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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, | |
45 | #endif | |
46 | __NR_USED_SUBPAGE, | |
47 | }; | |
48 | ||
90481622 DG |
49 | struct hugepage_subpool { |
50 | spinlock_t lock; | |
51 | long count; | |
c6a91820 MK |
52 | long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
53 | long used_hpages; /* Used count against maximum, includes */ | |
06c88398 | 54 | /* both allocated and reserved pages. */ |
c6a91820 MK |
55 | struct hstate *hstate; |
56 | long min_hpages; /* Minimum huge pages or -1 if no minimum. */ | |
57 | long rsv_hpages; /* Pages reserved against global pool to */ | |
6c26d310 | 58 | /* satisfy minimum size. */ |
90481622 DG |
59 | }; |
60 | ||
9119a41e JK |
61 | struct resv_map { |
62 | struct kref refs; | |
7b24d861 | 63 | spinlock_t lock; |
9119a41e | 64 | struct list_head regions; |
5e911373 MK |
65 | long adds_in_progress; |
66 | struct list_head region_cache; | |
67 | long region_cache_count; | |
e9fe92ae MA |
68 | #ifdef CONFIG_CGROUP_HUGETLB |
69 | /* | |
70 | * On private mappings, the counter to uncharge reservations is stored | |
71 | * here. If these fields are 0, then either the mapping is shared, or | |
72 | * cgroup accounting is disabled for this resv_map. | |
73 | */ | |
74 | struct page_counter *reservation_counter; | |
75 | unsigned long pages_per_hpage; | |
76 | struct cgroup_subsys_state *css; | |
77 | #endif | |
9119a41e | 78 | }; |
075a61d0 MA |
79 | |
80 | /* | |
81 | * Region tracking -- allows tracking of reservations and instantiated pages | |
82 | * across the pages in a mapping. | |
83 | * | |
84 | * The region data structures are embedded into a resv_map and protected | |
85 | * by a resv_map's lock. The set of regions within the resv_map represent | |
86 | * reservations for huge pages, or huge pages that have already been | |
87 | * instantiated within the map. The from and to elements are huge page | |
06c88398 | 88 | * indices into the associated mapping. from indicates the starting index |
075a61d0 MA |
89 | * of the region. to represents the first index past the end of the region. |
90 | * | |
91 | * For example, a file region structure with from == 0 and to == 4 represents | |
92 | * four huge pages in a mapping. It is important to note that the to element | |
93 | * represents the first element past the end of the region. This is used in | |
94 | * arithmetic as 4(to) - 0(from) = 4 huge pages in the region. | |
95 | * | |
96 | * Interval notation of the form [from, to) will be used to indicate that | |
97 | * the endpoint from is inclusive and to is exclusive. | |
98 | */ | |
99 | struct file_region { | |
100 | struct list_head link; | |
101 | long from; | |
102 | long to; | |
103 | #ifdef CONFIG_CGROUP_HUGETLB | |
104 | /* | |
105 | * On shared mappings, each reserved region appears as a struct | |
106 | * file_region in resv_map. These fields hold the info needed to | |
107 | * uncharge each reservation. | |
108 | */ | |
109 | struct page_counter *reservation_counter; | |
110 | struct cgroup_subsys_state *css; | |
111 | #endif | |
112 | }; | |
113 | ||
9119a41e JK |
114 | extern struct resv_map *resv_map_alloc(void); |
115 | void resv_map_release(struct kref *ref); | |
116 | ||
c3f38a38 AK |
117 | extern spinlock_t hugetlb_lock; |
118 | extern int hugetlb_max_hstate __read_mostly; | |
119 | #define for_each_hstate(h) \ | |
120 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
121 | ||
7ca02d0a MK |
122 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
123 | long min_hpages); | |
90481622 DG |
124 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
125 | ||
a1e78772 | 126 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
32927393 CH |
127 | int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); |
128 | int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, | |
129 | loff_t *); | |
130 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, | |
131 | loff_t *); | |
132 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, | |
133 | loff_t *); | |
06808b08 | 134 | |
1da177e4 | 135 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
136 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
137 | struct page **, struct vm_area_struct **, | |
87ffc118 AA |
138 | unsigned long *, unsigned long *, long, unsigned int, |
139 | int *); | |
04f2cbe3 | 140 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 141 | unsigned long, unsigned long, struct page *); |
d833352a MG |
142 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
143 | struct vm_area_struct *vma, | |
144 | unsigned long start, unsigned long end, | |
145 | struct page *ref_page); | |
24669e58 AK |
146 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
147 | unsigned long start, unsigned long end, | |
148 | struct page *ref_page); | |
e1759c21 | 149 | void hugetlb_report_meminfo(struct seq_file *); |
7981593b | 150 | int hugetlb_report_node_meminfo(char *buf, int len, int nid); |
