hugetlb: introduce generic version of huge_ptep_set_wrprotect()
[muen/linux.git] / 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
7 #ifdef CONFIG_HUGETLB_PAGE
8 struct pud_huge_patch_entry {
9         unsigned int addr;
10         unsigned int insn;
11 };
12 extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
13 #endif
14
15 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
16 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
17                      pte_t *ptep, pte_t pte);
18
19 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
20 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
21                               pte_t *ptep);
22
23 static inline int is_hugepage_only_range(struct mm_struct *mm,
24                                          unsigned long addr,
25                                          unsigned long len) {
26         return 0;
27 }
28
29 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
30 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
31                                          unsigned long addr, pte_t *ptep)
32 {
33 }
34
35 #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
36 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
37                                            unsigned long addr, pte_t *ptep)
38 {
39         pte_t old_pte = *ptep;
40         set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
41 }
42
43 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
44                                              unsigned long addr, pte_t *ptep,
45                                              pte_t pte, int dirty)
46 {
47         int changed = !pte_same(*ptep, pte);
48         if (changed) {
49                 set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
50                 flush_tlb_page(vma, addr);
51         }
52         return changed;
53 }
54
55 static inline pte_t huge_ptep_get(pte_t *ptep)
56 {
57         return *ptep;
58 }
59
60 static inline void arch_clear_hugepage_flags(struct page *page)
61 {
62 }
63
64 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
65 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
66                             unsigned long end, unsigned long floor,
67                             unsigned long ceiling);
68
69 #include <asm-generic/hugetlb.h>
70
71 #endif /* _ASM_SPARC64_HUGETLB_H */