hugetlb.h 9.2 KB

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