Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_HUGETLB_H |
3 | #define _LINUX_HUGETLB_H | |
4 | ||
be93d8cf | 5 | #include <linux/mm_types.h> |
309381fe | 6 | #include <linux/mmdebug.h> |
4e950f6f | 7 | #include <linux/fs.h> |
8edf344c | 8 | #include <linux/hugetlb_inline.h> |
abb8206c | 9 | #include <linux/cgroup.h> |
9119a41e JK |
10 | #include <linux/list.h> |
11 | #include <linux/kref.h> | |
ca5999fd | 12 | #include <linux/pgtable.h> |
d92bbc27 | 13 | #include <linux/gfp.h> |
f6191471 | 14 | #include <linux/userfaultfd_k.h> |
4e950f6f | 15 | |
e9ea0e2d AM |
16 | struct ctl_table; |
17 | struct user_struct; | |
24669e58 | 18 | struct mmu_gather; |
e9ea0e2d | 19 | |
e2299292 | 20 | #ifndef is_hugepd |
e2299292 AK |
21 | typedef struct { unsigned long pd; } hugepd_t; |
22 | #define is_hugepd(hugepd) (0) | |
23 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
e2299292 AK |
24 | #endif |
25 | ||
1da177e4 LT |
26 | #ifdef CONFIG_HUGETLB_PAGE |
27 | ||
28 | #include <linux/mempolicy.h> | |
516dffdc | 29 | #include <linux/shm.h> |
63551ae0 | 30 | #include <asm/tlbflush.h> |
1da177e4 | 31 | |
cd39d4e9 MS |
32 | /* |
33 | * For HugeTLB page, there are more metadata to save in the struct page. But | |
34 | * the head struct page cannot meet our needs, so we have to abuse other tail | |
35 | * struct page to store the metadata. In order to avoid conflicts caused by | |
36 | * subsequent use of more tail struct pages, we gather these discrete indexes | |
37 | * of tail struct page here. | |
38 | */ | |
39 | enum { | |
40 | SUBPAGE_INDEX_SUBPOOL = 1, /* reuse page->private */ | |
41 | #ifdef CONFIG_CGROUP_HUGETLB | |
42 | SUBPAGE_INDEX_CGROUP, /* reuse page->private */ | |
43 | SUBPAGE_INDEX_CGROUP_RSVD, /* reuse page->private */ | |
44 | __MAX_CGROUP_SUBPAGE_INDEX = SUBPAGE_INDEX_CGROUP_RSVD, | |
161df60e NH |
45 | #endif |
46 | #ifdef CONFIG_MEMORY_FAILURE | |
47 | SUBPAGE_INDEX_HWPOISON, | |
cd39d4e9 MS |
48 | #endif |
49 | __NR_USED_SUBPAGE, | |
50 | }; | |
51 | ||
90481622 DG |
52 | struct hugepage_subpool { |
53 | spinlock_t lock; | |
54 | long count; | |
c6a91820 MK |
55 | long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
56 | long used_hpages; /* Used count against maximum, includes */ | |
06c88398 | 57 | /* both allocated and reserved pages. */ |
c6a91820 MK |
58 | struct hstate *hstate; |
59 | long min_hpages; /* Minimum huge pages or -1 if no minimum. */ | |
60 | long rsv_hpages; /* Pages reserved against global pool to */ | |
6c26d310 | 61 | /* satisfy minimum size. */ |
90481622 DG |
62 | }; |
63 | ||
9119a41e JK |
64 | struct resv_map { |
65 | struct kref refs; | |
7b24d861 | 66 | spinlock_t lock; |
9119a41e | 67 | struct list_head regions; |
5e911373 MK |
68 | long adds_in_progress; |
69 | struct list_head region_cache; | |
70 | long region_cache_count; | |
e9fe92ae MA |
71 | #ifdef CONFIG_CGROUP_HUGETLB |
72 | /* | |
73 | * On private mappings, the counter to uncharge reservations is stored | |
74 | * here. If these fields are 0, then either the mapping is shared, or | |
75 | * cgroup accounting is disabled for this resv_map. | |
76 | */ | |
77 | struct page_counter *reservation_counter; | |
78 | unsigned long pages_per_hpage; | |
79 | struct cgroup_subsys_state *css; | |
80 | #endif | |
9119a41e | 81 | }; |
075a61d0 MA |
82 | |
83 | /* | |
84 | * Region tracking -- allows tracking of reservations and instantiated pages | |
85 | * across the pages in a mapping. | |
86 | * | |
87 | * The region data structures are embedded into a resv_map and protected | |
88 | * by a resv_map's lock. The set of regions within the resv_map represent | |
89 | * reservations for huge pages, or huge pages that have already been | |
90 | * instantiated within the map. The from and to elements are huge page | |
06c88398 | 91 | * indices into the associated mapping. from indicates the starting index |
075a61d0 MA |
92 | * of the region. to represents the first index past the end of the region. |
93 | * | |
94 | * For example, a file region structure with from == 0 and to == 4 represents | |
95 | * four huge pages in a mapping. It is important to note that the to element | |
96 | * represents the first element past the end of the region. This is used in | |
97 | * arithmetic as 4(to) - 0(from) = 4 huge pages in the region. | |
98 | * | |
99 | * Interval notation of the form [from, to) will be used to indicate that | |
100 | * the endpoint from is inclusive and to is exclusive. | |
101 | */ | |
102 | struct file_region { | |
103 | struct list_head link; | |
104 | long from; | |
105 | long to; | |
106 | #ifdef CONFIG_CGROUP_HUGETLB | |
107 | /* | |
108 | * On shared mappings, each reserved region appears as a struct | |
109 | * file_region in resv_map. These fields hold the info needed to | |
110 | * uncharge each reservation. | |
111 | */ | |
112 | struct page_counter *reservation_counter; | |
113 | struct cgroup_subsys_state *css; | |
114 | #endif | |
115 | }; | |
116 | ||
9119a41e JK |
117 | extern struct resv_map *resv_map_alloc(void); |
118 | void resv_map_release(struct kref *ref); | |
119 | ||
c3f38a38 AK |
120 | extern spinlock_t hugetlb_lock; |
121 | extern int hugetlb_max_hstate __read_mostly; | |
122 | #define for_each_hstate(h) \ | |
123 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
124 | ||
7ca02d0a MK |
125 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
126 | long min_hpages); | |
