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Thomas Gleixner0793a612008-12-04 20:12:29 +01001/*
Ingo Molnar57c0c152009-09-21 12:20:38 +02002 * Performance events:
Thomas Gleixner0793a612008-12-04 20:12:29 +01003 *
Ingo Molnara3084442009-06-11 14:44:26 +02004 * Copyright (C) 2008-2009, Thomas Gleixner <tglx@linutronix.de>
5 * Copyright (C) 2008-2009, Red Hat, Inc., Ingo Molnar
6 * Copyright (C) 2008-2009, Red Hat, Inc., Peter Zijlstra
Thomas Gleixner0793a612008-12-04 20:12:29 +01007 *
Ingo Molnar57c0c152009-09-21 12:20:38 +02008 * Data type definitions, declarations, prototypes.
Thomas Gleixner0793a612008-12-04 20:12:29 +01009 *
Ingo Molnara3084442009-06-11 14:44:26 +020010 * Started by: Thomas Gleixner and Ingo Molnar
Thomas Gleixner0793a612008-12-04 20:12:29 +010011 *
Ingo Molnar57c0c152009-09-21 12:20:38 +020012 * For licencing details see kernel-base/COPYING
Thomas Gleixner0793a612008-12-04 20:12:29 +010013 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +020014#ifndef _LINUX_PERF_EVENT_H
15#define _LINUX_PERF_EVENT_H
Thomas Gleixner0793a612008-12-04 20:12:29 +010016
Paul Mackerrasf3dfd262009-02-26 22:43:46 +110017#include <linux/types.h>
18#include <linux/ioctl.h>
Paul Mackerras9aaa1312009-03-21 15:31:47 +110019#include <asm/byteorder.h>
Thomas Gleixner0793a612008-12-04 20:12:29 +010020
21/*
Ingo Molnar9f66a382008-12-10 12:33:23 +010022 * User-space ABI bits:
23 */
24
25/*
Peter Zijlstra0d486962009-06-02 19:22:16 +020026 * attr.type
Peter Zijlstrab8e83512009-03-19 20:26:18 +010027 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020028enum perf_type_id {
Ingo Molnara3084442009-06-11 14:44:26 +020029 PERF_TYPE_HARDWARE = 0,
30 PERF_TYPE_SOFTWARE = 1,
31 PERF_TYPE_TRACEPOINT = 2,
32 PERF_TYPE_HW_CACHE = 3,
33 PERF_TYPE_RAW = 4,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020034 PERF_TYPE_BREAKPOINT = 5,
Peter Zijlstrab8e83512009-03-19 20:26:18 +010035
Ingo Molnara3084442009-06-11 14:44:26 +020036 PERF_TYPE_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010037};
38
39/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020040 * Generalized performance event event_id types, used by the
41 * attr.event_id parameter of the sys_perf_event_open()
Ingo Molnara3084442009-06-11 14:44:26 +020042 * syscall:
Thomas Gleixner0793a612008-12-04 20:12:29 +010043 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020044enum perf_hw_id {
Thomas Gleixner0793a612008-12-04 20:12:29 +010045 /*
Ingo Molnar9f66a382008-12-10 12:33:23 +010046 * Common hardware events, generalized by the kernel:
Thomas Gleixner0793a612008-12-04 20:12:29 +010047 */
Peter Zijlstraf4dbfa82009-06-11 14:06:28 +020048 PERF_COUNT_HW_CPU_CYCLES = 0,
49 PERF_COUNT_HW_INSTRUCTIONS = 1,
50 PERF_COUNT_HW_CACHE_REFERENCES = 2,
51 PERF_COUNT_HW_CACHE_MISSES = 3,
52 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
53 PERF_COUNT_HW_BRANCH_MISSES = 5,
54 PERF_COUNT_HW_BUS_CYCLES = 6,
Ingo Molnar9f66a382008-12-10 12:33:23 +010055
Ingo Molnara3084442009-06-11 14:44:26 +020056 PERF_COUNT_HW_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010057};
Ingo Molnar6c594c22008-12-14 12:34:15 +010058
Peter Zijlstrab8e83512009-03-19 20:26:18 +010059/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020060 * Generalized hardware cache events:
Ingo Molnar8326f442009-06-05 20:22:46 +020061 *
Peter Zijlstra8be6e8f2009-06-11 14:19:11 +020062 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
Ingo Molnar8326f442009-06-05 20:22:46 +020063 * { read, write, prefetch } x
64 * { accesses, misses }
65 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020066enum perf_hw_cache_id {
Ingo Molnara3084442009-06-11 14:44:26 +020067 PERF_COUNT_HW_CACHE_L1D = 0,
68 PERF_COUNT_HW_CACHE_L1I = 1,
69 PERF_COUNT_HW_CACHE_LL = 2,
70 PERF_COUNT_HW_CACHE_DTLB = 3,
71 PERF_COUNT_HW_CACHE_ITLB = 4,
72 PERF_COUNT_HW_CACHE_BPU = 5,
Ingo Molnar8326f442009-06-05 20:22:46 +020073
Ingo Molnara3084442009-06-11 14:44:26 +020074 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020075};
76
Peter Zijlstra1c432d82009-06-11 13:19:29 +020077enum perf_hw_cache_op_id {
Ingo Molnara3084442009-06-11 14:44:26 +020078 PERF_COUNT_HW_CACHE_OP_READ = 0,
79 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
80 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
Ingo Molnar8326f442009-06-05 20:22:46 +020081
Ingo Molnara3084442009-06-11 14:44:26 +020082 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020083};
84
Peter Zijlstra1c432d82009-06-11 13:19:29 +020085enum perf_hw_cache_op_result_id {
86 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
87 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
Ingo Molnar8326f442009-06-05 20:22:46 +020088
Ingo Molnara3084442009-06-11 14:44:26 +020089 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020090};
