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Commit | Line | Data |
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71e3aac0 AA |
1 | #ifndef _LINUX_HUGE_MM_H |
2 | #define _LINUX_HUGE_MM_H | |
3 | ||
82b0f8c3 | 4 | extern int do_huge_pmd_anonymous_page(struct vm_fault *vmf); |
71e3aac0 AA |
5 | extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
6 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
7 | struct vm_area_struct *vma); | |
82b0f8c3 | 8 | extern void huge_pmd_set_accessed(struct vm_fault *vmf, pmd_t orig_pmd); |
a00cc7d9 MW |
9 | extern int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
10 | pud_t *dst_pud, pud_t *src_pud, unsigned long addr, | |
11 | struct vm_area_struct *vma); | |
12 | ||
13 | #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD | |
14 | extern void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud); | |
15 | #else | |
16 | static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) | |
17 | { | |
18 | } | |
19 | #endif | |
20 | ||
82b0f8c3 | 21 | extern int do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd); |
b676b293 | 22 | extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
71e3aac0 AA |
23 | unsigned long addr, |
24 | pmd_t *pmd, | |
25 | unsigned int flags); | |
319904ad | 26 | extern bool madvise_free_huge_pmd(struct mmu_gather *tlb, |
b8d3c4c3 MK |
27 | struct vm_area_struct *vma, |
28 | pmd_t *pmd, unsigned long addr, unsigned long next); | |
71e3aac0 AA |
29 | extern int zap_huge_pmd(struct mmu_gather *tlb, |
30 | struct vm_area_struct *vma, | |
f21760b1 | 31 | pmd_t *pmd, unsigned long addr); |
a00cc7d9 MW |
32 | extern int zap_huge_pud(struct mmu_gather *tlb, |
33 | struct vm_area_struct *vma, | |
34 | pud_t *pud, unsigned long addr); | |
0ca1634d JW |
35 | extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
36 | unsigned long addr, unsigned long end, | |
37 | unsigned char *vec); | |
bf8616d5 | 38 | extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, |
37a1c49a | 39 | unsigned long new_addr, unsigned long old_end, |
5d190420 | 40 | pmd_t *old_pmd, pmd_t *new_pmd, bool *need_flush); |
cd7548ab | 41 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
42 | unsigned long addr, pgprot_t newprot, |
43 | int prot_numa); | |
a00cc7d9 MW |
44 | int vmf_insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, |
45 | pmd_t *pmd, pfn_t pfn, bool write); | |
46 | int vmf_insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr, | |
47 | pud_t *pud, pfn_t pfn, bool write); | |
71e3aac0 AA |
48 | enum transparent_hugepage_flag { |
49 | TRANSPARENT_HUGEPAGE_FLAG, | |
50 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
444eb2a4 MG |
51 | TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, |
52 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, | |
21440d7e | 53 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, |
71e3aac0 | 54 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, |
ba76149f | 55 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 56 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
57 | #ifdef CONFIG_DEBUG_VM |
58 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
59 | #endif | |
60 | }; | |
61 | ||
b46e756f KS |
62 | struct kobject; |
63 | struct kobj_attribute; | |
64 | ||
65 | extern ssize_t single_hugepage_flag_store(struct kobject *kobj, | |
66 | struct kobj_attribute *attr, | |
67 | const char *buf, size_t count, | |
68 | enum transparent_hugepage_flag flag); | |
69 | extern ssize_t single_hugepage_flag_show(struct kobject *kobj, | |
70 | struct kobj_attribute *attr, char *buf, | |
71 | enum transparent_hugepage_flag flag); | |
5a6e75f8 KS |
72 | extern struct kobj_attribute shmem_enabled_attr; |
73 | ||
d8c37c48 NH |
74 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
75 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
76 | ||
71e3aac0 | 77 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
fde52796 AK |
78 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
79 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
80 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 81 | |
a00cc7d9 MW |
82 | #define HPAGE_PUD_SHIFT PUD_SHIFT |
83 | #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) | |
84 | #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) | |
85 | ||
20995974 AS |
86 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
87 | ||
71e3aac0 | 88 | #define transparent_hugepage_enabled(__vma) \ |
a664b2d8 AA |
89 | ((transparent_hugepage_flags & \ |
