diff options
Diffstat (limited to 'arch/x86/kernel/acpi/wakeup_64.S')
| -rw-r--r-- | arch/x86/kernel/acpi/wakeup_64.S | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S new file mode 100644 index 000000000..c8daa92f3 --- /dev/null +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -0,0 +1,139 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +.text +#include <linux/linkage.h> +#include <asm/segment.h> +#include <asm/pgtable_types.h> +#include <asm/page_types.h> +#include <asm/msr.h> +#include <asm/asm-offsets.h> +#include <asm/frame.h> + +# Copyright 2003 Pavel Machek <pavel@suse.cz + +.code64 + /* + * Hooray, we are in Long 64-bit mode (but still running in low memory) + */ +SYM_FUNC_START(wakeup_long64) + movq saved_magic, %rax + movq $0x123456789abcdef0, %rdx + cmpq %rdx, %rax + je 2f + + /* stop here on a saved_magic mismatch */ + movq $0xbad6d61676963, %rcx +1: + jmp 1b +2: + movw $__KERNEL_DS, %ax + movw %ax, %ss + movw %ax, %ds + movw %ax, %es + movw %ax, %fs + movw %ax, %gs + movq saved_rsp, %rsp + + movq saved_rbx, %rbx + movq saved_rdi, %rdi + movq saved_rsi, %rsi + movq saved_rbp, %rbp + + movq saved_rip, %rax + jmp *%rax +SYM_FUNC_END(wakeup_long64) + +SYM_FUNC_START(do_suspend_lowlevel) + FRAME_BEGIN + subq $8, %rsp + xorl %eax, %eax + call save_processor_state + + movq $saved_context, %rax + movq %rsp, pt_regs_sp(%rax) + movq %rbp, pt_regs_bp(%rax) + movq %rsi, pt_regs_si(%rax) + movq %rdi, pt_regs_di(%rax) + movq %rbx, pt_regs_bx(%rax) + movq %rcx, pt_regs_cx(%rax) + movq %rdx, pt_regs_dx(%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_flags(%rax) + + movq $.Lresume_point, saved_rip(%rip) + + 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 + xorl %eax, %eax + call x86_acpi_enter_sleep_state + /* in case something went wrong, restore the machine status and go on */ + jmp .Lresume_point + + .align 4 +.Lresume_point: + /* 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_flags(%rax) + popfq + movq pt_regs_sp(%rax), %rsp + movq pt_regs_bp(%rax), %rbp + movq pt_regs_si(%rax), %rsi + movq pt_regs_di(%rax), %rdi + movq pt_regs_bx(%rax), %rbx + movq pt_regs_cx(%rax), %rcx + movq pt_regs_dx(%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 + +#ifdef CONFIG_KASAN + /* + * The suspend path may have poisoned some areas deeper in the stack, + * which we now need to unpoison. + */ + movq %rsp, %rdi + call kasan_unpoison_task_stack_below +#endif + + xorl %eax, %eax + addq $8, %rsp + FRAME_END + jmp restore_processor_state +SYM_FUNC_END(do_suspend_lowlevel) + +.data +saved_rbp: .quad 0 +saved_rsi: .quad 0 +saved_rdi: .quad 0 +saved_rbx: .quad 0 + +saved_rip: .quad 0 +saved_rsp: .quad 0 + +SYM_DATA(saved_magic, .quad 0) |