blob: 53230e99e9ea805fc74dc7f965f9e6f9522be4f8 [file] [log] [blame]
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
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020021#ifdef CONFIG_HAVE_HW_BREAKPOINT
22#include <asm/hw_breakpoint.h>
23#endif
24
Thomas Gleixner0793a612008-12-04 20:12:29 +010025/*
Ingo Molnar9f66a382008-12-10 12:33:23 +010026 * User-space ABI bits:
27 */
28
29/*
Peter Zijlstra0d486962009-06-02 19:22:16 +020030 * attr.type
Peter Zijlstrab8e83512009-03-19 20:26:18 +010031 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020032enum perf_type_id {
Ingo Molnara3084442009-06-11 14:44:26 +020033 PERF_TYPE_HARDWARE = 0,
34 PERF_TYPE_SOFTWARE = 1,
35 PERF_TYPE_TRACEPOINT = 2,
36 PERF_TYPE_HW_CACHE = 3,
37 PERF_TYPE_RAW = 4,
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020038 PERF_TYPE_BREAKPOINT = 5,
Peter Zijlstrab8e83512009-03-19 20:26:18 +010039
Ingo Molnara3084442009-06-11 14:44:26 +020040 PERF_TYPE_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010041};
42
43/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020044 * Generalized performance event event_id types, used by the
45 * attr.event_id parameter of the sys_perf_event_open()
Ingo Molnara3084442009-06-11 14:44:26 +020046 * syscall:
Thomas Gleixner0793a612008-12-04 20:12:29 +010047 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020048enum perf_hw_id {
Thomas Gleixner0793a612008-12-04 20:12:29 +010049 /*
Ingo Molnar9f66a382008-12-10 12:33:23 +010050 * Common hardware events, generalized by the kernel:
Thomas Gleixner0793a612008-12-04 20:12:29 +010051 */
Peter Zijlstraf4dbfa82009-06-11 14:06:28 +020052 PERF_COUNT_HW_CPU_CYCLES = 0,
53 PERF_COUNT_HW_INSTRUCTIONS = 1,
54 PERF_COUNT_HW_CACHE_REFERENCES = 2,
55 PERF_COUNT_HW_CACHE_MISSES = 3,
56 PERF_COUNT_HW_BRANCH_INSTRUCTIONS = 4,
57 PERF_COUNT_HW_BRANCH_MISSES = 5,
58 PERF_COUNT_HW_BUS_CYCLES = 6,
Ingo Molnar9f66a382008-12-10 12:33:23 +010059
Ingo Molnara3084442009-06-11 14:44:26 +020060 PERF_COUNT_HW_MAX, /* non-ABI */
Peter Zijlstrab8e83512009-03-19 20:26:18 +010061};
Ingo Molnar6c594c22008-12-14 12:34:15 +010062
Peter Zijlstrab8e83512009-03-19 20:26:18 +010063/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020064 * Generalized hardware cache events:
Ingo Molnar8326f442009-06-05 20:22:46 +020065 *
Peter Zijlstra8be6e8f2009-06-11 14:19:11 +020066 * { L1-D, L1-I, LLC, ITLB, DTLB, BPU } x
Ingo Molnar8326f442009-06-05 20:22:46 +020067 * { read, write, prefetch } x
68 * { accesses, misses }
69 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +020070enum perf_hw_cache_id {
Ingo Molnara3084442009-06-11 14:44:26 +020071 PERF_COUNT_HW_CACHE_L1D = 0,
72 PERF_COUNT_HW_CACHE_L1I = 1,
73 PERF_COUNT_HW_CACHE_LL = 2,
74 PERF_COUNT_HW_CACHE_DTLB = 3,
75 PERF_COUNT_HW_CACHE_ITLB = 4,
76 PERF_COUNT_HW_CACHE_BPU = 5,
Ingo Molnar8326f442009-06-05 20:22:46 +020077
Ingo Molnara3084442009-06-11 14:44:26 +020078 PERF_COUNT_HW_CACHE_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020079};
80
Peter Zijlstra1c432d82009-06-11 13:19:29 +020081enum perf_hw_cache_op_id {
Ingo Molnara3084442009-06-11 14:44:26 +020082 PERF_COUNT_HW_CACHE_OP_READ = 0,
83 PERF_COUNT_HW_CACHE_OP_WRITE = 1,
84 PERF_COUNT_HW_CACHE_OP_PREFETCH = 2,
Ingo Molnar8326f442009-06-05 20:22:46 +020085
Ingo Molnara3084442009-06-11 14:44:26 +020086 PERF_COUNT_HW_CACHE_OP_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020087};
88
Peter Zijlstra1c432d82009-06-11 13:19:29 +020089enum perf_hw_cache_op_result_id {
90 PERF_COUNT_HW_CACHE_RESULT_ACCESS = 0,
91 PERF_COUNT_HW_CACHE_RESULT_MISS = 1,
Ingo Molnar8326f442009-06-05 20:22:46 +020092
Ingo Molnara3084442009-06-11 14:44:26 +020093 PERF_COUNT_HW_CACHE_RESULT_MAX, /* non-ABI */
Ingo Molnar8326f442009-06-05 20:22:46 +020094};
95
96/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +020097 * Special "software" events provided by the kernel, even if the hardware
98 * does not support performance events. These events measure various
Peter Zijlstrab8e83512009-03-19 20:26:18 +010099 * physical and sw events of the kernel (and allow the profiling of them as
100 * well):
101 */
Peter Zijlstra1c432d82009-06-11 13:19:29 +0200102enum perf_sw_ids {
