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 */
61