Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
be93d8cf | 4 | #include <linux/mm_types.h> |
4e950f6f | 5 | #include <linux/fs.h> |
8edf344c | 6 | #include <linux/hugetlb_inline.h> |
abb8206c | 7 | #include <linux/cgroup.h> |
4e950f6f | 8 | |
e9ea0e2d AM |
9 | struct ctl_table; |
10 | struct user_struct; | |
24669e58 | 11 | struct mmu_gather; |
e9ea0e2d | 12 | |
1da177e4 LT |
13 | #ifdef CONFIG_HUGETLB_PAGE |
14 | ||
15 | #include <linux/mempolicy.h> | |
516dffdc | 16 | #include <linux/shm.h> |
63551ae0 | 17 | #include <asm/tlbflush.h> |
1da177e4 | 18 | |
90481622 DG |
19 | struct hugepage_subpool { |
20 | spinlock_t lock; | |
21 | long count; | |
22 | long max_hpages, used_hpages; | |
23 | }; | |
24 | ||
c3f38a38 AK |
25 | extern spinlock_t hugetlb_lock; |
26 | extern int hugetlb_max_hstate __read_mostly; | |
27 | #define for_each_hstate(h) \ | |
28 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) | |
29 | ||
90481622 DG |
30 | struct hugepage_subpool *hugepage_new_subpool(long nr_blocks); |
31 | void hugepage_put_subpool(struct hugepage_subpool *spool); | |
32 | ||
20a0307c WF |
33 | int PageHuge(struct page *page); |
34 | ||
a1e78772 | 35 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
36 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
37 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
38 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
39 | |
40 | #ifdef CONFIG_NUMA | |
41 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
42 | void __user *, size_t *, loff_t *); | |
43 | #endif | |
44 | ||
1da177e4 | 45 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
28a35716 ML |
46 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
47 | struct page **, struct vm_area_struct **, | |
48 | unsigned long *, unsigned long *, long, unsigned int); | |
04f2cbe3 | 49 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 | 50 | unsigned long, unsigned long, struct page *); |
d833352a MG |
51 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
52 | struct vm_area_struct *vma, | |
53 | unsigned long start, unsigned long end, | |
54 | struct page *ref_page); | |
24669e58 AK |
55 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
56 | unsigned long start, unsigned long end, | |
57 | struct page *ref_page); | |
e1759c21 | 58 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 59 | int hugetlb_report_node_meminfo(int, char *); |
949f7ec5 | 60 | void hugetlb_show_meminfo(void); |
1da177e4 | 61 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 62 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 63 | unsigned long address, unsigned int flags); |
a1e78772 | 64 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 65 | struct vm_area_struct *vma, |
ca16d140 | 66 | vm_flags_t vm_flags); |
a43a8c39 | 67 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 68 | int dequeue_hwpoisoned_huge_page(struct page *page); |
0ebabb41 | 69 | void copy_huge_page(struct page *dst, struct page *src); |
1da177e4 | 70 | |
3212b535 SC |
71 | #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE |
72 | pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); | |
73 | #endif | |
74 | ||
396faf03 | 75 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
76 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
77 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 78 | extern struct list_head huge_boot_pages; |
1da177e4 | 79 | |
63551ae0 DG |
80 | /* arch callbacks */ |
81 | ||
a5516438 AK |
82 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
83 | unsigned long addr, unsigned long sz); | |
63551ae0 | 84 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 85 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
86 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
87 | int write); | |
88 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
89 | pmd_t *pmd, int write); | |
ceb86879 AK |
90 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
91 | pud_t *pud, int write); | |
63551ae0 | 92 | int pmd_huge(pmd_t pmd); |
ceb86879 | 93 | int pud_huge(pud_t pmd); |
7da4d641 | 94 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 95 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 96 | |
1da177e4 LT |
97 | #else /* !CONFIG_HUGETLB_PAGE */ |
98 | ||
20a0307c WF |
99 | static inline int PageHuge(struct page *page) |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
a1e78772 MG |
104 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
105 | { | |
106 | } | |
107 | ||
1da177e4 LT |
108 | static inline unsigned long hugetlb_total_pages(void) |
109 | { | |
110 | return 0; | |
111 | } | |
112 | ||
5b23dbe8 | 113 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
114 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
115 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
116 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
117 | { | |
118 | } | |
1da177e4 | 119 | #define hugetlb_report_node_meminfo(n, buf) 0 |
949f7ec5 DR |
120 | static inline void hugetlb_show_meminfo(void) |