Ingo Molnara3084442009-06-11 14:44:26 +0200103 PERF_COUNT_SW_CPU_CLOCK = 0,
104 PERF_COUNT_SW_TASK_CLOCK = 1,
105 PERF_COUNT_SW_PAGE_FAULTS = 2,
106 PERF_COUNT_SW_CONTEXT_SWITCHES = 3,
107 PERF_COUNT_SW_CPU_MIGRATIONS = 4,
108 PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
109 PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
Anton Blanchardf7d79862009-10-18 01:09:29 +0000110 PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
111 PERF_COUNT_SW_EMULATION_FAULTS = 8,
Ingo Molnar6c594c22008-12-14 12:34:15 +0100112
Ingo Molnara3084442009-06-11 14:44:26 +0200113 PERF_COUNT_SW_MAX, /* non-ABI */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100114};
115
Ingo Molnar9f66a382008-12-10 12:33:23 +0100116/*
Peter Zijlstra0d486962009-06-02 19:22:16 +0200117 * Bits that can be set in attr.sample_type to request information
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200118 * in the overflow packets.
119 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200120enum perf_event_sample_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200121 PERF_SAMPLE_IP = 1U << 0,
122 PERF_SAMPLE_TID = 1U << 1,
123 PERF_SAMPLE_TIME = 1U << 2,
124 PERF_SAMPLE_ADDR = 1U << 3,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200125 PERF_SAMPLE_READ = 1U << 4,
Ingo Molnara3084442009-06-11 14:44:26 +0200126 PERF_SAMPLE_CALLCHAIN = 1U << 5,
127 PERF_SAMPLE_ID = 1U << 6,
128 PERF_SAMPLE_CPU = 1U << 7,
129 PERF_SAMPLE_PERIOD = 1U << 8,
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200130 PERF_SAMPLE_STREAM_ID = 1U << 9,
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200131 PERF_SAMPLE_RAW = 1U << 10,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200132
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200133 PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200134};
135
136/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200137 * The format of the data returned by read() on a perf event fd,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200138 * as specified by attr.read_format:
139 *
140 * struct read_format {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200141 * { u64 value;
142 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
143 * { u64 time_running; } && PERF_FORMAT_RUNNING
144 * { u64 id; } && PERF_FORMAT_ID
145 * } && !PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200146 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200147 * { u64 nr;
148 * { u64 time_enabled; } && PERF_FORMAT_ENABLED
149 * { u64 time_running; } && PERF_FORMAT_RUNNING
150 * { u64 value;
151 * { u64 id; } && PERF_FORMAT_ID
152 * } cntr[nr];
153 * } && PERF_FORMAT_GROUP
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200154 * };
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100155 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200156enum perf_event_read_format {
Ingo Molnara3084442009-06-11 14:44:26 +0200157 PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0,
158 PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1,
159 PERF_FORMAT_ID = 1U << 2,
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200160 PERF_FORMAT_GROUP = 1U << 3,
Peter Zijlstra974802e2009-06-12 12:46:55 +0200161
Ingo Molnar57c0c152009-09-21 12:20:38 +0200162 PERF_FORMAT_MAX = 1U << 4, /* non-ABI */
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100163};
164
Peter Zijlstra974802e2009-06-12 12:46:55 +0200165#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
166
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100167/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200168 * Hardware event_id to monitor via a performance monitoring event:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100169 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200170struct perf_event_attr {
Peter Zijlstra974802e2009-06-12 12:46:55 +0200171
Peter Zijlstraf4a2deb42009-03-23 18:22:06 +0100172 /*
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200173 * Major type: hardware/software/tracepoint/etc.
174 */
175 __u32 type;
Peter Zijlstra974802e2009-06-12 12:46:55 +0200176
177 /*
178 * Size of the attr structure, for fwd/bwd compat.
