Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_HUGETLB_H |
| 2 | #define _LINUX_HUGETLB_H |
| 3 | |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 4 | #include <linux/fs.h> |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #ifdef CONFIG_HUGETLB_PAGE |
| 7 | |
| 8 | #include <linux/mempolicy.h> |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 9 | #include <linux/shm.h> |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 10 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
| 12 | struct ctl_table; |
| 13 | |
| 14 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 15 | { |
| 16 | return vma->vm_flags & VM_HUGETLB; |
| 17 | } |
| 18 | |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 19 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Nishanth Aravamudan | a3d0c6a | 2008-02-08 04:18:18 -0800 | [diff] [blame] | 21 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 22 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
Adam Litke | 5b23dbe | 2007-11-14 16:59:33 -0800 | [diff] [blame] | 24 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
Mel Gorman | 04f2cbe | 2008-07-23 21:27:25 -0700 | [diff] [blame] | 25 | void unmap_hugepage_range(struct vm_area_struct *, |
| 26 | unsigned long, unsigned long, struct page *); |
| 27 | void __unmap_hugepage_range(struct vm_area_struct *, |
| 28 | unsigned long, unsigned long, struct page *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
Alexey Dobriyan | e1759c2 | 2008-10-15 23:50:22 +0400 | [diff] [blame] | 30 | void hugetlb_report_meminfo(struct seq_file *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | int hugetlb_report_node_meminfo(int, char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | unsigned long hugetlb_total_pages(void); |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 33 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
| 34 | unsigned long address, int write_access); |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 35 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
Mel Gorman | 5a6fe12 | 2009-02-10 14:02:27 +0000 | [diff] [blame] | 36 | struct vm_area_struct *vma, |
| 37 | int acctflags); |
Chen, Kenneth W | a43a8c3 | 2006-06-23 02:03:15 -0700 | [diff] [blame] | 38 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 40 | extern unsigned long hugepages_treat_as_movable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 42 | extern int sysctl_hugetlb_shm_group; |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 43 | extern struct list_head huge_boot_pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 45 | /* arch callbacks */ |
| 46 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 47 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
| 48 | unsigned long addr, unsigned long sz); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 49 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
Chen, Kenneth W | 39dde65 | 2006-12-06 20:32:03 -0800 | [diff] [blame] | 50 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 51 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
| 52 | int write); |
| 53 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 54 | pmd_t *pmd, int write); |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 55 | struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, |
| 56 | pud_t *pud, int write); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 57 | int pmd_huge(pmd_t pmd); |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 58 | int pud_huge(pud_t pmd); |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 59 | void hugetlb_change_protection(struct vm_area_struct *vma, |
| 60 | unsigned long address, unsigned long end, pgprot_t newprot); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 63 | |
| 64 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 65 | { |
| 66 | return 0; |
| 67 | } |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 68 | |
| 69 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
| 70 | { |
| 71 | } |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | static inline unsigned long hugetlb_total_pages(void) |
| 74 | { |
| 75 | return 0; |
| 76 | } |
| 77 | |
Adam Litke | 5b23dbe | 2007-11-14 16:59:33 -0800 | [diff] [blame] | 78 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 80 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 81 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
Mel Gorman | 04f2cbe | 2008-07-23 21:27:25 -0700 | [diff] [blame] | 82 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
Alexey Dobriyan | e1759c2 | 2008-10-15 23:50:22 +0400 | [diff] [blame] | 83 | static inline void hugetlb_report_meminfo(struct seq_file *m) |
