hugetlb.h 7.9 KB

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  1. #ifndef _LINUX_HUGETLB_H
  2. #define _LINUX_HUGETLB_H
  3. #include <linux/fs.h>
  4. #ifdef CONFIG_HUGETLB_PAGE
  5. #include <linux/mempolicy.h>
  6. #include <linux/shm.h>
  7. #include <asm/tlbflush.h>
  8. struct ctl_table;
  9. static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
  10. {
  11. return vma->vm_flags & VM_HUGETLB;
  12. }
  13. void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
  14. int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
  15. int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
  16. int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
  17. int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
  18. int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int);
  19. void unmap_hugepage_range(struct vm_area_struct *,
  20. unsigned long, unsigned long, struct page *);
  21. void __unmap_hugepage_range(struct vm_area_struct *,
  22. unsigned long, unsigned long, struct page *);
  23. int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
  24. int hugetlb_report_meminfo(char *);
  25. int hugetlb_report_node_meminfo(int, char *);
  26. unsigned long hugetlb_total_pages(void);
  27. int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
  28. unsigned long address, int write_access);
  29. int hugetlb_reserve_pages(struct inode *inode, long from, long to,
  30. struct vm_area_struct *vma);
  31. void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
  32. extern unsigned long hugepages_treat_as_movable;
  33. extern const unsigned long hugetlb_zero, hugetlb_infinity;
  34. extern int sysctl_hugetlb_shm_group;
  35. extern struct list_head huge_boot_pages;
  36. /* arch callbacks */
  37. pte_t *huge_pte_alloc(struct mm_struct *mm,
  38. unsigned long addr, unsigned long sz);
  39. pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
  40. int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
  41. struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
  42. int write);
  43. struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
  44. pmd_t *pmd, int write);
  45. struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
  46. pud_t *pud, int write);
  47. int pmd_huge(pmd_t pmd);
  48. int pud_huge(pud_t pmd);
  49. void hugetlb_change_protection(struct vm_area_struct *vma,
  50. unsigned long address, unsigned long end, pgprot_t newprot);
  51. #else /* !CONFIG_HUGETLB_PAGE */
  52. static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
  53. {
  54. return 0;
  55. }
  56. static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
  57. {
  58. }
  59. static inline unsigned long hugetlb_total_pages(void)
  60. {
  61. return 0;
  62. }
  63. #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
  64. #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
  65. #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
  66. #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
  67. #define unmap_hugepage_range(vma, start, end, page) BUG()
  68. #define hugetlb_report_meminfo(buf) 0
  69. #define hugetlb_report_node_meminfo(n, buf) 0
  70. #define follow_huge_pmd(mm, addr, pmd, write) NULL
  71. #define follow_huge_pud(mm, addr, pud, write) NULL
  72. #define prepare_hugepage_range(file, addr, len) (-EINVAL)
  73. #define pmd_huge(x) 0
  74. #define pud_huge(x) 0
  75. #define is_hugepage_only_range(mm, addr, len) 0
  76. #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
  77. #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; })
  78. #define hugetlb_change_protection(vma, address, end, newprot)
  79. #ifndef HPAGE_MASK
  80. #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
  81. #define HPAGE_SIZE PAGE_SIZE
  82. #endif
  83. #endif /* !CONFIG_HUGETLB_PAGE */
  84. #ifdef CONFIG_HUGETLBFS
  85. struct hugetlbfs_config {
  86. uid_t uid;
  87. gid_t gid;
  88. umode_t mode;
  89. long nr_blocks;
  90. long nr_inodes;
  91. struct hstate *hstate;
  92. };
  93. struct hugetlbfs_sb_info {
  94. long max_blocks; /* blocks allowed */
  95. long free_blocks; /* blocks free */
  96. long max_inodes; /* inodes allowed */
  97. long free_inodes; /* inodes free */
  98. spinlock_t stat_lock;
  99. struct hstate *hstate;
  100. };
  101. struct hugetlbfs_inode_info {
  102. struct shared_policy policy;
  103. struct inode vfs_inode;
  104. };
  105. static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
  106. {
