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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 Zijlstraf4a2deb42009-03-23 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 Zijlstraf4a2deb42009-03-23 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 Zijlstra2667de82009-09-17 19:01:10 +0200205 watermark : 1, /* wakeup_watermark */
Peter Zijlstraab608342010-04-08 23:03:20 +0200206 /*
207 * precise_ip:
208 *
209 * 0 - SAMPLE_IP can have arbitrary skid
210 * 1 - SAMPLE_IP must have constant skid
211 * 2 - SAMPLE_IP requested to have 0 skid
212 * 3 - SAMPLE_IP must have 0 skid
213 *
214 * See also PERF_RECORD_MISC_EXACT_IP
215 */
216 precise_ip : 2, /* skid constraint */
Eric B Munson3af9e852010-05-18 15:30:49 +0100217 mmap_data : 1, /* non-exec mmap data */
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100218
Eric B Munson3af9e852010-05-18 15:30:49 +0100219 __reserved_1 : 46;
Paul Mackerras2743a5b2009-03-04 20:36:51 +1100220
Peter Zijlstra2667de82009-09-17 19:01:10 +0200221 union {
222 __u32 wakeup_events; /* wakeup every n events */
223 __u32 wakeup_watermark; /* bytes before wakeup */
224 };
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200225
Peter Zijlstraf13c12c2009-12-15 19:43:11 +0100226 __u32 bp_type;
Mahesh Salgaonkarcd757642010-01-30 10:25:18 +0530227 __u64 bp_addr;
228 __u64 bp_len;
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
Zhang, Yanmin39447b32010-04-19 13:32:41 +0800302#define PERF_RECORD_MISC_CPUMODE_MASK (7 << 0)
Ingo Molnar184f4122010-01-27 08:39:39 +0100303#define PERF_RECORD_MISC_CPUMODE_UNKNOWN (0 << 0)
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200304#define PERF_RECORD_MISC_KERNEL (1 << 0)
305#define PERF_RECORD_MISC_USER (2 << 0)
306#define PERF_RECORD_MISC_HYPERVISOR (3 << 0)
Zhang, Yanmin39447b32010-04-19 13:32:41 +0800307#define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0)
308#define PERF_RECORD_MISC_GUEST_USER (5 << 0)
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200309
Peter Zijlstraab608342010-04-08 23:03:20 +0200310/*
311 * Indicates that the content of PERF_SAMPLE_IP points to
312 * the actual instruction that triggered the event. See also
313 * perf_event_attr::precise_ip.
314 */
315#define PERF_RECORD_MISC_EXACT_IP (1 << 14)
Peter Zijlstraef21f682010-03-03 13:12:23 +0100316/*
317 * Reserve the last bit to indicate some extended misc field
318 */
319#define PERF_RECORD_MISC_EXT_RESERVED (1 << 15)
320
Peter Zijlstra5c148192009-03-25 12:30:23 +0100321struct perf_event_header {
322 __u32 type;
Peter Zijlstra6fab0192009-04-08 15:01:26 +0200323 __u16 misc;
324 __u16 size;
Peter Zijlstra5c148192009-03-25 12:30:23 +0100325};
326
327enum perf_event_type {
Peter Zijlstra5ed00412009-03-30 19:07:12 +0200328
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200329 /*
330 * The MMAP events record the PROT_EXEC mappings so that we can
331 * correlate userspace IPs to code. They have the following structure:
332 *
333 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200334 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200335 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200336 * u32 pid, tid;
337 * u64 addr;
338 * u64 len;
339 * u64 pgoff;
340 * char filename[];
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200341 * };
342 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200343 PERF_RECORD_MMAP = 1,
Peter Zijlstraea5d20c2009-03-25 12:30:25 +0100344
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200345 /*
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200346 * struct {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200347 * struct perf_event_header header;
348 * u64 id;
349 * u64 lost;
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100350 * };
351 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200352 PERF_RECORD_LOST = 2,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100353
354 /*
355 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200356 * struct perf_event_header header;
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200357 *
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200358 * u32 pid, tid;
359 * char comm[];
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200360 * };
361 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200362 PERF_RECORD_COMM = 3,
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200363
364 /*
Peter Zijlstra26b119b2009-05-20 12:21:20 +0200365 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200366 * struct perf_event_header header;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200367 * u32 pid, ppid;
368 * u32 tid, ptid;
Arjan van de Ven393b2ad2009-09-12 07:52:47 +0200369 * u64 time;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200370 * };
371 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200372 PERF_RECORD_EXIT = 4,
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200373
374 /*
375 * struct {
376 * struct perf_event_header header;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200377 * u64 time;
Peter Zijlstra689802b2009-06-05 15:05:43 +0200378 * u64 id;
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200379 * u64 stream_id;
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200380 * };
381 */
Ingo Molnar184f4122010-01-27 08:39:39 +0100382 PERF_RECORD_THROTTLE = 5,