| 84 | { |
| 85 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 87 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 88 | #define follow_huge_pud(mm, addr, pud, write) NULL |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 89 | #define prepare_hugepage_range(file, addr, len) (-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | #define pmd_huge(x) 0 |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 91 | #define pud_huge(x) 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 93 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 94 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 96 | #define hugetlb_change_protection(vma, address, end, newprot) |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #ifndef HPAGE_MASK |
Robin Holt | 51c6f66 | 2005-11-13 16:06:42 -0800 | [diff] [blame] | 99 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
| 100 | #define HPAGE_SIZE PAGE_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #endif |
| 102 | |
| 103 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 104 | |
| 105 | #ifdef CONFIG_HUGETLBFS |
| 106 | struct hugetlbfs_config { |
| 107 | uid_t uid; |
| 108 | gid_t gid; |
| 109 | umode_t mode; |
| 110 | long nr_blocks; |
| 111 | long nr_inodes; |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 112 | struct hstate *hstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | struct hugetlbfs_sb_info { |
| 116 | long max_blocks; /* blocks allowed */ |
| 117 | long free_blocks; /* blocks free */ |
| 118 | long max_inodes; /* inodes allowed */ |
| 119 | long free_inodes; /* inodes free */ |
| 120 | spinlock_t stat_lock; |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 121 | struct hstate *hstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | |
| 125 | struct hugetlbfs_inode_info { |
| 126 | struct shared_policy policy; |
| 127 | struct inode vfs_inode; |
| 128 | }; |
| 129 | |
| 130 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 131 | { |
| 132 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 133 | } |
| 134 | |
| 135 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 136 | { |
| 137 | return sb->s_fs_info; |
| 138 | } |
| 139 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 140 | extern const struct file_operations hugetlbfs_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | extern struct vm_operations_struct hugetlb_vm_ops; |
Mel Gorman | 5a6fe12 | 2009-02-10 14:02:27 +0000 | [diff] [blame] | 142 | struct file *hugetlb_file_setup(const char *name, size_t, int); |
Adam Litke | 9a119c0 | 2007-11-14 16:59:41 -0800 | [diff] [blame] | 143 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
| 144 | void hugetlb_put_quota(struct address_space *mapping, long delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | static inline int is_file_hugepages(struct file *file) |
| 147 | { |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 148 | if (file->f_op == &hugetlbfs_file_operations) |
| 149 | return 1; |
| 150 | if (is_file_shm_hugepages(file)) |
| 151 | return 1; |
| 152 | |
| 153 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | static inline void set_file_hugepages(struct file *file) |
| 157 | { |
| 158 | file->f_op = &hugetlbfs_file_operations; |
| 159 | } |
| 160 | #else /* !CONFIG_HUGETLBFS */ |
| 161 | |
Stefan Richter | 1db8508 | 2009-02-10 23:27:32 +0100 | [diff] [blame^] | 162 | #define is_file_hugepages(file) 0 |
| 163 | #define set_file_hugepages(file) BUG() |
| 164 | #define hugetlb_file_setup(name,size,acctflag) ERR_PTR(-ENOSYS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | #endif /* !CONFIG_HUGETLBFS */ |
| 167 | |
Adrian Bunk | d2ba27e8 | 2007-05-06 14:49:00 -0700 | [diff] [blame] | 168 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| 169 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| 170 | unsigned long len, unsigned long pgoff, |
| 171 | unsigned long flags); |
| 172 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
| 173 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 174 | #ifdef CONFIG_HUGETLB_PAGE |
| 175 | |
Nishanth Aravamudan | a343787 | 2008-07-23 21:27:44 -0700 | [diff] [blame] | 176 | #define HSTATE_NAME_LEN 32 |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 177 | /* Defines one hugetlb page size */ |
| 178 | struct hstate { |
| 179 | int hugetlb_next_nid; |
| 180 | unsigned int order; |
| 181 | unsigned long mask; |
| 182 | unsigned long max_huge_pages; |
| 183 | unsigned long nr_huge_pages; |
| 184 | unsigned long free_huge_pages; |
| 185 | unsigned long resv_huge_pages; |
| 186 | unsigned long surplus_huge_pages; |
| 187 | unsigned long nr_overcommit_huge_pages; |