91
92/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020093 * Special "software" events provided by the kernel, even if the hardware
94 * does not support performance events. These events measure various
Peter Zijlstrab8e83512009-03-19 20:26:18 +010095 * physical and sw events of the kernel (and allow the profiling of them as
96 * well):
97 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020098enum perf_sw_ids {
Ingo Molnara3084442009-06-11 14:44:26 +020099 PERF_COUNT_SW_CPU_CLOCK = 0,
100 PERF_COUNT_SW_TASK_CLOCK = 1,
101 PERF_COUNT_SW_PAGE_FAULTS = 2,
102 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
103 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
104 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
105 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
Anton Blanchardf7d79862009-10-18 01:09:29 +0000106 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
107 PERF_COUNT_SW_EMULATION_FAULTS = 8,
Ingo Molnar6c594c22008-12-14 12:34:15 +0100108
Ingo Molnara3084442009-06-11 14:44:26 +0200109 PERF_COUNT_SW_MAX, /* non-ABI */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100110};
111
Ingo Molnar9f66a382008-12-10 12:33:23 +0100112/*
Peter Zijlstra0d486962009-06-02 19:22:16 +0200113 * Bits that can be set in attr.sample_type to request information
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200114 * in the overflow packets.
115 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200116enum perf_event_sample_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200117 PERF_SAMPLE_IP = 1U << 0,
118 PERF_SAMPLE_TID = 1U << 1,
119 PERF_SAMPLE_TIME = 1U << 2,
120 PERF_SAMPLE_ADDR = 1U << 3,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200121 PERF_SAMPLE_READ = 1U << 4,
Ingo Molnara3084442009-06-11 14:44:26 +0200122 PERF_SAMPLE_CALLCHAIN = 1U << 5,
123 PERF_SAMPLE_ID = 1U << 6,
124 PERF_SAMPLE_CPU = 1U << 7,
125 PERF_SAMPLE_PERIOD = 1U << 8,
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200126 PERF_SAMPLE_STREAM_ID = 1U << 9,
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200127 PERF_SAMPLE_RAW = 1U << 10,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200128
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200129 PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200130};
131
132/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200133 * The format of the data returned by read() on a perf event fd,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200134 * as specified by attr.read_format:
135 *
136 * struct read_format {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200137 * { u64 value;
138 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
139 * { u64 time_running; } && PERF_FORMAT_RUNNING
140 * { u64 id; } && PERF_FORMAT_ID
141 * } && !PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200142 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200143 * { u64 nr;
144 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
145 * { u64 time_running; } && PERF_FORMAT_RUNNING
146 * { u64 value;
147 * { u64 id; } && PERF_FORMAT_ID
148 * } cntr[nr];
149 * } && PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200150 * };
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100151 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200152enum perf_event_read_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200153 PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
154 PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
155 PERF_FORMAT_ID = 1U << 2,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200156 PERF_FORMAT_GROUP = 1U << 3,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200157
Ingo Molnar57c0c152009-09-21 12:20:38 +0200158 PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100159};
160
Peter Zijlstra974802e2009-06-12 12:46:55 +0200161#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
162
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100163/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200164 * Hardware event_id to monitor via a performance monitoring event:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100165 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200166struct perf_event_attr {
Peter Zijlstra974802e2009-06-12 12:46:55 +0200167
Peter Zijlstraf4a2deb2009-03-23 18:22:06 +0100168 /*
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200169 * Major type: hardware/software/tracepoint/etc.
170 */
171 __u32 type;
Peter Zijlstra974802e2009-06-12 12:46:55 +0200172
173 /*
174 * Size of the attr structure, for fwd/bwd compat.
175 */
176 __u32 size;
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200177
178 /*
179 * Type specific configuration information.
