Loading...
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * auxtrace.h: AUX area trace support
4 * Copyright (c) 2013-2015, Intel Corporation.
5 */
6
7#ifndef __PERF_AUXTRACE_H
8#define __PERF_AUXTRACE_H
9
10#include <sys/types.h>
11#include <errno.h>
12#include <stdbool.h>
13#include <stddef.h>
14#include <stdio.h> // FILE
15#include <linux/list.h>
16#include <linux/perf_event.h>
17#include <linux/types.h>
18#include <asm/bitsperlong.h>
19#include <asm/barrier.h>
20
21union perf_event;
22struct perf_session;
23struct evlist;
24struct perf_tool;
25struct mmap;
26struct perf_sample;
27struct option;
28struct record_opts;
29struct perf_record_auxtrace_error;
30struct perf_record_auxtrace_info;
31struct events_stats;
32
33enum auxtrace_error_type {
34 PERF_AUXTRACE_ERROR_ITRACE = 1,
35 PERF_AUXTRACE_ERROR_MAX
36};
37
38/* Auxtrace records must have the same alignment as perf event records */
39#define PERF_AUXTRACE_RECORD_ALIGNMENT 8
40
41enum auxtrace_type {
42 PERF_AUXTRACE_UNKNOWN,
43 PERF_AUXTRACE_INTEL_PT,
44 PERF_AUXTRACE_INTEL_BTS,
45 PERF_AUXTRACE_CS_ETM,
46 PERF_AUXTRACE_ARM_SPE,
47 PERF_AUXTRACE_S390_CPUMSF,
48};
49
50enum itrace_period_type {
51 PERF_ITRACE_PERIOD_INSTRUCTIONS,
52 PERF_ITRACE_PERIOD_TICKS,
53 PERF_ITRACE_PERIOD_NANOSECS,
54};
55
56/**
57 * struct itrace_synth_opts - AUX area tracing synthesis options.
58 * @set: indicates whether or not options have been set
59 * @default_no_sample: Default to no sampling.
60 * @inject: indicates the event (not just the sample) must be fully synthesized
61 * because 'perf inject' will write it out
62 * @instructions: whether to synthesize 'instructions' events
63 * @branches: whether to synthesize 'branches' events
64 * @transactions: whether to synthesize events for transactions
65 * @ptwrites: whether to synthesize events for ptwrites
66 * @pwr_events: whether to synthesize power events
67 * @other_events: whether to synthesize other events recorded due to the use of
68 * aux_output
69 * @errors: whether to synthesize decoder error events
70 * @dont_decode: whether to skip decoding entirely
71 * @log: write a decoding log
72 * @calls: limit branch samples to calls (can be combined with @returns)
73 * @returns: limit branch samples to returns (can be combined with @calls)
74 * @callchain: add callchain to 'instructions' events
75 * @thread_stack: feed branches to the thread_stack
76 * @last_branch: add branch context to 'instruction' events
77 * @callchain_sz: maximum callchain size
78 * @last_branch_sz: branch context size
79 * @period: 'instructions' events period
80 * @period_type: 'instructions' events period type
81 * @initial_skip: skip N events at the beginning.
82 * @cpu_bitmap: CPUs for which to synthesize events, or NULL for all
83 * @ptime_range: time intervals to trace or NULL
84 * @range_num: number of time intervals to trace
85 */
86struct itrace_synth_opts {
87 bool set;
88 bool default_no_sample;
89 bool inject;
90 bool instructions;
91 bool branches;
92 bool transactions;
93 bool ptwrites;
94 bool pwr_events;
95 bool other_events;
96 bool errors;
97 bool dont_decode;
98 bool log;
99 bool calls;
100 bool returns;
101 bool callchain;
102 bool thread_stack;
103 bool last_branch;
104 unsigned int callchain_sz;
105 unsigned int last_branch_sz;
106 unsigned long long period;
107 enum itrace_period_type period_type;
108 unsigned long initial_skip;
109 unsigned long *cpu_bitmap;
110 struct perf_time_interval *ptime_range;
111 int range_num;
112};
113
114/**
115 * struct auxtrace_index_entry - indexes a AUX area tracing event within a
116 * perf.data file.
117 * @file_offset: offset within the perf.data file
118 * @sz: size of the event
119 */
120struct auxtrace_index_entry {
121 u64 file_offset;
122 u64 sz;
123};
124
125#define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
126
127/**
128 * struct auxtrace_index - index of AUX area tracing events within a perf.data
129 * file.
130 * @list: linking a number of arrays of entries
131 * @nr: number of entries
132 * @entries: array of entries
133 */
134struct auxtrace_index {
135 struct list_head list;
136 size_t nr;
137 struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
138};
139
140/**
141 * struct auxtrace - session callbacks to allow AUX area data decoding.
142 * @process_event: lets the decoder see all session events
143 * @process_auxtrace_event: process a PERF_RECORD_AUXTRACE event
144 * @flush_events: process any remaining data
145 * @free_events: free resources associated with event processing
146 * @free: free resources associated with the session
147 */
148struct auxtrace {
149 int (*process_event)(struct perf_session *session,
150 union perf_event *event,
151 struct perf_sample *sample,
152 struct perf_tool *tool);
153 int (*process_auxtrace_event)(struct perf_session *session,
154 union perf_event *event,
155 struct perf_tool *tool);
156 int (*flush_events)(struct perf_session *session,
157 struct perf_tool *tool);
158 void (*free_events)(struct perf_session *session);
159 void (*free)(struct perf_session *session);
160};
161
162/**
163 * struct auxtrace_buffer - a buffer containing AUX area tracing data.
