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 | |
| 19 | int hugetlb_sysctl_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] | 20 | 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] | 21 | 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] | 22 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
Chen, Kenneth W | 502717f | 2006-10-11 01:20:46 -0700 | [diff] [blame] | 24 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
| 26 | int hugetlb_report_meminfo(char *); |
| 27 | int hugetlb_report_node_meminfo(int, char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | unsigned long hugetlb_total_pages(void); |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 29 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
| 30 | unsigned long address, int write_access); |
Chen, Kenneth W | a43a8c3 | 2006-06-23 02:03:15 -0700 | [diff] [blame] | 31 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
| 32 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | extern unsigned long max_huge_pages; |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 35 | extern unsigned long hugepages_treat_as_movable; |
Adam Litke | 54f9f80 | 2007-10-16 01:26:20 -0700 | [diff] [blame] | 36 | extern int hugetlb_dynamic_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 38 | extern int sysctl_hugetlb_shm_group; |
| 39 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 40 | /* arch callbacks */ |
| 41 | |
| 42 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); |
| 43 | 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] | 44 | 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] | 45 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
| 46 | int write); |
| 47 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 48 | pmd_t *pmd, int write); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 49 | int pmd_huge(pmd_t pmd); |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 50 | void hugetlb_change_protection(struct vm_area_struct *vma, |
| 51 | unsigned long address, unsigned long end, pgprot_t newprot); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
| 54 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 55 | #endif |
| 56 | |
| 57 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE |
| 58 | #define hugetlb_free_pgd_range free_pgd_range |
David Gibson | 3915bcf | 2006-03-22 00:08:59 -0800 | [diff] [blame] | 59 | #else |
| 60 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, |
| 61 | unsigned long end, unsigned long floor, |
| 62 | unsigned long ceiling); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #endif |
| 64 | |
| 65 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE |
David Gibson | 42b88be | 2006-03-22 00:09:01 -0800 | [diff] [blame] | 66 | /* |
| 67 | * If the arch doesn't supply something else, assume that hugepage |
| 68 | * size aligned regions are ok without further preparation. |
| 69 | */ |
David Gibson | dec4ad8 | 2007-08-30 23:56:40 -0700 | [diff] [blame] | 70 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len) |
David Gibson | 42b88be | 2006-03-22 00:09:01 -0800 | [diff] [blame] | 71 | { |
| 72 | if (len & ~HPAGE_MASK) |
| 73 | return -EINVAL; |
| 74 | if (addr & ~HPAGE_MASK) |
| 75 | return -EINVAL; |
| 76 | return 0; |
| 77 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #else |
David Gibson | dec4ad8 | 2007-08-30 23:56:40 -0700 | [diff] [blame] | 79 | int prepare_hugepage_range(unsigned long addr, unsigned long len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #endif |
| 81 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 82 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
| 83 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) |
| 84 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) |
| 85 | #else |
| 86 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| 87 | pte_t *ptep, pte_t pte); |
| 88 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 89 | pte_t *ptep); |
| 90 | #endif |
| 91 | |
| 92 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK |
| 93 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) |
| 94 | #else |
| 95 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); |
| 96 | #endif |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 99 | |
| 100 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 101 | { |
| 102 | return 0; |
| 103 | } |
| 104 | static inline unsigned long hugetlb_total_pages(void) |
| 105 | { |
| 106 | return 0; |
| 107 | } |
| 108 | |
Adam Litke | 5b23dbe | 2007-11-14 16:59:33 -0800 | [diff] [blame] | 109 | #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] | 110 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 111 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 112 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | #define unmap_hugepage_range(vma, start, end) BUG() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #define hugetlb_report_meminfo(buf) 0 |
| 115 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 116 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
David Gibson | dec4ad8 | 2007-08-30 23:56:40 -0700 | [diff] [blame] | 117 | #define prepare_hugepage_range(addr,len) (-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #define pmd_huge(x) 0 |
| 119 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 120 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 121 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 123 | #define hugetlb_change_protection(vma, address, end, newprot) |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | #ifndef HPAGE_MASK |
Robin Holt | 51c6f66 | 2005-11-13 16:06:42 -0800 | [diff] [blame] | 126 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
| 127 | #define HPAGE_SIZE PAGE_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #endif |
| 129 | |
| 130 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 131 | |
| 132 | #ifdef CONFIG_HUGETLBFS |
| 133 | struct hugetlbfs_config { |
| 134 | uid_t uid; |
| 135 | gid_t gid; |
| 136 | umode_t mode; |
| 137 | long nr_blocks; |
| 138 | long nr_inodes; |
| 139 | }; |
| 140 | |
| 141 | struct hugetlbfs_sb_info { |
| 142 | long max_blocks; /* blocks allowed */ |
| 143 | long free_blocks; /* blocks free */ |
| 144 | long max_inodes; /* inodes allowed */ |
| 145 | long free_inodes; /* inodes free */ |
| 146 | spinlock_t stat_lock; |
| 147 | }; |
| 148 | |
| 149 | |
| 150 | struct hugetlbfs_inode_info { |
| 151 | struct shared_policy policy; |
| 152 | struct inode vfs_inode; |
| 153 | }; |
| 154 | |
| 155 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 156 | { |
| 157 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 158 | } |
| 159 | |
| 160 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 161 | { |
| 162 | return sb->s_fs_info; |
| 163 | } |
| 164 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 165 | extern const struct file_operations hugetlbfs_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | extern struct vm_operations_struct hugetlb_vm_ops; |
Eric W. Biederman | 9d66586 | 2007-06-16 10:16:16 -0700 | [diff] [blame] | 167 | struct file *hugetlb_file_setup(const char *name, size_t); |
Adam Litke | 9a119c0 | 2007-11-14 16:59:41 -0800 | [diff] [blame^] | 168 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
| 169 | void hugetlb_put_quota(struct address_space *mapping, long delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
| 171 | static inline int is_file_hugepages(struct file *file) |
| 172 | { |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 173 | if (file->f_op == &hugetlbfs_file_operations) |
| 174 | return 1; |
| 175 | if (is_file_shm_hugepages(file)) |
| 176 | return 1; |
| 177 | |
| 178 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | static inline void set_file_hugepages(struct file *file) |
| 182 | { |
| 183 | file->f_op = &hugetlbfs_file_operations; |
| 184 | } |
| 185 | #else /* !CONFIG_HUGETLBFS */ |
| 186 | |
| 187 | #define is_file_hugepages(file) 0 |
| 188 | #define set_file_hugepages(file) BUG() |
Eric W. Biederman | 9d66586 | 2007-06-16 10:16:16 -0700 | [diff] [blame] | 189 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | #endif /* !CONFIG_HUGETLBFS */ |
| 192 | |
Adrian Bunk | d2ba27e8 | 2007-05-06 14:49:00 -0700 | [diff] [blame] | 193 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| 194 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| 195 | unsigned long len, unsigned long pgoff, |
| 196 | unsigned long flags); |
| 197 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | #endif /* _LINUX_HUGETLB_H */ |