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1 | #ifndef _LINUX_HUGETLB_H | |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4 | #include <linux/fs.h> | |
5 | ||
6 | struct ctl_table; | |
7 | struct user_struct; | |
8 | ||
9 | #ifdef CONFIG_HUGETLB_PAGE | |
10 | ||
11 | #include <linux/mempolicy.h> | |
12 | #include <linux/shm.h> | |
13 | #include <asm/tlbflush.h> | |
14 | ||
15 | int PageHuge(struct page *page); | |
16 | ||
17 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
18 | { | |
19 | return vma->vm_flags & VM_HUGETLB; | |
20 | } | |
21 | ||
22 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); | |
23 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
24 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
25 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); | |
26 | ||
27 | #ifdef CONFIG_NUMA | |
28 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, | |
29 | void __user *, size_t *, loff_t *); | |
30 | #endif | |
31 | ||
32 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); | |
33 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, | |
34 | struct page **, struct vm_area_struct **, | |
35 | unsigned long *, int *, int, unsigned int flags); | |
36 | void unmap_hugepage_range(struct vm_area_struct *, | |
37 | unsigned long, unsigned long, struct page *); | |
38 | void __unmap_hugepage_range(struct vm_area_struct *, | |
39 | unsigned long, unsigned long, struct page *); | |
40 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); | |
41 | void hugetlb_report_meminfo(struct seq_file *); | |
42 | int hugetlb_report_node_meminfo(int, char *); | |
43 | unsigned long hugetlb_total_pages(void); | |
44 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, | |
45 | unsigned long address, unsigned int flags); | |
46 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, | |
47 | struct vm_area_struct *vma, | |
48 | int acctflags); | |
49 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); | |
50 | ||
51 | extern unsigned long hugepages_treat_as_movable; | |
52 | extern const unsigned long hugetlb_zero, hugetlb_infinity; | |
53 | extern int sysctl_hugetlb_shm_group; | |
54 | extern struct list_head huge_boot_pages; | |
55 | ||
56 | /* arch callbacks */ | |
57 | ||
58 | pte_t *huge_pte_alloc(struct mm_struct *mm, | |
59 | unsigned long addr, unsigned long sz); | |
60 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
61 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); | |
62 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, | |
63 | int write); | |
64 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
65 | pmd_t *pmd, int write); | |
66 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, | |
67 | pud_t *pud, int write); | |
68 | int pmd_huge(pmd_t pmd); | |
69 | int pud_huge(pud_t pmd); | |
70 | void hugetlb_change_protection(struct vm_area_struct *vma, | |
71 | unsigned long address, unsigned long end, pgprot_t newprot); | |
72 | ||
73 | #else /* !CONFIG_HUGETLB_PAGE */ | |
74 | ||
75 | static inline int PageHuge(struct page *page) | |
76 | { | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) | |
86 | { | |
87 | } | |
88 | ||
89 | static inline unsigned long hugetlb_total_pages(void) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) | |
95 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
96 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
97 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
98 | #define unmap_hugepage_range(vma, start, end, page) BUG() | |
99 | static inline void hugetlb_report_meminfo(struct seq_file *m) | |
100 | { | |
101 | } | |
102 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
103 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