949f7ec5 | 151 | void hugetlb_show_meminfo(void); |
1da177e4 | 152 | unsigned long hugetlb_total_pages(void); |
2b740303 | 153 | vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 154 | unsigned long address, unsigned int flags); |
714c1891 | 155 | #ifdef CONFIG_USERFAULTFD |
8fb5debc MK |
156 | int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, |
157 | struct vm_area_struct *dst_vma, | |
158 | unsigned long dst_addr, | |
159 | unsigned long src_addr, | |
f6191471 | 160 | enum mcopy_atomic_mode mode, |
8fb5debc | 161 | struct page **pagep); |
714c1891 | 162 | #endif /* CONFIG_USERFAULTFD */ |
33b8f84a | 163 | bool hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 164 | struct vm_area_struct *vma, |
ca16d140 | 165 | vm_flags_t vm_flags); |
b5cec28d MK |
166 | long hugetlb_unreserve_pages(struct inode *inode, long start, long end, |
167 | long freed); | |
31caf665 | 168 | bool isolate_huge_page(struct page *page, struct list_head *list); |
25182f05 | 169 | int get_hwpoison_huge_page(struct page *page, bool *hugetlb); |
31caf665 | 170 | void putback_active_hugepage(struct page *page); |
ab5ac90a | 171 | void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason); |
8f1d26d0 | 172 | void free_huge_page(struct page *page); |
72e2936c | 173 | void hugetlb_fix_reserve_counts(struct inode *inode); |
c672c7f2 | 174 | extern struct mutex *hugetlb_fault_mutex_table; |
188b04a7 | 175 | u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx); |
1da177e4 | 176 | |
aec44e0f PX |
177 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma, |
178 | unsigned long addr, pud_t *pud); | |
3212b535 | 179 | |
c0d0381a MK |
180 | struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage); |
181 | ||
1da177e4 | 182 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 183 | extern struct list_head huge_boot_pages; |
1da177e4 | 184 | |
63551ae0 DG |
185 | /* arch callbacks */ |
186 | ||
aec44e0f | 187 | pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, |
a5516438 | 188 | unsigned long addr, unsigned long sz); |
7868a208 PA |
189 | pte_t *huge_pte_offset(struct mm_struct *mm, |
190 | unsigned long addr, unsigned long sz); | |
34ae204f MK |
191 | int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, |
192 | unsigned long *addr, pte_t *ptep); | |
017b1660 MK |
193 | void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma, |
194 | unsigned long *start, unsigned long *end); | |
63551ae0 DG |
195 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
196 | int write); | |
4dc71451 AK |
197 | struct page *follow_huge_pd(struct vm_area_struct *vma, |
198 | unsigned long address, hugepd_t hpd, | |
199 | int flags, int pdshift); | |
63551ae0 | 200 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
e66f17ff | 201 | pmd_t *pmd, int flags); |
ceb86879 | 202 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 203 | pud_t *pud, int flags); |
faaa5b62 AK |
204 | struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, |
205 | pgd_t *pgd, int flags); | |
206 | ||
63551ae0 | 207 | int pmd_huge(pmd_t pmd); |
c2febafc | 208 | int pud_huge(pud_t pud); |
7da4d641 | 209 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 210 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 211 | |
d5ed7444 | 212 | bool is_hugetlb_entry_migration(pte_t pte); |
6dfeaff9 | 213 | void hugetlb_unshare_all_pmds(struct vm_area_struct *vma); |
ab5ac90a | 214 | |
1da177e4 LT |
215 | #else /* !CONFIG_HUGETLB_PAGE */ |
216 | ||
a1e78772 MG |
217 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
218 | { | |
219 | } | |
220 | ||
1da177e4 LT |
221 | static inline unsigned long hugetlb_total_pages(void) |
222 | { | |
223 | return 0; | |
224 | } | |
225 | ||
c0d0381a MK |
226 | static inline struct address_space *hugetlb_page_mapping_lock_write( |
227 | struct page *hpage) | |
228 | { | |
229 | return NULL; | |
230 | } | |
231 | ||
34ae204f MK |
232 | static inline int huge_pmd_unshare(struct mm_struct *mm, |
233 | struct vm_area_struct *vma, | |
234 | unsigned long *addr, pte_t *ptep) | |
017b1660 MK |
235 | { |
236 | return 0; | |
237 | } | |
238 | ||
239 | static inline void adjust_range_if_pmd_sharing_possible( | |
240 | struct vm_area_struct *vma, | |
241 | unsigned long *start, unsigned long *end) | |
242 | { | |
243 | } | |
244 | ||
1f9dccb2 MK |
245 | static inline long follow_hugetlb_page(struct mm_struct *mm, |
246 | struct vm_area_struct *vma, struct page **pages, | |
247 | struct vm_area_struct **vmas, unsigned long *position, | |
248 | unsigned long *nr_pages, long i, unsigned int flags, | |
249 | int *nonblocking) | |
250 | { | |
251 | BUG(); | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static inline struct page *follow_huge_addr(struct mm_struct *mm, | |
256 | unsigned long address, int write) | |
257 | { | |
258 | return ERR_PTR(-EINVAL); | |
259 | } | |
260 | ||
261 | static inline int copy_hugetlb_page_range(struct mm_struct *dst, | |
262 | struct mm_struct *src, struct vm_area_struct *vma) | |
263 | { | |
