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