104 | #define follow_huge_pud(mm, addr, pud, write) NULL | |
105 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) | |
106 | #define pmd_huge(x) 0 | |
107 | #define pud_huge(x) 0 | |
108 | #define is_hugepage_only_range(mm, addr, len) 0 | |
109 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) | |
110 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) | |
111 | ||
112 | #define hugetlb_change_protection(vma, address, end, newprot) | |
113 | ||
114 | #ifndef HPAGE_MASK | |
115 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ | |
116 | #define HPAGE_SIZE PAGE_SIZE | |
117 | #endif | |
118 | ||
119 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
120 | ||
121 | #define HUGETLB_ANON_FILE "anon_hugepage" | |
122 | ||
123 | enum { | |
124 | /* | |
125 | * The file will be used as an shm file so shmfs accounting rules | |
126 | * apply | |
127 | */ | |
128 | HUGETLB_SHMFS_INODE = 1, | |
129 | /* | |
130 | * The file is being created on the internal vfs mount and shmfs | |
131 | * accounting rules do not apply | |
132 | */ | |
133 | HUGETLB_ANONHUGE_INODE = 2, | |
134 | }; | |
135 | ||
136 | #ifdef CONFIG_HUGETLBFS | |
137 | struct hugetlbfs_config { | |
138 | uid_t uid; | |
139 | gid_t gid; | |
140 | umode_t mode; | |
141 | long nr_blocks; | |
142 | long nr_inodes; | |
143 | struct hstate *hstate; | |
144 | }; | |
145 | ||
146 | struct hugetlbfs_sb_info { | |
147 | long max_blocks; /* blocks allowed */ | |
148 | long free_blocks; /* blocks free */ | |
149 | long max_inodes; /* inodes allowed */ | |
150 | long free_inodes; /* inodes free */ | |
151 | spinlock_t stat_lock; | |
152 | struct hstate *hstate; | |
153 | }; | |
154 | ||
155 | ||
156 | struct hugetlbfs_inode_info { | |
157 | struct shared_policy policy; | |
158 | struct inode vfs_inode; | |
159 | }; | |
160 | ||
161 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
162 | { | |
163 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
164 | } | |
165 | ||
166 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
167 | { | |
168 | return sb->s_fs_info; | |
169 | } | |
170 | ||
171 | extern const struct file_operations hugetlbfs_file_operations; | |
172 | extern const struct vm_operations_struct hugetlb_vm_ops; | |
173 | struct file *hugetlb_file_setup(const char *name, size_t size, int acct, | |
174 | struct user_struct **user, int creat_flags); | |
175 | int hugetlb_get_quota(struct address_space *mapping, long delta); | |
176 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
177 | ||
178 | static inline int is_file_hugepages(struct file *file) | |
179 | { | |
180 | if (file->f_op == &hugetlbfs_file_operations) | |
181 | return 1; | |
182 | if (is_file_shm_hugepages(file)) | |
183 | return 1; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline void set_file_hugepages(struct file *file) | |
189 | { | |
190 | file->f_op = &hugetlbfs_file_operations; | |
191 | } | |
192 | #else /* !CONFIG_HUGETLBFS */ | |
193 | ||
194 | #define is_file_hugepages(file) 0 | |
195 | #define set_file_hugepages(file) BUG() | |
196 | static inline struct file *hugetlb_file_setup(const char *name, size_t size, | |
197 | int acctflag, struct user_struct **user, int creat_flags) | |
198 | { | |
199 | return ERR_PTR(-ENOSYS); | |
200 | } | |
201 | ||
202 | #endif /* !CONFIG_HUGETLBFS */ | |
203 | ||
204 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
205 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
206 | unsigned long len, unsigned long pgoff, | |
207 | unsigned long flags); | |
208 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
209 | ||
210 | #ifdef CONFIG_HUGETLB_PAGE | |
211 | ||
212 | #define HSTATE_NAME_LEN 32 | |
213 | /* Defines one hugetlb page size */ | |