383 PERF_RECORD_UNTHROTTLE = 6,
Peter Zijlstraa78ac322009-05-25 17:39:05 +0200384
385 /*
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200386 * struct {
Ingo Molnara21ca2c2009-06-06 09:58:57 +0200387 * struct perf_event_header header;
388 * u32 pid, ppid;
Peter Zijlstra9f498cc2009-07-23 14:46:33 +0200389 * u32 tid, ptid;
Anton Blancharda6f10a22009-09-22 22:34:24 +1000390 * u64 time;
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200391 * };
392 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200393 PERF_RECORD_FORK = 7,
Peter Zijlstra60313eb2009-06-04 16:53:44 +0200394
395 /*
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200396 * struct {
Ingo Molnar184f4122010-01-27 08:39:39 +0100397 * struct perf_event_header header;
398 * u32 pid, tid;
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200399 *
Ingo Molnar184f4122010-01-27 08:39:39 +0100400 * struct read_format values;
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200401 * };
402 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200403 PERF_RECORD_READ = 8,
Peter Zijlstra38b200d2009-06-23 20:13:11 +0200404
405 /*
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200406 * struct {
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200407 * struct perf_event_header header;
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200408 *
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100409 * { u64 ip; } && PERF_SAMPLE_IP
410 * { u32 pid, tid; } && PERF_SAMPLE_TID
411 * { u64 time; } && PERF_SAMPLE_TIME
412 * { u64 addr; } && PERF_SAMPLE_ADDR
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200413 * { u64 id; } && PERF_SAMPLE_ID
Peter Zijlstra7f453c22009-07-21 13:19:40 +0200414 * { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100415 * { u32 cpu, res; } && PERF_SAMPLE_CPU
Ingo Molnar57c0c152009-09-21 12:20:38 +0200416 * { u64 period; } && PERF_SAMPLE_PERIOD
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200417 *
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200418 * { struct read_format values; } && PERF_SAMPLE_READ
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200419 *
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200420 * { u64 nr,
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100421 * u64 ips[nr]; } && PERF_SAMPLE_CALLCHAIN
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200422 *
Ingo Molnar57c0c152009-09-21 12:20:38 +0200423 * #
424 * # The RAW record below is opaque data wrt the ABI
425 * #
426 * # That is, the ABI doesn't make any promises wrt to
427 * # the stability of its content, it may vary depending
428 * # on event, hardware, kernel version and phase of
429 * # the moon.
430 * #
431 * # In other words, PERF_SAMPLE_RAW contents are not an ABI.
432 * #
Peter Zijlstra3dab77f2009-08-13 11:47:53 +0200433 *
Peter Zijlstraa0445602009-08-10 11:16:52 +0200434 * { u32 size;
435 * char data[size];}&& PERF_SAMPLE_RAW
Peter Zijlstra0c593b32009-04-06 11:45:08 +0200436 * };
Peter Zijlstra8a057d82009-04-02 11:11:59 +0200437 */
Ingo Molnar184f4122010-01-27 08:39:39 +0100438 PERF_RECORD_SAMPLE = 9,
Peter Zijlstrae6e18ec2009-06-25 11:27:12 +0200439
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200440 PERF_RECORD_MAX, /* non-ABI */
Peter Zijlstra5c148192009-03-25 12:30:23 +0100441};
442
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200443enum perf_callchain_context {
444 PERF_CONTEXT_HV = (__u64)-32,
445 PERF_CONTEXT_KERNEL = (__u64)-128,
446 PERF_CONTEXT_USER = (__u64)-512,
Ingo Molnar75220602009-06-18 08:00:17 +0200447
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200448 PERF_CONTEXT_GUEST = (__u64)-2048,
449 PERF_CONTEXT_GUEST_KERNEL = (__u64)-2176,
450 PERF_CONTEXT_GUEST_USER = (__u64)-2560,
451
452 PERF_CONTEXT_MAX = (__u64)-4095,
Ingo Molnar75220602009-06-18 08:00:17 +0200453};
454
Peter Zijlstraa4be7c22009-08-19 11:18:27 +0200455#define PERF_FLAG_FD_NO_GROUP (1U << 0)
456#define PERF_FLAG_FD_OUTPUT (1U << 1)
457
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100458#ifdef __KERNEL__
Paul Mackerrasd859e292009-01-17 18:10:22 +1100459/*
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100460 * Kernel-internal data types and definitions:
Ingo Molnar9f66a382008-12-10 12:33:23 +0100461 */
462
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200463#ifdef CONFIG_PERF_EVENTS
464# include <asm/perf_event.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100465#endif
466
Zhang, Yanmin39447b32010-04-19 13:32:41 +0800467struct perf_guest_info_callbacks {
468 int (*is_in_guest) (void);
469 int (*is_user_mode) (void);
470 unsigned long (*get_guest_ip) (void);
471};
472
Arnd Bergmann2ff6cfd2009-12-07 17:12:58 +0100473#ifdef CONFIG_HAVE_HW_BREAKPOINT
474#include <asm/hw_breakpoint.h>
475#endif
476
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100477#include <linux/list.h>
478#include <linux/mutex.h>
479#include <linux/rculist.h>
480#include <linux/rcupdate.h>
481#include <linux/spinlock.h>
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100482#include <linux/hrtimer.h>
Peter Zijlstra3c446b3d2009-04-06 11:45:01 +0200483#include <linux/fs.h>
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200484#include <linux/pid_namespace.h>
Peter Zijlstra906010b2009-09-21 16:08:49 +0200485#include <linux/workqueue.h>
