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/cpumask.h>
8 #include <linux/cache.h>
9
10 #include <asm/errno.h>
11
12 #define CPU_PROFILING 1
13 #define SCHED_PROFILING 2
14 #define SLEEP_PROFILING 3
15 #define KVM_PROFILING 4
16
17 struct proc_dir_entry;
18 struct notifier_block;
19
20 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
21 int create_proc_profile(void);
22 #else
create_proc_profile(void)23 static inline int create_proc_profile(void)
24 {
25 return 0;
26 }
27 #endif
28
29 #ifdef CONFIG_PROFILING
30
31 extern int prof_on __read_mostly;
32
33 /* init basic kernel profiler */
34 int profile_init(void);
35 int profile_setup(char *str);
36 void profile_tick(int type);
37 int setup_profiling_timer(unsigned int multiplier);
38
39 /*
40 * Add multiple profiler hits to a given address:
41 */
42 void profile_hits(int type, void *ip, unsigned int nr_hits);
43
44 /*
45 * Single profiler hit:
46 */
profile_hit(int type,void * ip)47 static inline void profile_hit(int type, void *ip)
48 {
49 /*
50 * Speedup for the common (no profiling enabled) case:
51 */
52 if (unlikely(prof_on == type))
53 profile_hits(type, ip, 1);
54 }
55
56 struct task_struct;
57 struct mm_struct;
58
59 #else
60
61 #define prof_on 0
62
profile_init(void)63 static inline int profile_init(void)
64 {
65 return 0;
66 }
67
profile_tick(int type)68 static inline void profile_tick(int type)
69 {
70 return;
71 }
72
profile_hits(int type,void * ip,unsigned int nr_hits)73 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
74 {
75 return;
76 }
77
profile_hit(int type,void * ip)78 static inline void profile_hit(int type, void *ip)
79 {
80 return;
81 }
82
83
84 #endif /* CONFIG_PROFILING */
85
86 #endif /* _LINUX_PROFILE_H */
87