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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> |
4e950f6f | 5 | #include <linux/fs.h> |
8edf344c | 6 | #include <linux/hugetlb_inline.h> |
4e950f6f | 7 | |
e9ea0e2d AM |
8 | struct ctl_table; |
9 | struct user_struct; | |
24669e58 | 10 | struct mmu_gather; |
e9ea0e2d | 11 | |
1da177e4 LT |
12 | #ifdef CONFIG_HUGETLB_PAGE |
13 | ||
14 | #include <linux/mempolicy.h> | |
516dffdc | 15 | #include <linux/shm.h> |
63551ae0 | 16 | #include <asm/tlbflush.h> |
1da177e4 | 17 | |
90481622 DG |
18 | struct hugepage_subpool { |
19 | spinlock_t lock; | |
20 | long count; | |
21 | long max_hpages, used_hpages; | |
22 | }; | |
23 | ||
24 | struct hugepage_subpool *hugepage_new_subpool(long nr_blocks); | |
25 | void hugepage_put_subpool(struct hugepage_subpool *spool); | |
26 | ||
20a0307c WF |
27 | int PageHuge(struct page *page); |
28 | ||
a1e78772 | 29 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
30 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
31 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
32 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
33 | |
34 | #ifdef CONFIG_NUMA | |
35 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
36 | void __user *, size_t *, loff_t *); | |
37 | #endif | |
38 | ||
1da177e4 | 39 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
2a15efc9 HD |
40 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
41 | struct page **, struct vm_area_struct **, | |
42 | unsigned long *, int *, int, unsigned int flags); | |
04f2cbe3 | 43 | void unmap_hugepage_range(struct vm_area_struct *, |
24669e58 AK |
44 | unsigned long, unsigned long, struct page *); |
45 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, | |
46 | unsigned long start, unsigned long end, | |
47 | struct page *ref_page); | |
1da177e4 | 48 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
e1759c21 | 49 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 50 | int hugetlb_report_node_meminfo(int, char *); |
1da177e4 | 51 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 52 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 53 | unsigned long address, unsigned int flags); |
a1e78772 | 54 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 55 | struct vm_area_struct *vma, |
ca16d140 | 56 | vm_flags_t vm_flags); |
a43a8c39 | 57 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 58 | int dequeue_hwpoisoned_huge_page(struct page *page); |
0ebabb41 | 59 | void copy_huge_page(struct page *dst, struct page *src); |
1da177e4 | 60 | |
396faf03 | 61 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
62 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
63 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 64 | extern struct list_head huge_boot_pages; |
1da177e4 | 65 | |
63551ae0 DG |
66 | /* arch callbacks */ |
67 | ||
a5516438 AK |
68 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
69 | unsigned long addr, unsigned long sz); | |
63551ae0 | 70 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 71 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
72 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
73 | int write); | |
74 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
75 | pmd_t *pmd, int write); | |
ceb86879 AK |
76 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
77 | pud_t *pud, int write); | |
63551ae0 | 78 | int pmd_huge(pmd_t pmd); |
ceb86879 | 79 | int pud_huge(pud_t pmd); |
8f860591 ZY |
80 | void hugetlb_change_protection(struct vm_area_struct *vma, |
81 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 82 | |
1da177e4 LT |
83 | #else /* !CONFIG_HUGETLB_PAGE */ |
84 | ||
20a0307c WF |
85 | static inline int PageHuge(struct page *page) |
86 | { | |
87 | return 0; | |
88 | } | |
89 | ||
a1e78772 MG |
90 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
91 | { | |
92 | } | |
93 | ||
1da177e4 LT |
94 | static inline unsigned long hugetlb_total_pages(void) |
95 | { | |
96 | return 0; | |
97 | } | |
98 | ||
5b23dbe8 | 99 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
100 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
101 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
102 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
e1759c21 AD |
