Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4e950f6f AD |
4 | #include <linux/fs.h> |
5 | ||
1da177e4 LT |
6 | #ifdef CONFIG_HUGETLB_PAGE |
7 | ||
8 | #include <linux/mempolicy.h> | |
516dffdc | 9 | #include <linux/shm.h> |
63551ae0 | 10 | #include <asm/tlbflush.h> |
1da177e4 LT |
11 | |
12 | struct ctl_table; | |
353d5c30 | 13 | struct user_struct; |
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); |
1da177e4 | 23 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
a3d0c6aa | 24 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
396faf03 | 25 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 | 26 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
5b23dbe8 | 27 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
04f2cbe3 MG |
28 | void unmap_hugepage_range(struct vm_area_struct *, |
29 | unsigned long, unsigned long, struct page *); | |
30 | void __unmap_hugepage_range(struct vm_area_struct *, | |
31 | unsigned long, unsigned long, struct page *); | |
1da177e4 | 32 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
e1759c21 | 33 | void hugetlb_report_meminfo(struct seq_file *); |
1da177e4 | 34 | int hugetlb_report_node_meminfo(int, char *); |
1da177e4 | 35 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 | 36 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
788c7df4 | 37 | unsigned long address, unsigned int flags); |
a1e78772 | 38 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
5a6fe125 MG |
39 | struct vm_area_struct *vma, |
40 | int acctflags); | |
a43a8c39 | 41 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
1da177e4 | 42 | |
396faf03 | 43 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
44 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
45 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 46 | extern struct list_head huge_boot_pages; |
1da177e4 | 47 | |
63551ae0 DG |
48 | /* arch callbacks */ |
49 | ||
a5516438 AK |
50 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
51 | unsigned long addr, unsigned long sz); | |
63551ae0 | 52 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 53 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
54 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
55 | int write); | |
56 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
57 | pmd_t *pmd, int write); | |
ceb86879 AK |
58 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
59 | pud_t *pud, int write); | |
63551ae0 | 60 | int pmd_huge(pmd_t pmd); |
ceb86879 | 61 | int pud_huge(pud_t pmd); |
8f860591 ZY |
62 | void hugetlb_change_protection(struct vm_area_struct *vma, |
63 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 64 | |
1da177e4 LT |
65 | #else /* !CONFIG_HUGETLB_PAGE */ |
66 | ||
20a0307c WF |
67 | static inline int PageHuge(struct page *page) |
68 | { | |
69 | return 0; | |
70 | } | |
71 | ||
1da177e4 LT |
72 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
73 | { | |
74 | return 0; | |
75 | } | |
a1e78772 MG |
76 | |
77 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
78 | { | |
79 | } | |
80 | ||
1da177e4 LT |
81 | static inline unsigned long hugetlb_total_pages(void) |
82 | { | |
83 | return 0; | |
84 | } | |
85 | ||
5b23dbe8 | 86 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
87 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
88 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
89 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
04f2cbe3 | 90 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
e1759c21 AD |
91 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
92 | { | |
93 | } | |
1da177e4 LT |
94 | #define hugetlb_report_node_meminfo(n, buf) 0 |
95 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
ceb86879 | 96 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 97 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 98 | #define pmd_huge(x) 0 |
ceb86879 | 99 | #define pud_huge(x) 0 |
1da177e4 | 100 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 101 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
788c7df4 | 102 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
1da177e4 | 103 | |
8f860591 ZY |
104 | #define hugetlb_change_protection(vma, address, end, newprot) |
105 | ||
1da177e4 | 106 | #ifndef HPAGE_MASK |
51c6f666 RH |
107 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
108 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
109 | #endif |
110 | ||
111 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
112 | ||
113 | #ifdef CONFIG_HUGETLBFS | |
114 | struct hugetlbfs_config { | |
115 | uid_t uid; | |
116 | gid_t gid; | |
117 | umode_t mode; | |
118 | long nr_blocks; | |
119 | long nr_inodes; | |
a137e1cc | 120 | struct hstate *hstate; |
1da177e4 LT |
121 | }; |
122 | ||
123 | struct hugetlbfs_sb_info { | |
124 | long max_blocks; /* blocks allowed */ | |
125 | long free_blocks; /* blocks free */ | |
126 | long max_inodes; /* inodes allowed */ | |
127 | long free_inodes; /* inodes free */ | |
128 | spinlock_t stat_lock; | |
a137e1cc | 129 | struct hstate *hstate; |
1da177e4 LT |
130 | }; |
131 | ||
132 | ||
133 | struct hugetlbfs_inode_info { | |
134 | struct shared_policy policy; | |
135 | struct inode vfs_inode; | |
136 | }; | |
137 | ||
138 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
139 | { | |
140 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
141 | } | |
142 | ||
143 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
144 | { | |
145 | return sb->s_fs_info; | |
146 | } | |
147 | ||