264 | BUG(); | |
265 | return 0; | |
266 | } | |
267 | ||
e1759c21 AD |
268 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
269 | { | |
270 | } | |
1f9dccb2 | 271 | |
7981593b | 272 | static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid) |
1f9dccb2 MK |
273 | { |
274 | return 0; | |
275 | } | |
276 | ||
949f7ec5 DR |
277 | static inline void hugetlb_show_meminfo(void) |
278 | { | |
279 | } | |
1f9dccb2 MK |
280 | |
281 | static inline struct page *follow_huge_pd(struct vm_area_struct *vma, | |
282 | unsigned long address, hugepd_t hpd, int flags, | |
283 | int pdshift) | |
284 | { | |
285 | return NULL; | |
286 | } | |
287 | ||
288 | static inline struct page *follow_huge_pmd(struct mm_struct *mm, | |
289 | unsigned long address, pmd_t *pmd, int flags) | |
290 | { | |
291 | return NULL; | |
292 | } | |
293 | ||
294 | static inline struct page *follow_huge_pud(struct mm_struct *mm, | |
295 | unsigned long address, pud_t *pud, int flags) | |
296 | { | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | static inline struct page *follow_huge_pgd(struct mm_struct *mm, | |
301 | unsigned long address, pgd_t *pgd, int flags) | |
302 | { | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | static inline int prepare_hugepage_range(struct file *file, | |
307 | unsigned long addr, unsigned long len) | |
308 | { | |
309 | return -EINVAL; | |
310 | } | |
311 | ||
312 | static inline int pmd_huge(pmd_t pmd) | |
313 | { | |
314 | return 0; | |
315 | } | |
316 | ||
317 | static inline int pud_huge(pud_t pud) | |
318 | { | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
323 | unsigned long addr, unsigned long len) | |
324 | { | |
325 | return 0; | |
326 | } | |
327 | ||
328 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, | |
329 | unsigned long addr, unsigned long end, | |
330 | unsigned long floor, unsigned long ceiling) | |
331 | { | |
332 | BUG(); | |
333 | } | |
334 | ||
714c1891 | 335 | #ifdef CONFIG_USERFAULTFD |
1f9dccb2 MK |
336 | static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, |
337 | pte_t *dst_pte, | |
338 | struct vm_area_struct *dst_vma, | |
339 | unsigned long dst_addr, | |
340 | unsigned long src_addr, | |
f6191471 | 341 | enum mcopy_atomic_mode mode, |
1f9dccb2 MK |
342 | struct page **pagep) |
343 | { | |
344 | BUG(); | |
345 | return 0; | |
346 | } | |
714c1891 | 347 | #endif /* CONFIG_USERFAULTFD */ |
1f9dccb2 MK |
348 | |
349 | static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, | |
350 | unsigned long sz) | |
351 | { | |
352 | return NULL; | |
353 | } | |
24669e58 | 354 | |
f40386a4 NH |
355 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
356 | { | |
357 | return false; | |
358 | } | |
1da177e4 | 359 | |
25182f05 NH |
360 | static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb) |
361 | { | |
362 | return 0; | |
363 | } | |
364 | ||
1f9dccb2 MK |
365 | static inline void putback_active_hugepage(struct page *page) |
366 | { | |
367 | } | |
368 | ||
369 | static inline void move_hugetlb_state(struct page *oldpage, | |
370 | struct page *newpage, int reason) | |
371 | { | |
372 | } | |
373 | ||
374 | static inline unsigned long hugetlb_change_protection( | |
375 | struct vm_area_struct *vma, unsigned long address, | |
376 | unsigned long end, pgprot_t newprot) | |
7da4d641 PZ |
377 | { |
378 | return 0; | |
379 | } | |
8f860591 | 380 | |
d833352a MG |
381 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
382 | struct vm_area_struct *vma, unsigned long start, | |
383 | unsigned long end, struct page *ref_page) | |
384 | { | |
385 | BUG(); | |
386 | } | |
387 | ||
24669e58 AK |
388 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
389 | struct vm_area_struct *vma, unsigned long start, | |
390 | unsigned long end, struct page *ref_page) | |
391 | { | |
392 | BUG(); | |
393 | } | |
1f9dccb2 | 394 | |
a953e772 | 395 | static inline vm_fault_t hugetlb_fault(struct mm_struct *mm, |
1f9dccb2 MK |
396 | struct vm_area_struct *vma, unsigned long address, |
397 | unsigned int flags) | |
a953e772 SJ |
398 | { |
399 | BUG(); | |
400 | return 0; | |
401 | } | |
24669e58 | 402 | |
6dfeaff9 PX |
403 | static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { } |
404 | ||
1da177e4 | 405 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
406 | /* |
407 | * hugepages at page global directory. If arch support | |
408 | * hugepages at pgd level, they need to define this. | |
409 | */ | |
410 | #ifndef pgd_huge | |
411 | #define pgd_huge(x) 0 | |
412 | #endif | |
c2febafc KS |
413 | #ifndef p4d_huge |
414 | #define p4d_huge(x) 0 | |
415 | #endif | |
f30c59e9 AK |
416 | |
417 | #ifndef pgd_write | |
418 | static inline int pgd_write(pgd_t pgd) | |
419 | { | |
420 | BUG(); | |
421 | return 0; | |
422 | } | |
423 | #endif | |
424 | ||
4e52780d EM |
425 | #define HUGETLB_ANON_FILE "anon_hugepage" |
426 | ||
6bfde05b EM |
427 | enum { |
428 | /* | |
429 | * The file will be used as an shm file so shmfs accounting rules | |
430 | * apply | |
