Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 1 | /* |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 2 | * Performance events: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 3 | * |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 4 | * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de> |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 5 | * Copyright (C) 2008-2011, Red Hat, Inc., Ingo Molnar |
| 6 | * Copyright (C) 2008-2011, Red Hat, Inc., Peter Zijlstra |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 7 | * |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 8 | * Data type definitions, declarations, prototypes. |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 9 | * |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 10 | * Started by: Thomas Gleixner and Ingo Molnar |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 11 | * |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 12 | * For licencing details see kernel-base/COPYING |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 13 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 14 | #ifndef _LINUX_PERF_EVENT_H |
| 15 | #define _LINUX_PERF_EVENT_H |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 16 | |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 17 | #include <uapi/linux/perf_event.h> |
Peter Zijlstra | a4be7c2 | 2009-08-19 11:18:27 +0200 | [diff] [blame] | 18 | |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 19 | /* |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 20 | * Kernel-internal data types and definitions: |
Ingo Molnar | 9f66a38 | 2008-12-10 12:33:23 +0100 | [diff] [blame] | 21 | */ |
| 22 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 23 | #ifdef CONFIG_PERF_EVENTS |
| 24 | # include <asm/perf_event.h> |
Peter Zijlstra | 7be7923 | 2010-06-09 11:57:23 +0200 | [diff] [blame] | 25 | # include <asm/local64.h> |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 26 | #endif |
| 27 | |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 28 | struct perf_guest_info_callbacks { |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 29 | int (*is_in_guest)(void); |
| 30 | int (*is_user_mode)(void); |
| 31 | unsigned long (*get_guest_ip)(void); |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 32 | }; |
| 33 | |
Arnd Bergmann | 2ff6cfd | 2009-12-07 17:12:58 +0100 | [diff] [blame] | 34 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
| 35 | #include <asm/hw_breakpoint.h> |
| 36 | #endif |
| 37 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 38 | #include <linux/list.h> |
| 39 | #include <linux/mutex.h> |
| 40 | #include <linux/rculist.h> |
| 41 | #include <linux/rcupdate.h> |
| 42 | #include <linux/spinlock.h> |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 43 | #include <linux/hrtimer.h> |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 44 | #include <linux/fs.h> |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 45 | #include <linux/pid_namespace.h> |
Peter Zijlstra | 906010b | 2009-09-21 16:08:49 +0200 | [diff] [blame] | 46 | #include <linux/workqueue.h> |
Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame] | 47 | #include <linux/ftrace.h> |
Peter Zijlstra | 85cfabb | 2010-03-11 13:06:56 +0100 | [diff] [blame] | 48 | #include <linux/cpu.h> |
Peter Zijlstra | e360adb | 2010-10-14 14:01:34 +0800 | [diff] [blame] | 49 | #include <linux/irq_work.h> |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 50 | #include <linux/static_key.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 51 | #include <linux/atomic.h> |
Jiri Olsa | 641cc93 | 2012-03-15 20:09:14 +0100 | [diff] [blame] | 52 | #include <linux/sysfs.h> |
Jiri Olsa | 4018994 | 2012-08-07 15:20:37 +0200 | [diff] [blame] | 53 | #include <linux/perf_regs.h> |
Peter Zijlstra | fa58815 | 2010-05-18 10:54:20 +0200 | [diff] [blame] | 54 | #include <asm/local.h> |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 55 | |
Peter Zijlstra | f9188e0 | 2009-06-18 22:20:52 +0200 | [diff] [blame] | 56 | struct perf_callchain_entry { |
| 57 | __u64 nr; |
| 58 | __u64 ip[PERF_MAX_STACK_DEPTH]; |
| 59 | }; |
| 60 | |
Frederic Weisbecker | 3a43ce6 | 2009-08-08 04:26:37 +0200 | [diff] [blame] | 61 | struct perf_raw_record { |
| 62 | u32 size; |
| 63 | void *data; |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 66 | /* |
| 67 | * single taken branch record layout: |
| 68 | * |
| 69 | * from: source instruction (may not always be a branch insn) |
| 70 | * to: branch target |
| 71 | * mispred: branch target was mispredicted |
| 72 | * predicted: branch target was predicted |
| 73 | * |
| 74 | * support for mispred, predicted is optional. In case it |
| 75 | * is not supported mispred = predicted = 0. |
Andi Kleen | 135c561 | 2013-06-17 17:36:51 -0700 | [diff] [blame] | 76 | * |
| 77 | * in_tx: running in a hardware transaction |
| 78 | * abort: aborting a hardware transaction |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 79 | */ |
Peter Zijlstra | caff2be | 2010-03-03 12:02:30 +0100 | [diff] [blame] | 80 | struct perf_branch_entry { |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 81 | __u64 from; |
| 82 | __u64 to; |
| 83 | __u64 mispred:1, /* target mispredicted */ |
| 84 | predicted:1,/* target predicted */ |
Andi Kleen | 135c561 | 2013-06-17 17:36:51 -0700 | [diff] [blame] | 85 | in_tx:1, /* in transaction */ |
| 86 | abort:1, /* transaction abort */ |
| 87 | reserved:60; |
Peter Zijlstra | caff2be | 2010-03-03 12:02:30 +0100 | [diff] [blame] | 88 | }; |
| 89 | |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 90 | /* |
| 91 | * branch stack layout: |
| 92 | * nr: number of taken branches stored in entries[] |
| 93 | * |
| 94 | * Note that nr can vary from sample to sample |
| 95 | * branches (to, from) are stored from most recent |
| 96 | * to least recent, i.e., entries[0] contains the most |
| 97 | * recent branch. |
| 98 | */ |
Peter Zijlstra | caff2be | 2010-03-03 12:02:30 +0100 | [diff] [blame] | 99 | struct perf_branch_stack { |
| 100 | __u64 nr; |
| 101 | struct perf_branch_entry entries[0]; |
| 102 | }; |
| 103 | |
Jiri Olsa | 4018994 | 2012-08-07 15:20:37 +0200 | [diff] [blame] | 104 | struct perf_regs_user { |
| 105 | __u64 abi; |
| 106 | struct pt_regs *regs; |
| 107 | }; |
| 108 | |
Paul Mackerras | f3dfd26 | 2009-02-26 22:43:46 +1100 | [diff] [blame] | 109 | struct task_struct; |
| 110 | |
Stephane Eranian | efc9f05 | 2011-06-06 16:57:03 +0200 | [diff] [blame] | 111 | /* |
| 112 | * extra PMU register associated with an event |
| 113 | */ |
| 114 | struct hw_perf_event_extra { |
| 115 | u64 config; /* register value */ |
| 116 | unsigned int reg; /* register address or index */ |
| 117 | int alloc; /* extra register already allocated */ |
| 118 | int idx; /* index in shared_regs->regs[] */ |
| 119 | }; |
| 120 | |
Andrew Hunter | 43b45780 | 2013-05-23 11:07:03 -0700 | [diff] [blame] | 121 | struct event_constraint; |
| 122 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 123 | /** |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 124 | * struct hw_perf_event - performance event hardware details: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 125 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 126 | struct hw_perf_event { |
| 127 | #ifdef CONFIG_PERF_EVENTS |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 128 | union { |
| 129 | struct { /* hardware */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 130 | u64 config; |
Stephane Eranian | 447a194 | 2010-02-01 14:50:01 +0200 | [diff] [blame] | 131 | u64 last_tag; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 132 | unsigned long config_base; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 133 | unsigned long event_base; |