164 * @list: buffers are queued in a list held by struct auxtrace_queue
165 * @size: size of the buffer in bytes
166 * @pid: in per-thread mode, the pid this buffer is associated with
167 * @tid: in per-thread mode, the tid this buffer is associated with
168 * @cpu: in per-cpu mode, the cpu this buffer is associated with
169 * @data: actual buffer data (can be null if the data has not been loaded)
170 * @data_offset: file offset at which the buffer can be read
171 * @mmap_addr: mmap address at which the buffer can be read
172 * @mmap_size: size of the mmap at @mmap_addr
173 * @data_needs_freeing: @data was malloc'd so free it when it is no longer
174 * needed
175 * @consecutive: the original data was split up and this buffer is consecutive
176 * to the previous buffer
177 * @offset: offset as determined by aux_head / aux_tail members of struct
178 * perf_event_mmap_page
179 * @reference: an implementation-specific reference determined when the data is
180 * recorded
181 * @buffer_nr: used to number each buffer
182 * @use_size: implementation actually only uses this number of bytes
183 * @use_data: implementation actually only uses data starting at this address
184 */
185struct auxtrace_buffer {
186 struct list_head list;
187 size_t size;
188 pid_t pid;
189 pid_t tid;
190 int cpu;
191 void *data;
192 off_t data_offset;
193 void *mmap_addr;
194 size_t mmap_size;
195 bool data_needs_freeing;
196 bool consecutive;
197 u64 offset;
198 u64 reference;
199 u64 buffer_nr;
200 size_t use_size;
201 void *use_data;
202};
203
204/**
205 * struct auxtrace_queue - a queue of AUX area tracing data buffers.
206 * @head: head of buffer list
207 * @tid: in per-thread mode, the tid this queue is associated with
208 * @cpu: in per-cpu mode, the cpu this queue is associated with
209 * @set: %true once this queue has been dedicated to a specific thread or cpu
210 * @priv: implementation-specific data
211 */
212struct auxtrace_queue {
213 struct list_head head;
214 pid_t tid;
215 int cpu;
216 bool set;
217 void *priv;
218};
219
220/**
221 * struct auxtrace_queues - an array of AUX area tracing queues.
222 * @queue_array: array of queues
223 * @nr_queues: number of queues
224 * @new_data: set whenever new data is queued
225 * @populated: queues have been fully populated using the auxtrace_index
226 * @next_buffer_nr: used to number each buffer
227 */
228struct auxtrace_queues {
229 struct auxtrace_queue *queue_array;
230 unsigned int nr_queues;
231 bool new_data;
232 bool populated;
233 u64 next_buffer_nr;
234};
235
236/**
237 * struct auxtrace_heap_item - element of struct auxtrace_heap.
238 * @queue_nr: queue number
239 * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
240 * to be a timestamp
241 */
242struct auxtrace_heap_item {
243 unsigned int queue_nr;
244 u64 ordinal;
245};
246
247/**
248 * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
249 * @heap_array: the heap
250 * @heap_cnt: the number of elements in the heap
251 * @heap_sz: maximum number of elements (grows as needed)
252 */
253struct auxtrace_heap {
254 struct auxtrace_heap_item *heap_array;
255 unsigned int heap_cnt;
256 unsigned int heap_sz;
257};
258
259/**
260 * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
261 * @base: address of mapped area
262 * @userpg: pointer to buffer's perf_event_mmap_page
263 * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
264 * @len: size of mapped area
265 * @prev: previous aux_head
266 * @idx: index of this mmap
267 * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
268 * mmap) otherwise %0
269 * @cpu: cpu number for a per-cpu mmap otherwise %-1
270 */
271struct auxtrace_mmap {
272 void *base;
273 void *userpg;
274 size_t mask;
275 size_t len;
276 u64 prev;
277 int idx;
278 pid_t tid;
279 int cpu;
280};
281
282/**
283 * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
284 * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
285 * @offset: file offset of mapped area
286 * @len: size of mapped area
287 * @prot: mmap memory protection
288 * @idx: index of this mmap
289 * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
290 * mmap) otherwise %0
291 * @cpu: cpu number for a per-cpu mmap otherwise %-1
292 */
293struct auxtrace_mmap_params {
294 size_t mask;
295 off_t offset;
296 size_t len;
297 int prot;
298 int idx;
299 pid_t tid;
300 int cpu;
301};
302
303/**
304 * struct auxtrace_record - callbacks for recording AUX area data.
305 * @recording_options: validate and process recording options
306 * @info_priv_size: return the size of the private data in auxtrace_info_event
307 * @info_fill: fill-in the private data in auxtrace_info_event
308 * @free: free this auxtrace record structure
309 * @snapshot_start: starting a snapshot
310 * @snapshot_finish: finishing a snapshot
311 * @find_snapshot: find data to snapshot within auxtrace mmap
312 * @parse_snapshot_options: parse snapshot options
313 * @reference: provide a 64-bit reference number for auxtrace_event
314 * @read_finish: called after reading from an auxtrace mmap
315 * @alignment: alignment (if any) for AUX area data
316 */
317struct auxtrace_record {
318 int (*recording_options)(struct auxtrace_record *itr,
319 struct evlist *evlist,
320 struct record_opts *opts);
321 size_t (*info_priv_size)(struct auxtrace_record *itr,
322 struct evlist *evlist);
323 int (*info_fill)(struct auxtrace_record *itr,
324 struct perf_session *session,
325 struct perf_record_auxtrace_info *auxtrace_info,
326 size_t priv_size);
327 void (*free)(struct auxtrace_record *itr);
328 int (*snapshot_start)(struct auxtrace_record *itr);
329 int (*snapshot_finish)(struct auxtrace_record *itr);
330 int (*find_snapshot)(struct auxtrace_record *itr, int idx,
331 struct auxtrace_mmap *mm, unsigned char *data,
332 u64 *head, u64 *old);
333 int (*parse_snapshot_options)(struct auxtrace_record *itr,
334 struct record_opts *opts,
335 const char *str);
336 u64 (*reference)(struct auxtrace_record *itr);
337 int (*read_finish)(struct auxtrace_record *itr, int idx);
338 unsigned int alignment;
339};
340
341/**
342 * struct addr_filter - address filter.
