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8a9fd832 | 1 | // SPDX-License-Identifier: GPL-2.0 |
440a23b3 | 2 | /* |
440a23b3 MP |
3 | * Copyright(C) 2015-2018 Linaro Limited. |
4 | * | |
5 | * Author: Tor Jeremiassen <tor@ti.com> | |
6 | * Author: Mathieu Poirier <mathieu.poirier@linaro.org> | |
7 | */ | |
8 | ||
9 | #include <linux/bitops.h> | |
10 | #include <linux/err.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/log2.h> | |
13 | #include <linux/types.h> | |
7f7c536f | 14 | #include <linux/zalloc.h> |
440a23b3 | 15 | |
06220bf4 | 16 | #include <opencsd/ocsd_if_types.h> |
440a23b3 MP |
17 | #include <stdlib.h> |
18 | ||
19 | #include "auxtrace.h" | |
20 | #include "color.h" | |
21 | #include "cs-etm.h" | |
68ffe390 | 22 | #include "cs-etm-decoder/cs-etm-decoder.h" |
440a23b3 | 23 | #include "debug.h" |
4a3cec84 | 24 | #include "dso.h" |
440a23b3 MP |
25 | #include "evlist.h" |
26 | #include "intlist.h" | |
27 | #include "machine.h" | |
28 | #include "map.h" | |
29 | #include "perf.h" | |
f2a39fe8 | 30 | #include "session.h" |
d3300a3c ACM |
31 | #include "map_symbol.h" |
32 | #include "branch.h" | |
859dcf64 | 33 | #include "symbol.h" |
4a3cec84 | 34 | #include "tool.h" |
440a23b3 | 35 | #include "thread.h" |
440a23b3 | 36 | #include "thread-stack.h" |
c152d4d4 | 37 | #include <tools/libc_compat.h> |
440a23b3 MP |
38 | #include "util.h" |
39 | ||
40 | #define MAX_TIMESTAMP (~0ULL) | |
41 | ||
42 | struct cs_etm_auxtrace { | |
43 | struct auxtrace auxtrace; | |
44 | struct auxtrace_queues queues; | |
45 | struct auxtrace_heap heap; | |
46 | struct itrace_synth_opts synth_opts; | |
47 | struct perf_session *session; | |
48 | struct machine *machine; | |
49 | struct thread *unknown_thread; | |
50 | ||
51 | u8 timeless_decoding; | |
52 | u8 snapshot_mode; | |
53 | u8 data_queued; | |
54 | u8 sample_branches; | |
e573e978 | 55 | u8 sample_instructions; |
440a23b3 MP |
56 | |
57 | int num_cpu; | |
58 | u32 auxtrace_type; | |
59 | u64 branches_sample_type; | |
60 | u64 branches_id; | |
e573e978 RW |
61 | u64 instructions_sample_type; |
62 | u64 instructions_sample_period; | |
63 | u64 instructions_id; | |
440a23b3 MP |
64 | u64 **metadata; |
65 | u64 kernel_start; | |
66 | unsigned int pmu_type; | |
67 | }; | |
68 | ||
c7bfa2fd MP |
69 | struct cs_etm_traceid_queue { |
70 | u8 trace_chan_id; | |
0abb868b | 71 | pid_t pid, tid; |
c7bfa2fd MP |
72 | u64 period_instructions; |
73 | size_t last_branch_pos; | |
74 | union perf_event *event_buf; | |
3c21d7d8 | 75 | struct thread *thread; |
c7bfa2fd MP |
76 | struct branch_stack *last_branch; |
77 | struct branch_stack *last_branch_rb; | |
78 | struct cs_etm_packet *prev_packet; | |
79 | struct cs_etm_packet *packet; | |
80 | struct cs_etm_packet_queue packet_queue; | |
81 | }; | |
82 | ||
440a23b3 MP |
83 | struct cs_etm_queue { |
84 | struct cs_etm_auxtrace *etm; | |
440a23b3 MP |
85 | struct cs_etm_decoder *decoder; |
86 | struct auxtrace_buffer *buffer; | |
440a23b3 | 87 | unsigned int queue_nr; |
675f302f | 88 | u8 pending_timestamp; |
440a23b3 | 89 | u64 offset; |
23cfcd6d MP |
90 | const unsigned char *buf; |
91 | size_t buf_len, buf_used; | |
c152d4d4 MP |
92 | /* Conversion between traceID and index in traceid_queues array */ |
93 | struct intlist *traceid_queues_list; | |
94 | struct cs_etm_traceid_queue **traceid_queues; | |
440a23b3 MP |
95 | }; |
96 | ||
9f878b29 | 97 | static int cs_etm__update_queues(struct cs_etm_auxtrace *etm); |
21fe8dc1 | 98 | static int cs_etm__process_queues(struct cs_etm_auxtrace *etm); |
9f878b29 | 99 | static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, |
fc7ac413 | 100 | pid_t tid); |
21fe8dc1 MP |
101 | static int cs_etm__get_data_block(struct cs_etm_queue *etmq); |
102 | static int cs_etm__decode_data_block(struct cs_etm_queue *etmq); | |
9f878b29 | 103 | |
15a5cd19 MP |
104 | /* PTMs ETMIDR [11:8] set to b0011 */ |
105 | #define ETMIDR_PTM_VERSION 0x00000300 | |
106 | ||
21fe8dc1 MP |
107 | /* |
108 | * A struct auxtrace_heap_item only has a queue_nr and a timestamp to | |
109 | * work with. One option is to modify to auxtrace_heap_XYZ() API or simply | |
110 | * encode the etm queue number as the upper 16 bit and the channel as | |
111 | * the lower 16 bit. | |
112 | */ | |
113 | #define TO_CS_QUEUE_NR(queue_nr, trace_id_chan) \ | |
114 | (queue_nr << 16 | trace_chan_id) | |
115 | #define TO_QUEUE_NR(cs_queue_nr) (cs_queue_nr >> 16) | |
116 | #define TO_TRACE_CHAN_ID(cs_queue_nr) (cs_queue_nr & 0x0000ffff) | |
117 | ||
15a5cd19 MP |
118 | static u32 cs_etm__get_v7_protocol_version(u32 etmidr) |
119 | { | |
120 | etmidr &= ETMIDR_PTM_VERSION; | |
121 | ||
122 | if (etmidr == ETMIDR_PTM_VERSION) | |
123 | return CS_ETM_PROTO_PTM; | |
124 | ||
125 | return CS_ETM_PROTO_ETMV3; | |
126 | } | |
127 | ||
96dce7f4 LY |
128 | static int cs_etm__get_magic(u8 trace_chan_id, u64 *magic) |
129 | { | |
130 | struct int_node *inode; | |
131 | u64 *metadata; | |
132 | ||
133 | inode = intlist__find(traceid_list, trace_chan_id); | |
134 | if (!inode) | |
135 | return -EINVAL; | |
136 | ||
137 | metadata = inode->priv; | |
138 | *magic = metadata[CS_ETM_MAGIC]; | |
139 | return 0; | |
140 | } | |
141 | ||
95c6fe97 LY |
142 | int cs_etm__get_cpu(u8 trace_chan_id, int *cpu) |
143 | { | |
144 | struct int_node *inode; | |
145 | u64 *metadata; | |
146 | ||
147 | inode = intlist__find(traceid_list, trace_chan_id); | |
148 | if (!inode) | |
149 | return -EINVAL; | |
150 | ||
151 | metadata = inode->priv; | |
152 | *cpu = (int)metadata[CS_ETM_CPU]; | |
153 | return 0; | |
154 | } | |
155 | ||
675f302f MP |
156 | void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq, |
157 | u8 trace_chan_id) | |
158 | { | |
159 | /* | |
160 | * Wnen a timestamp packet is encountered the backend code | |
161 | * is stopped so that the front end has time to process packets | |
162 | * that were accumulated in the traceID queue. Since there can | |
163 | * be more than one channel per cs_etm_queue, we need to specify | |
164 | * what traceID queue needs servicing. | |
165 | */ | |
166 | etmq->pending_timestamp = trace_chan_id; | |
167 | } | |
168 | ||
21fe8dc1 MP |
169 | static u64 cs_etm__etmq_get_timestamp(struct cs_etm_queue *etmq, |
170 | u8 *trace_chan_id) | |
171 | { | |
172 | struct cs_etm_packet_queue *packet_queue; | |
173 | ||
174 | if (!etmq->pending_timestamp) | |
175 | return 0; | |
176 | ||
177 | if (trace_chan_id) | |
178 | *trace_chan_id = etmq->pending_timestamp; | |
179 | ||
180 | packet_queue = cs_etm__etmq_get_packet_queue(etmq, | |
181 | etmq->pending_timestamp); | |
182 | if (!packet_queue) | |
183 | return 0; | |
184 | ||
185 | /* Acknowledge pending status */ | |
186 | etmq->pending_timestamp = 0; | |
187 | ||
188 | /* See function cs_etm_decoder__do_{hard|soft}_timestamp() */ | |
189 | return packet_queue->timestamp; | |
190 | } | |
191 | ||
5f7cb035 MP |
192 | static void cs_etm__clear_packet_queue(struct cs_etm_packet_queue *queue) |
193 | { | |
194 | int i; | |
195 | ||
196 | queue->head = 0; | |
197 | queue->tail = 0; | |
198 | queue->packet_count = 0; | |
199 | for (i = 0; i < CS_ETM_PACKET_MAX_BUFFER; i++) { | |
200 | queue->packet_buffer[i].isa = CS_ETM_ISA_UNKNOWN; | |
201 | queue->packet_buffer[i].start_addr = CS_ETM_INVAL_ADDR; | |
202 | queue->packet_buffer[i].end_addr = CS_ETM_INVAL_ADDR; | |
203 | queue->packet_buffer[i].instr_count = 0; | |
204 | queue->packet_buffer[i].last_instr_taken_branch = false; | |
205 | queue->packet_buffer[i].last_instr_size = 0; | |
206 | queue->packet_buffer[i].last_instr_type = 0; | |
207 | queue->packet_buffer[i].last_instr_subtype = 0; | |
208 | queue->packet_buffer[i].last_instr_cond = 0; | |
209 | queue->packet_buffer[i].flags = 0; | |
210 | queue->packet_buffer[i].exception_number = UINT32_MAX; | |
211 | queue->packet_buffer[i].trace_chan_id = UINT8_MAX; | |
212 | queue->packet_buffer[i].cpu = INT_MIN; | |
213 | } | |
214 | } | |
215 | ||
21fe8dc1 MP |
216 | static void cs_etm__clear_all_packet_queues(struct cs_etm_queue *etmq) |
217 | { | |
218 | int idx; | |
219 | struct int_node *inode; | |
220 | struct cs_etm_traceid_queue *tidq; | |
221 | struct intlist *traceid_queues_list = etmq->traceid_queues_list; | |
222 | ||
223 | intlist__for_each_entry(inode, traceid_queues_list) { | |
224 | idx = (int)(intptr_t)inode->priv; | |
225 | tidq = etmq->traceid_queues[idx]; | |
226 | cs_etm__clear_packet_queue(&tidq->packet_queue); | |
227 | } | |
228 | } | |
229 | ||
c7bfa2fd MP |
230 | static int cs_etm__init_traceid_queue(struct cs_etm_queue *etmq, |
231 | struct cs_etm_traceid_queue *tidq, | |
232 | u8 trace_chan_id) | |
233 | { | |
234 | int rc = -ENOMEM; | |
0abb868b | 235 | struct auxtrace_queue *queue; |
c7bfa2fd MP |
236 | struct cs_etm_auxtrace *etm = etmq->etm; |
237 | ||
238 | cs_etm__clear_packet_queue(&tidq->packet_queue); | |
239 | ||
0abb868b MP |
240 | queue = &etmq->etm->queues.queue_array[etmq->queue_nr]; |
241 | tidq->tid = queue->tid; | |
242 | tidq->pid = -1; | |
c7bfa2fd MP |
243 | tidq->trace_chan_id = trace_chan_id; |
244 | ||
245 | tidq->packet = zalloc(sizeof(struct cs_etm_packet)); | |
246 | if (!tidq->packet) | |
247 | goto out; | |
248 | ||
249 | tidq->prev_packet = zalloc(sizeof(struct cs_etm_packet)); | |
250 | if (!tidq->prev_packet) | |
251 | goto out_free; | |
252 | ||
253 | if (etm->synth_opts.last_branch) { | |
254 | size_t sz = sizeof(struct branch_stack); | |
255 | ||
256 | sz += etm->synth_opts.last_branch_sz * | |
257 | sizeof(struct branch_entry); | |
258 | tidq->last_branch = zalloc(sz); | |
259 | if (!tidq->last_branch) | |
260 | goto out_free; | |
261 | tidq->last_branch_rb = zalloc(sz); | |
262 | if (!tidq->last_branch_rb) | |
263 | goto out_free; | |
264 | } | |
265 | ||
266 | tidq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE); | |
267 | if (!tidq->event_buf) | |
268 | goto out_free; | |
269 | ||
270 | return 0; | |
271 | ||
272 | out_free: | |
273 | zfree(&tidq->last_branch_rb); | |
274 | zfree(&tidq->last_branch); | |
275 | zfree(&tidq->prev_packet); | |
276 | zfree(&tidq->packet); | |
277 | out: | |
278 | return rc; | |
279 | } | |
280 | ||
281 | static struct cs_etm_traceid_queue | |
282 | *cs_etm__etmq_get_traceid_queue(struct cs_etm_queue *etmq, u8 trace_chan_id) | |
283 | { | |
c152d4d4 MP |
284 | int idx; |
285 | struct int_node *inode; | |
286 | struct intlist *traceid_queues_list; | |
287 | struct cs_etm_traceid_queue *tidq, **traceid_queues; | |
c7bfa2fd MP |
288 | struct cs_etm_auxtrace *etm = etmq->etm; |
289 | ||
c152d4d4 MP |
290 | if (etm->timeless_decoding) |
291 | trace_chan_id = CS_ETM_PER_THREAD_TRACEID; | |
c7bfa2fd | 292 | |
c152d4d4 | 293 | traceid_queues_list = etmq->traceid_queues_list; |
c7bfa2fd | 294 | |
c152d4d4 MP |
295 | /* |
296 | * Check if the traceid_queue exist for this traceID by looking | |
297 | * in the queue list. | |
298 | */ | |
299 | inode = intlist__find(traceid_queues_list, trace_chan_id); | |
300 | if (inode) { | |
301 | idx = (int)(intptr_t)inode->priv; | |
302 | return etmq->traceid_queues[idx]; | |
303 | } | |
c7bfa2fd | 304 | |
c152d4d4 | 305 | /* We couldn't find a traceid_queue for this traceID, allocate one */ |
c7bfa2fd MP |
306 | tidq = malloc(sizeof(*tidq)); |
307 | if (!tidq) | |
308 | return NULL; | |
309 | ||
310 | memset(tidq, 0, sizeof(*tidq)); | |
311 | ||
c152d4d4 MP |
312 | /* Get a valid index for the new traceid_queue */ |
313 | idx = intlist__nr_entries(traceid_queues_list); | |
314 | /* Memory for the inode is free'ed in cs_etm_free_traceid_queues () */ | |
315 | inode = intlist__findnew(traceid_queues_list, trace_chan_id); | |
316 | if (!inode) | |
317 | goto out_free; | |
318 | ||
319 | /* Associate this traceID with this index */ | |
320 | inode->priv = (void *)(intptr_t)idx; | |
321 | ||
c7bfa2fd MP |
322 | if (cs_etm__init_traceid_queue(etmq, tidq, trace_chan_id)) |
323 | goto out_free; | |
324 | ||
c152d4d4 MP |
325 | /* Grow the traceid_queues array by one unit */ |
326 | traceid_queues = etmq->traceid_queues; | |
327 | traceid_queues = reallocarray(traceid_queues, | |
328 | idx + 1, | |
329 | sizeof(*traceid_queues)); | |
330 | ||
331 | /* | |
332 | * On failure reallocarray() returns NULL and the original block of | |
333 | * memory is left untouched. | |
334 | */ | |