Vince Weaver | c48b605 | 2012-03-01 17:28:14 -0500 | [diff] [blame] | 134 | int event_base_rdpmc; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 135 | int idx; |
Stephane Eranian | 447a194 | 2010-02-01 14:50:01 +0200 | [diff] [blame] | 136 | int last_cpu; |
Stephane Eranian | 9fac2cf | 2013-01-24 16:10:27 +0100 | [diff] [blame] | 137 | int flags; |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 138 | |
Stephane Eranian | efc9f05 | 2011-06-06 16:57:03 +0200 | [diff] [blame] | 139 | struct hw_perf_event_extra extra_reg; |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 140 | struct hw_perf_event_extra branch_reg; |
Andrew Hunter | 43b45780 | 2013-05-23 11:07:03 -0700 | [diff] [blame] | 141 | |
| 142 | struct event_constraint *constraint; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 143 | }; |
Soeren Sandmann | 721a669 | 2009-09-15 14:33:08 +0200 | [diff] [blame] | 144 | struct { /* software */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 145 | struct hrtimer hrtimer; |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 146 | }; |
Oleg Nesterov | f22c1bb | 2013-02-02 16:27:52 +0100 | [diff] [blame] | 147 | struct { /* tracepoint */ |
| 148 | struct task_struct *tp_target; |
| 149 | /* for tp_event->class */ |
| 150 | struct list_head tp_list; |
| 151 | }; |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 152 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
Frederic Weisbecker | 45a7337 | 2010-06-23 23:00:37 +0200 | [diff] [blame] | 153 | struct { /* breakpoint */ |
Peter Zijlstra | d580ff8 | 2010-10-14 17:43:23 +0200 | [diff] [blame] | 154 | /* |
| 155 | * Crufty hack to avoid the chicken and egg |
| 156 | * problem hw_breakpoint has with context |
| 157 | * creation and event initalization. |
| 158 | */ |
| 159 | struct task_struct *bp_target; |
Oleg Nesterov | f22c1bb | 2013-02-02 16:27:52 +0100 | [diff] [blame] | 160 | struct arch_hw_breakpoint info; |
| 161 | struct list_head bp_list; |
Frederic Weisbecker | 45a7337 | 2010-06-23 23:00:37 +0200 | [diff] [blame] | 162 | }; |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 163 | #endif |
Peter Zijlstra | d6d020e | 2009-03-13 12:21:35 +0100 | [diff] [blame] | 164 | }; |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 165 | int state; |
Peter Zijlstra | e785059 | 2010-05-21 14:43:08 +0200 | [diff] [blame] | 166 | local64_t prev_count; |
Peter Zijlstra | b23f332 | 2009-06-02 15:13:03 +0200 | [diff] [blame] | 167 | u64 sample_period; |
Peter Zijlstra | 9e350de | 2009-06-10 21:34:59 +0200 | [diff] [blame] | 168 | u64 last_period; |
Peter Zijlstra | e785059 | 2010-05-21 14:43:08 +0200 | [diff] [blame] | 169 | local64_t period_left; |
Stephane Eranian | e050e3f | 2012-01-26 17:03:19 +0100 | [diff] [blame] | 170 | u64 interrupts_seq; |
Peter Zijlstra | 60db5e0 | 2009-05-15 15:19:28 +0200 | [diff] [blame] | 171 | u64 interrupts; |
Peter Zijlstra | 6a24ed6c | 2009-06-05 18:01:29 +0200 | [diff] [blame] | 172 | |
Peter Zijlstra | abd5071 | 2010-01-26 18:50:16 +0100 | [diff] [blame] | 173 | u64 freq_time_stamp; |
| 174 | u64 freq_count_stamp; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 175 | #endif |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 176 | }; |
| 177 | |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 178 | /* |
| 179 | * hw_perf_event::state flags |
| 180 | */ |
| 181 | #define PERF_HES_STOPPED 0x01 /* the counter is stopped */ |
| 182 | #define PERF_HES_UPTODATE 0x02 /* event->count up-to-date */ |
| 183 | #define PERF_HES_ARCH 0x04 |
| 184 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 185 | struct perf_event; |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 186 | |
Peter Zijlstra | 8d2cacb | 2010-05-25 17:49:05 +0200 | [diff] [blame] | 187 | /* |
| 188 | * Common implementation detail of pmu::{start,commit,cancel}_txn |
| 189 | */ |
| 190 | #define PERF_EVENT_TXN 0x1 |
Lin Ming | 6bde9b6 | 2010-04-23 13:56:00 +0800 | [diff] [blame] | 191 | |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 192 | /** |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 193 | * struct pmu - generic performance monitoring unit |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 194 | */ |
Robert Richter | 4aeb0b4 | 2009-04-29 12:47:03 +0200 | [diff] [blame] | 195 | struct pmu { |
Peter Zijlstra | b0a873e | 2010-06-11 13:35:08 +0200 | [diff] [blame] | 196 | struct list_head entry; |
| 197 | |
Peter Zijlstra | abe4340 | 2010-11-17 23:17:37 +0100 | [diff] [blame] | 198 | struct device *dev; |
Peter Zijlstra | 0c9d42e | 2011-11-20 23:30:47 +0100 | [diff] [blame] | 199 | const struct attribute_group **attr_groups; |
Mischa Jonker | 03d8e80 | 2013-06-04 11:45:48 +0200 | [diff] [blame] | 200 | const char *name; |
Peter Zijlstra | 2e80a82 | 2010-11-17 23:17:36 +0100 | [diff] [blame] | 201 | int type; |
| 202 | |
Peter Zijlstra | 108b02c | 2010-09-06 14:32:03 +0200 | [diff] [blame] | 203 | int * __percpu pmu_disable_count; |
| 204 | struct perf_cpu_context * __percpu pmu_cpu_context; |
Peter Zijlstra | 8dc85d5 | 2010-09-02 16:50:03 +0200 | [diff] [blame] | 205 | int task_ctx_nr; |
Stephane Eranian | 62b8563 | 2013-04-03 14:21:34 +0200 | [diff] [blame] | 206 | int hrtimer_interval_ms; |
Peter Zijlstra | 33696fc | 2010-06-14 08:49:00 +0200 | [diff] [blame] | 207 | |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 208 | /* |
| 209 | * Fully disable/enable this PMU, can be used to protect from the PMI |
| 210 | * as well as for lazy/batch writing of the MSRs. |
| 211 | */ |
Peter Zijlstra | ad5133b | 2010-06-15 12:22:39 +0200 | [diff] [blame] | 212 | void (*pmu_enable) (struct pmu *pmu); /* optional */ |
| 213 | void (*pmu_disable) (struct pmu *pmu); /* optional */ |
Peter Zijlstra | 33696fc | 2010-06-14 08:49:00 +0200 | [diff] [blame] | 214 | |
Peter Zijlstra | b0a873e | 2010-06-11 13:35:08 +0200 | [diff] [blame] | 215 | /* |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 216 | * Try and initialize the event for this PMU. |
Peter Zijlstra | 24cd7f5 | 2010-06-11 17:32:03 +0200 | [diff] [blame] | 217 | * Should return -ENOENT when the @event doesn't match this PMU. |
Peter Zijlstra | b0a873e | 2010-06-11 13:35:08 +0200 | [diff] [blame] | 218 | */ |
| 219 | int (*event_init) (struct perf_event *event); |
| 220 | |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 221 | #define PERF_EF_START 0x01 /* start the counter when adding */ |
| 222 | #define PERF_EF_RELOAD 0x02 /* reload the counter when starting */ |
| 223 | #define PERF_EF_UPDATE 0x04 /* update the counter when stopping */ |
| 224 | |
| 225 | /* |
| 226 | * Adds/Removes a counter to/from the PMU, can be done inside |
| 227 | * a transaction, see the ->*_txn() methods. |
| 228 | */ |
| 229 | int (*add) (struct perf_event *event, int flags); |
| 230 | void (*del) (struct perf_event *event, int flags); |
| 231 | |
| 232 | /* |
| 233 | * Starts/Stops a counter present on the PMU. The PMI handler |
| 234 | * should stop the counter when perf_event_overflow() returns |
| 235 | * !0. ->start() will be used to continue. |
| 236 | */ |
| 237 | void (*start) (struct perf_event *event, int flags); |
| 238 | void (*stop) (struct perf_event *event, int flags); |
| 239 | |
| 240 | /* |
| 241 | * Updates the counter value of the event. |
| 242 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 243 | void (*read) (struct perf_event *event); |
Lin Ming | 6bde9b6 | 2010-04-23 13:56:00 +0800 | [diff] [blame] | 244 | |
| 245 | /* |
Peter Zijlstra | 24cd7f5 | 2010-06-11 17:32:03 +0200 | [diff] [blame] | 246 | * Group events scheduling is treated as a transaction, add |
