LXR linux/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
   9static 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 */
  19static 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
  30static 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
  38static 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
  44static 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
  50static 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
  56static inline int huge_pte_none(pte_t pte)
  57{
  58        return pte_none(pte);
  59}
  60
  61static inline pte_t huge_pte_wrprotect(pte_t pte)
  62{
  63        return pte_wrprotect(pte);
  64}
  65
  66static 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
  72static 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
  79static inline pte_t huge_ptep_get(pte_t *ptep)
  80{
  81        return *ptep;
  82}
  83
  84static inline void arch_clear_hugepage_flags(struct page *page)
  85{
  86}
  87
  88#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  89static inline bool gigantic_page_supported(void) { return true; }
  90#endif
  91
  92#endif /* _ASM_X86_HUGETLB_H */
  93