335 | if (!traceid_queues) | |
336 | goto out_free; | |
337 | ||
338 | traceid_queues[idx] = tidq; | |
339 | etmq->traceid_queues = traceid_queues; | |
c7bfa2fd | 340 | |
c152d4d4 | 341 | return etmq->traceid_queues[idx]; |
c7bfa2fd MP |
342 | |
343 | out_free: | |
c152d4d4 MP |
344 | /* |
345 | * Function intlist__remove() removes the inode from the list | |
346 | * and delete the memory associated to it. | |
347 | */ | |
348 | intlist__remove(traceid_queues_list, inode); | |
c7bfa2fd MP |
349 | free(tidq); |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
5f7cb035 | 354 | struct cs_etm_packet_queue |
c7bfa2fd | 355 | *cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id) |
5f7cb035 | 356 | { |
c7bfa2fd MP |
357 | struct cs_etm_traceid_queue *tidq; |
358 | ||
359 | tidq = cs_etm__etmq_get_traceid_queue(etmq, trace_chan_id); | |
360 | if (tidq) | |
361 | return &tidq->packet_queue; | |
362 | ||
363 | return NULL; | |
5f7cb035 MP |
364 | } |
365 | ||
68ffe390 MP |
366 | static void cs_etm__packet_dump(const char *pkt_string) |
367 | { | |
368 | const char *color = PERF_COLOR_BLUE; | |
369 | int len = strlen(pkt_string); | |
370 | ||
371 | if (len && (pkt_string[len-1] == '\n')) | |
372 | color_fprintf(stdout, color, " %s", pkt_string); | |
373 | else | |
374 | color_fprintf(stdout, color, " %s\n", pkt_string); | |
375 | ||
376 | fflush(stdout); | |
377 | } | |
378 | ||
2507a3d9 MP |
379 | static void cs_etm__set_trace_param_etmv3(struct cs_etm_trace_params *t_params, |
380 | struct cs_etm_auxtrace *etm, int idx, | |
381 | u32 etmidr) | |
382 | { | |
383 | u64 **metadata = etm->metadata; | |
384 | ||
385 | t_params[idx].protocol = cs_etm__get_v7_protocol_version(etmidr); | |
386 | t_params[idx].etmv3.reg_ctrl = metadata[idx][CS_ETM_ETMCR]; | |
387 | t_params[idx].etmv3.reg_trc_id = metadata[idx][CS_ETM_ETMTRACEIDR]; | |
388 | } | |
389 | ||
390 | static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params, | |
391 | struct cs_etm_auxtrace *etm, int idx) | |
392 | { | |
393 | u64 **metadata = etm->metadata; | |
394 | ||
395 | t_params[idx].protocol = CS_ETM_PROTO_ETMV4i; | |
396 | t_params[idx].etmv4.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0]; | |
397 | t_params[idx].etmv4.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1]; | |
398 | t_params[idx].etmv4.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2]; | |
399 | t_params[idx].etmv4.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8]; | |
400 | t_params[idx].etmv4.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR]; | |
401 | t_params[idx].etmv4.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR]; | |
402 | } | |
403 | ||
404 | static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params, | |
405 | struct cs_etm_auxtrace *etm) | |
406 | { | |
407 | int i; | |
408 | u32 etmidr; | |
409 | u64 architecture; | |
410 | ||
411 | for (i = 0; i < etm->num_cpu; i++) { | |
412 | architecture = etm->metadata[i][CS_ETM_MAGIC]; | |
413 | ||
414 | switch (architecture) { | |
415 | case __perf_cs_etmv3_magic: | |
416 | etmidr = etm->metadata[i][CS_ETM_ETMIDR]; | |
417 | cs_etm__set_trace_param_etmv3(t_params, etm, i, etmidr); | |
418 | break; | |
419 | case __perf_cs_etmv4_magic: | |
420 | cs_etm__set_trace_param_etmv4(t_params, etm, i); | |
421 | break; | |
422 | default: | |
423 | return -EINVAL; | |
424 | } | |
425 | } | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
65963e5b MP |
430 | static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params, |
431 | struct cs_etm_queue *etmq, | |
432 | enum cs_etm_decoder_operation mode) | |
433 | { | |
434 | int ret = -EINVAL; | |
435 | ||
436 | if (!(mode < CS_ETM_OPERATION_MAX)) | |
437 | goto out; | |
438 | ||
439 | d_params->packet_printer = cs_etm__packet_dump; | |
440 | d_params->operation = mode; | |
441 | d_params->data = etmq; | |
442 | d_params->formatted = true; | |
443 | d_params->fsyncs = false; | |
444 | d_params->hsyncs = false; | |
445 | d_params->frame_aligned = true; | |
446 | ||
447 | ret = 0; | |
448 | out: | |
449 | return ret; | |
450 | } | |
451 | ||
68ffe390 MP |
452 | static void cs_etm__dump_event(struct cs_etm_auxtrace *etm, |
453 | struct auxtrace_buffer *buffer) | |
454 | { | |
2507a3d9 | 455 | int ret; |
68ffe390 MP |
456 | const char *color = PERF_COLOR_BLUE; |
457 | struct cs_etm_decoder_params d_params; | |
458 | struct cs_etm_trace_params *t_params; | |
459 | struct cs_etm_decoder *decoder; | |
460 | size_t buffer_used = 0; | |
461 | ||
462 | fprintf(stdout, "\n"); | |
463 | color_fprintf(stdout, color, | |
464 | ". ... CoreSight ETM Trace data: size %zu bytes\n", | |
465 | buffer->size); | |
466 | ||
467 | /* Use metadata to fill in trace parameters for trace decoder */ | |
468 | t_params = zalloc(sizeof(*t_params) * etm->num_cpu); | |
ae4d9f52 MP |
469 | |
470 | if (!t_params) | |
471 | return; | |
472 | ||
2507a3d9 MP |
473 | if (cs_etm__init_trace_params(t_params, etm)) |
474 | goto out_free; | |
68ffe390 MP |
475 | |
476 | /* Set decoder parameters to simply print the trace packets */ | |
65963e5b MP |
477 | if (cs_etm__init_decoder_params(&d_params, NULL, |
478 | CS_ETM_OPERATION_PRINT)) | |
ae4d9f52 | 479 | goto out_free; |
68ffe390 MP |
480 | |
481 | decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params); | |
482 | ||
68ffe390 | 483 | if (!decoder) |
ae4d9f52 | 484 | goto out_free; |
68ffe390 MP |
485 | do { |
486 | size_t consumed; | |
487 | ||
488 | ret = cs_etm_decoder__process_data_block( | |
489 | decoder, buffer->offset, | |
490 | &((u8 *)buffer->data)[buffer_used], | |
491 | buffer->size - buffer_used, &consumed); | |
492 | if (ret) | |
493 | break; | |
494 | ||
495 | buffer_used += consumed; | |
496 | } while (buffer_used < buffer->size); | |
497 | ||
498 | cs_etm_decoder__free(decoder); | |
ae4d9f52 MP |
499 | |
500 | out_free: | |
501 | zfree(&t_params); | |
68ffe390 MP |
502 | } |
503 | ||
440a23b3 MP |
504 | static int cs_etm__flush_events(struct perf_session *session, |
505 | struct perf_tool *tool) | |
506 | { | |
9f878b29 MP |
507 | int ret; |
508 | struct cs_etm_auxtrace *etm = container_of(session->auxtrace, | |
509 | struct cs_etm_auxtrace, | |
510 | auxtrace); | |
511 | if (dump_trace) | |
512 | return 0; | |
513 | ||
514 | if (!tool->ordered_events) | |
515 | return -EINVAL; | |
516 | ||
9f878b29 MP |
517 | ret = cs_etm__update_queues(etm); |
518 | ||
519 | if (ret < 0) | |
520 | return ret; | |
521 | ||
21fe8dc1 MP |
522 | if (etm->timeless_decoding) |
523 | return cs_etm__process_timeless_queues(etm, -1); | |
524 | ||
525 | return cs_etm__process_queues(etm); | |
440a23b3 MP |
526 | } |
527 | ||
c152d4d4 MP |
528 | static void cs_etm__free_traceid_queues(struct cs_etm_queue *etmq) |
529 | { | |
530 | int idx; | |
531 | uintptr_t priv; | |
532 | struct int_node *inode, *tmp; | |
533 | struct cs_etm_traceid_queue *tidq; | |
534 | struct intlist *traceid_queues_list = etmq->traceid_queues_list; | |
535 | ||
536 | intlist__for_each_entry_safe(inode, tmp, traceid_queues_list) { | |
537 | priv = (uintptr_t)inode->priv; | |
538 | idx = priv; | |
539 | ||
540 | /* Free this traceid_queue from the array */ | |
541 | tidq = etmq->traceid_queues[idx]; | |
542 | thread__zput(tidq->thread); | |
543 | zfree(&tidq->event_buf); | |
544 | zfree(&tidq->last_branch); | |
545 | zfree(&tidq->last_branch_rb); | |
546 | zfree(&tidq->prev_packet); | |
547 | zfree(&tidq->packet); | |
548 | zfree(&tidq); | |
549 | ||
550 | /* | |
551 | * Function intlist__remove() removes the inode from the list | |
552 | * and delete the memory associated to it. | |
553 | */ | |
554 | intlist__remove(traceid_queues_list, inode); | |
555 | } | |
556 | ||
557 | /* Then the RB tree itself */ | |
558 | intlist__delete(traceid_queues_list); | |
559 | etmq->traceid_queues_list = NULL; | |
560 | ||
561 | /* finally free the traceid_queues array */ | |
d8f9da24 | 562 | zfree(&etmq->traceid_queues); |
c152d4d4 MP |
563 | } |
564 | ||
440a23b3 MP |
565 | static void cs_etm__free_queue(void *priv) |
566 | { | |
567 | struct cs_etm_queue *etmq = priv; | |
568 | ||
099c1130 MP |
569 | if (!etmq) |
570 | return; | |
571 | ||
099c1130 | 572 | cs_etm_decoder__free(etmq->decoder); |
c152d4d4 | 573 | cs_etm__free_traceid_queues(etmq); |
440a23b3 MP |
574 | free(etmq); |
575 | } | |
576 | ||
577 | static void cs_etm__free_events(struct perf_session *session) | |
578 | { | |
579 | unsigned int i; | |
580 | struct cs_etm_auxtrace *aux = container_of(session->auxtrace, | |
581 | struct cs_etm_auxtrace, | |
582 | auxtrace); | |
583 | struct auxtrace_queues *queues = &aux->queues; | |
584 | ||
585 | for (i = 0; i < queues->nr_queues; i++) { | |
586 | cs_etm__free_queue(queues->queue_array[i].priv); | |
587 | queues->queue_array[i].priv = NULL; | |
588 | } | |
589 | ||
590 | auxtrace_queues__free(queues); | |
591 | } | |
592 | ||
593 | static void cs_etm__free(struct perf_session *session) | |
594 | { | |
cd8bfd8c TJ |
595 | int i; |
596 | struct int_node *inode, *tmp; | |
440a23b3 MP |
597 | struct cs_etm_auxtrace *aux = container_of(session->auxtrace, |
598 | struct cs_etm_auxtrace, | |
599 | auxtrace); | |
600 | cs_etm__free_events(session); | |
601 | session->auxtrace = NULL; | |
602 | ||
95c6fe97 | 603 | /* First remove all traceID/metadata nodes for the RB tree */ |
cd8bfd8c TJ |
604 | intlist__for_each_entry_safe(inode, tmp, traceid_list) |
605 | intlist__remove(traceid_list, inode); | |
606 | /* Then the RB tree itself */ | |
607 | intlist__delete(traceid_list); | |
608 | ||
609 | for (i = 0; i < aux->num_cpu; i++) | |
610 | zfree(&aux->metadata[i]); | |
611 | ||
46d53620 | 612 | thread__zput(aux->unknown_thread); |
cd8bfd8c | 613 | zfree(&aux->metadata); |
440a23b3 MP |
614 | zfree(&aux); |
615 | } | |
616 | ||
d6c9c05f LY |
617 | static u8 cs_etm__cpu_mode(struct cs_etm_queue *etmq, u64 address) |
618 | { | |
619 | struct machine *machine; | |
620 | ||
621 | machine = etmq->etm->machine; | |
622 | ||
623 | if (address >= etmq->etm->kernel_start) { | |
624 | if (machine__is_host(machine)) | |
625 | return PERF_RECORD_MISC_KERNEL; | |
626 | else | |
627 | return PERF_RECORD_MISC_GUEST_KERNEL; | |
628 | } else { | |
629 | if (machine__is_host(machine)) | |
630 | return PERF_RECORD_MISC_USER; | |
631 | else if (perf_guest) | |
632 | return PERF_RECORD_MISC_GUEST_USER; | |
633 | else | |
634 | return PERF_RECORD_MISC_HYPERVISOR; | |
635 | } | |
636 | } | |
637 | ||
af21577c MP |
638 | static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u8 trace_chan_id, |
639 | u64 address, size_t size, u8 *buffer) | |
20d9c478 MP |
640 | { |
641 | u8 cpumode; | |
642 | u64 offset; | |
643 | int len; | |
c152d4d4 MP |
644 | struct thread *thread; |
645 | struct machine *machine; | |
646 | struct addr_location al; | |
647 | struct cs_etm_traceid_queue *tidq; | |
af21577c | 648 | |
20d9c478 | 649 | if (!etmq) |
d3267ad4 | 650 | return 0; |
20d9c478 MP |
651 | |
652 | machine = etmq->etm->machine; | |
d6c9c05f | 653 | cpumode = cs_etm__cpu_mode(etmq, address); |
c152d4d4 MP |
654 | tidq = cs_etm__etmq_get_traceid_queue(etmq, trace_chan_id); |
655 | if (!tidq) | |
656 | return 0; | |
20d9c478 | 657 | |
c152d4d4 | 658 | thread = tidq->thread; |
20d9c478 MP |
659 | if (!thread) { |
660 | if (cpumode != PERF_RECORD_MISC_KERNEL) | |
d3267ad4 | 661 | return 0; |
20d9c478 MP |
662 | thread = etmq->etm->unknown_thread; |
663 | } | |
664 | ||
71a84b5a | 665 | if (!thread__find_map(thread, cpumode, address, &al) || !al.map->dso) |
20d9c478 MP |
666 | return 0; |
667 | ||
668 | if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR && | |
669 | dso__data_status_seen(al.map->dso, DSO_DATA_STATUS_SEEN_ITRACE)) | |
670 | return 0; | |
671 | ||
672 | offset = al.map->map_ip(al.map, address); | |
673 | ||
674 | map__load(al.map); | |
675 | ||
676 | len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size); | |
677 | ||
678 | if (len <= 0) | |
679 | return 0; | |
680 | ||
681 | return len; | |
682 | } | |
683 | ||
4f5b3713 | 684 | static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm) |
20d9c478 | 685 | { |
20d9c478 | 686 | struct cs_etm_decoder_params d_params; |
ae4d9f52 | 687 | struct cs_etm_trace_params *t_params = NULL; |
20d9c478 MP |
688 | struct cs_etm_queue *etmq; |
689 | ||
690 | etmq = zalloc(sizeof(*etmq)); | |
