1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
4 #include <linux/mm_types.h>
6 #include <linux/hugetlb_inline.h>
7 #include <linux/cgroup.h>
13 #ifdef CONFIG_HUGETLB_PAGE
15 #include <linux/mempolicy.h>
16 #include <linux/shm.h>
17 #include <asm/tlbflush.h>
19 struct hugepage_subpool {
22 long max_hpages, used_hpages;
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)++)
30 struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
31 void hugepage_put_subpool(struct hugepage_subpool *spool);
33 int PageHuge(struct page *page);
34 int PageHeadHuge(struct page *page_head);
36 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
37 int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
38 int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
39 int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
42 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
43 void __user *, size_t *, loff_t *);
46 int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
47 long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
48 struct page **, struct vm_area_struct **,
49 unsigned long *, unsigned long *, long, unsigned int);
50 void unmap_hugepage_range(struct vm_area_struct *,
51 unsigned long, unsigned long, struct page *);
52 void __unmap_hugepage_range_final(struct mmu_gather *tlb,
53 struct vm_area_struct *vma,
54 unsigned long start, unsigned long end,
55 struct page *ref_page);
56 void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
57 unsigned long start, unsigned long end,
58 struct page *ref_page);
59 int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
60 void hugetlb_report_meminfo(struct seq_file *);
61 int hugetlb_report_node_meminfo(int, char *);
62 void hugetlb_show_meminfo(void);
63 unsigned long hugetlb_total_pages(void);
64 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
65 unsigned long address, unsigned int flags);
66 int hugetlb_reserve_pages(struct inode *inode, long from, long to,
67 struct vm_area_struct *vma,
69 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
70 int dequeue_hwpoisoned_huge_page(struct page *page);
71 void copy_huge_page(struct page *dst, struct page *src);
73 extern unsigned long hugepages_treat_as_movable;
74 extern const unsigned long hugetlb_zero, hugetlb_infinity;
75 extern int sysctl_hugetlb_shm_group;
76 extern struct list_head huge_boot_pages;
80 pte_t *huge_pte_alloc(struct mm_struct *mm,
81 unsigned long addr, unsigned long sz);
82 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
83 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
84 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
86 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
87 pmd_t *pmd, int write);
88 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
89 pud_t *pud, int write);
90 int pmd_huge(pmd_t pmd);
91 int pud_huge(pud_t pmd);
92 unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
93 unsigned long address, unsigned long end, pgprot_t newprot);
95 #else /* !CONFIG_HUGETLB_PAGE */
97 static inline int PageHuge(struct page *page)
102 static inline int PageHeadHuge(struct page *page_head)
107 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
111 static inline unsigned long hugetlb_total_pages(void)
116 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
117 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
118 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
119 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
120 static inline void hugetlb_report_meminfo(struct seq_file *m)
123 #define hugetlb_report_node_meminfo(n, buf) 0
124 static inline void hugetlb_show_meminfo(void)
127 #define follow_huge_pmd(mm, addr, pmd, write) NULL
128 #define follow_huge_pud(mm, addr, pud, write) NULL
129 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
130 #define pmd_huge(x) 0
131 #define pud_huge(x) 0
132 #define is_hugepage_only_range(mm, addr, len) 0
133 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
134 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
135 #define huge_pte_offset(mm, address) 0
136 static inline int dequeue_hwpoisoned_huge_page(struct page *page)
141 static inline void copy_huge_page(struct page *dst, struct page *src)
145 static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
146 unsigned long address, unsigned long end, pgprot_t newprot)
151 static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
152 struct vm_area_struct *vma, unsigned long start,
153 unsigned long end, struct page *ref_page)
158 static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
159 struct vm_area_struct *vma, unsigned long start,
160 unsigned long end, struct page *ref_page)
165 #endif /* !CONFIG_HUGETLB_PAGE */
167 #define HUGETLB_ANON_FILE "anon_hugepage"
171 * The file will be used as an shm file so shmfs accounting rules
174 HUGETLB_SHMFS_INODE = 1,
176 * The file is being created on the internal vfs mount and shmfs
177 * accounting rules do not apply
179 HUGETLB_ANONHUGE_INODE = 2,
182 #ifdef CONFIG_HUGETLBFS
183 struct hugetlbfs_sb_info {
