Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
71e3aac0 AA |
2 | #ifndef _LINUX_HUGE_MM_H |
3 | #define _LINUX_HUGE_MM_H | |
4 | ||
16981d76 DW |
5 | #include <linux/sched/coredump.h> |
6 | ||
baabda26 DW |
7 | #include <linux/fs.h> /* only for vma_is_dax() */ |
8 | ||
82b0f8c3 | 9 | extern int do_huge_pmd_anonymous_page(struct vm_fault *vmf); |
71e3aac0 AA |
10 | extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
11 | pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, | |
12 | struct vm_area_struct *vma); | |
82b0f8c3 | 13 | extern void huge_pmd_set_accessed(struct vm_fault *vmf, pmd_t orig_pmd); |
a00cc7d9 MW |
14 | extern int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm, |
15 | pud_t *dst_pud, pud_t *src_pud, unsigned long addr, | |
16 | struct vm_area_struct *vma); | |
17 | ||
18 | #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD | |
19 | extern void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud); | |
20 | #else | |
21 | static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) | |
22 | { | |
23 | } | |
24 | #endif | |
25 | ||
82b0f8c3 | 26 | extern int do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd); |
b676b293 | 27 | extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, |
71e3aac0 AA |
28 | unsigned long addr, |
29 | pmd_t *pmd, | |
30 | unsigned int flags); | |
319904ad | 31 | extern bool madvise_free_huge_pmd(struct mmu_gather *tlb, |
b8d3c4c3 MK |
32 | struct vm_area_struct *vma, |
33 | pmd_t *pmd, unsigned long addr, unsigned long next); | |
71e3aac0 AA |
34 | extern int zap_huge_pmd(struct mmu_gather *tlb, |
35 | struct vm_area_struct *vma, | |
f21760b1 | 36 | pmd_t *pmd, unsigned long addr); |
a00cc7d9 MW |
37 | extern int zap_huge_pud(struct mmu_gather *tlb, |
38 | struct vm_area_struct *vma, | |
39 | pud_t *pud, unsigned long addr); | |
0ca1634d JW |
40 | extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
41 | unsigned long addr, unsigned long end, | |
42 | unsigned char *vec); | |
bf8616d5 | 43 | extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, |
37a1c49a | 44 | unsigned long new_addr, unsigned long old_end, |
5d190420 | 45 | pmd_t *old_pmd, pmd_t *new_pmd, bool *need_flush); |
cd7548ab | 46 | extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
4b10e7d5 MG |
47 | unsigned long addr, pgprot_t newprot, |
48 | int prot_numa); | |
a00cc7d9 MW |
49 | int vmf_insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, |
50 | pmd_t *pmd, pfn_t pfn, bool write); | |
51 | int vmf_insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr, | |
52 | pud_t *pud, pfn_t pfn, bool write); | |
71e3aac0 AA |
53 | enum transparent_hugepage_flag { |
54 | TRANSPARENT_HUGEPAGE_FLAG, | |
55 | TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, | |
444eb2a4 MG |
56 | TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, |
57 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, | |
21440d7e | 58 | TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, |
71e3aac0 | 59 | TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, |
ba76149f | 60 | TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, |
79da5407 | 61 | TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, |
71e3aac0 AA |
62 | #ifdef CONFIG_DEBUG_VM |
63 | TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, | |
64 | #endif | |
65 | }; | |
66 | ||
b46e756f KS |
67 | struct kobject; |
68 | struct kobj_attribute; | |
69 | ||
70 | extern ssize_t single_hugepage_flag_store(struct kobject *kobj, | |
71 | struct kobj_attribute *attr, | |
72 | const char *buf, size_t count, | |
73 | enum transparent_hugepage_flag flag); | |
74 | extern ssize_t single_hugepage_flag_show(struct kobject *kobj, | |
75 | struct kobj_attribute *attr, char *buf, | |
