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
create_proc_profile(void)21 static inline int create_proc_profile(void)
22 {
23 return 0;
24 }
25 #endif
26
27 enum profile_type {
28 PROFILE_TASK_EXIT,
29 PROFILE_MUNMAP
30 };
31
32 #ifdef CONFIG_PROFILING
33
34 extern int prof_on __read_mostly;
35
36 /* init basic kernel profiler */
37 int profile_init(void);
38 int profile_setup(char *str);
39 void profile_tick(int type);
40 int setup_profiling_timer(unsigned int multiplier);
41
42 /*
43 * Add multiple profiler hits to a given address:
44 */
45 void profile_hits(int type, void *ip, unsigned int nr_hits);
46
47 /*
48 * Single profiler hit:
49 */
profile_hit(int type,void * ip)50 static inline void profile_hit(int type, void *ip)
51 {
52 /*
53 * Speedup for the common (no profiling enabled) case:
54 */
55 if (unlikely(prof_on == type))
56 profile_hits(type, ip, 1);
57 }
58
59 struct task_struct;
60 struct mm_struct;
61
62 /* task is in do_exit() */
63 void profile_task_exit(struct task_struct * task);
64
65 /* sys_munmap */
66 void profile_munmap(unsigned long addr);
67
68 int profile_event_register(enum profile_type, struct notifier_block * n);
69 int profile_event_unregister(enum profile_type, struct notifier_block * n);
70
71 #else
72
73 #define prof_on 0
74
profile_init(void)75 static inline int profile_init(void)
76 {
77 return 0;
78 }
79
profile_tick(int type)80 static inline void profile_tick(int type)
81 {
82 return;
83 }
84
profile_hits(int type,void * ip,unsigned int nr_hits)85 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
86 {
87 return;
88 }
89
profile_hit(int type,void * ip)90 static inline void profile_hit(int type, void *ip)
91 {
92 return;
93 }
94
profile_event_register(enum profile_type t,struct notifier_block * n)95 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
96 {
97 return -ENOSYS;
98 }
99
profile_event_unregister(enum profile_type t,struct notifier_block * n)100 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
101 {
102 return -ENOSYS;
103 }
104
105 #define profile_task_exit(a) do { } while (0)
106 #define profile_munmap(a) do { } while (0)
107
108 #endif /* CONFIG_PROFILING */
109
110 #endif /* _LINUX_PROFILE_H */
111