103 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
104 | { | |
105 | } | |
1da177e4 LT |
106 | #define hugetlb_report_node_meminfo(n, buf) 0 |
107 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
ceb86879 | 108 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 109 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 110 | #define pmd_huge(x) 0 |
ceb86879 | 111 | #define pud_huge(x) 0 |
1da177e4 | 112 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 113 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 114 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
0fe6e20b | 115 | #define huge_pte_offset(mm, address) 0 |
24669e58 AK |
116 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
0ebabb41 NH |
121 | static inline void copy_huge_page(struct page *dst, struct page *src) |
122 | { | |
123 | } | |
1da177e4 | 124 | |
8f860591 ZY |
125 | #define hugetlb_change_protection(vma, address, end, newprot) |
126 | ||
24669e58 AK |
127 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
128 | struct vm_area_struct *vma, unsigned long start, | |
129 | unsigned long end, struct page *ref_page) | |
130 | { | |
131 | BUG(); | |
132 | } | |
133 | ||
1da177e4 LT |
134 | #endif /* !CONFIG_HUGETLB_PAGE */ |
135 | ||
4e52780d EM |
136 | #define HUGETLB_ANON_FILE "anon_hugepage" |
137 | ||
6bfde05b EM |
138 | enum { |
139 | /* | |
140 | * The file will be used as an shm file so shmfs accounting rules | |
141 | * apply | |
142 | */ | |
143 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
144 | /* |
145 | * The file is being created on the internal vfs mount and shmfs | |
146 | * accounting rules do not apply | |
147 | */ | |
148 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
149 | }; |
150 | ||
1da177e4 | 151 | #ifdef CONFIG_HUGETLBFS |
1da177e4 | 152 | struct hugetlbfs_sb_info { |
1da177e4 LT |
153 | long max_inodes; /* inodes allowed */ |
154 | long free_inodes; /* inodes free */ | |
155 | spinlock_t stat_lock; | |
a137e1cc | 156 | struct hstate *hstate; |
90481622 | 157 | struct hugepage_subpool *spool; |
1da177e4 LT |
158 | }; |
159 | ||
1da177e4 LT |
160 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
161 | { | |
162 | return sb->s_fs_info; | |
163 | } | |
164 | ||
4b6f5d20 | 165 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 166 | extern const struct vm_operations_struct hugetlb_vm_ops; |
40716e29 ST |
167 | struct file *hugetlb_file_setup(const char *name, unsigned long addr, |
168 | size_t size, vm_flags_t acct, | |
6bfde05b | 169 | struct user_struct **user, int creat_flags); |
1da177e4 LT |
170 | |
171 | static inline int is_file_hugepages(struct file *file) | |
172 | { | |
516dffdc AL |
173 | if (file->f_op == &hugetlbfs_file_operations) |
174 | return 1; | |
175 | if (is_file_shm_hugepages(file)) | |
176 | return 1; | |
177 | ||
178 | return 0; | |
1da177e4 LT |
179 | } |
180 | ||
1da177e4 LT |
181 | #else /* !CONFIG_HUGETLBFS */ |
182 | ||
1db8508c | 183 | #define is_file_hugepages(file) 0 |
40716e29 ST |
184 | static inline struct file * |
185 | hugetlb_file_setup(const char *name, unsigned long addr, size_t size, | |
ca16d140 | 186 | vm_flags_t acctflag, struct user_struct **user, int creat_flags) |
e9ea0e2d AM |
187 | { |
188 | return ERR_PTR(-ENOSYS); | |
189 | } | |
1da177e4 LT |
190 | |
191 | #endif /* !CONFIG_HUGETLBFS */ | |
192 | ||
d2ba27e8 AB |
193 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
194 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
195 | unsigned long len, unsigned long pgoff, | |
196 | unsigned long flags); | |
197 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
198 | ||
a5516438 AK |
199 | #ifdef CONFIG_HUGETLB_PAGE |
200 | ||
a3437870 | 201 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
202 | /* Defines one hugetlb page size */ |
203 | struct hstate { | |
e8c5c824 LS |
204 | int next_nid_to_alloc; |
205 | int next_nid_to_free; | |
a5516438 AK |
206 | unsigned int order; |
207 | unsigned long mask; | |
208 | unsigned long max_huge_pages; | |
209 | unsigned long nr_huge_pages; | |
210 | unsigned long free_huge_pages; | |
211 | unsigned long resv_huge_pages; | |
212 | unsigned long surplus_huge_pages; | |
213 | unsigned long nr_overcommit_huge_pages; | |
214 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
215 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