343 * @list: list node
344 * @range: true if it is a range filter
345 * @start: true if action is 'filter' or 'start'
346 * @action: 'filter', 'start' or 'stop' ('tracestop' is accepted but converted
347 * to 'stop')
348 * @sym_from: symbol name for the filter address
349 * @sym_to: symbol name that determines the filter size
350 * @sym_from_idx: selects n'th from symbols with the same name (0 means global
351 * and less than 0 means symbol must be unique)
352 * @sym_to_idx: same as @sym_from_idx but for @sym_to
353 * @addr: filter address
354 * @size: filter region size (for range filters)
355 * @filename: DSO file name or NULL for the kernel
356 * @str: allocated string that contains the other string members
357 */
358struct addr_filter {
359 struct list_head list;
360 bool range;
361 bool start;
362 const char *action;
363 const char *sym_from;
364 const char *sym_to;
365 int sym_from_idx;
366 int sym_to_idx;
367 u64 addr;
368 u64 size;
369 const char *filename;
370 char *str;
371};
372
373/**
374 * struct addr_filters - list of address filters.
375 * @head: list of address filters
376 * @cnt: number of address filters
377 */
378struct addr_filters {
379 struct list_head head;
380 int cnt;
381};
382
383struct auxtrace_cache;
384
385#ifdef HAVE_AUXTRACE_SUPPORT
386
387/*
388 * In snapshot mode the mmapped page is read-only which makes using
389 * __sync_val_compare_and_swap() problematic. However, snapshot mode expects
390 * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
391 * the event) so there is not a race anyway.
392 */
393static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
394{
395 struct perf_event_mmap_page *pc = mm->userpg;
396 u64 head = READ_ONCE(pc->aux_head);
397
398 /* Ensure all reads are done after we read the head */
399 rmb();
400 return head;
401}
402
403static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
404{
405 struct perf_event_mmap_page *pc = mm->userpg;
406#if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
407 u64 head = READ_ONCE(pc->aux_head);
408#else
409 u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
410#endif
411
412 /* Ensure all reads are done after we read the head */
413 rmb();
414 return head;
415}
416
417static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
418{
419 struct perf_event_mmap_page *pc = mm->userpg;
420#if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
421 u64 old_tail;
422#endif
423
424 /* Ensure all reads are done before we write the tail out */
425 mb();
426#if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
427 pc->aux_tail = tail;
428#else
429 do {
430 old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
431 } while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
432#endif
433}
434
435int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
436 struct auxtrace_mmap_params *mp,
437 void *userpg, int fd);
438void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
439void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
440 off_t auxtrace_offset,
441 unsigned int auxtrace_pages,
442 bool auxtrace_overwrite);
443void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
444 struct evlist *evlist, int idx,
445 bool per_cpu);
446
447typedef int (*process_auxtrace_t)(struct perf_tool *tool,
448 struct mmap *map,
449 union perf_event *event, void *data1,
450 size_t len1, void *data2, size_t len2);
451
452int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
453 struct perf_tool *tool, process_auxtrace_t fn);
454
455int auxtrace_mmap__read_snapshot(struct mmap *map,
456 struct auxtrace_record *itr,
457 struct perf_tool *tool, process_auxtrace_t fn,
458 size_t snapshot_size);
459
460int auxtrace_queues__init(struct auxtrace_queues *queues);
461int auxtrace_queues__add_event(struct auxtrace_queues *queues,
462 struct perf_session *session,
463 union perf_event *event, off_t data_offset,
464 struct auxtrace_buffer **buffer_ptr);
465void auxtrace_queues__free(struct auxtrace_queues *queues);
466int auxtrace_queues__process_index(struct auxtrace_queues *queues,
467 struct perf_session *session);
468struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
469 struct auxtrace_buffer *buffer);
470void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
471void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
472void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
473void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
474
475int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
476 u64 ordinal);
477void auxtrace_heap__pop(struct auxtrace_heap *heap);
478void auxtrace_heap__free(struct auxtrace_heap *heap);
479
480struct auxtrace_cache_entry {
481 struct hlist_node hash;
482 u32 key;
483};
484
485struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
486 unsigned int limit_percent);
487void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
488void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
489void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
490int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
491 struct auxtrace_cache_entry *entry);
492void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
493
494struct auxtrace_record *auxtrace_record__init(struct evlist *evlist,
495 int *err);
496
497int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
498 struct record_opts *opts,
499 const char *str);
500int auxtrace_record__options(struct auxtrace_record *itr,
501 struct evlist *evlist,
502 struct record_opts *opts);
503size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