Peter Zijlstraf4a2deb2009-03-23 18:22:06 +0100180 */
181 __u64 config;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100182
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200183 union {
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200184 __u64 sample_period;
185 __u64 sample_freq;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200186 };
187
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200188 __u64 sample_type;
189 __u64 read_format;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100190
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100191 __u64 disabled : 1, /* off by default */
Paul Mackerras0475f9e2009-02-11 14:35:35 +1100192 inherit : 1, /* children inherit it */
193 pinned : 1, /* must always be on PMU */
194 exclusive : 1, /* only group on PMU */
195 exclude_user : 1, /* don't count user */
196 exclude_kernel : 1, /* ditto kernel */
197 exclude_hv : 1, /* ditto hypervisor */
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100198 exclude_idle : 1, /* don't count when idle */
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200199 mmap : 1, /* include mmap data */
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200200 comm : 1, /* include comm data */
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200201 freq : 1, /* use freq, not period */
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200202 inherit_stat : 1, /* per task counts */
Paul Mackerras57e79862009-06-30 16:07:19 +1000203 enable_on_exec : 1, /* next exec enables */
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200204 task : 1, /* trace fork/exit */
Peter Zijlstra2667de812009-09-17 19:01:10 +0200205 watermark : 1, /* wakeup_watermark */
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100206
Peter Zijlstra2667de812009-09-17 19:01:10 +0200207 __reserved_1 : 49;
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100208
Peter Zijlstra2667de812009-09-17 19:01:10 +0200209 union {
210 __u32 wakeup_events; /* wakeup every n events */
211 __u32 wakeup_watermark; /* bytes before wakeup */
212 };
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200213
Frederic Weisbecker189f2022009-12-03 23:16:07 +0100214 struct { /* Hardware breakpoint info */
215 __u64 bp_addr;
216 __u32 bp_type;
217 __u32 bp_len;
218 __u64 __bp_reserved_1;
219 __u64 __bp_reserved_2;
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200220 };
221
Peter Zijlstra974802e2009-06-12 12:46:55 +0200222 __u32 __reserved_2;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100223
Peter Zijlstra974802e2009-06-12 12:46:55 +0200224 __u64 __reserved_3;
Thomas Gleixnereab656a2008-12-08 19:26:59 +0100225};
226
Ingo Molnar9f66a382008-12-10 12:33:23 +0100227/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200228 * Ioctls that can be done on a perf event fd:
Paul Mackerrasd859e292009-01-17 18:10:22 +1100229 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200230#define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
Ingo Molnar57c0c152009-09-21 12:20:38 +0200231#define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
232#define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200233#define PERF_EVENT_IOC_RESET _IO ('$', 3)
Arjan van de Ven4c49b122009-11-13 21:47:33 -0800234#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200235#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
Li Zefan6fb29152009-10-15 11:21:42 +0800236#define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200237
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200238enum perf_event_ioc_flags {
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200239 PERF_IOC_FLAG_GROUP = 1U << 0,
240};
Paul Mackerrasd859e292009-01-17 18:10:22 +1100241
Paul Mackerras37d81822009-03-23 18:22:08 +0100242/*
243 * Structure of the page that can be mapped via mmap
244 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200245struct perf_event_mmap_page {
Paul Mackerras37d81822009-03-23 18:22:08 +0100246 __u32 version; /* version number of this structure */
247 __u32 compat_version; /* lowest version this is compat with */
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200248
249 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200250 * Bits needed to read the hw events in user-space.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200251 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200252 * u32 seq;
253 * s64 count;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200254 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200255 * do {
256 * seq = pc->lock;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200257 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200258 * barrier()
259 * if (pc->index) {
260 * count = pmc_read(pc->index - 1);
261 * count += pc->offset;
262 * } else
263 * goto regular_read;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200264 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200265 * barrier();
266 * } while (pc->lock != seq);
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200267 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200268 * NOTE: for obvious reason this only works on self-monitoring
269 * processes.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200270 */
Paul Mackerras37d81822009-03-23 18:22:08 +0100271 __u32 lock; /* seqlock for synchronization */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200272 __u32 index; /* hardware event identifier */
273 __s64 offset; /* add to hardware event value */
274 __u64 time_enabled; /* time event active */
275 __u64 time_running; /* time event on cpu */
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100276
Peter Zijlstra41f95332009-06-23 17:55:18 +0200277 /*
278 * Hole for extension of the self monitor capabilities
279 */
280
Peter Zijlstra7f8b4e42009-06-22 14:34:35 +0200281 __u64 __reserved[123]; /* align to 1k */
Peter Zijlstra41f95332009-06-23 17:55:18 +0200282
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200283 /*
284 * Control data for the mmap() data buffer.
285 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100286 * User-space reading the @data_head value should issue an rmb(), on
287 * SMP capable platforms, after reading this value -- see
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200288 * perf_event_wakeup().
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100289 *
290 * When the mapping is PROT_WRITE the @data_tail value should be
291 * written by userspace to reflect the last read data. In this case
292 * the kernel will not over-write unread data.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200293 */
Peter Zijlstra8e3747c2009-06-02 16:16:02 +0200294 __u64 data_head; /* head in the data section */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100295 __u64 data_tail; /* user-space written tail */
Paul Mackerras37d81822009-03-23 18:22:08 +0100296};
297
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200298#define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
299#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
300#define PERF_RECORD_MISC_KERNEL (1 << 0)
301#define PERF_RECORD_MISC_USER (2 << 0)
302#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200303
Peter Zijlstra5c148192009-03-25 12:30:23 +0100304struct perf_event_header {
305 __u32 type;
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200306 __u16 misc;
307 __u16 size;
Peter Zijlstra5c148192009-03-25 12:30:23 +0100308};
309
310enum perf_event_type {
Peter Zijlstra5ed00412009-03-30 19:07:12 +0200311
