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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
Eroding a bit more the tools/perf/util/util.h hodpodge header. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-natazosyn9rwjka25tvcnyi0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
231 lines
5.3 KiB
C
231 lines
5.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Arm Statistical Profiling Extensions (SPE) support
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* Copyright (c) 2017-2018, Arm Ltd.
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*/
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#include <endian.h>
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#include <errno.h>
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#include <byteswap.h>
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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#include <linux/zalloc.h>
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#include "cpumap.h"
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#include "color.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "machine.h"
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#include "session.h"
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#include "thread.h"
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#include "debug.h"
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#include "auxtrace.h"
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#include "arm-spe.h"
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#include "arm-spe-pkt-decoder.h"
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struct arm_spe {
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struct auxtrace auxtrace;
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struct auxtrace_queues queues;
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struct auxtrace_heap heap;
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u32 auxtrace_type;
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struct perf_session *session;
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struct machine *machine;
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u32 pmu_type;
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};
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struct arm_spe_queue {
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struct arm_spe *spe;
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unsigned int queue_nr;
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struct auxtrace_buffer *buffer;
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bool on_heap;
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bool done;
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pid_t pid;
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pid_t tid;
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int cpu;
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};
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static void arm_spe_dump(struct arm_spe *spe __maybe_unused,
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unsigned char *buf, size_t len)
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{
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struct arm_spe_pkt packet;
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size_t pos = 0;
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int ret, pkt_len, i;
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char desc[ARM_SPE_PKT_DESC_MAX];
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const char *color = PERF_COLOR_BLUE;
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color_fprintf(stdout, color,
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". ... ARM SPE data: size %zu bytes\n",
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len);
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while (len) {
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ret = arm_spe_get_packet(buf, len, &packet);
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if (ret > 0)
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pkt_len = ret;
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else
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pkt_len = 1;
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printf(".");
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color_fprintf(stdout, color, " %08x: ", pos);
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for (i = 0; i < pkt_len; i++)
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color_fprintf(stdout, color, " %02x", buf[i]);
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for (; i < 16; i++)
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color_fprintf(stdout, color, " ");
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if (ret > 0) {
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ret = arm_spe_pkt_desc(&packet, desc,
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ARM_SPE_PKT_DESC_MAX);
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if (ret > 0)
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color_fprintf(stdout, color, " %s\n", desc);
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} else {
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color_fprintf(stdout, color, " Bad packet!\n");
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}
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pos += pkt_len;
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buf += pkt_len;
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len -= pkt_len;
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}
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}
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static void arm_spe_dump_event(struct arm_spe *spe, unsigned char *buf,
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size_t len)
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{
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printf(".\n");
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arm_spe_dump(spe, buf, len);
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}
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static int arm_spe_process_event(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused,
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struct perf_tool *tool __maybe_unused)
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{
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return 0;
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}
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static int arm_spe_process_auxtrace_event(struct perf_session *session,
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union perf_event *event,
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struct perf_tool *tool __maybe_unused)
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{
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struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
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auxtrace);
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struct auxtrace_buffer *buffer;
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off_t data_offset;
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int fd = perf_data__fd(session->data);
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int err;
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if (perf_data__is_pipe(session->data)) {
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data_offset = 0;
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} else {
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data_offset = lseek(fd, 0, SEEK_CUR);
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if (data_offset == -1)
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return -errno;
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}
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err = auxtrace_queues__add_event(&spe->queues, session, event,
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data_offset, &buffer);
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if (err)
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return err;
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/* Dump here now we have copied a piped trace out of the pipe */
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if (dump_trace) {
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if (auxtrace_buffer__get_data(buffer, fd)) {
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arm_spe_dump_event(spe, buffer->data,
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buffer->size);
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auxtrace_buffer__put_data(buffer);
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}
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}
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return 0;
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}
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static int arm_spe_flush(struct perf_session *session __maybe_unused,
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struct perf_tool *tool __maybe_unused)
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{
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return 0;
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}
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static void arm_spe_free_queue(void *priv)
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{
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struct arm_spe_queue *speq = priv;
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if (!speq)
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return;
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free(speq);
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}
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static void arm_spe_free_events(struct perf_session *session)
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{
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struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
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auxtrace);
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struct auxtrace_queues *queues = &spe->queues;
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unsigned int i;
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for (i = 0; i < queues->nr_queues; i++) {
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arm_spe_free_queue(queues->queue_array[i].priv);
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queues->queue_array[i].priv = NULL;
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}
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auxtrace_queues__free(queues);
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}
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static void arm_spe_free(struct perf_session *session)
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{
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struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
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auxtrace);
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auxtrace_heap__free(&spe->heap);
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arm_spe_free_events(session);
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session->auxtrace = NULL;
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free(spe);
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}
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static const char * const arm_spe_info_fmts[] = {
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[ARM_SPE_PMU_TYPE] = " PMU Type %"PRId64"\n",
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};
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static void arm_spe_print_info(u64 *arr)
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{
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if (!dump_trace)
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return;
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fprintf(stdout, arm_spe_info_fmts[ARM_SPE_PMU_TYPE], arr[ARM_SPE_PMU_TYPE]);
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}
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int arm_spe_process_auxtrace_info(union perf_event *event,
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struct perf_session *session)
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{
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struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
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size_t min_sz = sizeof(u64) * ARM_SPE_PMU_TYPE;
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struct arm_spe *spe;
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int err;
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if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
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min_sz)
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return -EINVAL;
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spe = zalloc(sizeof(struct arm_spe));
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if (!spe)
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return -ENOMEM;
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err = auxtrace_queues__init(&spe->queues);
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if (err)
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goto err_free;
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spe->session = session;
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spe->machine = &session->machines.host; /* No kvm support */
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spe->auxtrace_type = auxtrace_info->type;
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spe->pmu_type = auxtrace_info->priv[ARM_SPE_PMU_TYPE];
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spe->auxtrace.process_event = arm_spe_process_event;
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spe->auxtrace.process_auxtrace_event = arm_spe_process_auxtrace_event;
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spe->auxtrace.flush_events = arm_spe_flush;
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spe->auxtrace.free_events = arm_spe_free_events;
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spe->auxtrace.free = arm_spe_free;
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session->auxtrace = &spe->auxtrace;
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arm_spe_print_info(&auxtrace_info->priv[0]);
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return 0;
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err_free:
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free(spe);
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return err;
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}
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