1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_PROFILE_H
3 #define _LINUX_PROFILE_H
4
5 #include <linux/kernel.h>
6 #include <linux/init.h>
7 #include <linux/cache.h>
8
9 #include <asm/errno.h>
10
11 #define CPU_PROFILING 1
12 #define SCHED_PROFILING 2
13 #define KVM_PROFILING 4
14
15 struct proc_dir_entry;
16 struct notifier_block;
17
18 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
19 int create_proc_profile(void);
20 #else
21 static inline int create_proc_profile(void)
22 {
23 return 0;
24 }
25 #endif
26
27 #ifdef CONFIG_PROFILING
28
29 extern int prof_on __read_mostly;
30
31 /* init basic kernel profiler */
32 int profile_init(void);
33 int profile_setup(char *str);
34 void profile_tick(int type);
35 int setup_profiling_timer(unsigned int multiplier);
36
37 /*
38 * Add multiple profiler hits to a given address:
39 */
40 void profile_hits(int type, void *ip, unsigned int nr_hits);
41
42 /*
43 * Single profiler hit:
44 */
45 static inline void profile_hit(int type, void *ip)
46 {
47 /*
48 * Speedup for the common (no profiling enabled) case:
49 */
50 if (unlikely(prof_on == type))
51 profile_hits(type, ip, 1);
52 }
53
54 struct task_struct;
55 struct mm_struct;
56
57 #else
58
59 #define prof_on 0
60
61 static inline int profile_init(void)
62 {
63 return 0;
64 }
65
66 static inline void profile_tick(int type)
67 {
68 return;
69 }
70
71 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
72 {
73 return;
74 }
75
76 static inline void profile_hit(int type, void *ip)
77 {
78 return;
79 }
80
81
82 #endif /* CONFIG_PROFILING */
83
84 #endif /* _LINUX_PROFILE_H */
85
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