214 | struct hstate { | |
215 | int next_nid_to_alloc; | |
216 | int next_nid_to_free; | |
217 | unsigned int order; | |
218 | unsigned long mask; | |
219 | unsigned long max_huge_pages; | |
220 | unsigned long nr_huge_pages; | |
221 | unsigned long free_huge_pages; | |
222 | unsigned long resv_huge_pages; | |
223 | unsigned long surplus_huge_pages; | |
224 | unsigned long nr_overcommit_huge_pages; | |
225 | struct list_head hugepage_freelists[MAX_NUMNODES]; | |
226 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; | |
227 | unsigned int free_huge_pages_node[MAX_NUMNODES]; | |
228 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; | |
229 | char name[HSTATE_NAME_LEN]; | |
230 | }; | |
231 | ||
232 | struct huge_bootmem_page { | |
233 | struct list_head list; | |
234 | struct hstate *hstate; | |
235 | }; | |
236 | ||
237 | /* arch callback */ | |
238 | int __init alloc_bootmem_huge_page(struct hstate *h); | |
239 | ||
240 | void __init hugetlb_add_hstate(unsigned order); | |
241 | struct hstate *size_to_hstate(unsigned long size); | |
242 | ||
243 | #ifndef HUGE_MAX_HSTATE | |
244 | #define HUGE_MAX_HSTATE 1 | |
245 | #endif | |
246 | ||
247 | extern struct hstate hstates[HUGE_MAX_HSTATE]; | |
248 | extern unsigned int default_hstate_idx; | |
249 | ||
250 | #define default_hstate (hstates[default_hstate_idx]) | |
251 | ||
252 | static inline struct hstate *hstate_inode(struct inode *i) | |
253 | { | |
254 | struct hugetlbfs_sb_info *hsb; | |
255 | hsb = HUGETLBFS_SB(i->i_sb); | |
256 | return hsb->hstate; | |
257 | } | |
258 | ||
259 | static inline struct hstate *hstate_file(struct file *f) | |
260 | { | |
261 | return hstate_inode(f->f_dentry->d_inode); | |
262 | } | |
263 | ||
264 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) | |
265 | { | |
266 | return hstate_file(vma->vm_file); | |
267 | } | |
268 | ||
269 | static inline unsigned long huge_page_size(struct hstate *h) | |
270 | { | |
271 | return (unsigned long)PAGE_SIZE << h->order; | |
272 | } | |
273 | ||
274 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); | |
275 | ||
276 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); | |
277 | ||
278 | static inline unsigned long huge_page_mask(struct hstate *h) | |
279 | { | |
280 | return h->mask; | |
281 | } | |
282 | ||
283 | static inline unsigned int huge_page_order(struct hstate *h) | |
284 | { | |
285 | return h->order; | |
286 | } | |
287 | ||
288 | static inline unsigned huge_page_shift(struct hstate *h) | |
289 | { | |
290 | return h->order + PAGE_SHIFT; | |
291 | } | |
292 | ||
293 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
294 | { | |
295 | return 1 << h->order; | |
296 | } | |
297 | ||
298 | static inline unsigned int blocks_per_huge_page(struct hstate *h) | |
299 | { | |
300 | return huge_page_size(h) / 512; | |
301 | } | |
302 | ||
303 | #include <asm/hugetlb.h> | |
304 | ||
305 | static inline struct hstate *page_hstate(struct page *page) | |
306 | { | |
307 | return size_to_hstate(PAGE_SIZE << compound_order(page)); | |
308 | } | |
309 | ||
310 | #else | |
311 | struct hstate {}; | |
312 | #define alloc_bootmem_huge_page(h) NULL | |
313 | #define hstate_file(f) NULL | |
314 | #define hstate_vma(v) NULL | |
315 | #define hstate_inode(i) NULL | |
316 | #define huge_page_size(h) PAGE_SIZE | |
317 | #define huge_page_mask(h) PAGE_MASK | |
318 | #define vma_kernel_pagesize(v) PAGE_SIZE | |
319 | #define vma_mmu_pagesize(v) PAGE_SIZE | |
320 | #define huge_page_order(h) 0 | |
321 | #define huge_page_shift(h) PAGE_SHIFT | |
322 | static inline unsigned int pages_per_huge_page(struct hstate *h) | |
323 | { | |
324 | return 1; | |
325 | } | |
326 | #endif | |
327 | ||
328 | #endif /* _LINUX_HUGETLB_H */ |