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