Frederic Weisbecker5331d7b2010-03-04 21:15:56 +0100486#include <linux/ftrace.h>
Peter Zijlstra85cfabb2010-03-11 13:06:56 +0100487#include <linux/cpu.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100488#include <asm/atomic.h>
Peter Zijlstrafa588152010-05-18 10:54:20 +0200489#include <asm/local.h>
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100490
Peter Zijlstraf9188e02009-06-18 22:20:52 +0200491#define PERF_MAX_STACK_DEPTH 255
492
493struct perf_callchain_entry {
494 __u64 nr;
495 __u64 ip[PERF_MAX_STACK_DEPTH];
496};
497
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200498struct perf_raw_record {
499 u32 size;
500 void *data;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200501};
502
Peter Zijlstracaff2be2010-03-03 12:02:30 +0100503struct perf_branch_entry {
504 __u64 from;
505 __u64 to;
506 __u64 flags;
507};
508
509struct perf_branch_stack {
510 __u64 nr;
511 struct perf_branch_entry entries[0];
512};
513
Paul Mackerrasf3dfd262009-02-26 22:43:46 +1100514struct task_struct;
515
Thomas Gleixner0793a612008-12-04 20:12:29 +0100516/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200517 * struct hw_perf_event - performance event hardware details:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100518 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200519struct hw_perf_event {
520#ifdef CONFIG_PERF_EVENTS
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100521 union {
522 struct { /* hardware */
Ingo Molnara3084442009-06-11 14:44:26 +0200523 u64 config;
Stephane Eranian447a1942010-02-01 14:50:01 +0200524 u64 last_tag;
Ingo Molnara3084442009-06-11 14:44:26 +0200525 unsigned long config_base;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200526 unsigned long event_base;
Ingo Molnara3084442009-06-11 14:44:26 +0200527 int idx;
Stephane Eranian447a1942010-02-01 14:50:01 +0200528 int last_cpu;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100529 };
Soeren Sandmann721a6692009-09-15 14:33:08 +0200530 struct { /* software */
531 s64 remaining;
Ingo Molnara3084442009-06-11 14:44:26 +0200532 struct hrtimer hrtimer;
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100533 };
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200534#ifdef CONFIG_HAVE_HW_BREAKPOINT
Frederic Weisbeckerdd8b1cf2010-02-27 17:10:39 +0100535 /* breakpoint */
536 struct arch_hw_breakpoint info;
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200537#endif
Peter Zijlstrad6d020e2009-03-13 12:21:35 +0100538 };
Ingo Molnaree060942008-12-13 09:00:03 +0100539 atomic64_t prev_count;
Peter Zijlstrab23f3322009-06-02 15:13:03 +0200540 u64 sample_period;
Peter Zijlstra9e350de2009-06-10 21:34:59 +0200541 u64 last_period;
Ingo Molnaree060942008-12-13 09:00:03 +0100542 atomic64_t period_left;
Peter Zijlstra60db5e02009-05-15 15:19:28 +0200543 u64 interrupts;
Peter Zijlstra6a24ed6c2009-06-05 18:01:29 +0200544
Peter Zijlstraabd50712010-01-26 18:50:16 +0100545 u64 freq_time_stamp;
546 u64 freq_count_stamp;
Ingo Molnaree060942008-12-13 09:00:03 +0100547#endif
Thomas Gleixner0793a612008-12-04 20:12:29 +0100548};
549
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200550struct perf_event;
Ingo Molnar621a01e2008-12-11 12:46:46 +0100551
Peter Zijlstra8d2cacb2010-05-25 17:49:05 +0200552/*
553 * Common implementation detail of pmu::{start,commit,cancel}_txn
554 */
555#define PERF_EVENT_TXN 0x1
Lin Ming6bde9b62010-04-23 13:56:00 +0800556
Ingo Molnar621a01e2008-12-11 12:46:46 +0100557/**
Robert Richter4aeb0b42009-04-29 12:47:03 +0200558 * struct pmu - generic performance monitoring unit
Ingo Molnar621a01e2008-12-11 12:46:46 +0100559 */
Robert Richter4aeb0b42009-04-29 12:47:03 +0200560struct pmu {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200561 int (*enable) (struct perf_event *event);
562 void (*disable) (struct perf_event *event);
Stephane Eraniand76a0812010-02-08 17:06:01 +0200563 int (*start) (struct perf_event *event);
564 void (*stop) (struct perf_event *event);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200565 void (*read) (struct perf_event *event);
566 void (*unthrottle) (struct perf_event *event);
Lin Ming6bde9b62010-04-23 13:56:00 +0800567
568 /*
Peter Zijlstra8d2cacb2010-05-25 17:49:05 +0200569 * Group events scheduling is treated as a transaction, add group
570 * events as a whole and perform one schedulability test. If the test
571 * fails, roll back the whole group
Lin Ming6bde9b62010-04-23 13:56:00 +0800572 */
573
Peter Zijlstra8d2cacb2010-05-25 17:49:05 +0200574 /*
575 * Start the transaction, after this ->enable() doesn't need
576 * to do schedulability tests.
577 */
Lin Ming6bde9b62010-04-23 13:56:00 +0800578 void (*start_txn) (const struct pmu *pmu);
Peter Zijlstra8d2cacb2010-05-25 17:49:05 +0200579 /*
580 * If ->start_txn() disabled the ->enable() schedulability test
581 * then ->commit_txn() is required to perform one. On success
582 * the transaction is closed. On error the transaction is kept
583 * open until ->cancel_txn() is called.
584 */
Lin Ming6bde9b62010-04-23 13:56:00 +0800585 int (*commit_txn) (const struct pmu *pmu);
Peter Zijlstra8d2cacb2010-05-25 17:49:05 +0200586 /*
587 * Will cancel the transaction, assumes ->disable() is called for
588 * each successfull ->enable() during the transaction.
