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); | |
bf8616d5 | 31 | extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, |
37a1c49a AA |
32 | unsigned long new_addr, unsigned long old_end, |
33 | pmd_t *old_pmd, pmd_t *new_pmd); | |
cd7548ab | 34 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
35 | unsigned long addr, pgprot_t newprot, |
36 | int prot_numa); | |
5cad465d | 37 | int vmf_insert_pfn_pmd(struct vm_area_struct *, unsigned long addr, pmd_t *, |
f25748e3 | 38 | pfn_t pfn, bool write); |
71e3aac0 AA |
39 | enum transparent_hugepage_flag { |
40 | TRANSPARENT_HUGEPAGE_FLAG, | |
41 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
444eb2a4 MG |
42 | TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, |
43 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, | |
71e3aac0 | 44 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, |
ba76149f | 45 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 46 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
47 | #ifdef CONFIG_DEBUG_VM |
48 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
49 | #endif | |
50 | }; | |
51 | ||
d8c37c48 NH |
52 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
53 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
54 | ||
71e3aac0 | 55 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
3565fce3 DW |
56 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
57 | pmd_t *pmd, int flags); | |
58 | ||
fde52796 AK |
59 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
60 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
61 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 62 | |
20995974 AS |
63 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
64 | ||
71e3aac0 | 65 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
66 | ((transparent_hugepage_flags & \ |
67 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
68 | (transparent_hugepage_flags & \ | |
69 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
70 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec AA |
71 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
72 | !is_vma_temporary_stack(__vma)) | |
79da5407 KS |
73 | #define transparent_hugepage_use_zero_page() \ |
74 | (transparent_hugepage_flags & \ | |
75 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
76 | #ifdef CONFIG_DEBUG_VM |
77 | #define transparent_hugepage_debug_cow() \ | |
78 | (transparent_hugepage_flags & \ | |
79 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
80 | #else /* CONFIG_DEBUG_VM */ | |
81 | #define transparent_hugepage_debug_cow() 0 | |
82 | #endif /* CONFIG_DEBUG_VM */ | |
83 | ||
84 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 | 85 | |
9a982250 KS |
86 | extern void prep_transhuge_page(struct page *page); |
87 | extern void free_transhuge_page(struct page *page); | |
88 | ||
e9b61f19 KS |
89 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
90 | static inline int split_huge_page(struct page *page) | |
91 | { | |
92 | return split_huge_page_to_list(page, NULL); | |
93 | } | |
9a982250 | 94 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
95 | |
96 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
fec89c10 | 97 | unsigned long address, bool freeze); |
eef1b3ba KS |
98 | |
99 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
100 | do { \ | |
101 | pmd_t *____pmd = (__pmd); \ | |
5c7fb56e DW |
102 | if (pmd_trans_huge(*____pmd) \ |
103 | || pmd_devmap(*____pmd)) \ | |
fec89c10 KS |
104 | __split_huge_pmd(__vma, __pmd, __address, \ |
105 | false); \ | |
eef1b3ba | 106 | } while (0) |
ad0bed24 | 107 | |
2a52bcbc | 108 | |
fec89c10 KS |
109 | void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, |
110 | bool freeze, struct page *page); | |
2a52bcbc | 111 | |
60ab3244 AA |
112 | extern int hugepage_madvise(struct vm_area_struct *vma, |
113 | unsigned long *vm_flags, int advice); | |
e1b9996b | 114 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
115 | unsigned long start, |
116 | unsigned long end, | |
117 | long adjust_next); | |
b6ec57f4 KS |
118 | extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, |
119 | struct vm_area_struct *vma); | |
025c5b24 | 120 | /* mmap_sem must be held on entry */ |
b6ec57f4 KS |
121 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
122 | struct vm_area_struct *vma) | |
025c5b24 | 123 | { |
81d1b09c | 124 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
5c7fb56e | 125 | if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 126 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 127 | else |
969e8d7e | 128 | return NULL; |
025c5b24 | 129 | } |
2c888cfb RR |
130 | static inline int hpage_nr_pages(struct page *page) |
131 | { | |
132 | if (unlikely(PageTransHuge(page))) | |
133 | return HPAGE_PMD_NR; | |
134 | return 1; | |
135 | } | |
d10e63f2 | 136 | |
4daae3b4 MG |
137 | extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, |
138 | unsigned long addr, pmd_t pmd, pmd_t *pmdp); | |
d10e63f2 | 139 | |
56873f43 WY |
140 | extern struct page *huge_zero_page; |
141 | ||
142 | static inline bool is_huge_zero_page(struct page *page) | |
143 | { | |
144 | return ACCESS_ONCE(huge_zero_page) == page; | |
145 | } | |
146 | ||
fc437044 MW |
147 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
148 | { | |
149 | return is_huge_zero_page(pmd_page(pmd)); | |
150 | } | |
151 | ||
152 | struct page *get_huge_zero_page(void); | |
aa88b68c | 153 | void put_huge_zero_page(void); |
fc437044 | 154 | |
71e3aac0 | 155 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
156 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
157 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
158 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 159 | |
2c888cfb RR |
160 | #define hpage_nr_pages(x) 1 |
161 | ||
71e3aac0 AA |
162 | #define transparent_hugepage_enabled(__vma) 0 |
163 | ||
164 | #define transparent_hugepage_flags 0UL | |
5bc7b8ac SL |
165 | static inline int |
166 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
167 | { | |
168 | return 0; | |
169 | } | |
71e3aac0 AA |
170 | static inline int split_huge_page(struct page *page) |
171 | { | |
172 | return 0; | |
173 | } | |
9a982250 | 174 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 175 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 176 | do { } while (0) |
2a52bcbc KS |
177 | |
178 | static inline void split_huge_pmd_address(struct vm_area_struct *vma, | |
fec89c10 | 179 | unsigned long address, bool freeze, struct page *page) {} |
2a52bcbc | 180 | |
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 | ||
aa88b68c KS |
210 | static inline void put_huge_zero_page(void) |
211 | { | |
212 | BUILD_BUG(); | |
213 | } | |
3565fce3 DW |
214 | |
215 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
216 | unsigned long addr, pmd_t *pmd, int flags) | |
217 | { | |
218 | return NULL; | |
219 | } | |
71e3aac0 AA |
220 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
221 | ||
222 | #endif /* _LINUX_HUGE_MM_H */ |