Merge tag 'for-linux-6.12-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / arch / x86 / include / asm / suspend_64.h
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b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
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2/*
3 * Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
4 * Based on code
5 * Copyright 2001 Patrick Mochel <mochel@osdl.org>
6 */
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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
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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 *
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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 25struct saved_context {
0de80bcc 26 struct pt_regs regs;
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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;
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45 u16 gdt_pad; /* Unused */
46 struct desc_ptr gdt_desc;
1da177e4 47 u16 idt_pad;
090edbe2 48 struct desc_ptr idt;
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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;
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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 */
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61extern char core_restore_code[];
62extern char restore_registers[];
0de80bcc 63
1965aae3 64#endif /* _ASM_X86_SUSPEND_64_H */