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200312 /*
313 * The MMAP events record the PROT_EXEC mappings so that we can
314 * correlate userspace IPs to code. They have the following structure:
315 *
316 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200317 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200318 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200319 * u32 pid, tid;
320 * u64 addr;
321 * u64 len;
322 * u64 pgoff;
323 * char filename[];
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200324 * };
325 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200326 PERF_RECORD_MMAP = 1,
Peter Zijlstraea5d20c2009-03-25 12:30:25 +0100327
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200328 /*
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200329 * struct {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200330 * struct perf_event_header header;
331 * u64 id;
332 * u64 lost;
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100333 * };
334 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200335 PERF_RECORD_LOST = 2,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100336
337 /*
338 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200339 * struct perf_event_header header;
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200340 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200341 * u32 pid, tid;
342 * char comm[];
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200343 * };
344 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200345 PERF_RECORD_COMM = 3,
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200346
347 /*
Peter Zijlstra26b119b2009-05-20 12:21:20 +0200348 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200349 * struct perf_event_header header;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200350 * u32 pid, ppid;
351 * u32 tid, ptid;
Arjan van de Ven393b2ad2009-09-12 07:52:47 +0200352 * u64 time;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200353 * };
354 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200355 PERF_RECORD_EXIT = 4,
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200356
357 /*
358 * struct {
359 * struct perf_event_header header;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200360 * u64 time;
Peter Zijlstra689802b2009-06-05 15:05:43 +0200361 * u64 id;
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200362 * u64 stream_id;
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200363 * };
364 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200365 PERF_RECORD_THROTTLE = 5,
366 PERF_RECORD_UNTHROTTLE = 6,
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200367
368 /*
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200369 * struct {
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200370 * struct perf_event_header header;
371 * u32 pid, ppid;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200372 * u32 tid, ptid;
Anton Blancharda6f10a22009-09-22 22:34:24 +1000373 * u64 time;
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200374 * };
375 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200376 PERF_RECORD_FORK = 7,
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200377
378 /*
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200379 * struct {
380 * struct perf_event_header header;
381 * u32 pid, tid;
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200382 *
383 * struct read_format values;
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200384 * };
385 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200386 PERF_RECORD_READ = 8,
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200387
388 /*
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200389 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200390 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200391 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100392 * { u64 ip; } && PERF_SAMPLE_IP
393 * { u32 pid, tid; } && PERF_SAMPLE_TID
394 * { u64 time; } && PERF_SAMPLE_TIME
395 * { u64 addr; } && PERF_SAMPLE_ADDR
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200396 * { u64 id; } && PERF_SAMPLE_ID
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200397 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100398 * { u32 cpu, res; } && PERF_SAMPLE_CPU
Ingo Molnar57c0c152009-09-21 12:20:38 +0200399 * { u64 period; } && PERF_SAMPLE_PERIOD
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200400 *
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200401 * { struct read_format values; } && PERF_SAMPLE_READ
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200402 *
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200403 * { u64 nr,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100404 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200405 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200406 * #
407 * # The RAW record below is opaque data wrt the ABI
408 * #
409 * # That is, the ABI doesn't make any promises wrt to
410 * # the stability of its content, it may vary depending
411 * # on event, hardware, kernel version and phase of
412 * # the moon.
413 * #
414 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
415 * #
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200416 *
Peter Zijlstraa0445602009-08-10 11:16:52 +0200417 * { u32 size;
418 * char data[size];}&& PERF_SAMPLE_RAW
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200419 * };
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200420 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200421 PERF_RECORD_SAMPLE = 9,
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200422
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200423 PERF_RECORD_MAX, /* non-ABI */
Peter Zijlstra5c148192009-03-25 12:30:23 +0100424};
425
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200426enum perf_callchain_context {
427 PERF_CONTEXT_HV = (__u64)-32,
428 PERF_CONTEXT_KERNEL = (__u64)-128,
429 PERF_CONTEXT_USER = (__u64)-512,
Ingo Molnar75220602009-06-18 08:00:17 +0200430
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200431 PERF_CONTEXT_GUEST = (__u64)-2048,
432 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
433 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
434
435 PERF_CONTEXT_MAX = (__u64)-4095,
Ingo Molnar75220602009-06-18 08:00:17 +0200436};
437
Peter Zijlstraa4be7c22009-08-19 11:18:27 +0200438#define PERF_FLAG_FD_NO_GROUP (1U << 0)
439#define PERF_FLAG_FD_OUTPUT (1U << 1)
440
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100441#ifdef __KERNEL__
Paul Mackerrasd859e292009-01-17 18:10:22 +1100442/*
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100443 * Kernel-internal data types and definitions:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100444 */
445
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200446#ifdef CONFIG_PERF_EVENTS
447# include <asm/perf_event.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100448#endif
449
Arnd Bergmann2ff6cfd2009-12-07 17:12:58 +0100450#ifdef CONFIG_HAVE_HW_BREAKPOINT
451#include <asm/hw_breakpoint.h>
452#endif
453
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100454#include <linux/list.h>
455#include <linux/mutex.h>
456#include <linux/rculist.h>
457#include <linux/rcupdate.h>
458#include <linux/spinlock.h>
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100459#include <linux/hrtimer.h>
Peter Zijlstra3c446b32009-04-06 11:45:01 +0200460#include <linux/fs.h>
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200461#include <linux/pid_namespace.h>
