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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
be93d8cf | 4 | #include <linux/mm_types.h> |
309381fe | 5 | #include <linux/mmdebug.h> |
4e950f6f | 6 | #include <linux/fs.h> |
8edf344c | 7 | #include <linux/hugetlb_inline.h> |
abb8206c | 8 | #include <linux/cgroup.h> |
9119a41e JK |
9 | #include <linux/list.h> |
10 | #include <linux/kref.h> | |
4e950f6f | 11 | |
e9ea0e2d AM |
12 | struct ctl_table; |
13 | struct user_struct; | |
24669e58 | 14 | struct mmu_gather; |
e9ea0e2d | 15 | |
1da177e4 LT |
16 | #ifdef CONFIG_HUGETLB_PAGE |
17 | ||
18 | #include <linux/mempolicy.h> | |
516dffdc | 19 | #include <linux/shm.h> |
63551ae0 | 20 | #include <asm/tlbflush.h> |
1da177e4 | 21 | |
90481622 DG |
22 | struct hugepage_subpool { |
23 | spinlock_t lock; | |
24 | long count; | |
c6a91820 MK |
25 | long max_hpages; /* Maximum huge pages or -1 if no maximum. */ |
26 | long used_hpages; /* Used count against maximum, includes */ | |
27 | /* both alloced and reserved pages. */ | |
28 | struct hstate *hstate; | |
29 | long min_hpages; /* Minimum huge pages or -1 if no minimum. */ | |
30 | long rsv_hpages; /* Pages reserved against global pool to */ | |
31 | /* sasitfy minimum size. */ | |
90481622 DG |
32 | }; |
33 | ||
9119a41e JK |
34 | struct resv_map { |
35 | struct kref refs; | |
7b24d861 | 36 | spinlock_t lock; |
9119a41e | 37 | struct list_head regions; |
5e911373 MK |
38 | long adds_in_progress; |
39 | struct list_head region_cache; | |
40 | long region_cache_count; | |
9119a41e JK |
41 | }; |
42 | extern struct resv_map *resv_map_alloc(void); | |
43 | void resv_map_release(struct kref *ref); | |
44 | ||
c3f38a38 AK |
45 | extern spinlock_t hugetlb_lock; |
46 | extern int hugetlb_max_hstate __read_mostly; | |
47 | #define for_each_hstate(h) \ | |
48 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
49 | ||
7ca02d0a MK |
50 | struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, |
51 | long min_hpages); | |
90481622 DG |
52 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
53 | ||
a1e78772 | 54 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
55 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
56 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
57 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
58 | |
59 | #ifdef CONFIG_NUMA | |
60 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
61 | void __user *, size_t *, loff_t *); | |
62 | #endif | |
63 | ||
1da177e4 | 64 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
65 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
66 | struct page **, struct vm_area_struct **, | |
67 | unsigned long *, unsigned long *, long, unsigned int); | |
04f2cbe3 | 68 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 69 | unsigned long, unsigned long, struct page *); |
d833352a MG |
70 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
71 | struct vm_area_struct *vma, | |
72 | unsigned long start, unsigned long end, | |
73 | struct page *ref_page); | |
24669e58 AK |
74 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
75 | unsigned long start, unsigned long end, | |
76 | struct page *ref_page); | |
e1759c21 | 77 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 78 | int hugetlb_report_node_meminfo(int, char *); |
949f7ec5 | 79 | void hugetlb_show_meminfo(void); |
1da177e4 | 80 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 81 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 82 | unsigned long address, unsigned int flags); |
a1e78772 | 83 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 84 | struct vm_area_struct *vma, |
ca16d140 | 85 | vm_flags_t vm_flags); |
b5cec28d MK |
86 | long hugetlb_unreserve_pages(struct inode *inode, long start, long end, |
87 | long freed); | |
6de2b1aa | 88 | int dequeue_hwpoisoned_huge_page(struct page *page); |
31caf665 NH |
89 | bool isolate_huge_page(struct page *page, struct list_head *list); |
90 | void putback_active_hugepage(struct page *page); | |
8f1d26d0 | 91 | void free_huge_page(struct page *page); |
b5cec28d | 92 | void hugetlb_fix_reserve_counts(struct inode *inode, bool restore_reserve); |
c672c7f2 MK |
93 | extern struct mutex *hugetlb_fault_mutex_table; |
