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> |
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 | |
20a0307c WF |
17 | int PageHuge(struct page *page); |
18 | ||
a1e78772 | 19 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
8d65af78 AD |
20 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
21 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
22 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
06808b08 LS |
23 | |
24 | #ifdef CONFIG_NUMA | |
25 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
26 | void __user *, size_t *, loff_t *); | |
27 | #endif | |
28 | ||
1da177e4 | 29 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
2a15efc9 HD |
30 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
31 | struct page **, struct vm_area_struct **, | |
32 | unsigned long *, int *, int, unsigned int flags); | |
04f2cbe3 MG |
33 | void unmap_hugepage_range(struct vm_area_struct *, |
34 | unsigned long, unsigned long, struct page *); | |
35 | void __unmap_hugepage_range(struct vm_area_struct *, | |
36 | unsigned long, unsigned long, struct page *); | |
1da177e4 | 37 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
e1759c21 | 38 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 39 | int hugetlb_report_node_meminfo(int, char *); |
1da177e4 | 40 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 41 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 42 | unsigned long address, unsigned int flags); |
a1e78772 | 43 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 | 44 | struct vm_area_struct *vma, |
ca16d140 | 45 | vm_flags_t vm_flags); |
a43a8c39 | 46 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
6de2b1aa | 47 | int dequeue_hwpoisoned_huge_page(struct page *page); |
0ebabb41 | 48 | void copy_huge_page(struct page *dst, struct page *src); |
1da177e4 | 49 | |
396faf03 | 50 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
51 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
52 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 53 | extern struct list_head huge_boot_pages; |
1da177e4 | 54 | |
63551ae0 DG |
55 | /* arch callbacks */ |
56 | ||
a5516438 AK |
57 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
58 | unsigned long addr, unsigned long sz); | |
63551ae0 | 59 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 60 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
61 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
62 | int write); | |
63 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
64 | pmd_t *pmd, int write); | |
ceb86879 AK |
65 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
66 | pud_t *pud, int write); | |
63551ae0 | 67 | int pmd_huge(pmd_t pmd); |
ceb86879 | 68 | int pud_huge(pud_t pmd); |
8f860591 ZY |
69 | void hugetlb_change_protection(struct vm_area_struct *vma, |
70 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 71 | |
1da177e4 LT |
72 | #else /* !CONFIG_HUGETLB_PAGE */ |
73 | ||
20a0307c WF |
74 | static inline int PageHuge(struct page *page) |
75 | { | |
76 | return 0; | |
77 | } | |
78 | ||
a1e78772 MG |
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; }) |
0fe6e20b | 105 | #define huge_pte_offset(mm, address) 0 |
6de2b1aa | 106 | #define dequeue_hwpoisoned_huge_page(page) 0 |
0ebabb41 NH |
107 | static inline void copy_huge_page(struct page *dst, struct page *src) |
108 | { | |
109 | } | |
1da177e4 | 110 | |
8f860591 ZY |
111 | #define hugetlb_change_protection(vma, address, end, newprot) |
112 | ||
1da177e4 LT |
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 | 130 | #ifdef CONFIG_HUGETLBFS |
1da177e4 LT |
131 | struct hugetlbfs_sb_info { |
132 | long max_blocks; /* blocks allowed */ | |
133 | long free_blocks; /* blocks free */ | |
134 | long max_inodes; /* inodes allowed */ | |
135 | long free_inodes; /* inodes free */ | |
136 | spinlock_t stat_lock; | |
a137e1cc | 137 | struct hstate *hstate; |
1da177e4 LT |
138 | }; |
139 | ||
1da177e4 LT |
140 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
141 | { | |
142 | return sb->s_fs_info; | |
143 | } | |
144 | ||
4b6f5d20 | 145 | extern const struct file_operations hugetlbfs_file_operations; |
f0f37e2f | 146 | extern const struct vm_operations_struct hugetlb_vm_ops; |
ca16d140 | 147 | struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, |
6bfde05b | 148 | struct user_struct **user, int creat_flags); |
9a119c05 AL |
149 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
150 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 LT |
151 | |
152 | static inline int is_file_hugepages(struct file *file) | |
153 | { | |
516dffdc AL |
154 | if (file->f_op == &hugetlbfs_file_operations) |
155 | return 1; | |
156 | if (is_file_shm_hugepages(file)) | |
157 | return 1; | |
158 | ||
159 | return 0; | |
1da177e4 LT |
160 | } |
161 | ||
1da177e4 LT |
162 | #else /* !CONFIG_HUGETLBFS */ |
163 | ||
1db8508c | 164 | #define is_file_hugepages(file) 0 |
e9ea0e2d | 165 | static inline struct file *hugetlb_file_setup(const char *name, size_t size, |
