Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_HUGETLB_H |
| 2 | #define _LINUX_HUGETLB_H |
| 3 | |
| 4 | #ifdef CONFIG_HUGETLB_PAGE |
| 5 | |
| 6 | #include <linux/mempolicy.h> |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame^] | 7 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | struct ctl_table; |
| 10 | |
| 11 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 12 | { |
| 13 | return vma->vm_flags & VM_HUGETLB; |
| 14 | } |
| 15 | |
| 16 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
| 17 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
| 18 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); |
| 19 | void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
| 20 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
| 21 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
| 22 | int hugetlb_report_meminfo(char *); |
| 23 | int hugetlb_report_node_meminfo(int, char *); |
| 24 | int is_hugepage_mem_enough(size_t); |
| 25 | unsigned long hugetlb_total_pages(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | struct page *alloc_huge_page(void); |
| 27 | void free_huge_page(struct page *); |
| 28 | |
| 29 | extern unsigned long max_huge_pages; |
| 30 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 31 | extern int sysctl_hugetlb_shm_group; |
| 32 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame^] | 33 | /* arch callbacks */ |
| 34 | |
| 35 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); |
| 36 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
| 37 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
| 38 | int write); |
| 39 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 40 | pmd_t *pmd, int write); |
| 41 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len); |
| 42 | int pmd_huge(pmd_t pmd); |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
| 45 | #define is_hugepage_only_range(mm, addr, len) 0 |
Hugh Dickins | 3bf5ee9 | 2005-04-19 13:29:16 -0700 | [diff] [blame] | 46 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
| 47 | do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #endif |
| 49 | |
| 50 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE |
| 51 | #define prepare_hugepage_range(addr, len) \ |
| 52 | is_aligned_hugepage_range(addr, len) |
| 53 | #else |
| 54 | int prepare_hugepage_range(unsigned long addr, unsigned long len); |
| 55 | #endif |
| 56 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame^] | 57 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
| 58 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) |
| 59 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) |
| 60 | #else |
| 61 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| 62 | pte_t *ptep, pte_t pte); |
| 63 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 64 | pte_t *ptep); |
| 65 | #endif |
| 66 | |
| 67 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK |
| 68 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) |
| 69 | #else |
| 70 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); |
| 71 | #endif |
| 72 | |
| 73 | #ifndef ARCH_HAS_HUGETLB_CLEAN_STALE_PGTABLE |
| 74 | #define hugetlb_clean_stale_pgtable(pte) BUG() |
| 75 | #else |
| 76 | void hugetlb_clean_stale_pgtable(pte_t *pte); |
| 77 | #endif |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 80 | |
| 81 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 82 | { |
| 83 | return 0; |
| 84 | } |
| 85 | static inline unsigned long hugetlb_total_pages(void) |
| 86 | { |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) |
| 91 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 92 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 93 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
| 94 | #define zap_hugepage_range(vma, start, len) BUG() |
| 95 | #define unmap_hugepage_range(vma, start, end) BUG() |
| 96 | #define is_hugepage_mem_enough(size) 0 |
| 97 | #define hugetlb_report_meminfo(buf) 0 |
| 98 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 99 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
| 100 | #define is_aligned_hugepage_range(addr, len) 0 |
| 101 | #define prepare_hugepage_range(addr, len) (-EINVAL) |
| 102 | #define pmd_huge(x) 0 |
| 103 | #define is_hugepage_only_range(mm, addr, len) 0 |
Hugh Dickins | 3bf5ee9 | 2005-04-19 13:29:16 -0700 | [diff] [blame] | 104 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
| 105 | do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #define alloc_huge_page() ({ NULL; }) |
| 107 | #define free_huge_page(p) ({ (void)(p); BUG(); }) |
| 108 | |
| 109 | #ifndef HPAGE_MASK |
| 110 | #define HPAGE_MASK 0 /* Keep the compiler happy */ |
| 111 | #define HPAGE_SIZE 0 |
| 112 | #endif |
| 113 | |
| 114 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 115 | |
| 116 | #ifdef CONFIG_HUGETLBFS |
| 117 | struct hugetlbfs_config { |
| 118 | uid_t uid; |
| 119 | gid_t gid; |
| 120 | umode_t mode; |
| 121 | long nr_blocks; |
| 122 | long nr_inodes; |
| 123 | }; |
| 124 | |
| 125 | struct hugetlbfs_sb_info { |
| 126 | long max_blocks; /* blocks allowed */ |
| 127 | long free_blocks; /* blocks free */ |
| 128 | long max_inodes; /* inodes allowed */ |
| 129 | long free_inodes; /* inodes free */ |
| 130 | spinlock_t stat_lock; |
| 131 | }; |
| 132 | |
| 133 | |
| 134 | struct hugetlbfs_inode_info { |
| 135 | struct shared_policy policy; |
| 136 | struct inode vfs_inode; |
| 137 | }; |
| 138 | |
| 139 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 140 | { |
| 141 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 142 | } |
| 143 | |
| 144 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 145 | { |
| 146 | return sb->s_fs_info; |
| 147 | } |
| 148 | |
| 149 | extern struct file_operations hugetlbfs_file_operations; |
| 150 | extern struct vm_operations_struct hugetlb_vm_ops; |
| 151 | struct file *hugetlb_zero_setup(size_t); |
| 152 | int hugetlb_get_quota(struct address_space *mapping); |
| 153 | void hugetlb_put_quota(struct address_space *mapping); |
| 154 | |
| 155 | static inline int is_file_hugepages(struct file *file) |
| 156 | { |
| 157 | return file->f_op == &hugetlbfs_file_operations; |
| 158 | } |
| 159 | |
| 160 | static inline void set_file_hugepages(struct file *file) |
| 161 | { |
| 162 | file->f_op = &hugetlbfs_file_operations; |
| 163 | } |
| 164 | #else /* !CONFIG_HUGETLBFS */ |
| 165 | |
| 166 | #define is_file_hugepages(file) 0 |
| 167 | #define set_file_hugepages(file) BUG() |
| 168 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) |
| 169 | |
| 170 | #endif /* !CONFIG_HUGETLBFS */ |
| 171 | |
| 172 | #endif /* _LINUX_HUGETLB_H */ |