504 struct evlist *evlist);
505int auxtrace_record__info_fill(struct auxtrace_record *itr,
506 struct perf_session *session,
507 struct perf_record_auxtrace_info *auxtrace_info,
508 size_t priv_size);
509void auxtrace_record__free(struct auxtrace_record *itr);
510int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
511int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit);
512int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
513 struct auxtrace_mmap *mm,
514 unsigned char *data, u64 *head, u64 *old);
515u64 auxtrace_record__reference(struct auxtrace_record *itr);
516
517int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
518 off_t file_offset);
519int auxtrace_index__write(int fd, struct list_head *head);
520int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
521 bool needs_swap);
522void auxtrace_index__free(struct list_head *head);
523
524void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
525 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
526 const char *msg, u64 timestamp);
527
528int perf_event__process_auxtrace_info(struct perf_session *session,
529 union perf_event *event);
530s64 perf_event__process_auxtrace(struct perf_session *session,
531 union perf_event *event);
532int perf_event__process_auxtrace_error(struct perf_session *session,
533 union perf_event *event);
534int itrace_parse_synth_opts(const struct option *opt, const char *str,
535 int unset);
536void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts,
537 bool no_sample);
538
539size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
540void perf_session__auxtrace_error_inc(struct perf_session *session,
541 union perf_event *event);
542void events_stats__auxtrace_error_warn(const struct events_stats *stats);
543
544void addr_filters__init(struct addr_filters *filts);
545void addr_filters__exit(struct addr_filters *filts);
546int addr_filters__parse_bare_filter(struct addr_filters *filts,
547 const char *filter);
548int auxtrace_parse_filters(struct evlist *evlist);
549
550int auxtrace__process_event(struct perf_session *session, union perf_event *event,
551 struct perf_sample *sample, struct perf_tool *tool);
552int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool);
553void auxtrace__free_events(struct perf_session *session);
554void auxtrace__free(struct perf_session *session);
555
556#define ITRACE_HELP \
557" i: synthesize instructions events\n" \
558" b: synthesize branches events\n" \
559" c: synthesize branches events (calls only)\n" \
560" r: synthesize branches events (returns only)\n" \
561" x: synthesize transactions events\n" \
562" w: synthesize ptwrite events\n" \
563" p: synthesize power events\n" \
564" e: synthesize error events\n" \
565" d: create a debug log\n" \
566" g[len]: synthesize a call chain (use with i or x)\n" \
567" l[len]: synthesize last branch entries (use with i or x)\n" \
568" sNUMBER: skip initial number of events\n" \
569" PERIOD[ns|us|ms|i|t]: specify period to sample stream\n" \
570" concatenate multiple options. Default is ibxwpe or cewp\n"
571
572static inline
573void itrace_synth_opts__set_time_range(struct itrace_synth_opts *opts,
574 struct perf_time_interval *ptime_range,
575 int range_num)
576{
577 opts->ptime_range = ptime_range;
578 opts->range_num = range_num;
579}
580
581static inline
582void itrace_synth_opts__clear_time_range(struct itrace_synth_opts *opts)
583{
584 opts->ptime_range = NULL;
585 opts->range_num = 0;
586}
587
588#else
589#include "debug.h"
590
591static inline struct auxtrace_record *
592auxtrace_record__init(struct evlist *evlist __maybe_unused,
593 int *err)
594{
595 *err = 0;
596 return NULL;
597}
598
599static inline
600void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
601{
602}
603
604static inline
605int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
606 struct evlist *evlist __maybe_unused,
607 struct record_opts *opts __maybe_unused)
608{
609 return 0;
610}
611
612#define perf_event__process_auxtrace_info 0
613#define perf_event__process_auxtrace 0
614#define perf_event__process_auxtrace_error 0
615
616static inline
617void perf_session__auxtrace_error_inc(struct perf_session *session
618 __maybe_unused,
619 union perf_event *event
620 __maybe_unused)
621{
622}
623
624static inline
625void events_stats__auxtrace_error_warn(const struct events_stats *stats
626 __maybe_unused)
627{
628}
629
630static inline
631int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
632 const char *str __maybe_unused,
633 int unset __maybe_unused)
634{
635 pr_err("AUX area tracing not supported\n");
636 return -EINVAL;
637}
638
639static inline
640int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
641 struct record_opts *opts __maybe_unused,
642 const char *str)
643{
644 if (!str)
645 return 0;
646 pr_err("AUX area tracing not supported\n");
647 return -EINVAL;
648}
649
650static inline
651int auxtrace__process_event(struct perf_session *session __maybe_unused,
652 union perf_event *event __maybe_unused,
653 struct perf_sample *sample __maybe_unused,
654 struct perf_tool *tool __maybe_unused)
655{
656 return 0;
657}
658
659static inline
660int auxtrace__flush_events(struct perf_session *session __maybe_unused,
661 struct perf_tool *tool __maybe_unused)
662{
663 return 0;
664}
665
666static inline
667void auxtrace__free_events(struct perf_session *session __maybe_unused)
668{
669}
670
671static inline
672void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
673{
674}
675
676static inline
677void auxtrace__free(struct perf_session *session __maybe_unused)
