This source file includes following definitions.
- vmalloc_init
- vmalloc_nr_pages
- __vmalloc_node_flags_caller
- get_vm_area_size
- set_vm_flush_reset_perms
- map_kernel_range_noflush
- unmap_kernel_range_noflush
- unmap_kernel_range
- set_vm_flush_reset_perms
- pcpu_get_vm_areas
- pcpu_free_vm_areas
1
2 #ifndef _LINUX_VMALLOC_H
3 #define _LINUX_VMALLOC_H
4
5 #include <linux/spinlock.h>
6 #include <linux/init.h>
7 #include <linux/list.h>
8 #include <linux/llist.h>
9 #include <asm/page.h>
10 #include <linux/rbtree.h>
11 #include <linux/overflow.h>
12
13 struct vm_area_struct;
14 struct notifier_block;
15
16
17 #define VM_IOREMAP 0x00000001
18 #define VM_ALLOC 0x00000002
19 #define VM_MAP 0x00000004
20 #define VM_USERMAP 0x00000008
21 #define VM_DMA_COHERENT 0x00000010
22 #define VM_UNINITIALIZED 0x00000020
23 #define VM_NO_GUARD 0x00000040
24 #define VM_KASAN 0x00000080
25
26
27
28
29 #define VM_FLUSH_RESET_PERMS 0x00000100
30
31
32
33
34
35
36
37 #ifndef IOREMAP_MAX_ORDER
38 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT)
39 #endif
40
41 struct vm_struct {
42 struct vm_struct *next;
43 void *addr;
44 unsigned long size;
45 unsigned long flags;
46 struct page **pages;
47 unsigned int nr_pages;
48 phys_addr_t phys_addr;
49 const void *caller;
50 };
51
52 struct vmap_area {
53 unsigned long va_start;
54 unsigned long va_end;
55
56 struct rb_node rb_node;
57 struct list_head list;
58
59
60
61
62
63
64
65
66 union {
67 unsigned long subtree_max_size;
68 struct vm_struct *vm;
69 struct llist_node purge_list;
70 };
71 };
72
73
74
75
76 extern void vm_unmap_ram(const void *mem, unsigned int count);
77 extern void *vm_map_ram(struct page **pages, unsigned int count,
78 int node, pgprot_t prot);
79 extern void vm_unmap_aliases(void);
80
81 #ifdef CONFIG_MMU
82 extern void __init vmalloc_init(void);
83 extern unsigned long vmalloc_nr_pages(void);
84 #else
85 static inline void vmalloc_init(void)
86 {
87 }
88 static inline unsigned long vmalloc_nr_pages(void) { return 0; }
89 #endif
90
91 extern void *vmalloc(unsigned long size);
92 extern void *vzalloc(unsigned long size);
93 extern void *vmalloc_user(unsigned long size);
94 extern void *vmalloc_node(unsigned long size, int node);
95 extern void *vzalloc_node(unsigned long size, int node);
96 extern void *vmalloc_exec(unsigned long size);
97 extern void *vmalloc_32(unsigned long size);
98 extern void *vmalloc_32_user(unsigned long size);
99 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
100 extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
101 unsigned long start, unsigned long end, gfp_t gfp_mask,
102 pgprot_t prot, unsigned long vm_flags, int node,
103 const void *caller);
104 #ifndef CONFIG_MMU
105 extern void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags);
106 static inline void *__vmalloc_node_flags_caller(unsigned long size, int node,
107 gfp_t flags, void *caller)
108 {
109 return __vmalloc_node_flags(size, node, flags);
110 }
111 #else
112 extern void *__vmalloc_node_flags_caller(unsigned long size,
113 int node, gfp_t flags, void *caller);
114 #endif
115
116 extern void vfree(const void *addr);
117 extern void vfree_atomic(const void *addr);
118
119 extern void *vmap(struct page **pages, unsigned int count,
120 unsigned long flags, pgprot_t prot);
121 extern void vunmap(const void *addr);
122
123 extern int remap_vmalloc_range_partial(struct vm_area_struct *vma,
124 unsigned long uaddr, void *kaddr,
125 unsigned long pgoff, unsigned long size);
126
127 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
128 unsigned long pgoff);
129 void vmalloc_sync_mappings(void);
130 void vmalloc_sync_unmappings(void);
131
132
133
134
135
136 static inline size_t get_vm_area_size(const struct vm_struct *area)
137 {
138 if (!(area->flags & VM_NO_GUARD))
139
140 return area->size - PAGE_SIZE;
141 else
142 return area->size;
143
144 }
145
146 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
147 extern struct vm_struct *get_vm_area_caller(unsigned long size,
148 unsigned long flags, const void *caller);
149 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
150 unsigned long start, unsigned long end);
151 extern struct vm_struct *__get_vm_area_caller(unsigned long size,
152 unsigned long flags,
153 unsigned long start, unsigned long end,
154 const void *caller);
155 extern struct vm_struct *remove_vm_area(const void *addr);
156 extern struct vm_struct *find_vm_area(const void *addr);
157
158 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
159 struct page **pages);
160 #ifdef CONFIG_MMU
161 extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
162 pgprot_t prot, struct page **pages);
163 extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
164 extern void unmap_kernel_range(unsigned long addr, unsigned long size);
165 static inline void set_vm_flush_reset_perms(void *addr)
166 {
167 struct vm_struct *vm = find_vm_area(addr);
168
169 if (vm)
170 vm->flags |= VM_FLUSH_RESET_PERMS;
171 }
172 #else
173 static inline int
174 map_kernel_range_noflush(unsigned long start, unsigned long size,
175 pgprot_t prot, struct page **pages)
176 {
177 return size >> PAGE_SHIFT;
178 }
179 static inline void
180 unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
181 {
182 }
183 static inline void
184 unmap_kernel_range(unsigned long addr, unsigned long size)
185 {
186 }
187 static inline void set_vm_flush_reset_perms(void *addr)
188 {
189 }
190 #endif
191
192
193 extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes);
194 extern void free_vm_area(struct vm_struct *area);
195
196
197 extern long vread(char *buf, char *addr, unsigned long count);
198 extern long vwrite(char *buf, char *addr, unsigned long count);
199
200
201
202
203 extern struct list_head vmap_area_list;
204 extern __init void vm_area_add_early(struct vm_struct *vm);
205 extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
206
207 #ifdef CONFIG_SMP
208 # ifdef CONFIG_MMU
209 struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
210 const size_t *sizes, int nr_vms,
211 size_t align);
212
213 void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
214 # else
215 static inline struct vm_struct **
216 pcpu_get_vm_areas(const unsigned long *offsets,
217 const size_t *sizes, int nr_vms,
218 size_t align)
219 {
220 return NULL;
221 }
222
223 static inline void
224 pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
225 {
226 }
227 # endif
228 #endif
229
230 #ifdef CONFIG_MMU
231 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
232 #else
233 #define VMALLOC_TOTAL 0UL
234 #endif
235
236 int register_vmap_purge_notifier(struct notifier_block *nb);
237 int unregister_vmap_purge_notifier(struct notifier_block *nb);
238
239 #endif