| 247 | * group events as a whole and perform one schedulability test. |
| 248 | * If the test fails, roll back the whole group |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 249 | * |
| 250 | * Start the transaction, after this ->add() doesn't need to |
Peter Zijlstra | 24cd7f5 | 2010-06-11 17:32:03 +0200 | [diff] [blame] | 251 | * do schedulability tests. |
Lin Ming | 6bde9b6 | 2010-04-23 13:56:00 +0800 | [diff] [blame] | 252 | */ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 253 | void (*start_txn) (struct pmu *pmu); /* optional */ |
Peter Zijlstra | 8d2cacb | 2010-05-25 17:49:05 +0200 | [diff] [blame] | 254 | /* |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 255 | * If ->start_txn() disabled the ->add() schedulability test |
Peter Zijlstra | 8d2cacb | 2010-05-25 17:49:05 +0200 | [diff] [blame] | 256 | * then ->commit_txn() is required to perform one. On success |
| 257 | * the transaction is closed. On error the transaction is kept |
| 258 | * open until ->cancel_txn() is called. |
| 259 | */ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 260 | int (*commit_txn) (struct pmu *pmu); /* optional */ |
Peter Zijlstra | 8d2cacb | 2010-05-25 17:49:05 +0200 | [diff] [blame] | 261 | /* |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 262 | * Will cancel the transaction, assumes ->del() is called |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 263 | * for each successful ->add() during the transaction. |
Peter Zijlstra | 8d2cacb | 2010-05-25 17:49:05 +0200 | [diff] [blame] | 264 | */ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 265 | void (*cancel_txn) (struct pmu *pmu); /* optional */ |
Peter Zijlstra | 35edc2a | 2011-11-20 20:36:02 +0100 | [diff] [blame] | 266 | |
| 267 | /* |
| 268 | * Will return the value for perf_event_mmap_page::index for this event, |
| 269 | * if no implementation is provided it will default to: event->hw.idx + 1. |
| 270 | */ |
| 271 | int (*event_idx) (struct perf_event *event); /*optional */ |
Stephane Eranian | d010b33 | 2012-02-09 23:21:00 +0100 | [diff] [blame] | 272 | |
| 273 | /* |
| 274 | * flush branch stack on context-switches (needed in cpu-wide mode) |
| 275 | */ |
| 276 | void (*flush_branch_stack) (void); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 277 | }; |
| 278 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 279 | /** |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 280 | * enum perf_event_active_state - the states of a event |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 281 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 282 | enum perf_event_active_state { |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 283 | PERF_EVENT_STATE_ERROR = -2, |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 284 | PERF_EVENT_STATE_OFF = -1, |
| 285 | PERF_EVENT_STATE_INACTIVE = 0, |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 286 | PERF_EVENT_STATE_ACTIVE = 1, |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 287 | }; |
| 288 | |
Ingo Molnar | 9b51f66 | 2008-12-12 13:49:45 +0100 | [diff] [blame] | 289 | struct file; |
Peter Zijlstra | 453f19e | 2009-11-20 22:19:43 +0100 | [diff] [blame] | 290 | struct perf_sample_data; |
| 291 | |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 292 | typedef void (*perf_overflow_handler_t)(struct perf_event *, |
Frederic Weisbecker | b326e95 | 2009-12-05 09:44:31 +0100 | [diff] [blame] | 293 | struct perf_sample_data *, |
| 294 | struct pt_regs *regs); |
| 295 | |
Frederic Weisbecker | d6f962b | 2010-01-10 01:25:51 +0100 | [diff] [blame] | 296 | enum perf_group_flag { |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 297 | PERF_GROUP_SOFTWARE = 0x1, |
Frederic Weisbecker | d6f962b | 2010-01-10 01:25:51 +0100 | [diff] [blame] | 298 | }; |
| 299 | |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 300 | #define SWEVENT_HLIST_BITS 8 |
| 301 | #define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS) |
Frederic Weisbecker | 76e1d90 | 2010-04-05 15:35:57 +0200 | [diff] [blame] | 302 | |
| 303 | struct swevent_hlist { |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 304 | struct hlist_head heads[SWEVENT_HLIST_SIZE]; |
| 305 | struct rcu_head rcu_head; |
Frederic Weisbecker | 76e1d90 | 2010-04-05 15:35:57 +0200 | [diff] [blame] | 306 | }; |
| 307 | |
Peter Zijlstra | 8a49542 | 2010-05-27 15:47:49 +0200 | [diff] [blame] | 308 | #define PERF_ATTACH_CONTEXT 0x01 |
| 309 | #define PERF_ATTACH_GROUP 0x02 |
Peter Zijlstra | d580ff8 | 2010-10-14 17:43:23 +0200 | [diff] [blame] | 310 | #define PERF_ATTACH_TASK 0x04 |
Peter Zijlstra | 8a49542 | 2010-05-27 15:47:49 +0200 | [diff] [blame] | 311 | |
Li Zefan | 877c685 | 2013-03-05 11:38:08 +0800 | [diff] [blame] | 312 | struct perf_cgroup; |
Frederic Weisbecker | 7636913 | 2011-05-19 19:55:04 +0200 | [diff] [blame] | 313 | struct ring_buffer; |
| 314 | |
Ingo Molnar | 6a93070 | 2008-12-11 15:17:03 +0100 | [diff] [blame] | 315 | /** |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 316 | * struct perf_event - performance event kernel representation: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 317 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 318 | struct perf_event { |
| 319 | #ifdef CONFIG_PERF_EVENTS |
Ingo Molnar | 65abc86 | 2009-09-21 10:18:27 +0200 | [diff] [blame] | 320 | struct list_head group_entry; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 321 | struct list_head event_entry; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 322 | struct list_head sibling_list; |
Frederic Weisbecker | 76e1d90 | 2010-04-05 15:35:57 +0200 | [diff] [blame] | 323 | struct hlist_node hlist_entry; |
Ingo Molnar | 0127c3e | 2009-05-25 22:03:26 +0200 | [diff] [blame] | 324 | int nr_siblings; |
Frederic Weisbecker | d6f962b | 2010-01-10 01:25:51 +0100 | [diff] [blame] | 325 | int group_flags; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 326 | struct perf_event *group_leader; |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 327 | struct pmu *pmu; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 328 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 329 | enum perf_event_active_state state; |
Peter Zijlstra | 8a49542 | 2010-05-27 15:47:49 +0200 | [diff] [blame] | 330 | unsigned int attach_state; |
Peter Zijlstra | e785059 | 2010-05-21 14:43:08 +0200 | [diff] [blame] | 331 | local64_t count; |
Peter Zijlstra | a6e6dea | 2010-05-21 14:27:58 +0200 | [diff] [blame] | 332 | atomic64_t child_count; |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 333 | |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 334 | /* |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 335 | * These are the total time in nanoseconds that the event |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 336 | * has been enabled (i.e. eligible to run, and the task has |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 337 | * been scheduled in, if this is a per-task event) |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 338 | * and running (scheduled onto the CPU), respectively. |
| 339 | * |
| 340 | * They are computed from tstamp_enabled, tstamp_running and |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 341 | * tstamp_stopped when the event is in INACTIVE or ACTIVE state. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 342 | */ |
| 343 | u64 total_time_enabled; |
| 344 | u64 total_time_running; |
| 345 | |
| 346 | /* |
| 347 | * These are timestamps used for computing total_time_enabled |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 348 | * and total_time_running when the event is in INACTIVE or |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 349 | * ACTIVE state, measured in nanoseconds from an arbitrary point |