678{
679}
680
681static inline
682int auxtrace_index__write(int fd __maybe_unused,
683 struct list_head *head __maybe_unused)
684{
685 return -EINVAL;
686}
687
688static inline
689int auxtrace_index__process(int fd __maybe_unused,
690 u64 size __maybe_unused,
691 struct perf_session *session __maybe_unused,
692 bool needs_swap __maybe_unused)
693{
694 return -EINVAL;
695}
696
697static inline
698void auxtrace_index__free(struct list_head *head __maybe_unused)
699{
700}
701
702static inline
703int auxtrace_parse_filters(struct evlist *evlist __maybe_unused)
704{
705 return 0;
706}
707
708int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
709 struct auxtrace_mmap_params *mp,
710 void *userpg, int fd);
711void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
712void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
713 off_t auxtrace_offset,
714 unsigned int auxtrace_pages,
715 bool auxtrace_overwrite);
716void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
717 struct evlist *evlist, int idx,
718 bool per_cpu);
719
720#define ITRACE_HELP ""
721
722static inline
723void itrace_synth_opts__set_time_range(struct itrace_synth_opts *opts
724 __maybe_unused,
725 struct perf_time_interval *ptime_range
726 __maybe_unused,
727 int range_num __maybe_unused)
728{
729}
730
731static inline
732void itrace_synth_opts__clear_time_range(struct itrace_synth_opts *opts
733 __maybe_unused)
734{
735}
736
737#endif
738
739#endif
1/*
2 * auxtrace.h: AUX area trace support
3 * Copyright (c) 2013-2015, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 */
15
16#ifndef __PERF_AUXTRACE_H
17#define __PERF_AUXTRACE_H
18
19#include <sys/types.h>
20#include <stdbool.h>
21#include <stddef.h>
22#include <linux/list.h>
23#include <linux/perf_event.h>
24#include <linux/types.h>
25
26#include "../perf.h"
27#include "event.h"
28#include "session.h"
29#include "debug.h"
30
31union perf_event;
32struct perf_session;
33struct perf_evlist;
34struct perf_tool;
35struct option;
36struct record_opts;
37struct auxtrace_info_event;
38struct events_stats;
39
40enum auxtrace_type {
41 PERF_AUXTRACE_UNKNOWN,
42 PERF_AUXTRACE_INTEL_PT,
43 PERF_AUXTRACE_INTEL_BTS,
44 PERF_AUXTRACE_CS_ETM,
45};
46
47enum itrace_period_type {
48 PERF_ITRACE_PERIOD_INSTRUCTIONS,
49 PERF_ITRACE_PERIOD_TICKS,
50 PERF_ITRACE_PERIOD_NANOSECS,
51};
52
53/**
54 * struct itrace_synth_opts - AUX area tracing synthesis options.
55 * @set: indicates whether or not options have been set
56 * @inject: indicates the event (not just the sample) must be fully synthesized
57 * because 'perf inject' will write it out
58 * @instructions: whether to synthesize 'instructions' events
59 * @branches: whether to synthesize 'branches' events
60 * @transactions: whether to synthesize events for transactions
61 * @errors: whether to synthesize decoder error events
62 * @dont_decode: whether to skip decoding entirely
63 * @log: write a decoding log
64 * @calls: limit branch samples to calls (can be combined with @returns)
65 * @returns: limit branch samples to returns (can be combined with @calls)
66 * @callchain: add callchain to 'instructions' events
67 * @thread_stack: feed branches to the thread_stack
68 * @last_branch: add branch context to 'instruction' events
69 * @callchain_sz: maximum callchain size
70 * @last_branch_sz: branch context size
71 * @period: 'instructions' events period
72 * @period_type: 'instructions' events period type
73 * @initial_skip: skip N events at the beginning.
74 */
75struct itrace_synth_opts {
76 bool set;
77 bool inject;
78 bool instructions;
79 bool branches;
80 bool transactions;
81 bool errors;
82 bool dont_decode;
83 bool log;
84 bool calls;
85 bool returns;
86 bool callchain;
87 bool thread_stack;
88 bool last_branch;
89 unsigned int callchain_sz;
90 unsigned int last_branch_sz;
91 unsigned long long period;
92 enum itrace_period_type period_type;
93 unsigned long initial_skip;
94};
95
96/**
97 * struct auxtrace_index_entry - indexes a AUX area tracing event within a
98 * perf.data file.
99 * @file_offset: offset within the perf.data file
100 * @sz: size of the event
101 */
102struct auxtrace_index_entry {
103 u64 file_offset;
104 u64 sz;
105};
106
107#define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
108
109/**
110 * struct auxtrace_index - index of AUX area tracing events within a perf.data
111 * file.
112 * @list: linking a number of arrays of entries
113 * @nr: number of entries
114 * @entries: array of entries
115 */
116struct auxtrace_index {
117 struct list_head list;
118 size_t nr;
119 struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
120};
121
122/**
123 * struct auxtrace - session callbacks to allow AUX area data decoding.
124 * @process_event: lets the decoder see all session events
125 * @flush_events: process any remaining data
126 * @free_events: free resources associated with event processing
127 * @free: free resources associated with the session
128 */
129struct auxtrace {
130 int (*process_event)(struct perf_session *session,
131 union perf_event *event,
132 struct perf_sample *sample,
133 struct perf_tool *tool);
134 int (*process_auxtrace_event)(struct perf_session *session,
135 union perf_event *event,
136 struct perf_tool *tool);
137 int (*flush_events)(struct perf_session *session,
138 struct perf_tool *tool);
139 void (*free_events)(struct perf_session *session);
140 void (*free)(struct perf_session *session);
141};
142
143/**
144 * struct auxtrace_buffer - a buffer containing AUX area tracing data.