121 | { | |
122 | } | |
1da177e4 | 123 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
ceb86879 | 124 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 125 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 126 | #define pmd_huge(x) 0 |
ceb86879 | 127 | #define pud_huge(x) 0 |
1da177e4 | 128 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 129 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 130 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 131 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
132 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
133 | { | |
134 | return 0; | |
135 | } | |
136 | ||
0ebabb41 NH |
137 | static inline void copy_huge_page(struct page *dst, struct page *src) |
138 | { | |
139 | } | |
1da177e4 | 140 | |
7da4d641 PZ |
141 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
142 | unsigned long address, unsigned long end, pgprot_t newprot) | |
143 | { | |
144 | return 0; | |
145 | } | |
8f860591 | 146 | |
d833352a MG |
147 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
148 | struct vm_area_struct *vma, unsigned long start, | |
149 | unsigned long end, struct page *ref_page) | |
150 | { | |
151 | BUG(); | |
152 | } | |
153 | ||
24669e58 AK |
154 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
155 | struct vm_area_struct *vma, unsigned long start, | |
156 | unsigned long end, struct page *ref_page) | |
157 | { | |
158 | BUG(); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | #endif /* !CONFIG_HUGETLB_PAGE */ |
162 | ||
4e52780d EM |
163 | #define HUGETLB_ANON_FILE "anon_hugepage" |
164 | ||
6bfde05b EM |
165 | enum { |
166 | /* | |
167 | * The file will be used as an shm file so shmfs accounting rules | |
168 | * apply | |
169 | */ | |
170 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
171 | /* |
172 | * The file is being created on the internal vfs mount and shmfs | |
173 | * accounting rules do not apply | |
174 | */ | |
175 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
176 | }; |
177 | ||
1da177e4 | 178 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 179 | struct hugetlbfs_sb_info { |
1da177e4 LT |
180 | long max_inodes; /* inodes allowed */ |
181 | long free_inodes; /* inodes free */ | |
182 | spinlock_t stat_lock; | |
a137e1cc | 183 | struct hstate *hstate; |
90481622 | 184 | struct hugepage_subpool *spool; |
1da177e4 LT |
185 | }; |
186 | ||
1da177e4 LT |
187 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
188 | { | |
189 | return sb->s_fs_info; | |
190 | } | |
191 | ||
4b6f5d20 | 192 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 193 | extern const struct vm_operations_struct hugetlb_vm_ops; |
af73e4d9 | 194 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
42d7395f AK |
195 | struct user_struct **user, int creat_flags, |
196 | int page_size_log); | |
1da177e4 LT |
197 | |
198 | static inline int is_file_hugepages(struct file *file) | |
199 | { | |
516dffdc AL |
200 | if (file->f_op == &hugetlbfs_file_operations) |
201 | return 1; | |
202 | if (is_file_shm_hugepages(file)) | |
203 | return 1; | |
204 | ||
205 | return 0; | |
1da177e4 LT |
206 | } |
207 | ||
42d7395f | 208 | |
1da177e4 LT |
209 | #else /* !CONFIG_HUGETLBFS */ |
210 | ||
1db8508c | 211 | #define is_file_hugepages(file) 0 |
40716e29 | 212 | static inline struct file * |
af73e4d9 NH |
213 | hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, |
214 | struct user_struct **user, int creat_flags, | |
42d7395f | 215 | int page_size_log) |
e9ea0e2d AM |
216 | { |
217 | return ERR_PTR(-ENOSYS); | |
218 | } | |
1da177e4 LT |
219 | |
220 | #endif /* !CONFIG_HUGETLBFS */ | |
221 | ||
d2ba27e8 AB |
222 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
223 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
224 | unsigned long len, unsigned long pgoff, | |
225 | unsigned long flags); | |
226 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
227 | ||
a5516438 AK |
228 | #ifdef CONFIG_HUGETLB_PAGE |
229 | ||
a3437870 | 230 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
231 | /* Defines one hugetlb page size */ |
232 | struct hstate { | |
e8c5c824 LS |
233 | int next_nid_to_alloc; |
234 | int next_nid_to_free; | |
a5516438 AK |
235 | unsigned int order; |
236 | unsigned long mask; | |
237 | unsigned long max_huge_pages; | |
238 | unsigned long nr_huge_pages; | |
239 | unsigned long free_huge_pages; | |
240 | unsigned long resv_huge_pages; | |
241 | unsigned long surplus_huge_pages; | |
242 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 243 | struct list_head hugepage_activelist; |
a5516438 AK |
244 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
245 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
246 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
247 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
248 | #ifdef CONFIG_CGROUP_HUGETLB |
249 | /* cgroup control files */ | |
250 | struct cftype cgroup_files[5]; | |
251 | #endif | |
