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); |
8f860591 ZY |
90 | void hugetlb_change_protection(struct vm_area_struct *vma, |
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 | |
8f860591 ZY |
135 | #define hugetlb_change_protection(vma, address, end, newprot) |
136 | ||
d833352a MG |
137 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
138 | struct vm_area_struct *vma, unsigned long start, | |
139 | unsigned long end, struct page *ref_page) | |
140 | { | |
141 | BUG(); | |
142 | } | |
143 | ||
24669e58 AK |
144 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
145 | struct vm_area_struct *vma, unsigned long start, | |
146 | unsigned long end, struct page *ref_page) | |
147 | { | |
148 | BUG(); | |
149 | } | |
150 | ||
1da177e4 LT |
151 | #endif /* !CONFIG_HUGETLB_PAGE */ |
152 | ||
4e52780d EM |
153 | #define HUGETLB_ANON_FILE "anon_hugepage" |
154 | ||
6bfde05b EM |
155 | enum { |
156 | /* | |
157 | * The file will be used as an shm file so shmfs accounting rules | |
158 | * apply | |
159 | */ | |
160 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
161 | /* |
162 | * The file is being created on the internal vfs mount and shmfs | |
163 | * accounting rules do not apply | |
164 | */ | |
165 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
166 | }; |
167 | ||
1da177e4 | 168 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 169 | struct hugetlbfs_sb_info { |
1da177e4 LT |
170 | long max_inodes; /* inodes allowed */ |
171 | long free_inodes; /* inodes free */ | |
172 | spinlock_t stat_lock; | |
a137e1cc | 173 | struct hstate *hstate; |
90481622 | 174 | struct hugepage_subpool *spool; |
1da177e4 LT |
175 | }; |
176 | ||
1da177e4 LT |
177 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
178 | { | |
179 | return sb->s_fs_info; | |
180 | } | |
181 | ||
4b6f5d20 | 182 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 183 | extern const struct vm_operations_struct hugetlb_vm_ops; |
40716e29 ST |
184 | struct file *hugetlb_file_setup(const char *name, unsigned long addr, |
185 | size_t size, vm_flags_t acct, | |
6bfde05b | 186 | struct user_struct **user, int creat_flags); |
1da177e4 LT |
187 | |
188 | static inline int is_file_hugepages(struct file *file) | |
189 | { | |
516dffdc AL |
190 | if (file->f_op == &hugetlbfs_file_operations) |
191 | return 1; | |
192 | if (is_file_shm_hugepages(file)) | |
193 | return 1; | |
194 | ||
195 | return 0; | |
1da177e4 LT |
196 | } |
197 | ||
1da177e4 LT |
198 | #else /* !CONFIG_HUGETLBFS */ |
199 | ||
1db8508c | 200 | #define is_file_hugepages(file) 0 |
40716e29 ST |
201 | static inline struct file * |
202 | hugetlb_file_setup(const char *name, unsigned long addr, size_t size, | |
ca16d140 | 203 | vm_flags_t acctflag, struct user_struct **user, int creat_flags) |
e9ea0e2d AM |
204 | { |
205 | return ERR_PTR(-ENOSYS); | |
206 | } | |
1da177e4 LT |
207 | |
208 | #endif /* !CONFIG_HUGETLBFS */ | |
209 | ||
d2ba27e8 AB |
210 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
211 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
212 | unsigned long len, unsigned long pgoff, | |
213 | unsigned long flags); | |
214 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
215 | ||
a5516438 AK |
216 | #ifdef CONFIG_HUGETLB_PAGE |
217 | ||
a3437870 | 218 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
219 | /* Defines one hugetlb page size */ |
220 | struct hstate { | |
e8c5c824 LS |
221 | int next_nid_to_alloc; |
222 | int next_nid_to_free; | |
a5516438 AK |
223 | unsigned int order; |
224 | unsigned long mask; | |
225 | unsigned long max_huge_pages; | |
226 | unsigned long nr_huge_pages; | |
227 | unsigned long free_huge_pages; | |
228 | unsigned long resv_huge_pages; | |
229 | unsigned long surplus_huge_pages; | |
230 | unsigned long nr_overcommit_huge_pages; | |
0edaecfa | 231 | struct list_head hugepage_activelist; |
a5516438 AK |
232 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
233 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
234 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
235 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
abb8206c AK |
236 | #ifdef CONFIG_CGROUP_HUGETLB |
237 | /* cgroup control files */ | |
