arch/x86/include/asm/trap_pf.h

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

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/trap_pf.h
Extension
.h
Size
881 bytes
Lines
33
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

#ifndef _ASM_X86_TRAP_PF_H
#define _ASM_X86_TRAP_PF_H

#include <linux/bits.h>

/*
 * Page fault error code bits:
 *
 *   bit 0 ==	 0: no page found	1: protection fault
 *   bit 1 ==	 0: read access		1: write access
 *   bit 2 ==	 0: kernel-mode access	1: user-mode access
 *   bit 3 ==				1: use of reserved bit detected
 *   bit 4 ==				1: fault was an instruction fetch
 *   bit 5 ==				1: protection keys block access
 *   bit 6 ==				1: shadow stack access fault
 *   bit 15 ==				1: SGX MMU page-fault
 *   bit 31 ==				1: fault was due to RMP violation
 */
enum x86_pf_error_code {
	X86_PF_PROT	=		BIT(0),
	X86_PF_WRITE	=		BIT(1),
	X86_PF_USER	=		BIT(2),
	X86_PF_RSVD	=		BIT(3),
	X86_PF_INSTR	=		BIT(4),
	X86_PF_PK	=		BIT(5),
	X86_PF_SHSTK	=		BIT(6),
	X86_PF_SGX	=		BIT(15),
	X86_PF_RMP	=		BIT(31),
};

#endif /* _ASM_X86_TRAP_PF_H */

Annotation

Implementation Notes