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