| 188 | struct list_head hugepage_freelists[MAX_NUMNODES]; |
| 189 | unsigned int nr_huge_pages_node[MAX_NUMNODES]; |
| 190 | unsigned int free_huge_pages_node[MAX_NUMNODES]; |
| 191 | unsigned int surplus_huge_pages_node[MAX_NUMNODES]; |
Nishanth Aravamudan | a343787 | 2008-07-23 21:27:44 -0700 | [diff] [blame] | 192 | char name[HSTATE_NAME_LEN]; |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 195 | struct huge_bootmem_page { |
| 196 | struct list_head list; |
| 197 | struct hstate *hstate; |
| 198 | }; |
| 199 | |
| 200 | /* arch callback */ |
| 201 | int __init alloc_bootmem_huge_page(struct hstate *h); |
| 202 | |
Andi Kleen | e5ff215 | 2008-07-23 21:27:42 -0700 | [diff] [blame] | 203 | void __init hugetlb_add_hstate(unsigned order); |
| 204 | struct hstate *size_to_hstate(unsigned long size); |
| 205 | |
| 206 | #ifndef HUGE_MAX_HSTATE |
| 207 | #define HUGE_MAX_HSTATE 1 |
| 208 | #endif |
| 209 | |
| 210 | extern struct hstate hstates[HUGE_MAX_HSTATE]; |
| 211 | extern unsigned int default_hstate_idx; |
| 212 | |
| 213 | #define default_hstate (hstates[default_hstate_idx]) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 214 | |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 215 | static inline struct hstate *hstate_inode(struct inode *i) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 216 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 217 | struct hugetlbfs_sb_info *hsb; |
| 218 | hsb = HUGETLBFS_SB(i->i_sb); |
| 219 | return hsb->hstate; |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | static inline struct hstate *hstate_file(struct file *f) |
| 223 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 224 | return hstate_inode(f->f_dentry->d_inode); |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 227 | static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 228 | { |
Andi Kleen | a137e1c | 2008-07-23 21:27:43 -0700 | [diff] [blame] | 229 | return hstate_file(vma->vm_file); |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static inline unsigned long huge_page_size(struct hstate *h) |
| 233 | { |
| 234 | return (unsigned long)PAGE_SIZE << h->order; |
| 235 | } |
| 236 | |
Mel Gorman | 08fba69 | 2009-01-06 14:38:53 -0800 | [diff] [blame] | 237 | extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); |
| 238 | |
Mel Gorman | 3340289 | 2009-01-06 14:38:54 -0800 | [diff] [blame] | 239 | extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); |
| 240 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 241 | static inline unsigned long huge_page_mask(struct hstate *h) |
| 242 | { |
| 243 | return h->mask; |
| 244 | } |
| 245 | |
| 246 | static inline unsigned int huge_page_order(struct hstate *h) |
| 247 | { |
| 248 | return h->order; |
| 249 | } |
| 250 | |
| 251 | static inline unsigned huge_page_shift(struct hstate *h) |
| 252 | { |
| 253 | return h->order + PAGE_SHIFT; |
| 254 | } |
| 255 | |
| 256 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
| 257 | { |
| 258 | return 1 << h->order; |
| 259 | } |
| 260 | |
| 261 | static inline unsigned int blocks_per_huge_page(struct hstate *h) |
| 262 | { |
| 263 | return huge_page_size(h) / 512; |
| 264 | } |
| 265 | |
| 266 | #include <asm/hugetlb.h> |
| 267 | |
Andi Kleen | e5ff215 | 2008-07-23 21:27:42 -0700 | [diff] [blame] | 268 | static inline struct hstate *page_hstate(struct page *page) |
| 269 | { |
| 270 | return size_to_hstate(PAGE_SIZE << compound_order(page)); |
| 271 | } |
| 272 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 273 | #else |
| 274 | struct hstate {}; |
Jon Tollefson | 53ba51d | 2008-07-23 21:27:52 -0700 | [diff] [blame] | 275 | #define alloc_bootmem_huge_page(h) NULL |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 276 | #define hstate_file(f) NULL |
| 277 | #define hstate_vma(v) NULL |
| 278 | #define hstate_inode(i) NULL |
| 279 | #define huge_page_size(h) PAGE_SIZE |
| 280 | #define huge_page_mask(h) PAGE_MASK |
Mel Gorman | 08fba69 | 2009-01-06 14:38:53 -0800 | [diff] [blame] | 281 | #define vma_kernel_pagesize(v) PAGE_SIZE |
Mel Gorman | 3340289 | 2009-01-06 14:38:54 -0800 | [diff] [blame] | 282 | #define vma_mmu_pagesize(v) PAGE_SIZE |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 283 | #define huge_page_order(h) 0 |
| 284 | #define huge_page_shift(h) PAGE_SHIFT |
Andrea Righi | 510a35d | 2008-07-26 15:22:27 -0700 | [diff] [blame] | 285 | static inline unsigned int pages_per_huge_page(struct hstate *h) |
| 286 | { |
| 287 | return 1; |
| 288 | } |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 289 | #endif |
| 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | #endif /* _LINUX_HUGETLB_H */ |