90481622 DG |
127 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
128 | ||
a1e78772 | 129 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
550a7d60 | 130 | void clear_vma_resv_huge_pages(struct vm_area_struct *vma); |
32927393 CH |
131 | int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); |
132 | int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, | |
133 | loff_t *); | |
134 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, | |
135 | loff_t *); | |
136 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, | |
137 | loff_t *); | |
06808b08 | 138 | |
550a7d60 MA |
139 | int move_hugetlb_page_tables(struct vm_area_struct *vma, |
140 | struct vm_area_struct *new_vma, | |
141 | unsigned long old_addr, unsigned long new_addr, | |
142 | unsigned long len); | |
bc70fbf2 PX |
143 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, |
144 | struct vm_area_struct *, struct vm_area_struct *); | |
28a35716 ML |
145 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
146 | struct page **, struct vm_area_struct **, | |
87ffc118 AA |
147 | unsigned long *, unsigned long *, long, unsigned int, |
148 | int *); | |
04f2cbe3 | 149 | void unmap_hugepage_range(struct vm_area_struct *, |
05e90bd0 PX |
150 | unsigned long, unsigned long, struct page *, |
151 | zap_flags_t); | |
d833352a MG |
152 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
153 | struct vm_area_struct *vma, | |
154 | unsigned long start, unsigned long end, | |
05e90bd0 | 155 | struct page *ref_page, zap_flags_t zap_flags); |
e1759c21 | 156 | void hugetlb_report_meminfo(struct seq_file *); |
7981593b | 157 | int hugetlb_report_node_meminfo(char *buf, int len, int nid); |
dcadcf1c | 158 | void hugetlb_show_meminfo_node(int nid); |
1da177e4 | 159 | unsigned long hugetlb_total_pages(void); |
2b740303 | 160 | vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 161 | unsigned long address, unsigned int flags); |
714c1891 | 162 | #ifdef CONFIG_USERFAULTFD |
8fb5debc MK |
163 | int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, |
164 | struct vm_area_struct *dst_vma, | |
165 | unsigned long dst_addr, | |
166 | unsigned long src_addr, | |
f6191471 | 167 | enum mcopy_atomic_mode mode, |
6041c691 PX |
168 | struct page **pagep, |
169 | bool wp_copy); | |
714c1891 | 170 | #endif /* CONFIG_USERFAULTFD */ |
33b8f84a | 171 | bool hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 172 | struct vm_area_struct *vma, |
ca16d140 | 173 | vm_flags_t vm_flags); |
b5cec28d MK |
174 | long hugetlb_unreserve_pages(struct inode *inode, long start, long end, |
175 | long freed); | |
7ce82f4c | 176 | int isolate_hugetlb(struct page *page, struct list_head *list); |
25182f05 | 177 | int get_hwpoison_huge_page(struct page *page, bool *hugetlb); |
405ce051 | 178 | int get_huge_page_for_hwpoison(unsigned long pfn, int flags); |
31caf665 | 179 | void putback_active_hugepage(struct page *page); |
ab5ac90a | 180 | void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason); |
8f1d26d0 | 181 | void free_huge_page(struct page *page); |
72e2936c | 182 | void hugetlb_fix_reserve_counts(struct inode *inode); |
c672c7f2 | 183 | extern struct mutex *hugetlb_fault_mutex_table; |
188b04a7 | 184 | u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx); |
1da177e4 | 185 | |
aec44e0f PX |
186 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma, |
187 | unsigned long addr, pud_t *pud); | |
3212b535 | 188 | |
c0d0381a MK |
189 | struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage); |
190 | ||
1da177e4 | 191 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 192 | extern struct list_head huge_boot_pages; |
1da177e4 | 193 | |
63551ae0 DG |
194 | /* arch callbacks */ |
195 | ||
aec44e0f | 196 | pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, |
a5516438 | 197 | unsigned long addr, unsigned long sz); |
7868a208 PA |
198 | pte_t *huge_pte_offset(struct mm_struct *mm, |
199 | unsigned long addr, unsigned long sz); | |
e95a9851 | 200 | unsigned long hugetlb_mask_last_page(struct hstate *h); |
34ae204f | 201 | int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, |
4ddb4d91 | 202 | unsigned long addr, pte_t *ptep); |
017b1660 MK |
203 | void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma, |
204 | unsigned long *start, unsigned long *end); | |
63551ae0 DG |
205 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
206 | int write); | |
4dc71451 AK |
207 | struct page *follow_huge_pd(struct vm_area_struct *vma, |
208 | unsigned long address, hugepd_t hpd, | |
209 | int flags, int pdshift); | |
63551ae0 | 210 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
e66f17ff | 211 | pmd_t *pmd, int flags); |
ceb86879 | 212 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 213 | pud_t *pud, int flags); |
faaa5b62 AK |
214 | struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, |
215 | pgd_t *pgd, int flags); | |
216 | ||
63551ae0 | 217 | int pmd_huge(pmd_t pmd); |
c2febafc | 218 | int pud_huge(pud_t pud); |
7da4d641 | 219 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
5a90d5a1 PX |
220 | unsigned long address, unsigned long end, pgprot_t newprot, |
221 | unsigned long cp_flags); | |
63551ae0 | 222 | |
d5ed7444 | 223 | bool is_hugetlb_entry_migration(pte_t pte); |
6dfeaff9 | 224 | void hugetlb_unshare_all_pmds(struct vm_area_struct *vma); |
ab5ac90a | 225 | |
1da177e4 LT |
226 | #else /* !CONFIG_HUGETLB_PAGE */ |
227 | ||
a1e78772 MG |
