arch/arm64/include/asm/por.h

File Facts

System

Linux kernel

Corpus path

arch/arm64/include/asm/por.h

Extension

.h

Size

612 bytes

Lines

35

Domain

Architecture Layer

Bucket

arch/arm64

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.

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

Dependency Surface

• asm/sysreg.h

Detected Declarations

• function Copyright
• function por_elx_allows_write
• function por_elx_allows_exec

Annotated Snippet

#ifndef _ASM_ARM64_POR_H
#define _ASM_ARM64_POR_H

#include <asm/sysreg.h>

#define POR_EL0_INIT	POR_ELx_PERM_PREP(0, POE_RWX)

static inline bool por_elx_allows_read(u64 por, u8 pkey)
{
	u8 perm = POR_ELx_PERM_GET(pkey, por);

	return perm & POE_R;
}

static inline bool por_elx_allows_write(u64 por, u8 pkey)
{
	u8 perm = POR_ELx_PERM_GET(pkey, por);

	return perm & POE_W;
}

static inline bool por_elx_allows_exec(u64 por, u8 pkey)
{
	u8 perm = POR_ELx_PERM_GET(pkey, por);

	return perm & POE_X;
}

#endif /* _ASM_ARM64_POR_H */

Annotation

• Immediate include surface: `asm/sysreg.h`.
• Detected declarations: `function Copyright`, `function por_elx_allows_write`, `function por_elx_allows_exec`.
• Atlas domain: Architecture Layer / arch/arm64.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.