94 | u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, | |
95 | struct vm_area_struct *vma, | |
96 | struct address_space *mapping, | |
97 | pgoff_t idx, unsigned long address); | |
1da177e4 | 98 | |
3212b535 | 99 | pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); |
3212b535 | 100 | |
753162cd | 101 | extern int hugepages_treat_as_movable; |
1da177e4 | 102 | extern int sysctl_hugetlb_shm_group; |
53ba51d2 | 103 | extern struct list_head huge_boot_pages; |
1da177e4 | 104 | |
63551ae0 DG |
105 | /* arch callbacks */ |
106 | ||
a5516438 AK |
107 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
108 | unsigned long addr, unsigned long sz); | |
63551ae0 | 109 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 110 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
111 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
112 | int write); | |
113 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
e66f17ff | 114 | pmd_t *pmd, int flags); |
ceb86879 | 115 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
e66f17ff | 116 | pud_t *pud, int flags); |
63551ae0 | 117 | int pmd_huge(pmd_t pmd); |
ceb86879 | 118 | int pud_huge(pud_t pmd); |
7da4d641 | 119 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 120 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 121 | |
1da177e4 LT |
122 | #else /* !CONFIG_HUGETLB_PAGE */ |
123 | ||
a1e78772 MG |
124 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
125 | { | |
126 | } | |
127 | ||
1da177e4 LT |
128 | static inline unsigned long hugetlb_total_pages(void) |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
5b23dbe8 | 133 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
134 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
135 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
136 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
137 | { | |
138 | } | |
1da177e4 | 139 | #define hugetlb_report_node_meminfo(n, buf) 0 |
949f7ec5 DR |
140 | static inline void hugetlb_show_meminfo(void) |
141 | { | |
142 | } | |
e66f17ff NH |
143 | #define follow_huge_pmd(mm, addr, pmd, flags) NULL |
144 | #define follow_huge_pud(mm, addr, pud, flags) NULL | |
a5516438 | 145 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 146 | #define pmd_huge(x) 0 |
ceb86879 | 147 | #define pud_huge(x) 0 |
1da177e4 | 148 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 149 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 150 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 151 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
152 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
153 | { | |
154 | return 0; | |
155 | } | |
156 | ||
f40386a4 NH |
157 | static inline bool isolate_huge_page(struct page *page, struct list_head *list) |
158 | { | |
159 | return false; | |
160 | } | |
31caf665 | 161 | #define putback_active_hugepage(p) do {} while (0) |
1da177e4 | 162 | |
7da4d641 PZ |
163 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
164 | unsigned long address, unsigned long end, pgprot_t newprot) | |
165 | { | |
166 | return 0; | |
167 | } | |
8f860591 | 168 | |
d833352a MG |
169 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
170 | struct vm_area_struct *vma, unsigned long start, | |
171 | unsigned long end, struct page *ref_page) | |
172 | { | |
173 | BUG(); | |
174 | } | |
175 | ||
24669e58 AK |
176 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
177 | struct vm_area_struct *vma, unsigned long start, | |
178 | unsigned long end, struct page *ref_page) | |
179 | { | |
180 | BUG(); | |
181 | } | |
182 | ||
1da177e4 | 183 | #endif /* !CONFIG_HUGETLB_PAGE */ |
f30c59e9 AK |
184 | /* |
185 | * hugepages at page global directory. If arch support | |
186 | * hugepages at pgd level, they need to define this. | |
187 | */ | |
188 | #ifndef pgd_huge | |
189 | #define pgd_huge(x) 0 | |
190 | #endif | |
191 | ||
192 | #ifndef pgd_write | |
193 | static inline int pgd_write(pgd_t pgd) | |
194 | { | |
195 | BUG(); | |
196 | return 0; | |
197 | } | |
198 | #endif | |
199 | ||
200 | #ifndef pud_write | |
201 | static inline int pud_write(pud_t pud) | |
202 | { | |
203 | BUG(); | |
204 | return 0; | |
205 | } | |
