1 #ifndef _LINUX_HUGETLB_H
2 #define _LINUX_HUGETLB_H
5 #include <linux/hugetlb_inline.h>
10 #ifdef CONFIG_HUGETLB_PAGE
12 #include <linux/mempolicy.h>
13 #include <linux/shm.h>
14 #include <asm/tlbflush.h>
16 int PageHuge(struct page *page);
18 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
19 int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
20 int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
21 int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
24 int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
25 void __user *, size_t *, loff_t *);
28 int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
29 int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
30 struct page **, struct vm_area_struct **,
31 unsigned long *, int *, int, unsigned int flags);
32 void unmap_hugepage_range(struct vm_area_struct *,
33 unsigned long, unsigned long, struct page *);
34 void __unmap_hugepage_range(struct vm_area_struct *,
35 unsigned long, unsigned long, struct page *);
36 int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
37 void hugetlb_report_meminfo(struct seq_file *);
38 int hugetlb_report_node_meminfo(int, char *);
39 unsigned long hugetlb_total_pages(void);
40 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
41 unsigned long address, unsigned int flags);
42 int hugetlb_reserve_pages(struct inode *inode, long from, long to,
43 struct vm_area_struct *vma,
45 void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
47 extern unsigned long hugepages_treat_as_movable;
48 extern const unsigned long hugetlb_zero, hugetlb_infinity;
49 extern int sysctl_hugetlb_shm_group;
50 extern struct list_head huge_boot_pages;
54 pte_t *huge_pte_alloc(struct mm_struct *mm,
55 unsigned long addr, unsigned long sz);
56 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
57 int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
58 struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
60 struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
61 pmd_t *pmd, int write);
62 struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
63 pud_t *pud, int write);
64 int pmd_huge(pmd_t pmd);
65 int pud_huge(pud_t pmd);
66 void hugetlb_change_protection(struct vm_area_struct *vma,
67 unsigned long address, unsigned long end, pgprot_t newprot);
69 #else /* !CONFIG_HUGETLB_PAGE */
71 static inline int PageHuge(struct page *page)
76 static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
80 static inline unsigned long hugetlb_total_pages(void)
85 #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; })
86 #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
87 #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
88 #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
89 #define unmap_hugepage_range(vma, start, end, page) BUG()
90 static inline void hugetlb_report_meminfo(struct seq_file *m)
93 #define hugetlb_report_node_meminfo(n, buf) 0
94 #define follow_huge_pmd(mm, addr, pmd, write) NULL
95 #define follow_huge_pud(mm, addr, pud, write) NULL
96 #define prepare_hugepage_range(file, addr, len) (-EINVAL)
99 #define is_hugepage_only_range(mm, addr, len) 0
100 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
101 #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
102 #define huge_pte_offset(mm, address) 0
104 #define hugetlb_change_protection(vma, address, end, newprot)
107 #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */
108 #define HPAGE_SIZE PAGE_SIZE
111 #endif /* !CONFIG_HUGETLB_PAGE */
113 #define HUGETLB_ANON_FILE "anon_hugepage"
117 * The file will be used as an shm file so shmfs accounting rules
120 HUGETLB_SHMFS_INODE = 1,
122 * The file is being created on the internal vfs mount and shmfs
123 * accounting rules do not apply
125 HUGETLB_ANONHUGE_INODE = 2,
128 #ifdef CONFIG_HUGETLBFS
129 struct hugetlbfs_config {
135 struct hstate *hstate;
138 struct hugetlbfs_sb_info {
139 long max_blocks; /* blocks allowed */
140 long free_blocks; /* blocks free */
141 long max_inodes; /* inodes allowed */
142 long free_inodes; /* inodes free */
143 spinlock_t stat_lock;
144 struct hstate *hstate;
148 struct hugetlbfs_inode_info {
149 struct shared_policy policy;
