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Commit | Line | Data |
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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 | ||
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; | |
13 | ||
14 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
15 | { | |
16 | return vma->vm_flags & VM_HUGETLB; | |
17 | } | |
18 | ||
a1e78772 | 19 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
1da177e4 | 20 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
a3d0c6aa | 21 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
396faf03 | 22 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 | 23 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
5b23dbe8 | 24 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
04f2cbe3 MG |
25 | void unmap_hugepage_range(struct vm_area_struct *, |
26 | unsigned long, unsigned long, struct page *); | |
27 | void __unmap_hugepage_range(struct vm_area_struct *, | |
28 | unsigned long, unsigned long, struct page *); | |
1da177e4 LT |
29 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
30 | int hugetlb_report_meminfo(char *); | |
31 | int hugetlb_report_node_meminfo(int, char *); | |
1da177e4 | 32 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
33 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
34 | unsigned long address, int write_access); | |
a1e78772 MG |
35 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
36 | struct vm_area_struct *vma); | |
a43a8c39 | 37 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
1da177e4 | 38 | |
396faf03 | 39 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
40 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
41 | extern int sysctl_hugetlb_shm_group; | |
53ba51d2 | 42 | extern struct list_head huge_boot_pages; |
1da177e4 | 43 | |
63551ae0 DG |
44 | /* arch callbacks */ |
45 | ||
a5516438 AK |
46 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
47 | unsigned long addr, unsigned long sz); | |
63551ae0 | 48 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 49 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
50 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
51 | int write); | |
52 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
53 | pmd_t *pmd, int write); | |
ceb86879 AK |
54 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
55 | pud_t *pud, int write); | |
63551ae0 | 56 | int pmd_huge(pmd_t pmd); |
ceb86879 | 57 | int pud_huge(pud_t pmd); |
8f860591 ZY |
58 | void hugetlb_change_protection(struct vm_area_struct *vma, |
59 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 60 | |
1da177e4 LT |
61 | #else /* !CONFIG_HUGETLB_PAGE */ |
62 | ||
63 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
64 | { | |
65 | return 0; | |
66 | } | |
a1e78772 MG |
67 | |
68 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
69 | { | |
70 | } | |
71 | ||
1da177e4 LT |
72 | static inline unsigned long hugetlb_total_pages(void) |
73 | { | |
74 | return 0; | |
75 | } | |
76 | ||
5b23dbe8 | 77 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
78 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
79 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
80 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
04f2cbe3 | 81 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
1da177e4 LT |
82 | #define hugetlb_report_meminfo(buf) 0 |
83 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
84 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
ceb86879 | 85 | #define follow_huge_pud(mm, addr, pud, write) NULL |
a5516438 | 86 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 | 87 | #define pmd_huge(x) 0 |
ceb86879 | 88 | #define pud_huge(x) 0 |
1da177e4 | 89 | #define is_hugepage_only_range(mm, addr, len) 0 |
9da61aef | 90 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 91 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 92 | |
8f860591 ZY |
93 | #define hugetlb_change_protection(vma, address, end, newprot) |
94 | ||
1da177e4 | 95 | #ifndef HPAGE_MASK |
51c6f666 RH |
96 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
97 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
98 | #endif |
99 | ||
100 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
101 | ||
102 | #ifdef CONFIG_HUGETLBFS | |
103 | struct hugetlbfs_config { | |
104 | uid_t uid; | |
105 | gid_t gid; | |
106 | umode_t mode; | |
107 | long nr_blocks; | |
108 | long nr_inodes; | |
a137e1cc | 109 | struct hstate *hstate; |
1da177e4 LT |
110 | }; |
111 | ||
112 | struct hugetlbfs_sb_info { | |
113 | long max_blocks; /* blocks allowed */ | |
114 | long free_blocks; /* blocks free */ | |
115 | long max_inodes; /* inodes allowed */ | |
116 | long free_inodes; /* inodes free */ | |
117 | spinlock_t stat_lock; | |
a137e1cc | 118 | struct hstate *hstate; |
1da177e4 LT |
119 | }; |
120 | ||
121 | ||
122 | struct hugetlbfs_inode_info { | |
123 | struct shared_policy policy; | |
124 | struct inode vfs_inode; | |
125 | }; | |
126 | ||
127 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
128 | { | |
129 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
130 | } | |
131 | ||
