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