1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright 2001-2003 Pavel Machek <pavel@suse.cz> 4 * Based on code 5 * Copyright 2001 Patrick Mochel <mochel@osdl.org> 6 */ 7 #ifndef _ASM_X86_SUSPEND_64_H 8 #define _ASM_X86_SUSPEND_64_H 9 10 #include <asm/desc.h> 11 #include <asm/fpu/api.h> 12 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 * 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. 24 */ 25 struct saved_context { 26 struct pt_regs regs; 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 41 unsigned long cr0, cr2, cr3, cr4; 42 u64 misc_enable; 43 struct saved_msrs saved_msrs; 44 unsigned long efer; 45 u16 gdt_pad; /* Unused */ 46 struct desc_ptr gdt_desc; 47 u16 idt_pad; 48 struct desc_ptr idt; 49 u16 ldt; 50 u16 tss; 51 unsigned long tr; 52 unsigned long safety; 53 unsigned long return_address; 54 bool misc_enable_saved; 55 } __attribute__((packed)); 56 57 #define loaddebug(thread,register) \ 58 set_debugreg((thread)->debugreg##register, register) 59 60 /* routines for saving/restoring kernel state */ 61 extern char core_restore_code[]; 62 extern char restore_registers[]; 63 64 #endif /* _ASM_X86_SUSPEND_64_H */ 65