228 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
229 | { | |
230 | } | |
231 | ||
550a7d60 MA |
232 | static inline void clear_vma_resv_huge_pages(struct vm_area_struct *vma) |
233 | { | |
234 | } | |
235 | ||
1da177e4 LT |
236 | static inline unsigned long hugetlb_total_pages(void) |
237 | { | |
238 | return 0; | |
239 | } | |
240 | ||
c0d0381a MK |
241 | static inline struct address_space *hugetlb_page_mapping_lock_write( |
242 | struct page *hpage) | |
243 | { | |
244 | return NULL; | |
245 | } | |
246 | ||
34ae204f MK |
247 | static inline int huge_pmd_unshare(struct mm_struct *mm, |
248 | struct vm_area_struct *vma, | |
4ddb4d91 | 249 | unsigned long addr, pte_t *ptep) |
017b1660 MK |
250 | { |
251 | return 0; | |
252 | } | |
253 | ||
254 | static inline void adjust_range_if_pmd_sharing_possible( | |
255 | struct vm_area_struct *vma, | |
256 | unsigned long *start, unsigned long *end) | |
257 | { | |
258 | } | |
259 | ||
1f9dccb2 MK |
260 | static inline long follow_hugetlb_page(struct mm_struct *mm, |
261 | struct vm_area_struct *vma, struct page **pages, | |
262 | struct vm_area_struct **vmas, unsigned long *position, | |
263 | unsigned long *nr_pages, long i, unsigned int flags, | |
264 | int *nonblocking) | |
265 | { | |
266 | BUG(); | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static inline struct page *follow_huge_addr(struct mm_struct *mm, | |
271 | unsigned long address, int write) | |
272 | { | |
273 | return ERR_PTR(-EINVAL); | |
274 | } | |
275 | ||
276 | static inline int copy_hugetlb_page_range(struct mm_struct *dst, | |
bc70fbf2 PX |
277 | struct mm_struct *src, |
278 | struct vm_area_struct *dst_vma, | |
279 | struct vm_area_struct *src_vma) | |
1f9dccb2 MK |
280 | { |
281 | BUG(); | |
282 | return 0; | |
283 | } | |
284 | ||
550a7d60 MA |
285 | static inline int move_hugetlb_page_tables(struct vm_area_struct *vma, |
286 | struct vm_area_struct *new_vma, | |
287 | unsigned long old_addr, | |
288 | unsigned long new_addr, | |
289 | unsigned long len) | |
290 | { | |
291 | BUG(); | |
292 | return 0; | |
293 | } | |
294 | ||
e1759c21 AD |
295 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
296 | { | |
297 | } | |
1f9dccb2 | 298 | |
7981593b | 299 | static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid) |
1f9dccb2 MK |
300 | { |
301 | return 0; | |
302 | } | |
303 | ||
dcadcf1c | 304 | static inline void hugetlb_show_meminfo_node(int nid) |
949f7ec5 DR |
305 | { |
306 | } | |
1f9dccb2 MK |
307 | |
308 | static inline struct page *follow_huge_pd(struct vm_area_struct *vma, | |
309 | unsigned long address, hugepd_t hpd, int flags, | |
310 | int pdshift) | |
311 | { | |
312 | return NULL; | |
313 | } | |
314 | ||
315 | static inline struct page *follow_huge_pmd(struct mm_struct *mm, | |
316 | unsigned long address, pmd_t *pmd, int flags) | |
317 | { | |
318 | return NULL; | |
319 | } | |
320 | ||
321 | static inline struct page *follow_huge_pud(struct mm_struct *mm, | |
322 | unsigned long address, pud_t *pud, int flags) | |
323 | { | |
324 | return NULL; | |
325 | } | |
326 | ||
327 | static inline struct page *follow_huge_pgd(struct mm_struct *mm, | |
328 | unsigned long address, pgd_t *pgd, int flags) | |
329 | { | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | static inline int prepare_hugepage_range(struct file *file, | |
334 | unsigned long addr, unsigned long len) | |
335 | { | |
336 | return -EINVAL; | |
337 | } | |
338 | ||
339 | static inline int pmd_huge(pmd_t pmd) | |
340 | { | |
341 | return 0; | |
342 | } | |
343 | ||
344 | static inline int pud_huge(pud_t pud) | |
345 | { | |
346 | return 0; | |
347 | } | |
348 | ||
349 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
350 | unsigned long addr, unsigned long len) | |
351 | { | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
356 | unsigned long addr, unsigned long end, | |
357 | unsigned long floor, unsigned long ceiling) | |
358 | { | |
359 | BUG(); | |
360 | } | |
361 | ||
714c1891 | 362 | #ifdef CONFIG_USERFAULTFD |
1f9dccb2 MK |
363 | static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, |
364 | pte_t *dst_pte, | |
365 | struct vm_area_struct *dst_vma, | |
366 | unsigned long dst_addr, | |
367 | unsigned long src_addr, | |
f6191471 | 368 | enum mcopy_atomic_mode mode, |
6041c691 PX |
369 | struct page **pagep, |
370 | bool wp_copy) | |
1f9dccb2 MK |
371 | { |
372 | BUG(); | |
373 | return 0; | |
374 | } | |
714c1891 | 375 | #endif /* CONFIG_USERFAULTFD */ |
1f9dccb2 MK |
376 | |
377 | static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, | |
378 | unsigned long sz) | |
379 | { | |
380 | return NULL; | |
381 | } | |
24669e58 | 382 | |
7ce82f4c | 383 | static inline int isolate_hugetlb(struct page *page, struct list_head *list) |
f40386a4 | 384 | { |
7ce82f4c | 385 | return -EBUSY; |
f40386a4 | 386 | } |
1da177e4 | 387 | |
25182f05 NH |
388 | static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb) |
389 | { | |
390 | return 0; | |
391 | } | |
392 | ||
405ce051 NH |
393 | static inline int get_huge_page_for_hwpoison(unsigned long pfn, int flags) |
394 | { | |
395 | return 0; | |
396 | } | |
397 | ||
1f9dccb2 MK |
398 | static inline void putback_active_hugepage(struct page *page) |
399 | { | |
400 | } | |
401 | ||
402 | static inline void move_hugetlb_state(struct page *oldpage, | |
403 | struct page *newpage, int reason) | |
404 | { | |
405 | } | |
406 | ||