76 | enum transparent_hugepage_flag flag); | |
5a6e75f8 KS |
77 | extern struct kobj_attribute shmem_enabled_attr; |
78 | ||
d8c37c48 NH |
79 | #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) |
80 | #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) | |
81 | ||
71e3aac0 | 82 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
fde52796 AK |
83 | #define HPAGE_PMD_SHIFT PMD_SHIFT |
84 | #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) | |
85 | #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) | |
71e3aac0 | 86 | |
a00cc7d9 MW |
87 | #define HPAGE_PUD_SHIFT PUD_SHIFT |
88 | #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) | |
89 | #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) | |
90 | ||
20995974 AS |
91 | extern bool is_vma_temporary_stack(struct vm_area_struct *vma); |
92 | ||
16981d76 DW |
93 | extern unsigned long transparent_hugepage_flags; |
94 | ||
95 | static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma) | |
96 | { | |
97 | if (vma->vm_flags & VM_NOHUGEPAGE) | |
98 | return false; | |
99 | ||
100 | if (is_vma_temporary_stack(vma)) | |
101 | return false; | |
102 | ||
103 | if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) | |
104 | return false; | |
105 | ||
106 | if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG)) | |
107 | return true; | |
108 | ||
baabda26 DW |
109 | if (vma_is_dax(vma)) |
110 | return true; | |
111 | ||
16981d76 DW |
112 | if (transparent_hugepage_flags & |
113 | (1 << TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) | |
114 | return !!(vma->vm_flags & VM_HUGEPAGE); | |
115 | ||
116 | return false; | |
117 | } | |
118 | ||
79da5407 KS |
119 | #define transparent_hugepage_use_zero_page() \ |
120 | (transparent_hugepage_flags & \ | |
121 | (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) | |
71e3aac0 AA |
122 | #ifdef CONFIG_DEBUG_VM |
123 | #define transparent_hugepage_debug_cow() \ | |
124 | (transparent_hugepage_flags & \ | |
125 | (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) | |
126 | #else /* CONFIG_DEBUG_VM */ | |
127 | #define transparent_hugepage_debug_cow() 0 | |
128 | #endif /* CONFIG_DEBUG_VM */ | |
129 | ||
74d2fad1 TK |
130 | extern unsigned long thp_get_unmapped_area(struct file *filp, |
131 | unsigned long addr, unsigned long len, unsigned long pgoff, | |
132 | unsigned long flags); | |
133 | ||
9a982250 KS |
134 | extern void prep_transhuge_page(struct page *page); |
135 | extern void free_transhuge_page(struct page *page); | |
136 | ||
b8f593cd | 137 | bool can_split_huge_page(struct page *page, int *pextra_pins); |
e9b61f19 KS |
138 | int split_huge_page_to_list(struct page *page, struct list_head *list); |
139 | static inline int split_huge_page(struct page *page) | |
140 | { | |
141 | return split_huge_page_to_list(page, NULL); | |
142 | } | |
9a982250 | 143 | void deferred_split_huge_page(struct page *page); |
eef1b3ba KS |
144 | |
145 | void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, | |
33f4751e | 146 | unsigned long address, bool freeze, struct page *page); |
eef1b3ba KS |
147 | |
148 | #define split_huge_pmd(__vma, __pmd, __address) \ | |
149 | do { \ | |
150 | pmd_t *____pmd = (__pmd); \ | |
84c3fc4e | 151 | if (is_swap_pmd(*____pmd) || pmd_trans_huge(*____pmd) \ |
5c7fb56e | 152 | || pmd_devmap(*____pmd)) \ |
fec89c10 | 153 | __split_huge_pmd(__vma, __pmd, __address, \ |
33f4751e | 154 | false, NULL); \ |
eef1b3ba | 155 | } while (0) |
ad0bed24 | 156 | |
2a52bcbc | 157 | |
fec89c10 KS |
158 | void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, |
159 | bool freeze, struct page *page); | |
2a52bcbc | 160 | |
a00cc7d9 MW |
161 | void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud, |
162 | unsigned long address); | |
