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1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H |
3 | |
4 | #include <linux/mm_types.h> |
5 | #include <linux/fs.h> |
6 | #include <linux/hugetlb_inline.h> |
7 | #include <linux/cgroup.h> |
8 | |
9 | struct ctl_table; |
10 | struct user_struct; |
11 | struct mmu_gather; |
12 | |
13 | #ifdef CONFIG_HUGETLB_PAGE |
14 | |
15 | #include <linux/mempolicy.h> |
16 | #include <linux/shm.h> |
17 | #include <asm/tlbflush.h> |
18 | |
19 | struct hugepage_subpool { |
20 | spinlock_t lock; |
21 | long count; |
22 | long max_hpages, used_hpages; |
23 | }; |
24 | |
25 | extern spinlock_t hugetlb_lock; |
26 | extern int hugetlb_max_hstate __read_mostly; |
27 | #define for_each_hstate(h) \ |
28 | for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) |
29 | |
30 | struct hugepage_subpool *hugepage_new_subpool(long nr_blocks); |
31 | void hugepage_put_subpool(struct hugepage_subpool *spool); |
32 | |
33 | int PageHuge(struct page *page); |
34 | |
35 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
36 | int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
37 | int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
38 | int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); |
39 | |
40 | #ifdef CONFIG_NUMA |
41 | int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, |
42 | void __user *, size_t *, loff_t *); |
43 | #endif |
44 | |
45 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
46 | long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, |
47 | struct page **, struct vm_area_struct **, |
48 | unsigned long *, unsigned long *, long, unsigned int); |
49 | void unmap_hugepage_range(struct vm_area_struct *, |
50 | unsigned long, unsigned long, struct page *); |
51 | void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
52 | struct vm_area_struct *vma, |
53 | unsigned long start, unsigned long end, |
54 | struct page *ref_page); |
55 | void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, |
56 | unsigned long start, unsigned long end, |
57 | struct page *ref_page); |
58 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
59 | void hugetlb_report_meminfo(struct seq_file *); |
60 | int hugetlb_report_node_meminfo(int, char *); |
61 | unsigned long hugetlb_total_pages(void); |
62 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
63 | unsigned long address, unsigned int flags); |
64 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
65 | struct vm_area_struct *vma, |
66 | vm_flags_t vm_flags); |
67 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
68 | int dequeue_hwpoisoned_huge_page(struct page *page); |
69 | void copy_huge_page(struct page *dst, struct page *src); |
70 | |
71 | extern unsigned long hugepages_treat_as_movable; |
72 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
73 | extern int sysctl_hugetlb_shm_group; |
74 | extern struct list_head huge_boot_pages; |
75 | |
76 | /* arch callbacks */ |
77 | |
78 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
79 | unsigned long addr, unsigned long sz); |
80 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
81 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
82 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
83 | int write); |
84 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
85 | pmd_t *pmd, int write); |
86 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
87 | pud_t *pud, int write); |
88 | int pmd_huge(pmd_t pmd); |
89 | int pud_huge(pud_t pmd); |
90 | unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
91 | unsigned long address, unsigned long end, pgprot_t newprot); |
92 | |
93 | #else /* !CONFIG_HUGETLB_PAGE */ |
94 | |
95 | static inline int PageHuge(struct page *page) |
96 | { |
97 | return 0; |
98 | } |
99 | |
100 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
101 | { |
102 | } |
103 | |
104 | static inline unsigned long hugetlb_total_pages(void) |
105 | { |
106 | return 0; |
107 | } |
108 | |
109 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
110 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
111 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
