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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 LT |
38 | |
39 | extern unsigned long max_huge_pages; | |
064d9efe | 40 | extern unsigned long sysctl_overcommit_huge_pages; |
396faf03 | 41 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
42 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
43 | extern int sysctl_hugetlb_shm_group; | |
44 | ||
63551ae0 DG |
45 | /* arch callbacks */ |
46 | ||
a5516438 AK |
47 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
48 | unsigned long addr, unsigned long sz); | |
63551ae0 | 49 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
39dde65c | 50 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
51 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
52 | int write); | |
53 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
54 | pmd_t *pmd, int write); | |
63551ae0 | 55 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
56 | void hugetlb_change_protection(struct vm_area_struct *vma, |
57 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 58 | |
1da177e4 LT |
59 | #else /* !CONFIG_HUGETLB_PAGE */ |
60 | ||
61 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
62 | { | |
63 | return 0; | |
64 | } | |
a1e78772 MG |
65 | |
66 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
67 | { | |
68 | } | |
69 | ||
1da177e4 LT |
70 | static inline unsigned long hugetlb_total_pages(void) |
71 | { | |
72 | return 0; | |
73 | } | |
74 | ||
5b23dbe8 | 75 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
76 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
77 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
78 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
04f2cbe3 | 79 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
1da177e4 LT |
80 | #define hugetlb_report_meminfo(buf) 0 |
81 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
82 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
a5516438 | 83 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
1da177e4 LT |
84 | #define pmd_huge(x) 0 |
85 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 86 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 87 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 88 | |
8f860591 ZY |
89 | #define hugetlb_change_protection(vma, address, end, newprot) |
90 | ||
1da177e4 | 91 | #ifndef HPAGE_MASK |
51c6f666 RH |
92 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
93 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
94 | #endif |
95 | ||
96 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
97 | ||
98 | #ifdef CONFIG_HUGETLBFS | |
99 | struct hugetlbfs_config { | |
100 | uid_t uid; | |
101 | gid_t gid; | |
102 | umode_t mode; | |
103 | long nr_blocks; | |
104 | long nr_inodes; | |
105 | }; | |
106 | ||
107 | struct hugetlbfs_sb_info { | |
108 | long max_blocks; /* blocks allowed */ | |
109 | long free_blocks; /* blocks free */ | |
110 | long max_inodes; /* inodes allowed */ | |
111 | long free_inodes; /* inodes free */ | |
112 | spinlock_t stat_lock; | |
113 | }; | |
114 | ||
115 | ||
116 | struct hugetlbfs_inode_info { | |
117 | struct shared_policy policy; | |
118 | struct inode vfs_inode; | |
119 | }; | |
120 | ||
121 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
122 | { | |
123 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
124 | } | |
125 | ||
126 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
127 | { | |
128 | return sb->s_fs_info; | |
129 | } | |
130 | ||
4b6f5d20 | 131 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 132 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 133 | struct file *hugetlb_file_setup(const char *name, size_t); |
9a119c05 AL |
134 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
135 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 LT |
136 | |
137 | static inline int is_file_hugepages(struct file *file) | |
138 | { | |
516dffdc AL |
139 | if (file->f_op == &hugetlbfs_file_operations) |
140 | return 1; | |
141 | if (is_file_shm_hugepages(file)) | |
142 | return 1; | |
143 | ||
144 | return 0; | |
1da177e4 LT |
145 | } |
146 | ||
147 | static inline void set_file_hugepages(struct file *file) | |
148 | { | |
149 | file->f_op = &hugetlbfs_file_operations; | |
150 | } | |
151 | #else /* !CONFIG_HUGETLBFS */ | |
152 | ||
153 | #define is_file_hugepages(file) 0 | |
154 | #define set_file_hugepages(file) BUG() | |
9d66586f | 155 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
1da177e4 LT |
156 | |
157 | #endif /* !CONFIG_HUGETLBFS */ | |
158 | ||
d2ba27e8 AB |
159 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
160 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
161 | unsigned long len, unsigned long pgoff, | |
162 | unsigned long flags); | |
163 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
164 | ||
a5516438 AK |
165 | #ifdef CONFIG_HUGETLB_PAGE |
166 | ||
167 | /* Defines one hugetlb page size */ | |
168 | struct hstate { | |
169 | int hugetlb_next_nid; | |
170 | unsigned int order; | |
171 | unsigned long mask; | |
172 | unsigned long max_huge_pages; | |
173 | unsigned long nr_huge_pages; | |
174 | unsigned long free_huge_pages; | |
175 | unsigned long resv_huge_pages; | |
176 | unsigned long surplus_huge_pages; | |
177 | unsigned long nr_overcommit_huge_pages; | |
178 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
179 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
180 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
181 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
182 | }; | |
183 | ||
184 | extern struct hstate default_hstate; | |
185 | ||
186 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) | |
187 | { | |
188 | return &default_hstate; | |
189 | } | |
190 | ||
191 | static inline struct hstate *hstate_file(struct file *f) | |
192 | { | |
193 | return &default_hstate; | |
194 | } | |
195 | ||
196 | static inline struct hstate *hstate_inode(struct inode *i) | |
197 | { | |
198 | return &default_hstate; | |
199 | } | |
200 | ||
201 | static inline unsigned long huge_page_size(struct hstate *h) | |
202 | { | |
203 | return (unsigned long)PAGE_SIZE << h->order; | |
204 | } | |
205 | ||
206 | static inline unsigned long huge_page_mask(struct hstate *h) | |
207 | { | |
208 | return h->mask; | |
209 | } | |
210 | ||
211 | static inline unsigned int huge_page_order(struct hstate *h) | |
212 | { | |
213 | return h->order; | |
214 | } | |
215 | ||
216 | static inline unsigned huge_page_shift(struct hstate *h) | |
217 | { | |
218 | return h->order + PAGE_SHIFT; | |
219 | } | |
220 | ||
221 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
222 | { | |
223 | return 1 << h->order; | |
224 | } | |
225 | ||
226 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
227 | { | |
228 | return huge_page_size(h) / 512; | |
229 | } | |
230 | ||
231 | #include <asm/hugetlb.h> | |
232 | ||
233 | #else | |
234 | struct hstate {}; | |
235 | #define hstate_file(f) NULL | |
236 | #define hstate_vma(v) NULL | |
237 | #define hstate_inode(i) NULL | |
238 | #define huge_page_size(h) PAGE_SIZE | |
239 | #define huge_page_mask(h) PAGE_MASK | |
240 | #define huge_page_order(h) 0 | |
241 | #define huge_page_shift(h) PAGE_SHIFT | |
242 | #define pages_per_huge_page(h) 1 | |
243 | #endif | |
244 | ||
1da177e4 | 245 | #endif /* _LINUX_HUGETLB_H */ |