1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright(C) 2015-2018 Linaro Limited.
5 * Author: Tor Jeremiassen <tor@ti.com>
6 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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>
15 #include <opencsd/ocsd_if_types.h>
21 #include "cs-etm-decoder/cs-etm-decoder.h"
30 #include "thread_map.h"
31 #include "thread-stack.h"
34 #define MAX_TIMESTAMP (~0ULL)
36 struct cs_etm_auxtrace {
37 struct auxtrace auxtrace;
38 struct auxtrace_queues queues;
39 struct auxtrace_heap heap;
40 struct itrace_synth_opts synth_opts;
41 struct perf_session *session;
42 struct machine *machine;
43 struct thread *unknown_thread;
49 u8 sample_instructions;
53 u64 branches_sample_type;
55 u64 instructions_sample_type;
56 u64 instructions_sample_period;
60 unsigned int pmu_type;
64 struct cs_etm_auxtrace *etm;
65 struct thread *thread;
66 struct cs_etm_decoder *decoder;
67 struct auxtrace_buffer *buffer;
68 union perf_event *event_buf;
69 unsigned int queue_nr;
73 u64 period_instructions;
74 struct branch_stack *last_branch;
75 struct branch_stack *last_branch_rb;
76 size_t last_branch_pos;
77 struct cs_etm_packet *prev_packet;
78 struct cs_etm_packet *packet;
79 const unsigned char *buf;
80 size_t buf_len, buf_used;
83 static int cs_etm__update_queues(struct cs_etm_auxtrace *etm);
84 static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
87 /* PTMs ETMIDR [11:8] set to b0011 */
88 #define ETMIDR_PTM_VERSION 0x00000300
90 static u32 cs_etm__get_v7_protocol_version(u32 etmidr)
92 etmidr &= ETMIDR_PTM_VERSION;
94 if (etmidr == ETMIDR_PTM_VERSION)
95 return CS_ETM_PROTO_PTM;
97 return CS_ETM_PROTO_ETMV3;
100 static int cs_etm__get_magic(u8 trace_chan_id, u64 *magic)
102 struct int_node *inode;
105 inode = intlist__find(traceid_list, trace_chan_id);
109 metadata = inode->priv;
110 *magic = metadata[CS_ETM_MAGIC];
114 int cs_etm__get_cpu(u8 trace_chan_id, int *cpu)
116 struct int_node *inode;
119 inode = intlist__find(traceid_list, trace_chan_id);
123 metadata = inode->priv;
124 *cpu = (int)metadata[CS_ETM_CPU];
128 static void cs_etm__packet_dump(const char *pkt_string)
130 const char *color = PERF_COLOR_BLUE;
131 int len = strlen(pkt_string);
133 if (len && (pkt_string[len-1] == '\n'))
134 color_fprintf(stdout, color, " %s", pkt_string);
136 color_fprintf(stdout, color, " %s\n", pkt_string);
141 static void cs_etm__set_trace_param_etmv3(struct cs_etm_trace_params *t_params,
142 struct cs_etm_auxtrace *etm, int idx,
145 u64 **metadata = etm->metadata;
147 t_params[idx].protocol = cs_etm__get_v7_protocol_version(etmidr);
148 t_params[idx].etmv3.reg_ctrl = metadata[idx][CS_ETM_ETMCR];
149 t_params[idx].etmv3.reg_trc_id = metadata[idx][CS_ETM_ETMTRACEIDR];
152 static void cs_etm__set_trace_param_etmv4(struct cs_etm_trace_params *t_params,
153 struct cs_etm_auxtrace *etm, int idx)
155 u64 **metadata = etm->metadata;
157 t_params[idx].protocol = CS_ETM_PROTO_ETMV4i;
158 t_params[idx].etmv4.reg_idr0 = metadata[idx][CS_ETMV4_TRCIDR0];
159 t_params[idx].etmv4.reg_idr1 = metadata[idx][CS_ETMV4_TRCIDR1];
160 t_params[idx].etmv4.reg_idr2 = metadata[idx][CS_ETMV4_TRCIDR2];
161 t_params[idx].etmv4.reg_idr8 = metadata[idx][CS_ETMV4_TRCIDR8];
162 t_params[idx].etmv4.reg_configr = metadata[idx][CS_ETMV4_TRCCONFIGR];
163 t_params[idx].etmv4.reg_traceidr = metadata[idx][CS_ETMV4_TRCTRACEIDR];
166 static int cs_etm__init_trace_params(struct cs_etm_trace_params *t_params,
167 struct cs_etm_auxtrace *etm)
173 for (i = 0; i < etm->num_cpu; i++) {
174 architecture = etm->metadata[i][CS_ETM_MAGIC];
176 switch (architecture) {
177 case __perf_cs_etmv3_magic:
178 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
179 cs_etm__set_trace_param_etmv3(t_params, etm, i, etmidr);
181 case __perf_cs_etmv4_magic:
182 cs_etm__set_trace_param_etmv4(t_params, etm, i);
192 static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
193 struct cs_etm_queue *etmq,
194 enum cs_etm_decoder_operation mode)
198 if (!(mode < CS_ETM_OPERATION_MAX))
201 d_params->packet_printer = cs_etm__packet_dump;
202 d_params->operation = mode;
203 d_params->data = etmq;
204 d_params->formatted = true;
205 d_params->fsyncs = false;
206 d_params->hsyncs = false;
207 d_params->frame_aligned = true;
214 static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
215 struct auxtrace_buffer *buffer)
218 const char *color = PERF_COLOR_BLUE;
219 struct cs_etm_decoder_params d_params;
220 struct cs_etm_trace_params *t_params;
221 struct cs_etm_decoder *decoder;
222 size_t buffer_used = 0;
224 fprintf(stdout, "\n");
225 color_fprintf(stdout, color,
226 ". ... CoreSight ETM Trace data: size %zu bytes\n",
229 /* Use metadata to fill in trace parameters for trace decoder */
230 t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
235 if (cs_etm__init_trace_params(t_params, etm))
238 /* Set decoder parameters to simply print the trace packets */
239 if (cs_etm__init_decoder_params(&d_params, NULL,
240 CS_ETM_OPERATION_PRINT))
243 decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
250 ret = cs_etm_decoder__process_data_block(
251 decoder, buffer->offset,
252 &((u8 *)buffer->data)[buffer_used],
253 buffer->size - buffer_used, &consumed);
257 buffer_used += consumed;
258 } while (buffer_used < buffer->size);
260 cs_etm_decoder__free(decoder);
266 static int cs_etm__flush_events(struct perf_session *session,
267 struct perf_tool *tool)
270 struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
271 struct cs_etm_auxtrace,
276 if (!tool->ordered_events)
279 if (!etm->timeless_decoding)
282 ret = cs_etm__update_queues(etm);
287 return cs_etm__process_timeless_queues(etm, -1);
290 static void cs_etm__free_queue(void *priv)
292 struct cs_etm_queue *etmq = priv;
297 thread__zput(etmq->thread);
298 cs_etm_decoder__free(etmq->decoder);
299 zfree(&etmq->event_buf);
300 zfree(&etmq->last_branch);
301 zfree(&etmq->last_branch_rb);
302 zfree(&etmq->prev_packet);
303 zfree(&etmq->packet);
307 static void cs_etm__free_events(struct perf_session *session)
310 struct cs_etm_auxtrace *aux = container_of(session->auxtrace,