691 | if (!etmq) | |
692 | return NULL; | |
693 | ||
c152d4d4 MP |
694 | etmq->traceid_queues_list = intlist__new(NULL); |
695 | if (!etmq->traceid_queues_list) | |
696 | goto out_free; | |
697 | ||
20d9c478 MP |
698 | /* Use metadata to fill in trace parameters for trace decoder */ |
699 | t_params = zalloc(sizeof(*t_params) * etm->num_cpu); | |
700 | ||
701 | if (!t_params) | |
702 | goto out_free; | |
703 | ||
2507a3d9 MP |
704 | if (cs_etm__init_trace_params(t_params, etm)) |
705 | goto out_free; | |
20d9c478 | 706 | |
e4aa592d | 707 | /* Set decoder parameters to decode trace packets */ |
65963e5b MP |
708 | if (cs_etm__init_decoder_params(&d_params, etmq, |
709 | CS_ETM_OPERATION_DECODE)) | |
710 | goto out_free; | |
20d9c478 MP |
711 | |
712 | etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params); | |
713 | ||
20d9c478 MP |
714 | if (!etmq->decoder) |
715 | goto out_free; | |
716 | ||
717 | /* | |
718 | * Register a function to handle all memory accesses required by | |
719 | * the trace decoder library. | |
720 | */ | |
721 | if (cs_etm_decoder__add_mem_access_cb(etmq->decoder, | |
722 | 0x0L, ((u64) -1L), | |
723 | cs_etm__mem_access)) | |
724 | goto out_free_decoder; | |
725 | ||
ae4d9f52 | 726 | zfree(&t_params); |
20d9c478 MP |
727 | return etmq; |
728 | ||
729 | out_free_decoder: | |
730 | cs_etm_decoder__free(etmq->decoder); | |
731 | out_free: | |
c152d4d4 | 732 | intlist__delete(etmq->traceid_queues_list); |
20d9c478 MP |
733 | free(etmq); |
734 | ||
735 | return NULL; | |
736 | } | |
737 | ||
738 | static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm, | |
739 | struct auxtrace_queue *queue, | |
740 | unsigned int queue_nr) | |
741 | { | |
4f5b3713 | 742 | int ret = 0; |
21fe8dc1 MP |
743 | unsigned int cs_queue_nr; |
744 | u8 trace_chan_id; | |
745 | u64 timestamp; | |
20d9c478 MP |
746 | struct cs_etm_queue *etmq = queue->priv; |
747 | ||
748 | if (list_empty(&queue->head) || etmq) | |
4f5b3713 | 749 | goto out; |
20d9c478 | 750 | |
4f5b3713 | 751 | etmq = cs_etm__alloc_queue(etm); |
20d9c478 | 752 | |
4f5b3713 MP |
753 | if (!etmq) { |
754 | ret = -ENOMEM; | |
755 | goto out; | |
756 | } | |
20d9c478 MP |
757 | |
758 | queue->priv = etmq; | |
4f5b3713 MP |
759 | etmq->etm = etm; |
760 | etmq->queue_nr = queue_nr; | |
4f5b3713 | 761 | etmq->offset = 0; |
20d9c478 | 762 | |
21fe8dc1 MP |
763 | if (etm->timeless_decoding) |
764 | goto out; | |
765 | ||
766 | /* | |
767 | * We are under a CPU-wide trace scenario. As such we need to know | |
768 | * when the code that generated the traces started to execute so that | |
769 | * it can be correlated with execution on other CPUs. So we get a | |
770 | * handle on the beginning of traces and decode until we find a | |
771 | * timestamp. The timestamp is then added to the auxtrace min heap | |
772 | * in order to know what nibble (of all the etmqs) to decode first. | |
773 | */ | |
774 | while (1) { | |
775 | /* | |
776 | * Fetch an aux_buffer from this etmq. Bail if no more | |
777 | * blocks or an error has been encountered. | |
778 | */ | |
779 | ret = cs_etm__get_data_block(etmq); | |
780 | if (ret <= 0) | |
781 | goto out; | |
782 | ||
783 | /* | |
784 | * Run decoder on the trace block. The decoder will stop when | |
785 | * encountering a timestamp, a full packet queue or the end of | |
786 | * trace for that block. | |
787 | */ | |
788 | ret = cs_etm__decode_data_block(etmq); | |
789 | if (ret) | |
790 | goto out; | |
791 | ||
792 | /* | |
793 | * Function cs_etm_decoder__do_{hard|soft}_timestamp() does all | |
794 | * the timestamp calculation for us. | |
795 | */ | |
796 | timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); | |
797 | ||
798 | /* We found a timestamp, no need to continue. */ | |
799 | if (timestamp) | |
800 | break; | |
801 | ||
802 | /* | |
803 | * We didn't find a timestamp so empty all the traceid packet | |
804 | * queues before looking for another timestamp packet, either | |
805 | * in the current data block or a new one. Packets that were | |
806 | * just decoded are useless since no timestamp has been | |
807 | * associated with them. As such simply discard them. | |
808 | */ | |
809 | cs_etm__clear_all_packet_queues(etmq); | |
810 | } | |
811 | ||
812 | /* | |
813 | * We have a timestamp. Add it to the min heap to reflect when | |
814 | * instructions conveyed by the range packets of this traceID queue | |
815 | * started to execute. Once the same has been done for all the traceID | |
816 | * queues of each etmq, redenring and decoding can start in | |
817 | * chronological order. | |
818 | * | |
819 | * Note that packets decoded above are still in the traceID's packet | |
820 | * queue and will be processed in cs_etm__process_queues(). | |
821 | */ | |
822 | cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_id_chan); | |
823 | ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); | |
4f5b3713 MP |
824 | out: |
825 | return ret; | |
20d9c478 MP |
826 | } |
827 | ||
828 | static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm) | |
829 | { | |
830 | unsigned int i; | |
831 | int ret; | |
832 | ||
4b6df11a MP |
833 | if (!etm->kernel_start) |
834 | etm->kernel_start = machine__kernel_start(etm->machine); | |
835 | ||
20d9c478 MP |
836 | for (i = 0; i < etm->queues.nr_queues; i++) { |
837 | ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i); | |
838 | if (ret) | |
839 | return ret; | |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | static int cs_etm__update_queues(struct cs_etm_auxtrace *etm) | |
846 | { | |
847 | if (etm->queues.new_data) { | |
848 | etm->queues.new_data = false; | |
849 | return cs_etm__setup_queues(etm); | |
850 | } | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
c7bfa2fd MP |
855 | static inline |
856 | void cs_etm__copy_last_branch_rb(struct cs_etm_queue *etmq, | |
857 | struct cs_etm_traceid_queue *tidq) | |
e573e978 | 858 | { |
c7bfa2fd MP |
859 | struct branch_stack *bs_src = tidq->last_branch_rb; |
860 | struct branch_stack *bs_dst = tidq->last_branch; | |
e573e978 RW |
861 | size_t nr = 0; |
862 | ||
863 | /* | |
864 | * Set the number of records before early exit: ->nr is used to | |
865 | * determine how many branches to copy from ->entries. | |
866 | */ | |
867 | bs_dst->nr = bs_src->nr; | |
868 | ||
869 | /* | |
870 | * Early exit when there is nothing to copy. | |
871 | */ | |
872 | if (!bs_src->nr) | |
873 | return; | |
874 | ||
875 | /* | |
876 | * As bs_src->entries is a circular buffer, we need to copy from it in | |
877 | * two steps. First, copy the branches from the most recently inserted | |
878 | * branch ->last_branch_pos until the end of bs_src->entries buffer. | |
879 | */ | |
c7bfa2fd | 880 | nr = etmq->etm->synth_opts.last_branch_sz - tidq->last_branch_pos; |
e573e978 | 881 | memcpy(&bs_dst->entries[0], |
c7bfa2fd | 882 | &bs_src->entries[tidq->last_branch_pos], |
e573e978 RW |
883 | sizeof(struct branch_entry) * nr); |
884 | ||
885 | /* | |
886 | * If we wrapped around at least once, the branches from the beginning | |
887 | * of the bs_src->entries buffer and until the ->last_branch_pos element | |
888 | * are older valid branches: copy them over. The total number of | |
889 | * branches copied over will be equal to the number of branches asked by | |
890 | * the user in last_branch_sz. | |
891 | */ | |
892 | if (bs_src->nr >= etmq->etm->synth_opts.last_branch_sz) { | |
893 | memcpy(&bs_dst->entries[nr], | |
894 | &bs_src->entries[0], | |
c7bfa2fd | 895 | sizeof(struct branch_entry) * tidq->last_branch_pos); |
e573e978 RW |
896 | } |
897 | } | |
898 | ||
c7bfa2fd MP |
899 | static inline |
900 | void cs_etm__reset_last_branch_rb(struct cs_etm_traceid_queue *tidq) | |
e573e978 | 901 | { |
c7bfa2fd MP |
902 | tidq->last_branch_pos = 0; |
903 | tidq->last_branch_rb->nr = 0; | |
e573e978 RW |
904 | } |
905 | ||
a7ee4d62 | 906 | static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq, |
af21577c MP |
907 | u8 trace_chan_id, u64 addr) |
908 | { | |
a7ee4d62 | 909 | u8 instrBytes[2]; |
6035b680 | 910 | |
af21577c MP |
911 | cs_etm__mem_access(etmq, trace_chan_id, addr, |
912 | ARRAY_SIZE(instrBytes), instrBytes); | |
e573e978 | 913 | /* |
a7ee4d62 RW |
914 | * T32 instruction size is indicated by bits[15:11] of the first |
915 | * 16-bit word of the instruction: 0b11101, 0b11110 and 0b11111 | |
916 | * denote a 32-bit instruction. | |
e573e978 | 917 | */ |
a7ee4d62 | 918 | return ((instrBytes[1] & 0xF8) >= 0xE8) ? 4 : 2; |
e573e978 RW |
919 | } |
920 | ||
6035b680 LY |
921 | static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) |
922 | { | |
49ccf87b LY |
923 | /* Returns 0 for the CS_ETM_DISCONTINUITY packet */ |
924 | if (packet->sample_type == CS_ETM_DISCONTINUITY) | |
6035b680 LY |
925 | return 0; |
926 | ||
927 | return packet->start_addr; | |
928 | } | |
929 | ||
a7ee4d62 RW |
930 | static inline |
931 | u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet) | |
e573e978 | 932 | { |
49ccf87b LY |
933 | /* Returns 0 for the CS_ETM_DISCONTINUITY packet */ |
934 | if (packet->sample_type == CS_ETM_DISCONTINUITY) | |
a7ee4d62 RW |
935 | return 0; |
936 | ||
937 | return packet->end_addr - packet->last_instr_size; | |
e573e978 RW |
938 | } |
939 | ||
a7ee4d62 | 940 | static inline u64 cs_etm__instr_addr(struct cs_etm_queue *etmq, |
af21577c | 941 | u64 trace_chan_id, |
a7ee4d62 | 942 | const struct cs_etm_packet *packet, |
e573e978 RW |
943 | u64 offset) |
944 | { | |
a7ee4d62 RW |
945 | if (packet->isa == CS_ETM_ISA_T32) { |
946 | u64 addr = packet->start_addr; | |
947 | ||
948 | while (offset > 0) { | |
af21577c MP |
949 | addr += cs_etm__t32_instr_size(etmq, |
950 | trace_chan_id, addr); | |
a7ee4d62 RW |
951 | offset--; |
952 | } | |
953 | return addr; | |
954 | } | |
955 | ||
956 | /* Assume a 4 byte instruction size (A32/A64) */ | |
957 | return packet->start_addr + offset * 4; | |
e573e978 RW |
958 | } |
959 | ||
c7bfa2fd MP |
960 | static void cs_etm__update_last_branch_rb(struct cs_etm_queue *etmq, |
961 | struct cs_etm_traceid_queue *tidq) | |
e573e978 | 962 | { |
c7bfa2fd | 963 | struct branch_stack *bs = tidq->last_branch_rb; |
e573e978 RW |
964 | struct branch_entry *be; |
965 | ||
966 | /* | |
967 | * The branches are recorded in a circular buffer in reverse | |
968 | * chronological order: we start recording from the last element of the | |
969 | * buffer down. After writing the first element of the stack, move the | |
970 | * insert position back to the end of the buffer. | |
971 | */ | |
c7bfa2fd MP |
972 | if (!tidq->last_branch_pos) |
973 | tidq->last_branch_pos = etmq->etm->synth_opts.last_branch_sz; | |
e573e978 | 974 | |
c7bfa2fd | 975 | tidq->last_branch_pos -= 1; |
e573e978 | 976 | |
c7bfa2fd MP |
977 | be = &bs->entries[tidq->last_branch_pos]; |
978 | be->from = cs_etm__last_executed_instr(tidq->prev_packet); | |
979 | be->to = cs_etm__first_executed_instr(tidq->packet); | |
e573e978 RW |
980 | /* No support for mispredict */ |
981 | be->flags.mispred = 0; | |
982 | be->flags.predicted = 1; | |
983 | ||
984 | /* | |
985 | * Increment bs->nr until reaching the number of last branches asked by | |
986 | * the user on the command line. | |
987 | */ | |
988 | if (bs->nr < etmq->etm->synth_opts.last_branch_sz) | |
989 | bs->nr += 1; | |
990 | } | |
991 | ||
992 | static int cs_etm__inject_event(union perf_event *event, | |
993 | struct perf_sample *sample, u64 type) | |
994 | { | |
995 | event->header.size = perf_event__sample_event_size(sample, type, 0); | |
996 | return perf_event__synthesize_sample(event, type, 0, sample); | |
997 | } | |
998 | ||
999 | ||
9f878b29 | 1000 | static int |
23cfcd6d | 1001 | cs_etm__get_trace(struct cs_etm_queue *etmq) |
9f878b29 MP |
1002 | { |
1003 | struct auxtrace_buffer *aux_buffer = etmq->buffer; | |
1004 | struct auxtrace_buffer *old_buffer = aux_buffer; | |
1005 | struct auxtrace_queue *queue; | |
1006 | ||
1007 | queue = &etmq->etm->queues.queue_array[etmq->queue_nr]; | |
1008 | ||
1009 | aux_buffer = auxtrace_buffer__next(queue, aux_buffer); | |
1010 | ||
1011 | /* If no more data, drop the previous auxtrace_buffer and return */ | |
1012 | if (!aux_buffer) { | |
1013 | if (old_buffer) | |
1014 | auxtrace_buffer__drop_data(old_buffer); | |
23cfcd6d | 1015 | etmq->buf_len = 0; |
