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, 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. |
20 | * |
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. |
24 | */ |
25 | struct saved_context { |
26 | struct pt_regs regs; |
27 | |
28 | /* |
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. |
31 | */ |
32 | u16 ds, es, fs, gs; |
33 | |
34 | /* |
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. |
38 | */ |
39 | unsigned long kernelmode_gs_base, usermode_gs_base, fs_base; |
40 | |
41 | unsigned long cr0, cr2, cr3, cr4; |
42 | u64 misc_enable; |
43 | struct saved_msrs saved_msrs; |
44 | unsigned long efer; |
45 | u16 gdt_pad; /* Unused */ |
46 | struct desc_ptr gdt_desc; |
47 | u16 idt_pad; |
48 | struct desc_ptr idt; |
49 | u16 ldt; |
50 | u16 tss; |
51 | unsigned long tr; |
52 | unsigned long safety; |
53 | unsigned long return_address; |
54 | bool misc_enable_saved; |
55 | } __attribute__((packed)); |
56 | |
57 | #define loaddebug(thread,register) \ |
58 | set_debugreg((thread)->debugreg##register, register) |
59 | |
60 | /* routines for saving/restoring kernel state */ |
61 | extern char core_restore_code[]; |
62 | extern char restore_registers[]; |
63 | |
64 | #endif /* _ASM_X86_SUSPEND_64_H */ |
65 | |