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 huge_ptep_clear_flush(struct vm_area_struct *vma,
  32                                          unsigned long addr, pte_t *ptep)
  33 {
  34         ptep_clear_flush(vma, addr, ptep);
  35 }
  36
  37 static inline int huge_pte_none(pte_t pte)
  38 {
  39         return pte_none(pte);
  40 }
  41
  42 static inline pte_t huge_pte_wrprotect(pte_t pte)
  43 {
  44         return pte_wrprotect(pte);
  45 }
  46
  47 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  48                                            unsigned long addr, pte_t *ptep)
  49 {
  50         ptep_set_wrprotect(mm, addr, ptep);
  51 }
  52
  53 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  54                                              unsigned long addr, pte_t *ptep,
  55                                              pte_t pte, int dirty)
  56 {
  57         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  58 }
  59
  60 static inline pte_t huge_ptep_get(pte_t *ptep)
  61 {
  62         return *ptep;
  63 }
  64
  65 static inline void arch_clear_hugepage_flags(struct page *page)
  66 {
  67 }
  68
  69 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  70 static inline bool gigantic_page_supported(void) { return true; }
  71 #endif
  72
  73 #endif /* _ASM_X86_HUGETLB_H */