589 */
590 void (*cancel_txn) (const struct pmu *pmu);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100591};
592
Thomas Gleixner0793a612008-12-04 20:12:29 +0100593/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200594 * enum perf_event_active_state - the states of a event
Ingo Molnar6a930702008-12-11 15:17:03 +0100595 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200596enum perf_event_active_state {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200597 PERF_EVENT_STATE_ERROR = -2,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200598 PERF_EVENT_STATE_OFF = -1,
599 PERF_EVENT_STATE_INACTIVE = 0,
Ingo Molnar57c0c152009-09-21 12:20:38 +0200600 PERF_EVENT_STATE_ACTIVE = 1,
Ingo Molnar6a930702008-12-11 15:17:03 +0100601};
602
Ingo Molnar9b51f662008-12-12 13:49:45 +0100603struct file;
604
Peter Zijlstrad57e34f2010-05-28 19:41:35 +0200605#define PERF_BUFFER_WRITABLE 0x01
606
Peter Zijlstraca5135e2010-05-28 19:33:23 +0200607struct perf_buffer {
Peter Zijlstraac9721f2010-05-27 12:54:41 +0200608 atomic_t refcount;
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100609 struct rcu_head rcu_head;
Peter Zijlstra906010b2009-09-21 16:08:49 +0200610#ifdef CONFIG_PERF_USE_VMALLOC
611 struct work_struct work;
Peter Zijlstra3cafa9f2010-05-20 19:07:56 +0200612 int page_order; /* allocation order */
Peter Zijlstra906010b2009-09-21 16:08:49 +0200613#endif
Peter Zijlstra8740f942009-04-08 15:01:29 +0200614 int nr_pages; /* nr of data pages */
Peter Zijlstra43a21ea2009-03-25 19:39:37 +0100615 int writable; /* are we writable */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200616
Peter Zijlstrac33a0bc2009-05-01 12:23:16 +0200617 atomic_t poll; /* POLL_ for wakeups */
Peter Zijlstra8740f942009-04-08 15:01:29 +0200618
Peter Zijlstrafa588152010-05-18 10:54:20 +0200619 local_t head; /* write position */
620 local_t nest; /* nested writers */
621 local_t events; /* event limit */
Peter Zijlstraadb8e112010-05-20 16:21:55 +0200622 local_t wakeup; /* wakeup stamp */
Peter Zijlstrafa588152010-05-18 10:54:20 +0200623 local_t lost; /* nr records lost */
Peter Zijlstraef607772010-05-18 10:50:41 +0200624
Peter Zijlstra2667de82009-09-17 19:01:10 +0200625 long watermark; /* wakeup watermark */
626
Ingo Molnar57c0c152009-09-21 12:20:38 +0200627 struct perf_event_mmap_page *user_page;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200628 void *data_pages[0];
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100629};
630
Peter Zijlstra671dec52009-04-06 11:45:02 +0200631struct perf_pending_entry {
632 struct perf_pending_entry *next;
633 void (*func)(struct perf_pending_entry *);
Peter Zijlstra925d5192009-03-30 19:07:02 +0200634};
635
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100636struct perf_sample_data;
637
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100638typedef void (*perf_overflow_handler_t)(struct perf_event *, int,
639 struct perf_sample_data *,
640 struct pt_regs *regs);
641
Frederic Weisbeckerd6f962b2010-01-10 01:25:51 +0100642enum perf_group_flag {
643 PERF_GROUP_SOFTWARE = 0x1,
644};
645
Frederic Weisbecker76e1d902010-04-05 15:35:57 +0200646#define SWEVENT_HLIST_BITS 8
647#define SWEVENT_HLIST_SIZE (1 << SWEVENT_HLIST_BITS)
648
649struct swevent_hlist {
650 struct hlist_head heads[SWEVENT_HLIST_SIZE];
651 struct rcu_head rcu_head;
652};
653
Peter Zijlstra8a495422010-05-27 15:47:49 +0200654#define PERF_ATTACH_CONTEXT 0x01
655#define PERF_ATTACH_GROUP 0x02
656
Ingo Molnar6a930702008-12-11 15:17:03 +0100657/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200658 * struct perf_event - performance event kernel representation:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100659 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200660struct perf_event {
661#ifdef CONFIG_PERF_EVENTS
Ingo Molnar65abc862009-09-21 10:18:27 +0200662 struct list_head group_entry;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100663 struct list_head event_entry;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100664 struct list_head sibling_list;
Frederic Weisbecker76e1d902010-04-05 15:35:57 +0200665 struct hlist_node hlist_entry;
Ingo Molnar0127c3e2009-05-25 22:03:26 +0200666 int nr_siblings;
Frederic Weisbeckerd6f962b2010-01-10 01:25:51 +0100667 int group_flags;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200668 struct perf_event *group_leader;
Robert Richter4aeb0b42009-04-29 12:47:03 +0200669 const struct pmu *pmu;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100670
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200671 enum perf_event_active_state state;
Peter Zijlstra8a495422010-05-27 15:47:49 +0200672 unsigned int attach_state;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100673 atomic64_t count;
Ingo Molnaree060942008-12-13 09:00:03 +0100674
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100675 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200676 * These are the total time in nanoseconds that the event
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100677 * has been enabled (i.e. eligible to run, and the task has
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200678 * been scheduled in, if this is a per-task event)
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100679 * and running (scheduled onto the CPU), respectively.
680 *
681 * They are computed from tstamp_enabled, tstamp_running and
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200682 * tstamp_stopped when the event is in INACTIVE or ACTIVE state.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100683 */
684 u64 total_time_enabled;
685 u64 total_time_running;
686
687 /*
688 * These are timestamps used for computing total_time_enabled
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200689 * and total_time_running when the event is in INACTIVE or
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100690 * ACTIVE state, measured in nanoseconds from an arbitrary point
691 * in time.