431 | */ | |
432 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
433 | /* |
434 | * The file is being created on the internal vfs mount and shmfs | |
435 | * accounting rules do not apply | |
436 | */ | |
437 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
438 | }; |
439 | ||
1da177e4 | 440 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 441 | struct hugetlbfs_sb_info { |
1da177e4 LT |
442 | long max_inodes; /* inodes allowed */ |
443 | long free_inodes; /* inodes free */ | |
444 | spinlock_t stat_lock; | |
a137e1cc | 445 | struct hstate *hstate; |
90481622 | 446 | struct hugepage_subpool *spool; |
4a25220d DH |
447 | kuid_t uid; |
448 | kgid_t gid; | |
449 | umode_t mode; | |
1da177e4 LT |
450 | }; |
451 | ||
1da177e4 LT |
452 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
453 | { | |
454 | return sb->s_fs_info; | |
455 | } | |
456 | ||
da14c1e5 MAL |
457 | struct hugetlbfs_inode_info { |
458 | struct shared_policy policy; | |
459 | struct inode vfs_inode; | |
ff62a342 | 460 | unsigned int seals; |
da14c1e5 MAL |
461 | }; |
462 | ||
463 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
464 | { | |
465 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
466 | } | |
467 | ||
4b6f5d20 | 468 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 469 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 470 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
d7c9e99a | 471 | struct ucounts **ucounts, int creat_flags, |
42d7395f | 472 | int page_size_log); |
1da177e4 | 473 | |
719ff321 | 474 | static inline bool is_file_hugepages(struct file *file) |
1da177e4 | 475 | { |
516dffdc | 476 | if (file->f_op == &hugetlbfs_file_operations) |
719ff321 | 477 | return true; |
516dffdc | 478 | |
719ff321 | 479 | return is_file_shm_hugepages(file); |
1da177e4 LT |
480 | } |
481 | ||
bb297bb2 CL |
482 | static inline struct hstate *hstate_inode(struct inode *i) |
483 | { | |
484 | return HUGETLBFS_SB(i->i_sb)->hstate; | |
485 | } | |
1da177e4 LT |
486 | #else /* !CONFIG_HUGETLBFS */ |
487 | ||
719ff321 | 488 | #define is_file_hugepages(file) false |
40716e29 | 489 | static inline struct file * |
af73e4d9 | 490 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
d7c9e99a | 491 | struct ucounts **ucounts, int creat_flags, |
42d7395f | 492 | int page_size_log) |
e9ea0e2d AM |
493 | { |
494 | return ERR_PTR(-ENOSYS); | |
495 | } | |
1da177e4 | 496 | |
bb297bb2 CL |
497 | static inline struct hstate *hstate_inode(struct inode *i) |
498 | { | |
499 | return NULL; | |
500 | } | |
1da177e4 LT |
501 | #endif /* !CONFIG_HUGETLBFS */ |
502 | ||
d2ba27e8 AB |
503 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
504 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
505 | unsigned long len, unsigned long pgoff, | |
506 | unsigned long flags); | |
507 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
508 | ||
d6995da3 MK |
509 | /* |
510 | * huegtlb page specific state flags. These flags are located in page.private | |
511 | * of the hugetlb head page. Functions created via the below macros should be | |
512 | * used to manipulate these flags. | |
513 | * | |
514 | * HPG_restore_reserve - Set when a hugetlb page consumes a reservation at | |
515 | * allocation time. Cleared when page is fully instantiated. Free | |
516 | * routine checks flag to restore a reservation on error paths. | |
d95c0337 MK |
517 | * Synchronization: Examined or modified by code that knows it has |
518 | * the only reference to page. i.e. After allocation but before use | |
519 | * or when the page is being freed. | |
8f251a3d MK |
520 | * HPG_migratable - Set after a newly allocated page is added to the page |
521 | * cache and/or page tables. Indicates the page is a candidate for | |
522 | * migration. | |
d95c0337 MK |
523 | * Synchronization: Initially set after new page allocation with no |
524 | * locking. When examined and modified during migration processing | |
525 | * (isolate, migrate, putback) the hugetlb_lock is held. | |
9157c311 MK |
526 | * HPG_temporary - - Set on a page that is temporarily allocated from the buddy |
527 | * allocator. Typically used for migration target pages when no pages | |
528 | * are available in the pool. The hugetlb free page path will | |
529 | * immediately free pages with this flag set to the buddy allocator. | |
d95c0337 MK |
530 | * Synchronization: Can be set after huge page allocation from buddy when |
531 | * code knows it has only reference. All other examinations and | |
532 | * modifications require hugetlb_lock. | |
6c037149 | 533 | * HPG_freed - Set when page is on the free lists. |
d95c0337 | 534 | * Synchronization: hugetlb_lock held for examination and modification. |
ad2fa371 | 535 | * HPG_vmemmap_optimized - Set when the vmemmap pages of the page are freed. |
d6995da3 MK |
536 | */ |
537 | enum hugetlb_page_flags { | |
538 | HPG_restore_reserve = 0, | |
8f251a3d | 539 | HPG_migratable, |
9157c311 | 540 | HPG_temporary, |
6c037149 | 541 | HPG_freed, |
