1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _LINUX_PROFILE_H
3*4882a593Smuzhiyun #define _LINUX_PROFILE_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/kernel.h>
6*4882a593Smuzhiyun #include <linux/init.h>
7*4882a593Smuzhiyun #include <linux/cpumask.h>
8*4882a593Smuzhiyun #include <linux/cache.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <asm/errno.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #define CPU_PROFILING 1
13*4882a593Smuzhiyun #define SCHED_PROFILING 2
14*4882a593Smuzhiyun #define SLEEP_PROFILING 3
15*4882a593Smuzhiyun #define KVM_PROFILING 4
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun struct proc_dir_entry;
18*4882a593Smuzhiyun struct pt_regs;
19*4882a593Smuzhiyun struct notifier_block;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #if defined(CONFIG_PROFILING) && defined(CONFIG_PROC_FS)
22*4882a593Smuzhiyun void create_prof_cpu_mask(void);
23*4882a593Smuzhiyun int create_proc_profile(void);
24*4882a593Smuzhiyun #else
create_prof_cpu_mask(void)25*4882a593Smuzhiyun static inline void create_prof_cpu_mask(void)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
create_proc_profile(void)29*4882a593Smuzhiyun static inline int create_proc_profile(void)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun return 0;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun #endif
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun enum profile_type {
36*4882a593Smuzhiyun PROFILE_TASK_EXIT,
37*4882a593Smuzhiyun PROFILE_MUNMAP
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun #ifdef CONFIG_PROFILING
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun extern int prof_on __read_mostly;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* init basic kernel profiler */
45*4882a593Smuzhiyun int profile_init(void);
46*4882a593Smuzhiyun int profile_setup(char *str);
47*4882a593Smuzhiyun void profile_tick(int type);
48*4882a593Smuzhiyun int setup_profiling_timer(unsigned int multiplier);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun /*
51*4882a593Smuzhiyun * Add multiple profiler hits to a given address:
52*4882a593Smuzhiyun */
53*4882a593Smuzhiyun void profile_hits(int type, void *ip, unsigned int nr_hits);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun /*
56*4882a593Smuzhiyun * Single profiler hit:
57*4882a593Smuzhiyun */
profile_hit(int type,void * ip)58*4882a593Smuzhiyun static inline void profile_hit(int type, void *ip)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun /*
61*4882a593Smuzhiyun * Speedup for the common (no profiling enabled) case:
62*4882a593Smuzhiyun */
63*4882a593Smuzhiyun if (unlikely(prof_on == type))
64*4882a593Smuzhiyun profile_hits(type, ip, 1);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun struct task_struct;
68*4882a593Smuzhiyun struct mm_struct;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /* task is in do_exit() */
71*4882a593Smuzhiyun void profile_task_exit(struct task_struct * task);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun /* task is dead, free task struct ? Returns 1 if
74*4882a593Smuzhiyun * the task was taken, 0 if the task should be freed.
75*4882a593Smuzhiyun */
76*4882a593Smuzhiyun int profile_handoff_task(struct task_struct * task);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun /* sys_munmap */
79*4882a593Smuzhiyun void profile_munmap(unsigned long addr);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun int task_handoff_register(struct notifier_block * n);
82*4882a593Smuzhiyun int task_handoff_unregister(struct notifier_block * n);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun int profile_event_register(enum profile_type, struct notifier_block * n);
85*4882a593Smuzhiyun int profile_event_unregister(enum profile_type, struct notifier_block * n);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun struct pt_regs;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun #else
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun #define prof_on 0
92*4882a593Smuzhiyun
profile_init(void)93*4882a593Smuzhiyun static inline int profile_init(void)
94*4882a593Smuzhiyun {
95*4882a593Smuzhiyun return 0;
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
profile_tick(int type)98*4882a593Smuzhiyun static inline void profile_tick(int type)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun return;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
profile_hits(int type,void * ip,unsigned int nr_hits)103*4882a593Smuzhiyun static inline void profile_hits(int type, void *ip, unsigned int nr_hits)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun return;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
profile_hit(int type,void * ip)108*4882a593Smuzhiyun static inline void profile_hit(int type, void *ip)
109*4882a593Smuzhiyun {
110*4882a593Smuzhiyun return;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
task_handoff_register(struct notifier_block * n)113*4882a593Smuzhiyun static inline int task_handoff_register(struct notifier_block * n)
114*4882a593Smuzhiyun {
115*4882a593Smuzhiyun return -ENOSYS;
116*4882a593Smuzhiyun }
117*4882a593Smuzhiyun
task_handoff_unregister(struct notifier_block * n)118*4882a593Smuzhiyun static inline int task_handoff_unregister(struct notifier_block * n)
119*4882a593Smuzhiyun {
120*4882a593Smuzhiyun return -ENOSYS;
121*4882a593Smuzhiyun }
122*4882a593Smuzhiyun
profile_event_register(enum profile_type t,struct notifier_block * n)123*4882a593Smuzhiyun static inline int profile_event_register(enum profile_type t, struct notifier_block * n)
124*4882a593Smuzhiyun {
125*4882a593Smuzhiyun return -ENOSYS;
126*4882a593Smuzhiyun }
127*4882a593Smuzhiyun
profile_event_unregister(enum profile_type t,struct notifier_block * n)128*4882a593Smuzhiyun static inline int profile_event_unregister(enum profile_type t, struct notifier_block * n)
129*4882a593Smuzhiyun {
130*4882a593Smuzhiyun return -ENOSYS;
131*4882a593Smuzhiyun }
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun #define profile_task_exit(a) do { } while (0)
134*4882a593Smuzhiyun #define profile_handoff_task(a) (0)
135*4882a593Smuzhiyun #define profile_munmap(a) do { } while (0)
136*4882a593Smuzhiyun
137*4882a593Smuzhiyun #endif /* CONFIG_PROFILING */
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun #endif /* _LINUX_PROFILE_H */
140