112 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
113 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
114 | { |
115 | } |
116 | #define hugetlb_report_node_meminfo(n, buf) 0 |
117 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
118 | #define follow_huge_pud(mm, addr, pud, write) NULL |
119 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
120 | #define pmd_huge(x) 0 |
121 | #define pud_huge(x) 0 |
122 | #define is_hugepage_only_range(mm, addr, len) 0 |
123 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
124 | #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) |
125 | #define huge_pte_offset(mm, address) 0 |
126 | static inline int dequeue_hwpoisoned_huge_page(struct page *page) |
127 | { |
128 | return 0; |
129 | } |
130 | |
131 | static inline void copy_huge_page(struct page *dst, struct page *src) |
132 | { |
133 | } |
134 | |
135 | static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, |
136 | unsigned long address, unsigned long end, pgprot_t newprot) |
137 | { |
138 | return 0; |
139 | } |
140 | |
141 | static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, |
142 | struct vm_area_struct *vma, unsigned long start, |
143 | unsigned long end, struct page *ref_page) |
144 | { |
145 | BUG(); |
146 | } |
147 | |
148 | static inline void __unmap_hugepage_range(struct mmu_gather *tlb, |
149 | struct vm_area_struct *vma, unsigned long start, |
150 | unsigned long end, struct page *ref_page) |
151 | { |
152 | BUG(); |
153 | } |
154 | |
155 | #endif /* !CONFIG_HUGETLB_PAGE */ |
156 | |
157 | #define HUGETLB_ANON_FILE "anon_hugepage" |
158 | |
159 | enum { |
160 | /* |
161 | * The file will be used as an shm file so shmfs accounting rules |
162 | * apply |
163 | */ |
164 | HUGETLB_SHMFS_INODE = 1, |
165 | /* |
166 | * The file is being created on the internal vfs mount and shmfs |
167 | * accounting rules do not apply |
168 | */ |
169 | HUGETLB_ANONHUGE_INODE = 2, |
170 | }; |
171 | |
172 | #ifdef CONFIG_HUGETLBFS |
173 | struct hugetlbfs_sb_info { |
174 | long max_inodes; /* inodes allowed */ |
175 | long free_inodes; /* inodes free */ |
176 | spinlock_t stat_lock; |
177 | struct hstate *hstate; |
178 | struct hugepage_subpool *spool; |
179 | }; |
180 | |
181 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
182 | { |
183 | return sb->s_fs_info; |
184 | } |
185 | |
186 | extern const struct file_operations hugetlbfs_file_operations; |
187 | extern const struct vm_operations_struct hugetlb_vm_ops; |
188 | struct file *hugetlb_file_setup(const char *name, unsigned long addr, |
189 | size_t size, vm_flags_t acct, |
190 | struct user_struct **user, int creat_flags, |
191 | int page_size_log); |
192 | |
193 | static inline int is_file_hugepages(struct file *file) |
194 | { |
195 | if (file->f_op == &hugetlbfs_file_operations) |
196 | return 1; |
197 | if (is_file_shm_hugepages(file)) |
198 | return 1; |
199 | |
200 | return 0; |
201 | } |
202 | |
203 | |
204 | #else /* !CONFIG_HUGETLBFS */ |
205 | |
206 | #define is_file_hugepages(file) 0 |
207 | static inline struct file * |
208 | hugetlb_file_setup(const char *name, unsigned long addr, size_t size, |
209 | vm_flags_t acctflag, struct user_struct **user, int creat_flags, |
210 | int page_size_log) |
211 | { |
212 | return ERR_PTR(-ENOSYS); |
213 | } |
214 | |
215 | #endif /* !CONFIG_HUGETLBFS */ |
216 | |
217 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
218 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
219 | unsigned long len, unsigned long pgoff, |
220 | unsigned long flags); |
221 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
222 | |
223 | #ifdef CONFIG_HUGETLB_PAGE |
224 | |
225 | #define HSTATE_NAME_LEN 32 |
226 | /* Defines one hugetlb page size */ |
227 | struct hstate { |
228 | int next_nid_to_alloc; |
229 | int next_nid_to_free; |
230 | unsigned int order; |
231 | unsigned long mask; |
232 | unsigned long max_huge_pages; |
233 | unsigned long nr_huge_pages; |
234 | unsigned long free_huge_pages; |
235 | unsigned long resv_huge_pages; |
236 | unsigned long surplus_huge_pages; |
