hugetlb: introduce generic version of set_huge_pte_at()
[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 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 #define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
88 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
89                             unsigned long end, unsigned long floor,
90                             unsigned long ceiling);
91
92 #include <asm-generic/hugetlb.h>
93
94 #endif /* _ASM_SPARC64_HUGETLB_H */