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/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright 2001-2003 Pavel Machek <pavel@suse.cz> * Based on code * Copyright 2001 Patrick Mochel <mochel@osdl.org> */ #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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