arch/powerpc/include/asm/book3s/64/hash-pkey.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/book3s/64/hash-pkey.h

Extension

.h

Size

1545 bytes

Lines

46

Domain

Architecture Layer

Bucket

arch/powerpc

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

• No C-style include directives detected by the generator.

Detected Declarations

• function hash__vmflag_to_pte_pkey_bits
• function pte_to_hpte_pkey_bits
• function hash__pte_to_pkey_bits

Annotated Snippet

mmu_has_feature(MMU_FTR_BOOK3S_KUEP)) {
		if ((pte_pkey == 0) && (flags & HPTE_USE_KERNEL_KEY))
			return HASH_DEFAULT_KERNEL_KEY;
	}

	return pte_pkey;
}

static inline u16 hash__pte_to_pkey_bits(u64 pteflags)
{
	return (((pteflags & H_PTE_PKEY_BIT4) ? 0x10 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT3) ? 0x8 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT2) ? 0x4 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT1) ? 0x2 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT0) ? 0x1 : 0x0UL));
}

#endif

Annotation

• Detected declarations: `function hash__vmflag_to_pte_pkey_bits`, `function pte_to_hpte_pkey_bits`, `function hash__pte_to_pkey_bits`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.