179 */
180 __u32 size;
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200181
182 /*
183 * Type specific configuration information.
Peter Zijlstraf4a2deb42009-03-23 18:22:06 +0100184 */
185 __u64 config;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100186
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200187 union {
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200188 __u64 sample_period;
189 __u64 sample_freq;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200190 };
191
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200192 __u64 sample_type;
193 __u64 read_format;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100194
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100195 __u64 disabled : 1, /* off by default */
Paul Mackerras0475f9e2009-02-11 14:35:35 +1100196 inherit : 1, /* children inherit it */
197 pinned : 1, /* must always be on PMU */
198 exclusive : 1, /* only group on PMU */
199 exclude_user : 1, /* don't count user */
200 exclude_kernel : 1, /* ditto kernel */
201 exclude_hv : 1, /* ditto hypervisor */
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100202 exclude_idle : 1, /* don't count when idle */
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200203 mmap : 1, /* include mmap data */
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200204 comm : 1, /* include comm data */
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200205 freq : 1, /* use freq, not period */
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200206 inherit_stat : 1, /* per task counts */
Paul Mackerras57e79862009-06-30 16:07:19 +1000207 enable_on_exec : 1, /* next exec enables */
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200208 task : 1, /* trace fork/exit */
Peter Zijlstra2667de82009-09-17 19:01:10 +0200209 watermark : 1, /* wakeup_watermark */
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100210
Peter Zijlstra2667de82009-09-17 19:01:10 +0200211 __reserved_1 : 49;
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100212
Peter Zijlstra2667de82009-09-17 19:01:10 +0200213 union {
214 __u32 wakeup_events; /* wakeup every n events */
215 __u32 wakeup_watermark; /* bytes before wakeup */
216 };
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200217
Frederic Weisbecker189f2022009-12-03 23:16:07 +0100218 struct { /* Hardware breakpoint info */
219 __u64 bp_addr;
220 __u32 bp_type;
221 __u32 bp_len;
222 __u64 __bp_reserved_1;
223 __u64 __bp_reserved_2;
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200224 };
225
Peter Zijlstra974802e2009-06-12 12:46:55 +0200226 __u32 __reserved_2;
Ingo Molnar9f66a382008-12-10 12:33:23 +0100227
Peter Zijlstra974802e2009-06-12 12:46:55 +0200228 __u64 __reserved_3;
Thomas Gleixnereab656a2008-12-08 19:26:59 +0100229};
230
Ingo Molnar9f66a382008-12-10 12:33:23 +0100231/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200232 * Ioctls that can be done on a perf event fd:
Paul Mackerrasd859e292009-01-17 18:10:22 +1100233 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200234#define PERF_EVENT_IOC_ENABLE _IO ('$', 0)
Ingo Molnar57c0c152009-09-21 12:20:38 +0200235#define PERF_EVENT_IOC_DISABLE _IO ('$', 1)
236#define PERF_EVENT_IOC_REFRESH _IO ('$', 2)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200237#define PERF_EVENT_IOC_RESET _IO ('$', 3)
Arjan van de Ven4c49b122009-11-13 21:47:33 -0800238#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200239#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
Li Zefan6fb29152009-10-15 11:21:42 +0800240#define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200241
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200242enum perf_event_ioc_flags {
Peter Zijlstra3df5eda2009-05-08 18:52:22 +0200243 PERF_IOC_FLAG_GROUP = 1U << 0,
244};
Paul Mackerrasd859e292009-01-17 18:10:22 +1100245
Paul Mackerras37d81822009-03-23 18:22:08 +0100246/*
247 * Structure of the page that can be mapped via mmap
248 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200249struct perf_event_mmap_page {
Paul Mackerras37d81822009-03-23 18:22:08 +0100250 __u32 version; /* version number of this structure */
251 __u32 compat_version; /* lowest version this is compat with */
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200252
253 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200254 * Bits needed to read the hw events in user-space.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200255 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200256 * u32 seq;
257 * s64 count;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200258 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200259 * do {
260 * seq = pc->lock;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200261 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200262 * barrier()
263 * if (pc->index) {
264 * count = pmc_read(pc->index - 1);
265 * count += pc->offset;
266 * } else
267 * goto regular_read;
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200268 *
Peter Zijlstraa2e87d02009-04-06 11:44:59 +0200269 * barrier();
270 * } while (pc->lock != seq);
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200271 *
Peter Zijlstra92f22a32009-04-02 11:12:04 +0200272 * NOTE: for obvious reason this only works on self-monitoring
273 * processes.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200274 */
Paul Mackerras37d81822009-03-23 18:22:08 +0100275 __u32 lock; /* seqlock for synchronization */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200276 __u32 index; /* hardware event identifier */
277 __s64 offset; /* add to hardware event value */
278 __u64 time_enabled; /* time event active */
279 __u64 time_running; /* time event on cpu */
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100280
Peter Zijlstra41f95332009-06-23 17:55:18 +0200281 /*
282 * Hole for extension of the self monitor capabilities
283 */
284
Peter Zijlstra7f8b4e42009-06-22 14:34:35 +0200285 __u64 __reserved[123]; /* align to 1k */
Peter Zijlstra41f95332009-06-23 17:55:18 +0200286
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200287 /*
288 * Control data for the mmap() data buffer.