206 | #endif | |
207 | ||
208 | #ifndef is_hugepd | |
209 | /* | |
210 | * Some architectures requires a hugepage directory format that is | |
211 | * required to support multiple hugepage sizes. For example | |
212 | * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" | |
213 | * introduced the same on powerpc. This allows for a more flexible hugepage | |
214 | * pagetable layout. | |
215 | */ | |
216 | typedef struct { unsigned long pd; } hugepd_t; | |
217 | #define is_hugepd(hugepd) (0) | |
218 | #define __hugepd(x) ((hugepd_t) { (x) }) | |
219 | static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
220 | unsigned pdshift, unsigned long end, | |
221 | int write, struct page **pages, int *nr) | |
222 | { | |
223 | return 0; | |
224 | } | |
225 | #else | |
226 | extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, | |
227 | unsigned pdshift, unsigned long end, | |
228 | int write, struct page **pages, int *nr); | |
229 | #endif | |
1da177e4 | 230 | |
4e52780d EM |
231 | #define HUGETLB_ANON_FILE "anon_hugepage" |
232 | ||
6bfde05b EM |
233 | enum { |
234 | /* | |
235 | * The file will be used as an shm file so shmfs accounting rules | |
236 | * apply | |
237 | */ | |
238 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
239 | /* |
240 | * The file is being created on the internal vfs mount and shmfs | |
241 | * accounting rules do not apply | |
242 | */ | |
243 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
244 | }; |
245 | ||
1da177e4 | 246 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 247 | struct hugetlbfs_sb_info { |
1da177e4 LT |
248 | long max_inodes; /* inodes allowed */ |
249 | long free_inodes; /* inodes free */ | |
250 | spinlock_t stat_lock; | |
a137e1cc | 251 | struct hstate *hstate; |
90481622 | 252 | struct hugepage_subpool *spool; |
1da177e4 LT |
253 | }; |
254 | ||
1da177e4 LT |
255 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
256 | { | |
257 | return sb->s_fs_info; | |
258 | } | |
259 | ||
4b6f5d20 | 260 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 261 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 262 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
263 | struct user_struct **user, int creat_flags, |
264 | int page_size_log); | |
1da177e4 | 265 | |
719ff321 | 266 | static inline bool is_file_hugepages(struct file *file) |
1da177e4 | 267 | { |
516dffdc | 268 | if (file->f_op == &hugetlbfs_file_operations) |
719ff321 | 269 | return true; |
516dffdc | 270 | |
719ff321 | 271 | return is_file_shm_hugepages(file); |
1da177e4 LT |
272 | } |
273 | ||
42d7395f | 274 | |
1da177e4 LT |
275 | #else /* !CONFIG_HUGETLBFS */ |
276 | ||
719ff321 | 277 | #define is_file_hugepages(file) false |
40716e29 | 278 | static inline struct file * |
af73e4d9 NH |
279 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
280 | struct user_struct **user, int creat_flags, | |
42d7395f | 281 | int page_size_log) |
e9ea0e2d AM |
282 | { |
283 | return ERR_PTR(-ENOSYS); | |
284 | } | |
1da177e4 LT |
285 | |
286 | #endif /* !CONFIG_HUGETLBFS */ | |
287 | ||
d2ba27e8 AB |
288 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
289 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
290 | unsigned long len, unsigned long pgoff, | |
291 | unsigned long flags); | |
292 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
293 | ||
a5516438 AK |
294 | #ifdef CONFIG_HUGETLB_PAGE |
295 | ||
a3437870 | 296 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
297 | /* Defines one hugetlb page size */ |
298 | struct hstate { | |
e8c5c824 LS |
299 | int next_nid_to_alloc; |
300 | int next_nid_to_free; | |
a5516438 AK |
301 | unsigned int order; |
302 | unsigned long mask; | |
303 | unsigned long max_huge_pages; | |
304 | unsigned long nr_huge_pages; | |
305 | unsigned long free_huge_pages; | |
306 | unsigned long resv_huge_pages; | |
307 | unsigned long surplus_huge_pages; | |
308 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 309 | struct list_head hugepage_activelist; |
a5516438 AK |
310 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
311 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
312 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
