arch/sparc/include/asm/hugetlb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_SPARC64_HUGETLB_H
   3 #define _ASM_SPARC64_HUGETLB_H
   4
   5 #include <asm/page.h>
   6 #include <asm-generic/hugetlb.h>
   7
   8 #ifdef CONFIG_HUGETLB_PAGE
   9 struct pud_huge_patch_entry {
  10         unsigned int addr;
  11         unsigned int insn;
  12 };
  13 extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
  14 #endif
  15
  16 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  17                      pte_t *ptep, pte_t pte);
  18
  19 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
  20                               pte_t *ptep);
  21
  22 static inline int is_hugepage_only_range(struct mm_struct *mm,
  23                                          unsigned long addr,
  24                                          unsigned long len) {
  25         return 0;
  26 }
  27
  28 /*
  29  * If the arch doesn't supply something else, assume that hugepage
  30  * size aligned regions are ok without further preparation.
  31  */
  32 static inline int prepare_hugepage_range(struct file *file,
  33                         unsigned long addr, unsigned long len)
  34 {
  35         struct hstate *h = hstate_file(file);
  36
  37         if (len & ~huge_page_mask(h))
  38                 return -EINVAL;
  39         if (addr & ~huge_page_mask(h))
  40                 return -EINVAL;
  41         return 0;
  42 }
  43
  44 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  45                                          unsigned long addr, pte_t *ptep)
  46 {
  47 }
  48
  49 static inline int huge_pte_none(pte_t pte)
  50 {
  51         return pte_none(pte);
  52 }
  53
  54 static inline pte_t huge_pte_wrprotect(pte_t pte)
  55 {
  56         return pte_wrprotect(pte);
  57 }
  58
  59 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  60                                            unsigned long addr, pte_t *ptep)
  61 {
  62         pte_t old_pte = *ptep;
  63         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
  64 }
  65
  66 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  67                                              unsigned long addr, pte_t *ptep,
  68                                              pte_t pte, int dirty)
  69 {
  70         int changed = !pte_same(*ptep, pte);
  71         if (changed) {
  72                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  73                 flush_tlb_page(vma, addr);
  74         }
  75         return changed;
  76 }
  77
  78 static inline pte_t huge_ptep_get(pte_t *ptep)
  79 {
  80         return *ptep;
  81 }
  82
  83 static inline void arch_clear_hugepage_flags(struct page *page)
  84 {
  85 }
  86
  87 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  88                             unsigned long end, unsigned long floor,
  89                             unsigned long ceiling);
  90
  91 #endif /* _ASM_SPARC64_HUGETLB_H */