Commit | Line | Data |
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71e3aac0 AA |
1 | #ifndef _LINUX_HUGE_MM_H |
2 | #define _LINUX_HUGE_MM_H | |
3 | ||
4 | extern int do_huge_pmd_anonymous_page(struct mm_struct *mm, | |
5 | struct vm_area_struct *vma, | |
6 | unsigned long address, pmd_t *pmd, | |
7 | unsigned int flags); | |
8 | extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, | |
9 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
10 | struct vm_area_struct *vma); | |
a1dd450b WD |
11 | extern void huge_pmd_set_accessed(struct mm_struct *mm, |
12 | struct vm_area_struct *vma, | |
13 | unsigned long address, pmd_t *pmd, | |
14 | pmd_t orig_pmd, int dirty); | |
71e3aac0 AA |
15 | extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, |
16 | unsigned long address, pmd_t *pmd, | |
17 | pmd_t orig_pmd); | |
b676b293 | 18 | extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
71e3aac0 AA |
19 | unsigned long addr, |
20 | pmd_t *pmd, | |
21 | unsigned int flags); | |
b8d3c4c3 MK |
22 | extern int madvise_free_huge_pmd(struct mmu_gather *tlb, |
23 | struct vm_area_struct *vma, | |
24 | pmd_t *pmd, unsigned long addr, unsigned long next); | |
71e3aac0 AA |
25 | extern int zap_huge_pmd(struct mmu_gather *tlb, |
26 | struct vm_area_struct *vma, | |
f21760b1 | 27 | pmd_t *pmd, unsigned long addr); |
0ca1634d JW |
28 | extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
29 | unsigned long addr, unsigned long end, | |
30 | unsigned char *vec); | |
4b471e88 | 31 | extern bool move_huge_pmd(struct vm_area_struct *vma, |
37a1c49a AA |
32 | struct vm_area_struct *new_vma, |
33 | unsigned long old_addr, | |
34 | unsigned long new_addr, unsigned long old_end, | |
35 | pmd_t *old_pmd, pmd_t *new_pmd); | |
cd7548ab | 36 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
37 | unsigned long addr, pgprot_t newprot, |
38 | int prot_numa); | |
5cad465d | 39 | int vmf_insert_pfn_pmd(struct vm_area_struct *, unsigned long addr, pmd_t *, |
f25748e3 | 40 | pfn_t pfn, bool write); |
71e3aac0 AA |
41 | enum transparent_hugepage_flag { |
42 | TRANSPARENT_HUGEPAGE_FLAG, | |
43 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
44 | TRANSPARENT_HUGEPAGE_DEFRAG_FLAG, | |
45 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, | |
ba76149f | 46 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 47 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
48 | #ifdef CONFIG_DEBUG_VM |
49 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
50 | #endif | |
51 | }; | |
52 | ||
d8c37c48 NH |
53 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
54 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
55 | ||
71e3aac0 | 56 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
3565fce3 DW |
57 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
58 | pmd_t *pmd, int flags); | |
59 | ||
fde52796 AK |
60 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
61 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
62 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 63 | |
20995974 AS |
64 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
65 | ||
71e3aac0 | 66 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
67 | ((transparent_hugepage_flags & \ |
68 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
69 | (transparent_hugepage_flags & \ | |
70 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
71 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec AA |
72 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
73 | !is_vma_temporary_stack(__vma)) | |
71e3aac0 AA |
74 | #define transparent_hugepage_defrag(__vma) \ |
75 | ((transparent_hugepage_flags & \ | |
76 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) || \ | |
77 | (transparent_hugepage_flags & \ | |
78 | (1<<TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG) && \ | |
79 | (__vma)->vm_flags & VM_HUGEPAGE)) | |
79da5407 KS |
80 | #define transparent_hugepage_use_zero_page() \ |
81 | (transparent_hugepage_flags & \ | |
82 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
83 | #ifdef CONFIG_DEBUG_VM |
84 | #define transparent_hugepage_debug_cow() \ | |
85 | (transparent_hugepage_flags & \ | |
86 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
87 | #else /* CONFIG_DEBUG_VM */ | |
88 | #define transparent_hugepage_debug_cow() 0 | |
89 | #endif /* CONFIG_DEBUG_VM */ | |
90 | ||
91 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 | 92 | |
9a982250 KS |
93 | extern void prep_transhuge_page(struct page *page); |
94 | extern void free_transhuge_page(struct page *page); | |
95 | ||
e9b61f19 KS |