ca16d140 | 166 | vm_flags_t acctflag, struct user_struct **user, int creat_flags) |
e9ea0e2d AM |
167 | { |
168 | return ERR_PTR(-ENOSYS); | |
169 | } | |
1da177e4 LT |
170 | |
171 | #endif /* !CONFIG_HUGETLBFS */ | |
172 | ||
d2ba27e8 AB |
173 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
174 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
175 | unsigned long len, unsigned long pgoff, | |
176 | unsigned long flags); | |
177 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
178 | ||
a5516438 AK |
179 | #ifdef CONFIG_HUGETLB_PAGE |
180 | ||
a3437870 | 181 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
182 | /* Defines one hugetlb page size */ |
183 | struct hstate { | |
e8c5c824 LS |
184 | int next_nid_to_alloc; |
185 | int next_nid_to_free; | |
a5516438 AK |
186 | unsigned int order; |
187 | unsigned long mask; | |
188 | unsigned long max_huge_pages; | |
189 | unsigned long nr_huge_pages; | |
190 | unsigned long free_huge_pages; | |
191 | unsigned long resv_huge_pages; | |
192 | unsigned long surplus_huge_pages; | |
193 | unsigned long nr_overcommit_huge_pages; | |
194 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
195 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
196 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
197 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
a3437870 | 198 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
199 | }; |
200 | ||
53ba51d2 JT |
201 | struct huge_bootmem_page { |
202 | struct list_head list; | |
203 | struct hstate *hstate; | |
ee8f248d BB |
204 | #ifdef CONFIG_HIGHMEM |
205 | phys_addr_t phys; | |
206 | #endif | |
53ba51d2 JT |
207 | }; |
208 | ||
bf50bab2 NH |
209 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
210 | ||
53ba51d2 JT |
211 | /* arch callback */ |
212 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
213 | ||
e5ff2159 AK |
214 | void __init hugetlb_add_hstate(unsigned order); |
215 | struct hstate *size_to_hstate(unsigned long size); | |
216 | ||
217 | #ifndef HUGE_MAX_HSTATE | |
218 | #define HUGE_MAX_HSTATE 1 | |
219 | #endif | |
220 | ||
221 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
222 | extern unsigned int default_hstate_idx; | |
223 | ||
224 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 225 | |
a137e1cc | 226 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 227 | { |
a137e1cc AK |
228 | struct hugetlbfs_sb_info *hsb; |
229 | hsb = HUGETLBFS_SB(i->i_sb); | |
230 | return hsb->hstate; | |
a5516438 AK |
231 | } |
232 | ||
233 | static inline struct hstate *hstate_file(struct file *f) | |
234 | { | |
a137e1cc | 235 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
236 | } |
237 | ||
a137e1cc | 238 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 239 | { |
a137e1cc | 240 | return hstate_file(vma->vm_file); |
a5516438 AK |
241 | } |
242 | ||
243 | static inline unsigned long huge_page_size(struct hstate *h) | |
244 | { | |
245 | return (unsigned long)PAGE_SIZE << h->order; | |
246 | } | |
247 | ||
08fba699 MG |
248 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
249 | ||
3340289d MG |
250 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
251 | ||
a5516438 AK |
252 | static inline unsigned long huge_page_mask(struct hstate *h) |
253 | { | |
254 | return h->mask; | |
255 | } | |
256 | ||
257 | static inline unsigned int huge_page_order(struct hstate *h) | |
258 | { | |
259 | return h->order; | |
260 | } | |
261 | ||
262 | static inline unsigned huge_page_shift(struct hstate *h) | |
263 | { | |
264 | return h->order + PAGE_SHIFT; | |
265 | } | |
266 | ||
267 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
268 | { | |
269 | return 1 << h->order; | |
270 | } | |
271 | ||
272 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
273 | { | |
274 | return huge_page_size(h) / 512; | |
275 | } | |
276 | ||
277 | #include <asm/hugetlb.h> | |
278 | ||
e5ff2159 AK |
279 | static inline struct hstate *page_hstate(struct page *page) |
280 | { | |
281 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
282 | } | |
283 | ||
aa50d3a7 AK |
284 | static inline unsigned hstate_index_to_shift(unsigned index) |
285 | { | |
286 | return hstates[index].order + PAGE_SHIFT; | |
287 | } | |
288 | ||
a5516438 AK |
289 | #else |
290 | struct hstate {}; | |
bf50bab2 | 291 | #define alloc_huge_page_node(h, nid) NULL |
53ba51d2 | 292 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
293 | #define hstate_file(f) NULL |
294 | #define hstate_vma(v) NULL | |
295 | #define hstate_inode(i) NULL | |
296 | #define huge_page_size(h) PAGE_SIZE | |
297 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 298 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 299 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
300 | #define huge_page_order(h) 0 |
301 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
302 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
303 | { | |
304 | return 1; | |
305 | } | |
aa50d3a7 | 306 | #define hstate_index_to_shift(index) 0 |
a5516438 AK |
307 | #endif |
308 | ||
1da177e4 | 309 | #endif /* _LINUX_HUGETLB_H */ |