90 | (1<<TRANSPARENT_HUGEPAGE_FLAG) || \ | |
91 | (transparent_hugepage_flags & \ | |
92 | (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ | |
93 | ((__vma)->vm_flags & VM_HUGEPAGE))) && \ | |
a7d6e4ec | 94 | !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ |
18600332 | 95 | !test_bit(MMF_DISABLE_THP, &(__vma)->vm_mm->flags) && \ |
a7d6e4ec | 96 | !is_vma_temporary_stack(__vma)) |
79da5407 KS |
97 | #define transparent_hugepage_use_zero_page() \ |
98 | (transparent_hugepage_flags & \ | |
99 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
100 | #ifdef CONFIG_DEBUG_VM |
101 | #define transparent_hugepage_debug_cow() \ | |
102 | (transparent_hugepage_flags & \ | |
103 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
104 | #else /* CONFIG_DEBUG_VM */ | |
105 | #define transparent_hugepage_debug_cow() 0 | |
106 | #endif /* CONFIG_DEBUG_VM */ | |
107 | ||
108 | extern unsigned long transparent_hugepage_flags; | |
ad0bed24 | 109 | |
74d2fad1 TK |
110 | extern unsigned long thp_get_unmapped_area(struct file *filp, |
111 | unsigned long addr, unsigned long len, unsigned long pgoff, | |
112 | unsigned long flags); | |
113 | ||
9a982250 KS |
114 | extern void prep_transhuge_page(struct page *page); |
115 | extern void free_transhuge_page(struct page *page); | |
116 | ||
b8f593cd | 117 | bool can_split_huge_page(struct page *page, int *pextra_pins); |
e9b61f19 KS |
118 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
119 | static inline int split_huge_page(struct page *page) | |
120 | { | |
121 | return split_huge_page_to_list(page, NULL); | |
122 | } | |
9a982250 | 123 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
124 | |
125 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
33f4751e | 126 | unsigned long address, bool freeze, struct page *page); |
eef1b3ba KS |
127 | |
128 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
129 | do { \ | |
130 | pmd_t *____pmd = (__pmd); \ | |
5c7fb56e DW |
131 | if (pmd_trans_huge(*____pmd) \ |
132 | || pmd_devmap(*____pmd)) \ | |
fec89c10 | 133 | __split_huge_pmd(__vma, __pmd, __address, \ |
33f4751e | 134 | false, NULL); \ |
eef1b3ba | 135 | } while (0) |
ad0bed24 | 136 | |
2a52bcbc | 137 | |
fec89c10 KS |
138 | void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, |
139 | bool freeze, struct page *page); | |
2a52bcbc | 140 | |
a00cc7d9 MW |
141 | void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud, |
142 | unsigned long address); | |
143 | ||
144 | #define split_huge_pud(__vma, __pud, __address) \ | |
145 | do { \ | |
146 | pud_t *____pud = (__pud); \ | |
147 | if (pud_trans_huge(*____pud) \ | |
148 | || pud_devmap(*____pud)) \ | |
149 | __split_huge_pud(__vma, __pud, __address); \ | |
150 | } while (0) | |
151 | ||
60ab3244 AA |
152 | extern int hugepage_madvise(struct vm_area_struct *vma, |
153 | unsigned long *vm_flags, int advice); | |
e1b9996b | 154 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
155 | unsigned long start, |
156 | unsigned long end, | |
157 | long adjust_next); | |
b6ec57f4 KS |
158 | extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, |
159 | struct vm_area_struct *vma); | |
a00cc7d9 MW |
160 | extern spinlock_t *__pud_trans_huge_lock(pud_t *pud, |
161 | struct vm_area_struct *vma); | |
025c5b24 | 162 | /* mmap_sem must be held on entry */ |
b6ec57f4 KS |
163 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
164 | struct vm_area_struct *vma) | |
025c5b24 | 165 | { |
81d1b09c | 166 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
5c7fb56e | 167 | if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 168 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 169 | else |
969e8d7e | 170 | return NULL; |
025c5b24 | 171 | } |
a00cc7d9 MW |
172 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
173 | struct vm_area_struct *vma) | |
174 | { | |
175 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); | |
176 | if (pud_trans_huge(*pud) || pud_devmap(*pud)) | |
177 | return __pud_trans_huge_lock(pud, vma); | |
178 | else | |
179 | return NULL; | |
180 | } | |
2c888cfb RR |
181 | static inline int hpage_nr_pages(struct page *page) |
182 | { | |
183 | if (unlikely(PageTransHuge(page))) | |
184 | return HPAGE_PMD_NR; | |
185 | return 1; | |
186 | } | |
d10e63f2 | 187 | |
a00cc7d9 MW |
188 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
189 | pmd_t *pmd, int flags); | |
190 | struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, | |
191 | pud_t *pud, int flags); | |
192 | ||
82b0f8c3 | 193 | extern int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd); |