ad2fa371 | 542 | HPG_vmemmap_optimized, |
d6995da3 MK |
543 | __NR_HPAGEFLAGS, |
544 | }; | |
545 | ||
546 | /* | |
547 | * Macros to create test, set and clear function definitions for | |
548 | * hugetlb specific page flags. | |
549 | */ | |
550 | #ifdef CONFIG_HUGETLB_PAGE | |
551 | #define TESTHPAGEFLAG(uname, flname) \ | |
552 | static inline int HPage##uname(struct page *page) \ | |
553 | { return test_bit(HPG_##flname, &(page->private)); } | |
554 | ||
555 | #define SETHPAGEFLAG(uname, flname) \ | |
556 | static inline void SetHPage##uname(struct page *page) \ | |
557 | { set_bit(HPG_##flname, &(page->private)); } | |
558 | ||
559 | #define CLEARHPAGEFLAG(uname, flname) \ | |
560 | static inline void ClearHPage##uname(struct page *page) \ | |
561 | { clear_bit(HPG_##flname, &(page->private)); } | |
562 | #else | |
563 | #define TESTHPAGEFLAG(uname, flname) \ | |
564 | static inline int HPage##uname(struct page *page) \ | |
565 | { return 0; } | |
566 | ||
567 | #define SETHPAGEFLAG(uname, flname) \ | |
568 | static inline void SetHPage##uname(struct page *page) \ | |
569 | { } | |
570 | ||
571 | #define CLEARHPAGEFLAG(uname, flname) \ | |
572 | static inline void ClearHPage##uname(struct page *page) \ | |
573 | { } | |
574 | #endif | |
575 | ||
576 | #define HPAGEFLAG(uname, flname) \ | |
577 | TESTHPAGEFLAG(uname, flname) \ | |
578 | SETHPAGEFLAG(uname, flname) \ | |
579 | CLEARHPAGEFLAG(uname, flname) \ | |
580 | ||
581 | /* | |
582 | * Create functions associated with hugetlb page flags | |
583 | */ | |
584 | HPAGEFLAG(RestoreReserve, restore_reserve) | |
8f251a3d | 585 | HPAGEFLAG(Migratable, migratable) |
9157c311 | 586 | HPAGEFLAG(Temporary, temporary) |
6c037149 | 587 | HPAGEFLAG(Freed, freed) |
ad2fa371 | 588 | HPAGEFLAG(VmemmapOptimized, vmemmap_optimized) |
d6995da3 | 589 | |
a5516438 AK |
590 | #ifdef CONFIG_HUGETLB_PAGE |
591 | ||
a3437870 | 592 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
593 | /* Defines one hugetlb page size */ |
594 | struct hstate { | |
29383967 | 595 | struct mutex resize_lock; |
e8c5c824 LS |
596 | int next_nid_to_alloc; |
597 | int next_nid_to_free; | |
a5516438 AK |
598 | unsigned int order; |
599 | unsigned long mask; | |
600 | unsigned long max_huge_pages; | |
601 | unsigned long nr_huge_pages; | |
602 | unsigned long free_huge_pages; | |
603 | unsigned long resv_huge_pages; | |
604 | unsigned long surplus_huge_pages; | |
605 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 606 | struct list_head hugepage_activelist; |
a5516438 AK |
607 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
608 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
609 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
610 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
77490587 MS |
611 | #ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP |
612 | unsigned int nr_free_vmemmap_pages; | |
613 | #endif | |
abb8206c AK |
614 | #ifdef CONFIG_CGROUP_HUGETLB |
615 | /* cgroup control files */ | |
cdc2fcfe MA |
616 | struct cftype cgroup_files_dfl[7]; |
617 | struct cftype cgroup_files_legacy[9]; | |
abb8206c | 618 | #endif |
a3437870 | 619 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
620 | }; |
621 | ||
53ba51d2 JT |
622 | struct huge_bootmem_page { |
623 | struct list_head list; | |
624 | struct hstate *hstate; | |
625 | }; | |
626 | ||
ae37c7ff | 627 | int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list); |
70c3547e MK |
628 | struct page *alloc_huge_page(struct vm_area_struct *vma, |
629 | unsigned long addr, int avoid_reserve); | |
3e59fcb0 | 630 | struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
d92bbc27 | 631 | nodemask_t *nmask, gfp_t gfp_mask); |
389c8178 MH |
632 | struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, |
633 | unsigned long address); | |
ab76ad54 MK |
634 | int huge_add_to_page_cache(struct page *page, struct address_space *mapping, |
635 | pgoff_t idx); | |
846be085 MK |
636 | void restore_reserve_on_error(struct hstate *h, struct vm_area_struct *vma, |
637 | unsigned long address, struct page *page); | |
bf50bab2 | 638 | |
53ba51d2 | 639 | /* arch callback */ |
e24a1307 | 640 | int __init __alloc_bootmem_huge_page(struct hstate *h); |
53ba51d2 JT |
641 | int __init alloc_bootmem_huge_page(struct hstate *h); |
642 | ||
e5ff2159 | 643 | void __init hugetlb_add_hstate(unsigned order); |
ae94da89 | 644 | bool __init arch_hugetlb_valid_size(unsigned long size); |
e5ff2159 AK |
645 | struct hstate *size_to_hstate(unsigned long size); |
646 | ||
647 | #ifndef HUGE_MAX_HSTATE | |
648 | #define HUGE_MAX_HSTATE 1 | |
649 | #endif | |
650 | ||
651 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
652 | extern unsigned int default_hstate_idx; | |
653 | ||
654 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 655 | |
d6995da3 MK |
656 | /* |
657 | * hugetlb page subpool pointer located in hpage[1].private | |
658 | */ | |
659 | static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) | |
