arch/x86/include/asm/pgtable_types.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/pgtable_types.h

Extension

.h

Size

18319 bytes

Lines

582

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.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/const.h
• linux/mem_encrypt.h
• asm/page_types.h
• asm/pgtable_32_types.h
• asm/pgtable_64_types.h
• linux/types.h
• asm-generic/pgtable-nop4d.h
• asm-generic/pgtable-nopud.h
• asm-generic/pgtable-nopmd.h

Detected Declarations

• struct file
• enum page_cache_mode
• enum pg_level
• function pgprot_nx
• function native_make_pgd
• function native_pgd_val
• function pgd_flags
• function native_make_p4d
• function native_p4d_val
• function native_make_p4d
• function native_p4d_val
• function native_make_pud
• function native_pud_val
• function native_make_pud
• function native_pud_val
• function native_make_pmd
• function native_pmd_val
• function native_make_pmd
• function native_pmd_val
• function p4d_pfn_mask
• function p4d_flags_mask
• function p4d_flags
• function pud_pfn_mask
• function pud_flags_mask
• function pud_flags
• function pmd_pfn_mask
• function pmd_flags_mask
• function pmd_flags
• function native_make_pte
• function native_pte_val
• function pte_flags
• function protval_4k_2_large
• function pgprot_4k_2_large
• function protval_large_2_4k
• function pgprot_large_2_4k
• function update_page_count

Annotated Snippet

static inline void update_page_count(int level, unsigned long pages) { }
#endif

/*
 * Helper function that returns the kernel pagetable entry controlling
 * the virtual address 'address'. NULL means no pagetable entry present.
 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
 * as a pte too.
 */
extern pte_t *lookup_address(unsigned long address, unsigned int *level);
extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
				    unsigned int *level);
pte_t *lookup_address_in_pgd_attr(pgd_t *pgd, unsigned long address,
				  unsigned int *level, bool *nx, bool *rw);
extern pmd_t *lookup_pmd_address(unsigned long address);
extern phys_addr_t slow_virt_to_phys(void *__address);
extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
					  unsigned long address,
					  unsigned numpages,
					  unsigned long page_flags);
extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
					    unsigned long numpages);
#endif	/* !__ASSEMBLER__ */

#endif /* _ASM_X86_PGTABLE_DEFS_H */

Annotation

• Immediate include surface: `linux/const.h`, `linux/mem_encrypt.h`, `asm/page_types.h`, `asm/pgtable_32_types.h`, `asm/pgtable_64_types.h`, `linux/types.h`, `asm-generic/pgtable-nop4d.h`, `asm-generic/pgtable-nopud.h`.
• Detected declarations: `struct file`, `enum page_cache_mode`, `enum pg_level`, `function pgprot_nx`, `function native_make_pgd`, `function native_pgd_val`, `function pgd_flags`, `function native_make_p4d`, `function native_p4d_val`, `function native_make_p4d`.
• Atlas domain: Architecture Layer / arch/x86.
• 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.