289 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100290 * User-space reading the @data_head value should issue an rmb(), on
291 * SMP capable platforms, after reading this value -- see
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200292 * perf_event_wakeup().
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100293 *
294 * When the mapping is PROT_WRITE the @data_tail value should be
295 * written by userspace to reflect the last read data. In this case
296 * the kernel will not over-write unread data.
Peter Zijlstra38ff6672009-03-30 19:07:03 +0200297 */
Peter Zijlstra8e3747c2009-06-02 16:16:02 +0200298 __u64 data_head; /* head in the data section */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100299 __u64 data_tail; /* user-space written tail */
Paul Mackerras37d81822009-03-23 18:22:08 +0100300};
301
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200302#define PERF_RECORD_MISC_CPUMODE_MASK (3 << 0)
303#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
304#define PERF_RECORD_MISC_KERNEL (1 << 0)
305#define PERF_RECORD_MISC_USER (2 << 0)
306#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200307
Peter Zijlstra5c148192009-03-25 12:30:23 +0100308struct perf_event_header {
309 __u32 type;
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200310 __u16 misc;
311 __u16 size;
Peter Zijlstra5c148192009-03-25 12:30:23 +0100312};
313
314enum perf_event_type {
Peter Zijlstra5ed00412009-03-30 19:07:12 +0200315
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200316 /*
317 * The MMAP events record the PROT_EXEC mappings so that we can
318 * correlate userspace IPs to code. They have the following structure:
319 *
320 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200321 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200322 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200323 * u32 pid, tid;
324 * u64 addr;
325 * u64 len;
326 * u64 pgoff;
327 * char filename[];
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200328 * };
329 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200330 PERF_RECORD_MMAP = 1,
Peter Zijlstraea5d20c2009-03-25 12:30:25 +0100331
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200332 /*
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200333 * struct {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200334 * struct perf_event_header header;
335 * u64 id;
336 * u64 lost;
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100337 * };
338 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200339 PERF_RECORD_LOST = 2,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100340
341 /*
342 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200343 * struct perf_event_header header;
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200344 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200345 * u32 pid, tid;
346 * char comm[];
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200347 * };
348 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200349 PERF_RECORD_COMM = 3,
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200350
351 /*
Peter Zijlstra26b119b2009-05-20 12:21:20 +0200352 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200353 * struct perf_event_header header;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200354 * u32 pid, ppid;
355 * u32 tid, ptid;
Arjan van de Ven393b2ad2009-09-12 07:52:47 +0200356 * u64 time;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200357 * };
358 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200359 PERF_RECORD_EXIT = 4,
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200360
361 /*
362 * struct {
363 * struct perf_event_header header;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200364 * u64 time;
Peter Zijlstra689802b2009-06-05 15:05:43 +0200365 * u64 id;
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200366 * u64 stream_id;
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200367 * };
368 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200369 PERF_RECORD_THROTTLE = 5,
370 PERF_RECORD_UNTHROTTLE = 6,
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200371
372 /*
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200373 * struct {
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200374 * struct perf_event_header header;
375 * u32 pid, ppid;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200376 * u32 tid, ptid;
Anton Blancharda6f10a22009-09-22 22:34:24 +1000377 * u64 time;
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200378 * };
379 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200380 PERF_RECORD_FORK = 7,
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200381
382 /*
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200383 * struct {
384 * struct perf_event_header header;
385 * u32 pid, tid;
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200386 *
387 * struct read_format values;
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200388 * };
389 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200390 PERF_RECORD_READ = 8,
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200391
392 /*
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200393 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200394 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200395 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100396 * { u64 ip; } && PERF_SAMPLE_IP
397 * { u32 pid, tid; } && PERF_SAMPLE_TID
398 * { u64 time; } && PERF_SAMPLE_TIME
399 * { u64 addr; } && PERF_SAMPLE_ADDR
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200400 * { u64 id; } && PERF_SAMPLE_ID
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200401 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100402 * { u32 cpu, res; } && PERF_SAMPLE_CPU
Ingo Molnar57c0c152009-09-21 12:20:38 +0200403 * { u64 period; } && PERF_SAMPLE_PERIOD
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200404 *
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200405 * { struct read_format values; } && PERF_SAMPLE_READ
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200406 *
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200407 * { u64 nr,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100408 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200409 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200410 * #
411 * # The RAW record below is opaque data wrt the ABI
412 * #
413 * # That is, the ABI doesn't make any promises wrt to
414 * # the stability of its content, it may vary depending
415 * # on event, hardware, kernel version and phase of
416 * # the moon.