660 | { | |
cd39d4e9 | 661 | return (void *)page_private(hpage + SUBPAGE_INDEX_SUBPOOL); |
d6995da3 MK |
662 | } |
663 | ||
664 | static inline void hugetlb_set_page_subpool(struct page *hpage, | |
665 | struct hugepage_subpool *subpool) | |
666 | { | |
cd39d4e9 | 667 | set_page_private(hpage + SUBPAGE_INDEX_SUBPOOL, (unsigned long)subpool); |
d6995da3 MK |
668 | } |
669 | ||
a5516438 AK |
670 | static inline struct hstate *hstate_file(struct file *f) |
671 | { | |
496ad9aa | 672 | return hstate_inode(file_inode(f)); |
a5516438 AK |
673 | } |
674 | ||
af73e4d9 NH |
675 | static inline struct hstate *hstate_sizelog(int page_size_log) |
676 | { | |
677 | if (!page_size_log) | |
678 | return &default_hstate; | |
97ad2be1 SL |
679 | |
680 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
681 | } |
682 | ||
a137e1cc | 683 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 684 | { |
a137e1cc | 685 | return hstate_file(vma->vm_file); |
a5516438 AK |
686 | } |
687 | ||
688 | static inline unsigned long huge_page_size(struct hstate *h) | |
689 | { | |
690 | return (unsigned long)PAGE_SIZE << h->order; | |
691 | } | |
692 | ||
08fba699 MG |
693 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
694 | ||
3340289d MG |
695 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
696 | ||
a5516438 AK |
697 | static inline unsigned long huge_page_mask(struct hstate *h) |
698 | { | |
699 | return h->mask; | |
700 | } | |
701 | ||
702 | static inline unsigned int huge_page_order(struct hstate *h) | |
703 | { | |
704 | return h->order; | |
705 | } | |
706 | ||
707 | static inline unsigned huge_page_shift(struct hstate *h) | |
708 | { | |
709 | return h->order + PAGE_SHIFT; | |
710 | } | |
711 | ||
bae7f4ae LC |
712 | static inline bool hstate_is_gigantic(struct hstate *h) |
713 | { | |
714 | return huge_page_order(h) >= MAX_ORDER; | |
715 | } | |
716 | ||
a5516438 AK |
717 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
718 | { | |
719 | return 1 << h->order; | |
720 | } | |
721 | ||
722 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
723 | { | |
724 | return huge_page_size(h) / 512; | |
725 | } | |
726 | ||
727 | #include <asm/hugetlb.h> | |
728 | ||
b0eae98c AK |
729 | #ifndef is_hugepage_only_range |
730 | static inline int is_hugepage_only_range(struct mm_struct *mm, | |
731 | unsigned long addr, unsigned long len) | |
732 | { | |
733 | return 0; | |
734 | } | |
735 | #define is_hugepage_only_range is_hugepage_only_range | |
736 | #endif | |
737 | ||
5be99343 AK |
738 | #ifndef arch_clear_hugepage_flags |
739 | static inline void arch_clear_hugepage_flags(struct page *page) { } | |
740 | #define arch_clear_hugepage_flags arch_clear_hugepage_flags | |
741 | #endif | |
742 | ||
d9ed9faa | 743 | #ifndef arch_make_huge_pte |
79c1c594 CL |
744 | static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, |
745 | vm_flags_t flags) | |
d9ed9faa CM |
746 | { |
747 | return entry; | |
748 | } | |
749 | #endif | |
750 | ||
e5ff2159 AK |
751 | static inline struct hstate *page_hstate(struct page *page) |
752 | { | |
309381fe | 753 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
a50b854e | 754 | return size_to_hstate(page_size(page)); |
e5ff2159 AK |
755 | } |
756 | ||
aa50d3a7 AK |
757 | static inline unsigned hstate_index_to_shift(unsigned index) |
758 | { | |
759 | return hstates[index].order + PAGE_SHIFT; | |
760 | } | |
761 | ||
972dc4de AK |
762 | static inline int hstate_index(struct hstate *h) |
763 | { | |
764 | return h - hstates; | |
765 | } | |
766 | ||
c3114a84 | 767 | extern int dissolve_free_huge_page(struct page *page); |
082d5b6b GS |
768 | extern int dissolve_free_huge_pages(unsigned long start_pfn, |
769 | unsigned long end_pfn); | |
e693de18 | 770 | |
c177c81e | 771 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
e693de18 AK |
772 | #ifndef arch_hugetlb_migration_supported |
773 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) | |
774 | { | |
94310cbc | 775 | if ((huge_page_shift(h) == PMD_SHIFT) || |
9b553bf5 AK |
776 | (huge_page_shift(h) == PUD_SHIFT) || |
777 | (huge_page_shift(h) == PGDIR_SHIFT)) | |
94310cbc AK |
778 | return true; |
779 | else | |
780 | return false; | |
e693de18 AK |
781 | } |
782 | #endif | |
c177c81e | 783 | #else |
e693de18 AK |
784 | static inline bool arch_hugetlb_migration_supported(struct hstate *h) |
785 | { | |
d70c17d4 | 786 | return false; |
e693de18 | 787 | } |
c177c81e | 788 | #endif |
e693de18 AK |
789 | |
790 | static inline bool hugepage_migration_supported(struct hstate *h) | |
791 | { | |
792 | return arch_hugetlb_migration_supported(h); | |
83467efb | 793 | } |
c8721bbb | 794 | |
7ed2c31d AK |
795 | /* |
796 | * Movability check is different as compared to migration check. | |
797 | * It determines whether or not a huge page should be placed on | |
798 | * movable zone or not. Movability of any huge page should be | |
799 | * required only if huge page size is supported for migration. | |
