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);
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 *);
41 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
42 void __user *, size_t *, loff_t *);
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 void hugetlb_show_meminfo(void);
62 unsigned long hugetlb_total_pages(void);
63 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
64 unsigned long address, unsigned int flags);
65 int hugetlb_reserve_pages(struct inode *inode, long from, long to,
66 struct vm_area_struct *vma,
68 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
69 int dequeue_hwpoisoned_huge_page(struct page *page);
70 void copy_huge_page(struct page *dst, struct page *src);
72 extern unsigned long hugepages_treat_as_movable;
73 extern const unsigned long hugetlb_zero, hugetlb_infinity;
74 extern int sysctl_hugetlb_shm_group;
75 extern struct list_head huge_boot_pages;
79 pte_t *huge_pte_alloc(struct mm_struct *mm,
80 unsigned long addr, unsigned long sz);
81 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
82 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
83 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
85 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
86 pmd_t *pmd, int write);
87 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
88 pud_t *pud, int write);
89 int pmd_huge(pmd_t pmd);
90 int pud_huge(pud_t pmd);
91 unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
92 unsigned long address, unsigned long end, pgprot_t newprot);
94 #else /* !CONFIG_HUGETLB_PAGE */
96 static inline int PageHuge(struct page *page)
101 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
105 static inline unsigned long hugetlb_total_pages(void)
110 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
111 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
112 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
113 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
114 static inline void hugetlb_report_meminfo(struct seq_file *m)
117 #define hugetlb_report_node_meminfo(n, buf) 0
118 static inline void hugetlb_show_meminfo(void)
121 #define follow_huge_pmd(mm, addr, pmd, write) NULL
122 #define follow_huge_pud(mm, addr, pud, write) NULL
123 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
124 #define pmd_huge(x) 0
125 #define pud_huge(x) 0
126 #define is_hugepage_only_range(mm, addr, len) 0
127 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
128 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
129 #define huge_pte_offset(mm, address) 0
130 static inline int dequeue_hwpoisoned_huge_page(struct page *page)
135 static inline void copy_huge_page(struct page *dst, struct page *src)
139 static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
140 unsigned long address, unsigned long end, pgprot_t newprot)
145 static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
146 struct vm_area_struct *vma, unsigned long start,
147 unsigned long end, struct page *ref_page)
152 static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
153 struct vm_area_struct *vma, unsigned long start,
154 unsigned long end, struct page *ref_page)
159 #endif /* !CONFIG_HUGETLB_PAGE */
161 #define HUGETLB_ANON_FILE "anon_hugepage"
165 * The file will be used as an shm file so shmfs accounting rules
168 HUGETLB_SHMFS_INODE = 1,
170 * The file is being created on the internal vfs mount and shmfs
171 * accounting rules do not apply
173 HUGETLB_ANONHUGE_INODE = 2,
176 #ifdef CONFIG_HUGETLBFS
177 struct hugetlbfs_sb_info {
178 long max_inodes; /* inodes allowed */
179 long free_inodes; /* inodes free */
180 spinlock_t stat_lock;
181 struct hstate *hstate;
182 struct hugepage_subpool *spool;
185 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
187 return sb->s_fs_info;
190 extern const struct file_operations hugetlbfs_file_operations;
191 extern const struct vm_operations_struct hugetlb_vm_ops;
192 struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
193 struct user_struct **user, int creat_flags,
196 static inline int is_file_hugepages(struct file *file)
198 if (file->f_op == &hugetlbfs_file_operations)
