1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
4 #include <linux/mm_types.h>
6 #include <linux/hugetlb_inline.h>
11 #ifdef CONFIG_HUGETLB_PAGE
13 #include <linux/mempolicy.h>
14 #include <linux/shm.h>
15 #include <asm/tlbflush.h>
17 int PageHuge(struct page *page);
19 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
20 int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
21 int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
22 int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
25 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
26 void __user *, size_t *, loff_t *);
29 int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
30 int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
31 struct page **, struct vm_area_struct **,
32 unsigned long *, int *, int, unsigned int flags);
33 void unmap_hugepage_range(struct vm_area_struct *,
34 unsigned long, unsigned long, struct page *);
35 void __unmap_hugepage_range(struct vm_area_struct *,
36 unsigned long, unsigned long, struct page *);
37 int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
38 void hugetlb_report_meminfo(struct seq_file *);
39 int hugetlb_report_node_meminfo(int, char *);
40 unsigned long hugetlb_total_pages(void);
41 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
42 unsigned long address, unsigned int flags);
43 int hugetlb_reserve_pages(struct inode *inode, long from, long to,
44 struct vm_area_struct *vma,
46 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
47 int dequeue_hwpoisoned_huge_page(struct page *page);
48 void copy_huge_page(struct page *dst, struct page *src);
50 extern unsigned long hugepages_treat_as_movable;
51 extern const unsigned long hugetlb_zero, hugetlb_infinity;
52 extern int sysctl_hugetlb_shm_group;
53 extern struct list_head huge_boot_pages;
57 pte_t *huge_pte_alloc(struct mm_struct *mm,
58 unsigned long addr, unsigned long sz);
59 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
60 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
61 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
63 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
64 pmd_t *pmd, int write);
65 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
66 pud_t *pud, int write);
67 int pmd_huge(pmd_t pmd);
68 int pud_huge(pud_t pmd);
69 void hugetlb_change_protection(struct vm_area_struct *vma,
70 unsigned long address, unsigned long end, pgprot_t newprot);
72 #else /* !CONFIG_HUGETLB_PAGE */
74 static inline int PageHuge(struct page *page)
79 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
83 static inline unsigned long hugetlb_total_pages(void)
88 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
89 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
90 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
91 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
92 #define unmap_hugepage_range(vma, start, end, page) BUG()
93 static inline void hugetlb_report_meminfo(struct seq_file *m)
96 #define hugetlb_report_node_meminfo(n, buf) 0
97 #define follow_huge_pmd(mm, addr, pmd, write) NULL
98 #define follow_huge_pud(mm, addr, pud, write) NULL
99 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
100 #define pmd_huge(x) 0
101 #define pud_huge(x) 0
102 #define is_hugepage_only_range(mm, addr, len) 0
103 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
104 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
105 #define huge_pte_offset(mm, address) 0
106 #define dequeue_hwpoisoned_huge_page(page) 0
107 static inline void copy_huge_page(struct page *dst, struct page *src)
111 #define hugetlb_change_protection(vma, address, end, newprot)
114 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
115 #define HPAGE_SIZE PAGE_SIZE
118 #endif /* !CONFIG_HUGETLB_PAGE */
120 #define HUGETLB_ANON_FILE "anon_hugepage"
124 * The file will be used as an shm file so shmfs accounting rules
127 HUGETLB_SHMFS_INODE = 1,
129 * The file is being created on the internal vfs mount and shmfs
130 * accounting rules do not apply
132 HUGETLB_ANONHUGE_INODE = 2,
135 #ifdef CONFIG_HUGETLBFS
136 struct hugetlbfs_config {
142 struct hstate *hstate;
145 struct hugetlbfs_sb_info {
146 long max_blocks; /* blocks allowed */
147 long free_blocks; /* blocks free */
148 long max_inodes; /* inodes allowed */
149 long free_inodes; /* inodes free */
150 spinlock_t stat_lock;
151 struct hstate *hstate;
155 struct hugetlbfs_inode_info {
156 struct shared_policy policy;