| 350 | * in time. |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 351 | * tstamp_enabled: the notional time when the event was enabled |
| 352 | * tstamp_running: the notional time when the event was scheduled on |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 353 | * tstamp_stopped: in INACTIVE state, the notional time when the |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 354 | * event was scheduled off. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 355 | */ |
| 356 | u64 tstamp_enabled; |
| 357 | u64 tstamp_running; |
| 358 | u64 tstamp_stopped; |
| 359 | |
Stephane Eranian | eed0152 | 2010-10-26 16:08:01 +0200 | [diff] [blame] | 360 | /* |
| 361 | * timestamp shadows the actual context timing but it can |
| 362 | * be safely used in NMI interrupt context. It reflects the |
| 363 | * context time as it was when the event was last scheduled in. |
| 364 | * |
| 365 | * ctx_time already accounts for ctx->timestamp. Therefore to |
| 366 | * compute ctx_time for a sample, simply add perf_clock(). |
| 367 | */ |
| 368 | u64 shadow_ctx_time; |
| 369 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 370 | struct perf_event_attr attr; |
Arnaldo Carvalho de Melo | c320c7b | 2010-10-20 12:50:11 -0200 | [diff] [blame] | 371 | u16 header_size; |
Arnaldo Carvalho de Melo | 6844c09 | 2010-12-03 16:36:35 -0200 | [diff] [blame] | 372 | u16 id_header_size; |
Arnaldo Carvalho de Melo | c320c7b | 2010-10-20 12:50:11 -0200 | [diff] [blame] | 373 | u16 read_size; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 374 | struct hw_perf_event hw; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 375 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 376 | struct perf_event_context *ctx; |
Al Viro | a6fa941 | 2012-08-20 14:59:25 +0100 | [diff] [blame] | 377 | atomic_long_t refcount; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 378 | |
| 379 | /* |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 380 | * These accumulate total time (in nanoseconds) that children |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 381 | * events have been enabled and running, respectively. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 382 | */ |
| 383 | atomic64_t child_total_time_enabled; |
| 384 | atomic64_t child_total_time_running; |
| 385 | |
| 386 | /* |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 387 | * Protect attach/detach and child_list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 388 | */ |
Peter Zijlstra | fccc714 | 2009-05-23 18:28:56 +0200 | [diff] [blame] | 389 | struct mutex child_mutex; |
| 390 | struct list_head child_list; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 391 | struct perf_event *parent; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 392 | |
| 393 | int oncpu; |
| 394 | int cpu; |
| 395 | |
Peter Zijlstra | 082ff5a | 2009-05-23 18:29:00 +0200 | [diff] [blame] | 396 | struct list_head owner_entry; |
| 397 | struct task_struct *owner; |
| 398 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 399 | /* mmap bits */ |
| 400 | struct mutex mmap_mutex; |
| 401 | atomic_t mmap_count; |
Peter Zijlstra | 26cb63a | 2013-05-28 10:55:48 +0200 | [diff] [blame] | 402 | |
Frederic Weisbecker | 7636913 | 2011-05-19 19:55:04 +0200 | [diff] [blame] | 403 | struct ring_buffer *rb; |
Peter Zijlstra | 10c6db1 | 2011-11-26 02:47:31 +0100 | [diff] [blame] | 404 | struct list_head rb_entry; |
Paul Mackerras | 37d8182 | 2009-03-23 18:22:08 +0100 | [diff] [blame] | 405 | |
Peter Zijlstra | 7b732a7 | 2009-03-23 18:22:10 +0100 | [diff] [blame] | 406 | /* poll related */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 407 | wait_queue_head_t waitq; |
Peter Zijlstra | 3c446b3d | 2009-04-06 11:45:01 +0200 | [diff] [blame] | 408 | struct fasync_struct *fasync; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 409 | |
| 410 | /* delayed work for NMIs and such */ |
| 411 | int pending_wakeup; |
Peter Zijlstra | 4c9e254 | 2009-04-06 11:45:09 +0200 | [diff] [blame] | 412 | int pending_kill; |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 413 | int pending_disable; |
Peter Zijlstra | e360adb | 2010-10-14 14:01:34 +0800 | [diff] [blame] | 414 | struct irq_work pending; |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 415 | |
Peter Zijlstra | 79f1464 | 2009-04-06 11:45:07 +0200 | [diff] [blame] | 416 | atomic_t event_limit; |
| 417 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 418 | void (*destroy)(struct perf_event *); |
Peter Zijlstra | 592903c | 2009-03-13 12:21:36 +0100 | [diff] [blame] | 419 | struct rcu_head rcu_head; |
Peter Zijlstra | 709e50c | 2009-06-02 14:13:15 +0200 | [diff] [blame] | 420 | |
| 421 | struct pid_namespace *ns; |
Peter Zijlstra | 8e5799b | 2009-06-02 15:08:15 +0200 | [diff] [blame] | 422 | u64 id; |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 423 | |
Frederic Weisbecker | b326e95 | 2009-12-05 09:44:31 +0100 | [diff] [blame] | 424 | perf_overflow_handler_t overflow_handler; |
Avi Kivity | 4dc0da8 | 2011-06-29 18:42:35 +0300 | [diff] [blame] | 425 | void *overflow_handler_context; |
Peter Zijlstra | 453f19e | 2009-11-20 22:19:43 +0100 | [diff] [blame] | 426 | |
Li Zefan | 07b139c | 2009-12-21 14:27:35 +0800 | [diff] [blame] | 427 | #ifdef CONFIG_EVENT_TRACING |
Peter Zijlstra | 1c024eca | 2010-05-19 14:02:22 +0200 | [diff] [blame] | 428 | struct ftrace_event_call *tp_event; |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 429 | struct event_filter *filter; |
Jiri Olsa | ced3900 | 2012-02-15 15:51:52 +0100 | [diff] [blame] | 430 | #ifdef CONFIG_FUNCTION_TRACER |
| 431 | struct ftrace_ops ftrace_ops; |
| 432 | #endif |
Ingo Molnar | ee06094 | 2008-12-13 09:00:03 +0100 | [diff] [blame] | 433 | #endif |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 434 | |
Stephane Eranian | e5d1367 | 2011-02-14 11:20:01 +0200 | [diff] [blame] | 435 | #ifdef CONFIG_CGROUP_PERF |
| 436 | struct perf_cgroup *cgrp; /* cgroup event is attach to */ |
| 437 | int cgrp_defer_enabled; |
| 438 | #endif |
| 439 | |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 440 | #endif /* CONFIG_PERF_EVENTS */ |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 441 | }; |
| 442 | |
Peter Zijlstra | b04243e | 2010-09-17 11:28:48 +0200 | [diff] [blame] | 443 | enum perf_event_context_type { |
| 444 | task_context, |
| 445 | cpu_context, |
| 446 | }; |
| 447 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 448 | /** |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 449 | * struct perf_event_context - event context structure |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 450 | * |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 451 | * Used as a container for task events and CPU events as well: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 452 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 453 | struct perf_event_context { |
Peter Zijlstra | 108b02c | 2010-09-06 14:32:03 +0200 | [diff] [blame] | 454 | struct pmu *pmu; |
Richard Kennedy | ee643c4 | 2011-03-07 15:46:59 +0000 | [diff] [blame] | 455 | enum perf_event_context_type type; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 456 | /* |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 457 | * Protect the states of the events in the list, |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 458 | * nr_active, and the list: |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 459 | */ |