407 | static inline unsigned long hugetlb_change_protection( | |
408 | struct vm_area_struct *vma, unsigned long address, | |
5a90d5a1 PX |
409 | unsigned long end, pgprot_t newprot, |
410 | unsigned long cp_flags) | |
7da4d641 PZ |
411 | { |
412 | return 0; | |
413 | } | |
8f860591 | 414 | |
d833352a MG |
415 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
416 | struct vm_area_struct *vma, unsigned long start, | |
05e90bd0 PX |
417 | unsigned long end, struct page *ref_page, |
418 | zap_flags_t zap_flags) | |
d833352a MG |
419 | { |
420 | BUG(); | |
421 | } | |
422 | ||
a953e772 | 423 | static inline vm_fault_t hugetlb_fault(struct mm_struct *mm, |
1f9dccb2 MK |
424 | struct vm_area_struct *vma, unsigned long address, |
425 | unsigned int flags) | |
a953e772 SJ |
426 | { |
427 | BUG(); | |
428 | return 0; | |
429 | } | |
24669e58 | 430 | |
6dfeaff9 PX |
431 | static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { } |
432 | ||
1da177e4 | 433 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
434 | /* |
435 | * hugepages at page global directory. If arch support | |
436 | * hugepages at pgd level, they need to define this. | |
437 | */ | |
438 | #ifndef pgd_huge | |
439 | #define pgd_huge(x) 0 | |
440 | #endif | |
c2febafc KS |
441 | #ifndef p4d_huge |
442 | #define p4d_huge(x) 0 | |
443 | #endif | |
f30c59e9 AK |
444 | |
445 | #ifndef pgd_write | |
446 | static inline int pgd_write(pgd_t pgd) | |
447 | { | |
448 | BUG(); | |
449 | return 0; | |
450 | } | |
451 | #endif | |
452 | ||
4e52780d EM |
453 | #define HUGETLB_ANON_FILE "anon_hugepage" |
454 | ||
6bfde05b EM |
455 | enum { |
456 | /* | |
457 | * The file will be used as an shm file so shmfs accounting rules | |
458 | * apply | |
459 | */ | |
460 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
461 | /* |
462 | * The file is being created on the internal vfs mount and shmfs | |
463 | * accounting rules do not apply | |
464 | */ | |
465 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
466 | }; |
467 | ||
1da177e4 | 468 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 469 | struct hugetlbfs_sb_info { |
1da177e4 LT |
470 | long max_inodes; /* inodes allowed */ |
471 | long free_inodes; /* inodes free */ | |
472 | spinlock_t stat_lock; | |
a137e1cc | 473 | struct hstate *hstate; |
90481622 | 474 | struct hugepage_subpool *spool; |
4a25220d DH |
475 | kuid_t uid; |
476 | kgid_t gid; | |
477 | umode_t mode; | |
1da177e4 LT |
478 | }; |
479 | ||
1da177e4 LT |
480 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
481 | { | |
482 | return sb->s_fs_info; | |
483 | } | |
484 | ||
da14c1e5 MAL |
485 | struct hugetlbfs_inode_info { |
486 | struct shared_policy policy; | |
487 | struct inode vfs_inode; | |
ff62a342 | 488 | unsigned int seals; |
da14c1e5 MAL |
489 | }; |
490 | ||
491 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
492 | { | |
493 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
494 | } | |
495 | ||
4b6f5d20 | 496 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 497 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 498 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
83c1fd76 | 499 | int creat_flags, int page_size_log); |
1da177e4 | 500 | |
719ff321 | 501 | static inline bool is_file_hugepages(struct file *file) |
1da177e4 | 502 | { |
516dffdc | 503 | if (file->f_op == &hugetlbfs_file_operations) |
719ff321 | 504 | return true; |
516dffdc | 505 | |
719ff321 | 506 | return is_file_shm_hugepages(file); |
1da177e4 LT |
507 | } |
508 | ||
bb297bb2 CL |
509 | static inline struct hstate *hstate_inode(struct inode *i) |
510 | { | |
511 | return HUGETLBFS_SB(i->i_sb)->hstate; | |
512 | } | |
1da177e4 LT |
513 | #else /* !CONFIG_HUGETLBFS */ |
514 | ||
719ff321 | 515 | #define is_file_hugepages(file) false |
40716e29 | 516 | static inline struct file * |
af73e4d9 | 517 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
83c1fd76 | 518 | int creat_flags, int page_size_log) |
e9ea0e2d AM |
519 | { |
520 | return ERR_PTR(-ENOSYS); | |
521 | } | |
1da177e4 | 522 | |
bb297bb2 CL |
523 | static inline struct hstate *hstate_inode(struct inode *i) |
524 | { | |
525 | return NULL; | |
526 | } | |
1da177e4 LT |
527 | #endif /* !CONFIG_HUGETLBFS */ |
528 | ||
d2ba27e8 AB |
529 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
530 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
531 | unsigned long len, unsigned long pgoff, | |
532 | unsigned long flags); | |
533 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
534 | ||
4b439e25 CL |
535 | unsigned long |
536 | generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
537 | unsigned long len, unsigned long pgoff, | |
538 | unsigned long flags); | |
539 | ||
d6995da3 MK |
540 | /* |
541 | * huegtlb page specific state flags. These flags are located in page.private | |
542 | * of the hugetlb head page. Functions created via the below macros should be | |
543 | * used to manipulate these flags. | |
544 | * | |
545 | * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at | |
546 | * allocation time. Cleared when page is fully instantiated. Free | |
547 | * routine checks flag to restore a reservation on error paths. | |
d95c0337 MK |
548 | * Synchronization: Examined or modified by code that knows it has |
549 | * the only reference to page. i.e. After allocation but before use | |
550 | * or when the page is being freed. | |
8f251a3d MK |