417 * #
418 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
419 * #
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200420 *
Peter Zijlstraa0445602009-08-10 11:16:52 +0200421 * { u32 size;
422 * char data[size];}&& PERF_SAMPLE_RAW
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200423 * };
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200424 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200425 PERF_RECORD_SAMPLE = 9,
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200426
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200427 PERF_RECORD_MAX, /* non-ABI */
Peter Zijlstra5c148192009-03-25 12:30:23 +0100428};
429
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200430enum perf_callchain_context {
431 PERF_CONTEXT_HV = (__u64)-32,
432 PERF_CONTEXT_KERNEL = (__u64)-128,
433 PERF_CONTEXT_USER = (__u64)-512,
Ingo Molnar75220602009-06-18 08:00:17 +0200434
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200435 PERF_CONTEXT_GUEST = (__u64)-2048,
436 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
437 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
438
439 PERF_CONTEXT_MAX = (__u64)-4095,
Ingo Molnar75220602009-06-18 08:00:17 +0200440};
441
Peter Zijlstraa4be7c22009-08-19 11:18:27 +0200442#define PERF_FLAG_FD_NO_GROUP (1U << 0)
443#define PERF_FLAG_FD_OUTPUT (1U << 1)
444
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100445#ifdef __KERNEL__
Paul Mackerrasd859e292009-01-17 18:10:22 +1100446/*
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100447 * Kernel-internal data types and definitions:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100448 */
449
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200450#ifdef CONFIG_PERF_EVENTS
451# include <asm/perf_event.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100452#endif
453
454#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 Zijlstra3c446b3d2009-04-06 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 Zijlstra2667de82009-09-17 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
Frederic Weisbecker97eaf532009-10-18 15:33:50 +0200568typedef void (*perf_callback_t)(struct perf_event *, void *);
569
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100570struct perf_sample_data;
571
Ingo Molnar6a930702008-12-11 15:17:03 +0100572/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200573 * struct perf_event - performance event kernel representation:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100574 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200575struct perf_event {
576#ifdef CONFIG_PERF_EVENTS
Ingo Molnar65abc862009-09-21 10:18:27 +0200577 struct list_head group_entry;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100578 struct list_head event_entry;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100579 struct list_head sibling_list;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200580 int nr_siblings;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200581 struct perf_event *group_leader;
582 struct perf_event *output;
Robert Richter4aeb0b42009-04-29 12:47:03 +0200583 const struct pmu *pmu;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100584
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200585 enum perf_event_active_state state;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100586 atomic64_t count;
Ingo Molnaree060942008-12-13 09:00:03 +0100587
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100588 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200589 * These are the total time in nanoseconds that the event
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100590 * has been enabled (i.e. eligible to run, and the task has
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200591 * been scheduled in, if this is a per-task event)
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100592 * and running (scheduled onto the CPU), respectively.
593 *
594 * They are computed from tstamp_enabled, tstamp_running and
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200595 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100596 */
597 u64 total_time_enabled;
598 u64 total_time_running;
599
600 /*
601 * These are timestamps used for computing total_time_enabled
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200602 * and total_time_running when the event is in INACTIVE or
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100603 * ACTIVE state, measured in nanoseconds from an arbitrary point
604 * in time.