9f878b29 MP |
1016 | return 0; |
1017 | } | |
1018 | ||
1019 | etmq->buffer = aux_buffer; | |
1020 | ||
1021 | /* If the aux_buffer doesn't have data associated, try to load it */ | |
1022 | if (!aux_buffer->data) { | |
1023 | /* get the file desc associated with the perf data file */ | |
1024 | int fd = perf_data__fd(etmq->etm->session->data); | |
1025 | ||
1026 | aux_buffer->data = auxtrace_buffer__get_data(aux_buffer, fd); | |
1027 | if (!aux_buffer->data) | |
1028 | return -ENOMEM; | |
1029 | } | |
1030 | ||
1031 | /* If valid, drop the previous buffer */ | |
1032 | if (old_buffer) | |
1033 | auxtrace_buffer__drop_data(old_buffer); | |
1034 | ||
23cfcd6d MP |
1035 | etmq->buf_used = 0; |
1036 | etmq->buf_len = aux_buffer->size; | |
1037 | etmq->buf = aux_buffer->data; | |
9f878b29 | 1038 | |
23cfcd6d | 1039 | return etmq->buf_len; |
9f878b29 MP |
1040 | } |
1041 | ||
3a088799 | 1042 | static void cs_etm__set_pid_tid_cpu(struct cs_etm_auxtrace *etm, |
0abb868b | 1043 | struct cs_etm_traceid_queue *tidq) |
9f878b29 | 1044 | { |
0abb868b | 1045 | if ((!tidq->thread) && (tidq->tid != -1)) |
3c21d7d8 | 1046 | tidq->thread = machine__find_thread(etm->machine, -1, |
0abb868b | 1047 | tidq->tid); |
9f878b29 | 1048 | |
3c21d7d8 | 1049 | if (tidq->thread) |
0abb868b | 1050 | tidq->pid = tidq->thread->pid_; |
9f878b29 MP |
1051 | } |
1052 | ||
0a6be300 MP |
1053 | int cs_etm__etmq_set_tid(struct cs_etm_queue *etmq, |
1054 | pid_t tid, u8 trace_chan_id) | |
1055 | { | |
1056 | int cpu, err = -EINVAL; | |
1057 | struct cs_etm_auxtrace *etm = etmq->etm; | |
1058 | struct cs_etm_traceid_queue *tidq; | |
1059 | ||
1060 | tidq = cs_etm__etmq_get_traceid_queue(etmq, trace_chan_id); | |
1061 | if (!tidq) | |
1062 | return err; | |
1063 | ||
1064 | if (cs_etm__get_cpu(trace_chan_id, &cpu) < 0) | |
1065 | return err; | |
1066 | ||
1067 | err = machine__set_current_tid(etm->machine, cpu, tid, tid); | |
1068 | if (err) | |
1069 | return err; | |
1070 | ||
1071 | tidq->tid = tid; | |
1072 | thread__zput(tidq->thread); | |
1073 | ||
1074 | cs_etm__set_pid_tid_cpu(etm, tidq); | |
1075 | return 0; | |
1076 | } | |
1077 | ||
675f302f MP |
1078 | bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq) |
1079 | { | |
1080 | return !!etmq->etm->timeless_decoding; | |
1081 | } | |
1082 | ||
a4973d8f LY |
1083 | static void cs_etm__copy_insn(struct cs_etm_queue *etmq, |
1084 | u64 trace_chan_id, | |
1085 | const struct cs_etm_packet *packet, | |
1086 | struct perf_sample *sample) | |
1087 | { | |
1088 | /* | |
1089 | * It's pointless to read instructions for the CS_ETM_DISCONTINUITY | |
1090 | * packet, so directly bail out with 'insn_len' = 0. | |
1091 | */ | |
1092 | if (packet->sample_type == CS_ETM_DISCONTINUITY) { | |
1093 | sample->insn_len = 0; | |
1094 | return; | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * T32 instruction size might be 32-bit or 16-bit, decide by calling | |
1099 | * cs_etm__t32_instr_size(). | |
1100 | */ | |
1101 | if (packet->isa == CS_ETM_ISA_T32) | |
1102 | sample->insn_len = cs_etm__t32_instr_size(etmq, trace_chan_id, | |
1103 | sample->ip); | |
1104 | /* Otherwise, A64 and A32 instruction size are always 32-bit. */ | |
1105 | else | |
1106 | sample->insn_len = 4; | |
1107 | ||
1108 | cs_etm__mem_access(etmq, trace_chan_id, sample->ip, | |
1109 | sample->insn_len, (void *)sample->insn); | |
1110 | } | |
1111 | ||
e573e978 | 1112 | static int cs_etm__synth_instruction_sample(struct cs_etm_queue *etmq, |
c7bfa2fd | 1113 | struct cs_etm_traceid_queue *tidq, |
e573e978 RW |
1114 | u64 addr, u64 period) |
1115 | { | |
1116 | int ret = 0; | |
1117 | struct cs_etm_auxtrace *etm = etmq->etm; | |
c7bfa2fd | 1118 | union perf_event *event = tidq->event_buf; |
e573e978 RW |
1119 | struct perf_sample sample = {.ip = 0,}; |
1120 | ||
1121 | event->sample.header.type = PERF_RECORD_SAMPLE; | |
d6c9c05f | 1122 | event->sample.header.misc = cs_etm__cpu_mode(etmq, addr); |
e573e978 RW |
1123 | event->sample.header.size = sizeof(struct perf_event_header); |
1124 | ||
1125 | sample.ip = addr; | |
0abb868b MP |
1126 | sample.pid = tidq->pid; |
1127 | sample.tid = tidq->tid; | |
e573e978 RW |
1128 | sample.id = etmq->etm->instructions_id; |
1129 | sample.stream_id = etmq->etm->instructions_id; | |
1130 | sample.period = period; | |
c7bfa2fd MP |
1131 | sample.cpu = tidq->packet->cpu; |
1132 | sample.flags = tidq->prev_packet->flags; | |
d6c9c05f | 1133 | sample.cpumode = event->sample.header.misc; |
e573e978 | 1134 | |
a4973d8f LY |
1135 | cs_etm__copy_insn(etmq, tidq->trace_chan_id, tidq->packet, &sample); |
1136 | ||
e573e978 | 1137 | if (etm->synth_opts.last_branch) { |
c7bfa2fd MP |
1138 | cs_etm__copy_last_branch_rb(etmq, tidq); |
1139 | sample.branch_stack = tidq->last_branch; | |
e573e978 RW |
1140 | } |
1141 | ||
1142 | if (etm->synth_opts.inject) { | |
1143 | ret = cs_etm__inject_event(event, &sample, | |
1144 | etm->instructions_sample_type); | |
1145 | if (ret) | |
1146 | return ret; | |
1147 | } | |
1148 | ||
1149 | ret = perf_session__deliver_synth_event(etm->session, event, &sample); | |
1150 | ||
1151 | if (ret) | |
1152 | pr_err( | |
1153 | "CS ETM Trace: failed to deliver instruction event, error %d\n", | |
1154 | ret); | |
1155 | ||
1156 | if (etm->synth_opts.last_branch) | |
c7bfa2fd | 1157 | cs_etm__reset_last_branch_rb(tidq); |
e573e978 RW |
1158 | |
1159 | return ret; | |
1160 | } | |
1161 | ||
b12235b1 MP |
1162 | /* |
1163 | * The cs etm packet encodes an instruction range between a branch target | |
1164 | * and the next taken branch. Generate sample accordingly. | |
1165 | */ | |
c7bfa2fd MP |
1166 | static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq, |
1167 | struct cs_etm_traceid_queue *tidq) | |
b12235b1 MP |
1168 | { |
1169 | int ret = 0; | |
1170 | struct cs_etm_auxtrace *etm = etmq->etm; | |
1171 | struct perf_sample sample = {.ip = 0,}; | |
c7bfa2fd | 1172 | union perf_event *event = tidq->event_buf; |
e573e978 RW |
1173 | struct dummy_branch_stack { |
1174 | u64 nr; | |
1175 | struct branch_entry entries; | |
1176 | } dummy_bs; | |
d6c9c05f LY |
1177 | u64 ip; |
1178 | ||
c7bfa2fd | 1179 | ip = cs_etm__last_executed_instr(tidq->prev_packet); |
b12235b1 MP |
1180 | |
1181 | event->sample.header.type = PERF_RECORD_SAMPLE; | |
d6c9c05f | 1182 | event->sample.header.misc = cs_etm__cpu_mode(etmq, ip); |
b12235b1 MP |
1183 | event->sample.header.size = sizeof(struct perf_event_header); |
1184 | ||
d6c9c05f | 1185 | sample.ip = ip; |
0abb868b MP |
1186 | sample.pid = tidq->pid; |
1187 | sample.tid = tidq->tid; | |
c7bfa2fd | 1188 | sample.addr = cs_etm__first_executed_instr(tidq->packet); |
b12235b1 MP |
1189 | sample.id = etmq->etm->branches_id; |
1190 | sample.stream_id = etmq->etm->branches_id; | |
1191 | sample.period = 1; | |
c7bfa2fd MP |
1192 | sample.cpu = tidq->packet->cpu; |
1193 | sample.flags = tidq->prev_packet->flags; | |
d6c9c05f | 1194 | sample.cpumode = event->sample.header.misc; |
b12235b1 | 1195 | |
a4973d8f LY |
1196 | cs_etm__copy_insn(etmq, tidq->trace_chan_id, tidq->prev_packet, |
1197 | &sample); | |
1198 | ||
e573e978 RW |
1199 | /* |
1200 | * perf report cannot handle events without a branch stack | |
1201 | */ | |
1202 | if (etm->synth_opts.last_branch) { | |
1203 | dummy_bs = (struct dummy_branch_stack){ | |
1204 | .nr = 1, | |
1205 | .entries = { | |
1206 | .from = sample.ip, | |
1207 | .to = sample.addr, | |
1208 | }, | |
1209 | }; | |
1210 | sample.branch_stack = (struct branch_stack *)&dummy_bs; | |
1211 | } | |
1212 | ||
1213 | if (etm->synth_opts.inject) { | |
1214 | ret = cs_etm__inject_event(event, &sample, | |
1215 | etm->branches_sample_type); | |
1216 | if (ret) | |
1217 | return ret; | |
1218 | } | |
1219 | ||
b12235b1 MP |
1220 | ret = perf_session__deliver_synth_event(etm->session, event, &sample); |
1221 | ||
1222 | if (ret) | |
1223 | pr_err( | |
1224 | "CS ETM Trace: failed to deliver instruction event, error %d\n", | |
1225 | ret); | |
1226 | ||
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | struct cs_etm_synth { | |
1231 | struct perf_tool dummy_tool; | |
1232 | struct perf_session *session; | |
1233 | }; | |
1234 | ||
1235 | static int cs_etm__event_synth(struct perf_tool *tool, | |
1236 | union perf_event *event, | |
1237 | struct perf_sample *sample __maybe_unused, | |
1238 | struct machine *machine __maybe_unused) | |
1239 | { | |
1240 | struct cs_etm_synth *cs_etm_synth = | |
1241 | container_of(tool, struct cs_etm_synth, dummy_tool); | |
1242 | ||
1243 | return perf_session__deliver_synth_event(cs_etm_synth->session, | |
1244 | event, NULL); | |
1245 | } | |
1246 | ||
1247 | static int cs_etm__synth_event(struct perf_session *session, | |
1248 | struct perf_event_attr *attr, u64 id) | |
1249 | { | |
1250 | struct cs_etm_synth cs_etm_synth; | |
1251 | ||
1252 | memset(&cs_etm_synth, 0, sizeof(struct cs_etm_synth)); | |
1253 | cs_etm_synth.session = session; | |
1254 | ||
1255 | return perf_event__synthesize_attr(&cs_etm_synth.dummy_tool, attr, 1, | |
1256 | &id, cs_etm__event_synth); | |
1257 | } | |
1258 | ||
1259 | static int cs_etm__synth_events(struct cs_etm_auxtrace *etm, | |
1260 | struct perf_session *session) | |
1261 | { | |
63503dba | 1262 | struct evlist *evlist = session->evlist; |
32dcd021 | 1263 | struct evsel *evsel; |
b12235b1 MP |
1264 | struct perf_event_attr attr; |
1265 | bool found = false; | |
1266 | u64 id; | |
1267 | int err; | |
1268 | ||
1269 | evlist__for_each_entry(evlist, evsel) { | |
1fc632ce | 1270 | if (evsel->core.attr.type == etm->pmu_type) { |
b12235b1 MP |
1271 | found = true; |
1272 | break; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | if (!found) { | |
1277 | pr_debug("No selected events with CoreSight Trace data\n"); | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | memset(&attr, 0, sizeof(struct perf_event_attr)); | |
1282 | attr.size = sizeof(struct perf_event_attr); | |
1283 | attr.type = PERF_TYPE_HARDWARE; | |
1fc632ce | 1284 | attr.sample_type = evsel->core.attr.sample_type & PERF_SAMPLE_MASK; |
b12235b1 MP |
1285 | attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | |
1286 | PERF_SAMPLE_PERIOD; | |
1287 | if (etm->timeless_decoding) | |
1288 | attr.sample_type &= ~(u64)PERF_SAMPLE_TIME; | |
1289 | else | |
1290 | attr.sample_type |= PERF_SAMPLE_TIME; | |
1291 | ||
1fc632ce JO |
1292 | attr.exclude_user = evsel->core.attr.exclude_user; |
1293 | attr.exclude_kernel = evsel->core.attr.exclude_kernel; | |
1294 | attr.exclude_hv = evsel->core.attr.exclude_hv; | |
1295 | attr.exclude_host = evsel->core.attr.exclude_host; | |
1296 | attr.exclude_guest = evsel->core.attr.exclude_guest; | |
1297 | attr.sample_id_all = evsel->core.attr.sample_id_all; | |
1298 | attr.read_format = evsel->core.attr.read_format; | |
b12235b1 MP |
1299 | |
1300 | /* create new id val to be a fixed offset from evsel id */ | |
1301 | id = evsel->id[0] + 1000000000; | |
1302 | ||
1303 | if (!id) | |
1304 | id = 1; | |
1305 | ||
1306 | if (etm->synth_opts.branches) { | |
1307 | attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; | |
1308 | attr.sample_period = 1; | |
1309 | attr.sample_type |= PERF_SAMPLE_ADDR; | |
1310 | err = cs_etm__synth_event(session, &attr, id); | |
1311 | if (err) | |
1312 | return err; | |
1313 | etm->sample_branches = true; | |
1314 | etm->branches_sample_type = attr.sample_type; | |
1315 | etm->branches_id = id; | |
e573e978 RW |
1316 | id += 1; |
1317 | attr.sample_type &= ~(u64)PERF_SAMPLE_ADDR; | |
1318 | } | |
1319 | ||
1320 | if (etm->synth_opts.last_branch) | |
1321 | attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; | |
1322 | ||
1323 | if (etm->synth_opts.instructions) { | |
1324 | attr.config = PERF_COUNT_HW_INSTRUCTIONS; | |
1325 | attr.sample_period = etm->synth_opts.period; | |
1326 | etm->instructions_sample_period = attr.sample_period; | |
1327 | err = cs_etm__synth_event(session, &attr, id); | |
1328 | if (err) | |
1329 | return err; | |
1330 | etm->sample_instructions = true; | |
1331 | etm->instructions_sample_type = attr.sample_type; | |
1332 | etm->instructions_id = id; | |
1333 | id += 1; | |
b12235b1 MP |
1334 | } |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 | ||
c7bfa2fd MP |
1339 | static int cs_etm__sample(struct cs_etm_queue *etmq, |
