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
  10 static 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  */
  20 static 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
  31 static 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
  39 static 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
  45 static 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
  51 static 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
  57 static inline int huge_pte_none(pte_t pte)
  58 {
  59         return pte_none(pte);
  60 }
  61
  62 static inline pte_t huge_pte_wrprotect(pte_t pte)
  63 {
  64         return pte_wrprotect(pte);
  65 }
  66
  67 static 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
  73 static 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
  80 static inline pte_t huge_ptep_get(pte_t *ptep)
  81 {
  82         return *ptep;
  83 }
  84
  85 static inline void arch_clear_hugepage_flags(struct page *page)
  86 {
  87 }
  88
  89 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  90 static inline bool gigantic_page_supported(void) { return true; }
  91 #endif
  92
  93 #endif /* _ASM_X86_HUGETLB_H */