311 struct cs_etm_auxtrace,
313 struct auxtrace_queues *queues = &aux->queues;
315 for (i = 0; i < queues->nr_queues; i++) {
316 cs_etm__free_queue(queues->queue_array[i].priv);
317 queues->queue_array[i].priv = NULL;
320 auxtrace_queues__free(queues);
323 static void cs_etm__free(struct perf_session *session)
326 struct int_node *inode, *tmp;
327 struct cs_etm_auxtrace *aux = container_of(session->auxtrace,
328 struct cs_etm_auxtrace,
330 cs_etm__free_events(session);
331 session->auxtrace = NULL;
333 /* First remove all traceID/metadata nodes for the RB tree */
334 intlist__for_each_entry_safe(inode, tmp, traceid_list)
335 intlist__remove(traceid_list, inode);
336 /* Then the RB tree itself */
337 intlist__delete(traceid_list);
339 for (i = 0; i < aux->num_cpu; i++)
340 zfree(&aux->metadata[i]);
342 thread__zput(aux->unknown_thread);
343 zfree(&aux->metadata);
347 static u8 cs_etm__cpu_mode(struct cs_etm_queue *etmq, u64 address)
349 struct machine *machine;
351 machine = etmq->etm->machine;
353 if (address >= etmq->etm->kernel_start) {
354 if (machine__is_host(machine))
355 return PERF_RECORD_MISC_KERNEL;
357 return PERF_RECORD_MISC_GUEST_KERNEL;
359 if (machine__is_host(machine))
360 return PERF_RECORD_MISC_USER;
362 return PERF_RECORD_MISC_GUEST_USER;
364 return PERF_RECORD_MISC_HYPERVISOR;
368 static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address,
369 size_t size, u8 *buffer)
374 struct thread *thread;
375 struct machine *machine;
376 struct addr_location al;
381 machine = etmq->etm->machine;
382 cpumode = cs_etm__cpu_mode(etmq, address);
384 thread = etmq->thread;
386 if (cpumode != PERF_RECORD_MISC_KERNEL)
388 thread = etmq->etm->unknown_thread;
391 if (!thread__find_map(thread, cpumode, address, &al) || !al.map->dso)
394 if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR &&
395 dso__data_status_seen(al.map->dso, DSO_DATA_STATUS_SEEN_ITRACE))
398 offset = al.map->map_ip(al.map, address);
402 len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size);
410 static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm)
412 struct cs_etm_decoder_params d_params;
413 struct cs_etm_trace_params *t_params = NULL;
414 struct cs_etm_queue *etmq;
415 size_t szp = sizeof(struct cs_etm_packet);
417 etmq = zalloc(sizeof(*etmq));
421 etmq->packet = zalloc(szp);
425 etmq->prev_packet = zalloc(szp);
426 if (!etmq->prev_packet)
429 if (etm->synth_opts.last_branch) {
430 size_t sz = sizeof(struct branch_stack);
432 sz += etm->synth_opts.last_branch_sz *
433 sizeof(struct branch_entry);
434 etmq->last_branch = zalloc(sz);
435 if (!etmq->last_branch)
437 etmq->last_branch_rb = zalloc(sz);
438 if (!etmq->last_branch_rb)
442 etmq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE);
443 if (!etmq->event_buf)
446 /* Use metadata to fill in trace parameters for trace decoder */
447 t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
452 if (cs_etm__init_trace_params(t_params, etm))
455 /* Set decoder parameters to decode trace packets */
456 if (cs_etm__init_decoder_params(&d_params, etmq,
457 CS_ETM_OPERATION_DECODE))
460 etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
466 * Register a function to handle all memory accesses required by
467 * the trace decoder library.
469 if (cs_etm_decoder__add_mem_access_cb(etmq->decoder,
472 goto out_free_decoder;
478 cs_etm_decoder__free(etmq->decoder);
481 zfree(&etmq->event_buf);
482 zfree(&etmq->last_branch);
483 zfree(&etmq->last_branch_rb);
484 zfree(&etmq->prev_packet);
485 zfree(&etmq->packet);
491 static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
492 struct auxtrace_queue *queue,
493 unsigned int queue_nr)
496 struct cs_etm_queue *etmq = queue->priv;
498 if (list_empty(&queue->head) || etmq)
501 etmq = cs_etm__alloc_queue(etm);
510 etmq->queue_nr = queue_nr;
511 etmq->cpu = queue->cpu;
512 etmq->tid = queue->tid;
515 etmq->period_instructions = 0;
521 static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
526 if (!etm->kernel_start)
527 etm->kernel_start = machine__kernel_start(etm->machine);
529 for (i = 0; i < etm->queues.nr_queues; i++) {
530 ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i);
538 static int cs_etm__update_queues(struct cs_etm_auxtrace *etm)
540 if (etm->queues.new_data) {
541 etm->queues.new_data = false;
542 return cs_etm__setup_queues(etm);
548 static inline void cs_etm__copy_last_branch_rb(struct cs_etm_queue *etmq)
550 struct branch_stack *bs_src = etmq->last_branch_rb;
551 struct branch_stack *bs_dst = etmq->last_branch;
555 * Set the number of records before early exit: ->nr is used to
556 * determine how many branches to copy from ->entries.
558 bs_dst->nr = bs_src->nr;
561 * Early exit when there is nothing to copy.
567 * As bs_src->entries is a circular buffer, we need to copy from it in
568 * two steps. First, copy the branches from the most recently inserted
569 * branch ->last_branch_pos until the end of bs_src->entries buffer.
571 nr = etmq->etm->synth_opts.last_branch_sz - etmq->last_branch_pos;
572 memcpy(&bs_dst->entries[0],
573 &bs_src->entries[etmq->last_branch_pos],
574 sizeof(struct branch_entry) * nr);
577 * If we wrapped around at least once, the branches from the beginning
578 * of the bs_src->entries buffer and until the ->last_branch_pos element
579 * are older valid branches: copy them over. The total number of
580 * branches copied over will be equal to the number of branches asked by
581 * the user in last_branch_sz.
583 if (bs_src->nr >= etmq->etm->synth_opts.last_branch_sz) {
584 memcpy(&bs_dst->entries[nr],
586 sizeof(struct branch_entry) * etmq->last_branch_pos);
590 static inline void cs_etm__reset_last_branch_rb(struct cs_etm_queue *etmq)
592 etmq->last_branch_pos = 0;
593 etmq->last_branch_rb->nr = 0;
596 static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq,
600 cs_etm__mem_access(etmq, addr, ARRAY_SIZE(instrBytes), instrBytes);
602 * T32 instruction size is indicated by bits[15:11] of the first
603 * 16-bit word of the instruction: 0b11101, 0b11110 and 0b11111
604 * denote a 32-bit instruction.
