arch/s390/include/asm/hugetlb.h
Source file repositories/reference/linux-study-clean/arch/s390/include/asm/hugetlb.h
File Facts
- System
- Linux kernel
- Corpus path
arch/s390/include/asm/hugetlb.h- Extension
.h- Size
- 2745 bytes
- Lines
- 101
- Domain
- Architecture Layer
- Bucket
- arch/s390
- 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/cpufeature.hlinux/pgtable.hlinux/swap.hlinux/swapops.hasm/page.hasm-generic/hugetlb.h
Detected Declarations
function huge_ptep_get_and_clearfunction huge_pte_clearfunction huge_ptep_clear_flushfunction huge_ptep_set_access_flagsfunction huge_ptep_set_wrprotectfunction huge_pte_mkuffd_wpfunction huge_pte_clear_uffd_wpfunction huge_pte_uffd_wp
Annotated Snippet
#ifndef _ASM_S390_HUGETLB_H
#define _ASM_S390_HUGETLB_H
#include <linux/cpufeature.h>
#include <linux/pgtable.h>
#include <linux/swap.h>
#include <linux/swapops.h>
#include <asm/page.h>
#define hugepages_supported() cpu_has_edat1()
#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned long sz);
void __set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte);
#define __HAVE_ARCH_HUGE_PTEP_GET
pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
pte_t __huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep);
#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
unsigned long sz)
{
return __huge_ptep_get_and_clear(mm, addr, ptep);
}
#define __HAVE_ARCH_HUGE_PTE_CLEAR
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned long sz)
{
if ((pte_val(ptep_get(ptep)) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
set_pte(ptep, __pte(_REGION3_ENTRY_EMPTY));
else
set_pte(ptep, __pte(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep)
{
return __huge_ptep_get_and_clear(vma->vm_mm, address, ptep);
}
#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty)
{
int changed = !pte_same(huge_ptep_get(vma->vm_mm, addr, ptep), pte);
if (changed) {
__huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
__set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
}
return changed;
}
#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
pte_t pte = __huge_ptep_get_and_clear(mm, addr, ptep);
__set_huge_pte_at(mm, addr, ptep, pte_wrprotect(pte));
}
#define __HAVE_ARCH_HUGE_PTE_MKUFFD_WP
static inline pte_t huge_pte_mkuffd_wp(pte_t pte)
{
return pte;
}
#define __HAVE_ARCH_HUGE_PTE_CLEAR_UFFD_WP
static inline pte_t huge_pte_clear_uffd_wp(pte_t pte)
{
return pte;
}
#define __HAVE_ARCH_HUGE_PTE_UFFD_WP
static inline int huge_pte_uffd_wp(pte_t pte)
{
return 0;
}
#include <asm-generic/hugetlb.h>
Annotation
- Immediate include surface: `linux/cpufeature.h`, `linux/pgtable.h`, `linux/swap.h`, `linux/swapops.h`, `asm/page.h`, `asm-generic/hugetlb.h`.
- Detected declarations: `function huge_ptep_get_and_clear`, `function huge_pte_clear`, `function huge_ptep_clear_flush`, `function huge_ptep_set_access_flags`, `function huge_ptep_set_wrprotect`, `function huge_pte_mkuffd_wp`, `function huge_pte_clear_uffd_wp`, `function huge_pte_uffd_wp`.
- Atlas domain: Architecture Layer / arch/s390.
- 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.