a3437870 | 252 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
253 | }; |
254 | ||
53ba51d2 JT |
255 | struct huge_bootmem_page { |
256 | struct list_head list; | |
257 | struct hstate *hstate; | |
ee8f248d BB |
258 | #ifdef CONFIG_HIGHMEM |
259 | phys_addr_t phys; | |
260 | #endif | |
53ba51d2 JT |
261 | }; |
262 | ||
bf50bab2 NH |
263 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
264 | ||
53ba51d2 JT |
265 | /* arch callback */ |
266 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
267 | ||
e5ff2159 AK |
268 | void __init hugetlb_add_hstate(unsigned order); |
269 | struct hstate *size_to_hstate(unsigned long size); | |
270 | ||
271 | #ifndef HUGE_MAX_HSTATE | |
272 | #define HUGE_MAX_HSTATE 1 | |
273 | #endif | |
274 | ||
275 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
276 | extern unsigned int default_hstate_idx; | |
277 | ||
278 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 279 | |
a137e1cc | 280 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 281 | { |
a137e1cc AK |
282 | struct hugetlbfs_sb_info *hsb; |
283 | hsb = HUGETLBFS_SB(i->i_sb); | |
284 | return hsb->hstate; | |
a5516438 AK |
285 | } |
286 | ||
287 | static inline struct hstate *hstate_file(struct file *f) | |
288 | { | |
496ad9aa | 289 | return hstate_inode(file_inode(f)); |
a5516438 AK |
290 | } |
291 | ||
af73e4d9 NH |
292 | static inline struct hstate *hstate_sizelog(int page_size_log) |
293 | { | |
294 | if (!page_size_log) | |
295 | return &default_hstate; | |
296 | return size_to_hstate(1 << page_size_log); | |
297 | } | |
298 | ||
a137e1cc | 299 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 300 | { |
a137e1cc | 301 | return hstate_file(vma->vm_file); |
a5516438 AK |
302 | } |
303 | ||
304 | static inline unsigned long huge_page_size(struct hstate *h) | |
305 | { | |
306 | return (unsigned long)PAGE_SIZE << h->order; | |
307 | } | |
308 | ||
08fba699 MG |
309 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
310 | ||
3340289d MG |
311 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
312 | ||
a5516438 AK |
313 | static inline unsigned long huge_page_mask(struct hstate *h) |
314 | { | |
315 | return h->mask; | |
316 | } | |
317 | ||
318 | static inline unsigned int huge_page_order(struct hstate *h) | |
319 | { | |
320 | return h->order; | |
321 | } | |
322 | ||
323 | static inline unsigned huge_page_shift(struct hstate *h) | |
324 | { | |
325 | return h->order + PAGE_SHIFT; | |
326 | } | |
327 | ||
328 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
329 | { | |
330 | return 1 << h->order; | |
331 | } | |
332 | ||
333 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
334 | { | |
335 | return huge_page_size(h) / 512; | |
336 | } | |
337 | ||
338 | #include <asm/hugetlb.h> | |
339 | ||
d9ed9faa CM |
340 | #ifndef arch_make_huge_pte |
341 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
342 | struct page *page, int writable) | |
343 | { | |
344 | return entry; | |
345 | } | |
346 | #endif | |
347 | ||
e5ff2159 AK |
348 | static inline struct hstate *page_hstate(struct page *page) |
349 | { | |
350 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
351 | } | |
352 | ||
aa50d3a7 AK |
353 | static inline unsigned hstate_index_to_shift(unsigned index) |
354 | { | |
355 | return hstates[index].order + PAGE_SHIFT; | |
356 | } | |
357 | ||
972dc4de AK |
358 | static inline int hstate_index(struct hstate *h) |
359 | { | |
360 | return h - hstates; | |
361 | } | |
362 | ||
13d60f4b ZY |
363 | pgoff_t __basepage_index(struct page *page); |
364 | ||
365 | /* Return page->index in PAGE_SIZE units */ | |
366 | static inline pgoff_t basepage_index(struct page *page) | |
367 | { | |
368 | if (!PageCompound(page)) | |
369 | return page->index; | |
370 | ||
371 | return __basepage_index(page); | |
372 | } | |
373 | ||
af73e4d9 | 374 | #else /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 375 | struct hstate {}; |
bf50bab2 | 376 | #define alloc_huge_page_node(h, nid) NULL |
53ba51d2 | 377 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 | 378 | #define hstate_file(f) NULL |
af73e4d9 | 379 | #define hstate_sizelog(s) NULL |
a5516438 AK |
380 | #define hstate_vma(v) NULL |
381 | #define hstate_inode(i) NULL | |
382 | #define huge_page_size(h) PAGE_SIZE | |
383 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 384 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 385 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
386 | #define huge_page_order(h) 0 |
387 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
388 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
389 | { | |
390 | return 1; | |
391 | } | |
aa50d3a7 | 392 | #define hstate_index_to_shift(index) 0 |
972dc4de | 393 | #define hstate_index(h) 0 |
13d60f4b ZY |
394 | |
395 | static inline pgoff_t basepage_index(struct page *page) | |
396 | { | |
397 | return page->index; | |
398 | } | |
af73e4d9 | 399 | #endif /* CONFIG_HUGETLB_PAGE */ |
a5516438 | 400 | |
1da177e4 | 401 | #endif /* _LINUX_HUGETLB_H */ |