184 long max_inodes; /* inodes allowed */
185 long free_inodes; /* inodes free */
186 spinlock_t stat_lock;
187 struct hstate *hstate;
188 struct hugepage_subpool *spool;
191 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
193 return sb->s_fs_info;
196 extern const struct file_operations hugetlbfs_file_operations;
197 extern const struct vm_operations_struct hugetlb_vm_ops;
198 struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
199 struct user_struct **user, int creat_flags,
202 static inline int is_file_hugepages(struct file *file)
204 if (file->f_op == &hugetlbfs_file_operations)
206 if (is_file_shm_hugepages(file))
213 #else /* !CONFIG_HUGETLBFS */
215 #define is_file_hugepages(file) 0
216 static inline struct file *
217 hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
218 struct user_struct **user, int creat_flags,
221 return ERR_PTR(-ENOSYS);
224 #endif /* !CONFIG_HUGETLBFS */
226 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
227 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
228 unsigned long len, unsigned long pgoff,
229 unsigned long flags);
230 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
232 #ifdef CONFIG_HUGETLB_PAGE
234 #define HSTATE_NAME_LEN 32
235 /* Defines one hugetlb page size */
237 int next_nid_to_alloc;
238 int next_nid_to_free;
241 unsigned long max_huge_pages;
242 unsigned long nr_huge_pages;
243 unsigned long free_huge_pages;
244 unsigned long resv_huge_pages;
245 unsigned long surplus_huge_pages;
246 unsigned long nr_overcommit_huge_pages;
247 struct list_head hugepage_activelist;
248 struct list_head hugepage_freelists[MAX_NUMNODES];
249 unsigned int nr_huge_pages_node[MAX_NUMNODES];
250 unsigned int free_huge_pages_node[MAX_NUMNODES];
251 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
252 #ifdef CONFIG_CGROUP_HUGETLB
253 /* cgroup control files */
254 struct cftype cgroup_files[5];
256 char name[HSTATE_NAME_LEN];
259 struct huge_bootmem_page {
260 struct list_head list;
261 struct hstate *hstate;
262 #ifdef CONFIG_HIGHMEM
267 struct page *alloc_huge_page_node(struct hstate *h, int nid);
270 int __init alloc_bootmem_huge_page(struct hstate *h);
272 void __init hugetlb_add_hstate(unsigned order);
273 struct hstate *size_to_hstate(unsigned long size);
275 #ifndef HUGE_MAX_HSTATE
276 #define HUGE_MAX_HSTATE 1
279 extern struct hstate hstates[HUGE_MAX_HSTATE];
280 extern unsigned int default_hstate_idx;
282 #define default_hstate (hstates[default_hstate_idx])
284 static inline struct hstate *hstate_inode(struct inode *i)
286 struct hugetlbfs_sb_info *hsb;
287 hsb = HUGETLBFS_SB(i->i_sb);
291 static inline struct hstate *hstate_file(struct file *f)
293 return hstate_inode(file_inode(f));
296 static inline struct hstate *hstate_sizelog(int page_size_log)
299 return &default_hstate;
300 return size_to_hstate(1 << page_size_log);
303 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
305 return hstate_file(vma->vm_file);
308 static inline unsigned long huge_page_size(struct hstate *h)
310 return (unsigned long)PAGE_SIZE << h->order;
313 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
315 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
317 static inline unsigned long huge_page_mask(struct hstate *h)
322 static inline unsigned int huge_page_order(struct hstate *h)
327 static inline unsigned huge_page_shift(struct hstate *h)
329 return h->order + PAGE_SHIFT;
332 static inline unsigned int pages_per_huge_page(struct hstate *h)
334 return 1 << h->order;
337 static inline unsigned int blocks_per_huge_page(struct hstate *h)
339 return huge_page_size(h) / 512;
342 #include <asm/hugetlb.h>
344 #ifndef arch_make_huge_pte
345 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
346 struct page *page, int writable)
352 static inline struct hstate *page_hstate(struct page *page)
354 return size_to_hstate(PAGE_SIZE << compound_order(page));
357 static inline unsigned hstate_index_to_shift(unsigned index)
359 return hstates[index].order + PAGE_SHIFT;
362 static inline int hstate_index(struct hstate *h)
367 pgoff_t __basepage_index(struct page *page);
369 /* Return page->index in PAGE_SIZE units */
370 static inline pgoff_t basepage_index(struct page *page)
372 if (!PageCompound(page))
375 return __basepage_index(page);
378 #else /* CONFIG_HUGETLB_PAGE */
380 #define alloc_huge_page_node(h, nid) NULL
381 #define alloc_bootmem_huge_page(h) NULL
382 #define hstate_file(f) NULL
383 #define hstate_sizelog(s) NULL
384 #define hstate_vma(v) NULL
385 #define hstate_inode(i) NULL
386 #define huge_page_size(h) PAGE_SIZE
387 #define huge_page_mask(h) PAGE_MASK
388 #define vma_kernel_pagesize(v) PAGE_SIZE
389 #define vma_mmu_pagesize(v) PAGE_SIZE
390 #define huge_page_order(h) 0
391 #define huge_page_shift(h) PAGE_SHIFT
392 static inline unsigned int pages_per_huge_page(struct hstate *h)
396 #define hstate_index_to_shift(index) 0
397 #define hstate_index(h) 0
399 static inline pgoff_t basepage_index(struct page *page)
403 #endif /* CONFIG_HUGETLB_PAGE */
405 #endif /* _LINUX_HUGETLB_H */