  107. return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
  108. }
  109. static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
  110. {
  111. return sb->s_fs_info;
  112. }
  113. extern const struct file_operations hugetlbfs_file_operations;
  114. extern struct vm_operations_struct hugetlb_vm_ops;
  115. struct file *hugetlb_file_setup(const char *name, size_t);
  116. int hugetlb_get_quota(struct address_space *mapping, long delta);
  117. void hugetlb_put_quota(struct address_space *mapping, long delta);
  118. static inline int is_file_hugepages(struct file *file)
  119. {
  120. if (file->f_op == &hugetlbfs_file_operations)
  121. return 1;
  122. if (is_file_shm_hugepages(file))
  123. return 1;
  124. return 0;
  125. }
  126. static inline void set_file_hugepages(struct file *file)
  127. {
  128. file->f_op = &hugetlbfs_file_operations;
  129. }
  130. #else /* !CONFIG_HUGETLBFS */
  131. #define is_file_hugepages(file) 0
  132. #define set_file_hugepages(file) BUG()
  133. #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS)
  134. #endif /* !CONFIG_HUGETLBFS */
  135. #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
  136. unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
  137. unsigned long len, unsigned long pgoff,
  138. unsigned long flags);
  139. #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
  140. #ifdef CONFIG_HUGETLB_PAGE
  141. #define HSTATE_NAME_LEN 32
  142. /* Defines one hugetlb page size */
  143. struct hstate {
  144. int hugetlb_next_nid;
  145. unsigned int order;
  146. unsigned long mask;
  147. unsigned long max_huge_pages;
  148. unsigned long nr_huge_pages;
  149. unsigned long free_huge_pages;
  150. unsigned long resv_huge_pages;
  151. unsigned long surplus_huge_pages;
  152. unsigned long nr_overcommit_huge_pages;
  153. struct list_head hugepage_freelists[MAX_NUMNODES];
  154. unsigned int nr_huge_pages_node[MAX_NUMNODES];
  155. unsigned int free_huge_pages_node[MAX_NUMNODES];
  156. unsigned int surplus_huge_pages_node[MAX_NUMNODES];
  157. char name[HSTATE_NAME_LEN];
  158. };
  159. struct huge_bootmem_page {
  160. struct list_head list;
  161. struct hstate *hstate;
  162. };
  163. /* arch callback */
  164. int __init alloc_bootmem_huge_page(struct hstate *h);
  165. void __init hugetlb_add_hstate(unsigned order);
  166. struct hstate *size_to_hstate(unsigned long size);
  167. #ifndef HUGE_MAX_HSTATE
  168. #define HUGE_MAX_HSTATE 1
  169. #endif
  170. extern struct hstate hstates[HUGE_MAX_HSTATE];
  171. extern unsigned int default_hstate_idx;
  172. #define default_hstate (hstates[default_hstate_idx])
  173. static inline struct hstate *hstate_inode(struct inode *i)
  174. {
  175. struct hugetlbfs_sb_info *hsb;
  176. hsb = HUGETLBFS_SB(i->i_sb);
  177. return hsb->hstate;
  178. }
  179. static inline struct hstate *hstate_file(struct file *f)
  180. {
  181. return hstate_inode(f->f_dentry->d_inode);
  182. }
  183. static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
  184. {
  185. return hstate_file(vma->vm_file);
  186. }
  187. static inline unsigned long huge_page_size(struct hstate *h)
  188. {
  189. return (unsigned long)PAGE_SIZE << h->order;
  190. }
  191. static inline unsigned long huge_page_mask(struct hstate *h)
  192. {
  193. return h->mask;
  194. }
  195. static inline unsigned int huge_page_order(struct hstate *h)
  196. {
  197. return h->order;
  198. }
  199. static inline unsigned huge_page_shift(struct hstate *h)
  200. {
  201. return h->order + PAGE_SHIFT;
  202. }
  203. static inline unsigned int pages_per_huge_page(struct hstate *h)
  204. {
  205. return 1 << h->order;
  206. }
  207. static inline unsigned int blocks_per_huge_page(struct hstate *h)
  208. {
  209. return huge_page_size(h) / 512;
  210. }
  211. #include <asm/hugetlb.h>
  212. static inline struct hstate *page_hstate(struct page *page)
  213. {
  214. return size_to_hstate(PAGE_SIZE << compound_order(page));
  215. }
  216. #else
  217. struct hstate {};
  218. #define alloc_bootmem_huge_page(h) NULL
  219. #define hstate_file(f) NULL
  220. #define hstate_vma(v) NULL
  221. #define hstate_inode(i) NULL
  222. #define huge_page_size(h) PAGE_SIZE
  223. #define huge_page_mask(h) PAGE_MASK
  224. #define huge_page_order(h) 0
  225. #define huge_page_shift(h) PAGE_SHIFT
  226. static inline unsigned int pages_per_huge_page(struct hstate *h)
  227. {
  228. return 1;
  229. }
  230. #endif
  231. #endif /* _LINUX_HUGETLB_H */