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