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200692 * tstamp_enabled: the notional time when the event was enabled
693 * tstamp_running: the notional time when the event was scheduled on
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100694 * tstamp_stopped: in INACTIVE state, the notional time when the
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200695 * event was scheduled off.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100696 */
697 u64 tstamp_enabled;
698 u64 tstamp_running;
699 u64 tstamp_stopped;
700
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200701 struct perf_event_attr attr;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200702 struct hw_perf_event hw;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100703
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200704 struct perf_event_context *ctx;
Ingo Molnar9b51f662008-12-12 13:49:45 +0100705 struct file *filp;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100706
707 /*
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100708 * These accumulate total time (in nanoseconds) that children
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200709 * events have been enabled and running, respectively.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100710 */
711 atomic64_t child_total_time_enabled;
712 atomic64_t child_total_time_running;
713
714 /*
Paul Mackerrasd859e292009-01-17 18:10:22 +1100715 * Protect attach/detach and child_list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100716 */
Peter Zijlstrafccc7142009-05-23 18:28:56 +0200717 struct mutex child_mutex;
718 struct list_head child_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200719 struct perf_event *parent;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100720
721 int oncpu;
722 int cpu;
723
Peter Zijlstra082ff5a2009-05-23 18:29:00 +0200724 struct list_head owner_entry;
725 struct task_struct *owner;
726
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100727 /* mmap bits */
728 struct mutex mmap_mutex;
729 atomic_t mmap_count;
Peter Zijlstraac9721f2010-05-27 12:54:41 +0200730 int mmap_locked;
731 struct user_struct *mmap_user;
Peter Zijlstraca5135e2010-05-28 19:33:23 +0200732 struct perf_buffer *buffer;
Paul Mackerras37d81822009-03-23 18:22:08 +0100733
Peter Zijlstra7b732a72009-03-23 18:22:10 +0100734 /* poll related */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100735 wait_queue_head_t waitq;
Peter Zijlstra3c446b3d2009-04-06 11:45:01 +0200736 struct fasync_struct *fasync;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200737
738 /* delayed work for NMIs and such */
739 int pending_wakeup;
Peter Zijlstra4c9e2542009-04-06 11:45:09 +0200740 int pending_kill;
Peter Zijlstra79f14642009-04-06 11:45:07 +0200741 int pending_disable;
Peter Zijlstra671dec52009-04-06 11:45:02 +0200742 struct perf_pending_entry pending;
Peter Zijlstra592903c2009-03-13 12:21:36 +0100743
Peter Zijlstra79f14642009-04-06 11:45:07 +0200744 atomic_t event_limit;
745
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200746 void (*destroy)(struct perf_event *);
Peter Zijlstra592903c2009-03-13 12:21:36 +0100747 struct rcu_head rcu_head;
Peter Zijlstra709e50c2009-06-02 14:13:15 +0200748
749 struct pid_namespace *ns;
Peter Zijlstra8e5799b2009-06-02 15:08:15 +0200750 u64 id;
Li Zefan6fb29152009-10-15 11:21:42 +0800751
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100752 perf_overflow_handler_t overflow_handler;
Peter Zijlstra453f19e2009-11-20 22:19:43 +0100753
Li Zefan07b139c2009-12-21 14:27:35 +0800754#ifdef CONFIG_EVENT_TRACING
Peter Zijlstra1c024eca2010-05-19 14:02:22 +0200755 struct ftrace_event_call *tp_event;
Li Zefan6fb29152009-10-15 11:21:42 +0800756 struct event_filter *filter;
Ingo Molnaree060942008-12-13 09:00:03 +0100757#endif
Li Zefan6fb29152009-10-15 11:21:42 +0800758
759#endif /* CONFIG_PERF_EVENTS */
Thomas Gleixner0793a612008-12-04 20:12:29 +0100760};
761
762/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200763 * struct perf_event_context - event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100764 *
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200765 * Used as a container for task events and CPU events as well:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100766 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200767struct perf_event_context {
Thomas Gleixner0793a612008-12-04 20:12:29 +0100768 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200769 * Protect the states of the events in the list,
Paul Mackerrasd859e292009-01-17 18:10:22 +1100770 * nr_active, and the list:
Thomas Gleixner0793a612008-12-04 20:12:29 +0100771 */
Thomas Gleixnere625cce12009-11-17 18:02:06 +0100772 raw_spinlock_t lock;
Paul Mackerrasd859e292009-01-17 18:10:22 +1100773 /*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200774 * Protect the list of events. Locking either mutex or lock
Paul Mackerrasd859e292009-01-17 18:10:22 +1100775 * is sufficient to ensure the list doesn't change; to change
776 * the list you need to lock both the mutex and the spinlock.
777 */
Ingo Molnara3084442009-06-11 14:44:26 +0200778 struct mutex mutex;
Ingo Molnar04289bb2008-12-11 08:38:42 +0100779
Frederic Weisbecker889ff012010-01-09 20:04:47 +0100780 struct list_head pinned_groups;
781 struct list_head flexible_groups;
Ingo Molnara3084442009-06-11 14:44:26 +0200782 struct list_head event_list;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200783 int nr_events;
Ingo Molnara3084442009-06-11 14:44:26 +0200784 int nr_active;
785 int is_active;
Peter Zijlstrabfbd3382009-06-24 21:11:59 +0200786 int nr_stat;
Ingo Molnara3084442009-06-11 14:44:26 +0200787 atomic_t refcount;
788 struct task_struct *task;
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100789
790 /*
Peter Zijlstra4af49982009-04-06 11:45:10 +0200791 * Context clock, runs when context enabled.