157 struct inode vfs_inode;
160 static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
162 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
165 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
167 return sb->s_fs_info;
170 extern const struct file_operations hugetlbfs_file_operations;
171 extern const struct vm_operations_struct hugetlb_vm_ops;
172 struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
173 struct user_struct **user, int creat_flags);
174 int hugetlb_get_quota(struct address_space *mapping, long delta);
175 void hugetlb_put_quota(struct address_space *mapping, long delta);
177 static inline int is_file_hugepages(struct file *file)
179 if (file->f_op == &hugetlbfs_file_operations)
181 if (is_file_shm_hugepages(file))
187 static inline void set_file_hugepages(struct file *file)
189 file->f_op = &hugetlbfs_file_operations;
191 #else /* !CONFIG_HUGETLBFS */
193 #define is_file_hugepages(file) 0
194 #define set_file_hugepages(file) BUG()
195 static inline struct file *hugetlb_file_setup(const char *name, size_t size,
196 vm_flags_t acctflag, struct user_struct **user, int creat_flags)
198 return ERR_PTR(-ENOSYS);
201 #endif /* !CONFIG_HUGETLBFS */
203 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
204 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
205 unsigned long len, unsigned long pgoff,
206 unsigned long flags);
207 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
209 #ifdef CONFIG_HUGETLB_PAGE
211 #define HSTATE_NAME_LEN 32
212 /* Defines one hugetlb page size */
214 int next_nid_to_alloc;
215 int next_nid_to_free;
218 unsigned long max_huge_pages;
219 unsigned long nr_huge_pages;
220 unsigned long free_huge_pages;
221 unsigned long resv_huge_pages;
222 unsigned long surplus_huge_pages;
223 unsigned long nr_overcommit_huge_pages;
224 struct list_head hugepage_freelists[MAX_NUMNODES];
225 unsigned int nr_huge_pages_node[MAX_NUMNODES];
226 unsigned int free_huge_pages_node[MAX_NUMNODES];
227 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
228 char name[HSTATE_NAME_LEN];
231 struct huge_bootmem_page {
232 struct list_head list;
233 struct hstate *hstate;
234 #ifdef CONFIG_HIGHMEM
239 struct page *alloc_huge_page_node(struct hstate *h, int nid);
242 int __init alloc_bootmem_huge_page(struct hstate *h);
244 void __init hugetlb_add_hstate(unsigned order);
245 struct hstate *size_to_hstate(unsigned long size);
247 #ifndef HUGE_MAX_HSTATE
248 #define HUGE_MAX_HSTATE 1
251 extern struct hstate hstates[HUGE_MAX_HSTATE];
252 extern unsigned int default_hstate_idx;
254 #define default_hstate (hstates[default_hstate_idx])
256 static inline struct hstate *hstate_inode(struct inode *i)
258 struct hugetlbfs_sb_info *hsb;
259 hsb = HUGETLBFS_SB(i->i_sb);
263 static inline struct hstate *hstate_file(struct file *f)
265 return hstate_inode(f->f_dentry->d_inode);
268 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
270 return hstate_file(vma->vm_file);
273 static inline unsigned long huge_page_size(struct hstate *h)
275 return (unsigned long)PAGE_SIZE << h->order;
278 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
280 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
282 static inline unsigned long huge_page_mask(struct hstate *h)
287 static inline unsigned int huge_page_order(struct hstate *h)
292 static inline unsigned huge_page_shift(struct hstate *h)
294 return h->order + PAGE_SHIFT;
297 static inline unsigned int pages_per_huge_page(struct hstate *h)
299 return 1 << h->order;
302 static inline unsigned int blocks_per_huge_page(struct hstate *h)
304 return huge_page_size(h) / 512;
307 #include <asm/hugetlb.h>
309 static inline struct hstate *page_hstate(struct page *page)
311 return size_to_hstate(PAGE_SIZE << compound_order(page));
314 static inline unsigned hstate_index_to_shift(unsigned index)
316 return hstates[index].order + PAGE_SHIFT;
321 #define alloc_huge_page_node(h, nid) NULL
322 #define alloc_bootmem_huge_page(h) NULL
323 #define hstate_file(f) NULL
324 #define hstate_vma(v) NULL
325 #define hstate_inode(i) NULL
326 #define huge_page_size(h) PAGE_SIZE
327 #define huge_page_mask(h) PAGE_MASK
328 #define vma_kernel_pagesize(v) PAGE_SIZE
329 #define vma_mmu_pagesize(v) PAGE_SIZE
330 #define huge_page_order(h) 0
331 #define huge_page_shift(h) PAGE_SHIFT
332 static inline unsigned int pages_per_huge_page(struct hstate *h)
336 #define hstate_index_to_shift(index) 0
339 #endif /* _LINUX_HUGETLB_H */