200 if (is_file_shm_hugepages(file))
207 #else /* !CONFIG_HUGETLBFS */
209 #define is_file_hugepages(file) 0
210 static inline struct file *
211 hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
212 struct user_struct **user, int creat_flags,
215 return ERR_PTR(-ENOSYS);
218 #endif /* !CONFIG_HUGETLBFS */
220 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
221 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
222 unsigned long len, unsigned long pgoff,
223 unsigned long flags);
224 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
226 #ifdef CONFIG_HUGETLB_PAGE
228 #define HSTATE_NAME_LEN 32
229 /* Defines one hugetlb page size */
231 int next_nid_to_alloc;
232 int next_nid_to_free;
235 unsigned long max_huge_pages;
236 unsigned long nr_huge_pages;
237 unsigned long free_huge_pages;
238 unsigned long resv_huge_pages;
239 unsigned long surplus_huge_pages;
240 unsigned long nr_overcommit_huge_pages;
241 struct list_head hugepage_activelist;
242 struct list_head hugepage_freelists[MAX_NUMNODES];
243 unsigned int nr_huge_pages_node[MAX_NUMNODES];
244 unsigned int free_huge_pages_node[MAX_NUMNODES];
245 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
246 #ifdef CONFIG_CGROUP_HUGETLB
247 /* cgroup control files */
248 struct cftype cgroup_files[5];
250 char name[HSTATE_NAME_LEN];
253 struct huge_bootmem_page {
254 struct list_head list;
255 struct hstate *hstate;
256 #ifdef CONFIG_HIGHMEM
261 struct page *alloc_huge_page_node(struct hstate *h, int nid);
264 int __init alloc_bootmem_huge_page(struct hstate *h);
266 void __init hugetlb_add_hstate(unsigned order);
267 struct hstate *size_to_hstate(unsigned long size);
269 #ifndef HUGE_MAX_HSTATE
270 #define HUGE_MAX_HSTATE 1
273 extern struct hstate hstates[HUGE_MAX_HSTATE];
274 extern unsigned int default_hstate_idx;
276 #define default_hstate (hstates[default_hstate_idx])
278 static inline struct hstate *hstate_inode(struct inode *i)
280 struct hugetlbfs_sb_info *hsb;
281 hsb = HUGETLBFS_SB(i->i_sb);
285 static inline struct hstate *hstate_file(struct file *f)
287 return hstate_inode(file_inode(f));
290 static inline struct hstate *hstate_sizelog(int page_size_log)
293 return &default_hstate;
294 return size_to_hstate(1 << page_size_log);
297 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
299 return hstate_file(vma->vm_file);
302 static inline unsigned long huge_page_size(struct hstate *h)
304 return (unsigned long)PAGE_SIZE << h->order;
307 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
309 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
311 static inline unsigned long huge_page_mask(struct hstate *h)
316 static inline unsigned int huge_page_order(struct hstate *h)
321 static inline unsigned huge_page_shift(struct hstate *h)
323 return h->order + PAGE_SHIFT;
326 static inline unsigned int pages_per_huge_page(struct hstate *h)
328 return 1 << h->order;
331 static inline unsigned int blocks_per_huge_page(struct hstate *h)
333 return huge_page_size(h) / 512;
336 #include <asm/hugetlb.h>
338 #ifndef arch_make_huge_pte
339 static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
340 struct page *page, int writable)
346 static inline struct hstate *page_hstate(struct page *page)
348 return size_to_hstate(PAGE_SIZE << compound_order(page));
351 static inline unsigned hstate_index_to_shift(unsigned index)
353 return hstates[index].order + PAGE_SHIFT;
356 static inline int hstate_index(struct hstate *h)
361 #else /* CONFIG_HUGETLB_PAGE */
363 #define alloc_huge_page_node(h, nid) NULL
364 #define alloc_bootmem_huge_page(h) NULL
365 #define hstate_file(f) NULL
366 #define hstate_sizelog(s) NULL
367 #define hstate_vma(v) NULL
368 #define hstate_inode(i) NULL
369 #define huge_page_size(h) PAGE_SIZE
370 #define huge_page_mask(h) PAGE_MASK
371 #define vma_kernel_pagesize(v) PAGE_SIZE
372 #define vma_mmu_pagesize(v) PAGE_SIZE
373 #define huge_page_order(h) 0
374 #define huge_page_shift(h) PAGE_SHIFT
375 static inline unsigned int pages_per_huge_page(struct hstate *h)
379 #define hstate_index_to_shift(index) 0
380 #define hstate_index(h) 0
381 #endif /* CONFIG_HUGETLB_PAGE */
383 #endif /* _LINUX_HUGETLB_H */