arch/arm64/include/asm/hugetlb.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm64/include/asm/hugetlb.h
   4  *
   5  * Copyright (C) 2013 Linaro Ltd.
   6  *
   7  * Based on arch/x86/include/asm/hugetlb.h
   8  */
   9
  10 #ifndef __ASM_HUGETLB_H
  11 #define __ASM_HUGETLB_H
  12
  13 #include <asm/page.h>
  14
  15 #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
  16 #define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
  17 extern bool arch_hugetlb_migration_supported(struct hstate *h);
  18 #endif
  19
  20 #define __HAVE_ARCH_HUGE_PTEP_GET
  21 static inline pte_t huge_ptep_get(pte_t *ptep)
  22 {
  23         return READ_ONCE(*ptep);
  24 }
  25
  26 static inline int is_hugepage_only_range(struct mm_struct *mm,
  27                                          unsigned long addr, unsigned long len)
  28 {
  29         return 0;
  30 }
  31
  32 static inline void arch_clear_hugepage_flags(struct page *page)
  33 {
  34         clear_bit(PG_dcache_clean, &page->flags);
  35 }
  36
  37 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
  38                                 struct page *page, int writable);
  39 #define arch_make_huge_pte arch_make_huge_pte
  40 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
  41 extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  42                             pte_t *ptep, pte_t pte);
  43 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
  44 extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  45                                       unsigned long addr, pte_t *ptep,
  46                                       pte_t pte, int dirty);
  47 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
  48 extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  49                                      unsigned long addr, pte_t *ptep);
  50 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
  51 extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
  52                                     unsigned long addr, pte_t *ptep);
  53 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
  54 extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
  55                                   unsigned long addr, pte_t *ptep);
  56 #define __HAVE_ARCH_HUGE_PTE_CLEAR
  57 extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
  58                            pte_t *ptep, unsigned long sz);
  59 extern void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
  60                                  pte_t *ptep, pte_t pte, unsigned long sz);
  61 #define set_huge_swap_pte_at set_huge_swap_pte_at
  62
  63 #include <asm-generic/hugetlb.h>
  64
  65 #endif /* __ASM_HUGETLB_H */