Thomas Gleixner | e625cce1 | 2009-11-17 18:02:06 +0100 | [diff] [blame] | 460 | raw_spinlock_t lock; |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 461 | /* |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 462 | * Protect the list of events. Locking either mutex or lock |
Paul Mackerras | d859e29 | 2009-01-17 18:10:22 +1100 | [diff] [blame] | 463 | * is sufficient to ensure the list doesn't change; to change |
| 464 | * the list you need to lock both the mutex and the spinlock. |
| 465 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 466 | struct mutex mutex; |
Ingo Molnar | 04289bb | 2008-12-11 08:38:42 +0100 | [diff] [blame] | 467 | |
Frederic Weisbecker | 889ff01 | 2010-01-09 20:04:47 +0100 | [diff] [blame] | 468 | struct list_head pinned_groups; |
| 469 | struct list_head flexible_groups; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 470 | struct list_head event_list; |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 471 | int nr_events; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 472 | int nr_active; |
| 473 | int is_active; |
Peter Zijlstra | bfbd338 | 2009-06-24 21:11:59 +0200 | [diff] [blame] | 474 | int nr_stat; |
Peter Zijlstra | 0f5a260 | 2011-11-16 14:38:16 +0100 | [diff] [blame] | 475 | int nr_freq; |
Thomas Gleixner | dddd337 | 2010-11-24 10:05:55 +0100 | [diff] [blame] | 476 | int rotate_disable; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 477 | atomic_t refcount; |
| 478 | struct task_struct *task; |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 479 | |
| 480 | /* |
Peter Zijlstra | 4af4998 | 2009-04-06 11:45:10 +0200 | [diff] [blame] | 481 | * Context clock, runs when context enabled. |
Paul Mackerras | 53cfbf5 | 2009-03-25 22:46:58 +1100 | [diff] [blame] | 482 | */ |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 483 | u64 time; |
| 484 | u64 timestamp; |
Paul Mackerras | 564c2b2 | 2009-05-22 14:27:22 +1000 | [diff] [blame] | 485 | |
| 486 | /* |
| 487 | * These fields let us detect when two contexts have both |
| 488 | * been cloned (inherited) from a common ancestor. |
| 489 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 490 | struct perf_event_context *parent_ctx; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 491 | u64 parent_gen; |
| 492 | u64 generation; |
| 493 | int pin_count; |
Stephane Eranian | d010b33 | 2012-02-09 23:21:00 +0100 | [diff] [blame] | 494 | int nr_cgroups; /* cgroup evts */ |
| 495 | int nr_branch_stack; /* branch_stack evt */ |
Richard Kennedy | 28009ce | 2011-06-07 16:33:38 +0100 | [diff] [blame] | 496 | struct rcu_head rcu_head; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 497 | }; |
| 498 | |
Frederic Weisbecker | 7ae07ea | 2010-08-14 20:45:13 +0200 | [diff] [blame] | 499 | /* |
| 500 | * Number of contexts where an event can trigger: |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 501 | * task, softirq, hardirq, nmi. |
Frederic Weisbecker | 7ae07ea | 2010-08-14 20:45:13 +0200 | [diff] [blame] | 502 | */ |
| 503 | #define PERF_NR_CONTEXTS 4 |
| 504 | |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 505 | /** |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 506 | * struct perf_event_cpu_context - per cpu event context structure |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 507 | */ |
| 508 | struct perf_cpu_context { |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 509 | struct perf_event_context ctx; |
| 510 | struct perf_event_context *task_ctx; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 511 | int active_oncpu; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 512 | int exclusive; |
Stephane Eranian | 9e63020 | 2013-04-03 14:21:33 +0200 | [diff] [blame] | 513 | struct hrtimer hrtimer; |
| 514 | ktime_t hrtimer_interval; |
Peter Zijlstra | e9d2b06 | 2010-09-17 11:28:50 +0200 | [diff] [blame] | 515 | struct list_head rotation_list; |
Peter Zijlstra | 3f1f332 | 2012-10-02 15:38:52 +0200 | [diff] [blame] | 516 | struct pmu *unique_pmu; |
Stephane Eranian | e5d1367 | 2011-02-14 11:20:01 +0200 | [diff] [blame] | 517 | struct perf_cgroup *cgrp; |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 518 | }; |
| 519 | |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 520 | struct perf_output_handle { |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 521 | struct perf_event *event; |
Frederic Weisbecker | 7636913 | 2011-05-19 19:55:04 +0200 | [diff] [blame] | 522 | struct ring_buffer *rb; |
Peter Zijlstra | 6d1acfd | 2010-05-18 11:12:48 +0200 | [diff] [blame] | 523 | unsigned long wakeup; |
Peter Zijlstra | 5d967a8 | 2010-05-20 16:46:39 +0200 | [diff] [blame] | 524 | unsigned long size; |
| 525 | void *addr; |
| 526 | int page; |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 527 | }; |
| 528 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 529 | #ifdef CONFIG_PERF_EVENTS |
Robert Richter | 829b42d | 2009-04-29 12:46:59 +0200 | [diff] [blame] | 530 | |
Mischa Jonker | 03d8e80 | 2013-06-04 11:45:48 +0200 | [diff] [blame] | 531 | extern int perf_pmu_register(struct pmu *pmu, const char *name, int type); |
Peter Zijlstra | b0a873e | 2010-06-11 13:35:08 +0200 | [diff] [blame] | 532 | extern void perf_pmu_unregister(struct pmu *pmu); |
Ingo Molnar | 621a01e | 2008-12-11 12:46:46 +0100 | [diff] [blame] | 533 | |
Matt Fleming | 3bf101b | 2010-09-27 20:22:24 +0100 | [diff] [blame] | 534 | extern int perf_num_counters(void); |
Matt Fleming | 84c7991 | 2010-10-03 21:41:13 +0100 | [diff] [blame] | 535 | extern const char *perf_pmu_name(void); |
Jiri Olsa | ab0cce5 | 2012-05-23 13:13:02 +0200 | [diff] [blame] | 536 | extern void __perf_event_task_sched_in(struct task_struct *prev, |
| 537 | struct task_struct *task); |
| 538 | extern void __perf_event_task_sched_out(struct task_struct *prev, |
| 539 | struct task_struct *next); |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 540 | extern int perf_event_init_task(struct task_struct *child); |
| 541 | extern void perf_event_exit_task(struct task_struct *child); |
| 542 | extern void perf_event_free_task(struct task_struct *task); |
Peter Zijlstra | 4e231c7 | 2010-09-09 21:01:59 +0200 | [diff] [blame] | 543 | extern void perf_event_delayed_put(struct task_struct *task); |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 544 | extern void perf_event_print_debug(void); |
Peter Zijlstra | 33696fc | 2010-06-14 08:49:00 +0200 | [diff] [blame] | 545 | extern void perf_pmu_disable(struct pmu *pmu); |
| 546 | extern void perf_pmu_enable(struct pmu *pmu); |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 547 | extern int perf_event_task_disable(void); |
| 548 | extern int perf_event_task_enable(void); |
Avi Kivity | 26ca5c1 | 2011-06-29 18:42:37 +0300 | [diff] [blame] | 549 | extern int perf_event_refresh(struct perf_event *event, int refresh); |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 550 | extern void perf_event_update_userpage(struct perf_event *event); |
Arjan van de Ven | fb0459d | 2009-09-25 12:25:56 +0200 | [diff] [blame] | 551 | extern int perf_event_release_kernel(struct perf_event *event); |
| 552 | extern struct perf_event * |
| 553 | perf_event_create_kernel_counter(struct perf_event_attr *attr, |
| 554 | int cpu, |
Matt Helsley | 38a81da | 2010-09-13 13:01:20 -0700 | [diff] [blame] | 555 | struct task_struct *task, |
Avi Kivity | 4dc0da8 | 2011-06-29 18:42:35 +0300 | [diff] [blame] | 556 | perf_overflow_handler_t callback, |
| 557 | void *context); |
Yan, Zheng | 0cda4c0 | 2012-06-15 14:31:33 +0800 | [diff] [blame] | 558 | extern void perf_pmu_migrate_context(struct pmu *pmu, |
| 559 | int src_cpu, int dst_cpu); |
Peter Zijlstra | 59ed446 | 2009-11-20 22:19:55 +0100 | [diff] [blame] | 560 | extern u64 perf_event_read_value(struct perf_event *event, |
