1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
5 * Copyright 2001 Patrick Mochel <mochel@osdl.org>
7 #ifndef _ASM_X86_SUSPEND_64_H
8 #define _ASM_X86_SUSPEND_64_H
11 #include <asm/fpu/api.h>
15 * Image of the saved processor state, used by the low level ACPI suspend to
16 * RAM code and by the low level hibernation code.
18 * If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S
19 * and make sure that __save/__restore_processor_state(), defined in
20 * arch/x86/power/cpu.c, still work as required.
22 * Because the structure is packed, make sure to avoid unaligned members. For
23 * optimisation purposes but also because tools like kmemleak only search for
24 * pointers that are aligned.
26 struct saved_context {
30 * User CS and SS are saved in current_pt_regs(). The rest of the
31 * segment selectors need to be saved and restored here.
36 * Usermode FSBASE and GSBASE may not match the fs and gs selectors,
37 * so we save them separately. We save the kernelmode GSBASE to
38 * restore percpu access after resume.
40 unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
42 unsigned long cr0, cr2, cr3, cr4;
44 struct saved_msrs saved_msrs;
46 u16 gdt_pad; /* Unused */
47 struct desc_ptr gdt_desc;
54 unsigned long return_address;
55 bool misc_enable_saved;
56 } __attribute__((packed));
58 #define loaddebug(thread,register) \
59 set_debugreg((thread)->debugreg##register, register)
61 /* routines for saving/restoring kernel state */
62 extern char core_restore_code[];
63 extern char restore_registers[];
65 #endif /* _ASM_X86_SUSPEND_64_H */