Paul Mackerras53cfbf52009-03-25 22:46:58 +1100792 */
Ingo Molnara3084442009-06-11 14:44:26 +0200793 u64 time;
794 u64 timestamp;
Paul Mackerras564c2b22009-05-22 14:27:22 +1000795
796 /*
797 * These fields let us detect when two contexts have both
798 * been cloned (inherited) from a common ancestor.
799 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200800 struct perf_event_context *parent_ctx;
Ingo Molnara3084442009-06-11 14:44:26 +0200801 u64 parent_gen;
802 u64 generation;
803 int pin_count;
804 struct rcu_head rcu_head;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100805};
806
807/**
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200808 * struct perf_event_cpu_context - per cpu event context structure
Thomas Gleixner0793a612008-12-04 20:12:29 +0100809 */
810struct perf_cpu_context {
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200811 struct perf_event_context ctx;
812 struct perf_event_context *task_ctx;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100813 int active_oncpu;
814 int max_pertask;
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100815 int exclusive;
Frederic Weisbecker76e1d902010-04-05 15:35:57 +0200816 struct swevent_hlist *swevent_hlist;
817 struct mutex hlist_mutex;
818 int hlist_refcount;
Peter Zijlstra96f6d442009-03-23 18:22:07 +0100819
820 /*
821 * Recursion avoidance:
822 *
823 * task, softirq, irq, nmi context
824 */
Ingo Molnar22a4f652009-06-01 10:13:37 +0200825 int recursion[4];
Thomas Gleixner0793a612008-12-04 20:12:29 +0100826};
827
Markus Metzger5622f292009-09-15 13:00:23 +0200828struct perf_output_handle {
Ingo Molnar57c0c152009-09-21 12:20:38 +0200829 struct perf_event *event;
Peter Zijlstraca5135e2010-05-28 19:33:23 +0200830 struct perf_buffer *buffer;
Peter Zijlstra6d1acfd2010-05-18 11:12:48 +0200831 unsigned long wakeup;
Peter Zijlstra5d967a82010-05-20 16:46:39 +0200832 unsigned long size;
833 void *addr;
834 int page;
Ingo Molnar57c0c152009-09-21 12:20:38 +0200835 int nmi;
836 int sample;
Markus Metzger5622f292009-09-15 13:00:23 +0200837};
838
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200839#ifdef CONFIG_PERF_EVENTS
Robert Richter829b42d2009-04-29 12:46:59 +0200840
Thomas Gleixner0793a612008-12-04 20:12:29 +0100841/*
842 * Set by architecture code:
843 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200844extern int perf_max_events;
Thomas Gleixner0793a612008-12-04 20:12:29 +0100845
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200846extern const struct pmu *hw_perf_event_init(struct perf_event *event);
Ingo Molnar621a01e2008-12-11 12:46:46 +0100847
Peter Zijlstra49f47432009-12-27 11:51:52 +0100848extern void perf_event_task_sched_in(struct task_struct *task);
Ingo Molnar184f4122010-01-27 08:39:39 +0100849extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
Peter Zijlstra49f47432009-12-27 11:51:52 +0100850extern void perf_event_task_tick(struct task_struct *task);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200851extern int perf_event_init_task(struct task_struct *child);
852extern void perf_event_exit_task(struct task_struct *child);
853extern void perf_event_free_task(struct task_struct *task);
854extern void set_perf_event_pending(void);
855extern void perf_event_do_pending(void);
856extern void perf_event_print_debug(void);
Peter Zijlstra9e35ad32009-05-13 16:21:38 +0200857extern void __perf_disable(void);
858extern bool __perf_enable(void);
859extern void perf_disable(void);
860extern void perf_enable(void);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200861extern int perf_event_task_disable(void);
862extern int perf_event_task_enable(void);
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200863extern void perf_event_update_userpage(struct perf_event *event);
Arjan van de Venfb0459d2009-09-25 12:25:56 +0200864extern int perf_event_release_kernel(struct perf_event *event);
865extern struct perf_event *
866perf_event_create_kernel_counter(struct perf_event_attr *attr,
867 int cpu,
Frederic Weisbecker97eaf532009-10-18 15:33:50 +0200868 pid_t pid,
Frederic Weisbeckerb326e952009-12-05 09:44:31 +0100869 perf_overflow_handler_t callback);
Peter Zijlstra59ed4462009-11-20 22:19:55 +0100870extern u64 perf_event_read_value(struct perf_event *event,
871 u64 *enabled, u64 *running);
Ingo Molnar5c92d122008-12-11 13:21:10 +0100872
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200873struct perf_sample_data {
Markus Metzger5622f292009-09-15 13:00:23 +0200874 u64 type;
875
876 u64 ip;
877 struct {
878 u32 pid;
879 u32 tid;
880 } tid_entry;
881 u64 time;
Ingo Molnara3084442009-06-11 14:44:26 +0200882 u64 addr;
Markus Metzger5622f292009-09-15 13:00:23 +0200883 u64 id;
884 u64 stream_id;
885 struct {
886 u32 cpu;
887 u32 reserved;
888 } cpu_entry;
Ingo Molnara3084442009-06-11 14:44:26 +0200889 u64 period;
Markus Metzger5622f292009-09-15 13:00:23 +0200890 struct perf_callchain_entry *callchain;
Frederic Weisbecker3a43ce62009-08-08 04:26:37 +0200891 struct perf_raw_record *raw;
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200892};
893
Peter Zijlstradc1d6282010-03-03 15:55:04 +0100894static inline
895void perf_sample_data_init(struct perf_sample_data *data, u64 addr)
896{
897 data->addr = addr;
898 data->raw = NULL;
899}