Peter Zijlstra906010b2009-09-21 16:08:49 +0200462#include <linux/workqueue.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100463#include <asm/atomic.h>
464
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200465#define PERF_MAX_STACK_DEPTH 255
466
467struct perf_callchain_entry {
468 __u64 nr;
469 __u64 ip[PERF_MAX_STACK_DEPTH];
470};
471
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200472struct perf_raw_record {
473 u32 size;
474 void *data;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200475};
476
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100477struct task_struct;
478
Thomas Gleixner0793a612008-12-04 20:12:29 +0100479/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200480 * struct hw_perf_event - performance event hardware details:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100481 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200482struct hw_perf_event {
483#ifdef CONFIG_PERF_EVENTS
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100484 union {
485 struct { /* hardware */
Ingo Molnara3084442009-06-11 14:44:26 +0200486 u64 config;
487 unsigned long config_base;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200488 unsigned long event_base;
Ingo Molnara3084442009-06-11 14:44:26 +0200489 int idx;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100490 };
Soeren Sandmann721a6692009-09-15 14:33:08 +0200491 struct { /* software */
492 s64 remaining;
Ingo Molnara3084442009-06-11 14:44:26 +0200493 struct hrtimer hrtimer;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100494 };
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200495#ifdef CONFIG_HAVE_HW_BREAKPOINT
496 union { /* breakpoint */
497 struct arch_hw_breakpoint info;
498 };
499#endif
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100500 };
Ingo Molnaree060942008-12-13 09:00:03 +0100501 atomic64_t prev_count;
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200502 u64 sample_period;
Peter Zijlstra9e350de2009-06-10 21:34:59 +0200503 u64 last_period;
Ingo Molnaree060942008-12-13 09:00:03 +0100504 atomic64_t period_left;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200505 u64 interrupts;
Peter Zijlstra6a24ed6c2009-06-05 18:01:29 +0200506
507 u64 freq_count;
508 u64 freq_interrupts;
Peter Zijlstrabd2b5b12009-06-10 13:40:57 +0200509 u64 freq_stamp;
Ingo Molnaree060942008-12-13 09:00:03 +0100510#endif
Thomas Gleixner0793a612008-12-04 20:12:29 +0100511};
512
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200513struct perf_event;
Ingo Molnar621a01e2008-12-11 12:46:46 +0100514
515/**
Robert Richter4aeb0b42009-04-29 12:47:03 +0200516 * struct pmu - generic performance monitoring unit
Ingo Molnar621a01e2008-12-11 12:46:46 +0100517 */
Robert Richter4aeb0b42009-04-29 12:47:03 +0200518struct pmu {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200519 int (*enable) (struct perf_event *event);
520 void (*disable) (struct perf_event *event);
521 void (*read) (struct perf_event *event);
522 void (*unthrottle) (struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100523};
524
Thomas Gleixner0793a612008-12-04 20:12:29 +0100525/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200526 * enum perf_event_active_state - the states of a event
Ingo Molnar6a930702008-12-11 15:17:03 +0100527 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200528enum perf_event_active_state {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200529 PERF_EVENT_STATE_ERROR = -2,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200530 PERF_EVENT_STATE_OFF = -1,
531 PERF_EVENT_STATE_INACTIVE = 0,
Ingo Molnar57c0c152009-09-21 12:20:38 +0200532 PERF_EVENT_STATE_ACTIVE = 1,
Ingo Molnar6a930702008-12-11 15:17:03 +0100533};
534
Ingo Molnar9b51f662008-12-12 13:49:45 +0100535struct file;
536
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100537struct perf_mmap_data {
538 struct rcu_head rcu_head;
Peter Zijlstra906010b2009-09-21 16:08:49 +0200539#ifdef CONFIG_PERF_USE_VMALLOC
540 struct work_struct work;
541#endif
542 int data_order;
Peter Zijlstra8740f942009-04-08 15:01:29 +0200543 int nr_pages; /* nr of data pages */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100544 int writable; /* are we writable */
Peter Zijlstrac5078f72009-05-05 17:50:24 +0200545 int nr_locked; /* nr pages mlocked */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200546
Peter Zijlstrac33a0bc2009-05-01 12:23:16 +0200547 atomic_t poll; /* POLL_ for wakeups */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200548 atomic_t events; /* event_id limit */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200549
Peter Zijlstra8e3747c2009-06-02 16:16:02 +0200550 atomic_long_t head; /* write position */
551 atomic_long_t done_head; /* completed head */
552
Peter Zijlstrac33a0bc2009-05-01 12:23:16 +0200553 atomic_t lock; /* concurrent writes */
Peter Zijlstrac66de4a2009-05-05 17:50:22 +0200554 atomic_t wakeup; /* needs a wakeup */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100555 atomic_t lost; /* nr records lost */
Peter Zijlstrac66de4a2009-05-05 17:50:22 +0200556
Peter Zijlstra2667de812009-09-17 19:01:10 +0200557 long watermark; /* wakeup watermark */
558
Ingo Molnar57c0c152009-09-21 12:20:38 +0200559 struct perf_event_mmap_page *user_page;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200560 void *data_pages[0];
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100561};
562
Peter Zijlstra671dec52009-04-06 11:45:02 +0200563struct perf_pending_entry {
564 struct perf_pending_entry *next;
565 void (*func)(struct perf_pending_entry *);
Peter Zijlstra925d5192009-03-30 19:07:02 +0200566};
567
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100568struct perf_sample_data;
569
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100570typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
571 struct perf_sample_data *,
572 struct pt_regs *regs);
573
Ingo Molnar6a930702008-12-11 15:17:03 +0100574/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200575 * struct perf_event - performance event kernel representation:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100576 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200577struct perf_event {
578#ifdef CONFIG_PERF_EVENTS
Ingo Molnar65abc862009-09-21 10:18:27 +0200579 struct list_head group_entry;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100580 struct list_head event_entry;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100581 struct list_head sibling_list;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200582 int nr_siblings;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200583 struct perf_event *group_leader;
584 struct perf_event *output;
Robert Richter4aeb0b42009-04-29 12:47:03 +0200585 const struct pmu *pmu;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100586
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200587 enum perf_event_active_state state;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100588 atomic64_t count;
Ingo Molnaree060942008-12-13 09:00:03 +0100589
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100590 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200591 * These are the total time in nanoseconds that the event
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100592 * has been enabled (i.e. eligible to run, and the task has
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200593 * been scheduled in, if this is a per-task event)
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100594 * and running (scheduled onto the CPU), respectively.
