arch/x86/include/asm/hugetlb.h

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