900
Markus Metzger5622f292009-09-15 13:00:23 +0200901extern void perf_output_sample(struct perf_output_handle *handle,
902 struct perf_event_header *header,
903 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200904 struct perf_event *event);
Markus Metzger5622f292009-09-15 13:00:23 +0200905extern void perf_prepare_sample(struct perf_event_header *header,
906 struct perf_sample_data *data,
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200907 struct perf_event *event,
Markus Metzger5622f292009-09-15 13:00:23 +0200908 struct pt_regs *regs);
909
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200910extern int perf_event_overflow(struct perf_event *event, int nmi,
Markus Metzger5622f292009-09-15 13:00:23 +0200911 struct perf_sample_data *data,
912 struct pt_regs *regs);
Peter Zijlstradf1a1322009-06-10 21:02:22 +0200913
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100914/*
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200915 * Return 1 for a software event, 0 for a hardware event
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100916 */
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200917static inline int is_software_event(struct perf_event *event)
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100918{
Peter Zijlstra92b67592010-01-18 14:02:16 +0100919 switch (event->attr.type) {
920 case PERF_TYPE_SOFTWARE:
921 case PERF_TYPE_TRACEPOINT:
922 /* for now the breakpoint stuff also works as software event */
923 case PERF_TYPE_BREAKPOINT:
924 return 1;
925 }
926 return 0;
Paul Mackerras3b6f9e52009-01-14 21:00:30 +1100927}
928
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200929extern atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200930
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200931extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
Peter Zijlstraf29ac752009-06-19 18:27:26 +0200932
Frederic Weisbecker5331d7b2010-03-04 21:15:56 +0100933extern void
934perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
935
936/*
937 * Take a snapshot of the regs. Skip ip and frame pointer to
938 * the nth caller. We only need a few of the regs:
939 * - ip for PERF_SAMPLE_IP
940 * - cs for user_mode() tests
941 * - bp for callchains
942 * - eflags, for future purposes, just in case
943 */
944static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
945{
946 unsigned long ip;
947
948 memset(regs, 0, sizeof(*regs));
949
950 switch (skip) {
951 case 1 :
952 ip = CALLER_ADDR0;
953 break;
954 case 2 :
955 ip = CALLER_ADDR1;
956 break;
957 case 3 :
958 ip = CALLER_ADDR2;
959 break;
960 case 4:
961 ip = CALLER_ADDR3;
962 break;
963 /* No need to support further for now */
964 default:
965 ip = 0;
966 }
967
968 return perf_arch_fetch_caller_regs(regs, ip, skip);
969}
970
Frederic Weisbeckere49a5bd2010-03-22 19:40:03 +0100971static inline void
972perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr)
973{
974 if (atomic_read(&perf_swevent_enabled[event_id])) {
975 struct pt_regs hot_regs;
976
977 if (!regs) {
978 perf_fetch_caller_regs(&hot_regs, 1);
979 regs = &hot_regs;
980 }
981 __perf_sw_event(event_id, nr, nmi, regs, addr);
982 }
983}
984
Eric B Munson3af9e852010-05-18 15:30:49 +0100985extern void perf_event_mmap(struct vm_area_struct *vma);
Zhang, Yanmin39447b32010-04-19 13:32:41 +0800986extern struct perf_guest_info_callbacks *perf_guest_cbs;
Zhang, Yanmindcf46b92010-04-20 10:13:58 +0800987extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
988extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
Zhang, Yanmin39447b32010-04-19 13:32:41 +0800989
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200990extern void perf_event_comm(struct task_struct *tsk);
991extern void perf_event_fork(struct task_struct *tsk);
Peter Zijlstra8d1b2d92009-04-08 15:01:30 +0200992
Peter Zijlstra394ee072009-03-30 19:07:14 +0200993extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
994
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200995extern int sysctl_perf_event_paranoid;
996extern int sysctl_perf_event_mlock;
997extern int sysctl_perf_event_sample_rate;
Peter Zijlstra1ccd1542009-04-09 10:53:45 +0200998
Peter Zijlstra320ebf02010-03-02 12:35:37 +0100999static inline bool perf_paranoid_tracepoint_raw(void)
1000{
1001 return sysctl_perf_event_paranoid > -1;
1002}
1003
1004static inline bool perf_paranoid_cpu(void)
1005{
1006 return sysctl_perf_event_paranoid > 0;
1007}
1008
1009static inline bool perf_paranoid_kernel(void)
1010{
1011 return sysctl_perf_event_paranoid > 1;
1012}
1013
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001014extern void perf_event_init(void);
Peter Zijlstra1c024eca2010-05-19 14:02:22 +02001015extern void perf_tp_event(u64 addr, u64 count, void *record,
1016 int entry_size, struct pt_regs *regs,
Peter Zijlstraecc55f82010-05-21 15:11:34 +02001017 struct hlist_head *head, int rctx);
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02001018extern void perf_bp_event(struct perf_event *event, void *data);
Ingo Molnar0d905bc2009-05-04 19:13:30 +02001019
Paul Mackerras9d23a902009-05-14 21:48:08 +10001020#ifndef perf_misc_flags
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001021#define perf_misc_flags(regs) (user_mode(regs) ? PERF_RECORD_MISC_USER : \