595 *
596 * They are computed from tstamp_enabled, tstamp_running and
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200597 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100598 */
599 u64 total_time_enabled;
600 u64 total_time_running;
601
602 /*
603 * These are timestamps used for computing total_time_enabled
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200604 * and total_time_running when the event is in INACTIVE or
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100605 * ACTIVE state, measured in nanoseconds from an arbitrary point
606 * in time.
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200607 * tstamp_enabled: the notional time when the event was enabled
608 * tstamp_running: the notional time when the event was scheduled on
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100609 * tstamp_stopped: in INACTIVE state, the notional time when the
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200610 * event was scheduled off.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100611 */
612 u64 tstamp_enabled;
613 u64 tstamp_running;
614 u64 tstamp_stopped;
615
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200616 struct perf_event_attr attr;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200617 struct hw_perf_event hw;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100618
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200619 struct perf_event_context *ctx;
Ingo Molnar9b51f662008-12-12 13:49:45 +0100620 struct file *filp;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100621
622 /*
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100623 * These accumulate total time (in nanoseconds) that children
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200624 * events have been enabled and running, respectively.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100625 */
626 atomic64_t child_total_time_enabled;
627 atomic64_t child_total_time_running;
628
629 /*
Paul Mackerrasd859e292009-01-17 18:10:22 +1100630 * Protect attach/detach and child_list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100631 */
Peter Zijlstrafccc7142009-05-23 18:28:56 +0200632 struct mutex child_mutex;
633 struct list_head child_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200634 struct perf_event *parent;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100635
636 int oncpu;
637 int cpu;
638
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200639 struct list_head owner_entry;
640 struct task_struct *owner;
641
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100642 /* mmap bits */
643 struct mutex mmap_mutex;
644 atomic_t mmap_count;
645 struct perf_mmap_data *data;
Paul Mackerras37d81822009-03-23 18:22:08 +0100646
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100647 /* poll related */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100648 wait_queue_head_t waitq;
Peter Zijlstra3c446b32009-04-06 11:45:01 +0200649 struct fasync_struct *fasync;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200650
651 /* delayed work for NMIs and such */
652 int pending_wakeup;
Peter Zijlstra4c9e2542009-04-06 11:45:09 +0200653 int pending_kill;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200654 int pending_disable;
Peter Zijlstra671dec52009-04-06 11:45:02 +0200655 struct perf_pending_entry pending;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100656
Peter Zijlstra79f14642009-04-06 11:45:07 +0200657 atomic_t event_limit;
658
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200659 void (*destroy)(struct perf_event *);
Peter Zijlstra592903c2009-03-13 12:21:36 +0100660 struct rcu_head rcu_head;
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200661
662 struct pid_namespace *ns;
Peter Zijlstra8e5799b2009-06-02 15:08:15 +0200663 u64 id;
Li Zefan6fb29152009-10-15 11:21:42 +0800664
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100665 perf_overflow_handler_t overflow_handler;
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100666
Li Zefan6fb29152009-10-15 11:21:42 +0800667#ifdef CONFIG_EVENT_PROFILE
668 struct event_filter *filter;
Ingo Molnaree060942008-12-13 09:00:03 +0100669#endif
Li Zefan6fb29152009-10-15 11:21:42 +0800670
671#endif /* CONFIG_PERF_EVENTS */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100672};
673
674/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200675 * struct perf_event_context - event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100676 *
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200677 * Used as a container for task events and CPU events as well:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100678 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200679struct perf_event_context {
Thomas Gleixner0793a612008-12-04 20:12:29 +0100680 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200681 * Protect the states of the events in the list,
Paul Mackerrasd859e292009-01-17 18:10:22 +1100682 * nr_active, and the list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100683 */
Ingo Molnara3084442009-06-11 14:44:26 +0200684 spinlock_t lock;
Paul Mackerrasd859e292009-01-17 18:10:22 +1100685 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200686 * Protect the list of events. Locking either mutex or lock
Paul Mackerrasd859e292009-01-17 18:10:22 +1100687 * is sufficient to ensure the list doesn't change; to change
688 * the list you need to lock both the mutex and the spinlock.
689 */
Ingo Molnara3084442009-06-11 14:44:26 +0200690 struct mutex mutex;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100691
Ingo Molnar65abc862009-09-21 10:18:27 +0200692 struct list_head group_list;
Ingo Molnara3084442009-06-11 14:44:26 +0200693 struct list_head event_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200694 int nr_events;
Ingo Molnara3084442009-06-11 14:44:26 +0200695 int nr_active;
696 int is_active;
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200697 int nr_stat;
Ingo Molnara3084442009-06-11 14:44:26 +0200698 atomic_t refcount;
699 struct task_struct *task;
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100700
701 /*
Peter Zijlstra4af49982009-04-06 11:45:10 +0200702 * Context clock, runs when context enabled.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100703 */
Ingo Molnara3084442009-06-11 14:44:26 +0200704 u64 time;
705 u64 timestamp;
Paul Mackerras564c2b22009-05-22 14:27:22 +1000706
707 /*
708 * These fields let us detect when two contexts have both
709 * been cloned (inherited) from a common ancestor.
