[linux-2.6-block.git] / arch / x86 / include / asm / suspend_64.h

/* 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>
#include <asm/msr.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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* Copyright 2001-2003 Pavel Machek <pavel@suse.cz>
	4	* Based on code
	5	* Copyright 2001 Patrick Mochel <mochel@osdl.org>
	6	*/
1965aae3 PA	7	#ifndef _ASM_X86_SUSPEND_64_H
1965aae3 PA	8	#define _ASM_X86_SUSPEND_64_H
0de80bcc	9
1da177e4	10	#include <asm/desc.h>
df6b35f4	11	#include <asm/fpu/api.h>
efef7f18	12	#include <asm/msr.h>
1da177e4	13
5c9c9bec RW	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	*
b0b592cf MB	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.
5c9c9bec	25	*/
1da177e4	26	struct saved_context {
0de80bcc	27	struct pt_regs regs;
7ee18d67 AL	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
83b584d9	42	unsigned long cr0, cr2, cr3, cr4;
85a0e753	43	u64 misc_enable;
7a9c2dd0	44	struct saved_msrs saved_msrs;
3c321bce	45	unsigned long efer;
cc456c4e KRW	46	u16 gdt_pad; /* Unused */
cc456c4e KRW	47	struct desc_ptr gdt_desc;
1da177e4	48	u16 idt_pad;
090edbe2	49	struct desc_ptr idt;
1da177e4 LT	50	u16 ldt;
	51	u16 tss;
	52	unsigned long tr;
	53	unsigned long safety;
	54	unsigned long return_address;
b0b592cf	55	bool misc_enable_saved;
1da177e4 LT	56	} __attribute__((packed));
1da177e4 LT	57
1da177e4	58	#define loaddebug(thread,register) \
2b514e74	59	set_debugreg((thread)->debugreg##register, register)
1da177e4	60
1da177e4	61	/* routines for saving/restoring kernel state */
c0944883 KC	62	extern char core_restore_code[];
c0944883 KC	63	extern char restore_registers[];
0de80bcc	64
1965aae3	65	#endif /* _ASM_X86_SUSPEND_64_H */