d10e63f2 | 194 | |
56873f43 WY |
195 | extern struct page *huge_zero_page; |
196 | ||
197 | static inline bool is_huge_zero_page(struct page *page) | |
198 | { | |
199 | return ACCESS_ONCE(huge_zero_page) == page; | |
200 | } | |
201 | ||
fc437044 MW |
202 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
203 | { | |
204 | return is_huge_zero_page(pmd_page(pmd)); | |
205 | } | |
206 | ||
a00cc7d9 MW |
207 | static inline bool is_huge_zero_pud(pud_t pud) |
208 | { | |
209 | return false; | |
210 | } | |
211 | ||
6fcb52a5 AL |
212 | struct page *mm_get_huge_zero_page(struct mm_struct *mm); |
213 | void mm_put_huge_zero_page(struct mm_struct *mm); | |
fc437044 | 214 | |
10102459 KS |
215 | #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) |
216 | ||
71e3aac0 | 217 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
218 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
219 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
220 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 221 | |
a00cc7d9 MW |
222 | #define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; }) |
223 | #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) | |
224 | #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) | |
225 | ||
2c888cfb RR |
226 | #define hpage_nr_pages(x) 1 |
227 | ||
71e3aac0 AA |
228 | #define transparent_hugepage_enabled(__vma) 0 |
229 | ||
800d8c63 KS |
230 | static inline void prep_transhuge_page(struct page *page) {} |
231 | ||
71e3aac0 | 232 | #define transparent_hugepage_flags 0UL |
74d2fad1 TK |
233 | |
234 | #define thp_get_unmapped_area NULL | |
235 | ||
b8f593cd HY |
236 | static inline bool |
237 | can_split_huge_page(struct page *page, int *pextra_pins) | |
238 | { | |
239 | BUILD_BUG(); | |
240 | return false; | |
241 | } | |
5bc7b8ac SL |
242 | static inline int |
243 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
244 | { | |
245 | return 0; | |
246 | } | |
71e3aac0 AA |
247 | static inline int split_huge_page(struct page *page) |
248 | { | |
249 | return 0; | |
250 | } | |
9a982250 | 251 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 252 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 253 | do { } while (0) |
2a52bcbc | 254 | |
fd60775a DR |
255 | static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
256 | unsigned long address, bool freeze, struct page *page) {} | |
2a52bcbc | 257 | static inline void split_huge_pmd_address(struct vm_area_struct *vma, |
fec89c10 | 258 | unsigned long address, bool freeze, struct page *page) {} |
2a52bcbc | 259 | |
a00cc7d9 MW |
260 | #define split_huge_pud(__vma, __pmd, __address) \ |
261 | do { } while (0) | |
262 | ||
60ab3244 AA |
263 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
264 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
265 | { |
266 | BUG(); | |
267 | return 0; | |
268 | } | |
94fcc585 AA |
269 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
270 | unsigned long start, | |
271 | unsigned long end, | |
272 | long adjust_next) | |
273 | { | |
274 | } | |
b6ec57f4 KS |
275 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
276 | struct vm_area_struct *vma) | |
025c5b24 | 277 | { |
b6ec57f4 | 278 | return NULL; |
025c5b24 | 279 | } |
a00cc7d9 MW |
280 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
281 | struct vm_area_struct *vma) | |
282 | { | |
283 | return NULL; | |
284 | } | |
d10e63f2 | 285 | |
82b0f8c3 | 286 | static inline int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd) |
d10e63f2 | 287 | { |
4daae3b4 | 288 | return 0; |
d10e63f2 MG |
289 | } |
290 | ||
56873f43 WY |
291 | static inline bool is_huge_zero_page(struct page *page) |
292 | { | |
293 | return false; | |
294 | } | |
295 | ||
a00cc7d9 MW |
296 | static inline bool is_huge_zero_pud(pud_t pud) |
297 | { | |
298 | return false; | |
299 | } | |
300 | ||
6fcb52a5 | 301 | static inline void mm_put_huge_zero_page(struct mm_struct *mm) |
aa88b68c | 302 | { |
6fcb52a5 | 303 | return; |
aa88b68c | 304 | } |
3565fce3 DW |
305 | |
306 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
307 | unsigned long addr, pmd_t *pmd, int flags) | |
308 | { | |
309 | return NULL; | |
310 | } | |
a00cc7d9 MW |
311 | |
312 | static inline struct page *follow_devmap_pud(struct vm_area_struct *vma, | |
313 | unsigned long addr, pud_t *pud, int flags) | |
314 | { | |
315 | return NULL; | |
316 | } | |
71e3aac0 AA |
317 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
318 | ||
319 | #endif /* _LINUX_HUGE_MM_H */ |