606 return ((instrBytes[1] & 0xF8) >= 0xE8) ? 4 : 2;
609 static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet)
611 /* Returns 0 for the CS_ETM_DISCONTINUITY packet */
612 if (packet->sample_type == CS_ETM_DISCONTINUITY)
615 return packet->start_addr;
619 u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet)
621 /* Returns 0 for the CS_ETM_DISCONTINUITY packet */
622 if (packet->sample_type == CS_ETM_DISCONTINUITY)
625 return packet->end_addr - packet->last_instr_size;
628 static inline u64 cs_etm__instr_addr(struct cs_etm_queue *etmq,
629 const struct cs_etm_packet *packet,
632 if (packet->isa == CS_ETM_ISA_T32) {
633 u64 addr = packet->start_addr;
636 addr += cs_etm__t32_instr_size(etmq, addr);
642 /* Assume a 4 byte instruction size (A32/A64) */
643 return packet->start_addr + offset * 4;
646 static void cs_etm__update_last_branch_rb(struct cs_etm_queue *etmq)
648 struct branch_stack *bs = etmq->last_branch_rb;
649 struct branch_entry *be;
652 * The branches are recorded in a circular buffer in reverse
653 * chronological order: we start recording from the last element of the
654 * buffer down. After writing the first element of the stack, move the
655 * insert position back to the end of the buffer.
657 if (!etmq->last_branch_pos)
658 etmq->last_branch_pos = etmq->etm->synth_opts.last_branch_sz;
660 etmq->last_branch_pos -= 1;
662 be = &bs->entries[etmq->last_branch_pos];
663 be->from = cs_etm__last_executed_instr(etmq->prev_packet);
664 be->to = cs_etm__first_executed_instr(etmq->packet);
665 /* No support for mispredict */
666 be->flags.mispred = 0;
667 be->flags.predicted = 1;
670 * Increment bs->nr until reaching the number of last branches asked by
671 * the user on the command line.
673 if (bs->nr < etmq->etm->synth_opts.last_branch_sz)
677 static int cs_etm__inject_event(union perf_event *event,
678 struct perf_sample *sample, u64 type)
680 event->header.size = perf_event__sample_event_size(sample, type, 0);
681 return perf_event__synthesize_sample(event, type, 0, sample);
686 cs_etm__get_trace(struct cs_etm_queue *etmq)
688 struct auxtrace_buffer *aux_buffer = etmq->buffer;
689 struct auxtrace_buffer *old_buffer = aux_buffer;
690 struct auxtrace_queue *queue;
692 queue = &etmq->etm->queues.queue_array[etmq->queue_nr];
694 aux_buffer = auxtrace_buffer__next(queue, aux_buffer);
696 /* If no more data, drop the previous auxtrace_buffer and return */
699 auxtrace_buffer__drop_data(old_buffer);
704 etmq->buffer = aux_buffer;
706 /* If the aux_buffer doesn't have data associated, try to load it */
707 if (!aux_buffer->data) {
708 /* get the file desc associated with the perf data file */
709 int fd = perf_data__fd(etmq->etm->session->data);
711 aux_buffer->data = auxtrace_buffer__get_data(aux_buffer, fd);
712 if (!aux_buffer->data)
716 /* If valid, drop the previous buffer */
718 auxtrace_buffer__drop_data(old_buffer);
721 etmq->buf_len = aux_buffer->size;
722 etmq->buf = aux_buffer->data;
724 return etmq->buf_len;
727 static void cs_etm__set_pid_tid_cpu(struct cs_etm_auxtrace *etm,
728 struct auxtrace_queue *queue)
730 struct cs_etm_queue *etmq = queue->priv;
732 /* CPU-wide tracing isn't supported yet */
733 if (queue->tid == -1)
736 if ((!etmq->thread) && (etmq->tid != -1))
737 etmq->thread = machine__find_thread(etm->machine, -1,
741 etmq->pid = etmq->thread->pid_;
742 if (queue->cpu == -1)
743 etmq->cpu = etmq->thread->cpu;
747 static int cs_etm__synth_instruction_sample(struct cs_etm_queue *etmq,
748 u64 addr, u64 period)
751 struct cs_etm_auxtrace *etm = etmq->etm;
752 union perf_event *event = etmq->event_buf;
753 struct perf_sample sample = {.ip = 0,};
755 event->sample.header.type = PERF_RECORD_SAMPLE;
756 event->sample.header.misc = cs_etm__cpu_mode(etmq, addr);
757 event->sample.header.size = sizeof(struct perf_event_header);
760 sample.pid = etmq->pid;
761 sample.tid = etmq->tid;
762 sample.id = etmq->etm->instructions_id;
763 sample.stream_id = etmq->etm->instructions_id;
764 sample.period = period;
765 sample.cpu = etmq->packet->cpu;
766 sample.flags = etmq->prev_packet->flags;
768 sample.cpumode = event->sample.header.misc;
770 if (etm->synth_opts.last_branch) {
771 cs_etm__copy_last_branch_rb(etmq);
772 sample.branch_stack = etmq->last_branch;
775 if (etm->synth_opts.inject) {
776 ret = cs_etm__inject_event(event, &sample,
777 etm->instructions_sample_type);
782 ret = perf_session__deliver_synth_event(etm->session, event, &sample);
786 "CS ETM Trace: failed to deliver instruction event, error %d\n",
789 if (etm->synth_opts.last_branch)
790 cs_etm__reset_last_branch_rb(etmq);
796 * The cs etm packet encodes an instruction range between a branch target
797 * and the next taken branch. Generate sample accordingly.