1340 | struct cs_etm_traceid_queue *tidq) | |
b12235b1 | 1341 | { |
e573e978 RW |
1342 | struct cs_etm_auxtrace *etm = etmq->etm; |
1343 | struct cs_etm_packet *tmp; | |
b12235b1 | 1344 | int ret; |
af21577c | 1345 | u8 trace_chan_id = tidq->trace_chan_id; |
c7bfa2fd | 1346 | u64 instrs_executed = tidq->packet->instr_count; |
b12235b1 | 1347 | |
c7bfa2fd | 1348 | tidq->period_instructions += instrs_executed; |
e573e978 RW |
1349 | |
1350 | /* | |
1351 | * Record a branch when the last instruction in | |
1352 | * PREV_PACKET is a branch. | |
1353 | */ | |
1354 | if (etm->synth_opts.last_branch && | |
c7bfa2fd MP |
1355 | tidq->prev_packet->sample_type == CS_ETM_RANGE && |
1356 | tidq->prev_packet->last_instr_taken_branch) | |
1357 | cs_etm__update_last_branch_rb(etmq, tidq); | |
e573e978 RW |
1358 | |
1359 | if (etm->sample_instructions && | |
c7bfa2fd | 1360 | tidq->period_instructions >= etm->instructions_sample_period) { |
e573e978 RW |
1361 | /* |
1362 | * Emit instruction sample periodically | |
1363 | * TODO: allow period to be defined in cycles and clock time | |
1364 | */ | |
1365 | ||
1366 | /* Get number of instructions executed after the sample point */ | |
c7bfa2fd | 1367 | u64 instrs_over = tidq->period_instructions - |
e573e978 RW |
1368 | etm->instructions_sample_period; |
1369 | ||
1370 | /* | |
1371 | * Calculate the address of the sampled instruction (-1 as | |
1372 | * sample is reported as though instruction has just been | |
1373 | * executed, but PC has not advanced to next instruction) | |
1374 | */ | |
1375 | u64 offset = (instrs_executed - instrs_over - 1); | |
af21577c MP |
1376 | u64 addr = cs_etm__instr_addr(etmq, trace_chan_id, |
1377 | tidq->packet, offset); | |
e573e978 RW |
1378 | |
1379 | ret = cs_etm__synth_instruction_sample( | |
c7bfa2fd | 1380 | etmq, tidq, addr, etm->instructions_sample_period); |
e573e978 RW |
1381 | if (ret) |
1382 | return ret; | |
1383 | ||
1384 | /* Carry remaining instructions into next sample period */ | |
c7bfa2fd | 1385 | tidq->period_instructions = instrs_over; |
e573e978 RW |
1386 | } |
1387 | ||
cf0c37b6 | 1388 | if (etm->sample_branches) { |
14a85b1e LY |
1389 | bool generate_sample = false; |
1390 | ||
1391 | /* Generate sample for tracing on packet */ | |
c7bfa2fd | 1392 | if (tidq->prev_packet->sample_type == CS_ETM_DISCONTINUITY) |
14a85b1e LY |
1393 | generate_sample = true; |
1394 | ||
1395 | /* Generate sample for branch taken packet */ | |
c7bfa2fd MP |
1396 | if (tidq->prev_packet->sample_type == CS_ETM_RANGE && |
1397 | tidq->prev_packet->last_instr_taken_branch) | |
14a85b1e LY |
1398 | generate_sample = true; |
1399 | ||
1400 | if (generate_sample) { | |
c7bfa2fd | 1401 | ret = cs_etm__synth_branch_sample(etmq, tidq); |
14a85b1e LY |
1402 | if (ret) |
1403 | return ret; | |
1404 | } | |
e573e978 | 1405 | } |
b12235b1 | 1406 | |
e573e978 | 1407 | if (etm->sample_branches || etm->synth_opts.last_branch) { |
b12235b1 | 1408 | /* |
e573e978 RW |
1409 | * Swap PACKET with PREV_PACKET: PACKET becomes PREV_PACKET for |
1410 | * the next incoming packet. | |
b12235b1 | 1411 | */ |
c7bfa2fd MP |
1412 | tmp = tidq->packet; |
1413 | tidq->packet = tidq->prev_packet; | |
1414 | tidq->prev_packet = tmp; | |
b12235b1 MP |
1415 | } |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
c7bfa2fd | 1420 | static int cs_etm__exception(struct cs_etm_traceid_queue *tidq) |
7100b12c LY |
1421 | { |
1422 | /* | |
1423 | * When the exception packet is inserted, whether the last instruction | |
1424 | * in previous range packet is taken branch or not, we need to force | |
1425 | * to set 'prev_packet->last_instr_taken_branch' to true. This ensures | |
1426 | * to generate branch sample for the instruction range before the | |
1427 | * exception is trapped to kernel or before the exception returning. | |
1428 | * | |
1429 | * The exception packet includes the dummy address values, so don't | |
1430 | * swap PACKET with PREV_PACKET. This keeps PREV_PACKET to be useful | |
1431 | * for generating instruction and branch samples. | |
1432 | */ | |
c7bfa2fd MP |
1433 | if (tidq->prev_packet->sample_type == CS_ETM_RANGE) |
1434 | tidq->prev_packet->last_instr_taken_branch = true; | |
7100b12c LY |
1435 | |
1436 | return 0; | |
1437 | } | |
1438 | ||
c7bfa2fd MP |
1439 | static int cs_etm__flush(struct cs_etm_queue *etmq, |
1440 | struct cs_etm_traceid_queue *tidq) | |
256e751c RW |
1441 | { |
1442 | int err = 0; | |
d603b4e9 | 1443 | struct cs_etm_auxtrace *etm = etmq->etm; |
256e751c RW |
1444 | struct cs_etm_packet *tmp; |
1445 | ||
3eb3e07b | 1446 | /* Handle start tracing packet */ |
c7bfa2fd | 1447 | if (tidq->prev_packet->sample_type == CS_ETM_EMPTY) |
3eb3e07b LY |
1448 | goto swap_packet; |
1449 | ||
256e751c | 1450 | if (etmq->etm->synth_opts.last_branch && |
c7bfa2fd | 1451 | tidq->prev_packet->sample_type == CS_ETM_RANGE) { |
256e751c RW |
1452 | /* |
1453 | * Generate a last branch event for the branches left in the | |
1454 | * circular buffer at the end of the trace. | |
1455 | * | |
1456 | * Use the address of the end of the last reported execution | |
1457 | * range | |
1458 | */ | |
c7bfa2fd | 1459 | u64 addr = cs_etm__last_executed_instr(tidq->prev_packet); |
256e751c RW |
1460 | |
1461 | err = cs_etm__synth_instruction_sample( | |
c7bfa2fd MP |
1462 | etmq, tidq, addr, |
1463 | tidq->period_instructions); | |
6cd4ac6a LY |
1464 | if (err) |
1465 | return err; | |
1466 | ||
c7bfa2fd | 1467 | tidq->period_instructions = 0; |
256e751c | 1468 | |
3eb3e07b LY |
1469 | } |
1470 | ||
d603b4e9 | 1471 | if (etm->sample_branches && |
c7bfa2fd MP |
1472 | tidq->prev_packet->sample_type == CS_ETM_RANGE) { |
1473 | err = cs_etm__synth_branch_sample(etmq, tidq); | |
d603b4e9 LY |
1474 | if (err) |
1475 | return err; | |
1476 | } | |
1477 | ||
3eb3e07b | 1478 | swap_packet: |
43fd5666 | 1479 | if (etm->sample_branches || etm->synth_opts.last_branch) { |
256e751c RW |
1480 | /* |
1481 | * Swap PACKET with PREV_PACKET: PACKET becomes PREV_PACKET for | |
1482 | * the next incoming packet. | |
1483 | */ | |
c7bfa2fd MP |
1484 | tmp = tidq->packet; |
1485 | tidq->packet = tidq->prev_packet; | |
1486 | tidq->prev_packet = tmp; | |
256e751c RW |
1487 | } |
1488 | ||
1489 | return err; | |
1490 | } | |
1491 | ||
c7bfa2fd MP |
1492 | static int cs_etm__end_block(struct cs_etm_queue *etmq, |
1493 | struct cs_etm_traceid_queue *tidq) | |
24fff5eb LY |
1494 | { |
1495 | int err; | |
1496 | ||
1497 | /* | |
1498 | * It has no new packet coming and 'etmq->packet' contains the stale | |
1499 | * packet which was set at the previous time with packets swapping; | |
1500 | * so skip to generate branch sample to avoid stale packet. | |
1501 | * | |
1502 | * For this case only flush branch stack and generate a last branch | |
1503 | * event for the branches left in the circular buffer at the end of | |
1504 | * the trace. | |
1505 | */ | |
1506 | if (etmq->etm->synth_opts.last_branch && | |
c7bfa2fd | 1507 | tidq->prev_packet->sample_type == CS_ETM_RANGE) { |
24fff5eb LY |
1508 | /* |
1509 | * Use the address of the end of the last reported execution | |
1510 | * range. | |
1511 | */ | |
c7bfa2fd | 1512 | u64 addr = cs_etm__last_executed_instr(tidq->prev_packet); |
24fff5eb LY |
1513 | |
1514 | err = cs_etm__synth_instruction_sample( | |
c7bfa2fd MP |
1515 | etmq, tidq, addr, |
1516 | tidq->period_instructions); | |
24fff5eb LY |
1517 | if (err) |
1518 | return err; | |
1519 | ||
c7bfa2fd | 1520 | tidq->period_instructions = 0; |
24fff5eb LY |
1521 | } |
1522 | ||
1523 | return 0; | |
1524 | } | |
8224531c MP |
1525 | /* |
1526 | * cs_etm__get_data_block: Fetch a block from the auxtrace_buffer queue | |
1527 | * if need be. | |
1528 | * Returns: < 0 if error | |
1529 | * = 0 if no more auxtrace_buffer to read | |
1530 | * > 0 if the current buffer isn't empty yet | |
1531 | */ | |
1532 | static int cs_etm__get_data_block(struct cs_etm_queue *etmq) | |
1533 | { | |
1534 | int ret; | |
1535 | ||
1536 | if (!etmq->buf_len) { | |
1537 | ret = cs_etm__get_trace(etmq); | |
1538 | if (ret <= 0) | |
1539 | return ret; | |
1540 | /* | |
1541 | * We cannot assume consecutive blocks in the data file | |
1542 | * are contiguous, reset the decoder to force re-sync. | |
1543 | */ | |
1544 | ret = cs_etm_decoder__reset(etmq->decoder); | |
1545 | if (ret) | |
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | return etmq->buf_len; | |
1550 | } | |
24fff5eb | 1551 | |
af21577c | 1552 | static bool cs_etm__is_svc_instr(struct cs_etm_queue *etmq, u8 trace_chan_id, |
96dce7f4 LY |
1553 | struct cs_etm_packet *packet, |
1554 | u64 end_addr) | |
1555 | { | |
c152d4d4 MP |
1556 | /* Initialise to keep compiler happy */ |
1557 | u16 instr16 = 0; | |
1558 | u32 instr32 = 0; | |
96dce7f4 LY |
1559 | u64 addr; |
1560 | ||
1561 | switch (packet->isa) { | |
1562 | case CS_ETM_ISA_T32: | |
1563 | /* | |
1564 | * The SVC of T32 is defined in ARM DDI 0487D.a, F5.1.247: | |
1565 | * | |
1566 | * b'15 b'8 | |
1567 | * +-----------------+--------+ | |
1568 | * | 1 1 0 1 1 1 1 1 | imm8 | | |
1569 | * +-----------------+--------+ | |
1570 | * | |
1571 | * According to the specifiction, it only defines SVC for T32 | |
1572 | * with 16 bits instruction and has no definition for 32bits; | |
1573 | * so below only read 2 bytes as instruction size for T32. | |
1574 | */ | |
1575 | addr = end_addr - 2; | |
af21577c MP |
1576 | cs_etm__mem_access(etmq, trace_chan_id, addr, |
1577 | sizeof(instr16), (u8 *)&instr16); | |
96dce7f4 LY |
1578 | if ((instr16 & 0xFF00) == 0xDF00) |
1579 | return true; | |
1580 | ||
1581 | break; | |
1582 | case CS_ETM_ISA_A32: | |
1583 | /* | |
1584 | * The SVC of A32 is defined in ARM DDI 0487D.a, F5.1.247: | |
1585 | * | |
1586 | * b'31 b'28 b'27 b'24 | |
1587 | * +---------+---------+-------------------------+ | |
1588 | * | !1111 | 1 1 1 1 | imm24 | | |
1589 | * +---------+---------+-------------------------+ | |
1590 | */ | |
1591 | addr = end_addr - 4; | |
af21577c MP |
1592 | cs_etm__mem_access(etmq, trace_chan_id, addr, |
1593 | sizeof(instr32), (u8 *)&instr32); | |
96dce7f4 LY |
1594 | if ((instr32 & 0x0F000000) == 0x0F000000 && |
1595 | (instr32 & 0xF0000000) != 0xF0000000) | |
1596 | return true; | |
1597 | ||
1598 | break; | |
1599 | case CS_ETM_ISA_A64: | |
1600 | /* | |
1601 | * The SVC of A64 is defined in ARM DDI 0487D.a, C6.2.294: | |
1602 | * | |
1603 | * b'31 b'21 b'4 b'0 | |
1604 | * +-----------------------+---------+-----------+ | |
1605 | * | 1 1 0 1 0 1 0 0 0 0 0 | imm16 | 0 0 0 0 1 | | |
1606 | * +-----------------------+---------+-----------+ | |
1607 | */ | |
1608 | addr = end_addr - 4; | |
af21577c MP |
1609 | cs_etm__mem_access(etmq, trace_chan_id, addr, |
1610 | sizeof(instr32), (u8 *)&instr32); | |
96dce7f4 LY |
1611 | if ((instr32 & 0xFFE0001F) == 0xd4000001) |
1612 | return true; | |
1613 | ||
1614 | break; | |
1615 | case CS_ETM_ISA_UNKNOWN: | |
1616 | default: | |
1617 | break; | |
1618 | } | |
1619 | ||
1620 | return false; | |
1621 | } | |
1622 | ||
c7bfa2fd MP |
1623 | static bool cs_etm__is_syscall(struct cs_etm_queue *etmq, |
1624 | struct cs_etm_traceid_queue *tidq, u64 magic) | |
96dce7f4 | 1625 | { |
af21577c | 1626 | u8 trace_chan_id = tidq->trace_chan_id; |
c7bfa2fd MP |
1627 | struct cs_etm_packet *packet = tidq->packet; |
1628 | struct cs_etm_packet *prev_packet = tidq->prev_packet; | |
96dce7f4 LY |
1629 | |
1630 | if (magic == __perf_cs_etmv3_magic) | |
1631 | if (packet->exception_number == CS_ETMV3_EXC_SVC) | |
1632 | return true; | |
1633 | ||
1634 | /* | |
1635 | * ETMv4 exception type CS_ETMV4_EXC_CALL covers SVC, SMC and | |
1636 | * HVC cases; need to check if it's SVC instruction based on | |
1637 | * packet address. | |
1638 | */ | |
1639 | if (magic == __perf_cs_etmv4_magic) { | |
1640 | if (packet->exception_number == CS_ETMV4_EXC_CALL && | |
af21577c | 1641 | cs_etm__is_svc_instr(etmq, trace_chan_id, prev_packet, |
96dce7f4 LY |
1642 | prev_packet->end_addr)) |
1643 | return true; | |
1644 | } | |
1645 | ||
1646 | return false; | |
1647 | } | |
1648 | ||
c7bfa2fd MP |
1649 | static bool cs_etm__is_async_exception(struct cs_etm_traceid_queue *tidq, |
1650 | u64 magic) | |
96dce7f4 | 1651 | { |
c7bfa2fd | 1652 | struct cs_etm_packet *packet = tidq->packet; |
96dce7f4 LY |