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200605 * tstamp_enabled: the notional time when the event was enabled
606 * tstamp_running: the notional time when the event was scheduled on
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100607 * tstamp_stopped: in INACTIVE state, the notional time when the
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200608 * event was scheduled off.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100609 */
610 u64 tstamp_enabled;
611 u64 tstamp_running;
612 u64 tstamp_stopped;
613
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200614 struct perf_event_attr attr;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200615 struct hw_perf_event hw;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100616
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200617 struct perf_event_context *ctx;
Ingo Molnar9b51f662008-12-12 13:49:45 +0100618 struct file *filp;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100619
620 /*
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100621 * These accumulate total time (in nanoseconds) that children
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200622 * events have been enabled and running, respectively.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100623 */
624 atomic64_t child_total_time_enabled;
625 atomic64_t child_total_time_running;
626
627 /*
Paul Mackerrasd859e292009-01-17 18:10:22 +1100628 * Protect attach/detach and child_list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100629 */
Peter Zijlstrafccc7142009-05-23 18:28:56 +0200630 struct mutex child_mutex;
631 struct list_head child_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200632 struct perf_event *parent;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100633
634 int oncpu;
635 int cpu;
636
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200637 struct list_head owner_entry;
638 struct task_struct *owner;
639
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100640 /* mmap bits */
641 struct mutex mmap_mutex;
642 atomic_t mmap_count;
643 struct perf_mmap_data *data;
Paul Mackerras37d81822009-03-23 18:22:08 +0100644
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100645 /* poll related */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100646 wait_queue_head_t waitq;
Peter Zijlstra3c446b3d2009-04-06 11:45:01 +0200647 struct fasync_struct *fasync;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200648
649 /* delayed work for NMIs and such */
650 int pending_wakeup;
Peter Zijlstra4c9e2542009-04-06 11:45:09 +0200651 int pending_kill;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200652 int pending_disable;
Peter Zijlstra671dec52009-04-06 11:45:02 +0200653 struct perf_pending_entry pending;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100654
Peter Zijlstra79f14642009-04-06 11:45:07 +0200655 atomic_t event_limit;
656
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200657 void (*destroy)(struct perf_event *);
Peter Zijlstra592903c2009-03-13 12:21:36 +0100658 struct rcu_head rcu_head;
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200659
660 struct pid_namespace *ns;
Peter Zijlstra8e5799b2009-06-02 15:08:15 +0200661 u64 id;
Li Zefan6fb29152009-10-15 11:21:42 +0800662
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100663 void (*overflow_handler)(struct perf_event *event,
664 int nmi, struct perf_sample_data *data,
665 struct pt_regs *regs);
666
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
Frederic Weisbecker97eaf532009-10-18 15:33:50 +0200671 perf_callback_t callback;
672
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200673 perf_callback_t event_callback;
674
Li Zefan6fb29152009-10-15 11:21:42 +0800675#endif /* CONFIG_PERF_EVENTS */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100676};
677
678/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200679 * struct perf_event_context - event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100680 *
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200681 * Used as a container for task events and CPU events as well:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100682 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200683struct perf_event_context {
Thomas Gleixner0793a612008-12-04 20:12:29 +0100684 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200685 * Protect the states of the events in the list,
Paul Mackerrasd859e292009-01-17 18:10:22 +1100686 * nr_active, and the list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100687 */
Ingo Molnara3084442009-06-11 14:44:26 +0200688 spinlock_t lock;
Paul Mackerrasd859e292009-01-17 18:10:22 +1100689 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200690 * Protect the list of events. Locking either mutex or lock
Paul Mackerrasd859e292009-01-17 18:10:22 +1100691 * is sufficient to ensure the list doesn't change; to change
692 * the list you need to lock both the mutex and the spinlock.
693 */
Ingo Molnara3084442009-06-11 14:44:26 +0200694 struct mutex mutex;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100695
Ingo Molnar65abc862009-09-21 10:18:27 +0200696 struct list_head group_list;
Ingo Molnara3084442009-06-11 14:44:26 +0200697 struct list_head event_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200698 int nr_events;
Ingo Molnara3084442009-06-11 14:44:26 +0200699 int nr_active;
700 int is_active;
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200701 int nr_stat;
Ingo Molnara3084442009-06-11 14:44:26 +0200702 atomic_t refcount;
703 struct task_struct *task;
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100704
705 /*
Peter Zijlstra4af49982009-04-06 11:45:10 +0200706 * Context clock, runs when context enabled.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100707 */
Ingo Molnara3084442009-06-11 14:44:26 +0200708 u64 time;
709 u64 timestamp;
Paul Mackerras564c2b22009-05-22 14:27:22 +1000710
711 /*
712 * These fields let us detect when two contexts have both
713 * been cloned (inherited) from a common ancestor.
