt_regs_r15(%rax), %r15
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xorl %eax, %eax
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addq $8, %rsp
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@ -76,6 +76,34 @@ int main(void)
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DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
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DEFINE(pbe_next, offsetof(struct pbe, next));
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BLANK();
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#define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
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ENTRY(rbx);
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ENTRY(rbx);
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ENTRY(rcx);
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ENTRY(rdx);
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ENTRY(rsp);
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ENTRY(rbp);
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ENTRY(rsi);
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ENTRY(rdi);
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ENTRY(r8);
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ENTRY(r9);
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ENTRY(r10);
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ENTRY(r11);
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ENTRY(r12);
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ENTRY(r13);
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ENTRY(r14);
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ENTRY(r15);
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ENTRY(eflags);
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BLANK();
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#undef ENTRY
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#define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
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ENTRY(cr0);
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ENTRY(cr2);
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ENTRY(cr3);
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ENTRY(cr4);
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ENTRY(cr8);
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BLANK();
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#undef ENTRY
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DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
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BLANK();
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DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
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@ -19,12 +19,6 @@ extern const void __nosave_begin, __nosave_end;
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struct saved_context saved_context;
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unsigned long saved_context_eax, saved_context_ebx, saved_context_ecx, saved_context_edx;
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unsigned long saved_context_esp, saved_context_ebp, saved_context_esi, saved_context_edi;
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unsigned long saved_context_r08, saved_context_r09, saved_context_r10, saved_context_r11;
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unsigned long saved_context_r12, saved_context_r13, saved_context_r14, saved_context_r15;
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unsigned long saved_context_eflags;
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void __save_processor_state(struct saved_context *ctxt)
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{
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kernel_fpu_begin();
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@ -17,24 +17,24 @@
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#include <asm/asm-offsets.h>
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ENTRY(swsusp_arch_suspend)
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movq %rsp, saved_context_esp(%rip)
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movq %rax, saved_context_eax(%rip)
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movq %rbx, saved_context_ebx(%rip)
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movq %rcx, saved_context_ecx(%rip)
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movq %rdx, saved_context_edx(%rip)
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movq %rbp, saved_context_ebp(%rip)
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movq %rsi, saved_context_esi(%rip)
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movq %rdi, saved_context_edi(%rip)
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movq %r8, saved_context_r08(%rip)
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movq %r9, saved_context_r09(%rip)
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movq %r10, saved_context_r10(%rip)
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movq %r11, saved_context_r11(%rip)
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movq %r12, saved_context_r12(%rip)
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movq %r13, saved_context_r13(%rip)
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movq %r14, saved_context_r14(%rip)
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movq %r15, saved_context_r15(%rip)
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pushfq ; popq saved_context_eflags(%rip)
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movq $saved_context, %rax
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movq %rsp, pt_regs_rsp(%rax)
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movq %rbp, pt_regs_rbp(%rax)
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movq %rsi, pt_regs_rsi(%rax)
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movq %rdi, pt_regs_rdi(%rax)
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movq %rbx, pt_regs_rbx(%rax)
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movq %rcx, pt_regs_rcx(%rax)
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movq %rdx, pt_regs_rdx(%rax)
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movq %r8, pt_regs_r8(%rax)
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movq %r9, pt_regs_r9(%rax)
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movq %r10, pt_regs_r10(%rax)
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movq %r11, pt_regs_r11(%rax)
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movq %r12, pt_regs_r12(%rax)
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movq %r13, pt_regs_r13(%rax)
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movq %r14, pt_regs_r14(%rax)
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movq %r15, pt_regs_r15(%rax)
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pushfq
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popq pt_regs_eflags(%rax)
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/* save the address of restore_registers */
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movq $restore_registers, %rax
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@ -113,23 +113,25 @@ ENTRY(restore_registers)
