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1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4e950f6f AD |
4 | #include <linux/fs.h> |
5 | ||
e9ea0e2d AM |
6 | struct ctl_table; |
7 | struct user_struct; | |
8 | ||
1da177e4 LT |
9 | #ifdef CONFIG_HUGETLB_PAGE |
10 | ||
11 | #include <linux/mempolicy.h> | |
516dffdc | 12 | #include <linux/shm.h> |
63551ae0 | 13 | #include <asm/tlbflush.h> |
1da177e4 | 14 | |
20a0307c WF |
15 | int PageHuge(struct page *page); |
16 | ||
1da177e4 LT |
17 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
18 | { | |
19 | return vma->vm_flags & VM_HUGETLB; | |
20 | } | |
21 | ||
a1e78772 | 22 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
23 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
24 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
25 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
1da177e4 | 26 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
2a15efc9 HD |
27 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
28 | struct page **, struct vm_area_struct **, | |
29 | unsigned long *, int *, int, unsigned int flags); | |
04f2cbe3 MG |
30 | void unmap_hugepage_range(struct vm_area_struct *, |
31 | unsigned long, unsigned long, struct page *); | |
32 | void __unmap_hugepage_range(struct vm_area_struct *, | |
33 | unsigned long, unsigned long, struct page *); | |
1da177e4 | 34 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
e1759c21 | 35 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 36 | int hugetlb_report_node_meminfo(int, char *); |
1da177e4 | 37 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 38 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 39 | unsigned long address, unsigned int flags); |
a1e78772 | 40 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 MG |
41 | struct vm_area_struct *vma, |
42 | int acctflags); | |
a43a8c39 | 43 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
1da177e4 | 44 | |
396faf03 | 45 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
46 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
47 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 48 | extern struct list_head huge_boot_pages; |
1da177e4 | 49 | |
63551ae0 DG |
50 | /* arch callbacks */ |
51 | ||
a5516438 AK |
52 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
53 | unsigned long addr, unsigned long sz); | |
63551ae0 | 54 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 55 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
56 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
57 | int write); | |
58 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
59 | pmd_t *pmd, int write); | |
ceb86879 AK |
60 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
61 | pud_t *pud, int write); | |
63551ae0 | 62 | int pmd_huge(pmd_t pmd); |
ceb86879 | 63 | int pud_huge(pud_t pmd); |
8f860591 ZY |
64 | void hugetlb_change_protection(struct vm_area_struct *vma, |
65 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 66 | |
1da177e4 LT |
67 | #else /* !CONFIG_HUGETLB_PAGE */ |
68 | ||
20a0307c WF |
69 | static inline int PageHuge(struct page *page) |
70 | { | |
71 | return 0; | |
72 | } | |
73 | ||
1da177e4 LT |
74 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
75 | { | |
76 | return 0; | |
77 | } | |
a1e78772 MG |
78 | |
79 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
80 | { | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static inline unsigned long hugetlb_total_pages(void) |
84 | { | |
85 | return 0; | |
86 | } | |
87 | ||
5b23dbe8 | 88 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
89 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
90 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
91 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
04f2cbe3 | 92 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
e1759c21 AD |
93 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
94 | { | |
95 | } | |
1da177e4 LT |
96 | #define hugetlb_report_node_meminfo(n, buf) 0 |
97 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
ceb86879 | 98 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 99 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 100 | #define pmd_huge(x) 0 |
ceb86879 | 101 | #define pud_huge(x) 0 |
1da177e4 | 102 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 103 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 104 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
1da177e4 | 105 | |
8f860591 ZY |
106 | #define hugetlb_change_protection(vma, address, end, newprot) |
107 | ||
1da177e4 | 108 | #ifndef HPAGE_MASK |
51c6f666 RH |
109 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
110 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
111 | #endif |
112 | ||
113 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
114 | ||
4e52780d EM |
115 | #define HUGETLB_ANON_FILE "anon_hugepage" |