714 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200715 struct perf_event_context *parent_ctx;
Ingo Molnara3084442009-06-11 14:44:26 +0200716 u64 parent_gen;
717 u64 generation;
718 int pin_count;
719 struct rcu_head rcu_head;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100720};
721
722/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200723 * struct perf_event_cpu_context - per cpu event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100724 */
725struct perf_cpu_context {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200726 struct perf_event_context ctx;
727 struct perf_event_context *task_ctx;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100728 int active_oncpu;
729 int max_pertask;
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100730 int exclusive;
Peter Zijlstra96f6d442009-03-23 18:22:07 +0100731
732 /*
733 * Recursion avoidance:
734 *
735 * task, softirq, irq, nmi context
736 */
Ingo Molnar22a4f652009-06-01 10:13:37 +0200737 int recursion[4];
Thomas Gleixner0793a612008-12-04 20:12:29 +0100738};
739
Markus Metzger5622f292009-09-15 13:00:23 +0200740struct perf_output_handle {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200741 struct perf_event *event;
742 struct perf_mmap_data *data;
743 unsigned long head;
744 unsigned long offset;
745 int nmi;
746 int sample;
747 int locked;
Markus Metzger5622f292009-09-15 13:00:23 +0200748};
749
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200750#ifdef CONFIG_PERF_EVENTS
Robert Richter829b42d2009-04-29 12:46:59 +0200751
Thomas Gleixner0793a612008-12-04 20:12:29 +0100752/*
753 * Set by architecture code:
754 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200755extern int perf_max_events;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100756
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200757extern const struct pmu *hw_perf_event_init(struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100758
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200759extern void perf_event_task_sched_in(struct task_struct *task, int cpu);
760extern void perf_event_task_sched_out(struct task_struct *task,
Paul Mackerras564c2b22009-05-22 14:27:22 +1000761 struct task_struct *next, int cpu);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200762extern void perf_event_task_tick(struct task_struct *task, int cpu);
763extern int perf_event_init_task(struct task_struct *child);
764extern void perf_event_exit_task(struct task_struct *child);
765extern void perf_event_free_task(struct task_struct *task);
766extern void set_perf_event_pending(void);
767extern void perf_event_do_pending(void);
768extern void perf_event_print_debug(void);
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200769extern void __perf_disable(void);
770extern bool __perf_enable(void);
771extern void perf_disable(void);
772extern void perf_enable(void);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200773extern int perf_event_task_disable(void);
774extern int perf_event_task_enable(void);
775extern int hw_perf_group_sched_in(struct perf_event *group_leader,
Paul Mackerras3cbed422009-01-09 16:43:42 +1100776 struct perf_cpu_context *cpuctx,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200777 struct perf_event_context *ctx, int cpu);
778extern void perf_event_update_userpage(struct perf_event *event);
Arjan van de Venfb0459d2009-09-25 12:25:56 +0200779extern int perf_event_release_kernel(struct perf_event *event);
780extern struct perf_event *
781perf_event_create_kernel_counter(struct perf_event_attr *attr,
782 int cpu,
Frederic Weisbecker97eaf532009-10-18 15:33:50 +0200783 pid_t pid,
784 perf_callback_t callback);
Peter Zijlstra59ed4462009-11-20 22:19:55 +0100785extern u64 perf_event_read_value(struct perf_event *event,
786 u64 *enabled, u64 *running);
Ingo Molnar5c92d122008-12-11 13:21:10 +0100787
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200788struct perf_sample_data {
Markus Metzger5622f292009-09-15 13:00:23 +0200789 u64 type;
790
791 u64 ip;
792 struct {
793 u32 pid;
794 u32 tid;
795 } tid_entry;
796 u64 time;
Ingo Molnara3084442009-06-11 14:44:26 +0200797 u64 addr;
Markus Metzger5622f292009-09-15 13:00:23 +0200798 u64 id;
799 u64 stream_id;
800 struct {
801 u32 cpu;
802 u32 reserved;
803 } cpu_entry;
Ingo Molnara3084442009-06-11 14:44:26 +0200804 u64 period;
Markus Metzger5622f292009-09-15 13:00:23 +0200805 struct perf_callchain_entry *callchain;
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200806 struct perf_raw_record *raw;
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200807};
808
Markus Metzger5622f292009-09-15 13:00:23 +0200809extern void perf_output_sample(struct perf_output_handle *handle,
810 struct perf_event_header *header,
811 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200812 struct perf_event *event);
Markus Metzger5622f292009-09-15 13:00:23 +0200813extern void perf_prepare_sample(struct perf_event_header *header,
814 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200815 struct perf_event *event,
Markus Metzger5622f292009-09-15 13:00:23 +0200816 struct pt_regs *regs);
817
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200818extern int perf_event_overflow(struct perf_event *event, int nmi,
Markus Metzger5622f292009-09-15 13:00:23 +0200819 struct perf_sample_data *data,
820 struct pt_regs *regs);
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200821
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100822/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200823 * Return 1 for a software event, 0 for a hardware event
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100824 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200825static inline int is_software_event(struct perf_event *event)
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100826{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200827 return (event->attr.type != PERF_TYPE_RAW) &&
828 (event->attr.type != PERF_TYPE_HARDWARE) &&
829 (event->attr.type != PERF_TYPE_HW_CACHE);
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100830}