| 561 | u64 *enabled, u64 *running); |
Ingo Molnar | 5c92d12 | 2008-12-11 13:21:10 +0100 | [diff] [blame] | 562 | |
Stephane Eranian | d010b33 | 2012-02-09 23:21:00 +0100 | [diff] [blame] | 563 | |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 564 | struct perf_sample_data { |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 565 | u64 type; |
| 566 | |
| 567 | u64 ip; |
| 568 | struct { |
| 569 | u32 pid; |
| 570 | u32 tid; |
| 571 | } tid_entry; |
| 572 | u64 time; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 573 | u64 addr; |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 574 | u64 id; |
| 575 | u64 stream_id; |
| 576 | struct { |
| 577 | u32 cpu; |
| 578 | u32 reserved; |
| 579 | } cpu_entry; |
Ingo Molnar | a308444 | 2009-06-11 14:44:26 +0200 | [diff] [blame] | 580 | u64 period; |
Stephane Eranian | d6be9ad | 2013-01-24 16:10:31 +0100 | [diff] [blame] | 581 | union perf_mem_data_src data_src; |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 582 | struct perf_callchain_entry *callchain; |
Frederic Weisbecker | 3a43ce6 | 2009-08-08 04:26:37 +0200 | [diff] [blame] | 583 | struct perf_raw_record *raw; |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 584 | struct perf_branch_stack *br_stack; |
Jiri Olsa | 4018994 | 2012-08-07 15:20:37 +0200 | [diff] [blame] | 585 | struct perf_regs_user regs_user; |
Jiri Olsa | c5ebced | 2012-08-07 15:20:40 +0200 | [diff] [blame] | 586 | u64 stack_user_size; |
Andi Kleen | c3feedf | 2013-01-24 16:10:28 +0100 | [diff] [blame] | 587 | u64 weight; |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 588 | }; |
| 589 | |
Robert Richter | fd0d000 | 2012-04-02 20:19:08 +0200 | [diff] [blame] | 590 | static inline void perf_sample_data_init(struct perf_sample_data *data, |
| 591 | u64 addr, u64 period) |
Peter Zijlstra | dc1d628 | 2010-03-03 15:55:04 +0100 | [diff] [blame] | 592 | { |
Robert Richter | fd0d000 | 2012-04-02 20:19:08 +0200 | [diff] [blame] | 593 | /* remaining struct members initialized in perf_prepare_sample() */ |
Peter Zijlstra | dc1d628 | 2010-03-03 15:55:04 +0100 | [diff] [blame] | 594 | data->addr = addr; |
| 595 | data->raw = NULL; |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 596 | data->br_stack = NULL; |
Jiri Olsa | 4018994 | 2012-08-07 15:20:37 +0200 | [diff] [blame] | 597 | data->period = period; |
| 598 | data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE; |
| 599 | data->regs_user.regs = NULL; |
Jiri Olsa | c5ebced | 2012-08-07 15:20:40 +0200 | [diff] [blame] | 600 | data->stack_user_size = 0; |
Andi Kleen | c3feedf | 2013-01-24 16:10:28 +0100 | [diff] [blame] | 601 | data->weight = 0; |
Stephane Eranian | d6be9ad | 2013-01-24 16:10:31 +0100 | [diff] [blame] | 602 | data->data_src.val = 0; |
Peter Zijlstra | dc1d628 | 2010-03-03 15:55:04 +0100 | [diff] [blame] | 603 | } |
| 604 | |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 605 | extern void perf_output_sample(struct perf_output_handle *handle, |
| 606 | struct perf_event_header *header, |
| 607 | struct perf_sample_data *data, |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 608 | struct perf_event *event); |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 609 | extern void perf_prepare_sample(struct perf_event_header *header, |
| 610 | struct perf_sample_data *data, |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 611 | struct perf_event *event, |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 612 | struct pt_regs *regs); |
| 613 | |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 614 | extern int perf_event_overflow(struct perf_event *event, |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 615 | struct perf_sample_data *data, |
| 616 | struct pt_regs *regs); |
Peter Zijlstra | df1a132 | 2009-06-10 21:02:22 +0200 | [diff] [blame] | 617 | |
Franck Bui-Huu | 6c7e550 | 2010-11-23 16:21:43 +0100 | [diff] [blame] | 618 | static inline bool is_sampling_event(struct perf_event *event) |
| 619 | { |
| 620 | return event->attr.sample_period != 0; |
| 621 | } |
| 622 | |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 623 | /* |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 624 | * Return 1 for a software event, 0 for a hardware event |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 625 | */ |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 626 | static inline int is_software_event(struct perf_event *event) |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 627 | { |
Peter Zijlstra | 89a1e18 | 2010-09-07 17:34:50 +0200 | [diff] [blame] | 628 | return event->pmu->task_ctx_nr == perf_sw_context; |
Paul Mackerras | 3b6f9e5 | 2009-01-14 21:00:30 +1100 | [diff] [blame] | 629 | } |
| 630 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 631 | extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX]; |
Peter Zijlstra | f29ac75 | 2009-06-19 18:27:26 +0200 | [diff] [blame] | 632 | |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 633 | extern void __perf_sw_event(u32, u64, struct pt_regs *, u64); |
Peter Zijlstra | f29ac75 | 2009-06-19 18:27:26 +0200 | [diff] [blame] | 634 | |
Frederic Weisbecker | b0f82b8 | 2010-05-20 07:47:21 +0200 | [diff] [blame] | 635 | #ifndef perf_arch_fetch_caller_regs |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 636 | static inline void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip) { } |
Frederic Weisbecker | b0f82b8 | 2010-05-20 07:47:21 +0200 | [diff] [blame] | 637 | #endif |
Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame] | 638 | |
| 639 | /* |
| 640 | * Take a snapshot of the regs. Skip ip and frame pointer to |
| 641 | * the nth caller. We only need a few of the regs: |
| 642 | * - ip for PERF_SAMPLE_IP |
| 643 | * - cs for user_mode() tests |
| 644 | * - bp for callchains |
| 645 | * - eflags, for future purposes, just in case |
| 646 | */ |
Frederic Weisbecker | b0f82b8 | 2010-05-20 07:47:21 +0200 | [diff] [blame] | 647 | static inline void perf_fetch_caller_regs(struct pt_regs *regs) |
Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame] | 648 | { |
Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame] | 649 | memset(regs, 0, sizeof(*regs)); |
| 650 | |
Frederic Weisbecker | b0f82b8 | 2010-05-20 07:47:21 +0200 | [diff] [blame] | 651 | perf_arch_fetch_caller_regs(regs, CALLER_ADDR0); |
Frederic Weisbecker | 5331d7b | 2010-03-04 21:15:56 +0100 | [diff] [blame] | 652 | } |
| 653 | |
Peter Zijlstra | 7e54a5a | 2010-10-14 22:32:45 +0200 | [diff] [blame] | 654 | static __always_inline void |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 655 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) |
Frederic Weisbecker | e49a5bd | 2010-03-22 19:40:03 +0100 | [diff] [blame] | 656 | { |
Peter Zijlstra | 7e54a5a | 2010-10-14 22:32:45 +0200 | [diff] [blame] | 657 | struct pt_regs hot_regs; |
Frederic Weisbecker | e49a5bd | 2010-03-22 19:40:03 +0100 | [diff] [blame] | 658 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 659 | if (static_key_false(&perf_swevent_enabled[event_id])) { |
Jason Baron | d430d3d | 2011-03-16 17:29:47 -0400 | [diff] [blame] | 660 | if (!regs) { |
| 661 | perf_fetch_caller_regs(&hot_regs); |
| 662 | regs = &hot_regs; |
| 663 | } |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 664 | __perf_sw_event(event_id, nr, regs, addr); |
Frederic Weisbecker | e49a5bd | 2010-03-22 19:40:03 +0100 | [diff] [blame] | 665 | } |
| 666 | } |
| 667 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 668 | extern struct static_key_deferred perf_sched_events; |
Peter Zijlstra | ee6dcfa | 2010-11-26 13:49:04 +0100 | [diff] [blame] | 669 | |
