/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
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* Based on code
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* Copyright 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#ifndef _ASM_X86_SUSPEND_64_H
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#define _ASM_X86_SUSPEND_64_H
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#include <asm/desc.h>
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#include <asm/fpu/api.h>
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/*
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* Image of the saved processor state, used by the low level ACPI suspend to
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* RAM code and by the low level hibernation code.
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*
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* If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S
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* and make sure that __save/__restore_processor_state(), defined in
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* arch/x86/power/cpu.c, still work as required.
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*
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* Because the structure is packed, make sure to avoid unaligned members. For
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* optimisation purposes but also because tools like kmemleak only search for
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* pointers that are aligned.
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*/
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struct saved_context {
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struct pt_regs regs;
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/*
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* User CS and SS are saved in current_pt_regs(). The rest of the
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* segment selectors need to be saved and restored here.
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*/
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u16 ds, es, fs, gs;
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/*
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* Usermode FSBASE and GSBASE may not match the fs and gs selectors,
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* so we save them separately. We save the kernelmode GSBASE to
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* restore percpu access after resume.
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*/
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unsigned long kernelmode_gs_base, usermode_gs_base, fs_base;
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unsigned long cr0, cr2, cr3, cr4;
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u64 misc_enable;
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struct saved_msrs saved_msrs;
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unsigned long efer;
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u16 gdt_pad; /* Unused */
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struct desc_ptr gdt_desc;
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u16 idt_pad;
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struct desc_ptr idt;
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u16 ldt;
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u16 tss;
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unsigned long tr;
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unsigned long safety;
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unsigned long return_address;
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bool misc_enable_saved;
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} __attribute__((packed));
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#define loaddebug(thread,register) \
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set_debugreg((thread)->debugreg##register, register)
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/* routines for saving/restoring kernel state */
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extern char core_restore_code[];
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extern char restore_registers[];
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#endif /* _ASM_X86_SUSPEND_64_H */
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