799 static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq)
802 struct cs_etm_auxtrace *etm = etmq->etm;
803 struct perf_sample sample = {.ip = 0,};
804 union perf_event *event = etmq->event_buf;
805 struct dummy_branch_stack {
807 struct branch_entry entries;
811 ip = cs_etm__last_executed_instr(etmq->prev_packet);
813 event->sample.header.type = PERF_RECORD_SAMPLE;
814 event->sample.header.misc = cs_etm__cpu_mode(etmq, ip);
815 event->sample.header.size = sizeof(struct perf_event_header);
818 sample.pid = etmq->pid;
819 sample.tid = etmq->tid;
820 sample.addr = cs_etm__first_executed_instr(etmq->packet);
821 sample.id = etmq->etm->branches_id;
822 sample.stream_id = etmq->etm->branches_id;
824 sample.cpu = etmq->packet->cpu;
825 sample.flags = etmq->prev_packet->flags;
826 sample.cpumode = event->sample.header.misc;
829 * perf report cannot handle events without a branch stack
831 if (etm->synth_opts.last_branch) {
832 dummy_bs = (struct dummy_branch_stack){
839 sample.branch_stack = (struct branch_stack *)&dummy_bs;
842 if (etm->synth_opts.inject) {
843 ret = cs_etm__inject_event(event, &sample,
844 etm->branches_sample_type);
849 ret = perf_session__deliver_synth_event(etm->session, event, &sample);
853 "CS ETM Trace: failed to deliver instruction event, error %d\n",
859 struct cs_etm_synth {
860 struct perf_tool dummy_tool;
861 struct perf_session *session;
864 static int cs_etm__event_synth(struct perf_tool *tool,
865 union perf_event *event,
866 struct perf_sample *sample __maybe_unused,
867 struct machine *machine __maybe_unused)
869 struct cs_etm_synth *cs_etm_synth =
870 container_of(tool, struct cs_etm_synth, dummy_tool);
872 return perf_session__deliver_synth_event(cs_etm_synth->session,
876 static int cs_etm__synth_event(struct perf_session *session,
877 struct perf_event_attr *attr, u64 id)
879 struct cs_etm_synth cs_etm_synth;
881 memset(&cs_etm_synth, 0, sizeof(struct cs_etm_synth));
882 cs_etm_synth.session = session;
884 return perf_event__synthesize_attr(&cs_etm_synth.dummy_tool, attr, 1,
885 &id, cs_etm__event_synth);
888 static int cs_etm__synth_events(struct cs_etm_auxtrace *etm,
889 struct perf_session *session)
891 struct perf_evlist *evlist = session->evlist;
892 struct perf_evsel *evsel;
893 struct perf_event_attr attr;
898 evlist__for_each_entry(evlist, evsel) {
899 if (evsel->attr.type == etm->pmu_type) {
906 pr_debug("No selected events with CoreSight Trace data\n");
910 memset(&attr, 0, sizeof(struct perf_event_attr));
911 attr.size = sizeof(struct perf_event_attr);
912 attr.type = PERF_TYPE_HARDWARE;
913 attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK;
914 attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID |
916 if (etm->timeless_decoding)
917 attr.sample_type &= ~(u64)PERF_SAMPLE_TIME;
919 attr.sample_type |= PERF_SAMPLE_TIME;
921 attr.exclude_user = evsel->attr.exclude_user;
922 attr.exclude_kernel = evsel->attr.exclude_kernel;
923 attr.exclude_hv = evsel->attr.exclude_hv;
924 attr.exclude_host = evsel->attr.exclude_host;
925 attr.exclude_guest = evsel->attr.exclude_guest;
926 attr.sample_id_all = evsel->attr.sample_id_all;
927 attr.read_format = evsel->attr.read_format;
929 /* create new id val to be a fixed offset from evsel id */
930 id = evsel->id[0] + 1000000000;
935 if (etm->synth_opts.branches) {
936 attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS;
937 attr.sample_period = 1;
938 attr.sample_type |= PERF_SAMPLE_ADDR;
939 err = cs_etm__synth_event(session, &attr, id);
942 etm->sample_branches = true;
943 etm->branches_sample_type = attr.sample_type;
944 etm->branches_id = id;
946 attr.sample_type &= ~(u64)PERF_SAMPLE_ADDR;
949 if (etm->synth_opts.last_branch)
950 attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
952 if (etm->synth_opts.instructions) {
953 attr.config = PERF_COUNT_HW_INSTRUCTIONS;
954 attr.sample_period = etm->synth_opts.period;
955 etm->instructions_sample_period = attr.sample_period;
956 err = cs_etm__synth_event(session, &attr, id);
959 etm->sample_instructions = true;
960 etm->instructions_sample_type = attr.sample_type;
961 etm->instructions_id = id;
968 static int cs_etm__sample(struct cs_etm_queue *etmq)
970 struct cs_etm_auxtrace *etm = etmq->etm;
971 struct cs_etm_packet *tmp;
973 u64 instrs_executed = etmq->packet->instr_count;
975 etmq->period_instructions += instrs_executed;
978 * Record a branch when the last instruction in
979 * PREV_PACKET is a branch.
981 if (etm->synth_opts.last_branch &&
982 etmq->prev_packet->sample_type == CS_ETM_RANGE &&
983 etmq->prev_packet->last_instr_taken_branch)
984 cs_etm__update_last_branch_rb(etmq);
986 if (etm->sample_instructions &&
987 etmq->period_instructions >= etm->instructions_sample_period) {
989 * Emit instruction sample periodically
990 * TODO: allow period to be defined in cycles and clock time
993 /* Get number of instructions executed after the sample point */
994 u64 instrs_over = etmq->period_instructions -
995 etm->instructions_sample_period;
998 * Calculate the address of the sampled instruction (-1 as
999 * sample is reported as though instruction has just been
1000 * executed, but PC has not advanced to next instruction)
1002 u64 offset = (instrs_executed - instrs_over - 1);
1003 u64 addr = cs_etm__instr_addr(etmq, etmq->packet, offset);
1005 ret = cs_etm__synth_instruction_sample(
1006 etmq, addr, etm->instructions_sample_period);
1010 /* Carry remaining instructions into next sample period */
1011 etmq->period_instructions = instrs_over;
1014 if (etm->sample_branches) {
1015 bool generate_sample = false;
1017 /* Generate sample for tracing on packet */
1018 if (etmq->prev_packet->sample_type == CS_ETM_DISCONTINUITY)
1019 generate_sample = true;
1021 /* Generate sample for branch taken packet */
1022 if (etmq->prev_packet->sample_type == CS_ETM_RANGE &&
1023 etmq->prev_packet->last_instr_taken_branch)
1024 generate_sample = true;
1026 if (generate_sample) {
1027 ret = cs_etm__synth_branch_sample(etmq);
1033 if (etm->sample_branches || etm->synth_opts.last_branch) {
1035 * Swap PACKET with PREV_PACKET: PACKET becomes PREV_PACKET for
1036 * the next incoming packet.
1039 etmq->packet = etmq->prev_packet;
1040 etmq->prev_packet = tmp;
1046 static int cs_etm__exception(struct cs_etm_queue *etmq)
1049 * When the exception packet is inserted, whether the last instruction
1050 * in previous range packet is taken branch or not, we need to force
1051 * to set 'prev_packet->last_instr_taken_branch' to true. This ensures
1052 * to generate branch sample for the instruction range before the
1053 * exception is trapped to kernel or before the exception returning.
1055 * The exception packet includes the dummy address values, so don't
1056 * swap PACKET with PREV_PACKET. This keeps PREV_PACKET to be useful
1057 * for generating instruction and branch samples.
1059 if (etmq->prev_packet->sample_type == CS_ETM_RANGE)
1060 etmq->prev_packet->last_instr_taken_branch = true;
1065 static int cs_etm__flush(struct cs_etm_queue *etmq)
1068 struct cs_etm_auxtrace *etm = etmq->etm;
1069 struct cs_etm_packet *tmp;
1071 /* Handle start tracing packet */
1072 if (etmq->prev_packet->sample_type == CS_ETM_EMPTY)
1075 if (etmq->etm->synth_opts.last_branch &&
1076 etmq->prev_packet->sample_type == CS_ETM_RANGE) {
1078 * Generate a last branch event for the branches left in the
1079 * circular buffer at the end of the trace.
1081 * Use the address of the end of the last reported execution
1084 u64 addr = cs_etm__last_executed_instr(etmq->prev_packet);
1086 err = cs_etm__synth_instruction_sample(
1088 etmq->period_instructions);
1092 etmq->period_instructions = 0;
1096 if (etm->sample_branches &&
1097 etmq->prev_packet->sample_type == CS_ETM_RANGE) {
1098 err = cs_etm__synth_branch_sample(etmq);
1104 if (etm->sample_branches || etm->synth_opts.last_branch) {
1106 * Swap PACKET with PREV_PACKET: PACKET becomes PREV_PACKET for
1107 * the next incoming packet.
