arch/x86/include/asm/suspend_64.h

Source file repositories/reference/linux-study-clean/arch/x86/include/asm/suspend_64.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/suspend_64.h
Extension
.h
Size
1854 bytes
Lines
66
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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 */

Annotation

Implementation Notes