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Commit | Line | Data |
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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 *); | |
a3d0c6aa | 20 | int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
396faf03 | 21 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 | 22 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
5b23dbe8 | 23 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int, int); |
1da177e4 | 24 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
502717f4 | 25 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
1da177e4 LT |
26 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
27 | int hugetlb_report_meminfo(char *); | |
28 | int hugetlb_report_node_meminfo(int, char *); | |
1da177e4 | 29 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
30 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
31 | unsigned long address, int write_access); | |
a43a8c39 KC |
32 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
33 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); | |
1da177e4 LT |
34 | |
35 | extern unsigned long max_huge_pages; | |
064d9efe | 36 | extern unsigned long sysctl_overcommit_huge_pages; |
396faf03 | 37 | extern unsigned long hugepages_treat_as_movable; |
1da177e4 LT |
38 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
39 | extern int sysctl_hugetlb_shm_group; | |
40 | ||
63551ae0 DG |
41 | /* arch callbacks */ |
42 | ||
43 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
44 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
39dde65c | 45 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
46 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
47 | int write); | |
48 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
49 | pmd_t *pmd, int write); | |
63551ae0 | 50 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
51 | void hugetlb_change_protection(struct vm_area_struct *vma, |
52 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 53 | |
1da177e4 LT |
54 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
55 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
56 | #endif |
57 | ||
58 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
59 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
60 | #else |
61 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
62 | unsigned long end, unsigned long floor, | |
63 | unsigned long ceiling); | |
1da177e4 LT |
64 | #endif |
65 | ||
66 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
67 | /* |
68 | * If the arch doesn't supply something else, assume that hugepage | |
69 | * size aligned regions are ok without further preparation. | |
70 | */ | |
dec4ad86 | 71 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len) |
42b88bef DG |
72 | { |
73 | if (len & ~HPAGE_MASK) | |
74 | return -EINVAL; | |
75 | if (addr & ~HPAGE_MASK) | |
76 | return -EINVAL; | |
77 | return 0; | |
78 | } | |
1da177e4 | 79 | #else |
dec4ad86 | 80 | int prepare_hugepage_range(unsigned long addr, unsigned long len); |
1da177e4 LT |
81 | #endif |
82 | ||
63551ae0 DG |
83 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
84 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
85 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
86 | #else | |
87 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
88 | pte_t *ptep, pte_t pte); | |
89 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
90 | pte_t *ptep); | |
91 | #endif | |
92 | ||
93 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
94 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
95 | #else | |
96 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #else /* !CONFIG_HUGETLB_PAGE */ |
100 | ||
101 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
102 | { | |
103 | return 0; | |
104 | } | |
105 | static inline unsigned long hugetlb_total_pages(void) | |
106 | { | |
107 | return 0; | |
108 | } | |
109 | ||
5b23dbe8 | 110 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
111 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
112 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
113 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 114 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
115 | #define hugetlb_report_meminfo(buf) 0 |
116 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
117 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
dec4ad86 | 118 | #define prepare_hugepage_range(addr,len) (-EINVAL) |
1da177e4 LT |
119 | #define pmd_huge(x) 0 |
120 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 121 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 122 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 123 | |
8f860591 ZY |
124 | #define hugetlb_change_protection(vma, address, end, newprot) |
125 | ||
1da177e4 | 126 | #ifndef HPAGE_MASK |
51c6f666 RH |
127 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
128 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
129 | #endif |
130 | ||
131 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
132 | ||
133 | #ifdef CONFIG_HUGETLBFS | |
134 | struct hugetlbfs_config { | |
135 | uid_t uid; | |
136 | gid_t gid; | |
137 | umode_t mode; | |
138 | long nr_blocks; | |
139 | long nr_inodes; | |
140 | }; | |
141 | ||
142 | struct hugetlbfs_sb_info { | |
143 | long max_blocks; /* blocks allowed */ | |
144 | long free_blocks; /* blocks free */ | |
145 | long max_inodes; /* inodes allowed */ | |
146 | long free_inodes; /* inodes free */ | |
147 | spinlock_t stat_lock; | |
148 | }; | |
149 | ||
150 | ||
151 | struct hugetlbfs_inode_info { | |
152 | struct shared_policy policy; | |
153 | struct inode vfs_inode; | |
154 | }; | |
155 | ||
156 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
157 | { | |
158 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
159 | } | |
160 | ||
161 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
162 | { | |
163 | return sb->s_fs_info; | |
164 | } | |
165 | ||
4b6f5d20 | 166 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 167 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 168 | struct file *hugetlb_file_setup(const char *name, size_t); |
9a119c05 AL |
169 | int hugetlb_get_quota(struct address_space *mapping, long delta); |
170 | void hugetlb_put_quota(struct address_space *mapping, long delta); | |
1da177e4 | 171 | |
45c682a6 KC |
172 | #define BLOCKS_PER_HUGEPAGE (HPAGE_SIZE / 512) |
173 | ||
1da177e4 LT |
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 */ |