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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4 | #ifdef CONFIG_HUGETLB_PAGE | |
5 | ||
6 | #include <linux/mempolicy.h> | |
63551ae0 | 7 | #include <asm/tlbflush.h> |
1da177e4 LT |
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); | |
1da177e4 | 19 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
502717f4 | 20 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
1da177e4 LT |
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 *); | |
1da177e4 | 24 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
25 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
26 | unsigned long address, int write_access); | |
a43a8c39 KC |
27 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
28 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); | |
1da177e4 LT |
29 | |
30 | extern unsigned long max_huge_pages; | |
31 | extern const unsigned long hugetlb_zero, hugetlb_infinity; | |
32 | extern int sysctl_hugetlb_shm_group; | |
33 | ||
63551ae0 DG |
34 | /* arch callbacks */ |
35 | ||
36 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
37 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
39dde65c | 38 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
39 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
40 | int write); | |
41 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
42 | pmd_t *pmd, int write); | |
63551ae0 | 43 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
44 | void hugetlb_change_protection(struct vm_area_struct *vma, |
45 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 46 | |
1da177e4 LT |
47 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
48 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
49 | #endif |
50 | ||
51 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
52 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
53 | #else |
54 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
55 | unsigned long end, unsigned long floor, | |
56 | unsigned long ceiling); | |
1da177e4 LT |
57 | #endif |
58 | ||
59 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
60 | /* |
61 | * If the arch doesn't supply something else, assume that hugepage | |
62 | * size aligned regions are ok without further preparation. | |
63 | */ | |
68589bc3 HD |
64 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len, |
65 | pgoff_t pgoff) | |
42b88bef | 66 | { |
68589bc3 HD |
67 | if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT)) |
68 | return -EINVAL; | |
42b88bef DG |
69 | if (len & ~HPAGE_MASK) |
70 | return -EINVAL; | |
71 | if (addr & ~HPAGE_MASK) | |
72 | return -EINVAL; | |
73 | return 0; | |
74 | } | |
1da177e4 | 75 | #else |
68589bc3 HD |
76 | int prepare_hugepage_range(unsigned long addr, unsigned long len, |
77 | pgoff_t pgoff); | |
1da177e4 LT |
78 | #endif |
79 | ||
63551ae0 DG |
80 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
81 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
82 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
83 | #else | |
84 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
85 | pte_t *ptep, pte_t pte); | |
86 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
87 | pte_t *ptep); | |
88 | #endif | |
89 | ||
90 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
91 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
92 | #else | |
93 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
94 | #endif | |
95 | ||
1da177e4 LT |
96 | #else /* !CONFIG_HUGETLB_PAGE */ |
97 | ||
98 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | static inline unsigned long hugetlb_total_pages(void) | |
103 | { | |
104 | return 0; | |
105 | } | |
106 | ||
107 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
108 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
109 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
110 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 111 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
112 | #define hugetlb_report_meminfo(buf) 0 |
113 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
114 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
68589bc3 | 115 | #define prepare_hugepage_range(addr,len,pgoff) (-EINVAL) |
1da177e4 LT |
116 | #define pmd_huge(x) 0 |
117 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 118 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 119 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 120 | |
8f860591 ZY |
121 | #define hugetlb_change_protection(vma, address, end, newprot) |
122 | ||
1da177e4 | 123 | #ifndef HPAGE_MASK |
51c6f666 RH |
124 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
125 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
126 | #endif |
127 | ||
128 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
129 | ||
130 | #ifdef CONFIG_HUGETLBFS | |
131 | struct hugetlbfs_config { | |
132 | uid_t uid; | |
133 | gid_t gid; | |
134 | umode_t mode; | |
135 | long nr_blocks; | |
136 | long nr_inodes; | |
137 | }; | |
138 | ||
139 | struct hugetlbfs_sb_info { | |
140 | long max_blocks; /* blocks allowed */ | |
141 | long free_blocks; /* blocks free */ | |
142 | long max_inodes; /* inodes allowed */ | |
143 | long free_inodes; /* inodes free */ | |
144 | spinlock_t stat_lock; | |
145 | }; | |
146 | ||
147 | ||
148 | struct hugetlbfs_inode_info { | |
149 | struct shared_policy policy; | |
150 | struct inode vfs_inode; | |
151 | }; | |
152 | ||
153 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
154 | { | |
155 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
156 | } | |
157 | ||
158 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
159 | { | |
160 | return sb->s_fs_info; | |
161 | } | |
162 | ||
4b6f5d20 | 163 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 LT |
164 | extern struct vm_operations_struct hugetlb_vm_ops; |
165 | struct file *hugetlb_zero_setup(size_t); | |
166 | int hugetlb_get_quota(struct address_space *mapping); | |
167 | void hugetlb_put_quota(struct address_space *mapping); | |
168 | ||
169 | static inline int is_file_hugepages(struct file *file) | |
170 | { | |
171 | return file->f_op == &hugetlbfs_file_operations; | |
172 | } | |
173 | ||
174 | static inline void set_file_hugepages(struct file *file) | |
175 | { | |
176 | file->f_op = &hugetlbfs_file_operations; | |
177 | } | |
178 | #else /* !CONFIG_HUGETLBFS */ | |
179 | ||
180 | #define is_file_hugepages(file) 0 | |
181 | #define set_file_hugepages(file) BUG() | |
182 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) | |
183 | ||
184 | #endif /* !CONFIG_HUGETLBFS */ | |
185 | ||
186 | #endif /* _LINUX_HUGETLB_H */ |