831
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200832extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200833
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200834extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200835
836static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200837perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200838{
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200839 if (atomic_read(&perf_swevent_enabled[event_id]))
840 __perf_sw_event(event_id, nr, nmi, regs, addr);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200841}
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100842
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200843extern void __perf_event_mmap(struct vm_area_struct *vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200844
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200845static inline void perf_event_mmap(struct vm_area_struct *vma)
Peter Zijlstra089dd792009-06-05 14:04:55 +0200846{
847 if (vma->vm_flags & VM_EXEC)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200848 __perf_event_mmap(vma);
Peter Zijlstra089dd792009-06-05 14:04:55 +0200849}
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200850
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200851extern void perf_event_comm(struct task_struct *tsk);
852extern void perf_event_fork(struct task_struct *tsk);
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200853
Peter Zijlstra394ee072009-03-30 19:07:14 +0200854extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
855
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200856extern int sysctl_perf_event_paranoid;
857extern int sysctl_perf_event_mlock;
858extern int sysctl_perf_event_sample_rate;
Peter Zijlstra1ccd1542009-04-09 10:53:45 +0200859
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200860extern void perf_event_init(void);
861extern void perf_tp_event(int event_id, u64 addr, u64 count,
Jason Baronf4b5ffc2009-08-10 16:53:02 -0400862 void *record, int entry_size);
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200863extern void perf_bp_event(struct perf_event *event, void *data);
Ingo Molnar0d905bc2009-05-04 19:13:30 +0200864
Paul Mackerras9d23a902009-05-14 21:48:08 +1000865#ifndef perf_misc_flags
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200866#define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
867 PERF_RECORD_MISC_KERNEL)
Paul Mackerras9d23a902009-05-14 21:48:08 +1000868#define perf_instruction_pointer(regs) instruction_pointer(regs)
869#endif
870
Markus Metzger5622f292009-09-15 13:00:23 +0200871extern int perf_output_begin(struct perf_output_handle *handle,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200872 struct perf_event *event, unsigned int size,
Markus Metzger5622f292009-09-15 13:00:23 +0200873 int nmi, int sample);
874extern void perf_output_end(struct perf_output_handle *handle);
875extern void perf_output_copy(struct perf_output_handle *handle,
876 const void *buf, unsigned int len);
Peter Zijlstra4ed7c922009-11-23 11:37:29 +0100877extern int perf_swevent_get_recursion_context(void);
878extern void perf_swevent_put_recursion_context(int rctx);
Thomas Gleixner0793a612008-12-04 20:12:29 +0100879#else
880static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200881perf_event_task_sched_in(struct task_struct *task, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100882static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200883perf_event_task_sched_out(struct task_struct *task,
Ingo Molnar910431c2009-05-22 12:32:15 +0200884 struct task_struct *next, int cpu) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +0100885static inline void
Ingo Molnar57c0c152009-09-21 12:20:38 +0200886perf_event_task_tick(struct task_struct *task, int cpu) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200887static inline int perf_event_init_task(struct task_struct *child) { return 0; }
888static inline void perf_event_exit_task(struct task_struct *child) { }
889static inline void perf_event_free_task(struct task_struct *task) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200890static inline void perf_event_do_pending(void) { }
891static inline void perf_event_print_debug(void) { }
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200892static inline void perf_disable(void) { }
893static inline void perf_enable(void) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +0200894static inline int perf_event_task_disable(void) { return -EINVAL; }
895static inline int perf_event_task_enable(void) { return -EINVAL; }
Peter Zijlstra15dbf272009-03-13 12:21:32 +0100896
Peter Zijlstra925d5192009-03-30 19:07:02 +0200897static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200898perf_sw_event(u32 event_id, u64 nr, int nmi,
Peter Zijlstra78f13e92009-04-08 15:01:33 +0200899 struct pt_regs *regs, u64 addr) { }
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200900static inline void
901perf_bp_event(struct perf_event *event, void *data) { }
Peter Zijlstra0a4a9392009-03-30 19:07:05 +0200902
Ingo Molnar57c0c152009-09-21 12:20:38 +0200903static inline void perf_event_mmap(struct vm_area_struct *vma) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200904static inline void perf_event_comm(struct task_struct *tsk) { }
905static inline void perf_event_fork(struct task_struct *tsk) { }
906static inline void perf_event_init(void) { }
Peter Zijlstra4ed7c922009-11-23 11:37:29 +0100907static inline int perf_swevent_get_recursion_context(void) { return -1; }
908static inline void perf_swevent_put_recursion_context(int rctx) { }
Markus Metzger5622f292009-09-15 13:00:23 +0200909
Thomas Gleixner0793a612008-12-04 20:12:29 +0100910#endif
911
Markus Metzger5622f292009-09-15 13:00:23 +0200912#define perf_output_put(handle, x) \
913 perf_output_copy((handle), &(x), sizeof(x))
914
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100915#endif /* __KERNEL__ */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200916#endif /* _LINUX_PERF_EVENT_H */