145 * @list: buffers are queued in a list held by struct auxtrace_queue
146 * @size: size of the buffer in bytes
147 * @pid: in per-thread mode, the pid this buffer is associated with
148 * @tid: in per-thread mode, the tid this buffer is associated with
149 * @cpu: in per-cpu mode, the cpu this buffer is associated with
150 * @data: actual buffer data (can be null if the data has not been loaded)
151 * @data_offset: file offset at which the buffer can be read
152 * @mmap_addr: mmap address at which the buffer can be read
153 * @mmap_size: size of the mmap at @mmap_addr
154 * @data_needs_freeing: @data was malloc'd so free it when it is no longer
155 * needed
156 * @consecutive: the original data was split up and this buffer is consecutive
157 * to the previous buffer
158 * @offset: offset as determined by aux_head / aux_tail members of struct
159 * perf_event_mmap_page
160 * @reference: an implementation-specific reference determined when the data is
161 * recorded
162 * @buffer_nr: used to number each buffer
163 * @use_size: implementation actually only uses this number of bytes
164 * @use_data: implementation actually only uses data starting at this address
165 */
166struct auxtrace_buffer {
167 struct list_head list;
168 size_t size;
169 pid_t pid;
170 pid_t tid;
171 int cpu;
172 void *data;
173 off_t data_offset;
174 void *mmap_addr;
175 size_t mmap_size;
176 bool data_needs_freeing;
177 bool consecutive;
178 u64 offset;
179 u64 reference;
180 u64 buffer_nr;
181 size_t use_size;
182 void *use_data;
183};
184
185/**
186 * struct auxtrace_queue - a queue of AUX area tracing data buffers.
187 * @head: head of buffer list
188 * @tid: in per-thread mode, the tid this queue is associated with
189 * @cpu: in per-cpu mode, the cpu this queue is associated with
190 * @set: %true once this queue has been dedicated to a specific thread or cpu
191 * @priv: implementation-specific data
192 */
193struct auxtrace_queue {
194 struct list_head head;
195 pid_t tid;
196 int cpu;
197 bool set;
198 void *priv;
199};
200
201/**
202 * struct auxtrace_queues - an array of AUX area tracing queues.
203 * @queue_array: array of queues
204 * @nr_queues: number of queues
205 * @new_data: set whenever new data is queued
206 * @populated: queues have been fully populated using the auxtrace_index
207 * @next_buffer_nr: used to number each buffer
208 */
209struct auxtrace_queues {
210 struct auxtrace_queue *queue_array;
211 unsigned int nr_queues;
212 bool new_data;
213 bool populated;
214 u64 next_buffer_nr;
215};
216
217/**
218 * struct auxtrace_heap_item - element of struct auxtrace_heap.
219 * @queue_nr: queue number
220 * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
221 * to be a timestamp
222 */
223struct auxtrace_heap_item {
224 unsigned int queue_nr;
225 u64 ordinal;
226};
227
228/**
229 * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
230 * @heap_array: the heap
231 * @heap_cnt: the number of elements in the heap
232 * @heap_sz: maximum number of elements (grows as needed)
233 */
234struct auxtrace_heap {
235 struct auxtrace_heap_item *heap_array;
236 unsigned int heap_cnt;
237 unsigned int heap_sz;
238};
239
240/**
241 * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
242 * @base: address of mapped area
243 * @userpg: pointer to buffer's perf_event_mmap_page
244 * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
245 * @len: size of mapped area
246 * @prev: previous aux_head
247 * @idx: index of this mmap
248 * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
249 * mmap) otherwise %0
250 * @cpu: cpu number for a per-cpu mmap otherwise %-1
251 */
252struct auxtrace_mmap {
253 void *base;
254 void *userpg;
255 size_t mask;
256 size_t len;
257 u64 prev;
258 int idx;
259 pid_t tid;
260 int cpu;
261};
262
263/**
264 * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
265 * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
266 * @offset: file offset of mapped area
267 * @len: size of mapped area
268 * @prot: mmap memory protection
269 * @idx: index of this mmap
270 * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
271 * mmap) otherwise %0
272 * @cpu: cpu number for a per-cpu mmap otherwise %-1
273 */
274struct auxtrace_mmap_params {
275 size_t mask;
276 off_t offset;
277 size_t len;
278 int prot;
279 int idx;
280 pid_t tid;
281 int cpu;
282};
283
284/**
285 * struct auxtrace_record - callbacks for recording AUX area data.
286 * @recording_options: validate and process recording options
287 * @info_priv_size: return the size of the private data in auxtrace_info_event
288 * @info_fill: fill-in the private data in auxtrace_info_event
289 * @free: free this auxtrace record structure
290 * @snapshot_start: starting a snapshot
291 * @snapshot_finish: finishing a snapshot
292 * @find_snapshot: find data to snapshot within auxtrace mmap
293 * @parse_snapshot_options: parse snapshot options
294 * @reference: provide a 64-bit reference number for auxtrace_event
295 * @read_finish: called after reading from an auxtrace mmap
296 */
297struct auxtrace_record {
298 int (*recording_options)(struct auxtrace_record *itr,
299 struct perf_evlist *evlist,
300 struct record_opts *opts);
301 size_t (*info_priv_size)(struct auxtrace_record *itr,
302 struct perf_evlist *evlist);
303 int (*info_fill)(struct auxtrace_record *itr,
304 struct perf_session *session,
305 struct auxtrace_info_event *auxtrace_info,
306 size_t priv_size);
307 void (*free)(struct auxtrace_record *itr);
308 int (*snapshot_start)(struct auxtrace_record *itr);
309 int (*snapshot_finish)(struct auxtrace_record *itr);
310 int (*find_snapshot)(struct auxtrace_record *itr, int idx,
311 struct auxtrace_mmap *mm, unsigned char *data,
312 u64 *head, u64 *old);
313 int (*parse_snapshot_options)(struct auxtrace_record *itr,
314 struct record_opts *opts,
315 const char *str);
316 u64 (*reference)(struct auxtrace_record *itr);
317 int (*read_finish)(struct auxtrace_record *itr, int idx);
318 unsigned int alignment;
319};
320
321/**
322 * struct addr_filter - address filter.