163 | ||
164 | #define split_huge_pud(__vma, __pud, __address) \ | |
165 | do { \ | |
166 | pud_t *____pud = (__pud); \ | |
167 | if (pud_trans_huge(*____pud) \ | |
168 | || pud_devmap(*____pud)) \ | |
169 | __split_huge_pud(__vma, __pud, __address); \ | |
170 | } while (0) | |
171 | ||
60ab3244 AA |
172 | extern int hugepage_madvise(struct vm_area_struct *vma, |
173 | unsigned long *vm_flags, int advice); | |
e1b9996b | 174 | extern void vma_adjust_trans_huge(struct vm_area_struct *vma, |
94fcc585 AA |
175 | unsigned long start, |
176 | unsigned long end, | |
177 | long adjust_next); | |
b6ec57f4 KS |
178 | extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, |
179 | struct vm_area_struct *vma); | |
a00cc7d9 MW |
180 | extern spinlock_t *__pud_trans_huge_lock(pud_t *pud, |
181 | struct vm_area_struct *vma); | |
84c3fc4e ZY |
182 | |
183 | static inline int is_swap_pmd(pmd_t pmd) | |
184 | { | |
185 | return !pmd_none(pmd) && !pmd_present(pmd); | |
186 | } | |
187 | ||
025c5b24 | 188 | /* mmap_sem must be held on entry */ |
b6ec57f4 KS |
189 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
190 | struct vm_area_struct *vma) | |
025c5b24 | 191 | { |
81d1b09c | 192 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); |
84c3fc4e | 193 | if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) |
b6ec57f4 | 194 | return __pmd_trans_huge_lock(pmd, vma); |
025c5b24 | 195 | else |
969e8d7e | 196 | return NULL; |
025c5b24 | 197 | } |
a00cc7d9 MW |
198 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
199 | struct vm_area_struct *vma) | |
200 | { | |
201 | VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); | |
202 | if (pud_trans_huge(*pud) || pud_devmap(*pud)) | |
203 | return __pud_trans_huge_lock(pud, vma); | |
204 | else | |
205 | return NULL; | |
206 | } | |
2c888cfb RR |
207 | static inline int hpage_nr_pages(struct page *page) |
208 | { | |
209 | if (unlikely(PageTransHuge(page))) | |
210 | return HPAGE_PMD_NR; | |
211 | return 1; | |
212 | } | |
d10e63f2 | 213 | |
a00cc7d9 MW |
214 | struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, |
215 | pmd_t *pmd, int flags); | |
216 | struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, | |
217 | pud_t *pud, int flags); | |
218 | ||
82b0f8c3 | 219 | extern int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd); |
d10e63f2 | 220 | |
56873f43 WY |
221 | extern struct page *huge_zero_page; |
222 | ||
223 | static inline bool is_huge_zero_page(struct page *page) | |
224 | { | |
6aa7de05 | 225 | return READ_ONCE(huge_zero_page) == page; |
56873f43 WY |
226 | } |
227 | ||
fc437044 MW |
228 | static inline bool is_huge_zero_pmd(pmd_t pmd) |
229 | { | |
230 | return is_huge_zero_page(pmd_page(pmd)); | |
231 | } | |
232 | ||
a00cc7d9 MW |
233 | static inline bool is_huge_zero_pud(pud_t pud) |
234 | { | |
235 | return false; | |
236 | } | |
237 | ||
6fcb52a5 AL |
238 | struct page *mm_get_huge_zero_page(struct mm_struct *mm); |
239 | void mm_put_huge_zero_page(struct mm_struct *mm); | |
fc437044 | 240 | |
10102459 KS |
241 | #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) |
242 | ||
9c670ea3 NH |
243 | static inline bool thp_migration_supported(void) |
244 | { | |
245 | return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION); | |
246 | } | |
247 | ||
71e3aac0 | 248 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d8c37c48 NH |
249 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) |
250 | #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) | |
251 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) | |
71e3aac0 | 252 | |
a00cc7d9 MW |
253 | #define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; }) |
254 | #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) | |
