1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
#ifndef _LINUX_MMU_NOTIFIER_H
#define _LINUX_MMU_NOTIFIER_H
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/mm_types.h>
struct mmu_notifier;
struct mmu_notifier_ops;
#ifdef CONFIG_MMU_NOTIFIER
struct mmu_notifier_mm {
struct hlist_head list;
spinlock_t lock;
};
struct mmu_notifier_ops {
void (*release)(struct mmu_notifier *mn,
struct mm_struct *mm);
int (*clear_flush_young)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address);
int (*test_young)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address);
void (*change_pte)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address,
pte_t pte);
void (*invalidate_page)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address);
void (*invalidate_range_start)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start, unsigned long end);
void (*invalidate_range_end)(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start, unsigned long end);
};
struct mmu_notifier {
struct hlist_node hlist;
const struct mmu_notifier_ops *ops;
};
static inline int mm_has_notifiers(struct mm_struct *mm)
{
return unlikely(mm->mmu_notifier_mm);
}
extern int mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm);
extern int __mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm);
extern void mmu_notifier_unregister(struct mmu_notifier *mn,
struct mm_struct *mm);
extern void __mmu_notifier_mm_destroy(struct mm_struct *mm);
extern void __mmu_notifier_release(struct mm_struct *mm);
extern int __mmu_notifier_clear_flush_young(struct mm_struct *mm,
unsigned long address);
extern int __mmu_notifier_test_young(struct mm_struct *mm,
unsigned long address);
extern void __mmu_notifier_change_pte(struct mm_struct *mm,
unsigned long address, pte_t pte);
extern void __mmu_notifier_invalidate_page(struct mm_struct *mm,
unsigned long address);
extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end);
extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end);
static inline void mmu_notifier_release(struct mm_struct *mm)
{
if (mm_has_notifiers(mm))
__mmu_notifier_release(mm);
}
static inline int mmu_notifier_clear_flush_young(struct mm_struct *mm,
unsigned long address)
{
if (mm_has_notifiers(mm))
return __mmu_notifier_clear_flush_young(mm, address);
return 0;
}
static inline int mmu_notifier_test_young(struct mm_struct *mm,
unsigned long address)
{
if (mm_has_notifiers(mm))
return __mmu_notifier_test_young(mm, address);
return 0;
}
static inline void mmu_notifier_change_pte(struct mm_struct *mm,
unsigned long address, pte_t pte)
{
if (mm_has_notifiers(mm))
__mmu_notifier_change_pte(mm, address, pte);
}
static inline void mmu_notifier_invalidate_page(struct mm_struct *mm,
unsigned long address)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_page(mm, address);
}
static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_range_start(mm, start, end);
}
static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
if (mm_has_notifiers(mm))
__mmu_notifier_invalidate_range_end(mm, start, end);
}
static inline void mmu_notifier_mm_init(struct mm_struct *mm)
{
mm->mmu_notifier_mm = NULL;
}
static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
{
if (mm_has_notifiers(mm))
__mmu_notifier_mm_destroy(mm);
}
#define ptep_clear_flush_notify(__vma, __address, __ptep) \
({ \
pte_t __pte; \
struct vm_area_struct *___vma = __vma; \
unsigned long ___address = __address; \
__pte = ptep_clear_flush(___vma, ___address, __ptep); \
mmu_notifier_invalidate_page(___vma->vm_mm, ___address); \
__pte; \
})
#define pmdp_clear_flush_notify(__vma, __address, __pmdp) \
({ \
pmd_t __pmd; \
struct vm_area_struct *___vma = __vma; \
unsigned long ___address = __address; \
VM_BUG_ON(__address & ~HPAGE_PMD_MASK); \
mmu_notifier_invalidate_range_start(___vma->vm_mm, ___address, \
(__address)+HPAGE_PMD_SIZE);\
__pmd = pmdp_clear_flush(___vma, ___address, __pmdp); \
mmu_notifier_invalidate_range_end(___vma->vm_mm, ___address, \
(__address)+HPAGE_PMD_SIZE); \
__pmd; \
})
#define pmdp_splitting_flush_notify(__vma, __address, __pmdp) \
({ \
struct vm_area_struct *___vma = __vma; \
unsigned long ___address = __address; \
VM_BUG_ON(__address & ~HPAGE_PMD_MASK); \
mmu_notifier_invalidate_range_start(___vma->vm_mm, ___address, \
(__address)+HPAGE_PMD_SIZE);\
pmdp_splitting_flush(___vma, ___address, __pmdp); \
mmu_notifier_invalidate_range_end(___vma->vm_mm, ___address, \
(__address)+HPAGE_PMD_SIZE); \
})
#define ptep_clear_flush_young_notify(__vma, __address, __ptep) \
({ \
int __young; \
struct vm_area_struct *___vma = __vma; \
unsigned long ___address = __address; \
__young = ptep_clear_flush_young(___vma, ___address, __ptep); \
__young |= mmu_notifier_clear_flush_young(___vma->vm_mm, \
___address); \
__young; \
})
#define pmdp_clear_flush_young_notify(__vma, __address, __pmdp) \
({ \
int __young; \
struct vm_area_struct *___vma = __vma; \
unsigned long ___address = __address; \
__young = pmdp_clear_flush_young(___vma, ___address, __pmdp); \
__young |= mmu_notifier_clear_flush_young(___vma->vm_mm, \
___address); \
__young; \
})
#define set_pte_at_notify(__mm, __address, __ptep, __pte) \
({ \
struct mm_struct *___mm = __mm; \
unsigned long ___address = __address; \
pte_t ___pte = __pte; \
\
set_pte_at(___mm, ___address, __ptep, ___pte); \
mmu_notifier_change_pte(___mm, ___address, ___pte); \
})
#else
static inline void mmu_notifier_release(struct mm_struct *mm)
{
}
static inline int mmu_notifier_clear_flush_young(struct mm_struct *mm,
unsigned long address)
{
return 0;
}
static inline int mmu_notifier_test_young(struct mm_struct *mm,
unsigned long address)
{
return 0;
}
static inline void mmu_notifier_change_pte(struct mm_struct *mm,
unsigned long address, pte_t pte)
{
}
static inline void mmu_notifier_invalidate_page(struct mm_struct *mm,
unsigned long address)
{
}
static inline void mmu_notifier_invalidate_range_start(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
}
static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
}
static inline void mmu_notifier_mm_init(struct mm_struct *mm)
{
}
static inline void mmu_notifier_mm_destroy(struct mm_struct *mm)
{
}
#define ptep_clear_flush_young_notify ptep_clear_flush_young
#define pmdp_clear_flush_young_notify pmdp_clear_flush_young
#define ptep_clear_flush_notify ptep_clear_flush
#define pmdp_clear_flush_notify pmdp_clear_flush
#define pmdp_splitting_flush_notify pmdp_splitting_flush
#define set_pte_at_notify set_pte_at
#endif
#endif
|