Jiri Olsa | ab0cce5 | 2012-05-23 13:13:02 +0200 | [diff] [blame] | 670 | static inline void perf_event_task_sched_in(struct task_struct *prev, |
Stephane Eranian | a8d757e | 2011-08-25 15:58:03 +0200 | [diff] [blame] | 671 | struct task_struct *task) |
Peter Zijlstra | ee6dcfa | 2010-11-26 13:49:04 +0100 | [diff] [blame] | 672 | { |
Jiri Olsa | ab0cce5 | 2012-05-23 13:13:02 +0200 | [diff] [blame] | 673 | if (static_key_false(&perf_sched_events.key)) |
| 674 | __perf_event_task_sched_in(prev, task); |
| 675 | } |
| 676 | |
| 677 | static inline void perf_event_task_sched_out(struct task_struct *prev, |
| 678 | struct task_struct *next) |
| 679 | { |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 680 | perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0); |
Peter Zijlstra | ee6dcfa | 2010-11-26 13:49:04 +0100 | [diff] [blame] | 681 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 682 | if (static_key_false(&perf_sched_events.key)) |
Jiri Olsa | ab0cce5 | 2012-05-23 13:13:02 +0200 | [diff] [blame] | 683 | __perf_event_task_sched_out(prev, next); |
Peter Zijlstra | ee6dcfa | 2010-11-26 13:49:04 +0100 | [diff] [blame] | 684 | } |
| 685 | |
Eric B Munson | 3af9e85 | 2010-05-18 15:30:49 +0100 | [diff] [blame] | 686 | extern void perf_event_mmap(struct vm_area_struct *vma); |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 687 | extern struct perf_guest_info_callbacks *perf_guest_cbs; |
Zhang, Yanmin | dcf46b9 | 2010-04-20 10:13:58 +0800 | [diff] [blame] | 688 | extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
| 689 | extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks); |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 690 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 691 | extern void perf_event_comm(struct task_struct *tsk); |
| 692 | extern void perf_event_fork(struct task_struct *tsk); |
Peter Zijlstra | 8d1b2d9 | 2009-04-08 15:01:30 +0200 | [diff] [blame] | 693 | |
Frederic Weisbecker | 56962b4 | 2010-06-30 23:03:51 +0200 | [diff] [blame] | 694 | /* Callchains */ |
| 695 | DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); |
| 696 | |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 697 | extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); |
| 698 | extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); |
Frederic Weisbecker | 56962b4 | 2010-06-30 23:03:51 +0200 | [diff] [blame] | 699 | |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 700 | static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |
Frederic Weisbecker | 70791ce | 2010-06-29 19:34:05 +0200 | [diff] [blame] | 701 | { |
| 702 | if (entry->nr < PERF_MAX_STACK_DEPTH) |
| 703 | entry->ip[entry->nr++] = ip; |
| 704 | } |
Peter Zijlstra | 394ee07 | 2009-03-30 19:07:14 +0200 | [diff] [blame] | 705 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 706 | extern int sysctl_perf_event_paranoid; |
| 707 | extern int sysctl_perf_event_mlock; |
| 708 | extern int sysctl_perf_event_sample_rate; |
Dave Hansen | 14c63f1 | 2013-06-21 08:51:36 -0700 | [diff] [blame] | 709 | extern int sysctl_perf_cpu_time_max_percent; |
| 710 | |
| 711 | extern void perf_sample_event_took(u64 sample_len_ns); |
Peter Zijlstra | 1ccd154 | 2009-04-09 10:53:45 +0200 | [diff] [blame] | 712 | |
Peter Zijlstra | 163ec43 | 2011-02-16 11:22:34 +0100 | [diff] [blame] | 713 | extern int perf_proc_update_handler(struct ctl_table *table, int write, |
| 714 | void __user *buffer, size_t *lenp, |
| 715 | loff_t *ppos); |
Dave Hansen | 14c63f1 | 2013-06-21 08:51:36 -0700 | [diff] [blame] | 716 | extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write, |
| 717 | void __user *buffer, size_t *lenp, |
| 718 | loff_t *ppos); |
| 719 | |
Peter Zijlstra | 163ec43 | 2011-02-16 11:22:34 +0100 | [diff] [blame] | 720 | |
Peter Zijlstra | 320ebf0 | 2010-03-02 12:35:37 +0100 | [diff] [blame] | 721 | static inline bool perf_paranoid_tracepoint_raw(void) |
| 722 | { |
| 723 | return sysctl_perf_event_paranoid > -1; |
| 724 | } |
| 725 | |
| 726 | static inline bool perf_paranoid_cpu(void) |
| 727 | { |
| 728 | return sysctl_perf_event_paranoid > 0; |
| 729 | } |
| 730 | |
| 731 | static inline bool perf_paranoid_kernel(void) |
| 732 | { |
| 733 | return sysctl_perf_event_paranoid > 1; |
| 734 | } |
| 735 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 736 | extern void perf_event_init(void); |
Peter Zijlstra | 1c024eca | 2010-05-19 14:02:22 +0200 | [diff] [blame] | 737 | extern void perf_tp_event(u64 addr, u64 count, void *record, |
| 738 | int entry_size, struct pt_regs *regs, |
Andrew Vagin | e6dab5f | 2012-07-11 18:14:58 +0400 | [diff] [blame] | 739 | struct hlist_head *head, int rctx, |
| 740 | struct task_struct *task); |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 741 | extern void perf_bp_event(struct perf_event *event, void *data); |
Ingo Molnar | 0d905bc | 2009-05-04 19:13:30 +0200 | [diff] [blame] | 742 | |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 743 | #ifndef perf_misc_flags |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 744 | # define perf_misc_flags(regs) \ |
| 745 | (user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL) |
| 746 | # define perf_instruction_pointer(regs) instruction_pointer(regs) |
Paul Mackerras | 9d23a90 | 2009-05-14 21:48:08 +1000 | [diff] [blame] | 747 | #endif |
| 748 | |
Stephane Eranian | bce38cd | 2012-02-09 23:20:51 +0100 | [diff] [blame] | 749 | static inline bool has_branch_stack(struct perf_event *event) |
| 750 | { |
| 751 | return event->attr.sample_type & PERF_SAMPLE_BRANCH_STACK; |
| 752 | } |
| 753 | |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 754 | extern int perf_output_begin(struct perf_output_handle *handle, |
Peter Zijlstra | a7ac67e | 2011-06-27 16:47:16 +0200 | [diff] [blame] | 755 | struct perf_event *event, unsigned int size); |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 756 | extern void perf_output_end(struct perf_output_handle *handle); |
Frederic Weisbecker | 91d7753 | 2012-08-07 15:20:38 +0200 | [diff] [blame] | 757 | extern unsigned int perf_output_copy(struct perf_output_handle *handle, |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 758 | const void *buf, unsigned int len); |
Jiri Olsa | 5685e0f | 2012-08-07 15:20:39 +0200 | [diff] [blame] | 759 | extern unsigned int perf_output_skip(struct perf_output_handle *handle, |
| 760 | unsigned int len); |
Peter Zijlstra | 4ed7c92 | 2009-11-23 11:37:29 +0100 | [diff] [blame] | 761 | extern int perf_swevent_get_recursion_context(void); |
| 762 | extern void perf_swevent_put_recursion_context(int rctx); |
Jiri Olsa | ab57384 | 2013-05-01 17:25:44 +0200 | [diff] [blame] | 763 | extern u64 perf_swevent_set_period(struct perf_event *event); |
Frederic Weisbecker | 44234ad | 2009-12-09 09:25:48 +0100 | [diff] [blame] | 764 | extern void perf_event_enable(struct perf_event *event); |
| 765 | extern void perf_event_disable(struct perf_event *event); |
K.Prasad | 500ad2d | 2012-08-02 13:46:35 +0530 | [diff] [blame] | 766 | extern int __perf_event_disable(void *info); |
Peter Zijlstra | e9d2b06 | 2010-09-17 11:28:50 +0200 | [diff] [blame] | 767 | extern void perf_event_task_tick(void); |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 768 | #else |
| 769 | static inline void |
Jiri Olsa | ab0cce5 | 2012-05-23 13:13:02 +0200 | [diff] [blame] | 770 | perf_event_task_sched_in(struct task_struct *prev, |
| 771 | struct task_struct *task) { } |
| 772 | static inline void |
| 773 | perf_event_task_sched_out(struct task_struct *prev, |
| 774 | struct task_struct *next) { } |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 775 | static inline int perf_event_init_task(struct task_struct *child) { return 0; } |
