Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_HUGETLB_H |
2 | #define _LINUX_HUGETLB_H | |
3 | ||
4e950f6f AD |
4 | #include <linux/fs.h> |
5 | ||
1da177e4 LT |
6 | #ifdef CONFIG_HUGETLB_PAGE |
7 | ||
8 | #include <linux/mempolicy.h> | |
516dffdc | 9 | #include <linux/shm.h> |
63551ae0 | 10 | #include <asm/tlbflush.h> |
1da177e4 LT |
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 *); | |
396faf03 | 20 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 LT |
21 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
22 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); | |
1da177e4 | 23 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
502717f4 | 24 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
1da177e4 LT |
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 *); | |
1da177e4 | 28 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
29 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
30 | unsigned long address, int write_access); | |
a43a8c39 CK |
31 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
32 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); | |
1da177e4 LT |
33 | |
34 | extern unsigned long max_huge_pages; | |
396faf03 | 35 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
36 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
37 | extern int sysctl_hugetlb_shm_group; | |
38 | ||
63551ae0 DG |
39 | /* arch callbacks */ |
40 | ||
41 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
42 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
39dde65c | 43 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
44 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
45 | int write); | |
46 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
47 | pmd_t *pmd, int write); | |
63551ae0 | 48 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
49 | void hugetlb_change_protection(struct vm_area_struct *vma, |
50 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 51 | |
1da177e4 LT |
52 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
53 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
54 | #endif |
55 | ||
56 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
57 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
58 | #else |
59 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
60 | unsigned long end, unsigned long floor, | |
61 | unsigned long ceiling); | |
1da177e4 LT |
62 | #endif |
63 | ||
64 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
65 | /* |
66 | * If the arch doesn't supply something else, assume that hugepage | |
67 | * size aligned regions are ok without further preparation. | |
68 | */ | |
68589bc3 HD |
69 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len, |
70 | pgoff_t pgoff) | |
42b88bef | 71 | { |
68589bc3 HD |
72 | if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT)) |
73 | return -EINVAL; | |
42b88bef DG |
74 | if (len & ~HPAGE_MASK) |
75 | return -EINVAL; | |
76 | if (addr & ~HPAGE_MASK) | |
77 | return -EINVAL; | |
78 | return 0; | |
79 | } | |
1da177e4 | 80 | #else |
68589bc3 HD |
81 | int prepare_hugepage_range(unsigned long addr, unsigned long len, |
82 | pgoff_t pgoff); | |
1da177e4 LT |
83 | #endif |
84 | ||
63551ae0 DG |
85 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
86 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
87 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
88 | #else | |
89 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
90 | pte_t *ptep, pte_t pte); | |
91 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
92 | pte_t *ptep); | |
93 | #endif | |
94 | ||
95 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
96 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
97 | #else | |
98 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
99 | #endif | |
100 | ||
1da177e4 LT |
101 | #else /* !CONFIG_HUGETLB_PAGE */ |
102 | ||
103 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | static inline unsigned long hugetlb_total_pages(void) | |
108 | { | |
109 | return 0; | |
110 | } | |
111 | ||
112 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
113 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
114 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
115 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 116 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
117 | #define hugetlb_report_meminfo(buf) 0 |
118 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
119 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
68589bc3 | 120 | #define prepare_hugepage_range(addr,len,pgoff) (-EINVAL) |
1da177e4 LT |
121 | #define pmd_huge(x) 0 |
122 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 123 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 124 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 125 | |
8f860591 ZY |
126 | #define hugetlb_change_protection(vma, address, end, newprot) |
127 | ||
1da177e4 | 128 | #ifndef HPAGE_MASK |
51c6f666 RH |
129 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
130 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
131 | #endif |
132 | ||
133 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
134 | ||
135 | #ifdef CONFIG_HUGETLBFS | |
136 | struct hugetlbfs_config { | |
137 | uid_t uid; | |
138 | gid_t gid; | |
139 | umode_t mode; | |
140 | long nr_blocks; | |
141 | long nr_inodes; | |
142 | }; | |
143 | ||
144 | struct hugetlbfs_sb_info { | |
145 | long max_blocks; /* blocks allowed */ | |
146 | long free_blocks; /* blocks free */ | |
147 | long max_inodes; /* inodes allowed */ | |
148 | long free_inodes; /* inodes free */ | |
149 | spinlock_t stat_lock; | |
150 | }; | |
151 | ||
152 | ||
153 | struct hugetlbfs_inode_info { | |
154 | struct shared_policy policy; | |
155 | struct inode vfs_inode; | |
156 | }; | |
157 | ||
158 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
159 | { | |
160 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
161 | } | |
162 | ||
163 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
164 | { | |
165 | return sb->s_fs_info; | |
166 | } | |
167 | ||
4b6f5d20 | 168 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 169 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 170 | struct file *hugetlb_file_setup(const char *name, size_t); |
1da177e4 LT |
171 | int hugetlb_get_quota(struct address_space *mapping); |
172 | void hugetlb_put_quota(struct address_space *mapping); | |
173 | ||
174 | static inline int is_file_hugepages(struct file *file) | |
175 | { | |
516dffdc AL |
176 | if (file->f_op == &hugetlbfs_file_operations) |
177 | return 1; | |
178 | if (is_file_shm_hugepages(file)) | |
179 | return 1; | |
180 | ||
181 | return 0; | |
1da177e4 LT |
182 | } |
183 | ||
184 | static inline void set_file_hugepages(struct file *file) | |
185 | { | |
186 | file->f_op = &hugetlbfs_file_operations; | |
187 | } | |
188 | #else /* !CONFIG_HUGETLBFS */ | |
189 | ||
190 | #define is_file_hugepages(file) 0 | |
191 | #define set_file_hugepages(file) BUG() | |
9d66586f | 192 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
1da177e4 LT |
193 | |
194 | #endif /* !CONFIG_HUGETLBFS */ | |
195 | ||
d2ba27e8 AB |
196 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
197 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
198 | unsigned long len, unsigned long pgoff, | |
199 | unsigned long flags); | |
200 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
201 | ||
1da177e4 | 202 | #endif /* _LINUX_HUGETLB_H */ |