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