06c88398 | 800 | * There won't be any reason for the huge page to be movable if |
7ed2c31d AK |
801 | * it is not migratable to start with. Also the size of the huge |
802 | * page should be large enough to be placed under a movable zone | |
803 | * and still feasible enough to be migratable. Just the presence | |
804 | * in movable zone does not make the migration feasible. | |
805 | * | |
806 | * So even though large huge page sizes like the gigantic ones | |
807 | * are migratable they should not be movable because its not | |
808 | * feasible to migrate them from movable zone. | |
809 | */ | |
810 | static inline bool hugepage_movable_supported(struct hstate *h) | |
811 | { | |
812 | if (!hugepage_migration_supported(h)) | |
813 | return false; | |
814 | ||
815 | if (hstate_is_gigantic(h)) | |
816 | return false; | |
817 | return true; | |
818 | } | |
819 | ||
d92bbc27 JK |
820 | /* Movability of hugepages depends on migration support. */ |
821 | static inline gfp_t htlb_alloc_mask(struct hstate *h) | |
822 | { | |
823 | if (hugepage_movable_supported(h)) | |
824 | return GFP_HIGHUSER_MOVABLE; | |
825 | else | |
826 | return GFP_HIGHUSER; | |
827 | } | |
828 | ||
19fc7bed JK |
829 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
830 | { | |
831 | gfp_t modified_mask = htlb_alloc_mask(h); | |
832 | ||
833 | /* Some callers might want to enforce node */ | |
834 | modified_mask |= (gfp_mask & __GFP_THISNODE); | |
835 | ||
41b4dc14 JK |
836 | modified_mask |= (gfp_mask & __GFP_NOWARN); |
837 | ||
19fc7bed JK |
838 | return modified_mask; |
839 | } | |
840 | ||
cb900f41 KS |
841 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
842 | struct mm_struct *mm, pte_t *pte) | |
843 | { | |
844 | if (huge_page_size(h) == PMD_SIZE) | |
845 | return pmd_lockptr(mm, (pmd_t *) pte); | |
846 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
847 | return &mm->page_table_lock; | |
848 | } | |
849 | ||
2531c8cf DD |
850 | #ifndef hugepages_supported |
851 | /* | |
852 | * Some platform decide whether they support huge pages at boot | |
853 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
854 | * when there is no such support | |
855 | */ | |
856 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
857 | #endif | |
457c1b27 | 858 | |
5d317b2b NH |
859 | void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); |
860 | ||
13db8c50 LZ |
861 | static inline void hugetlb_count_init(struct mm_struct *mm) |
862 | { | |
863 | atomic_long_set(&mm->hugetlb_usage, 0); | |
864 | } | |
865 | ||
5d317b2b NH |
866 | static inline void hugetlb_count_add(long l, struct mm_struct *mm) |
867 | { | |
868 | atomic_long_add(l, &mm->hugetlb_usage); | |
869 | } | |
870 | ||
871 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
872 | { | |
873 | atomic_long_sub(l, &mm->hugetlb_usage); | |
874 | } | |
e5251fd4 PA |
875 | |
876 | #ifndef set_huge_swap_pte_at | |
877 | static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, | |
878 | pte_t *ptep, pte_t pte, unsigned long sz) | |
879 | { | |
880 | set_huge_pte_at(mm, addr, ptep, pte); | |
881 | } | |
882 | #endif | |
023bdd00 AK |
883 | |
884 | #ifndef huge_ptep_modify_prot_start | |
885 | #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start | |
886 | static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, | |
887 | unsigned long addr, pte_t *ptep) | |
888 | { | |
889 | return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); | |
890 | } | |
891 | #endif | |
892 | ||
893 | #ifndef huge_ptep_modify_prot_commit | |
894 | #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit | |
895 | static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, | |
896 | unsigned long addr, pte_t *ptep, | |
897 | pte_t old_pte, pte_t pte) | |
898 | { | |
899 | set_huge_pte_at(vma->vm_mm, addr, ptep, pte); | |
900 | } | |
901 | #endif | |
902 | ||
af73e4d9 | 903 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 904 | struct hstate {}; |
442a5a9a | 905 | |
6acfb5ba MS |
906 | static inline struct hugepage_subpool *hugetlb_page_subpool(struct page *hpage) |
907 | { | |
908 | return NULL; | |
909 | } | |
910 | ||
ae37c7ff OS |
911 | static inline int isolate_or_dissolve_huge_page(struct page *page, |
912 | struct list_head *list) | |
369fa227 OS |
913 | { |
914 | return -ENOMEM; | |
915 | } | |
916 | ||
442a5a9a JG |
917 | static inline struct page *alloc_huge_page(struct vm_area_struct *vma, |
918 | unsigned long addr, | |
919 | int avoid_reserve) | |
920 | { | |
921 | return NULL; | |
922 | } | |
923 | ||
442a5a9a | 924 | static inline struct page * |
d92bbc27 JK |
925 | alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, |
926 | nodemask_t *nmask, gfp_t gfp_mask) | |
442a5a9a JG |
927 | { |
928 | return NULL; | |
929 | } | |
930 | ||
931 | static inline struct page *alloc_huge_page_vma(struct hstate *h, | |
932 | struct vm_area_struct *vma, | |
933 | unsigned long address) | |
934 | { | |
935 | return NULL; | |
936 | } | |
937 | ||
938 | static inline int __alloc_bootmem_huge_page(struct hstate *h) | |