551 | * HPG_migratable - Set after a newly allocated page is added to the page |
552 | * cache and/or page tables. Indicates the page is a candidate for | |
553 | * migration. | |
d95c0337 MK |
554 | * Synchronization: Initially set after new page allocation with no |
555 | * locking. When examined and modified during migration processing | |
556 | * (isolate, migrate, putback) the hugetlb_lock is held. | |
161df60e | 557 | * HPG_temporary - Set on a page that is temporarily allocated from the buddy |
9157c311 MK |
558 | * allocator. Typically used for migration target pages when no pages |
559 | * are available in the pool. The hugetlb free page path will | |
560 | * immediately free pages with this flag set to the buddy allocator. | |
d95c0337 MK |
561 | * Synchronization: Can be set after huge page allocation from buddy when |
562 | * code knows it has only reference. All other examinations and | |
563 | * modifications require hugetlb_lock. | |
6c037149 | 564 | * HPG_freed - Set when page is on the free lists. |
d95c0337 | 565 | * Synchronization: hugetlb_lock held for examination and modification. |
ad2fa371 | 566 | * HPG_vmemmap_optimized - Set when the vmemmap pages of the page are freed. |
161df60e NH |
567 | * HPG_raw_hwp_unreliable - Set when the hugetlb page has a hwpoison sub-page |
568 | * that is not tracked by raw_hwp_page list. | |
d6995da3 MK |
569 | */ |
570 | enum hugetlb_page_flags { | |
571 | HPG_restore_reserve = 0, | |
8f251a3d | 572 | HPG_migratable, |
9157c311 | 573 | HPG_temporary, |
6c037149 | 574 | HPG_freed, |
ad2fa371 | 575 | HPG_vmemmap_optimized, |
161df60e | 576 | HPG_raw_hwp_unreliable, |
d6995da3 MK |
577 | __NR_HPAGEFLAGS, |
578 | }; | |
579 | ||
580 | /* | |
581 | * Macros to create test, set and clear function definitions for | |
582 | * hugetlb specific page flags. | |
583 | */ | |
584 | #ifdef CONFIG_HUGETLB_PAGE | |
585 | #define TESTHPAGEFLAG(uname, flname) \ | |
586 | static inline int HPage##uname(struct page *page) \ | |
587 | { return test_bit(HPG_##flname, &(page->private)); } | |
588 | ||
589 | #define SETHPAGEFLAG(uname, flname) \ | |
590 | static inline void SetHPage##uname(struct page *page) \ | |
591 | { set_bit(HPG_##flname, &(page->private)); } | |
592 | ||
593 | #define CLEARHPAGEFLAG(uname, flname) \ | |
594 | static inline void ClearHPage##uname(struct page *page) \ | |
595 | { clear_bit(HPG_##flname, &(page->private)); } | |
596 | #else | |
597 | #define TESTHPAGEFLAG(uname, flname) \ | |
598 | static inline int HPage##uname(struct page *page) \ | |
599 | { return 0; } | |
600 | ||
601 | #define SETHPAGEFLAG(uname, flname) \ | |
602 | static inline void SetHPage##uname(struct page *page) \ | |
603 | { } | |
604 | ||
605 | #define CLEARHPAGEFLAG(uname, flname) \ | |
606 | static inline void ClearHPage##uname(struct page *page) \ | |
607 | { } | |
608 | #endif | |
609 | ||
610 | #define HPAGEFLAG(uname, flname) \ | |
611 | TESTHPAGEFLAG(uname, flname) \ | |
612 | SETHPAGEFLAG(uname, flname) \ | |
613 | CLEARHPAGEFLAG(uname, flname) \ | |
614 | ||
615 | /* | |
616 | * Create functions associated with hugetlb page flags | |
617 | */ | |
618 | HPAGEFLAG(RestoreReserve, restore_reserve) | |
8f251a3d | 619 | HPAGEFLAG(Migratable, migratable) |
9157c311 | 620 | HPAGEFLAG(Temporary, temporary) |
6c037149 | 621 | HPAGEFLAG(Freed, freed) |
ad2fa371 | 622 | HPAGEFLAG(VmemmapOptimized, vmemmap_optimized) |
161df60e | 623 | HPAGEFLAG(RawHwpUnreliable, raw_hwp_unreliable) |
d6995da3 | 624 | |
a5516438 AK |
625 | #ifdef CONFIG_HUGETLB_PAGE |
626 | ||
a3437870 | 627 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
628 | /* Defines one hugetlb page size */ |
629 | struct hstate { | |
29383967 | 630 | struct mutex resize_lock; |
e8c5c824 LS |
631 | int next_nid_to_alloc; |
632 | int next_nid_to_free; | |
a5516438 | 633 | unsigned int order; |
79dfc695 | 634 | unsigned int demote_order; |
a5516438 AK |
635 | unsigned long mask; |
636 | unsigned long max_huge_pages; | |
637 | unsigned long nr_huge_pages; | |
638 | unsigned long free_huge_pages; | |
639 | unsigned long resv_huge_pages; | |
640 | unsigned long surplus_huge_pages; | |
641 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 642 | struct list_head hugepage_activelist; |
a5516438 | 643 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
b5389086 | 644 | unsigned int max_huge_pages_node[MAX_NUMNODES]; |
a5516438 AK |
645 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; |
646 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
647 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
648 | #ifdef CONFIG_CGROUP_HUGETLB |
649 | /* cgroup control files */ | |
f4776199 MA |
650 | struct cftype cgroup_files_dfl[8]; |
651 | struct cftype cgroup_files_legacy[10]; | |
abb8206c | 652 | #endif |
a3437870 | 653 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
654 | }; |
655 | ||
53ba51d2 JT |
656 | struct huge_bootmem_page { |
657 | struct list_head list; | |
658 | struct hstate *hstate; | |
659 | }; | |
660 | ||
ae37c7ff | 661 | int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list); |
70c3547e MK |
662 | struct page *alloc_huge_page(struct vm_area_struct *vma, |
663 | unsigned long addr, int avoid_reserve); | |
3e59fcb0 | 664 | struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
d92bbc27 | 665 | nodemask_t *nmask, gfp_t gfp_mask); |
389c8178 MH |
666 | struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, |