1653 | |
1654 | if (magic == __perf_cs_etmv3_magic) | |
1655 | if (packet->exception_number == CS_ETMV3_EXC_DEBUG_HALT || | |
1656 | packet->exception_number == CS_ETMV3_EXC_ASYNC_DATA_ABORT || | |
1657 | packet->exception_number == CS_ETMV3_EXC_PE_RESET || | |
1658 | packet->exception_number == CS_ETMV3_EXC_IRQ || | |
1659 | packet->exception_number == CS_ETMV3_EXC_FIQ) | |
1660 | return true; | |
1661 | ||
1662 | if (magic == __perf_cs_etmv4_magic) | |
1663 | if (packet->exception_number == CS_ETMV4_EXC_RESET || | |
1664 | packet->exception_number == CS_ETMV4_EXC_DEBUG_HALT || | |
1665 | packet->exception_number == CS_ETMV4_EXC_SYSTEM_ERROR || | |
1666 | packet->exception_number == CS_ETMV4_EXC_INST_DEBUG || | |
1667 | packet->exception_number == CS_ETMV4_EXC_DATA_DEBUG || | |
1668 | packet->exception_number == CS_ETMV4_EXC_IRQ || | |
1669 | packet->exception_number == CS_ETMV4_EXC_FIQ) | |
1670 | return true; | |
1671 | ||
1672 | return false; | |
1673 | } | |
1674 | ||
c7bfa2fd MP |
1675 | static bool cs_etm__is_sync_exception(struct cs_etm_queue *etmq, |
1676 | struct cs_etm_traceid_queue *tidq, | |
1677 | u64 magic) | |
96dce7f4 | 1678 | { |
af21577c | 1679 | u8 trace_chan_id = tidq->trace_chan_id; |
c7bfa2fd MP |
1680 | struct cs_etm_packet *packet = tidq->packet; |
1681 | struct cs_etm_packet *prev_packet = tidq->prev_packet; | |
96dce7f4 LY |
1682 | |
1683 | if (magic == __perf_cs_etmv3_magic) | |
1684 | if (packet->exception_number == CS_ETMV3_EXC_SMC || | |
1685 | packet->exception_number == CS_ETMV3_EXC_HYP || | |
1686 | packet->exception_number == CS_ETMV3_EXC_JAZELLE_THUMBEE || | |
1687 | packet->exception_number == CS_ETMV3_EXC_UNDEFINED_INSTR || | |
1688 | packet->exception_number == CS_ETMV3_EXC_PREFETCH_ABORT || | |
1689 | packet->exception_number == CS_ETMV3_EXC_DATA_FAULT || | |
1690 | packet->exception_number == CS_ETMV3_EXC_GENERIC) | |
1691 | return true; | |
1692 | ||
1693 | if (magic == __perf_cs_etmv4_magic) { | |
1694 | if (packet->exception_number == CS_ETMV4_EXC_TRAP || | |
1695 | packet->exception_number == CS_ETMV4_EXC_ALIGNMENT || | |
1696 | packet->exception_number == CS_ETMV4_EXC_INST_FAULT || | |
1697 | packet->exception_number == CS_ETMV4_EXC_DATA_FAULT) | |
1698 | return true; | |
1699 | ||
1700 | /* | |
1701 | * For CS_ETMV4_EXC_CALL, except SVC other instructions | |
1702 | * (SMC, HVC) are taken as sync exceptions. | |
1703 | */ | |
1704 | if (packet->exception_number == CS_ETMV4_EXC_CALL && | |
af21577c | 1705 | !cs_etm__is_svc_instr(etmq, trace_chan_id, prev_packet, |
96dce7f4 LY |
1706 | prev_packet->end_addr)) |
1707 | return true; | |
1708 | ||
1709 | /* | |
1710 | * ETMv4 has 5 bits for exception number; if the numbers | |
1711 | * are in the range ( CS_ETMV4_EXC_FIQ, CS_ETMV4_EXC_END ] | |
1712 | * they are implementation defined exceptions. | |
1713 | * | |
1714 | * For this case, simply take it as sync exception. | |
1715 | */ | |
1716 | if (packet->exception_number > CS_ETMV4_EXC_FIQ && | |
1717 | packet->exception_number <= CS_ETMV4_EXC_END) | |
1718 | return true; | |
1719 | } | |
1720 | ||
1721 | return false; | |
1722 | } | |
1723 | ||
c7bfa2fd MP |
1724 | static int cs_etm__set_sample_flags(struct cs_etm_queue *etmq, |
1725 | struct cs_etm_traceid_queue *tidq) | |
06220bf4 | 1726 | { |
c7bfa2fd MP |
1727 | struct cs_etm_packet *packet = tidq->packet; |
1728 | struct cs_etm_packet *prev_packet = tidq->prev_packet; | |
af21577c | 1729 | u8 trace_chan_id = tidq->trace_chan_id; |
96dce7f4 LY |
1730 | u64 magic; |
1731 | int ret; | |
06220bf4 LY |
1732 | |
1733 | switch (packet->sample_type) { | |
1734 | case CS_ETM_RANGE: | |
1735 | /* | |
1736 | * Immediate branch instruction without neither link nor | |
1737 | * return flag, it's normal branch instruction within | |
1738 | * the function. | |
1739 | */ | |
1740 | if (packet->last_instr_type == OCSD_INSTR_BR && | |
1741 | packet->last_instr_subtype == OCSD_S_INSTR_NONE) { | |
1742 | packet->flags = PERF_IP_FLAG_BRANCH; | |
1743 | ||
1744 | if (packet->last_instr_cond) | |
1745 | packet->flags |= PERF_IP_FLAG_CONDITIONAL; | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * Immediate branch instruction with link (e.g. BL), this is | |
1750 | * branch instruction for function call. | |
1751 | */ | |
1752 | if (packet->last_instr_type == OCSD_INSTR_BR && | |
1753 | packet->last_instr_subtype == OCSD_S_INSTR_BR_LINK) | |
1754 | packet->flags = PERF_IP_FLAG_BRANCH | | |
1755 | PERF_IP_FLAG_CALL; | |
1756 | ||
1757 | /* | |
1758 | * Indirect branch instruction with link (e.g. BLR), this is | |
1759 | * branch instruction for function call. | |
1760 | */ | |
1761 | if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT && | |
1762 | packet->last_instr_subtype == OCSD_S_INSTR_BR_LINK) | |
1763 | packet->flags = PERF_IP_FLAG_BRANCH | | |
1764 | PERF_IP_FLAG_CALL; | |
1765 | ||
1766 | /* | |
1767 | * Indirect branch instruction with subtype of | |
1768 | * OCSD_S_INSTR_V7_IMPLIED_RET, this is explicit hint for | |
1769 | * function return for A32/T32. | |
1770 | */ | |
1771 | if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT && | |
1772 | packet->last_instr_subtype == OCSD_S_INSTR_V7_IMPLIED_RET) | |
1773 | packet->flags = PERF_IP_FLAG_BRANCH | | |
1774 | PERF_IP_FLAG_RETURN; | |
1775 | ||
1776 | /* | |
1777 | * Indirect branch instruction without link (e.g. BR), usually | |
1778 | * this is used for function return, especially for functions | |
1779 | * within dynamic link lib. | |
1780 | */ | |
1781 | if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT && | |
1782 | packet->last_instr_subtype == OCSD_S_INSTR_NONE) | |
1783 | packet->flags = PERF_IP_FLAG_BRANCH | | |
1784 | PERF_IP_FLAG_RETURN; | |
1785 | ||
1786 | /* Return instruction for function return. */ | |
1787 | if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT && | |
1788 | packet->last_instr_subtype == OCSD_S_INSTR_V8_RET) | |
1789 | packet->flags = PERF_IP_FLAG_BRANCH | | |
1790 | PERF_IP_FLAG_RETURN; | |
465eaaa8 LY |
1791 | |
1792 | /* | |
1793 | * Decoder might insert a discontinuity in the middle of | |
1794 | * instruction packets, fixup prev_packet with flag | |
1795 | * PERF_IP_FLAG_TRACE_BEGIN to indicate restarting trace. | |
1796 | */ | |
1797 | if (prev_packet->sample_type == CS_ETM_DISCONTINUITY) | |
1798 | prev_packet->flags |= PERF_IP_FLAG_BRANCH | | |
1799 | PERF_IP_FLAG_TRACE_BEGIN; | |
173e65f6 LY |
1800 | |
1801 | /* | |
1802 | * If the previous packet is an exception return packet | |
1803 | * and the return address just follows SVC instuction, | |
1804 | * it needs to calibrate the previous packet sample flags | |
1805 | * as PERF_IP_FLAG_SYSCALLRET. | |
1806 | */ | |
1807 | if (prev_packet->flags == (PERF_IP_FLAG_BRANCH | | |
1808 | PERF_IP_FLAG_RETURN | | |
1809 | PERF_IP_FLAG_INTERRUPT) && | |
af21577c MP |
1810 | cs_etm__is_svc_instr(etmq, trace_chan_id, |
1811 | packet, packet->start_addr)) | |
173e65f6 LY |
1812 | prev_packet->flags = PERF_IP_FLAG_BRANCH | |
1813 | PERF_IP_FLAG_RETURN | | |
1814 | PERF_IP_FLAG_SYSCALLRET; | |
06220bf4 LY |
1815 | break; |
1816 | case CS_ETM_DISCONTINUITY: | |
465eaaa8 LY |
1817 | /* |
1818 | * The trace is discontinuous, if the previous packet is | |
1819 | * instruction packet, set flag PERF_IP_FLAG_TRACE_END | |
1820 | * for previous packet. | |
1821 | */ | |
1822 | if (prev_packet->sample_type == CS_ETM_RANGE) | |
1823 | prev_packet->flags |= PERF_IP_FLAG_BRANCH | | |
1824 | PERF_IP_FLAG_TRACE_END; | |
1825 | break; | |
06220bf4 | 1826 | case CS_ETM_EXCEPTION: |
96dce7f4 LY |
1827 | ret = cs_etm__get_magic(packet->trace_chan_id, &magic); |
1828 | if (ret) | |
1829 | return ret; | |
1830 | ||
1831 | /* The exception is for system call. */ | |
c7bfa2fd | 1832 | if (cs_etm__is_syscall(etmq, tidq, magic)) |
96dce7f4 LY |
1833 | packet->flags = PERF_IP_FLAG_BRANCH | |
1834 | PERF_IP_FLAG_CALL | | |
1835 | PERF_IP_FLAG_SYSCALLRET; | |
1836 | /* | |
1837 | * The exceptions are triggered by external signals from bus, | |
1838 | * interrupt controller, debug module, PE reset or halt. | |
1839 | */ | |
c7bfa2fd | 1840 | else if (cs_etm__is_async_exception(tidq, magic)) |
96dce7f4 LY |
1841 | packet->flags = PERF_IP_FLAG_BRANCH | |
1842 | PERF_IP_FLAG_CALL | | |
1843 | PERF_IP_FLAG_ASYNC | | |
1844 | PERF_IP_FLAG_INTERRUPT; | |
1845 | /* | |
1846 | * Otherwise, exception is caused by trap, instruction & | |
1847 | * data fault, or alignment errors. | |
1848 | */ | |
c7bfa2fd | 1849 | else if (cs_etm__is_sync_exception(etmq, tidq, magic)) |
96dce7f4 LY |
1850 | packet->flags = PERF_IP_FLAG_BRANCH | |
1851 | PERF_IP_FLAG_CALL | | |
1852 | PERF_IP_FLAG_INTERRUPT; | |
1853 | ||
1854 | /* | |
1855 | * When the exception packet is inserted, since exception | |
1856 | * packet is not used standalone for generating samples | |
1857 | * and it's affiliation to the previous instruction range | |
1858 | * packet; so set previous range packet flags to tell perf | |
1859 | * it is an exception taken branch. | |
1860 | */ | |
1861 | if (prev_packet->sample_type == CS_ETM_RANGE) | |
1862 | prev_packet->flags = packet->flags; | |
1863 | break; | |
06220bf4 | 1864 | case CS_ETM_EXCEPTION_RET: |
173e65f6 LY |
1865 | /* |
1866 | * When the exception return packet is inserted, since | |
1867 | * exception return packet is not used standalone for | |
1868 | * generating samples and it's affiliation to the previous | |
1869 | * instruction range packet; so set previous range packet | |
1870 | * flags to tell perf it is an exception return branch. | |
1871 | * | |
1872 | * The exception return can be for either system call or | |
1873 | * other exception types; unfortunately the packet doesn't | |
1874 | * contain exception type related info so we cannot decide | |
1875 | * the exception type purely based on exception return packet. | |
1876 | * If we record the exception number from exception packet and | |
1877 | * reuse it for excpetion return packet, this is not reliable | |
1878 | * due the trace can be discontinuity or the interrupt can | |
1879 | * be nested, thus the recorded exception number cannot be | |
1880 | * used for exception return packet for these two cases. | |
1881 | * | |
1882 | * For exception return packet, we only need to distinguish the | |
1883 | * packet is for system call or for other types. Thus the | |
1884 | * decision can be deferred when receive the next packet which | |
1885 | * contains the return address, based on the return address we | |
1886 | * can read out the previous instruction and check if it's a | |
1887 | * system call instruction and then calibrate the sample flag | |
1888 | * as needed. | |
1889 | */ | |
1890 | if (prev_packet->sample_type == CS_ETM_RANGE) | |
1891 | prev_packet->flags = PERF_IP_FLAG_BRANCH | | |
1892 | PERF_IP_FLAG_RETURN | | |
1893 | PERF_IP_FLAG_INTERRUPT; | |
1894 | break; | |
06220bf4 LY |
1895 | case CS_ETM_EMPTY: |
1896 | default: | |
1897 | break; | |
1898 | } | |
1899 | ||
1900 | return 0; | |
1901 | } | |
1902 | ||
f74f349c MP |
1903 | static int cs_etm__decode_data_block(struct cs_etm_queue *etmq) |
1904 | { | |
1905 | int ret = 0; | |
1906 | size_t processed = 0; | |
1907 | ||
1908 | /* | |
1909 | * Packets are decoded and added to the decoder's packet queue | |
1910 | * until the decoder packet processing callback has requested that | |
1911 | * processing stops or there is nothing left in the buffer. Normal | |
1912 | * operations that stop processing are a timestamp packet or a full | |
1913 | * decoder buffer queue. | |
1914 | */ | |
1915 | ret = cs_etm_decoder__process_data_block(etmq->decoder, | |
1916 | etmq->offset, | |
1917 | &etmq->buf[etmq->buf_used], | |
1918 | etmq->buf_len, | |
1919 | &processed); | |
1920 | if (ret) | |
1921 | goto out; | |
1922 | ||
1923 | etmq->offset += processed; | |
1924 | etmq->buf_used += processed; | |
1925 | etmq->buf_len -= processed; | |
1926 | ||
1927 | out: | |
1928 | return ret; | |
1929 | } | |
1930 | ||
c7bfa2fd MP |
1931 | static int cs_etm__process_traceid_queue(struct cs_etm_queue *etmq, |
1932 | struct cs_etm_traceid_queue *tidq) | |
3fa0e83e MP |
1933 | { |
1934 | int ret; | |
5f7cb035 MP |
1935 | struct cs_etm_packet_queue *packet_queue; |
1936 | ||
c7bfa2fd | 1937 | packet_queue = &tidq->packet_queue; |
