Commit | Line | Data |
---|---|---|
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); | |
63551ae0 | 39 | int pmd_huge(pmd_t pmd); |
8f860591 ZY |
40 | void hugetlb_change_protection(struct vm_area_struct *vma, |
41 | unsigned long address, unsigned long end, pgprot_t newprot); | |
63551ae0 | 42 | |
1da177e4 LT |
43 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
44 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef DG |
45 | #endif |
46 | ||
47 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE | |
48 | #define hugetlb_free_pgd_range free_pgd_range | |
3915bcf3 DG |
49 | #else |
50 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, | |
51 | unsigned long end, unsigned long floor, | |
52 | unsigned long ceiling); | |
1da177e4 LT |
53 | #endif |
54 | ||
55 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE | |
42b88bef DG |
56 | /* |
57 | * If the arch doesn't supply something else, assume that hugepage | |
58 | * size aligned regions are ok without further preparation. | |
59 | */ | |
60 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len) | |
61 | { | |
62 | if (len & ~HPAGE_MASK) | |
63 | return -EINVAL; | |
64 | if (addr & ~HPAGE_MASK) | |
65 | return -EINVAL; | |
66 | return 0; | |
67 | } | |
1da177e4 LT |
68 | #else |
69 | int prepare_hugepage_range(unsigned long addr, unsigned long len); | |
70 | #endif | |
71 | ||
63551ae0 DG |
72 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
73 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) | |
74 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) | |
75 | #else | |
76 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
77 | pte_t *ptep, pte_t pte); | |
78 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
79 | pte_t *ptep); | |
80 | #endif | |
81 | ||
82 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK | |
83 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) | |
84 | #else | |
85 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); | |
86 | #endif | |
87 | ||
1da177e4 LT |
88 | #else /* !CONFIG_HUGETLB_PAGE */ |
89 | ||
90 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | static inline unsigned long hugetlb_total_pages(void) | |
95 | { | |
96 | return 0; | |
97 | } | |
98 | ||
99 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) | |
100 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) | |
101 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) | |
102 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) | |
1da177e4 | 103 | #define unmap_hugepage_range(vma, start, end) BUG() |
1da177e4 LT |
104 | #define hugetlb_report_meminfo(buf) 0 |
105 | #define hugetlb_report_node_meminfo(n, buf) 0 | |
106 | #define follow_huge_pmd(mm, addr, pmd, write) NULL | |
1da177e4 LT |
107 | #define prepare_hugepage_range(addr, len) (-EINVAL) |
108 | #define pmd_huge(x) 0 | |
109 | #define is_hugepage_only_range(mm, addr, len) 0 | |
9da61aef | 110 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
ac9b9c66 | 111 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
1da177e4 | 112 | |
8f860591 ZY |
113 | #define hugetlb_change_protection(vma, address, end, newprot) |
114 | ||
1da177e4 | 115 | #ifndef HPAGE_MASK |
51c6f666 RH |
116 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
117 | #define HPAGE_SIZE PAGE_SIZE | |
1da177e4 LT |
118 | #endif |
119 | ||
120 | #endif /* !CONFIG_HUGETLB_PAGE */ | |
121 | ||
122 | #ifdef CONFIG_HUGETLBFS | |
123 | struct hugetlbfs_config { | |
124 | uid_t uid; | |
125 | gid_t gid; | |
126 | umode_t mode; | |
127 | long nr_blocks; | |
128 | long nr_inodes; | |
129 | }; | |
130 | ||
131 | struct hugetlbfs_sb_info { | |
132 | long max_blocks; /* blocks allowed */ | |
133 | long free_blocks; /* blocks free */ | |
134 | long max_inodes; /* inodes allowed */ | |
135 | long free_inodes; /* inodes free */ | |
136 | spinlock_t stat_lock; | |
137 | }; | |
138 | ||
139 | ||
140 | struct hugetlbfs_inode_info { | |
141 | struct shared_policy policy; | |
b45b5bd6 DG |
142 | /* Protected by the (global) hugetlb_lock */ |
143 | unsigned long prereserved_hpages; | |
1da177e4 LT |
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); | |
b45b5bd6 DG |
160 | int hugetlb_extend_reservation(struct hugetlbfs_inode_info *info, |
161 | unsigned long atleast_hpages); | |
162 | void hugetlb_truncate_reservation(struct hugetlbfs_inode_info *info, | |
163 | unsigned long atmost_hpages); | |
1da177e4 LT |
164 | int hugetlb_get_quota(struct address_space *mapping); |
165 | void hugetlb_put_quota(struct address_space *mapping); | |
166 | ||
167 | static inline int is_file_hugepages(struct file *file) | |
168 | { | |
169 | return file->f_op == &hugetlbfs_file_operations; | |
170 | } | |
171 | ||
172 | static inline void set_file_hugepages(struct file *file) | |
173 | { | |
174 | file->f_op = &hugetlbfs_file_operations; | |
175 | } | |
176 | #else /* !CONFIG_HUGETLBFS */ | |
177 | ||
178 | #define is_file_hugepages(file) 0 | |
179 | #define set_file_hugepages(file) BUG() | |
180 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) | |
181 | ||
182 | #endif /* !CONFIG_HUGETLBFS */ | |
183 | ||
184 | #endif /* _LINUX_HUGETLB_H */ |