667 | unsigned long address); | |
ab76ad54 MK |
668 | int huge_add_to_page_cache(struct page *page, struct address_space *mapping, |
669 | pgoff_t idx); | |
846be085 MK |
670 | void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma, |
671 | unsigned long address, struct page *page); | |
bf50bab2 | 672 | |
53ba51d2 | 673 | /* arch callback */ |
b5389086 ZY |
674 | int __init __alloc_bootmem_huge_page(struct hstate *h, int nid); |
675 | int __init alloc_bootmem_huge_page(struct hstate *h, int nid); | |
676 | bool __init hugetlb_node_alloc_supported(void); | |
53ba51d2 | 677 | |
e5ff2159 | 678 | void __init hugetlb_add_hstate(unsigned order); |
ae94da89 | 679 | bool __init arch_hugetlb_valid_size(unsigned long size); |
e5ff2159 AK |
680 | struct hstate *size_to_hstate(unsigned long size); |
681 | ||
682 | #ifndef HUGE_MAX_HSTATE | |
683 | #define HUGE_MAX_HSTATE 1 | |
684 | #endif | |
685 | ||
686 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
687 | extern unsigned int default_hstate_idx; | |
688 | ||
689 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 690 | |
d6995da3 MK |
691 | /* |
692 | * hugetlb page subpool pointer located in hpage[1].private | |
693 | */ | |
694 | static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) | |
695 | { | |
cd39d4e9 | 696 | return (void *)page_private(hpage + SUBPAGE_INDEX_SUBPOOL); |
d6995da3 MK |
697 | } |
698 | ||
699 | static inline void hugetlb_set_page_subpool(struct page *hpage, | |
700 | struct hugepage_subpool *subpool) | |
701 | { | |
cd39d4e9 | 702 | set_page_private(hpage + SUBPAGE_INDEX_SUBPOOL, (unsigned long)subpool); |
d6995da3 MK |
703 | } |
704 | ||
a5516438 AK |
705 | static inline struct hstate *hstate_file(struct file *f) |
706 | { | |
496ad9aa | 707 | return hstate_inode(file_inode(f)); |
a5516438 AK |
708 | } |
709 | ||
af73e4d9 NH |
710 | static inline struct hstate *hstate_sizelog(int page_size_log) |
711 | { | |
712 | if (!page_size_log) | |
713 | return &default_hstate; | |
97ad2be1 SL |
714 | |
715 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
716 | } |
717 | ||
a137e1cc | 718 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 719 | { |
a137e1cc | 720 | return hstate_file(vma->vm_file); |
a5516438 AK |
721 | } |
722 | ||
6213834c | 723 | static inline unsigned long huge_page_size(const struct hstate *h) |
a5516438 AK |
724 | { |
725 | return (unsigned long)PAGE_SIZE << h->order; | |
726 | } | |
727 | ||
08fba699 MG |
728 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
729 | ||
3340289d MG |
730 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
731 | ||
a5516438 AK |
732 | static inline unsigned long huge_page_mask(struct hstate *h) |
733 | { | |
734 | return h->mask; | |
735 | } | |
736 | ||
737 | static inline unsigned int huge_page_order(struct hstate *h) | |
738 | { | |
739 | return h->order; | |
740 | } | |
741 | ||
742 | static inline unsigned huge_page_shift(struct hstate *h) | |
743 | { | |
744 | return h->order + PAGE_SHIFT; | |
745 | } | |
746 | ||
bae7f4ae LC |
747 | static inline bool hstate_is_gigantic(struct hstate *h) |
748 | { | |
749 | return huge_page_order(h) >= MAX_ORDER; | |
750 | } | |
751 | ||
6213834c | 752 | static inline unsigned int pages_per_huge_page(const struct hstate *h) |
a5516438 AK |
753 | { |
754 | return 1 << h->order; | |
755 | } | |
756 | ||
757 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
758 | { | |
759 | return huge_page_size(h) / 512; | |
760 | } | |
761 | ||
762 | #include <asm/hugetlb.h> | |
763 | ||
b0eae98c AK |
764 | #ifndef is_hugepage_only_range |
765 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
766 | unsigned long addr, unsigned long len) | |
767 | { | |
768 | return 0; | |
769 | } | |
770 | #define is_hugepage_only_range is_hugepage_only_range | |
771 | #endif | |
772 | ||
5be99343 AK |
773 | #ifndef arch_clear_hugepage_flags |
774 | static inline void arch_clear_hugepage_flags(struct page *page) { } | |
775 | #define arch_clear_hugepage_flags arch_clear_hugepage_flags | |
776 | #endif | |
777 | ||
d9ed9faa | 778 | #ifndef arch_make_huge_pte |
79c1c594 CL |
779 | static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, |
780 | vm_flags_t flags) | |
d9ed9faa | 781 | { |
16785bd7 | 782 | return pte_mkhuge(entry); |
d9ed9faa CM |
783 | } |
784 | #endif | |
785 | ||
e5ff2159 AK |
786 | static inline struct hstate *page_hstate(struct page *page) |
787 | { | |
309381fe | 788 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
a50b854e | 789 | return size_to_hstate(page_size(page)); |
e5ff2159 AK |
790 | } |
791 | ||
aa50d3a7 AK |
792 | static inline unsigned hstate_index_to_shift(unsigned index) |
793 | { | |
794 | return hstates[index].order + PAGE_SHIFT; | |
795 | } | |
796 | ||
972dc4de AK |
797 | static inline int hstate_index(struct hstate *h) |
798 | { | |
799 | return h - hstates; | |
800 | } | |
801 | ||
c3114a84 | 802 | extern int dissolve_free_huge_page(struct page *page); |
082d5b6b GS |
803 | extern int dissolve_free_huge_pages(unsigned long start_pfn, |
804 | unsigned long end_pfn); | |
e693de18 | 805 | |
161df60e NH |
806 | #ifdef CONFIG_MEMORY_FAILURE |
807 | extern void hugetlb_clear_page_hwpoison(struct page *hpage); | |
808 | #else | |
809 | static inline void hugetlb_clear_page_hwpoison(struct page *hpage) | |
810 | { | |
811 | } | |
812 | #endif | |
813 | ||
c177c81e | 814 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