132 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
133 | { | |
134 | return sb->s_fs_info; | |
135 | } | |
136 | ||
4b6f5d20 | 137 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 138 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 139 | struct file *hugetlb_file_setup(const char *name, size_t); |
9a119c05 AL |
140 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
141 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 LT |
142 | |
143 | static inline int is_file_hugepages(struct file *file) | |
144 | { | |
516dffdc AL |
145 | if (file->f_op == &hugetlbfs_file_operations) |
146 | return 1; | |
147 | if (is_file_shm_hugepages(file)) | |
148 | return 1; | |
149 | ||
150 | return 0; | |
1da177e4 LT |
151 | } |
152 | ||
153 | static inline void set_file_hugepages(struct file *file) | |
154 | { | |
155 | file->f_op = &hugetlbfs_file_operations; | |
156 | } | |
157 | #else /* !CONFIG_HUGETLBFS */ | |
158 | ||
159 | #define is_file_hugepages(file) 0 | |
160 | #define set_file_hugepages(file) BUG() | |
9d66586f | 161 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
1da177e4 LT |
162 | |
163 | #endif /* !CONFIG_HUGETLBFS */ | |
164 | ||
d2ba27e8 AB |
165 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
166 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
167 | unsigned long len, unsigned long pgoff, | |
168 | unsigned long flags); | |
169 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
170 | ||
a5516438 AK |
171 | #ifdef CONFIG_HUGETLB_PAGE |
172 | ||
a3437870 | 173 | #define HSTATE_NAME_LEN 32 |
a5516438 AK |
174 | /* Defines one hugetlb page size */ |
175 | struct hstate { | |
176 | int hugetlb_next_nid; | |
177 | unsigned int order; | |
178 | unsigned long mask; | |
179 | unsigned long max_huge_pages; | |
180 | unsigned long nr_huge_pages; | |
181 | unsigned long free_huge_pages; | |
182 | unsigned long resv_huge_pages; | |
183 | unsigned long surplus_huge_pages; | |
184 | unsigned long nr_overcommit_huge_pages; | |
185 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
186 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
187 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
188 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
a3437870 | 189 | char name[HSTATE_NAME_LEN]; |
a5516438 AK |
190 | }; |
191 | ||
53ba51d2 JT |
192 | struct huge_bootmem_page { |
193 | struct list_head list; | |
194 | struct hstate *hstate; | |
195 | }; | |
196 | ||
197 | /* arch callback */ | |
198 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
199 | ||
e5ff2159 AK |
200 | void __init hugetlb_add_hstate(unsigned order); |
201 | struct hstate *size_to_hstate(unsigned long size); | |
202 | ||
203 | #ifndef HUGE_MAX_HSTATE | |
204 | #define HUGE_MAX_HSTATE 1 | |
205 | #endif | |
206 | ||
207 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
208 | extern unsigned int default_hstate_idx; | |
209 | ||
210 | #define default_hstate (hstates[default_hstate_idx]) | |
a5516438 | 211 | |
a137e1cc | 212 | static inline struct hstate *hstate_inode(struct inode *i) |
a5516438 | 213 | { |
a137e1cc AK |
214 | struct hugetlbfs_sb_info *hsb; |
215 | hsb = HUGETLBFS_SB(i->i_sb); | |
216 | return hsb->hstate; | |
a5516438 AK |
217 | } |
218 | ||
219 | static inline struct hstate *hstate_file(struct file *f) | |
220 | { | |
a137e1cc | 221 | return hstate_inode(f->f_dentry->d_inode); |
a5516438 AK |
222 | } |
223 | ||
a137e1cc | 224 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
a5516438 | 225 | { |
a137e1cc | 226 | return hstate_file(vma->vm_file); |
a5516438 AK |
227 | } |
228 | ||
229 | static inline unsigned long huge_page_size(struct hstate *h) | |
230 | { | |
231 | return (unsigned long)PAGE_SIZE << h->order; | |
232 | } | |
233 | ||
234 | static inline unsigned long huge_page_mask(struct hstate *h) | |
235 | { | |
236 | return h->mask; | |
237 | } | |
238 | ||
239 | static inline unsigned int huge_page_order(struct hstate *h) | |
240 | { | |
241 | return h->order; | |
242 | } | |
243 | ||
244 | static inline unsigned huge_page_shift(struct hstate *h) | |
245 | { | |
246 | return h->order + PAGE_SHIFT; | |
247 | } | |
248 | ||
249 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
250 | { | |
251 | return 1 << h->order; | |
252 | } | |
253 | ||
254 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
255 | { | |
256 | return huge_page_size(h) / 512; | |
257 | } | |
258 | ||
259 | #include <asm/hugetlb.h> | |
260 | ||
e5ff2159 AK |
261 | static inline struct hstate *page_hstate(struct page *page) |
262 | { | |
263 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
264 | } | |
265 | ||
a5516438 AK |
266 | #else |
267 | struct hstate {}; | |
53ba51d2 | 268 | #define alloc_bootmem_huge_page(h) NULL |
a5516438 AK |
269 | #define hstate_file(f) NULL |
270 | #define hstate_vma(v) NULL | |
271 | #define hstate_inode(i) NULL | |
272 | #define huge_page_size(h) PAGE_SIZE | |
273 | #define huge_page_mask(h) PAGE_MASK | |
274 | #define huge_page_order(h) 0 | |
275 | #define huge_page_shift(h) PAGE_SHIFT | |
276 | #define pages_per_huge_page(h) 1 | |
277 | #endif | |
278 | ||
1da177e4 | 279 | #endif /* _LINUX_HUGETLB_H */ |