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 #include <asm/msr.h> 13 14 /* 15 * Image of the saved processor state, used by the low level ACPI suspend to 16 * RAM code and by the low level hibernation code. 17 * 18 * If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S 19 * and make sure that __save/__restore_processor_state(), defined in 20 * arch/x86/power/cpu.c, still work as required. 21 * 22 * Because the structure is packed, make sure to avoid unaligned members. For 23 * optimisation purposes but also because tools like kmemleak only search for 24 * pointers that are aligned. 25 */ 26 struct saved_context { 27 struct pt_regs regs; 28 29 /* 30 * User CS and SS are saved in current_pt_regs(). The rest of the 31 * segment selectors need to be saved and restored here. 32 */ 33 u16 ds, es, fs, gs; 34 35 /* 36 * Usermode FSBASE and GSBASE may not match the fs and gs selectors, 37 * so we save them separately. We save the kernelmode GSBASE to 38 * restore percpu access after resume. 39 */ 40 unsigned long kernelmode_gs_base, usermode_gs_base, fs_base; 41 42 unsigned long cr0, cr2, cr3, cr4; 43 u64 misc_enable; 44 struct saved_msrs saved_msrs; 45 unsigned long efer; 46 u16 gdt_pad; /* Unused */ 47 struct desc_ptr gdt_desc; 48 u16 idt_pad; 49 struct desc_ptr idt; 50 u16 ldt; 51 u16 tss; 52 unsigned long tr; 53 unsigned long safety; 54 unsigned long return_address; 55 bool misc_enable_saved; 56 } __attribute__((packed)); 57 58 #define loaddebug(thread,register) \ 59 set_debugreg((thread)->debugreg##register, register) 60 61 /* routines for saving/restoring kernel state */ 62 extern char core_restore_code[]; 63 extern char restore_registers[]; 64 65 #endif /* _ASM_X86_SUSPEND_64_H */ 66