e693de18 AK |
815 | #ifndef arch_hugetlb_migration_supported |
816 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) | |
817 | { | |
94310cbc | 818 | if ((huge_page_shift(h) == PMD_SHIFT) || |
9b553bf5 AK |
819 | (huge_page_shift(h) == PUD_SHIFT) || |
820 | (huge_page_shift(h) == PGDIR_SHIFT)) | |
94310cbc AK |
821 | return true; |
822 | else | |
823 | return false; | |
e693de18 AK |
824 | } |
825 | #endif | |
c177c81e | 826 | #else |
e693de18 AK |
827 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) |
828 | { | |
d70c17d4 | 829 | return false; |
e693de18 | 830 | } |
c177c81e | 831 | #endif |
e693de18 AK |
832 | |
833 | static inline bool hugepage_migration_supported(struct hstate *h) | |
834 | { | |
835 | return arch_hugetlb_migration_supported(h); | |
83467efb | 836 | } |
c8721bbb | 837 | |
7ed2c31d AK |
838 | /* |
839 | * Movability check is different as compared to migration check. | |
840 | * It determines whether or not a huge page should be placed on | |
841 | * movable zone or not. Movability of any huge page should be | |
842 | * required only if huge page size is supported for migration. | |
06c88398 | 843 | * There won't be any reason for the huge page to be movable if |
7ed2c31d AK |
844 | * it is not migratable to start with. Also the size of the huge |
845 | * page should be large enough to be placed under a movable zone | |
846 | * and still feasible enough to be migratable. Just the presence | |
847 | * in movable zone does not make the migration feasible. | |
848 | * | |
849 | * So even though large huge page sizes like the gigantic ones | |
850 | * are migratable they should not be movable because its not | |
851 | * feasible to migrate them from movable zone. | |
852 | */ | |
853 | static inline bool hugepage_movable_supported(struct hstate *h) | |
854 | { | |
855 | if (!hugepage_migration_supported(h)) | |
856 | return false; | |
857 | ||
858 | if (hstate_is_gigantic(h)) | |
859 | return false; | |
860 | return true; | |
861 | } | |
862 | ||
d92bbc27 JK |
863 | /* Movability of hugepages depends on migration support. */ |
864 | static inline gfp_t htlb_alloc_mask(struct hstate *h) | |
865 | { | |
866 | if (hugepage_movable_supported(h)) | |
867 | return GFP_HIGHUSER_MOVABLE; | |
868 | else | |
869 | return GFP_HIGHUSER; | |
870 | } | |
871 | ||
19fc7bed JK |
872 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
873 | { | |
874 | gfp_t modified_mask = htlb_alloc_mask(h); | |
875 | ||
876 | /* Some callers might want to enforce node */ | |
877 | modified_mask |= (gfp_mask & __GFP_THISNODE); | |
878 | ||
41b4dc14 JK |
879 | modified_mask |= (gfp_mask & __GFP_NOWARN); |
880 | ||
19fc7bed JK |
881 | return modified_mask; |
882 | } | |
883 | ||
cb900f41 KS |
884 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
885 | struct mm_struct *mm, pte_t *pte) | |
886 | { | |
887 | if (huge_page_size(h) == PMD_SIZE) | |
888 | return pmd_lockptr(mm, (pmd_t *) pte); | |
889 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
890 | return &mm->page_table_lock; | |
891 | } | |
892 | ||
2531c8cf DD |
893 | #ifndef hugepages_supported |
894 | /* | |
895 | * Some platform decide whether they support huge pages at boot | |
896 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
897 | * when there is no such support | |
898 | */ | |
899 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
900 | #endif | |
457c1b27 | 901 | |
5d317b2b NH |
902 | void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); |
903 | ||
13db8c50 LZ |
904 | static inline void hugetlb_count_init(struct mm_struct *mm) |
905 | { | |
906 | atomic_long_set(&mm->hugetlb_usage, 0); | |
907 | } | |
908 | ||
5d317b2b NH |
909 | static inline void hugetlb_count_add(long l, struct mm_struct *mm) |
910 | { | |
911 | atomic_long_add(l, &mm->hugetlb_usage); | |
912 | } | |
913 | ||
914 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
915 | { | |
916 | atomic_long_sub(l, &mm->hugetlb_usage); | |
917 | } | |
e5251fd4 | 918 | |
023bdd00 AK |
919 | #ifndef huge_ptep_modify_prot_start |
920 | #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start | |
921 | static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, | |
922 | unsigned long addr, pte_t *ptep) | |
923 | { | |
924 | return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); | |
925 | } | |
926 | #endif | |
927 | ||
928 | #ifndef huge_ptep_modify_prot_commit | |
929 | #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit | |
930 | static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, | |
931 | unsigned long addr, pte_t *ptep, | |
932 | pte_t old_pte, pte_t pte) | |
933 | { | |
934 | set_huge_pte_at(vma->vm_mm, addr, ptep, pte); | |
935 | } | |
936 | #endif | |
937 | ||
af73e4d9 | 938 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 939 | struct hstate {}; |
442a5a9a | 940 | |
6acfb5ba MS |
941 | static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) |
942 | { | |
943 | return NULL; | |
944 | } | |
945 | ||
ae37c7ff OS |
946 | static inline int isolate_or_dissolve_huge_page(struct page *page, |
947 | struct list_head *list) | |
369fa227 OS |
948 | { |
949 | return -ENOMEM; | |
950 | } | |
951 | ||
442a5a9a JG |
952 | static inline struct page *alloc_huge_page(struct vm_area_struct *vma, |
953 | unsigned long addr, | |
954 | int avoid_reserve) | |
955 | { | |
956 | return NULL; | |
957 | } | |
958 | ||
442a5a9a | 959 | static inline struct page * |
