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