323 * @list: list node
324 * @range: true if it is a range filter
325 * @start: true if action is 'filter' or 'start'
326 * @action: 'filter', 'start' or 'stop' ('tracestop' is accepted but converted
327 * to 'stop')
328 * @sym_from: symbol name for the filter address
329 * @sym_to: symbol name that determines the filter size
330 * @sym_from_idx: selects n'th from symbols with the same name (0 means global
331 * and less than 0 means symbol must be unique)
332 * @sym_to_idx: same as @sym_from_idx but for @sym_to
333 * @addr: filter address
334 * @size: filter region size (for range filters)
335 * @filename: DSO file name or NULL for the kernel
336 * @str: allocated string that contains the other string members
337 */
338struct addr_filter {
339 struct list_head list;
340 bool range;
341 bool start;
342 const char *action;
343 const char *sym_from;
344 const char *sym_to;
345 int sym_from_idx;
346 int sym_to_idx;
347 u64 addr;
348 u64 size;
349 const char *filename;
350 char *str;
351};
352
353/**
354 * struct addr_filters - list of address filters.
355 * @head: list of address filters
356 * @cnt: number of address filters
357 */
358struct addr_filters {
359 struct list_head head;
360 int cnt;
361};
362
363#ifdef HAVE_AUXTRACE_SUPPORT
364
365/*
366 * In snapshot mode the mmapped page is read-only which makes using
367 * __sync_val_compare_and_swap() problematic. However, snapshot mode expects
368 * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
369 * the event) so there is not a race anyway.
370 */
371static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
372{
373 struct perf_event_mmap_page *pc = mm->userpg;
374 u64 head = ACCESS_ONCE(pc->aux_head);
375
376 /* Ensure all reads are done after we read the head */
377 rmb();
378 return head;
379}
380
381static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
382{
383 struct perf_event_mmap_page *pc = mm->userpg;
384#if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
385 u64 head = ACCESS_ONCE(pc->aux_head);
386#else
387 u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
388#endif
389
390 /* Ensure all reads are done after we read the head */
391 rmb();
392 return head;
393}
394
395static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
396{
397 struct perf_event_mmap_page *pc = mm->userpg;
398#if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
399 u64 old_tail;
400#endif
401
402 /* Ensure all reads are done before we write the tail out */
403 mb();
404#if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
405 pc->aux_tail = tail;
406#else
407 do {
408 old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
409 } while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
410#endif
411}
412
413int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
414 struct auxtrace_mmap_params *mp,
415 void *userpg, int fd);
416void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
417void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
418 off_t auxtrace_offset,
419 unsigned int auxtrace_pages,
420 bool auxtrace_overwrite);
421void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
422 struct perf_evlist *evlist, int idx,
423 bool per_cpu);
424
425typedef int (*process_auxtrace_t)(struct perf_tool *tool,
426 union perf_event *event, void *data1,
427 size_t len1, void *data2, size_t len2);
428
429int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
430 struct perf_tool *tool, process_auxtrace_t fn);
431
432int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
433 struct auxtrace_record *itr,
434 struct perf_tool *tool, process_auxtrace_t fn,
435 size_t snapshot_size);
436
437int auxtrace_queues__init(struct auxtrace_queues *queues);
438int auxtrace_queues__add_event(struct auxtrace_queues *queues,
439 struct perf_session *session,
440 union perf_event *event, off_t data_offset,
441 struct auxtrace_buffer **buffer_ptr);
442void auxtrace_queues__free(struct auxtrace_queues *queues);
443int auxtrace_queues__process_index(struct auxtrace_queues *queues,
444 struct perf_session *session);
445struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
446 struct auxtrace_buffer *buffer);
447void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
448void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
449void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
450void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
451
452int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
453 u64 ordinal);
454void auxtrace_heap__pop(struct auxtrace_heap *heap);
455void auxtrace_heap__free(struct auxtrace_heap *heap);
456
457struct auxtrace_cache_entry {
458 struct hlist_node hash;
459 u32 key;
460};
461
462struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
463 unsigned int limit_percent);
464void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
465void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
466void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
467int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
468 struct auxtrace_cache_entry *entry);
469void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
470
471struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
472 int *err);
473
474int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
475 struct record_opts *opts,
476 const char *str);
477int auxtrace_record__options(struct auxtrace_record *itr,
478 struct perf_evlist *evlist,
479 struct record_opts *opts);
480size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
481 struct perf_evlist *evlist);
482int auxtrace_record__info_fill(struct auxtrace_record *itr,
483 struct perf_session *session,
484 struct auxtrace_info_event *auxtrace_info,
485 size_t priv_size);
486void auxtrace_record__free(struct auxtrace_record *itr);
487int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
488int auxtrace_record__snapshot_finish(struct auxtrace_record *itr);
489int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
490 struct auxtrace_mmap *mm,
491 unsigned char *data, u64 *head, u64 *old);