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movq %rcx, %cr3
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movq %rax, %cr4; # turn PGE back on
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movq saved_context_esp(%rip), %rsp
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movq saved_context_ebp(%rip), %rbp
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/* restore GPRs (we don't restore %rax, it must be 0 anyway) */
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movq saved_context_ebx(%rip), %rbx
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movq saved_context_ecx(%rip), %rcx
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movq saved_context_edx(%rip), %rdx
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movq saved_context_esi(%rip), %rsi
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movq saved_context_edi(%rip), %rdi
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movq saved_context_r08(%rip), %r8
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movq saved_context_r09(%rip), %r9
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movq saved_context_r10(%rip), %r10
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movq saved_context_r11(%rip), %r11
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movq saved_context_r12(%rip), %r12
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movq saved_context_r13(%rip), %r13
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movq saved_context_r14(%rip), %r14
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movq saved_context_r15(%rip), %r15
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pushq saved_context_eflags(%rip) ; popfq
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/* We don't restore %rax, it must be 0 anyway */
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movq $saved_context, %rax
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movq pt_regs_rsp(%rax), %rsp
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movq pt_regs_rbp(%rax), %rbp
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movq pt_regs_rsi(%rax), %rsi
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movq pt_regs_rdi(%rax), %rdi
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movq pt_regs_rbx(%rax), %rbx
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movq pt_regs_rcx(%rax), %rcx
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movq pt_regs_rdx(%rax), %rdx
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movq pt_regs_r8(%rax), %r8
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movq pt_regs_r9(%rax), %r9
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movq pt_regs_r10(%rax), %r10
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movq pt_regs_r11(%rax), %r11
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movq pt_regs_r12(%rax), %r12
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movq pt_regs_r13(%rax), %r13
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movq pt_regs_r14(%rax), %r14
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movq pt_regs_r15(%rax), %r15
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pushq pt_regs_eflags(%rax)
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popfq
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xorq %rax, %rax
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@ -3,6 +3,9 @@
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* Based on code
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* Copyright 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#ifndef __ASM_X86_64_SUSPEND_H
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#define __ASM_X86_64_SUSPEND_H
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#include <asm/desc.h>
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#include <asm/i387.h>
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@ -12,8 +15,9 @@ arch_prepare_suspend(void)
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return 0;
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}
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/* Image of the saved processor state. If you touch this, fix acpi_wakeup.S. */
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/* Image of the saved processor state. If you touch this, fix acpi/wakeup.S. */
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struct saved_context {
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struct pt_regs regs;
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u16 ds, es, fs, gs, ss;
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unsigned long gs_base, gs_kernel_base, fs_base;
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unsigned long cr0, cr2, cr3, cr4, cr8;
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@ -29,29 +33,16 @@ struct saved_context {
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unsigned long tr;
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unsigned long safety;
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unsigned long return_address;
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unsigned long eflags;
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} __attribute__((packed));
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/* We'll access these from assembly, so we'd better have them outside struct */
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extern unsigned long saved_context_eax, saved_context_ebx, saved_context_ecx, saved_context_edx;
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extern unsigned long saved_context_esp, saved_context_ebp, saved_context_esi, saved_context_edi;
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extern unsigned long saved_context_r08, saved_context_r09, saved_context_r10, saved_context_r11;
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extern unsigned long saved_context_r12, saved_context_r13, saved_context_r14, saved_context_r15;
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extern unsigned long saved_context_eflags;
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#define loaddebug(thread,register) \
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set_debugreg((thread)->debugreg##register, register)
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extern void fix_processor_context(void);
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extern unsigned long saved_rip;
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extern unsigned long saved_rsp;
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extern unsigned long saved_rbp;
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extern unsigned long saved_rbx;
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extern unsigned long saved_rsi;
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extern unsigned long saved_rdi;
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/* routines for saving/restoring kernel state */
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extern int acpi_save_state_mem(void);
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extern char core_restore_code;
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extern char restore_registers;
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#endif /* __ASM_X86_64_SUSPEND_H */
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