1 /* SPDX-License-Identifier: GPL-2.0 */
7 #ifndef _ASM_X86_SUSPEND_64_H
8 #define _ASM_X86_SUSPEND_64_H
11 #include <asm/fpu/api.h>
14 * Image of the saved processor state, used by the low level ACPI suspend to
15 * RAM code and by the low level hibernation code.
17 * If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S
18 * and make sure that __save/__restore_processor_state(), defined in
19 * arch/x86/power/cpu.c, still work as required.
21 * Because the structure is packed, make sure to avoid unaligned members. For
22 * optimisation purposes but also because tools like kmemleak only search for
23 * pointers that are aligned.
25 struct saved_context {
29 * User CS and SS are saved in current_pt_regs(). The rest of the
30 * segment selectors need to be saved and restored here.
35 * Usermode FSBASE and GSBASE may not match the fs and gs selectors,
36 * so we save them separately. We save the kernelmode GSBASE to
37 * restore percpu access after resume.
39 unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
41 unsigned long cr0, cr2, cr3, cr4;
43 struct saved_msrs saved_msrs;
45 u16 gdt_pad; /* Unused */
46 struct desc_ptr gdt_desc;
53 unsigned long return_address;
54 bool misc_enable_saved;
55 } __attribute__((packed));
57 #define loaddebug(thread,register) \
58 set_debugreg((thread)->debugreg##register, register)
60 /* routines for saving/restoring kernel state */
61 extern char core_restore_code[];
62 extern char restore_registers[];
64 #endif /* _ASM_X86_SUSPEND_64_H */