216 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
217 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
a3437870 | 218 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
219 | }; |
220 | ||
53ba51d2 JT |
221 | struct huge_bootmem_page { |
222 | struct list_head list; | |
223 | struct hstate *hstate; | |
ee8f248d BB |
224 | #ifdef CONFIG_HIGHMEM |
225 | phys_addr_t phys; | |
226 | #endif | |
53ba51d2 JT |
227 | }; |
228 | ||
bf50bab2 NH |
229 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
230 | ||
53ba51d2 JT |
231 | /* arch callback */ |
232 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
233 | ||
e5ff2159 AK |
234 | void __init hugetlb_add_hstate(unsigned order); |
235 | struct hstate *size_to_hstate(unsigned long size); | |
236 | ||
237 | #ifndef HUGE_MAX_HSTATE | |
238 | #define HUGE_MAX_HSTATE 1 | |
239 | #endif | |
240 | ||
241 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
242 | extern unsigned int default_hstate_idx; | |
243 | ||
244 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 245 | |
a137e1cc | 246 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 247 | { |
a137e1cc AK |
248 | struct hugetlbfs_sb_info *hsb; |
249 | hsb = HUGETLBFS_SB(i->i_sb); | |
250 | return hsb->hstate; | |
a5516438 AK |
251 | } |
252 | ||
253 | static inline struct hstate *hstate_file(struct file *f) | |
254 | { | |
a137e1cc | 255 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
256 | } |
257 | ||
a137e1cc | 258 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 259 | { |
a137e1cc | 260 | return hstate_file(vma->vm_file); |
a5516438 AK |
261 | } |
262 | ||
263 | static inline unsigned long huge_page_size(struct hstate *h) | |
264 | { | |
265 | return (unsigned long)PAGE_SIZE << h->order; | |
266 | } | |
267 | ||
08fba699 MG |
268 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
269 | ||
3340289d MG |
270 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
271 | ||
a5516438 AK |
272 | static inline unsigned long huge_page_mask(struct hstate *h) |
273 | { | |
274 | return h->mask; | |
275 | } | |
276 | ||
277 | static inline unsigned int huge_page_order(struct hstate *h) | |
278 | { | |
279 | return h->order; | |
280 | } | |
281 | ||
282 | static inline unsigned huge_page_shift(struct hstate *h) | |
283 | { | |
284 | return h->order + PAGE_SHIFT; | |
285 | } | |
286 | ||
287 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
288 | { | |
289 | return 1 << h->order; | |
290 | } | |
291 | ||
292 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
293 | { | |
294 | return huge_page_size(h) / 512; | |
295 | } | |
296 | ||
297 | #include <asm/hugetlb.h> | |
298 | ||
d9ed9faa CM |
299 | #ifndef arch_make_huge_pte |
300 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, | |
301 | struct page *page, int writable) | |
302 | { | |
303 | return entry; | |
304 | } | |
305 | #endif | |
306 | ||
e5ff2159 AK |
307 | static inline struct hstate *page_hstate(struct page *page) |
308 | { | |
309 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
310 | } | |
311 | ||
aa50d3a7 AK |
312 | static inline unsigned hstate_index_to_shift(unsigned index) |
313 | { | |
314 | return hstates[index].order + PAGE_SHIFT; | |
315 | } | |
316 | ||
972dc4de AK |
317 | static inline int hstate_index(struct hstate *h) |
318 | { | |
319 | return h - hstates; | |
320 | } | |
321 | ||
a5516438 AK |
322 | #else |
323 | struct hstate {}; | |
bf50bab2 | 324 | #define alloc_huge_page_node(h, nid) NULL |
53ba51d2 | 325 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
326 | #define hstate_file(f) NULL |
327 | #define hstate_vma(v) NULL | |
328 | #define hstate_inode(i) NULL | |
329 | #define huge_page_size(h) PAGE_SIZE | |
330 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 331 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 332 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
333 | #define huge_page_order(h) 0 |
334 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
335 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
336 | { | |
337 | return 1; | |
338 | } | |
aa50d3a7 | 339 | #define hstate_index_to_shift(index) 0 |
972dc4de | 340 | #define hstate_index(h) 0 |
a5516438 AK |
341 | #endif |
342 | ||
1da177e4 | 343 | #endif /* _LINUX_HUGETLB_H */ |