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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Copyright 2001-2003 Pavel Machek <pavel@suse.cz> | |
4 | * Based on code | |
5 | * Copyright 2001 Patrick Mochel <mochel@osdl.org> | |
6 | */ | |
1965aae3 PA |
7 | #ifndef _ASM_X86_SUSPEND_64_H |
8 | #define _ASM_X86_SUSPEND_64_H | |
0de80bcc | 9 | |
1da177e4 | 10 | #include <asm/desc.h> |
df6b35f4 | 11 | #include <asm/fpu/api.h> |
1da177e4 | 12 | |
5c9c9bec RW |
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 | * | |
b0b592cf MB |
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. | |
5c9c9bec | 24 | */ |
1da177e4 | 25 | struct saved_context { |
0de80bcc | 26 | struct pt_regs regs; |
7ee18d67 AL |
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 | ||
83b584d9 | 41 | unsigned long cr0, cr2, cr3, cr4; |
85a0e753 | 42 | u64 misc_enable; |
7a9c2dd0 | 43 | struct saved_msrs saved_msrs; |
3c321bce | 44 | unsigned long efer; |
cc456c4e KRW |
45 | u16 gdt_pad; /* Unused */ |
46 | struct desc_ptr gdt_desc; | |
1da177e4 | 47 | u16 idt_pad; |
090edbe2 | 48 | struct desc_ptr idt; |
1da177e4 LT |
49 | u16 ldt; |
50 | u16 tss; | |
51 | unsigned long tr; | |
52 | unsigned long safety; | |
53 | unsigned long return_address; | |
b0b592cf | 54 | bool misc_enable_saved; |
1da177e4 LT |
55 | } __attribute__((packed)); |
56 | ||
1da177e4 | 57 | #define loaddebug(thread,register) \ |
2b514e74 | 58 | set_debugreg((thread)->debugreg##register, register) |
1da177e4 | 59 | |
1da177e4 | 60 | /* routines for saving/restoring kernel state */ |
c0944883 KC |
61 | extern char core_restore_code[]; |
62 | extern char restore_registers[]; | |
0de80bcc | 63 | |
1965aae3 | 64 | #endif /* _ASM_X86_SUSPEND_64_H */ |