939 | { | |
940 | return 0; | |
941 | } | |
942 | ||
943 | static inline struct hstate *hstate_file(struct file *f) | |
944 | { | |
945 | return NULL; | |
946 | } | |
947 | ||
948 | static inline struct hstate *hstate_sizelog(int page_size_log) | |
949 | { | |
950 | return NULL; | |
951 | } | |
952 | ||
953 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) | |
954 | { | |
955 | return NULL; | |
442a5a9a JG |
956 | } |
957 | ||
958 | static inline struct hstate *page_hstate(struct page *page) | |
959 | { | |
960 | return NULL; | |
961 | } | |
962 | ||
963 | static inline unsigned long huge_page_size(struct hstate *h) | |
964 | { | |
965 | return PAGE_SIZE; | |
966 | } | |
967 | ||
968 | static inline unsigned long huge_page_mask(struct hstate *h) | |
969 | { | |
970 | return PAGE_MASK; | |
971 | } | |
972 | ||
973 | static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) | |
974 | { | |
975 | return PAGE_SIZE; | |
976 | } | |
977 | ||
978 | static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) | |
979 | { | |
980 | return PAGE_SIZE; | |
981 | } | |
982 | ||
983 | static inline unsigned int huge_page_order(struct hstate *h) | |
984 | { | |
985 | return 0; | |
986 | } | |
987 | ||
988 | static inline unsigned int huge_page_shift(struct hstate *h) | |
989 | { | |
990 | return PAGE_SHIFT; | |
991 | } | |
992 | ||
94310cbc AK |
993 | static inline bool hstate_is_gigantic(struct hstate *h) |
994 | { | |
995 | return false; | |
996 | } | |
997 | ||
510a35d4 AR |
998 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
999 | { | |
1000 | return 1; | |
1001 | } | |
c3114a84 AK |
1002 | |
1003 | static inline unsigned hstate_index_to_shift(unsigned index) | |
1004 | { | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static inline int hstate_index(struct hstate *h) | |
1009 | { | |
1010 | return 0; | |
1011 | } | |
13d60f4b | 1012 | |
c3114a84 AK |
1013 | static inline int dissolve_free_huge_page(struct page *page) |
1014 | { | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | static inline int dissolve_free_huge_pages(unsigned long start_pfn, | |
1019 | unsigned long end_pfn) | |
1020 | { | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static inline bool hugepage_migration_supported(struct hstate *h) | |
1025 | { | |
1026 | return false; | |
1027 | } | |
cb900f41 | 1028 | |
7ed2c31d AK |
1029 | static inline bool hugepage_movable_supported(struct hstate *h) |
1030 | { | |
1031 | return false; | |
1032 | } | |
1033 | ||
d92bbc27 JK |
1034 | static inline gfp_t htlb_alloc_mask(struct hstate *h) |
1035 | { | |
1036 | return 0; | |
1037 | } | |
1038 | ||
19fc7bed JK |
1039 | static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) |
1040 | { | |
1041 | return 0; | |
1042 | } | |
1043 | ||
cb900f41 KS |
1044 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
1045 | struct mm_struct *mm, pte_t *pte) | |
1046 | { | |
1047 | return &mm->page_table_lock; | |
1048 | } | |
5d317b2b | 1049 | |
13db8c50 LZ |
1050 | static inline void hugetlb_count_init(struct mm_struct *mm) |
1051 | { | |
1052 | } | |
1053 | ||
5d317b2b NH |
1054 | static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m) |
1055 | { | |
1056 | } | |
1057 | ||
1058 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
1059 | { | |
1060 | } | |
e5251fd4 PA |
1061 | |
1062 | static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, | |
1063 | pte_t *ptep, pte_t pte, unsigned long sz) | |
1064 | { | |
1065 | } | |
af73e4d9 | 1066 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 1067 | |
2d7a2171 MS |
1068 | #ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP |
1069 | extern bool hugetlb_free_vmemmap_enabled; | |
1070 | #else | |
1071 | #define hugetlb_free_vmemmap_enabled false | |
1072 | #endif | |
1073 | ||
cb900f41 KS |
1074 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
1075 | struct mm_struct *mm, pte_t *pte) | |
1076 | { | |
1077 | spinlock_t *ptl; | |
1078 | ||
1079 | ptl = huge_pte_lockptr(h, mm, pte); | |
1080 | spin_lock(ptl); | |
1081 | return ptl; | |
1082 | } | |
1083 | ||
cf11e85f RG |
1084 | #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA) |
1085 | extern void __init hugetlb_cma_reserve(int order); | |
1086 | extern void __init hugetlb_cma_check(void); | |
1087 | #else | |
1088 | static inline __init void hugetlb_cma_reserve(int order) | |
1089 | { | |
1090 | } | |
1091 | static inline __init void hugetlb_cma_check(void) | |
1092 | { | |
1093 | } | |
1094 | #endif | |
1095 | ||
c1991e07 PX |
1096 | bool want_pmd_share(struct vm_area_struct *vma, unsigned long addr); |
1097 | ||
537cf30b PX |
1098 | #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE |
1099 | /* | |
1100 | * ARCHes with special requirements for evicting HUGETLB backing TLB entries can | |
1101 | * implement this. | |
1102 | */ | |
1103 | #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) | |
1104 | #endif | |
1105 | ||
1da177e4 | 1106 | #endif /* _LINUX_HUGETLB_H */ |