3fa0e83e | 1938 | |
882f4874 MP |
1939 | /* Process each packet in this chunk */ |
1940 | while (1) { | |
1941 | ret = cs_etm_decoder__get_packet(packet_queue, | |
c7bfa2fd | 1942 | tidq->packet); |
882f4874 MP |
1943 | if (ret <= 0) |
1944 | /* | |
1945 | * Stop processing this chunk on | |
1946 | * end of data or error | |
1947 | */ | |
1948 | break; | |
3fa0e83e | 1949 | |
882f4874 MP |
1950 | /* |
1951 | * Since packet addresses are swapped in packet | |
1952 | * handling within below switch() statements, | |
1953 | * thus setting sample flags must be called | |
1954 | * prior to switch() statement to use address | |
1955 | * information before packets swapping. | |
1956 | */ | |
c7bfa2fd | 1957 | ret = cs_etm__set_sample_flags(etmq, tidq); |
882f4874 MP |
1958 | if (ret < 0) |
1959 | break; | |
1960 | ||
c7bfa2fd | 1961 | switch (tidq->packet->sample_type) { |
882f4874 MP |
1962 | case CS_ETM_RANGE: |
1963 | /* | |
1964 | * If the packet contains an instruction | |
1965 | * range, generate instruction sequence | |
1966 | * events. | |
1967 | */ | |
c7bfa2fd | 1968 | cs_etm__sample(etmq, tidq); |
882f4874 MP |
1969 | break; |
1970 | case CS_ETM_EXCEPTION: | |
1971 | case CS_ETM_EXCEPTION_RET: | |
3fa0e83e | 1972 | /* |
882f4874 MP |
1973 | * If the exception packet is coming, |
1974 | * make sure the previous instruction | |
1975 | * range packet to be handled properly. | |
3fa0e83e | 1976 | */ |
c7bfa2fd | 1977 | cs_etm__exception(tidq); |
882f4874 MP |
1978 | break; |
1979 | case CS_ETM_DISCONTINUITY: | |
1980 | /* | |
1981 | * Discontinuity in trace, flush | |
1982 | * previous branch stack | |
1983 | */ | |
c7bfa2fd | 1984 | cs_etm__flush(etmq, tidq); |
882f4874 MP |
1985 | break; |
1986 | case CS_ETM_EMPTY: | |
1987 | /* | |
1988 | * Should not receive empty packet, | |
1989 | * report error. | |
1990 | */ | |
1991 | pr_err("CS ETM Trace: empty packet\n"); | |
1992 | return -EINVAL; | |
1993 | default: | |
1994 | break; | |
3fa0e83e | 1995 | } |
882f4874 | 1996 | } |
3fa0e83e MP |
1997 | |
1998 | return ret; | |
1999 | } | |
2000 | ||
21fe8dc1 MP |
2001 | static void cs_etm__clear_all_traceid_queues(struct cs_etm_queue *etmq) |
2002 | { | |
2003 | int idx; | |
2004 | struct int_node *inode; | |
2005 | struct cs_etm_traceid_queue *tidq; | |
2006 | struct intlist *traceid_queues_list = etmq->traceid_queues_list; | |
2007 | ||
2008 | intlist__for_each_entry(inode, traceid_queues_list) { | |
2009 | idx = (int)(intptr_t)inode->priv; | |
2010 | tidq = etmq->traceid_queues[idx]; | |
2011 | ||
2012 | /* Ignore return value */ | |
2013 | cs_etm__process_traceid_queue(etmq, tidq); | |
2014 | ||
2015 | /* | |
2016 | * Generate an instruction sample with the remaining | |
2017 | * branchstack entries. | |
2018 | */ | |
2019 | cs_etm__flush(etmq, tidq); | |
2020 | } | |
2021 | } | |
2022 | ||
9f878b29 MP |
2023 | static int cs_etm__run_decoder(struct cs_etm_queue *etmq) |
2024 | { | |
9f878b29 | 2025 | int err = 0; |
c7bfa2fd MP |
2026 | struct cs_etm_traceid_queue *tidq; |
2027 | ||
2028 | tidq = cs_etm__etmq_get_traceid_queue(etmq, CS_ETM_PER_THREAD_TRACEID); | |
2029 | if (!tidq) | |
2030 | return -EINVAL; | |
9f878b29 | 2031 | |
9f878b29 | 2032 | /* Go through each buffer in the queue and decode them one by one */ |
e573e978 | 2033 | while (1) { |
8224531c MP |
2034 | err = cs_etm__get_data_block(etmq); |
2035 | if (err <= 0) | |
2036 | return err; | |
9f878b29 | 2037 | |
e573e978 RW |
2038 | /* Run trace decoder until buffer consumed or end of trace */ |
2039 | do { | |
f74f349c | 2040 | err = cs_etm__decode_data_block(etmq); |
e573e978 RW |
2041 | if (err) |
2042 | return err; | |
2043 | ||
3fa0e83e MP |
2044 | /* |
2045 | * Process each packet in this chunk, nothing to do if | |
2046 | * an error occurs other than hoping the next one will | |
2047 | * be better. | |
2048 | */ | |
c7bfa2fd | 2049 | err = cs_etm__process_traceid_queue(etmq, tidq); |
e573e978 | 2050 | |
23cfcd6d | 2051 | } while (etmq->buf_len); |
b12235b1 | 2052 | |
256e751c RW |
2053 | if (err == 0) |
2054 | /* Flush any remaining branch stack entries */ | |
c7bfa2fd | 2055 | err = cs_etm__end_block(etmq, tidq); |
e573e978 | 2056 | } |
9f878b29 MP |
2057 | |
2058 | return err; | |
2059 | } | |
2060 | ||
2061 | static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, | |
fc7ac413 | 2062 | pid_t tid) |
9f878b29 MP |
2063 | { |
2064 | unsigned int i; | |
2065 | struct auxtrace_queues *queues = &etm->queues; | |
2066 | ||
2067 | for (i = 0; i < queues->nr_queues; i++) { | |
2068 | struct auxtrace_queue *queue = &etm->queues.queue_array[i]; | |
2069 | struct cs_etm_queue *etmq = queue->priv; | |
0abb868b MP |
2070 | struct cs_etm_traceid_queue *tidq; |
2071 | ||
2072 | if (!etmq) | |
2073 | continue; | |
2074 | ||
2075 | tidq = cs_etm__etmq_get_traceid_queue(etmq, | |
2076 | CS_ETM_PER_THREAD_TRACEID); | |
2077 | ||
2078 | if (!tidq) | |
2079 | continue; | |
9f878b29 | 2080 | |
0abb868b | 2081 | if ((tid == -1) || (tidq->tid == tid)) { |
0a6be300 | 2082 | cs_etm__set_pid_tid_cpu(etm, tidq); |
9f878b29 MP |
2083 | cs_etm__run_decoder(etmq); |
2084 | } | |
2085 | } | |
2086 | ||
2087 | return 0; | |
2088 | } | |
2089 | ||
21fe8dc1 MP |
2090 | static int cs_etm__process_queues(struct cs_etm_auxtrace *etm) |
2091 | { | |
2092 | int ret = 0; | |
2093 | unsigned int cs_queue_nr, queue_nr; | |
2094 | u8 trace_chan_id; | |
2095 | u64 timestamp; | |
2096 | struct auxtrace_queue *queue; | |
2097 | struct cs_etm_queue *etmq; | |
2098 | struct cs_etm_traceid_queue *tidq; | |
2099 | ||
2100 | while (1) { | |
2101 | if (!etm->heap.heap_cnt) | |
2102 | goto out; | |
2103 | ||
2104 | /* Take the entry at the top of the min heap */ | |
2105 | cs_queue_nr = etm->heap.heap_array[0].queue_nr; | |
2106 | queue_nr = TO_QUEUE_NR(cs_queue_nr); | |
2107 | trace_chan_id = TO_TRACE_CHAN_ID(cs_queue_nr); | |
2108 | queue = &etm->queues.queue_array[queue_nr]; | |
2109 | etmq = queue->priv; | |
2110 | ||
2111 | /* | |
2112 | * Remove the top entry from the heap since we are about | |
2113 | * to process it. | |
2114 | */ | |
2115 | auxtrace_heap__pop(&etm->heap); | |
2116 | ||
2117 | tidq = cs_etm__etmq_get_traceid_queue(etmq, trace_chan_id); | |
2118 | if (!tidq) { | |
2119 | /* | |
2120 | * No traceID queue has been allocated for this traceID, | |
2121 | * which means something somewhere went very wrong. No | |
2122 | * other choice than simply exit. | |
2123 | */ | |
2124 | ret = -EINVAL; | |
2125 | goto out; | |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * Packets associated with this timestamp are already in | |
2130 | * the etmq's traceID queue, so process them. | |
2131 | */ | |
2132 | ret = cs_etm__process_traceid_queue(etmq, tidq); | |
2133 | if (ret < 0) | |
2134 | goto out; | |
2135 | ||
2136 | /* | |
2137 | * Packets for this timestamp have been processed, time to | |
2138 | * move on to the next timestamp, fetching a new auxtrace_buffer | |
2139 | * if need be. | |
2140 | */ | |
2141 | refetch: | |
2142 | ret = cs_etm__get_data_block(etmq); | |
2143 | if (ret < 0) | |
2144 | goto out; | |
2145 | ||
2146 | /* | |
2147 | * No more auxtrace_buffers to process in this etmq, simply | |
2148 | * move on to another entry in the auxtrace_heap. | |
2149 | */ | |
2150 | if (!ret) | |
2151 | continue; | |
2152 | ||
2153 | ret = cs_etm__decode_data_block(etmq); | |
2154 | if (ret) | |
2155 | goto out; | |
2156 | ||
2157 | timestamp = cs_etm__etmq_get_timestamp(etmq, &trace_chan_id); | |
2158 | ||
2159 | if (!timestamp) { | |
2160 | /* | |
2161 | * Function cs_etm__decode_data_block() returns when | |
2162 | * there is no more traces to decode in the current | |
2163 | * auxtrace_buffer OR when a timestamp has been | |
2164 | * encountered on any of the traceID queues. Since we | |
2165 | * did not get a timestamp, there is no more traces to | |
2166 | * process in this auxtrace_buffer. As such empty and | |
2167 | * flush all traceID queues. | |
2168 | */ | |
2169 | cs_etm__clear_all_traceid_queues(etmq); | |
2170 | ||
2171 | /* Fetch another auxtrace_buffer for this etmq */ | |
2172 | goto refetch; | |
2173 | } | |
2174 | ||
2175 | /* | |
2176 | * Add to the min heap the timestamp for packets that have | |
2177 | * just been decoded. They will be processed and synthesized | |
2178 | * during the next call to cs_etm__process_traceid_queue() for | |
2179 | * this queue/traceID. | |
2180 | */ | |
2181 | cs_queue_nr = TO_CS_QUEUE_NR(queue_nr, trace_chan_id); | |
2182 | ret = auxtrace_heap__add(&etm->heap, cs_queue_nr, timestamp); | |
2183 | } | |
2184 | ||
2185 | out: | |
2186 | return ret; | |
2187 | } | |
2188 | ||
a465f3c3 MP |
2189 | static int cs_etm__process_itrace_start(struct cs_etm_auxtrace *etm, |
2190 | union perf_event *event) | |
2191 | { | |
2192 | struct thread *th; | |
2193 | ||
2194 | if (etm->timeless_decoding) | |
2195 | return 0; | |
2196 | ||
2197 | /* | |
2198 | * Add the tid/pid to the log so that we can get a match when | |
2199 | * we get a contextID from the decoder. | |
2200 | */ | |
2201 | th = machine__findnew_thread(etm->machine, | |
2202 | event->itrace_start.pid, | |
2203 | event->itrace_start.tid); | |
2204 | if (!th) | |
2205 | return -ENOMEM; | |
2206 | ||
2207 | thread__put(th); | |
2208 | ||
2209 | return 0; | |
2210 | } | |
2211 | ||
e0d170fa MP |
2212 | static int cs_etm__process_switch_cpu_wide(struct cs_etm_auxtrace *etm, |
2213 | union perf_event *event) | |
2214 | { | |
2215 | struct thread *th; | |
2216 | bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; | |
2217 | ||
2218 | /* | |
2219 | * Context switch in per-thread mode are irrelevant since perf | |
2220 | * will start/stop tracing as the process is scheduled. | |
2221 | */ | |
2222 | if (etm->timeless_decoding) | |
2223 | return 0; | |
2224 | ||
2225 | /* | |
2226 | * SWITCH_IN events carry the next process to be switched out while | |
2227 | * SWITCH_OUT events carry the process to be switched in. As such | |
2228 | * we don't care about IN events. | |
2229 | */ | |
2230 | if (!out) | |
2231 | return 0; | |
2232 | ||
2233 | /* | |
2234 | * Add the tid/pid to the log so that we can get a match when | |
2235 | * we get a contextID from the decoder. | |
2236 | */ | |
2237 | th = machine__findnew_thread(etm->machine, | |
2238 | event->context_switch.next_prev_pid, | |
2239 | event->context_switch.next_prev_tid); | |
2240 | if (!th) | |
2241 | return -ENOMEM; | |
2242 | ||
2243 | thread__put(th); | |
2244 | ||
2245 | return 0; | |
2246 | } | |
2247 | ||
440a23b3 MP |
2248 | static int cs_etm__process_event(struct perf_session *session, |
2249 | union perf_event *event, | |
2250 | struct perf_sample *sample, | |
2251 | struct perf_tool *tool) | |
2252 | { | |
20d9c478 MP |
2253 | int err = 0; |
2254 | u64 timestamp; | |
2255 | struct cs_etm_auxtrace *etm = container_of(session->auxtrace, | |
2256 | struct cs_etm_auxtrace, | |
2257 | auxtrace); | |
2258 | ||
20d9c478 MP |
2259 | if (dump_trace) |
2260 | return 0; | |
2261 | ||
2262 | if (!tool->ordered_events) { | |
2263 | pr_err("CoreSight ETM Trace requires ordered events\n"); | |
2264 | return -EINVAL; | |
2265 | } | |
2266 | ||
20d9c478 MP |
2267 | if (sample->time && (sample->time != (u64) -1)) |
2268 | timestamp = sample->time; | |
2269 | else | |
2270 | timestamp = 0; | |
2271 | ||
2272 | if (timestamp || etm->timeless_decoding) { | |
2273 | err = cs_etm__update_queues(etm); | |
2274 | if (err) | |
2275 | return err; | |
2276 | } | |
2277 | ||
21fe8dc1 MP |
2278 | if (etm->timeless_decoding && |
2279 | event->header.type == PERF_RECORD_EXIT) | |
9f878b29 | 2280 | return cs_etm__process_timeless_queues(etm, |
fc7ac413 | 2281 | event->fork.tid); |
9f878b29 | 2282 | |
a465f3c3 MP |
2283 | if (event->header.type == PERF_RECORD_ITRACE_START) |
2284 | return cs_etm__process_itrace_start(etm, event); | |
e0d170fa MP |
2285 | else if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) |
2286 | return cs_etm__process_switch_cpu_wide(etm, event); | |
a465f3c3 | 2287 | |
21fe8dc1 MP |
2288 | if (!etm->timeless_decoding && |
2289 | event->header.type == PERF_RECORD_AUX) | |
2290 | return cs_etm__process_queues(etm); | |
2291 | ||
440a23b3 MP |
2292 | return 0; |
2293 | } | |
2294 | ||
2295 | static int cs_etm__process_auxtrace_event(struct perf_session *session, | |