237 | unsigned long nr_overcommit_huge_pages; |
238 | struct list_head hugepage_activelist; |
239 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
240 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; |
241 | unsigned int free_huge_pages_node[MAX_NUMNODES]; |
242 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; |
243 | #ifdef CONFIG_CGROUP_HUGETLB |
244 | /* cgroup control files */ |
245 | struct cftype cgroup_files[5]; |
246 | #endif |
247 | char name[HSTATE_NAME_LEN]; |
248 | }; |
249 | |
250 | struct huge_bootmem_page { |
251 | struct list_head list; |
252 | struct hstate *hstate; |
253 | #ifdef CONFIG_HIGHMEM |
254 | phys_addr_t phys; |
255 | #endif |
256 | }; |
257 | |
258 | struct page *alloc_huge_page_node(struct hstate *h, int nid); |
259 | |
260 | /* arch callback */ |
261 | int __init alloc_bootmem_huge_page(struct hstate *h); |
262 | |
263 | void __init hugetlb_add_hstate(unsigned order); |
264 | struct hstate *size_to_hstate(unsigned long size); |
265 | |
266 | #ifndef HUGE_MAX_HSTATE |
267 | #define HUGE_MAX_HSTATE 1 |
268 | #endif |
269 | |
270 | extern struct hstate hstates[HUGE_MAX_HSTATE]; |
271 | extern unsigned int default_hstate_idx; |
272 | |
273 | #define default_hstate (hstates[default_hstate_idx]) |
274 | |
275 | static inline struct hstate *hstate_inode(struct inode *i) |
276 | { |
277 | struct hugetlbfs_sb_info *hsb; |
278 | hsb = HUGETLBFS_SB(i->i_sb); |
279 | return hsb->hstate; |
280 | } |
281 | |
282 | static inline struct hstate *hstate_file(struct file *f) |
283 | { |
284 | return hstate_inode(file_inode(f)); |
285 | } |
286 | |
287 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
288 | { |
289 | return hstate_file(vma->vm_file); |
290 | } |
291 | |
292 | static inline unsigned long huge_page_size(struct hstate *h) |
293 | { |
294 | return (unsigned long)PAGE_SIZE << h->order; |
295 | } |
296 | |
297 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
298 | |
299 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
300 | |
301 | static inline unsigned long huge_page_mask(struct hstate *h) |
302 | { |
303 | return h->mask; |
304 | } |
305 | |
306 | static inline unsigned int huge_page_order(struct hstate *h) |
307 | { |
308 | return h->order; |
309 | } |
310 | |
311 | static inline unsigned huge_page_shift(struct hstate *h) |
312 | { |
313 | return h->order + PAGE_SHIFT; |
314 | } |
315 | |
316 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
317 | { |
318 | return 1 << h->order; |
319 | } |
320 | |
321 | static inline unsigned int blocks_per_huge_page(struct hstate *h) |
322 | { |
323 | return huge_page_size(h) / 512; |
324 | } |
325 | |
326 | #include <asm/hugetlb.h> |
327 | |
328 | #ifndef arch_make_huge_pte |
329 | static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, |
330 | struct page *page, int writable) |
331 | { |
332 | return entry; |
333 | } |
334 | #endif |
335 | |
336 | static inline struct hstate *page_hstate(struct page *page) |
337 | { |
338 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
339 | } |
340 | |
341 | static inline unsigned hstate_index_to_shift(unsigned index) |
342 | { |
343 | return hstates[index].order + PAGE_SHIFT; |
344 | } |
345 | |
346 | static inline int hstate_index(struct hstate *h) |
347 | { |
348 | return h - hstates; |
349 | } |
350 | |
351 | #else |
352 | struct hstate {}; |
353 | #define alloc_huge_page_node(h, nid) NULL |
354 | #define alloc_bootmem_huge_page(h) NULL |
355 | #define hstate_file(f) NULL |
356 | #define hstate_vma(v) NULL |
357 | #define hstate_inode(i) NULL |
358 | #define huge_page_size(h) PAGE_SIZE |
359 | #define huge_page_mask(h) PAGE_MASK |
360 | #define vma_kernel_pagesize(v) PAGE_SIZE |
361 | #define vma_mmu_pagesize(v) PAGE_SIZE |
362 | #define huge_page_order(h) 0 |
363 | #define huge_page_shift(h) PAGE_SHIFT |
364 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
365 | { |
366 | return 1; |
367 | } |
368 | #define hstate_index_to_shift(index) 0 |
369 | #define hstate_index(h) 0 |
370 | #endif |
371 | |
372 | #endif /* _LINUX_HUGETLB_H */ |
373 |
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