1110 etmq->packet = etmq->prev_packet;
1111 etmq->prev_packet = tmp;
1117 static int cs_etm__end_block(struct cs_etm_queue *etmq)
1122 * It has no new packet coming and 'etmq->packet' contains the stale
1123 * packet which was set at the previous time with packets swapping;
1124 * so skip to generate branch sample to avoid stale packet.
1126 * For this case only flush branch stack and generate a last branch
1127 * event for the branches left in the circular buffer at the end of
1130 if (etmq->etm->synth_opts.last_branch &&
1131 etmq->prev_packet->sample_type == CS_ETM_RANGE) {
1133 * Use the address of the end of the last reported execution
1136 u64 addr = cs_etm__last_executed_instr(etmq->prev_packet);
1138 err = cs_etm__synth_instruction_sample(
1140 etmq->period_instructions);
1144 etmq->period_instructions = 0;
1150 * cs_etm__get_data_block: Fetch a block from the auxtrace_buffer queue
1152 * Returns: < 0 if error
1153 * = 0 if no more auxtrace_buffer to read
1154 * > 0 if the current buffer isn't empty yet
1156 static int cs_etm__get_data_block(struct cs_etm_queue *etmq)
1160 if (!etmq->buf_len) {
1161 ret = cs_etm__get_trace(etmq);
1165 * We cannot assume consecutive blocks in the data file
1166 * are contiguous, reset the decoder to force re-sync.
1168 ret = cs_etm_decoder__reset(etmq->decoder);
1173 return etmq->buf_len;
1176 static bool cs_etm__is_svc_instr(struct cs_etm_queue *etmq,
1177 struct cs_etm_packet *packet,
1184 switch (packet->isa) {
1185 case CS_ETM_ISA_T32:
1187 * The SVC of T32 is defined in ARM DDI 0487D.a, F5.1.247:
1190 * +-----------------+--------+
1191 * | 1 1 0 1 1 1 1 1 | imm8 |
1192 * +-----------------+--------+
1194 * According to the specifiction, it only defines SVC for T32
1195 * with 16 bits instruction and has no definition for 32bits;
1196 * so below only read 2 bytes as instruction size for T32.
1198 addr = end_addr - 2;
1199 cs_etm__mem_access(etmq, addr, sizeof(instr16), (u8 *)&instr16);
1200 if ((instr16 & 0xFF00) == 0xDF00)
1204 case CS_ETM_ISA_A32:
1206 * The SVC of A32 is defined in ARM DDI 0487D.a, F5.1.247:
1208 * b'31 b'28 b'27 b'24
1209 * +---------+---------+-------------------------+
1210 * | !1111 | 1 1 1 1 | imm24 |
1211 * +---------+---------+-------------------------+
1213 addr = end_addr - 4;
1214 cs_etm__mem_access(etmq, addr, sizeof(instr32), (u8 *)&instr32);
1215 if ((instr32 & 0x0F000000) == 0x0F000000 &&
1216 (instr32 & 0xF0000000) != 0xF0000000)
1220 case CS_ETM_ISA_A64:
1222 * The SVC of A64 is defined in ARM DDI 0487D.a, C6.2.294:
1225 * +-----------------------+---------+-----------+
1226 * | 1 1 0 1 0 1 0 0 0 0 0 | imm16 | 0 0 0 0 1 |
1227 * +-----------------------+---------+-----------+
1229 addr = end_addr - 4;
1230 cs_etm__mem_access(etmq, addr, sizeof(instr32), (u8 *)&instr32);
1231 if ((instr32 & 0xFFE0001F) == 0xd4000001)
1235 case CS_ETM_ISA_UNKNOWN:
1243 static bool cs_etm__is_syscall(struct cs_etm_queue *etmq, u64 magic)
1245 struct cs_etm_packet *packet = etmq->packet;
1246 struct cs_etm_packet *prev_packet = etmq->prev_packet;
1248 if (magic == __perf_cs_etmv3_magic)
1249 if (packet->exception_number == CS_ETMV3_EXC_SVC)
1253 * ETMv4 exception type CS_ETMV4_EXC_CALL covers SVC, SMC and
1254 * HVC cases; need to check if it's SVC instruction based on
1257 if (magic == __perf_cs_etmv4_magic) {
1258 if (packet->exception_number == CS_ETMV4_EXC_CALL &&
1259 cs_etm__is_svc_instr(etmq, prev_packet,
1260 prev_packet->end_addr))
1267 static bool cs_etm__is_async_exception(struct cs_etm_queue *etmq, u64 magic)
1269 struct cs_etm_packet *packet = etmq->packet;
1271 if (magic == __perf_cs_etmv3_magic)
1272 if (packet->exception_number == CS_ETMV3_EXC_DEBUG_HALT ||
1273 packet->exception_number == CS_ETMV3_EXC_ASYNC_DATA_ABORT ||
1274 packet->exception_number == CS_ETMV3_EXC_PE_RESET ||
1275 packet->exception_number == CS_ETMV3_EXC_IRQ ||
1276 packet->exception_number == CS_ETMV3_EXC_FIQ)
1279 if (magic == __perf_cs_etmv4_magic)
1280 if (packet->exception_number == CS_ETMV4_EXC_RESET ||
1281 packet->exception_number == CS_ETMV4_EXC_DEBUG_HALT ||
1282 packet->exception_number == CS_ETMV4_EXC_SYSTEM_ERROR ||
1283 packet->exception_number == CS_ETMV4_EXC_INST_DEBUG ||
1284 packet->exception_number == CS_ETMV4_EXC_DATA_DEBUG ||
1285 packet->exception_number == CS_ETMV4_EXC_IRQ ||
1286 packet->exception_number == CS_ETMV4_EXC_FIQ)
1292 static bool cs_etm__is_sync_exception(struct cs_etm_queue *etmq, u64 magic)
1294 struct cs_etm_packet *packet = etmq->packet;
1295 struct cs_etm_packet *prev_packet = etmq->prev_packet;
1297 if (magic == __perf_cs_etmv3_magic)
1298 if (packet->exception_number == CS_ETMV3_EXC_SMC ||
1299 packet->exception_number == CS_ETMV3_EXC_HYP ||
1300 packet->exception_number == CS_ETMV3_EXC_JAZELLE_THUMBEE ||
1301 packet->exception_number == CS_ETMV3_EXC_UNDEFINED_INSTR ||
1302 packet->exception_number == CS_ETMV3_EXC_PREFETCH_ABORT ||
1303 packet->exception_number == CS_ETMV3_EXC_DATA_FAULT ||
1304 packet->exception_number == CS_ETMV3_EXC_GENERIC)
1307 if (magic == __perf_cs_etmv4_magic) {
1308 if (packet->exception_number == CS_ETMV4_EXC_TRAP ||
1309 packet->exception_number == CS_ETMV4_EXC_ALIGNMENT ||
1310 packet->exception_number == CS_ETMV4_EXC_INST_FAULT ||
1311 packet->exception_number == CS_ETMV4_EXC_DATA_FAULT)
1315 * For CS_ETMV4_EXC_CALL, except SVC other instructions
1316 * (SMC, HVC) are taken as sync exceptions.