313 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
314 | #ifdef CONFIG_CGROUP_HUGETLB |
315 | /* cgroup control files */ | |
316 | struct cftype cgroup_files[5]; | |
317 | #endif | |
a3437870 | 318 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
319 | }; |
320 | ||
53ba51d2 JT |
321 | struct huge_bootmem_page { |
322 | struct list_head list; | |
323 | struct hstate *hstate; | |
ee8f248d BB |
324 | #ifdef CONFIG_HIGHMEM |
325 | phys_addr_t phys; | |
326 | #endif | |
53ba51d2 JT |
327 | }; |
328 | ||
70c3547e MK |
329 | struct page *alloc_huge_page(struct vm_area_struct *vma, |
330 | unsigned long addr, int avoid_reserve); | |
bf50bab2 | 331 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
74060e4d NH |
332 | struct page *alloc_huge_page_noerr(struct vm_area_struct *vma, |
333 | unsigned long addr, int avoid_reserve); | |
ab76ad54 MK |
334 | int huge_add_to_page_cache(struct page *page, struct address_space *mapping, |
335 | pgoff_t idx); | |
bf50bab2 | 336 | |
53ba51d2 JT |
337 | /* arch callback */ |
338 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
339 | ||
e5ff2159 AK |
340 | void __init hugetlb_add_hstate(unsigned order); |
341 | struct hstate *size_to_hstate(unsigned long size); | |
342 | ||
343 | #ifndef HUGE_MAX_HSTATE | |
344 | #define HUGE_MAX_HSTATE 1 | |
345 | #endif | |
346 | ||
347 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
348 | extern unsigned int default_hstate_idx; | |
349 | ||
350 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 351 | |
a137e1cc | 352 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 353 | { |
a137e1cc AK |
354 | struct hugetlbfs_sb_info *hsb; |
355 | hsb = HUGETLBFS_SB(i->i_sb); | |
356 | return hsb->hstate; | |
a5516438 AK |
357 | } |
358 | ||
359 | static inline struct hstate *hstate_file(struct file *f) | |
360 | { | |
496ad9aa | 361 | return hstate_inode(file_inode(f)); |
a5516438 AK |
362 | } |
363 | ||
af73e4d9 NH |
364 | static inline struct hstate *hstate_sizelog(int page_size_log) |
365 | { | |
366 | if (!page_size_log) | |
367 | return &default_hstate; | |
97ad2be1 SL |
368 | |
369 | return size_to_hstate(1UL << page_size_log); | |
af73e4d9 NH |
370 | } |
371 | ||
a137e1cc | 372 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 373 | { |
a137e1cc | 374 | return hstate_file(vma->vm_file); |
a5516438 AK |
375 | } |
376 | ||
377 | static inline unsigned long huge_page_size(struct hstate *h) | |
378 | { | |
379 | return (unsigned long)PAGE_SIZE << h->order; | |
380 | } | |
381 | ||
08fba699 MG |
382 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
383 | ||
3340289d MG |
384 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
385 | ||
a5516438 AK |
386 | static inline unsigned long huge_page_mask(struct hstate *h) |
387 | { | |
388 | return h->mask; | |
389 | } | |
390 | ||
391 | static inline unsigned int huge_page_order(struct hstate *h) | |
392 | { | |
393 | return h->order; | |
394 | } | |
395 | ||
396 | static inline unsigned huge_page_shift(struct hstate *h) | |
397 | { | |
398 | return h->order + PAGE_SHIFT; | |
399 | } | |
400 | ||
bae7f4ae LC |
401 | static inline bool hstate_is_gigantic(struct hstate *h) |
402 | { | |
403 | return huge_page_order(h) >= MAX_ORDER; | |
404 | } | |
405 | ||
a5516438 AK |
406 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
407 | { | |
408 | return 1 << h->order; | |
409 | } | |
410 | ||
411 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
412 | { | |
413 | return huge_page_size(h) / 512; | |
414 | } | |
415 | ||
416 | #include <asm/hugetlb.h> | |
417 | ||
d9ed9faa CM |
418 | #ifndef arch_make_huge_pte |
419 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
420 | struct page *page, int writable) | |
421 | { | |
422 | return entry; | |
423 | } | |
424 | #endif | |
425 | ||
e5ff2159 AK |
426 | static inline struct hstate *page_hstate(struct page *page) |
427 | { | |
309381fe | 428 | VM_BUG_ON_PAGE(!PageHuge(page), page); |
e5ff2159 AK |
429 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
430 | } | |
431 | ||
aa50d3a7 AK |
432 | static inline unsigned hstate_index_to_shift(unsigned index) |
433 | { | |
434 | return hstates[index].order + PAGE_SHIFT; | |
435 | } | |
436 | ||
972dc4de AK |