492u64 auxtrace_record__reference(struct auxtrace_record *itr);
493
494int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
495 off_t file_offset);
496int auxtrace_index__write(int fd, struct list_head *head);
497int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
498 bool needs_swap);
499void auxtrace_index__free(struct list_head *head);
500
501void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
502 int code, int cpu, pid_t pid, pid_t tid, u64 ip,
503 const char *msg);
504
505int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
506 struct perf_tool *tool,
507 struct perf_session *session,
508 perf_event__handler_t process);
509int perf_event__process_auxtrace_info(struct perf_tool *tool,
510 union perf_event *event,
511 struct perf_session *session);
512s64 perf_event__process_auxtrace(struct perf_tool *tool,
513 union perf_event *event,
514 struct perf_session *session);
515int perf_event__process_auxtrace_error(struct perf_tool *tool,
516 union perf_event *event,
517 struct perf_session *session);
518int itrace_parse_synth_opts(const struct option *opt, const char *str,
519 int unset);
520void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
521
522size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
523void perf_session__auxtrace_error_inc(struct perf_session *session,
524 union perf_event *event);
525void events_stats__auxtrace_error_warn(const struct events_stats *stats);
526
527void addr_filters__init(struct addr_filters *filts);
528void addr_filters__exit(struct addr_filters *filts);
529int addr_filters__parse_bare_filter(struct addr_filters *filts,
530 const char *filter);
531int auxtrace_parse_filters(struct perf_evlist *evlist);
532
533static inline int auxtrace__process_event(struct perf_session *session,
534 union perf_event *event,
535 struct perf_sample *sample,
536 struct perf_tool *tool)
537{
538 if (!session->auxtrace)
539 return 0;
540
541 return session->auxtrace->process_event(session, event, sample, tool);
542}
543
544static inline int auxtrace__flush_events(struct perf_session *session,
545 struct perf_tool *tool)
546{
547 if (!session->auxtrace)
548 return 0;
549
550 return session->auxtrace->flush_events(session, tool);
551}
552
553static inline void auxtrace__free_events(struct perf_session *session)
554{
555 if (!session->auxtrace)
556 return;
557
558 return session->auxtrace->free_events(session);
559}
560
561static inline void auxtrace__free(struct perf_session *session)
562{
563 if (!session->auxtrace)
564 return;
565
566 return session->auxtrace->free(session);
567}
568
569#else
570
571static inline struct auxtrace_record *
572auxtrace_record__init(struct perf_evlist *evlist __maybe_unused,
573 int *err)
574{
575 *err = 0;
576 return NULL;
577}
578
579static inline
580void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
581{
582}
583
584static inline int
585perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
586 struct perf_tool *tool __maybe_unused,
587 struct perf_session *session __maybe_unused,
588 perf_event__handler_t process __maybe_unused)
589{
590 return -EINVAL;
591}
592
593static inline
594int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
595 struct perf_evlist *evlist __maybe_unused,
596 struct record_opts *opts __maybe_unused)
597{
598 return 0;
599}
600
601#define perf_event__process_auxtrace_info 0
602#define perf_event__process_auxtrace 0
603#define perf_event__process_auxtrace_error 0
604
605static inline
606void perf_session__auxtrace_error_inc(struct perf_session *session
607 __maybe_unused,
608 union perf_event *event
609 __maybe_unused)
610{
611}
612
613static inline
614void events_stats__auxtrace_error_warn(const struct events_stats *stats
615 __maybe_unused)
616{
617}
618
619static inline
620int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
621 const char *str __maybe_unused,
622 int unset __maybe_unused)
623{
624 pr_err("AUX area tracing not supported\n");
625 return -EINVAL;
626}
627
628static inline
629int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
630 struct record_opts *opts __maybe_unused,
631 const char *str)
632{
633 if (!str)
634 return 0;
635 pr_err("AUX area tracing not supported\n");
636 return -EINVAL;
637}
638
639static inline
640int auxtrace__process_event(struct perf_session *session __maybe_unused,
641 union perf_event *event __maybe_unused,
642 struct perf_sample *sample __maybe_unused,
643 struct perf_tool *tool __maybe_unused)
644{
645 return 0;
646}
647
648static inline
649int auxtrace__flush_events(struct perf_session *session __maybe_unused,
650 struct perf_tool *tool __maybe_unused)
651{
652 return 0;
653}
654
655static inline
656void auxtrace__free_events(struct perf_session *session __maybe_unused)
657{
658}
659
660static inline
661void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
662{
663}
664
665static inline
666void auxtrace__free(struct perf_session *session __maybe_unused)
667{
668}
669
670static inline
671int auxtrace_index__write(int fd __maybe_unused,
672 struct list_head *head __maybe_unused)
673{
674 return -EINVAL;
675}
676
677static inline
678int auxtrace_index__process(int fd __maybe_unused,
679 u64 size __maybe_unused,
680 struct perf_session *session __maybe_unused,
681 bool needs_swap __maybe_unused)
682{
683 return -EINVAL;
684}
685
686static inline
687void auxtrace_index__free(struct list_head *head __maybe_unused)
688{
689}
690
691static inline
692int auxtrace_parse_filters(struct perf_evlist *evlist __maybe_unused)
693{
694 return 0;
695}
696
697int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
698 struct auxtrace_mmap_params *mp,
699 void *userpg, int fd);
700void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
701void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
702 off_t auxtrace_offset,
703 unsigned int auxtrace_pages,
704 bool auxtrace_overwrite);
705void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
706 struct perf_evlist *evlist, int idx,
707 bool per_cpu);
708
709#endif
710
711#endif