1318 if (packet->exception_number == CS_ETMV4_EXC_CALL &&
1319 !cs_etm__is_svc_instr(etmq, prev_packet,
1320 prev_packet->end_addr))
1324 * ETMv4 has 5 bits for exception number; if the numbers
1325 * are in the range ( CS_ETMV4_EXC_FIQ, CS_ETMV4_EXC_END ]
1326 * they are implementation defined exceptions.
1328 * For this case, simply take it as sync exception.
1330 if (packet->exception_number > CS_ETMV4_EXC_FIQ &&
1331 packet->exception_number <= CS_ETMV4_EXC_END)
1338 static int cs_etm__set_sample_flags(struct cs_etm_queue *etmq)
1340 struct cs_etm_packet *packet = etmq->packet;
1341 struct cs_etm_packet *prev_packet = etmq->prev_packet;
1345 switch (packet->sample_type) {
1348 * Immediate branch instruction without neither link nor
1349 * return flag, it's normal branch instruction within
1352 if (packet->last_instr_type == OCSD_INSTR_BR &&
1353 packet->last_instr_subtype == OCSD_S_INSTR_NONE) {
1354 packet->flags = PERF_IP_FLAG_BRANCH;
1356 if (packet->last_instr_cond)
1357 packet->flags |= PERF_IP_FLAG_CONDITIONAL;
1361 * Immediate branch instruction with link (e.g. BL), this is
1362 * branch instruction for function call.
1364 if (packet->last_instr_type == OCSD_INSTR_BR &&
1365 packet->last_instr_subtype == OCSD_S_INSTR_BR_LINK)
1366 packet->flags = PERF_IP_FLAG_BRANCH |
1370 * Indirect branch instruction with link (e.g. BLR), this is
1371 * branch instruction for function call.
1373 if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT &&
1374 packet->last_instr_subtype == OCSD_S_INSTR_BR_LINK)
1375 packet->flags = PERF_IP_FLAG_BRANCH |
1379 * Indirect branch instruction with subtype of
1380 * OCSD_S_INSTR_V7_IMPLIED_RET, this is explicit hint for
1381 * function return for A32/T32.
1383 if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT &&
1384 packet->last_instr_subtype == OCSD_S_INSTR_V7_IMPLIED_RET)
1385 packet->flags = PERF_IP_FLAG_BRANCH |
1386 PERF_IP_FLAG_RETURN;
1389 * Indirect branch instruction without link (e.g. BR), usually
1390 * this is used for function return, especially for functions
1391 * within dynamic link lib.
1393 if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT &&
1394 packet->last_instr_subtype == OCSD_S_INSTR_NONE)
1395 packet->flags = PERF_IP_FLAG_BRANCH |
1396 PERF_IP_FLAG_RETURN;
1398 /* Return instruction for function return. */
1399 if (packet->last_instr_type == OCSD_INSTR_BR_INDIRECT &&
1400 packet->last_instr_subtype == OCSD_S_INSTR_V8_RET)
1401 packet->flags = PERF_IP_FLAG_BRANCH |
1402 PERF_IP_FLAG_RETURN;
1405 * Decoder might insert a discontinuity in the middle of
1406 * instruction packets, fixup prev_packet with flag
1407 * PERF_IP_FLAG_TRACE_BEGIN to indicate restarting trace.
1409 if (prev_packet->sample_type == CS_ETM_DISCONTINUITY)
1410 prev_packet->flags |= PERF_IP_FLAG_BRANCH |
1411 PERF_IP_FLAG_TRACE_BEGIN;
1414 * If the previous packet is an exception return packet
1415 * and the return address just follows SVC instuction,
1416 * it needs to calibrate the previous packet sample flags
1417 * as PERF_IP_FLAG_SYSCALLRET.
1419 if (prev_packet->flags == (PERF_IP_FLAG_BRANCH |
1420 PERF_IP_FLAG_RETURN |
1421 PERF_IP_FLAG_INTERRUPT) &&
1422 cs_etm__is_svc_instr(etmq, packet, packet->start_addr))
1423 prev_packet->flags = PERF_IP_FLAG_BRANCH |
1424 PERF_IP_FLAG_RETURN |
1425 PERF_IP_FLAG_SYSCALLRET;
1427 case CS_ETM_DISCONTINUITY:
1429 * The trace is discontinuous, if the previous packet is
1430 * instruction packet, set flag PERF_IP_FLAG_TRACE_END
1431 * for previous packet.
1433 if (prev_packet->sample_type == CS_ETM_RANGE)
1434 prev_packet->flags |= PERF_IP_FLAG_BRANCH |
1435 PERF_IP_FLAG_TRACE_END;
1437 case CS_ETM_EXCEPTION:
1438 ret = cs_etm__get_magic(packet->trace_chan_id, &magic);
1442 /* The exception is for system call. */
1443 if (cs_etm__is_syscall(etmq, magic))
1444 packet->flags = PERF_IP_FLAG_BRANCH |
1446 PERF_IP_FLAG_SYSCALLRET;
1448 * The exceptions are triggered by external signals from bus,
1449 * interrupt controller, debug module, PE reset or halt.
1451 else if (cs_etm__is_async_exception(etmq, magic))
1452 packet->flags = PERF_IP_FLAG_BRANCH |
1454 PERF_IP_FLAG_ASYNC |
1455 PERF_IP_FLAG_INTERRUPT;
1457 * Otherwise, exception is caused by trap, instruction &
1458 * data fault, or alignment errors.
1460 else if (cs_etm__is_sync_exception(etmq, magic))
1461 packet->flags = PERF_IP_FLAG_BRANCH |
1463 PERF_IP_FLAG_INTERRUPT;
1466 * When the exception packet is inserted, since exception
1467 * packet is not used standalone for generating samples
1468 * and it's affiliation to the previous instruction range
1469 * packet; so set previous range packet flags to tell perf
1470 * it is an exception taken branch.
1472 if (prev_packet->sample_type == CS_ETM_RANGE)
1473 prev_packet->flags = packet->flags;
1475 case CS_ETM_EXCEPTION_RET:
1477 * When the exception return packet is inserted, since
1478 * exception return packet is not used standalone for
1479 * generating samples and it's affiliation to the previous
1480 * instruction range packet; so set previous range packet
1481 * flags to tell perf it is an exception return branch.
1483 * The exception return can be for either system call or
1484 * other exception types; unfortunately the packet doesn't
1485 * contain exception type related info so we cannot decide
1486 * the exception type purely based on exception return packet.
1487 * If we record the exception number from exception packet and
1488 * reuse it for excpetion return packet, this is not reliable
1489 * due the trace can be discontinuity or the interrupt can
1490 * be nested, thus the recorded exception number cannot be
1491 * used for exception return packet for these two cases.