437 | static inline int hstate_index(struct hstate *h) |
438 | { | |
439 | return h - hstates; | |
440 | } | |
441 | ||
13d60f4b ZY |
442 | pgoff_t __basepage_index(struct page *page); |
443 | ||
444 | /* Return page->index in PAGE_SIZE units */ | |
445 | static inline pgoff_t basepage_index(struct page *page) | |
446 | { | |
447 | if (!PageCompound(page)) | |
448 | return page->index; | |
449 | ||
450 | return __basepage_index(page); | |
451 | } | |
452 | ||
c8721bbb NH |
453 | extern void dissolve_free_huge_pages(unsigned long start_pfn, |
454 | unsigned long end_pfn); | |
100873d7 | 455 | static inline int hugepage_migration_supported(struct hstate *h) |
83467efb | 456 | { |
c177c81e NH |
457 | #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION |
458 | return huge_page_shift(h) == PMD_SHIFT; | |
459 | #else | |
460 | return 0; | |
461 | #endif | |
83467efb | 462 | } |
c8721bbb | 463 | |
cb900f41 KS |
464 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, |
465 | struct mm_struct *mm, pte_t *pte) | |
466 | { | |
467 | if (huge_page_size(h) == PMD_SIZE) | |
468 | return pmd_lockptr(mm, (pmd_t *) pte); | |
469 | VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); | |
470 | return &mm->page_table_lock; | |
471 | } | |
472 | ||
2531c8cf DD |
473 | #ifndef hugepages_supported |
474 | /* | |
475 | * Some platform decide whether they support huge pages at boot | |
476 | * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 | |
477 | * when there is no such support | |
478 | */ | |
479 | #define hugepages_supported() (HPAGE_SHIFT != 0) | |
480 | #endif | |
457c1b27 | 481 | |
5d317b2b NH |
482 | void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); |
483 | ||
484 | static inline void hugetlb_count_add(long l, struct mm_struct *mm) | |
485 | { | |
486 | atomic_long_add(l, &mm->hugetlb_usage); | |
487 | } | |
488 | ||
489 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
490 | { | |
491 | atomic_long_sub(l, &mm->hugetlb_usage); | |
492 | } | |
af73e4d9 | 493 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 494 | struct hstate {}; |
70c3547e | 495 | #define alloc_huge_page(v, a, r) NULL |
bf50bab2 | 496 | #define alloc_huge_page_node(h, nid) NULL |
74060e4d | 497 | #define alloc_huge_page_noerr(v, a, r) NULL |
53ba51d2 | 498 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 | 499 | #define hstate_file(f) NULL |
af73e4d9 | 500 | #define hstate_sizelog(s) NULL |
a5516438 AK |
501 | #define hstate_vma(v) NULL |
502 | #define hstate_inode(i) NULL | |
cb900f41 | 503 | #define page_hstate(page) NULL |
a5516438 AK |
504 | #define huge_page_size(h) PAGE_SIZE |
505 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 506 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 507 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
508 | #define huge_page_order(h) 0 |
509 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
510 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
511 | { | |
512 | return 1; | |
513 | } | |
aa50d3a7 | 514 | #define hstate_index_to_shift(index) 0 |
972dc4de | 515 | #define hstate_index(h) 0 |
13d60f4b ZY |
516 | |
517 | static inline pgoff_t basepage_index(struct page *page) | |
518 | { | |
519 | return page->index; | |
520 | } | |
c8721bbb | 521 | #define dissolve_free_huge_pages(s, e) do {} while (0) |
100873d7 | 522 | #define hugepage_migration_supported(h) 0 |
cb900f41 KS |
523 | |
524 | static inline spinlock_t *huge_pte_lockptr(struct hstate *h, | |
525 | struct mm_struct *mm, pte_t *pte) | |
526 | { | |
527 | return &mm->page_table_lock; | |
528 | } | |
5d317b2b NH |
529 | |
530 | static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m) | |
531 | { | |
532 | } | |
533 | ||
534 | static inline void hugetlb_count_sub(long l, struct mm_struct *mm) | |
535 | { | |
536 | } | |
af73e4d9 | 537 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 538 | |
cb900f41 KS |
539 | static inline spinlock_t *huge_pte_lock(struct hstate *h, |
540 | struct mm_struct *mm, pte_t *pte) | |
541 | { | |
542 | spinlock_t *ptl; | |
543 | ||
544 | ptl = huge_pte_lockptr(h, mm, pte); | |
545 | spin_lock(ptl); | |
546 | return ptl; | |
547 | } | |
548 | ||
1da177e4 | 549 | #endif /* _LINUX_HUGETLB_H */ |