LXR linux/arch/x86/include/asm/hugetlb.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_HUGETLB_H
   3#define _ASM_X86_HUGETLB_H
   4
   5#include <asm/page.h>
   6#include <asm-generic/hugetlb.h>
   7
   8#define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE)
   9
  10static inline int is_hugepage_only_range(struct mm_struct *mm,
  11                                         unsigned long addr,
  12                                         unsigned long len) {
  13        return 0;
  14}
  15
  16/*
  17 * If the arch doesn't supply something else, assume that hugepage
  18 * size aligned regions are ok without further preparation.
  19 */
  20static inline int prepare_hugepage_range(struct file *file,
  21                        unsigned long addr, unsigned long len)
  22{
  23        struct hstate *h = hstate_file(file);
  24        if (len & ~huge_page_mask(h))
  25                return -EINVAL;
  26        if (addr & ~huge_page_mask(h))
  27                return -EINVAL;
  28        return 0;
  29}
  30
  31static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  32                                          unsigned long addr, unsigned long end,
  33                                          unsigned long floor,
  34                                          unsigned long ceiling)
  35{
  36        free_pgd_range(tlb, addr, end, floor, ceiling);
  37}
  38
  39static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  40                                   pte_t *ptep, pte_t pte)
  41{
  42        set_pte_at(mm, addr, ptep, pte);
  43}
  44
  45static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  46                                            unsigned long addr, pte_t *ptep)
  47{
  48        return ptep_get_and_clear(mm, addr, ptep);
  49}
  50
  51static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  52                                         unsigned long addr, pte_t *ptep)
  53{
  54        ptep_clear_flush(vma, addr, ptep);
  55}
  56
  57static inline int huge_pte_none(pte_t pte)
  58{
  59        return pte_none(pte);
  60}
  61
  62static inline pte_t huge_pte_wrprotect(pte_t pte)
  63{
  64        return pte_wrprotect(pte);
  65}
  66
  67static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  68                                           unsigned long addr, pte_t *ptep)
  69{
  70        ptep_set_wrprotect(mm, addr, ptep);
  71}
  72
  73static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  74                                             unsigned long addr, pte_t *ptep,
  75                                             pte_t pte, int dirty)
  76{
  77        return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  78}
  79
  80static inline pte_t huge_ptep_get(pte_t *ptep)
  81{
  82        return *ptep;
  83}
  84
  85static inline void arch_clear_hugepage_flags(struct page *page)
  86{
  87}
  88
  89#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  90static inline bool gigantic_page_supported(void) { return true; }
  91#endif
  92
  93#endif /* _ASM_X86_HUGETLB_H */
  94