2296 | union perf_event *event, | |
68ffe390 | 2297 | struct perf_tool *tool __maybe_unused) |
440a23b3 | 2298 | { |
68ffe390 MP |
2299 | struct cs_etm_auxtrace *etm = container_of(session->auxtrace, |
2300 | struct cs_etm_auxtrace, | |
2301 | auxtrace); | |
2302 | if (!etm->data_queued) { | |
2303 | struct auxtrace_buffer *buffer; | |
2304 | off_t data_offset; | |
2305 | int fd = perf_data__fd(session->data); | |
2306 | bool is_pipe = perf_data__is_pipe(session->data); | |
2307 | int err; | |
2308 | ||
2309 | if (is_pipe) | |
2310 | data_offset = 0; | |
2311 | else { | |
2312 | data_offset = lseek(fd, 0, SEEK_CUR); | |
2313 | if (data_offset == -1) | |
2314 | return -errno; | |
2315 | } | |
2316 | ||
2317 | err = auxtrace_queues__add_event(&etm->queues, session, | |
2318 | event, data_offset, &buffer); | |
2319 | if (err) | |
2320 | return err; | |
2321 | ||
2322 | if (dump_trace) | |
2323 | if (auxtrace_buffer__get_data(buffer, fd)) { | |
2324 | cs_etm__dump_event(etm, buffer); | |
2325 | auxtrace_buffer__put_data(buffer); | |
2326 | } | |
2327 | } | |
2328 | ||
440a23b3 MP |
2329 | return 0; |
2330 | } | |
2331 | ||
2332 | static bool cs_etm__is_timeless_decoding(struct cs_etm_auxtrace *etm) | |
2333 | { | |
32dcd021 | 2334 | struct evsel *evsel; |
63503dba | 2335 | struct evlist *evlist = etm->session->evlist; |
440a23b3 MP |
2336 | bool timeless_decoding = true; |
2337 | ||
2338 | /* | |
2339 | * Circle through the list of event and complain if we find one | |
2340 | * with the time bit set. | |
2341 | */ | |
2342 | evlist__for_each_entry(evlist, evsel) { | |
1fc632ce | 2343 | if ((evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) |
440a23b3 MP |
2344 | timeless_decoding = false; |
2345 | } | |
2346 | ||
2347 | return timeless_decoding; | |
2348 | } | |
2349 | ||
cd8bfd8c TJ |
2350 | static const char * const cs_etm_global_header_fmts[] = { |
2351 | [CS_HEADER_VERSION_0] = " Header version %llx\n", | |
2352 | [CS_PMU_TYPE_CPUS] = " PMU type/num cpus %llx\n", | |
2353 | [CS_ETM_SNAPSHOT] = " Snapshot %llx\n", | |
2354 | }; | |
2355 | ||
2356 | static const char * const cs_etm_priv_fmts[] = { | |
2357 | [CS_ETM_MAGIC] = " Magic number %llx\n", | |
2358 | [CS_ETM_CPU] = " CPU %lld\n", | |
2359 | [CS_ETM_ETMCR] = " ETMCR %llx\n", | |
2360 | [CS_ETM_ETMTRACEIDR] = " ETMTRACEIDR %llx\n", | |
2361 | [CS_ETM_ETMCCER] = " ETMCCER %llx\n", | |
2362 | [CS_ETM_ETMIDR] = " ETMIDR %llx\n", | |
2363 | }; | |
2364 | ||
2365 | static const char * const cs_etmv4_priv_fmts[] = { | |
2366 | [CS_ETM_MAGIC] = " Magic number %llx\n", | |
2367 | [CS_ETM_CPU] = " CPU %lld\n", | |
2368 | [CS_ETMV4_TRCCONFIGR] = " TRCCONFIGR %llx\n", | |
2369 | [CS_ETMV4_TRCTRACEIDR] = " TRCTRACEIDR %llx\n", | |
2370 | [CS_ETMV4_TRCIDR0] = " TRCIDR0 %llx\n", | |
2371 | [CS_ETMV4_TRCIDR1] = " TRCIDR1 %llx\n", | |
2372 | [CS_ETMV4_TRCIDR2] = " TRCIDR2 %llx\n", | |
2373 | [CS_ETMV4_TRCIDR8] = " TRCIDR8 %llx\n", | |
2374 | [CS_ETMV4_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n", | |
2375 | }; | |
2376 | ||
9a8dad04 | 2377 | static void cs_etm__print_auxtrace_info(__u64 *val, int num) |
cd8bfd8c TJ |
2378 | { |
2379 | int i, j, cpu = 0; | |
2380 | ||
2381 | for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++) | |
2382 | fprintf(stdout, cs_etm_global_header_fmts[i], val[i]); | |
2383 | ||
2384 | for (i = CS_HEADER_VERSION_0_MAX; cpu < num; cpu++) { | |
2385 | if (val[i] == __perf_cs_etmv3_magic) | |
2386 | for (j = 0; j < CS_ETM_PRIV_MAX; j++, i++) | |
2387 | fprintf(stdout, cs_etm_priv_fmts[j], val[i]); | |
2388 | else if (val[i] == __perf_cs_etmv4_magic) | |
2389 | for (j = 0; j < CS_ETMV4_PRIV_MAX; j++, i++) | |
2390 | fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]); | |
2391 | else | |
2392 | /* failure.. return */ | |
2393 | return; | |
2394 | } | |
2395 | } | |
2396 | ||
440a23b3 MP |
2397 | int cs_etm__process_auxtrace_info(union perf_event *event, |
2398 | struct perf_session *session) | |
2399 | { | |
72932371 | 2400 | struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; |
440a23b3 | 2401 | struct cs_etm_auxtrace *etm = NULL; |
cd8bfd8c TJ |
2402 | struct int_node *inode; |
2403 | unsigned int pmu_type; | |
440a23b3 MP |
2404 | int event_header_size = sizeof(struct perf_event_header); |
2405 | int info_header_size; | |
2406 | int total_size = auxtrace_info->header.size; | |
cd8bfd8c TJ |
2407 | int priv_size = 0; |
2408 | int num_cpu; | |
2409 | int err = 0, idx = -1; | |
2410 | int i, j, k; | |
2411 | u64 *ptr, *hdr = NULL; | |
2412 | u64 **metadata = NULL; | |
440a23b3 MP |
2413 | |
2414 | /* | |
2415 | * sizeof(auxtrace_info_event::type) + | |
2416 | * sizeof(auxtrace_info_event::reserved) == 8 | |
2417 | */ | |
2418 | info_header_size = 8; | |
2419 | ||
2420 | if (total_size < (event_header_size + info_header_size)) | |
2421 | return -EINVAL; | |
2422 | ||
cd8bfd8c TJ |
2423 | priv_size = total_size - event_header_size - info_header_size; |
2424 | ||
2425 | /* First the global part */ | |
2426 | ptr = (u64 *) auxtrace_info->priv; | |
2427 | ||
2428 | /* Look for version '0' of the header */ | |
2429 | if (ptr[0] != 0) | |
2430 | return -EINVAL; | |
2431 | ||
2432 | hdr = zalloc(sizeof(*hdr) * CS_HEADER_VERSION_0_MAX); | |
2433 | if (!hdr) | |
2434 | return -ENOMEM; | |
2435 | ||
2436 | /* Extract header information - see cs-etm.h for format */ | |
2437 | for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++) | |
2438 | hdr[i] = ptr[i]; | |
2439 | num_cpu = hdr[CS_PMU_TYPE_CPUS] & 0xffffffff; | |
2440 | pmu_type = (unsigned int) ((hdr[CS_PMU_TYPE_CPUS] >> 32) & | |
2441 | 0xffffffff); | |
2442 | ||
2443 | /* | |
95c6fe97 LY |
2444 | * Create an RB tree for traceID-metadata tuple. Since the conversion |
2445 | * has to be made for each packet that gets decoded, optimizing access | |
2446 | * in anything other than a sequential array is worth doing. | |
cd8bfd8c TJ |
2447 | */ |
2448 | traceid_list = intlist__new(NULL); | |
2449 | if (!traceid_list) { | |
2450 | err = -ENOMEM; | |
2451 | goto err_free_hdr; | |
2452 | } | |
2453 | ||
2454 | metadata = zalloc(sizeof(*metadata) * num_cpu); | |
2455 | if (!metadata) { | |
2456 | err = -ENOMEM; | |
2457 | goto err_free_traceid_list; | |
2458 | } | |
2459 | ||
2460 | /* | |
2461 | * The metadata is stored in the auxtrace_info section and encodes | |
2462 | * the configuration of the ARM embedded trace macrocell which is | |
2463 | * required by the trace decoder to properly decode the trace due | |
2464 | * to its highly compressed nature. | |
2465 | */ | |
2466 | for (j = 0; j < num_cpu; j++) { | |
2467 | if (ptr[i] == __perf_cs_etmv3_magic) { | |
2468 | metadata[j] = zalloc(sizeof(*metadata[j]) * | |
2469 | CS_ETM_PRIV_MAX); | |
2470 | if (!metadata[j]) { | |
2471 | err = -ENOMEM; | |
2472 | goto err_free_metadata; | |
2473 | } | |
2474 | for (k = 0; k < CS_ETM_PRIV_MAX; k++) | |
2475 | metadata[j][k] = ptr[i + k]; | |
2476 | ||
2477 | /* The traceID is our handle */ | |
2478 | idx = metadata[j][CS_ETM_ETMTRACEIDR]; | |
2479 | i += CS_ETM_PRIV_MAX; | |
2480 | } else if (ptr[i] == __perf_cs_etmv4_magic) { | |
2481 | metadata[j] = zalloc(sizeof(*metadata[j]) * | |
2482 | CS_ETMV4_PRIV_MAX); | |
2483 | if (!metadata[j]) { | |
2484 | err = -ENOMEM; | |
2485 | goto err_free_metadata; | |
2486 | } | |
2487 | for (k = 0; k < CS_ETMV4_PRIV_MAX; k++) | |
2488 | metadata[j][k] = ptr[i + k]; | |
2489 | ||
2490 | /* The traceID is our handle */ | |
2491 | idx = metadata[j][CS_ETMV4_TRCTRACEIDR]; | |
2492 | i += CS_ETMV4_PRIV_MAX; | |
2493 | } | |
2494 | ||
2495 | /* Get an RB node for this CPU */ | |
2496 | inode = intlist__findnew(traceid_list, idx); | |
2497 | ||
2498 | /* Something went wrong, no need to continue */ | |
2499 | if (!inode) { | |
edc82a99 | 2500 | err = -ENOMEM; |
cd8bfd8c TJ |
2501 | goto err_free_metadata; |
2502 | } | |
2503 | ||
2504 | /* | |
2505 | * The node for that CPU should not be taken. | |
2506 | * Back out if that's the case. | |
2507 | */ | |
2508 | if (inode->priv) { | |
2509 | err = -EINVAL; | |
2510 | goto err_free_metadata; | |
2511 | } | |
95c6fe97 LY |
2512 | /* All good, associate the traceID with the metadata pointer */ |
2513 | inode->priv = metadata[j]; | |
cd8bfd8c TJ |
2514 | } |
2515 | ||
2516 | /* | |
2517 | * Each of CS_HEADER_VERSION_0_MAX, CS_ETM_PRIV_MAX and | |
2518 | * CS_ETMV4_PRIV_MAX mark how many double words are in the | |
2519 | * global metadata, and each cpu's metadata respectively. | |
2520 | * The following tests if the correct number of double words was | |
2521 | * present in the auxtrace info section. | |
2522 | */ | |
2523 | if (i * 8 != priv_size) { | |
2524 | err = -EINVAL; | |
2525 | goto err_free_metadata; | |
2526 | } | |
2527 | ||
440a23b3 MP |
2528 | etm = zalloc(sizeof(*etm)); |
2529 | ||
cd8bfd8c | 2530 | if (!etm) { |
440a23b3 | 2531 | err = -ENOMEM; |
cd8bfd8c TJ |
2532 | goto err_free_metadata; |
2533 | } | |
440a23b3 MP |
2534 | |
2535 | err = auxtrace_queues__init(&etm->queues); | |
2536 | if (err) | |
2537 | goto err_free_etm; | |
2538 | ||
2539 | etm->session = session; | |
2540 | etm->machine = &session->machines.host; | |
2541 | ||
cd8bfd8c TJ |
2542 | etm->num_cpu = num_cpu; |
2543 | etm->pmu_type = pmu_type; | |
2544 | etm->snapshot_mode = (hdr[CS_ETM_SNAPSHOT] != 0); | |
2545 | etm->metadata = metadata; | |
440a23b3 MP |
2546 | etm->auxtrace_type = auxtrace_info->type; |
2547 | etm->timeless_decoding = cs_etm__is_timeless_decoding(etm); | |
2548 | ||
2549 | etm->auxtrace.process_event = cs_etm__process_event; | |
2550 | etm->auxtrace.process_auxtrace_event = cs_etm__process_auxtrace_event; | |
2551 | etm->auxtrace.flush_events = cs_etm__flush_events; | |
2552 | etm->auxtrace.free_events = cs_etm__free_events; | |
2553 | etm->auxtrace.free = cs_etm__free; | |
2554 | session->auxtrace = &etm->auxtrace; | |
2555 | ||
46d53620 | 2556 | etm->unknown_thread = thread__new(999999999, 999999999); |
6285bd15 Y |
2557 | if (!etm->unknown_thread) { |
2558 | err = -ENOMEM; | |
46d53620 | 2559 | goto err_free_queues; |
6285bd15 | 2560 | } |
46d53620 LY |
2561 | |
2562 | /* | |
2563 | * Initialize list node so that at thread__zput() we can avoid | |
2564 | * segmentation fault at list_del_init(). | |
2565 | */ | |
2566 | INIT_LIST_HEAD(&etm->unknown_thread->node); | |
2567 | ||
2568 | err = thread__set_comm(etm->unknown_thread, "unknown", 0); | |
2569 | if (err) | |
2570 | goto err_delete_thread; | |
2571 | ||
6285bd15 Y |
2572 | if (thread__init_map_groups(etm->unknown_thread, etm->machine)) { |
2573 | err = -ENOMEM; | |
46d53620 | 2574 | goto err_delete_thread; |
6285bd15 | 2575 | } |
46d53620 | 2576 | |
cd8bfd8c TJ |
2577 | if (dump_trace) { |
2578 | cs_etm__print_auxtrace_info(auxtrace_info->priv, num_cpu); | |
440a23b3 | 2579 | return 0; |
cd8bfd8c | 2580 | } |
440a23b3 | 2581 | |
0702f23c | 2582 | if (session->itrace_synth_opts->set) { |
b12235b1 MP |
2583 | etm->synth_opts = *session->itrace_synth_opts; |
2584 | } else { | |
4eb06815 AK |
2585 | itrace_synth_opts__set_default(&etm->synth_opts, |
2586 | session->itrace_synth_opts->default_no_sample); | |
b12235b1 MP |
2587 | etm->synth_opts.callchain = false; |
2588 | } | |
2589 | ||
2590 | err = cs_etm__synth_events(etm, session); | |
2591 | if (err) | |
46d53620 | 2592 | goto err_delete_thread; |
b12235b1 | 2593 | |
440a23b3 MP |
2594 | err = auxtrace_queues__process_index(&etm->queues, session); |
2595 | if (err) | |
46d53620 | 2596 | goto err_delete_thread; |
440a23b3 MP |
2597 | |
2598 | etm->data_queued = etm->queues.populated; | |
2599 | ||
2600 | return 0; | |
2601 | ||
46d53620 LY |
2602 | err_delete_thread: |
2603 | thread__zput(etm->unknown_thread); | |
440a23b3 MP |
2604 | err_free_queues: |
2605 | auxtrace_queues__free(&etm->queues); | |
2606 | session->auxtrace = NULL; | |
2607 | err_free_etm: | |
2608 | zfree(&etm); | |
cd8bfd8c TJ |
2609 | err_free_metadata: |
2610 | /* No need to check @metadata[j], free(NULL) is supported */ | |
2611 | for (j = 0; j < num_cpu; j++) | |
d8f9da24 | 2612 | zfree(&metadata[j]); |
cd8bfd8c TJ |
2613 | zfree(&metadata); |
2614 | err_free_traceid_list: | |
2615 | intlist__delete(traceid_list); | |
2616 | err_free_hdr: | |
2617 | zfree(&hdr); | |
440a23b3 | 2618 | |
6285bd15 | 2619 | return err; |
440a23b3 | 2620 | } |