1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
4 * Based on code
5 * Copyright 2001 Patrick Mochel <mochel@osdl.org>
6 */
7 #ifndef _ASM_X86_SUSPEND_64_H
8 #define _ASM_X86_SUSPEND_64_H
9
10 #include <asm/desc.h>
11 #include <asm/fpu/api.h>
12
13 /*
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.
16 *
17 * If you modify it, fix arch/x86/kernel/acpi/wakeup_64.S and make sure that
18 * __save/__restore_processor_state(), defined in arch/x86/kernel/suspend_64.c,
19 * still work as required.
20 */
21 struct saved_context {
22 struct pt_regs regs;
23
24 /*
25 * User CS and SS are saved in current_pt_regs(). The rest of the
26 * segment selectors need to be saved and restored here.
27 */
28 u16 ds, es, fs, gs;
29
30 /*
31 * Usermode FSBASE and GSBASE may not match the fs and gs selectors,
32 * so we save them separately. We save the kernelmode GSBASE to
33 * restore percpu access after resume.
34 */
35 unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
36
37 unsigned long cr0, cr2, cr3, cr4;
38 u64 misc_enable;
39 bool misc_enable_saved;
40 struct saved_msrs saved_msrs;
41 unsigned long efer;
42 u16 gdt_pad; /* Unused */
43 struct desc_ptr gdt_desc;
44 u16 idt_pad;
45 struct desc_ptr idt;
46 u16 ldt;
47 u16 tss;
48 unsigned long tr;
49 unsigned long safety;
50 unsigned long return_address;
51 } __attribute__((packed));
52
53 #define loaddebug(thread,register) \
54 set_debugreg((thread)->debugreg##register, register)
55
56 /* routines for saving/restoring kernel state */
57 extern char core_restore_code[];
58 extern char restore_registers[];
59
60 #endif /* _ASM_X86_SUSPEND_64_H */