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 *); |
2a15efc9 HD |
46 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
47 | struct page **, struct vm_area_struct **, | |
48 | unsigned long *, int *, int, unsigned int flags); | |
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 *); |
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 | |
396faf03 | 71 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
72 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
73 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 74 | extern struct list_head huge_boot_pages; |
1da177e4 | 75 | |
63551ae0 DG |
76 | /* arch callbacks */ |
77 | ||
a5516438 AK |
78 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
79 | unsigned long addr, unsigned long sz); | |
63551ae0 | 80 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 81 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
82 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
83 | int write); | |
84 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
85 | pmd_t *pmd, int write); | |
ceb86879 AK |
86 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
87 | pud_t *pud, int write); | |
63551ae0 | 88 | int pmd_huge(pmd_t pmd); |
ceb86879 | 89 | int pud_huge(pud_t pmd); |
7da4d641 | 90 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
8f860591 | 91 | unsigned long address, unsigned long end, pgprot_t newprot); |
63551ae0 | 92 | |
1da177e4 LT |
93 | #else /* !CONFIG_HUGETLB_PAGE */ |
94 | ||
20a0307c WF |
95 | static inline int PageHuge(struct page *page) |
96 | { | |
97 | return 0; | |
98 | } | |
99 | ||
a1e78772 MG |
100 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
101 | { | |
102 | } | |
103 | ||
1da177e4 LT |
104 | static inline unsigned long hugetlb_total_pages(void) |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
5b23dbe8 | 109 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
110 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
111 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
112 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
113 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
114 | { | |
115 | } | |
1da177e4 LT |
116 | #define hugetlb_report_node_meminfo(n, buf) 0 |
117 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
ceb86879 | 118 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 119 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 120 | #define pmd_huge(x) 0 |
ceb86879 | 121 | #define pud_huge(x) 0 |
1da177e4 | 122 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 123 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 124 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 125 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
126 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
127 | { | |
128 | return 0; | |
129 | } | |
130 | ||
0ebabb41 NH |
131 | static inline void copy_huge_page(struct page *dst, struct page *src) |
132 | { | |
133 | } | |
1da177e4 | 134 | |
7da4d641 PZ |
135 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
136 | unsigned long address, unsigned long end, pgprot_t newprot) | |
137 | { | |
138 | return 0; | |
139 | } | |
8f860591 | 140 | |
d833352a MG |
141 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
142 | struct vm_area_struct *vma, unsigned long start, | |
143 | unsigned long end, struct page *ref_page) | |
144 | { | |
145 | BUG(); | |
146 | } | |
147 | ||
24669e58 AK |
148 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
149 | struct vm_area_struct *vma, unsigned long start, | |
150 | unsigned long end, struct page *ref_page) | |
151 | { | |
152 | BUG(); | |
153 | } | |
154 | ||
1da177e4 LT |
155 | #endif /* !CONFIG_HUGETLB_PAGE */ |
156 | ||
4e52780d EM |
157 | #define HUGETLB_ANON_FILE "anon_hugepage" |
158 | ||
6bfde05b EM |
159 | enum { |
160 | /* | |
161 | * The file will be used as an shm file so shmfs accounting rules | |
162 | * apply | |
163 | */ | |
164 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
165 | /* |
166 | * The file is being created on the internal vfs mount and shmfs | |
167 | * accounting rules do not apply | |
168 | */ | |
169 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
170 | }; |
171 | ||
1da177e4 | 172 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 173 | struct hugetlbfs_sb_info { |
1da177e4 LT |
174 | long max_inodes; /* inodes allowed */ |
175 | long free_inodes; /* inodes free */ | |
176 | spinlock_t stat_lock; | |
a137e1cc | 177 | struct hstate *hstate; |
90481622 | 178 | struct hugepage_subpool *spool; |
1da177e4 LT |
179 | }; |
180 | ||
1da177e4 LT |
181 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
182 | { | |
183 | return sb->s_fs_info; | |
184 | } | |
185 | ||
4b6f5d20 | 186 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 187 | extern const struct vm_operations_struct hugetlb_vm_ops; |
40716e29 ST |
188 | struct file *hugetlb_file_setup(const char *name, unsigned long addr, |
189 | size_t size, vm_flags_t acct, | |
42d7395f AK |
190 | struct user_struct **user, int creat_flags, |
191 | int page_size_log); | |
1da177e4 LT |
192 | |
193 | static inline int is_file_hugepages(struct file *file) | |
194 | { | |
516dffdc AL |
195 | if (file->f_op == &hugetlbfs_file_operations) |
196 | return 1; | |
197 | if (is_file_shm_hugepages(file)) | |
198 | return 1; | |
199 | ||
200 | return 0; | |
1da177e4 LT |
201 | } |
202 | ||
42d7395f | 203 | |
1da177e4 LT |
204 | #else /* !CONFIG_HUGETLBFS */ |
205 | ||
1db8508c | 206 | #define is_file_hugepages(file) 0 |
40716e29 ST |
207 | static inline struct file * |
208 | hugetlb_file_setup(const char *name, unsigned long addr, size_t size, | |
42d7395f AK |
