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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 *); | |
396faf03 | 20 | int hugetlb_treat_movable_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
1da177e4 | 21 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
5b23dbe8 | 22 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, 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 KC |
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; |
54f9f80d | 36 | extern int hugetlb_dynamic_pool; |
1da177e4 LT |
37 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
38 | extern int sysctl_hugetlb_shm_group; | |
39 | ||
63551ae0 DG |
40 | /* arch callbacks */ |
41 | ||
42 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
43 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
39dde65c | 44 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
63551ae0 DG |
45 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
46 | int write); | |
47 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
48 | pmd_t *pmd, int write); | |
63551ae0 | 49 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
50 | void hugetlb_change_protection(struct vm_area_struct *vma, |
51 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 52 | |
1da177e4 LT |
53 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
54 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
55 | #endif |
56 | ||
57 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
58 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
59 | #else |
60 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
61 | unsigned long end, unsigned long floor, | |
62 | unsigned long ceiling); | |
1da177e4 LT |
63 | #endif |
64 | ||
65 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
66 | /* |
67 | * If the arch doesn't supply something else, assume that hugepage | |
68 | * size aligned regions are ok without further preparation. | |
69 | */ | |
dec4ad86 | 70 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len) |
42b88bef DG |
71 | { |
72 | if (len & ~HPAGE_MASK) | |
73 | return -EINVAL; | |
74 | if (addr & ~HPAGE_MASK) | |
75 | return -EINVAL; | |
76 | return 0; | |
77 | } | |
1da177e4 | 78 | #else |
dec4ad86 | 79 | int prepare_hugepage_range(unsigned long addr, unsigned long len); |
1da177e4 LT |
80 | #endif |
81 | ||
63551ae0 DG |
82 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
83 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
84 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
85 | #else | |
86 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
87 | pte_t *ptep, pte_t pte); | |
88 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
89 | pte_t *ptep); | |
90 | #endif | |
91 | ||
92 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
93 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
94 | #else | |
95 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
96 | #endif | |
97 | ||
1da177e4 LT |
98 | #else /* !CONFIG_HUGETLB_PAGE */ |
99 | ||
100 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | static inline unsigned long hugetlb_total_pages(void) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | ||
5b23dbe8 | 109 | #define follow_hugetlb_page(m,v,p,vs,a,b,i,w) ({ BUG(); 0; }) |
1da177e4 LT |
110 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
111 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
112 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 113 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
114 | #define hugetlb_report_meminfo(buf) 0 |
115 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
116 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
dec4ad86 | 117 | #define prepare_hugepage_range(addr,len) (-EINVAL) |
1da177e4 LT |
118 | #define pmd_huge(x) 0 |
119 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 120 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 121 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 122 | |
8f860591 ZY |
123 | #define hugetlb_change_protection(vma, address, end, newprot) |
124 | ||
1da177e4 | 125 | #ifndef HPAGE_MASK |
51c6f666 RH |
126 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
127 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
128 | #endif |
129 | ||
130 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
131 | ||
132 | #ifdef CONFIG_HUGETLBFS | |
133 | struct hugetlbfs_config { | |
134 | uid_t uid; | |
135 | gid_t gid; | |
136 | umode_t mode; | |
137 | long nr_blocks; | |
138 | long nr_inodes; | |
139 | }; | |
140 | ||
141 | struct hugetlbfs_sb_info { | |
142 | long max_blocks; /* blocks allowed */ | |
143 | long free_blocks; /* blocks free */ | |
144 | long max_inodes; /* inodes allowed */ | |
145 | long free_inodes; /* inodes free */ | |
146 | spinlock_t stat_lock; | |
147 | }; | |
148 | ||
149 | ||
150 | struct hugetlbfs_inode_info { | |
151 | struct shared_policy policy; | |
152 | struct inode vfs_inode; | |
153 | }; | |
154 | ||
155 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
156 | { | |
157 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
158 | } | |
159 | ||
160 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
161 | { | |
162 | return sb->s_fs_info; | |
163 | } | |
164 | ||
4b6f5d20 | 165 | extern const struct file_operations hugetlbfs_file_operations; |
1da177e4 | 166 | extern struct vm_operations_struct hugetlb_vm_ops; |
9d66586f | 167 | struct file *hugetlb_file_setup(const char *name, size_t); |
1da177e4 LT |
168 | int hugetlb_get_quota(struct address_space *mapping); |
169 | void hugetlb_put_quota(struct address_space *mapping); | |
170 | ||
171 | static inline int is_file_hugepages(struct file *file) | |
172 | { | |
516dffdc AL |
173 | if (file->f_op == &hugetlbfs_file_operations) |
174 | return 1; | |
175 | if (is_file_shm_hugepages(file)) | |
176 | return 1; | |
177 | ||
178 | return 0; | |
1da177e4 LT |
179 | } |
180 | ||
181 | static inline void set_file_hugepages(struct file *file) | |
182 | { | |
183 | file->f_op = &hugetlbfs_file_operations; | |
184 | } | |
185 | #else /* !CONFIG_HUGETLBFS */ | |
186 | ||
187 | #define is_file_hugepages(file) 0 | |
188 | #define set_file_hugepages(file) BUG() | |
9d66586f | 189 | #define hugetlb_file_setup(name,size) ERR_PTR(-ENOSYS) |
1da177e4 LT |
190 | |
191 | #endif /* !CONFIG_HUGETLBFS */ | |
192 | ||
d2ba27e8 AB |
193 | #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
194 | unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, | |
195 | unsigned long len, unsigned long pgoff, | |
196 | unsigned long flags); | |
197 | #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ | |
198 | ||
1da177e4 | 199 | #endif /* _LINUX_HUGETLB_H */ |