150 struct inode vfs_inode;
153 static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
155 return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
158 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
160 return sb->s_fs_info;
163 extern const struct file_operations hugetlbfs_file_operations;
164 extern const struct vm_operations_struct hugetlb_vm_ops;
165 struct file *hugetlb_file_setup(const char *name, size_t size, int acct,
166 struct user_struct **user, int creat_flags);
167 int hugetlb_get_quota(struct address_space *mapping, long delta);
168 void hugetlb_put_quota(struct address_space *mapping, long delta);
170 static inline int is_file_hugepages(struct file *file)
172 if (file->f_op == &hugetlbfs_file_operations)
174 if (is_file_shm_hugepages(file))
180 static inline void set_file_hugepages(struct file *file)
182 file->f_op = &hugetlbfs_file_operations;
184 #else /* !CONFIG_HUGETLBFS */
186 #define is_file_hugepages(file) 0
187 #define set_file_hugepages(file) BUG()
188 static inline struct file *hugetlb_file_setup(const char *name, size_t size,
189 int acctflag, struct user_struct **user, int creat_flags)
191 return ERR_PTR(-ENOSYS);
194 #endif /* !CONFIG_HUGETLBFS */
196 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
197 unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
198 unsigned long len, unsigned long pgoff,
199 unsigned long flags);
200 #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
202 #ifdef CONFIG_HUGETLB_PAGE
204 #define HSTATE_NAME_LEN 32
205 /* Defines one hugetlb page size */
207 int next_nid_to_alloc;
208 int next_nid_to_free;
211 unsigned long max_huge_pages;
212 unsigned long nr_huge_pages;
213 unsigned long free_huge_pages;
214 unsigned long resv_huge_pages;
215 unsigned long surplus_huge_pages;
216 unsigned long nr_overcommit_huge_pages;
217 struct list_head hugepage_freelists[MAX_NUMNODES];
218 unsigned int nr_huge_pages_node[MAX_NUMNODES];
219 unsigned int free_huge_pages_node[MAX_NUMNODES];
220 unsigned int surplus_huge_pages_node[MAX_NUMNODES];
221 char name[HSTATE_NAME_LEN];
224 struct huge_bootmem_page {
225 struct list_head list;
226 struct hstate *hstate;
230 int __init alloc_bootmem_huge_page(struct hstate *h);
232 void __init hugetlb_add_hstate(unsigned order);
233 struct hstate *size_to_hstate(unsigned long size);
235 #ifndef HUGE_MAX_HSTATE
236 #define HUGE_MAX_HSTATE 1
239 extern struct hstate hstates[HUGE_MAX_HSTATE];
240 extern unsigned int default_hstate_idx;
242 #define default_hstate (hstates[default_hstate_idx])
244 static inline struct hstate *hstate_inode(struct inode *i)
246 struct hugetlbfs_sb_info *hsb;
247 hsb = HUGETLBFS_SB(i->i_sb);
251 static inline struct hstate *hstate_file(struct file *f)
253 return hstate_inode(f->f_dentry->d_inode);
256 static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
258 return hstate_file(vma->vm_file);
261 static inline unsigned long huge_page_size(struct hstate *h)
263 return (unsigned long)PAGE_SIZE << h->order;
266 extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);
268 extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
270 static inline unsigned long huge_page_mask(struct hstate *h)
275 static inline unsigned int huge_page_order(struct hstate *h)
280 static inline unsigned huge_page_shift(struct hstate *h)
282 return h->order + PAGE_SHIFT;
285 static inline unsigned int pages_per_huge_page(struct hstate *h)
287 return 1 << h->order;
290 static inline unsigned int blocks_per_huge_page(struct hstate *h)
292 return huge_page_size(h) / 512;
295 #include <asm/hugetlb.h>
297 static inline struct hstate *page_hstate(struct page *page)
299 return size_to_hstate(PAGE_SIZE << compound_order(page));
304 #define alloc_bootmem_huge_page(h) NULL
305 #define hstate_file(f) NULL
306 #define hstate_vma(v) NULL
307 #define hstate_inode(i) NULL
308 #define huge_page_size(h) PAGE_SIZE
309 #define huge_page_mask(h) PAGE_MASK
310 #define vma_kernel_pagesize(v) PAGE_SIZE
311 #define vma_mmu_pagesize(v) PAGE_SIZE
312 #define huge_page_order(h) 0
313 #define huge_page_shift(h) PAGE_SHIFT
314 static inline unsigned int pages_per_huge_page(struct hstate *h)
320 #endif /* _LINUX_HUGETLB_H */