710 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200711 struct perf_event_context *parent_ctx;
Ingo Molnara3084442009-06-11 14:44:26 +0200712 u64 parent_gen;
713 u64 generation;
714 int pin_count;
715 struct rcu_head rcu_head;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100716};
717
718/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200719 * struct perf_event_cpu_context - per cpu event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100720 */
721struct perf_cpu_context {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200722 struct perf_event_context ctx;
723 struct perf_event_context *task_ctx;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100724 int active_oncpu;
725 int max_pertask;
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100726 int exclusive;
Peter Zijlstra96f6d442009-03-23 18:22:07 +0100727
728 /*
729 * Recursion avoidance:
730 *
731 * task, softirq, irq, nmi context
732 */
Ingo Molnar22a4f652009-06-01 10:13:37 +0200733 int recursion[4];
Thomas Gleixner0793a612008-12-04 20:12:29 +0100734};
735
Markus Metzger5622f292009-09-15 13:00:23 +0200736struct perf_output_handle {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200737 struct perf_event *event;
738 struct perf_mmap_data *data;
739 unsigned long head;
740 unsigned long offset;
741 int nmi;
742 int sample;
743 int locked;
Markus Metzger5622f292009-09-15 13:00:23 +0200744};
745
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200746#ifdef CONFIG_PERF_EVENTS
Robert Richter829b42d2009-04-29 12:46:59 +0200747
Thomas Gleixner0793a612008-12-04 20:12:29 +0100748/*
749 * Set by architecture code:
750 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200751extern int perf_max_events;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100752
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200753extern const struct pmu *hw_perf_event_init(struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100754
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200755extern void perf_event_task_sched_in(struct task_struct *task, int cpu);
756extern void perf_event_task_sched_out(struct task_struct *task,
Paul Mackerras564c2b22009-05-22 14:27:22 +1000757 struct task_struct *next, int cpu);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200758extern void perf_event_task_tick(struct task_struct *task, int cpu);
759extern int perf_event_init_task(struct task_struct *child);
760extern void perf_event_exit_task(struct task_struct *child);
761extern void perf_event_free_task(struct task_struct *task);
762extern void set_perf_event_pending(void);
763extern void perf_event_do_pending(void);
764extern void perf_event_print_debug(void);
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200765extern void __perf_disable(void);
766extern bool __perf_enable(void);
767extern void perf_disable(void);
768extern void perf_enable(void);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200769extern int perf_event_task_disable(void);
770extern int perf_event_task_enable(void);
771extern int hw_perf_group_sched_in(struct perf_event *group_leader,
Paul Mackerras3cbed422009-01-09 16:43:42 +1100772 struct perf_cpu_context *cpuctx,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200773 struct perf_event_context *ctx, int cpu);
774extern void perf_event_update_userpage(struct perf_event *event);
Arjan van de Venfb0459d2009-09-25 12:25:56 +0200775extern int perf_event_release_kernel(struct perf_event *event);
776extern struct perf_event *
777perf_event_create_kernel_counter(struct perf_event_attr *attr,
778 int cpu,
Frederic Weisbecker97eaf532009-10-18 15:33:50 +0200779 pid_t pid,
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100780 perf_overflow_handler_t callback);
Peter Zijlstra59ed4462009-11-20 22:19:55 +0100781extern u64 perf_event_read_value(struct perf_event *event,
782 u64 *enabled, u64 *running);
Ingo Molnar5c92d122008-12-11 13:21:10 +0100783
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200784struct perf_sample_data {
Markus Metzger5622f292009-09-15 13:00:23 +0200785 u64 type;
786
787 u64 ip;
788 struct {
789 u32 pid;
790 u32 tid;
791 } tid_entry;
792 u64 time;
Ingo Molnara3084442009-06-11 14:44:26 +0200793 u64 addr;
Markus Metzger5622f292009-09-15 13:00:23 +0200794 u64 id;
795 u64 stream_id;
796 struct {
797 u32 cpu;
798 u32 reserved;
799 } cpu_entry;
Ingo Molnara3084442009-06-11 14:44:26 +0200800 u64 period;
Markus Metzger5622f292009-09-15 13:00:23 +0200801 struct perf_callchain_entry *callchain;
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200802 struct perf_raw_record *raw;
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200803};
804
Markus Metzger5622f292009-09-15 13:00:23 +0200805extern void perf_output_sample(struct perf_output_handle *handle,
806 struct perf_event_header *header,
807 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200808 struct perf_event *event);
Markus Metzger5622f292009-09-15 13:00:23 +0200809extern void perf_prepare_sample(struct perf_event_header *header,
810 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200811 struct perf_event *event,
Markus Metzger5622f292009-09-15 13:00:23 +0200812 struct pt_regs *regs);
813
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200814extern int perf_event_overflow(struct perf_event *event, int nmi,
Markus Metzger5622f292009-09-15 13:00:23 +0200815 struct perf_sample_data *data,
816 struct pt_regs *regs);
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200817
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100818/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200819 * Return 1 for a software event, 0 for a hardware event
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100820 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200821static inline int is_software_event(struct perf_event *event)
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100822{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200823 return (event->attr.type != PERF_TYPE_RAW) &&
824 (event->attr.type != PERF_TYPE_HARDWARE) &&
825 (event->attr.type != PERF_TYPE_HW_CACHE);
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100826}
827
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200828extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200829