1493 * For exception return packet, we only need to distinguish the
1494 * packet is for system call or for other types. Thus the
1495 * decision can be deferred when receive the next packet which
1496 * contains the return address, based on the return address we
1497 * can read out the previous instruction and check if it's a
1498 * system call instruction and then calibrate the sample flag
1501 if (prev_packet->sample_type == CS_ETM_RANGE)
1502 prev_packet->flags = PERF_IP_FLAG_BRANCH |
1503 PERF_IP_FLAG_RETURN |
1504 PERF_IP_FLAG_INTERRUPT;
1514 static int cs_etm__decode_data_block(struct cs_etm_queue *etmq)
1517 size_t processed = 0;
1520 * Packets are decoded and added to the decoder's packet queue
1521 * until the decoder packet processing callback has requested that
1522 * processing stops or there is nothing left in the buffer. Normal
1523 * operations that stop processing are a timestamp packet or a full
1524 * decoder buffer queue.
1526 ret = cs_etm_decoder__process_data_block(etmq->decoder,
1528 &etmq->buf[etmq->buf_used],
1534 etmq->offset += processed;
1535 etmq->buf_used += processed;
1536 etmq->buf_len -= processed;
1542 static int cs_etm__process_decoder_queue(struct cs_etm_queue *etmq)
1546 /* Process each packet in this chunk */
1548 ret = cs_etm_decoder__get_packet(etmq->decoder,
1552 * Stop processing this chunk on
1553 * end of data or error
1558 * Since packet addresses are swapped in packet
1559 * handling within below switch() statements,
1560 * thus setting sample flags must be called
1561 * prior to switch() statement to use address
1562 * information before packets swapping.
1564 ret = cs_etm__set_sample_flags(etmq);
1568 switch (etmq->packet->sample_type) {
1571 * If the packet contains an instruction
1572 * range, generate instruction sequence
1575 cs_etm__sample(etmq);
1577 case CS_ETM_EXCEPTION:
1578 case CS_ETM_EXCEPTION_RET:
1580 * If the exception packet is coming,
1581 * make sure the previous instruction
1582 * range packet to be handled properly.
1584 cs_etm__exception(etmq);
1586 case CS_ETM_DISCONTINUITY:
1588 * Discontinuity in trace, flush
1589 * previous branch stack
1591 cs_etm__flush(etmq);
1595 * Should not receive empty packet,
1598 pr_err("CS ETM Trace: empty packet\n");
1608 static int cs_etm__run_decoder(struct cs_etm_queue *etmq)
1612 /* Go through each buffer in the queue and decode them one by one */
1614 err = cs_etm__get_data_block(etmq);
1618 /* Run trace decoder until buffer consumed or end of trace */
1620 err = cs_etm__decode_data_block(etmq);
1625 * Process each packet in this chunk, nothing to do if
1626 * an error occurs other than hoping the next one will
1629 err = cs_etm__process_decoder_queue(etmq);
1631 } while (etmq->buf_len);
1634 /* Flush any remaining branch stack entries */
1635 err = cs_etm__end_block(etmq);
1641 static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
1645 struct auxtrace_queues *queues = &etm->queues;
1647 for (i = 0; i < queues->nr_queues; i++) {
1648 struct auxtrace_queue *queue = &etm->queues.queue_array[i];
1649 struct cs_etm_queue *etmq = queue->priv;
1651 if (etmq && ((tid == -1) || (etmq->tid == tid))) {
1652 cs_etm__set_pid_tid_cpu(etm, queue);
1653 cs_etm__run_decoder(etmq);
1660 static int cs_etm__process_event(struct perf_session *session,
1661 union perf_event *event,
1662 struct perf_sample *sample,
1663 struct perf_tool *tool)
1667 struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
1668 struct cs_etm_auxtrace,
1674 if (!tool->ordered_events) {
1675 pr_err("CoreSight ETM Trace requires ordered events\n");
1679 if (!etm->timeless_decoding)
1682 if (sample->time && (sample->time != (u64) -1))
1683 timestamp = sample->time;
1687 if (timestamp || etm->timeless_decoding) {
1688 err = cs_etm__update_queues(etm);
1693 if (event->header.type == PERF_RECORD_EXIT)
1694 return cs_etm__process_timeless_queues(etm,
1700 static int cs_etm__process_auxtrace_event(struct perf_session *session,
1701 union perf_event *event,
1702 struct perf_tool *tool __maybe_unused)
1704 struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
1705 struct cs_etm_auxtrace,
1707 if (!etm->data_queued) {
1708 struct auxtrace_buffer *buffer;
1710 int fd = perf_data__fd(session->data);
1711 bool is_pipe = perf_data__is_pipe(session->data);
1717 data_offset = lseek(fd, 0, SEEK_CUR);
1718 if (data_offset == -1)
1722 err = auxtrace_queues__add_event(&etm->queues, session,
1723 event, data_offset, &buffer);
1728 if (auxtrace_buffer__get_data(buffer, fd)) {
1729 cs_etm__dump_event(etm, buffer);
1730 auxtrace_buffer__put_data(buffer);
1737 static bool cs_etm__is_timeless_decoding(struct cs_etm_auxtrace *etm)
1739 struct perf_evsel *evsel;
1740 struct perf_evlist *evlist = etm->session->evlist;
1741 bool timeless_decoding = true;
1744 * Circle through the list of event and complain if we find one
1745 * with the time bit set.