d92bbc27 JK |
960 | alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
961 | nodemask_t *nmask, gfp_t gfp_mask) | |
442a5a9a JG |
962 | { |
963 | return NULL; | |
964 | } | |
965 | ||
966 | static inline struct page *alloc_huge_page_vma(struct hstate *h, | |
967 | struct vm_area_struct *vma, | |
968 | unsigned long address) | |
969 | { | |
970 | return NULL; | |
971 | } | |
972 | ||
973 | static inline int __alloc_bootmem_huge_page(struct hstate *h) | |
974 | { | |
975 | return 0; | |
976 | } | |
977 | ||
978 | static inline struct hstate *hstate_file(struct file *f) | |
979 | { | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | static inline struct hstate *hstate_sizelog(int page_size_log) | |
984 | { | |
985 | return NULL; | |
986 | } | |
987 | ||
988 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) | |
989 | { | |
990 | return NULL; | |
442a5a9a JG |
991 | } |
992 | ||
993 | static inline struct hstate *page_hstate(struct page *page) | |
994 | { | |
995 | return NULL; | |
996 | } | |
997 | ||
2aff7a47 MWO |
998 | static inline struct hstate *size_to_hstate(unsigned long size) |
999 | { | |
1000 | return NULL; | |
1001 | } | |
1002 | ||
442a5a9a JG |
1003 | static inline unsigned long huge_page_size(struct hstate *h) |
1004 | { | |
1005 | return PAGE_SIZE; | |
1006 | } | |
1007 | ||
1008 | static inline unsigned long huge_page_mask(struct hstate *h) | |
1009 | { | |
1010 | return PAGE_MASK; | |
1011 | } | |
1012 | ||
1013 | static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) | |
1014 | { | |
1015 | return PAGE_SIZE; | |
1016 | } | |
1017 | ||
1018 | static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) | |
1019 | { | |
1020 | return PAGE_SIZE; | |
1021 | } | |
1022 | ||
1023 | static inline unsigned int huge_page_order(struct hstate *h) | |
1024 | { | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | static inline unsigned int huge_page_shift(struct hstate *h) | |
1029 | { | |
1030 | return PAGE_SHIFT; | |
1031 | } | |
1032 | ||
94310cbc AK |
1033 | static inline bool hstate_is_gigantic(struct hstate *h) |
1034 | { | |
1035 | return false; | |
1036 | } | |
1037 | ||
510a35d4 AR |
1038 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
1039 | { | |
1040 | return 1; | |
1041 | } | |
c3114a84 AK |
1042 | |
1043 | static inline unsigned hstate_index_to_shift(unsigned index) | |
1044 | { | |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static inline int hstate_index(struct hstate *h) | |
1049 | { | |
1050 | return 0; | |
1051 | } | |
13d60f4b | 1052 | |
c3114a84 AK |
1053 | static inline int dissolve_free_huge_page(struct page *page) |
1054 | { | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | static inline int dissolve_free_huge_pages(unsigned long start_pfn, | |
1059 | unsigned long end_pfn) | |
1060 | { | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static inline bool hugepage_migration_supported(struct hstate *h) | |
1065 | { | |
1066 | return false; | |
1067 | } | |
cb900f41 | 1068 | |
7ed2c31d AK |
1069 | static inline bool hugepage_movable_supported(struct hstate *h) |
1070 | { | |
1071 | return false; | |
1072 | } | |
1073 | ||
d92bbc27 JK |
1074 | static inline gfp_t htlb_alloc_mask(struct hstate *h) |
1075 | { | |
1076 | return 0; | |
1077 | } | |
1078 | ||
19fc7bed JK |
1079 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
1080 | { | |
1081 | return 0; | |
1082 | } | |
1083 | ||
cb900f41 KS |
1084 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
1085 | struct mm_struct *mm, pte_t *pte) | |
1086 | { | |
1087 | return &mm->page_table_lock; | |
1088 | } | |
5d317b2b | 1089 | |
13db8c50 LZ |
1090 | static inline void hugetlb_count_init(struct mm_struct *mm) |
1091 | { | |
1092 | } | |
1093 | ||
5d317b2b NH |
1094 | static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m) |
1095 | { | |
1096 | } | |
1097 | ||
1098 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
1099 | { | |
1100 | } | |
e5251fd4 | 1101 | |
5d4af619 BW |
1102 | static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma, |
1103 | unsigned long addr, pte_t *ptep) | |
1104 | { | |
1105 | return *ptep; | |
1106 | } | |
1107 | ||
1108 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
1109 | pte_t *ptep, pte_t pte) | |
1110 | { | |
1111 | } | |
af73e4d9 | 1112 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 1113 | |
cb900f41 KS |
1114 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
1115 | struct mm_struct *mm, pte_t *pte) | |
1116 | { | |
1117 | spinlock_t *ptl; | |
1118 | ||
1119 | ptl = huge_pte_lockptr(h, mm, pte); | |
1120 | spin_lock(ptl); | |
1121 | return ptl; | |
1122 | } | |
1123 | ||
cf11e85f RG |
1124 | #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA) |
1125 | extern void __init hugetlb_cma_reserve(int order); | |
cf11e85f RG |
1126 | #else |
1127 | static inline __init void hugetlb_cma_reserve(int order) | |
1128 | { | |
1129 | } | |
cf11e85f RG |
1130 | #endif |
1131 | ||
c1991e07 PX |
1132 | bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr); |
1133 | ||
537cf30b PX |
1134 | #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE |
1135 | /* | |
1136 | * ARCHes with special requirements for evicting HUGETLB backing TLB entries can | |
1137 | * implement this. | |
1138 | */ | |
1139 | #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) | |
1140 | #endif | |
1141 | ||
1da177e4 | 1142 | #endif /* _LINUX_HUGETLB_H */ |