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> |
Gerald Schaefer | 6d77907 | 2008-04-28 02:13:27 -0700 | [diff] [blame] | 11 | #include <asm/hugetlb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | struct ctl_table; |
| 14 | |
| 15 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 16 | { |
| 17 | return vma->vm_flags & VM_HUGETLB; |
| 18 | } |
| 19 | |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 20 | void reset_vma_resv_huge_pages(struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | 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] | 22 | 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] | 23 | 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] | 24 | 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] | 25 | 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^] | 26 | void unmap_hugepage_range(struct vm_area_struct *, |
| 27 | unsigned long, unsigned long, struct page *); |
| 28 | void __unmap_hugepage_range(struct vm_area_struct *, |
| 29 | unsigned long, unsigned long, struct page *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
| 31 | int hugetlb_report_meminfo(char *); |
| 32 | int hugetlb_report_node_meminfo(int, char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | unsigned long hugetlb_total_pages(void); |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 34 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
| 35 | unsigned long address, int write_access); |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 36 | int hugetlb_reserve_pages(struct inode *inode, long from, long to, |
| 37 | struct vm_area_struct *vma); |
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 | |
| 40 | extern unsigned long max_huge_pages; |
Nishanth Aravamudan | 064d9ef | 2008-02-13 15:03:19 -0800 | [diff] [blame] | 41 | extern unsigned long sysctl_overcommit_huge_pages; |
Mel Gorman | 396faf0 | 2007-07-17 04:03:13 -0700 | [diff] [blame] | 42 | extern unsigned long hugepages_treat_as_movable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 44 | extern int sysctl_hugetlb_shm_group; |
| 45 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 46 | /* arch callbacks */ |
| 47 | |
| 48 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); |
| 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); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 55 | int pmd_huge(pmd_t pmd); |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 56 | void hugetlb_change_protection(struct vm_area_struct *vma, |
| 57 | unsigned long address, unsigned long end, pgprot_t newprot); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 60 | |
| 61 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 62 | { |
| 63 | return 0; |
| 64 | } |
Mel Gorman | a1e7877 | 2008-07-23 21:27:23 -0700 | [diff] [blame] | 65 | |
| 66 | static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) |
| 67 | { |
| 68 | } |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static inline unsigned long hugetlb_total_pages(void) |
| 71 | { |
| 72 | return 0; |
| 73 | } |
| 74 | |
Adam Litke | 5b23dbe | 2007-11-14 16:59:33 -0800 | [diff] [blame] | 75 | #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] | 76 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 77 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 78 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
Mel Gorman | 04f2cbe | 2008-07-23 21:27:25 -0700 | [diff] [blame^] | 79 | #define unmap_hugepage_range(vma, start, end, page) BUG() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #define hugetlb_report_meminfo(buf) 0 |
| 81 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 82 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
David Gibson | dec4ad8 | 2007-08-30 23:56:40 -0700 | [diff] [blame] | 83 | #define prepare_hugepage_range(addr,len) (-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | #define pmd_huge(x) 0 |
| 85 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 86 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 87 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 89 | #define hugetlb_change_protection(vma, address, end, newprot) |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #ifndef HPAGE_MASK |
Robin Holt | 51c6f66 | 2005-11-13 16:06:42 -0800 | [diff] [blame] | 92 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
| 93 | #define HPAGE_SIZE PAGE_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #endif |
| 95 | |
| 96 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 97 | |
| 98 | #ifdef CONFIG_HUGETLBFS |
| 99 | struct hugetlbfs_config { |
| 100 | uid_t uid; |
| 101 | gid_t gid; |
| 102 | umode_t mode; |
| 103 | long nr_blocks; |
| 104 | long nr_inodes; |
| 105 | }; |
| 106 | |
| 107 | struct hugetlbfs_sb_info { |
| 108 | long max_blocks; /* blocks allowed */ |
| 109 | long free_blocks; /* blocks free */ |
| 110 | long max_inodes; /* inodes allowed */ |
| 111 | long free_inodes; /* inodes free */ |
| 112 | spinlock_t stat_lock; |
| 113 | }; |
| 114 | |
| 115 | |
| 116 | struct hugetlbfs_inode_info { |
| 117 | struct shared_policy policy; |
| 118 | struct inode vfs_inode; |
| 119 | }; |
| 120 | |
| 121 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 122 | { |
| 123 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 124 | } |
| 125 | |
| 126 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 127 | { |
| 128 | return sb->s_fs_info; |
| 129 | } |
| 130 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 131 | extern const struct file_operations hugetlbfs_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | extern struct vm_operations_struct hugetlb_vm_ops; |
Eric W. Biederman | 9d66586 | 2007-06-16 10:16:16 -0700 | [diff] [blame] | 133 | struct file *hugetlb_file_setup(const char *name, size_t); |
Adam Litke | 9a119c0 | 2007-11-14 16:59:41 -0800 | [diff] [blame] | 134 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
| 135 | void hugetlb_put_quota(struct address_space *mapping, long delta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Ken Chen | 45c682a | 2007-11-14 16:59:44 -0800 | [diff] [blame] | 137 | #define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512) |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | static inline int is_file_hugepages(struct file *file) |
| 140 | { |
Adam Litke | 516dffd | 2007-03-01 15:46:08 -0800 | [diff] [blame] | 141 | if (file->f_op == &hugetlbfs_file_operations) |
| 142 | return 1; |
| 143 | if (is_file_shm_hugepages(file)) |
| 144 | return 1; |
| 145 | |
| 146 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | static inline void set_file_hugepages(struct file *file) |
| 150 | { |
| 151 | file->f_op = &hugetlbfs_file_operations; |
| 152 | } |
| 153 | #else /* !CONFIG_HUGETLBFS */ |
| 154 | |
| 155 | #define is_file_hugepages(file) 0 |
| 156 | #define set_file_hugepages(file) BUG() |
Eric W. Biederman | 9d66586 | 2007-06-16 10:16:16 -0700 | [diff] [blame] | 157 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | #endif /* !CONFIG_HUGETLBFS */ |
| 160 | |
Adrian Bunk | d2ba27e8 | 2007-05-06 14:49:00 -0700 | [diff] [blame] | 161 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| 162 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, |
| 163 | unsigned long len, unsigned long pgoff, |
| 164 | unsigned long flags); |
| 165 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ |
| 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | #endif /* _LINUX_HUGETLB_H */ |