1022 PERF_RECORD_MISC_KERNEL)
Paul Mackerras9d23a902009-05-14 21:48:08 +10001023#define perf_instruction_pointer(regs) instruction_pointer(regs)
1024#endif
1025
Markus Metzger5622f292009-09-15 13:00:23 +02001026extern int perf_output_begin(struct perf_output_handle *handle,
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001027 struct perf_event *event, unsigned int size,
Markus Metzger5622f292009-09-15 13:00:23 +02001028 int nmi, int sample);
1029extern void perf_output_end(struct perf_output_handle *handle);
1030extern void perf_output_copy(struct perf_output_handle *handle,
1031 const void *buf, unsigned int len);
Peter Zijlstra4ed7c922009-11-23 11:37:29 +01001032extern int perf_swevent_get_recursion_context(void);
1033extern void perf_swevent_put_recursion_context(int rctx);
Frederic Weisbecker44234ad2009-12-09 09:25:48 +01001034extern void perf_event_enable(struct perf_event *event);
1035extern void perf_event_disable(struct perf_event *event);
Thomas Gleixner0793a612008-12-04 20:12:29 +01001036#else
1037static inline void
Peter Zijlstra49f47432009-12-27 11:51:52 +01001038perf_event_task_sched_in(struct task_struct *task) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +01001039static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001040perf_event_task_sched_out(struct task_struct *task,
Peter Zijlstra49f47432009-12-27 11:51:52 +01001041 struct task_struct *next) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +01001042static inline void
Peter Zijlstra49f47432009-12-27 11:51:52 +01001043perf_event_task_tick(struct task_struct *task) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001044static inline int perf_event_init_task(struct task_struct *child) { return 0; }
1045static inline void perf_event_exit_task(struct task_struct *child) { }
1046static inline void perf_event_free_task(struct task_struct *task) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +02001047static inline void perf_event_do_pending(void) { }
1048static inline void perf_event_print_debug(void) { }
Peter Zijlstra9e35ad32009-05-13 16:21:38 +02001049static inline void perf_disable(void) { }
1050static inline void perf_enable(void) { }
Ingo Molnar57c0c152009-09-21 12:20:38 +02001051static inline int perf_event_task_disable(void) { return -EINVAL; }
1052static inline int perf_event_task_enable(void) { return -EINVAL; }
Peter Zijlstra15dbf272009-03-13 12:21:32 +01001053
Peter Zijlstra925d5192009-03-30 19:07:02 +02001054static inline void
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001055perf_sw_event(u32 event_id, u64 nr, int nmi,
Peter Zijlstra78f13e92009-04-08 15:01:33 +02001056 struct pt_regs *regs, u64 addr) { }
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02001057static inline void
Ingo Molnar184f4122010-01-27 08:39:39 +01001058perf_bp_event(struct perf_event *event, void *data) { }
Peter Zijlstra0a4a9392009-03-30 19:07:05 +02001059
Zhang, Yanmin39447b32010-04-19 13:32:41 +08001060static inline int perf_register_guest_info_callbacks
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08001061(struct perf_guest_info_callbacks *callbacks) { return 0; }
Zhang, Yanmin39447b32010-04-19 13:32:41 +08001062static inline int perf_unregister_guest_info_callbacks
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08001063(struct perf_guest_info_callbacks *callbacks) { return 0; }
Zhang, Yanmin39447b32010-04-19 13:32:41 +08001064
Ingo Molnar57c0c152009-09-21 12:20:38 +02001065static inline void perf_event_mmap(struct vm_area_struct *vma) { }
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001066static inline void perf_event_comm(struct task_struct *tsk) { }
1067static inline void perf_event_fork(struct task_struct *tsk) { }
1068static inline void perf_event_init(void) { }
Ingo Molnar184f4122010-01-27 08:39:39 +01001069static inline int perf_swevent_get_recursion_context(void) { return -1; }
Peter Zijlstra4ed7c922009-11-23 11:37:29 +01001070static inline void perf_swevent_put_recursion_context(int rctx) { }
Frederic Weisbecker44234ad2009-12-09 09:25:48 +01001071static inline void perf_event_enable(struct perf_event *event) { }
1072static inline void perf_event_disable(struct perf_event *event) { }
Thomas Gleixner0793a612008-12-04 20:12:29 +01001073#endif
1074
Markus Metzger5622f292009-09-15 13:00:23 +02001075#define perf_output_put(handle, x) \
1076 perf_output_copy((handle), &(x), sizeof(x))
1077
Peter Zijlstra3f6da392010-03-05 13:01:18 +01001078/*
1079 * This has to have a higher priority than migration_notifier in sched.c.
1080 */
1081#define perf_cpu_notifier(fn) \
1082do { \
1083 static struct notifier_block fn##_nb __cpuinitdata = \
1084 { .notifier_call = fn, .priority = 20 }; \
1085 fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
1086 (void *)(unsigned long)smp_processor_id()); \
1087 fn(&fn##_nb, (unsigned long)CPU_STARTING, \
1088 (void *)(unsigned long)smp_processor_id()); \
1089 fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
1090 (void *)(unsigned long)smp_processor_id()); \
1091 register_cpu_notifier(&fn##_nb); \
1092} while (0)
1093
Paul Mackerrasf3dfd262009-02-26 22:43:46 +11001094#endif /* __KERNEL__ */
Ingo Molnarcdd6c482009-09-21 12:02:48 +02001095#endif /* _LINUX_PERF_EVENT_H */