255 | #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) | |
256 | ||
2c888cfb RR |
257 | #define hpage_nr_pages(x) 1 |
258 | ||
16981d76 DW |
259 | static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma) |
260 | { | |
261 | return false; | |
262 | } | |
71e3aac0 | 263 | |
800d8c63 KS |
264 | static inline void prep_transhuge_page(struct page *page) {} |
265 | ||
71e3aac0 | 266 | #define transparent_hugepage_flags 0UL |
74d2fad1 TK |
267 | |
268 | #define thp_get_unmapped_area NULL | |
269 | ||
b8f593cd HY |
270 | static inline bool |
271 | can_split_huge_page(struct page *page, int *pextra_pins) | |
272 | { | |
273 | BUILD_BUG(); | |
274 | return false; | |
275 | } | |
5bc7b8ac SL |
276 | static inline int |
277 | split_huge_page_to_list(struct page *page, struct list_head *list) | |
278 | { | |
279 | return 0; | |
280 | } | |
71e3aac0 AA |
281 | static inline int split_huge_page(struct page *page) |
282 | { | |
283 | return 0; | |
284 | } | |
9a982250 | 285 | static inline void deferred_split_huge_page(struct page *page) {} |
78ddc534 | 286 | #define split_huge_pmd(__vma, __pmd, __address) \ |
e180377f | 287 | do { } while (0) |
2a52bcbc | 288 | |
fd60775a DR |
289 | static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
290 | unsigned long address, bool freeze, struct page *page) {} | |
2a52bcbc | 291 | static inline void split_huge_pmd_address(struct vm_area_struct *vma, |
fec89c10 | 292 | unsigned long address, bool freeze, struct page *page) {} |
2a52bcbc | 293 | |
a00cc7d9 MW |
294 | #define split_huge_pud(__vma, __pmd, __address) \ |
295 | do { } while (0) | |
296 | ||
60ab3244 AA |
297 | static inline int hugepage_madvise(struct vm_area_struct *vma, |
298 | unsigned long *vm_flags, int advice) | |
0af4e98b AA |
299 | { |
300 | BUG(); | |
301 | return 0; | |
302 | } | |
94fcc585 AA |
303 | static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, |
304 | unsigned long start, | |
305 | unsigned long end, | |
306 | long adjust_next) | |
307 | { | |
308 | } | |
84c3fc4e ZY |
309 | static inline int is_swap_pmd(pmd_t pmd) |
310 | { | |
311 | return 0; | |
312 | } | |
b6ec57f4 KS |
313 | static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, |
314 | struct vm_area_struct *vma) | |
025c5b24 | 315 | { |
b6ec57f4 | 316 | return NULL; |
025c5b24 | 317 | } |
a00cc7d9 MW |
318 | static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, |
319 | struct vm_area_struct *vma) | |
320 | { | |
321 | return NULL; | |
322 | } | |
d10e63f2 | 323 | |
82b0f8c3 | 324 | static inline int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd) |
d10e63f2 | 325 | { |
4daae3b4 | 326 | return 0; |
d10e63f2 MG |
327 | } |
328 | ||
56873f43 WY |
329 | static inline bool is_huge_zero_page(struct page *page) |
330 | { | |
331 | return false; | |
332 | } | |
333 | ||
a00cc7d9 MW |
334 | static inline bool is_huge_zero_pud(pud_t pud) |
335 | { | |
336 | return false; | |
337 | } | |
338 | ||
6fcb52a5 | 339 | static inline void mm_put_huge_zero_page(struct mm_struct *mm) |
aa88b68c | 340 | { |
6fcb52a5 | 341 | return; |
aa88b68c | 342 | } |
3565fce3 DW |
343 | |
344 | static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, | |
345 | unsigned long addr, pmd_t *pmd, int flags) | |
346 | { | |
347 | return NULL; | |
348 | } | |
a00cc7d9 MW |
349 | |
350 | static inline struct page *follow_devmap_pud(struct vm_area_struct *vma, | |
351 | unsigned long addr, pud_t *pud, int flags) | |
352 | { | |
353 | return NULL; | |
354 | } | |
9c670ea3 NH |
355 | |
356 | static inline bool thp_migration_supported(void) | |
357 | { | |
358 | return false; | |
359 | } | |
71e3aac0 AA |
360 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
361 | ||
362 | #endif /* _LINUX_HUGE_MM_H */ |