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