96 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
97 | static inline int split_huge_page(struct page *page) | |
98 | { | |
99 | return split_huge_page_to_list(page, NULL); | |
100 | } | |
9a982250 | 101 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
102 | |
103 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
104 | unsigned long address); | |
105 | ||
106 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
107 | do { \ | |
108 | pmd_t *____pmd = (__pmd); \ | |
5c7fb56e DW |
109 | if (pmd_trans_huge(*____pmd) \ |
110 | || pmd_devmap(*____pmd)) \ | |
eef1b3ba KS |
111 | __split_huge_pmd(__vma, __pmd, __address); \ |
112 | } while (0) | |
ad0bed24 | 113 | |
dfa5e237 | 114 | #if HPAGE_PMD_ORDER >= MAX_ORDER |
71e3aac0 AA |
115 | #error "hugepages can't be allocated by the buddy allocator" |
116 | #endif | |
60ab3244 AA |
117 | extern int hugepage_madvise(struct vm_area_struct *vma, |
118 | unsigned long *vm_flags, int advice); | |
e1b9996b | 119 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
120 | unsigned long start, |
121 | unsigned long end, | |
122 | long adjust_next); | |
b6ec57f4 KS |
123 | extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, |
124 | struct vm_area_struct *vma); | |
025c5b24 | 125 | /* mmap_sem must be held on entry */ |
b6ec57f4 KS |
126 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
127 | struct vm_area_struct *vma) | |
025c5b24 | 128 | { |
81d1b09c | 129 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
5c7fb56e | 130 | if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 131 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 132 | else |
4b471e88 | 133 | return false; |
025c5b24 | 134 | } |
2c888cfb RR |
135 | static inline int hpage_nr_pages(struct page *page) |
136 | { | |
137 | if (unlikely(PageTransHuge(page))) | |
138 | return HPAGE_PMD_NR; | |
139 | return 1; | |
140 | } | |
d10e63f2 | 141 | |
4daae3b4 MG |
142 | extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
143 | unsigned long addr, pmd_t pmd, pmd_t *pmdp); | |
d10e63f2 | 144 | |
56873f43 WY |
145 | extern struct page *huge_zero_page; |
146 | ||
147 | static inline bool is_huge_zero_page(struct page *page) | |
148 | { | |
149 | return ACCESS_ONCE(huge_zero_page) == page; | |
150 | } | |
151 | ||
fc437044 MW |
152 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
153 | { | |
154 | return is_huge_zero_page(pmd_page(pmd)); | |
155 | } | |
156 | ||
157 | struct page *get_huge_zero_page(void); | |
fc437044 | 158 | |
71e3aac0 | 159 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
160 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
161 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
162 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 163 | |
2c888cfb RR |
164 | #define hpage_nr_pages(x) 1 |
165 | ||
71e3aac0 AA |
166 | #define transparent_hugepage_enabled(__vma) 0 |
167 | ||
168 | #define transparent_hugepage_flags 0UL | |
5bc7b8ac SL |
169 | static inline int |
170 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
171 | { | |
172 | return 0; | |
173 | } | |
71e3aac0 AA |
174 | static inline int split_huge_page(struct page *page) |
175 | { | |
176 | return 0; | |
177 | } | |
9a982250 | 178 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 179 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 180 | do { } while (0) |
60ab3244 AA |
181 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
182 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
183 | { |
184 | BUG(); | |
185 | return 0; | |
186 | } | |
94fcc585 AA |
187 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
188 | unsigned long start, | |
189 | unsigned long end, | |
190 | long adjust_next) | |
191 | { | |
192 | } | |
b6ec57f4 KS |
193 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
194 | struct vm_area_struct *vma) | |
025c5b24 | 195 | { |
b6ec57f4 | 196 | return NULL; |
025c5b24 | 197 | } |
d10e63f2 | 198 | |
4daae3b4 MG |
199 | static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
200 | unsigned long addr, pmd_t pmd, pmd_t *pmdp) | |
d10e63f2 | 201 | { |
4daae3b4 | 202 | return 0; |
d10e63f2 MG |
203 | } |
204 | ||
56873f43 WY |
205 | static inline bool is_huge_zero_page(struct page *page) |
206 | { | |
207 | return false; | |
208 | } | |
209 | ||
3565fce3 DW |
210 | |
211 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
212 | unsigned long addr, pmd_t *pmd, int flags) | |
213 | { | |
214 | return NULL; | |
215 | } | |
71e3aac0 AA |
216 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
217 | ||
218 | #endif /* _LINUX_HUGE_MM_H */ |