209 | vm_flags_t acctflag, struct user_struct **user, int creat_flags, |
210 | int page_size_log) | |
e9ea0e2d AM |
211 | { |
212 | return ERR_PTR(-ENOSYS); | |
213 | } | |
1da177e4 LT |
214 | |
215 | #endif /* !CONFIG_HUGETLBFS */ | |
216 | ||
d2ba27e8 AB |
217 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
218 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
219 | unsigned long len, unsigned long pgoff, | |
220 | unsigned long flags); | |
221 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
222 | ||
a5516438 AK |
223 | #ifdef CONFIG_HUGETLB_PAGE |
224 | ||
a3437870 | 225 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
226 | /* Defines one hugetlb page size */ |
227 | struct hstate { | |
e8c5c824 LS |
228 | int next_nid_to_alloc; |
229 | int next_nid_to_free; | |
a5516438 AK |
230 | unsigned int order; |
231 | unsigned long mask; | |
232 | unsigned long max_huge_pages; | |
233 | unsigned long nr_huge_pages; | |
234 | unsigned long free_huge_pages; | |
235 | unsigned long resv_huge_pages; | |
236 | unsigned long surplus_huge_pages; | |
237 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 238 | struct list_head hugepage_activelist; |
a5516438 AK |
239 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
240 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
241 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
242 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
243 | #ifdef CONFIG_CGROUP_HUGETLB |
244 | /* cgroup control files */ | |
245 | struct cftype cgroup_files[5]; | |
246 | #endif | |
a3437870 | 247 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
248 | }; |
249 | ||
53ba51d2 JT |
250 | struct huge_bootmem_page { |
251 | struct list_head list; | |
252 | struct hstate *hstate; | |
ee8f248d BB |
253 | #ifdef CONFIG_HIGHMEM |
254 | phys_addr_t phys; | |
255 | #endif | |
53ba51d2 JT |
256 | }; |
257 | ||
bf50bab2 NH |
258 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
259 | ||
53ba51d2 JT |
260 | /* arch callback */ |
261 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
262 | ||
e5ff2159 AK |
263 | void __init hugetlb_add_hstate(unsigned order); |
264 | struct hstate *size_to_hstate(unsigned long size); | |
265 | ||
266 | #ifndef HUGE_MAX_HSTATE | |
267 | #define HUGE_MAX_HSTATE 1 | |
268 | #endif | |
269 | ||
270 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
271 | extern unsigned int default_hstate_idx; | |
272 | ||
273 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 274 | |
a137e1cc | 275 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 276 | { |
a137e1cc AK |
277 | struct hugetlbfs_sb_info *hsb; |
278 | hsb = HUGETLBFS_SB(i->i_sb); | |
279 | return hsb->hstate; | |
a5516438 AK |
280 | } |
281 | ||
282 | static inline struct hstate *hstate_file(struct file *f) | |
283 | { | |
a137e1cc | 284 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
285 | } |
286 | ||
a137e1cc | 287 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 288 | { |
a137e1cc | 289 | return hstate_file(vma->vm_file); |
a5516438 AK |
290 | } |
291 | ||
292 | static inline unsigned long huge_page_size(struct hstate *h) | |
293 | { | |
294 | return (unsigned long)PAGE_SIZE << h->order; | |
295 | } | |
296 | ||
08fba699 MG |
297 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
298 | ||
3340289d MG |
299 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
300 | ||
a5516438 AK |
301 | static inline unsigned long huge_page_mask(struct hstate *h) |
302 | { | |
303 | return h->mask; | |
304 | } | |
305 | ||
306 | static inline unsigned int huge_page_order(struct hstate *h) | |
307 | { | |
308 | return h->order; | |
309 | } | |
310 | ||
311 | static inline unsigned huge_page_shift(struct hstate *h) | |
312 | { | |
313 | return h->order + PAGE_SHIFT; | |
314 | } | |
315 | ||
316 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
317 | { | |
318 | return 1 << h->order; | |
319 | } | |
320 | ||
321 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
322 | { | |
323 | return huge_page_size(h) / 512; | |
324 | } | |
325 | ||
326 | #include <asm/hugetlb.h> | |
327 | ||
d9ed9faa CM |
328 | #ifndef arch_make_huge_pte |
329 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
330 | struct page *page, int writable) | |
331 | { | |
332 | return entry; | |
333 | } | |
334 | #endif | |
335 | ||
e5ff2159 AK |
336 | static inline struct hstate *page_hstate(struct page *page) |
337 | { | |
338 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
339 | } | |
340 | ||
aa50d3a7 AK |
341 | static inline unsigned hstate_index_to_shift(unsigned index) |
342 | { | |
343 | return hstates[index].order + PAGE_SHIFT; | |
344 | } | |
345 | ||
972dc4de AK |
346 | static inline int hstate_index(struct hstate *h) |
347 | { | |
348 | return h - hstates; | |
349 | } | |
350 | ||
a5516438 AK |
351 | #else |
352 | struct hstate {}; | |
bf50bab2 | 353 | #define alloc_huge_page_node(h, nid) NULL |
53ba51d2 | 354 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
355 | #define hstate_file(f) NULL |
356 | #define hstate_vma(v) NULL | |
357 | #define hstate_inode(i) NULL | |
358 | #define huge_page_size(h) PAGE_SIZE | |
359 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 360 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 361 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
362 | #define huge_page_order(h) 0 |
363 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
364 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
365 | { | |
366 | return 1; | |
367 | } | |
aa50d3a7 | 368 | #define hstate_index_to_shift(index) 0 |
972dc4de | 369 | #define hstate_index(h) 0 |
a5516438 AK |
370 | #endif |
371 | ||
1da177e4 | 372 | #endif /* _LINUX_HUGETLB_H */ |