238 | struct cftype cgroup_files[5]; | |
239 | #endif | |
a3437870 | 240 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
241 | }; |
242 | ||
53ba51d2 JT |
243 | struct huge_bootmem_page { |
244 | struct list_head list; | |
245 | struct hstate *hstate; | |
ee8f248d BB |
246 | #ifdef CONFIG_HIGHMEM |
247 | phys_addr_t phys; | |
248 | #endif | |
53ba51d2 JT |
249 | }; |
250 | ||
bf50bab2 NH |
251 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
252 | ||
53ba51d2 JT |
253 | /* arch callback */ |
254 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
255 | ||
e5ff2159 AK |
256 | void __init hugetlb_add_hstate(unsigned order); |
257 | struct hstate *size_to_hstate(unsigned long size); | |
258 | ||
259 | #ifndef HUGE_MAX_HSTATE | |
260 | #define HUGE_MAX_HSTATE 1 | |
261 | #endif | |
262 | ||
263 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
264 | extern unsigned int default_hstate_idx; | |
265 | ||
266 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 267 | |
a137e1cc | 268 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 269 | { |
a137e1cc AK |
270 | struct hugetlbfs_sb_info *hsb; |
271 | hsb = HUGETLBFS_SB(i->i_sb); | |
272 | return hsb->hstate; | |
a5516438 AK |
273 | } |
274 | ||
275 | static inline struct hstate *hstate_file(struct file *f) | |
276 | { | |
a137e1cc | 277 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
278 | } |
279 | ||
a137e1cc | 280 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 281 | { |
a137e1cc | 282 | return hstate_file(vma->vm_file); |
a5516438 AK |
283 | } |
284 | ||
285 | static inline unsigned long huge_page_size(struct hstate *h) | |
286 | { | |
287 | return (unsigned long)PAGE_SIZE << h->order; | |
288 | } | |
289 | ||
08fba699 MG |
290 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
291 | ||
3340289d MG |
292 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
293 | ||
a5516438 AK |
294 | static inline unsigned long huge_page_mask(struct hstate *h) |
295 | { | |
296 | return h->mask; | |
297 | } | |
298 | ||
299 | static inline unsigned int huge_page_order(struct hstate *h) | |
300 | { | |
301 | return h->order; | |
302 | } | |
303 | ||
304 | static inline unsigned huge_page_shift(struct hstate *h) | |
305 | { | |
306 | return h->order + PAGE_SHIFT; | |
307 | } | |
308 | ||
309 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
310 | { | |
311 | return 1 << h->order; | |
312 | } | |
313 | ||
314 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
315 | { | |
316 | return huge_page_size(h) / 512; | |
317 | } | |
318 | ||
319 | #include <asm/hugetlb.h> | |
320 | ||
d9ed9faa CM |
321 | #ifndef arch_make_huge_pte |
322 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
323 | struct page *page, int writable) | |
324 | { | |
325 | return entry; | |
326 | } | |
327 | #endif | |
328 | ||
e5ff2159 AK |
329 | static inline struct hstate *page_hstate(struct page *page) |
330 | { | |
331 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
332 | } | |
333 | ||
aa50d3a7 AK |
334 | static inline unsigned hstate_index_to_shift(unsigned index) |
335 | { | |
336 | return hstates[index].order + PAGE_SHIFT; | |
337 | } | |
338 | ||
972dc4de AK |
339 | static inline int hstate_index(struct hstate *h) |
340 | { | |
341 | return h - hstates; | |
342 | } | |
343 | ||
a5516438 AK |
344 | #else |
345 | struct hstate {}; | |
bf50bab2 | 346 | #define alloc_huge_page_node(h, nid) NULL |
53ba51d2 | 347 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
348 | #define hstate_file(f) NULL |
349 | #define hstate_vma(v) NULL | |
350 | #define hstate_inode(i) NULL | |
351 | #define huge_page_size(h) PAGE_SIZE | |
352 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 353 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 354 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
355 | #define huge_page_order(h) 0 |
356 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
357 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
358 | { | |
359 | return 1; | |
360 | } | |
aa50d3a7 | 361 | #define hstate_index_to_shift(index) 0 |
972dc4de | 362 | #define hstate_index(h) 0 |
a5516438 AK |
363 | #endif |
364 | ||
1da177e4 | 365 | #endif /* _LINUX_HUGETLB_H */ |