4b6f5d20 | 148 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 149 | extern struct vm_operations_struct hugetlb_vm_ops; |
353d5c30 HD |
150 | struct file *hugetlb_file_setup(const char *name, size_t size, int acct, |
151 | struct user_struct **user); | |
9a119c05 AL |
152 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
153 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 LT |
154 | |
155 | static inline int is_file_hugepages(struct file *file) | |
156 | { | |
516dffdc AL |
157 | if (file->f_op == &hugetlbfs_file_operations) |
158 | return 1; | |
159 | if (is_file_shm_hugepages(file)) | |
160 | return 1; | |
161 | ||
162 | return 0; | |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline void set_file_hugepages(struct file *file) | |
166 | { | |
167 | file->f_op = &hugetlbfs_file_operations; | |
168 | } | |
169 | #else /* !CONFIG_HUGETLBFS */ | |
170 | ||
1db8508c SR |
171 | #define is_file_hugepages(file) 0 |
172 | #define set_file_hugepages(file) BUG() | |
353d5c30 | 173 | #define hugetlb_file_setup(name,size,acct,user) ERR_PTR(-ENOSYS) |
1da177e4 LT |
174 | |
175 | #endif /* !CONFIG_HUGETLBFS */ | |
176 | ||
d2ba27e8 AB |
177 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
178 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
179 | unsigned long len, unsigned long pgoff, | |
180 | unsigned long flags); | |
181 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
182 | ||
a5516438 AK |
183 | #ifdef CONFIG_HUGETLB_PAGE |
184 | ||
a3437870 | 185 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
186 | /* Defines one hugetlb page size */ |
187 | struct hstate { | |
188 | int hugetlb_next_nid; | |
189 | unsigned int order; | |
190 | unsigned long mask; | |
191 | unsigned long max_huge_pages; | |
192 | unsigned long nr_huge_pages; | |
193 | unsigned long free_huge_pages; | |
194 | unsigned long resv_huge_pages; | |
195 | unsigned long surplus_huge_pages; | |
196 | unsigned long nr_overcommit_huge_pages; | |
197 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
198 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
199 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
200 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
a3437870 | 201 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
202 | }; |
203 | ||
53ba51d2 JT |
204 | struct huge_bootmem_page { |
205 | struct list_head list; | |
206 | struct hstate *hstate; | |
207 | }; | |
208 | ||
209 | /* arch callback */ | |
210 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
211 | ||
e5ff2159 AK |
212 | void __init hugetlb_add_hstate(unsigned order); |
213 | struct hstate *size_to_hstate(unsigned long size); | |
214 | ||
215 | #ifndef HUGE_MAX_HSTATE | |
216 | #define HUGE_MAX_HSTATE 1 | |
217 | #endif | |
218 | ||
219 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
220 | extern unsigned int default_hstate_idx; | |
221 | ||
222 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 223 | |
a137e1cc | 224 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 225 | { |
a137e1cc AK |
226 | struct hugetlbfs_sb_info *hsb; |
227 | hsb = HUGETLBFS_SB(i->i_sb); | |
228 | return hsb->hstate; | |
a5516438 AK |
229 | } |
230 | ||
231 | static inline struct hstate *hstate_file(struct file *f) | |
232 | { | |
a137e1cc | 233 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
234 | } |
235 | ||
a137e1cc | 236 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 237 | { |
a137e1cc | 238 | return hstate_file(vma->vm_file); |
a5516438 AK |
239 | } |
240 | ||
241 | static inline unsigned long huge_page_size(struct hstate *h) | |
242 | { | |
243 | return (unsigned long)PAGE_SIZE << h->order; | |
244 | } | |
245 | ||
08fba699 MG |
246 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
247 | ||
3340289d MG |
248 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
249 | ||
a5516438 AK |
250 | static inline unsigned long huge_page_mask(struct hstate *h) |
251 | { | |
252 | return h->mask; | |
253 | } | |
254 | ||
255 | static inline unsigned int huge_page_order(struct hstate *h) | |
256 | { | |
257 | return h->order; | |
258 | } | |
259 | ||
260 | static inline unsigned huge_page_shift(struct hstate *h) | |
261 | { | |
262 | return h->order + PAGE_SHIFT; | |
263 | } | |
264 | ||
265 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
266 | { | |
267 | return 1 << h->order; | |
268 | } | |
269 | ||
270 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
271 | { | |
272 | return huge_page_size(h) / 512; | |
273 | } | |
274 | ||
275 | #include <asm/hugetlb.h> | |
276 | ||
e5ff2159 AK |
277 | static inline struct hstate *page_hstate(struct page *page) |
278 | { | |
279 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
280 | } | |
281 | ||
a5516438 AK |
282 | #else |
283 | struct hstate {}; | |
53ba51d2 | 284 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
285 | #define hstate_file(f) NULL |
286 | #define hstate_vma(v) NULL | |
287 | #define hstate_inode(i) NULL | |
288 | #define huge_page_size(h) PAGE_SIZE | |
289 | #define huge_page_mask(h) PAGE_MASK | |
08fba699 | 290 | #define vma_kernel_pagesize(v) PAGE_SIZE |
3340289d | 291 | #define vma_mmu_pagesize(v) PAGE_SIZE |
a5516438 AK |
292 | #define huge_page_order(h) 0 |
293 | #define huge_page_shift(h) PAGE_SHIFT | |
510a35d4 AR |
294 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
295 | { | |
296 | return 1; | |
297 | } | |
a5516438 AK |
298 | #endif |
299 | ||
1da177e4 | 300 | #endif /* _LINUX_HUGETLB_H */ |