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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> | |
516dffdc | 7 | #include <linux/shm.h> |
63551ae0 | 8 | #include <asm/tlbflush.h> |
1da177e4 LT |
9 | |
10 | struct ctl_table; | |
11 | ||
12 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
13 | { | |
14 | return vma->vm_flags & VM_HUGETLB; | |
15 | } | |
16 | ||
17 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); | |
18 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); | |
19 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); | |
1da177e4 | 20 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
502717f4 | 21 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
1da177e4 LT |
22 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
23 | int hugetlb_report_meminfo(char *); | |
24 | int hugetlb_report_node_meminfo(int, char *); | |
1da177e4 | 25 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
26 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
27 | unsigned long address, int write_access); | |
a43a8c39 KC |
28 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
29 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); | |
1da177e4 LT |
30 | |
31 | extern unsigned long max_huge_pages; | |
32 | extern const unsigned long hugetlb_zero, hugetlb_infinity; | |
33 | extern int sysctl_hugetlb_shm_group; | |
34 | ||
63551ae0 DG |
35 | /* arch callbacks */ |
36 | ||
37 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
38 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
39dde65c | 39 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
40 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
41 | int write); | |
42 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
43 | pmd_t *pmd, int write); | |
63551ae0 | 44 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
45 | void hugetlb_change_protection(struct vm_area_struct *vma, |
46 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 47 | |
1da177e4 LT |
48 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
49 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
50 | #endif |
51 | ||
52 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
53 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
54 | #else |
55 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
56 | unsigned long end, unsigned long floor, | |
57 | unsigned long ceiling); | |
1da177e4 LT |
58 | #endif |
59 | ||
60 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
61 | /* |
62 | * If the arch doesn't supply something else, assume that hugepage | |
63 | * size aligned regions are ok without further preparation. | |
64 | */ | |
68589bc3 HD |
65 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len, |
66 | pgoff_t pgoff) | |
42b88bef | 67 | { |
68589bc3 HD |
68 | if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT)) |
69 | return -EINVAL; | |
42b88bef DG |
70 | if (len & ~HPAGE_MASK) |
71 | return -EINVAL; | |
72 | if (addr & ~HPAGE_MASK) | |
73 | return -EINVAL; | |
74 | return 0; | |
75 | } | |
1da177e4 | 76 | #else |
68589bc3 HD |
77 | int prepare_hugepage_range(unsigned long addr, unsigned long len, |
78 | pgoff_t pgoff); | |
1da177e4 LT |
79 | #endif |
80 | ||
63551ae0 DG |
81 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
82 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
83 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
84 | #else | |
85 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
86 | pte_t *ptep, pte_t pte); | |
87 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
88 | pte_t *ptep); | |
89 | #endif | |
90 | ||
91 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
92 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
93 | #else | |
94 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
95 | #endif | |
96 | ||
1da177e4 LT |
97 | #else /* !CONFIG_HUGETLB_PAGE */ |
98 | ||
99 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | static inline unsigned long hugetlb_total_pages(void) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | ||
108 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
109 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
110 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
111 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 112 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
113 | #define hugetlb_report_meminfo(buf) 0 |
114 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
115 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
68589bc3 | 116 | #define prepare_hugepage_range(addr,len,pgoff) (-EINVAL) |
1da177e4 LT |
117 | #define pmd_huge(x) 0 |
118 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 119 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 120 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 121 | |
8f860591 ZY |
122 | #define hugetlb_change_protection(vma, address, end, newprot) |
123 | ||
1da177e4 | 124 | #ifndef HPAGE_MASK |
51c6f666 RH |
125 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
126 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
127 | #endif |
128 | ||
129 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
130 | ||
131 | #ifdef CONFIG_HUGETLBFS | |
132 | struct hugetlbfs_config { | |
133 | uid_t uid; | |
134 | gid_t gid; | |
135 | umode_t mode; | |
136 | long nr_blocks; | |
137 | long nr_inodes; | |
138 | }; | |
139 | ||
140 | struct hugetlbfs_sb_info { | |
141 | long max_blocks; /* blocks allowed */ | |
142 | long free_blocks; /* blocks free */ | |
143 | long max_inodes; /* inodes allowed */ | |
144 | long free_inodes; /* inodes free */ | |
145 | spinlock_t stat_lock; | |
146 | }; | |
147 | ||
148 | ||
149 | struct hugetlbfs_inode_info { | |
150 | struct shared_policy policy; | |
151 | struct inode vfs_inode; | |
152 | }; | |
153 | ||
154 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
155 | { | |
156 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
157 | } | |
158 | ||
159 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
160 | { | |
161 | return sb->s_fs_info; | |
162 | } | |
163 | ||
4b6f5d20 | 164 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 LT |
165 | extern struct vm_operations_struct hugetlb_vm_ops; |
166 | struct file *hugetlb_zero_setup(size_t); | |
167 | int hugetlb_get_quota(struct address_space *mapping); | |
168 | void hugetlb_put_quota(struct address_space *mapping); | |
169 | ||
170 | static inline int is_file_hugepages(struct file *file) | |
171 | { | |
516dffdc AL |
172 | if (file->f_op == &hugetlbfs_file_operations) |
173 | return 1; | |
174 | if (is_file_shm_hugepages(file)) | |
175 | return 1; | |
176 | ||
177 | return 0; | |
1da177e4 LT |
178 | } |
179 | ||
180 | static inline void set_file_hugepages(struct file *file) | |
181 | { | |
182 | file->f_op = &hugetlbfs_file_operations; | |
183 | } | |
184 | #else /* !CONFIG_HUGETLBFS */ | |
185 | ||
186 | #define is_file_hugepages(file) 0 | |
187 | #define set_file_hugepages(file) BUG() | |
188 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) | |
189 | ||
190 | #endif /* !CONFIG_HUGETLBFS */ | |
191 | ||
192 | #endif /* _LINUX_HUGETLB_H */ |