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200830extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200831
832static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200833perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200834{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200835 if (atomic_read(&perf_swevent_enabled[event_id]))
836 __perf_sw_event(event_id, nr, nmi, regs, addr);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200837}
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100838
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200839extern void __perf_event_mmap(struct vm_area_struct *vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200840
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200841static inline void perf_event_mmap(struct vm_area_struct *vma)
Peter Zijlstra089dd792009-06-05 14:04:55 +0200842{
843 if (vma->vm_flags & VM_EXEC)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200844 __perf_event_mmap(vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200845}
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200846
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200847extern void perf_event_comm(struct task_struct *tsk);
848extern void perf_event_fork(struct task_struct *tsk);
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200849
Peter Zijlstra394ee072009-03-30 19:07:14 +0200850extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
851
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200852extern int sysctl_perf_event_paranoid;
853extern int sysctl_perf_event_mlock;
854extern int sysctl_perf_event_sample_rate;
Peter Zijlstra1ccd1542009-04-09 10:53:45 +0200855
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200856extern void perf_event_init(void);
857extern void perf_tp_event(int event_id, u64 addr, u64 count,
Jason Baronf4b5ffc2009-08-10 16:53:02 -0400858 void *record, int entry_size);
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200859extern void perf_bp_event(struct perf_event *event, void *data);
Ingo Molnar0d905bc2009-05-04 19:13:30 +0200860
Paul Mackerras9d23a902009-05-14 21:48:08 +1000861#ifndef perf_misc_flags
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200862#define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
863 PERF_RECORD_MISC_KERNEL)
Paul Mackerras9d23a902009-05-14 21:48:08 +1000864#define perf_instruction_pointer(regs) instruction_pointer(regs)
865#endif
866
Markus Metzger5622f292009-09-15 13:00:23 +0200867extern int perf_output_begin(struct perf_output_handle *handle,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200868 struct perf_event *event, unsigned int size,
Markus Metzger5622f292009-09-15 13:00:23 +0200869 int nmi, int sample);
870extern void perf_output_end(struct perf_output_handle *handle);
871extern void perf_output_copy(struct perf_output_handle *handle,
872 const void *buf, unsigned int len);
Peter Zijlstra4ed7c922009-11-23 11:37:29 +0100873extern int perf_swevent_get_recursion_context(void);
874extern void perf_swevent_put_recursion_context(int rctx);
Frederic Weisbecker44234ad2009-12-09 09:25:48 +0100875extern void perf_event_enable(struct perf_event *event);
876extern void perf_event_disable(struct perf_event *event);
Thomas Gleixner0793a612008-12-04 20:12:29 +0100877#else
878static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200879perf_event_task_sched_in(struct task_struct *task, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100880static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200881perf_event_task_sched_out(struct task_struct *task,
Ingo Molnar910431c2009-05-22 12:32:15 +0200882 struct task_struct *next, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100883static inline void
Ingo Molnar57c0c152009-09-21 12:20:38 +0200884perf_event_task_tick(struct task_struct *task, int cpu) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200885static inline int perf_event_init_task(struct task_struct *child) { return 0; }
886static inline void perf_event_exit_task(struct task_struct *child) { }
887static inline void perf_event_free_task(struct task_struct *task) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200888static inline void perf_event_do_pending(void) { }
889static inline void perf_event_print_debug(void) { }
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200890static inline void perf_disable(void) { }
891static inline void perf_enable(void) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200892static inline int perf_event_task_disable(void) { return -EINVAL; }
893static inline int perf_event_task_enable(void) { return -EINVAL; }
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100894
Peter Zijlstra925d5192009-03-30 19:07:02 +0200895static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200896perf_sw_event(u32 event_id, u64 nr, int nmi,
Peter Zijlstra78f13e92009-04-08 15:01:33 +0200897 struct pt_regs *regs, u64 addr) { }
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200898static inline void
899perf_bp_event(struct perf_event *event, void *data) { }
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200900
Ingo Molnar57c0c152009-09-21 12:20:38 +0200901static inline void perf_event_mmap(struct vm_area_struct *vma) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200902static inline void perf_event_comm(struct task_struct *tsk) { }
903static inline void perf_event_fork(struct task_struct *tsk) { }
904static inline void perf_event_init(void) { }
Peter Zijlstra4ed7c922009-11-23 11:37:29 +0100905static inline int perf_swevent_get_recursion_context(void) { return -1; }
906static inline void perf_swevent_put_recursion_context(int rctx) { }
Frederic Weisbecker44234ad2009-12-09 09:25:48 +0100907static inline void perf_event_enable(struct perf_event *event) { }
908static inline void perf_event_disable(struct perf_event *event) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100909#endif
910
Markus Metzger5622f292009-09-15 13:00:23 +0200911#define perf_output_put(handle, x) \
912 perf_output_copy((handle), &(x), sizeof(x))
913
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100914#endif /* __KERNEL__ */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200915#endif /* _LINUX_PERF_EVENT_H */