| 776 | static inline void perf_event_exit_task(struct task_struct *child) { } |
| 777 | static inline void perf_event_free_task(struct task_struct *task) { } |
Peter Zijlstra | 4e231c7 | 2010-09-09 21:01:59 +0200 | [diff] [blame] | 778 | static inline void perf_event_delayed_put(struct task_struct *task) { } |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 779 | static inline void perf_event_print_debug(void) { } |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 780 | static inline int perf_event_task_disable(void) { return -EINVAL; } |
| 781 | static inline int perf_event_task_enable(void) { return -EINVAL; } |
Avi Kivity | 26ca5c1 | 2011-06-29 18:42:37 +0300 | [diff] [blame] | 782 | static inline int perf_event_refresh(struct perf_event *event, int refresh) |
| 783 | { |
| 784 | return -EINVAL; |
| 785 | } |
Peter Zijlstra | 15dbf27 | 2009-03-13 12:21:32 +0100 | [diff] [blame] | 786 | |
Peter Zijlstra | 925d519 | 2009-03-30 19:07:02 +0200 | [diff] [blame] | 787 | static inline void |
Peter Zijlstra | a8b0ca1 | 2011-06-27 14:41:57 +0200 | [diff] [blame] | 788 | perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr) { } |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 789 | static inline void |
Ingo Molnar | 184f412 | 2010-01-27 08:39:39 +0100 | [diff] [blame] | 790 | perf_bp_event(struct perf_event *event, void *data) { } |
Peter Zijlstra | 0a4a939 | 2009-03-30 19:07:05 +0200 | [diff] [blame] | 791 | |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 792 | static inline int perf_register_guest_info_callbacks |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 793 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 794 | static inline int perf_unregister_guest_info_callbacks |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 795 | (struct perf_guest_info_callbacks *callbacks) { return 0; } |
Zhang, Yanmin | 39447b3 | 2010-04-19 13:32:41 +0800 | [diff] [blame] | 796 | |
Ingo Molnar | 57c0c15 | 2009-09-21 12:20:38 +0200 | [diff] [blame] | 797 | static inline void perf_event_mmap(struct vm_area_struct *vma) { } |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 798 | static inline void perf_event_comm(struct task_struct *tsk) { } |
| 799 | static inline void perf_event_fork(struct task_struct *tsk) { } |
| 800 | static inline void perf_event_init(void) { } |
Ingo Molnar | 184f412 | 2010-01-27 08:39:39 +0100 | [diff] [blame] | 801 | static inline int perf_swevent_get_recursion_context(void) { return -1; } |
Peter Zijlstra | 4ed7c92 | 2009-11-23 11:37:29 +0100 | [diff] [blame] | 802 | static inline void perf_swevent_put_recursion_context(int rctx) { } |
Jiri Olsa | ab57384 | 2013-05-01 17:25:44 +0200 | [diff] [blame] | 803 | static inline u64 perf_swevent_set_period(struct perf_event *event) { return 0; } |
Frederic Weisbecker | 44234ad | 2009-12-09 09:25:48 +0100 | [diff] [blame] | 804 | static inline void perf_event_enable(struct perf_event *event) { } |
| 805 | static inline void perf_event_disable(struct perf_event *event) { } |
K.Prasad | 500ad2d | 2012-08-02 13:46:35 +0530 | [diff] [blame] | 806 | static inline int __perf_event_disable(void *info) { return -1; } |
Peter Zijlstra | e9d2b06 | 2010-09-17 11:28:50 +0200 | [diff] [blame] | 807 | static inline void perf_event_task_tick(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 808 | #endif |
| 809 | |
Frederic Weisbecker | 026249e | 2013-04-20 15:58:34 +0200 | [diff] [blame] | 810 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_NO_HZ_FULL) |
| 811 | extern bool perf_event_can_stop_tick(void); |
| 812 | #else |
| 813 | static inline bool perf_event_can_stop_tick(void) { return true; } |
| 814 | #endif |
| 815 | |
David Rientjes | 6c4d3bc | 2013-03-17 15:49:10 -0700 | [diff] [blame] | 816 | #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) |
| 817 | extern void perf_restore_debug_store(void); |
| 818 | #else |
Stephane Eranian | 1d9d863 | 2013-03-15 14:26:07 +0100 | [diff] [blame] | 819 | static inline void perf_restore_debug_store(void) { } |
Thomas Gleixner | 0793a61 | 2008-12-04 20:12:29 +0100 | [diff] [blame] | 820 | #endif |
| 821 | |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 822 | #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x)) |
Markus Metzger | 5622f29 | 2009-09-15 13:00:23 +0200 | [diff] [blame] | 823 | |
Peter Zijlstra | 3f6da39 | 2010-03-05 13:01:18 +0100 | [diff] [blame] | 824 | /* |
Viresh Kumar | 0a0fca9 | 2013-06-04 13:10:24 +0530 | [diff] [blame] | 825 | * This has to have a higher priority than migration_notifier in sched/core.c. |
Peter Zijlstra | 3f6da39 | 2010-03-05 13:01:18 +0100 | [diff] [blame] | 826 | */ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 827 | #define perf_cpu_notifier(fn) \ |
| 828 | do { \ |
Paul Gortmaker | 0db0628 | 2013-06-19 14:53:51 -0400 | [diff] [blame^] | 829 | static struct notifier_block fn##_nb = \ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 830 | { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ |
Srivatsa S. Bhat | c13d38e | 2012-10-16 13:28:17 +0530 | [diff] [blame] | 831 | unsigned long cpu = smp_processor_id(); \ |
Srivatsa S. Bhat | 6760bca | 2012-10-16 13:28:10 +0530 | [diff] [blame] | 832 | unsigned long flags; \ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 833 | fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ |
Srivatsa S. Bhat | c13d38e | 2012-10-16 13:28:17 +0530 | [diff] [blame] | 834 | (void *)(unsigned long)cpu); \ |
Srivatsa S. Bhat | 6760bca | 2012-10-16 13:28:10 +0530 | [diff] [blame] | 835 | local_irq_save(flags); \ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 836 | fn(&fn##_nb, (unsigned long)CPU_STARTING, \ |
Srivatsa S. Bhat | c13d38e | 2012-10-16 13:28:17 +0530 | [diff] [blame] | 837 | (void *)(unsigned long)cpu); \ |
Srivatsa S. Bhat | 6760bca | 2012-10-16 13:28:10 +0530 | [diff] [blame] | 838 | local_irq_restore(flags); \ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 839 | fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ |
Srivatsa S. Bhat | c13d38e | 2012-10-16 13:28:17 +0530 | [diff] [blame] | 840 | (void *)(unsigned long)cpu); \ |
Ingo Molnar | e7e7ee2 | 2011-05-04 08:42:29 +0200 | [diff] [blame] | 841 | register_cpu_notifier(&fn##_nb); \ |
Peter Zijlstra | 3f6da39 | 2010-03-05 13:01:18 +0100 | [diff] [blame] | 842 | } while (0) |
| 843 | |
Jiri Olsa | 641cc93 | 2012-03-15 20:09:14 +0100 | [diff] [blame] | 844 | |
Sukadev Bhattiprolu | 2663960 | 2013-01-22 22:24:23 -0800 | [diff] [blame] | 845 | struct perf_pmu_events_attr { |
| 846 | struct device_attribute attr; |
| 847 | u64 id; |
Stephane Eranian | 3a54aaa | 2013-01-24 16:10:26 +0100 | [diff] [blame] | 848 | const char *event_str; |
Sukadev Bhattiprolu | 2663960 | 2013-01-22 22:24:23 -0800 | [diff] [blame] | 849 | }; |
| 850 | |
| 851 | #define PMU_EVENT_ATTR(_name, _var, _id, _show) \ |
| 852 | static struct perf_pmu_events_attr _var = { \ |
| 853 | .attr = __ATTR(_name, 0444, _show, NULL), \ |
| 854 | .id = _id, \ |
| 855 | }; |
| 856 | |
Jiri Olsa | 641cc93 | 2012-03-15 20:09:14 +0100 | [diff] [blame] | 857 | #define PMU_FORMAT_ATTR(_name, _format) \ |
| 858 | static ssize_t \ |
| 859 | _name##_show(struct device *dev, \ |
| 860 | struct device_attribute *attr, \ |
| 861 | char *page) \ |
| 862 | { \ |
| 863 | BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ |
| 864 | return sprintf(page, _format "\n"); \ |
| 865 | } \ |
| 866 | \ |
| 867 | static struct device_attribute format_attr_##_name = __ATTR_RO(_name) |
| 868 | |
Ingo Molnar | cdd6c48 | 2009-09-21 12:02:48 +0200 | [diff] [blame] | 869 | #endif /* _LINUX_PERF_EVENT_H */ |