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 pt_regs;
19 struct notifier_block;
20
21 #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
22 void create_prof_cpu_mask(void);
23 int create_proc_profile(void);
24 #else
create_prof_cpu_mask(void)25 static inline void create_prof_cpu_mask(void)
26 {
27 }
28
create_proc_profile(void)29 static inline int create_proc_profile(void)
30 {
31 return 0;
32 }
33 #endif
34
35 enum profile_type {
36 PROFILE_TASK_EXIT,
37 PROFILE_MUNMAP
38 };
39
40 #ifdef CONFIG_PROFILING
41
42 extern int prof_on __read_mostly;
43
44 /* init basic kernel profiler */
45 int profile_init(void);
46 int profile_setup(char *str);
47 void profile_tick(int type);
48 int setup_profiling_timer(unsigned int multiplier);
49
50 /*
51 * Add multiple profiler hits to a given address:
52 */
53 void profile_hits(int type, void *ip, unsigned int nr_hits);
54
55 /*
56 * Single profiler hit:
57 */
profile_hit(int type,void * ip)58 static inline void profile_hit(int type, void *ip)
59 {
60 /*
61 * Speedup for the common (no profiling enabled) case:
62 */
63 if (unlikely(prof_on == type))
64 profile_hits(type, ip, 1);
65 }
66
67 struct task_struct;
68 struct mm_struct;
69
70 /* task is in do_exit() */
71 void profile_task_exit(struct task_struct * task);
72
73 /* task is dead, free task struct ? Returns 1 if
74 * the task was taken, 0 if the task should be freed.
75 */
76 int profile_handoff_task(struct task_struct * task);
77
78 /* sys_munmap */
79 void profile_munmap(unsigned long addr);
80
81 int task_handoff_register(struct notifier_block * n);
82 int task_handoff_unregister(struct notifier_block * n);
83
84 int profile_event_register(enum profile_type, struct notifier_block * n);
85 int profile_event_unregister(enum profile_type, struct notifier_block * n);
86
87 struct pt_regs;
88
89 #else
90
91 #define prof_on 0
92
profile_init(void)93 static inline int profile_init(void)
94 {
95 return 0;
96 }
97
profile_tick(int type)98 static inline void profile_tick(int type)
99 {
100 return;
101 }
102
profile_hits(int type,void * ip,unsigned int nr_hits)103 static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
104 {
105 return;
106 }
107
profile_hit(int type,void * ip)108 static inline void profile_hit(int type, void *ip)
109 {
110 return;
111 }
112
task_handoff_register(struct notifier_block * n)113 static inline int task_handoff_register(struct notifier_block * n)
114 {
115 return -ENOSYS;
116 }
117
task_handoff_unregister(struct notifier_block * n)118 static inline int task_handoff_unregister(struct notifier_block * n)
119 {
120 return -ENOSYS;
121 }
122
profile_event_register(enum profile_type t,struct notifier_block * n)123 static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
124 {
125 return -ENOSYS;
126 }
127
profile_event_unregister(enum profile_type t,struct notifier_block * n)128 static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
129 {
130 return -ENOSYS;
131 }
132
133 #define profile_task_exit(a) do { } while (0)
134 #define profile_handoff_task(a) (0)
135 #define profile_munmap(a) do { } while (0)
136
137 #endif /* CONFIG_PROFILING */
138
139 #endif /* _LINUX_PROFILE_H */
140