1747 evlist__for_each_entry(evlist, evsel) {
1748 if ((evsel->attr.sample_type & PERF_SAMPLE_TIME))
1749 timeless_decoding = false;
1752 return timeless_decoding;
1755 static const char * const cs_etm_global_header_fmts[] = {
1756 [CS_HEADER_VERSION_0] = " Header version %llx\n",
1757 [CS_PMU_TYPE_CPUS] = " PMU type/num cpus %llx\n",
1758 [CS_ETM_SNAPSHOT] = " Snapshot %llx\n",
1761 static const char * const cs_etm_priv_fmts[] = {
1762 [CS_ETM_MAGIC] = " Magic number %llx\n",
1763 [CS_ETM_CPU] = " CPU %lld\n",
1764 [CS_ETM_ETMCR] = " ETMCR %llx\n",
1765 [CS_ETM_ETMTRACEIDR] = " ETMTRACEIDR %llx\n",
1766 [CS_ETM_ETMCCER] = " ETMCCER %llx\n",
1767 [CS_ETM_ETMIDR] = " ETMIDR %llx\n",
1770 static const char * const cs_etmv4_priv_fmts[] = {
1771 [CS_ETM_MAGIC] = " Magic number %llx\n",
1772 [CS_ETM_CPU] = " CPU %lld\n",
1773 [CS_ETMV4_TRCCONFIGR] = " TRCCONFIGR %llx\n",
1774 [CS_ETMV4_TRCTRACEIDR] = " TRCTRACEIDR %llx\n",
1775 [CS_ETMV4_TRCIDR0] = " TRCIDR0 %llx\n",
1776 [CS_ETMV4_TRCIDR1] = " TRCIDR1 %llx\n",
1777 [CS_ETMV4_TRCIDR2] = " TRCIDR2 %llx\n",
1778 [CS_ETMV4_TRCIDR8] = " TRCIDR8 %llx\n",
1779 [CS_ETMV4_TRCAUTHSTATUS] = " TRCAUTHSTATUS %llx\n",
1782 static void cs_etm__print_auxtrace_info(u64 *val, int num)
1786 for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++)
1787 fprintf(stdout, cs_etm_global_header_fmts[i], val[i]);
1789 for (i = CS_HEADER_VERSION_0_MAX; cpu < num; cpu++) {
1790 if (val[i] == __perf_cs_etmv3_magic)
1791 for (j = 0; j < CS_ETM_PRIV_MAX; j++, i++)
1792 fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
1793 else if (val[i] == __perf_cs_etmv4_magic)
1794 for (j = 0; j < CS_ETMV4_PRIV_MAX; j++, i++)
1795 fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
1797 /* failure.. return */
1802 int cs_etm__process_auxtrace_info(union perf_event *event,
1803 struct perf_session *session)
1805 struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
1806 struct cs_etm_auxtrace *etm = NULL;
1807 struct int_node *inode;
1808 unsigned int pmu_type;
1809 int event_header_size = sizeof(struct perf_event_header);
1810 int info_header_size;
1811 int total_size = auxtrace_info->header.size;
1814 int err = 0, idx = -1;
1816 u64 *ptr, *hdr = NULL;
1817 u64 **metadata = NULL;
1820 * sizeof(auxtrace_info_event::type) +
1821 * sizeof(auxtrace_info_event::reserved) == 8
1823 info_header_size = 8;
1825 if (total_size < (event_header_size + info_header_size))
1828 priv_size = total_size - event_header_size - info_header_size;
1830 /* First the global part */
1831 ptr = (u64 *) auxtrace_info->priv;
1833 /* Look for version '0' of the header */
1837 hdr = zalloc(sizeof(*hdr) * CS_HEADER_VERSION_0_MAX);
1841 /* Extract header information - see cs-etm.h for format */
1842 for (i = 0; i < CS_HEADER_VERSION_0_MAX; i++)
1844 num_cpu = hdr[CS_PMU_TYPE_CPUS] & 0xffffffff;
1845 pmu_type = (unsigned int) ((hdr[CS_PMU_TYPE_CPUS] >> 32) &
1849 * Create an RB tree for traceID-metadata tuple. Since the conversion
1850 * has to be made for each packet that gets decoded, optimizing access
1851 * in anything other than a sequential array is worth doing.
1853 traceid_list = intlist__new(NULL);
1854 if (!traceid_list) {
1859 metadata = zalloc(sizeof(*metadata) * num_cpu);
1862 goto err_free_traceid_list;
1866 * The metadata is stored in the auxtrace_info section and encodes
1867 * the configuration of the ARM embedded trace macrocell which is
1868 * required by the trace decoder to properly decode the trace due
1869 * to its highly compressed nature.
1871 for (j = 0; j < num_cpu; j++) {
1872 if (ptr[i] == __perf_cs_etmv3_magic) {
1873 metadata[j] = zalloc(sizeof(*metadata[j]) *
1877 goto err_free_metadata;
1879 for (k = 0; k < CS_ETM_PRIV_MAX; k++)
1880 metadata[j][k] = ptr[i + k];
1882 /* The traceID is our handle */
1883 idx = metadata[j][CS_ETM_ETMTRACEIDR];
1884 i += CS_ETM_PRIV_MAX;
1885 } else if (ptr[i] == __perf_cs_etmv4_magic) {
1886 metadata[j] = zalloc(sizeof(*metadata[j]) *
1890 goto err_free_metadata;
1892 for (k = 0; k < CS_ETMV4_PRIV_MAX; k++)
1893 metadata[j][k] = ptr[i + k];
1895 /* The traceID is our handle */
1896 idx = metadata[j][CS_ETMV4_TRCTRACEIDR];
1897 i += CS_ETMV4_PRIV_MAX;
1900 /* Get an RB node for this CPU */
1901 inode = intlist__findnew(traceid_list, idx);
1903 /* Something went wrong, no need to continue */
1905 err = PTR_ERR(inode);
1906 goto err_free_metadata;
1910 * The node for that CPU should not be taken.
1911 * Back out if that's the case.
1915 goto err_free_metadata;
1917 /* All good, associate the traceID with the metadata pointer */
1918 inode->priv = metadata[j];
1922 * Each of CS_HEADER_VERSION_0_MAX, CS_ETM_PRIV_MAX and
1923 * CS_ETMV4_PRIV_MAX mark how many double words are in the
1924 * global metadata, and each cpu's metadata respectively.
1925 * The following tests if the correct number of double words was
1926 * present in the auxtrace info section.
1928 if (i * 8 != priv_size) {
1930 goto err_free_metadata;
1933 etm = zalloc(sizeof(*etm));
1937 goto err_free_metadata;
1940 err = auxtrace_queues__init(&etm->queues);
1944 etm->session = session;
1945 etm->machine = &session->machines.host;
1947 etm->num_cpu = num_cpu;
1948 etm->pmu_type = pmu_type;
1949 etm->snapshot_mode = (hdr[CS_ETM_SNAPSHOT] != 0);
1950 etm->metadata = metadata;
1951 etm->auxtrace_type = auxtrace_info->type;
1952 etm->timeless_decoding = cs_etm__is_timeless_decoding(etm);
1954 etm->auxtrace.process_event = cs_etm__process_event;
1955 etm->auxtrace.process_auxtrace_event = cs_etm__process_auxtrace_event;
1956 etm->auxtrace.flush_events = cs_etm__flush_events;
1957 etm->auxtrace.free_events = cs_etm__free_events;
1958 etm->auxtrace.free = cs_etm__free;
1959 session->auxtrace = &etm->auxtrace;
1961 etm->unknown_thread = thread__new(999999999, 999999999);
1962 if (!etm->unknown_thread)
1963 goto err_free_queues;
1966 * Initialize list node so that at thread__zput() we can avoid
1967 * segmentation fault at list_del_init().
1969 INIT_LIST_HEAD(&etm->unknown_thread->node);
1971 err = thread__set_comm(etm->unknown_thread, "unknown", 0);
1973 goto err_delete_thread;
1975 if (thread__init_map_groups(etm->unknown_thread, etm->machine))
1976 goto err_delete_thread;
1979 cs_etm__print_auxtrace_info(auxtrace_info->priv, num_cpu);
1983 if (session->itrace_synth_opts && session->itrace_synth_opts->set) {
1984 etm->synth_opts = *session->itrace_synth_opts;
1986 itrace_synth_opts__set_default(&etm->synth_opts,
1987 session->itrace_synth_opts->default_no_sample);
1988 etm->synth_opts.callchain = false;
1991 err = cs_etm__synth_events(etm, session);
1993 goto err_delete_thread;
1995 err = auxtrace_queues__process_index(&etm->queues, session);
1997 goto err_delete_thread;
1999 etm->data_queued = etm->queues.populated;
2004 thread__zput(etm->unknown_thread);
2006 auxtrace_queues__free(&etm->queues);
2007 session->auxtrace = NULL;
2011 /* No need to check @metadata[j], free(NULL) is supported */
2012 for (j = 0; j < num_cpu; j++)
2015 err_free_traceid_list:
2016 intlist__delete(traceid_list);