116 | ||
6bfde05b EM |
117 | enum { |
118 | /* | |
119 | * The file will be used as an shm file so shmfs accounting rules | |
120 | * apply | |
121 | */ | |
122 | HUGETLB_SHMFS_INODE = 1, | |
4e52780d EM |
123 | /* |
124 | * The file is being created on the internal vfs mount and shmfs | |
125 | * accounting rules do not apply | |
126 | */ | |
127 | HUGETLB_ANONHUGE_INODE = 2, | |
6bfde05b EM |
128 | }; |
129 | ||
1da177e4 LT |
130 | #ifdef CONFIG_HUGETLBFS |
131 | struct hugetlbfs_config { | |
132 | uid_t uid; | |
133 | gid_t gid; | |
134 | umode_t mode; | |
135 | long nr_blocks; | |
136 | long nr_inodes; | |
a137e1cc | 137 | struct hstate *hstate; |
1da177e4 LT |
138 | }; |
139 | ||
140 | struct hugetlbfs_sb_info { | |
141 | long max_blocks; /* blocks allowed */ | |
142 | long free_blocks; /* blocks free */ | |
143 | long max_inodes; /* inodes allowed */ | |
144 | long free_inodes; /* inodes free */ | |
145 | spinlock_t stat_lock; | |
a137e1cc | 146 | struct hstate *hstate; |
1da177e4 LT |
147 | }; |
148 | ||
149 | ||
150 | struct hugetlbfs_inode_info { | |
151 | struct shared_policy policy; | |
152 | struct inode vfs_inode; | |
153 | }; | |
154 | ||
155 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
156 | { | |
157 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
158 | } | |
159 | ||
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; |
353d5c30 | 167 | struct file *hugetlb_file_setup(const char *name, size_t size, int acct, |
6bfde05b | 168 | struct user_struct **user, int creat_flags); |
9a119c05 AL |
169 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
170 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 LT |
171 | |
172 | static inline int is_file_hugepages(struct file *file) | |
173 | { | |
516dffdc AL |
174 | if (file->f_op == &hugetlbfs_file_operations) |
175 | return 1; | |
176 | if (is_file_shm_hugepages(file)) | |
177 | return 1; | |
178 | ||
179 | return 0; | |
1da177e4 LT |
180 | } |
181 | ||
182 | static inline void set_file_hugepages(struct file *file) | |
183 | { | |
184 | file->f_op = &hugetlbfs_file_operations; | |
185 | } | |
186 | #else /* !CONFIG_HUGETLBFS */ | |
187 | ||
1db8508c SR |
188 | #define is_file_hugepages(file) 0 |
189 | #define set_file_hugepages(file) BUG() | |
e9ea0e2d AM |
190 | static inline struct file *hugetlb_file_setup(const char *name, size_t size, |
191 | int acctflag, struct user_struct **user, int creat_flags) | |
192 | { | |
193 | return ERR_PTR(-ENOSYS); | |
194 | } | |
1da177e4 LT |
195 | |
196 | #endif /* !CONFIG_HUGETLBFS */ | |
197 | ||
d2ba27e8 AB |
198 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
199 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
200 | unsigned long len, unsigned long pgoff, | |
201 | unsigned long flags); | |
202 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
203 | ||
a5516438 AK |
204 | #ifdef CONFIG_HUGETLB_PAGE |
205 | ||
a3437870 | 206 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
207 | /* Defines one hugetlb page size */ |
208 | struct hstate { | |
e8c5c824 LS |
209 | int next_nid_to_alloc; |
210 | int next_nid_to_free; | |
a5516438 AK |
211 | unsigned int order; |
212 | unsigned long mask; | |
213 | unsigned long max_huge_pages; | |
214 | unsigned long nr_huge_pages; | |
215 | unsigned long free_huge_pages; | |
216 | unsigned long resv_huge_pages; | |
217 | unsigned long surplus_huge_pages; | |
218 | unsigned long nr_overcommit_huge_pages; | |
219 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
220 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
221 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
222 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
a3437870 | 223 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
224 | }; |
225 | ||
53ba51d2 JT |
226 | struct huge_bootmem_page { |
227 | struct list_head list; | |
228 | struct hstate *hstate; | |
229 | }; | |
230 | ||
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 | ||
e5ff2159 AK |
299 | static inline struct hstate *page_hstate(struct page *page) |
300 | { | |
301 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
302 | } | |
303 | ||
a5516438 AK |
304 | #else |
305 | struct hstate {}; | |
53ba51d2 | 306 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
307 | #define hstate_file(f) NULL |
308 | #define hstate_vma(v) NULL | |
309 | #define hstate_inode(i) NULL | |
310 | #define huge_page_size(h) PAGE_SIZE | |
311 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 312 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 313 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
314 | #define huge_page_order(h) 0 |
315 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
316 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
317 | { | |
318 | return 1; | |
319 | } | |
a5516438 AK |
320 | #endif |
321 | ||
1da177e4 | 322 | #endif /* _LINUX_HUGETLB_H */ |