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 25 static inline void create_prof_cpu_mask(void) 26 { 27 } 28 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 */ 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 93 static inline int profile_init(void) 94 { 95 return 0; 96 } 97 98 static inline void profile_tick(int type) 99 { 100 return; 101 } 102 103 static inline void profile_hits(int type, void *ip, unsigned int nr_hits) 104 { 105 return; 106 } 107 108 static inline void profile_hit(int type, void *ip) 109 { 110 return; 111 } 112 113 static inline int task_handoff_register(struct notifier_block * n) 114 { 115 return -ENOSYS; 116 } 117 118 static inline int task_handoff_unregister(struct notifier_block * n) 119 { 120 return -ENOSYS; 121 } 122 123 static inline int profile_event_register(enum profile_type t, struct notifier_block * n) 124 { 125 return -ENOSYS; 126 } 127 128 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