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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 LT |
19 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
20 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); | |
21 | int hugetlb_report_meminfo(char *); | |
22 | int hugetlb_report_node_meminfo(int, char *); | |
1da177e4 | 23 | unsigned long hugetlb_total_pages(void); |
ac9b9c66 HD |
24 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
25 | unsigned long address, int write_access); | |
1da177e4 LT |
26 | |
27 | extern unsigned long max_huge_pages; | |
28 | extern const unsigned long hugetlb_zero, hugetlb_infinity; | |
29 | extern int sysctl_hugetlb_shm_group; | |
30 | ||
63551ae0 DG |
31 | /* arch callbacks */ |
32 | ||
33 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); | |
34 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); | |
35 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, | |
36 | int write); | |
37 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, | |
38 | pmd_t *pmd, int write); | |
39 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len); | |
40 | int pmd_huge(pmd_t pmd); | |
8f860591 ZY |
41 | void hugetlb_change_protection(struct vm_area_struct *vma, |
42 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 43 | |
1da177e4 LT |
44 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
45 | #define is_hugepage_only_range(mm, addr, len) 0 | |
3bf5ee95 HD |
46 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
47 | do { } while (0) | |
1da177e4 LT |
48 | #endif |
49 | ||
50 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
51 | #define prepare_hugepage_range(addr, len) \ | |
52 | is_aligned_hugepage_range(addr, len) | |
53 | #else | |
54 | int prepare_hugepage_range(unsigned long addr, unsigned long len); | |
55 | #endif | |
56 | ||
63551ae0 DG |
57 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
58 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
59 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
60 | #else | |
61 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
62 | pte_t *ptep, pte_t pte); | |
63 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
64 | pte_t *ptep); | |
65 | #endif | |
66 | ||
67 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
68 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
69 | #else | |
70 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
71 | #endif | |
72 | ||
1da177e4 LT |
73 | #else /* !CONFIG_HUGETLB_PAGE */ |
74 | ||
75 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
76 | { | |
77 | return 0; | |
78 | } | |
79 | static inline unsigned long hugetlb_total_pages(void) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
85 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
86 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
87 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 88 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
89 | #define hugetlb_report_meminfo(buf) 0 |
90 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
91 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
92 | #define is_aligned_hugepage_range(addr, len) 0 | |
93 | #define prepare_hugepage_range(addr, len) (-EINVAL) | |
94 | #define pmd_huge(x) 0 | |
95 | #define is_hugepage_only_range(mm, addr, len) 0 | |
3bf5ee95 HD |
96 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \ |
97 | do { } while (0) | |
ac9b9c66 | 98 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 99 | |
8f860591 ZY |
100 | #define hugetlb_change_protection(vma, address, end, newprot) |
101 | ||
1da177e4 | 102 | #ifndef HPAGE_MASK |
51c6f666 RH |
103 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
104 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
105 | #endif |
106 | ||
107 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
108 | ||
109 | #ifdef CONFIG_HUGETLBFS | |
110 | struct hugetlbfs_config { | |
111 | uid_t uid; | |
112 | gid_t gid; | |
113 | umode_t mode; | |
114 | long nr_blocks; | |
115 | long nr_inodes; | |
116 | }; | |
117 | ||
118 | struct hugetlbfs_sb_info { | |
119 | long max_blocks; /* blocks allowed */ | |
120 | long free_blocks; /* blocks free */ | |
121 | long max_inodes; /* inodes allowed */ | |
122 | long free_inodes; /* inodes free */ | |
123 | spinlock_t stat_lock; | |
124 | }; | |
125 | ||
126 | ||
127 | struct hugetlbfs_inode_info { | |
128 | struct shared_policy policy; | |
b45b5bd6 DG |
129 | /* Protected by the (global) hugetlb_lock */ |
130 | unsigned long prereserved_hpages; | |
1da177e4 LT |
131 | struct inode vfs_inode; |
132 | }; | |
133 | ||
134 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) | |
135 | { | |
136 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); | |
137 | } | |
138 | ||
139 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) | |
140 | { | |
141 | return sb->s_fs_info; | |
142 | } | |
143 | ||
144 | extern struct file_operations hugetlbfs_file_operations; | |
145 | extern struct vm_operations_struct hugetlb_vm_ops; | |
146 | struct file *hugetlb_zero_setup(size_t); | |
b45b5bd6 DG |
147 | int hugetlb_extend_reservation(struct hugetlbfs_inode_info *info, |
148 | unsigned long atleast_hpages); | |
149 | void hugetlb_truncate_reservation(struct hugetlbfs_inode_info *info, | |
150 | unsigned long atmost_hpages); | |
1da177e4 LT |
151 | int hugetlb_get_quota(struct address_space *mapping); |
152 | void hugetlb_put_quota(struct address_space *mapping); | |
153 | ||
154 | static inline int is_file_hugepages(struct file *file) | |
155 | { | |
156 | return file->f_op == &hugetlbfs_file_operations; | |
157 | } | |
158 | ||
159 | static inline void set_file_hugepages(struct file *file) | |
160 | { | |
161 | file->f_op = &hugetlbfs_file_operations; | |
162 | } | |
163 | #else /* !CONFIG_HUGETLBFS */ | |
164 | ||
165 | #define is_file_hugepages(file) 0 | |
166 | #define set_file_hugepages(file) BUG() | |
167 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) | |
168 | ||
169 | #endif /* !CONFIG_HUGETLBFS */ | |
170 | ||
171 | #endif /* _LINUX_HUGETLB_H */ |