From: Leo Yan leo.yan@linaro.org

TRACE_ON element is used at the beginning of trace, it also can be appeared in the middle of trace data to indicate discontinuity; for example, it's possible to see multiple TRACE_ON elements in the trace stream if the trace is being limited by address range filtering.

Furthermore, except TRACE_ON element is for discontinuity, NO_SYNC and EO_TRACE also can be used to indicate discontinuity, though they are used for different scenarios for which the trace is interrupted.

This patch renames sample type CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITY, firstly the new name describes more closely the purpose of the packet; secondly this is a preparation for other output elements which also cause the trace discontinuity thus they can share the same one packet type.

Signed-off-by: Leo Yan leo.yan@linaro.org Reviewed-by: Mathieu Poirier mathieu.poirier@linaro.org Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Jiri Olsa jolsa@redhat.com Cc: Mike Leach mike.leach@linaro.org Cc: Namhyung Kim namhyung@kernel.org Cc: Robert Walker robert.walker@arm.com Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-6-git-send-email-leo.yan@linaro.or... Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com --- tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 10 +++++----- tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 2 +- tools/perf/util/cs-etm.c | 12 ++++++------ 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 97b39b1f5759..1039f364f4cc 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -390,11 +390,11 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder, }

static ocsd_datapath_resp_t -cs_etm_decoder__buffer_trace_on(struct cs_etm_decoder *decoder, - const uint8_t trace_chan_id) +cs_etm_decoder__buffer_discontinuity(struct cs_etm_decoder *decoder, + const uint8_t trace_chan_id) { return cs_etm_decoder__buffer_packet(decoder, trace_chan_id, - CS_ETM_TRACE_ON); + CS_ETM_DISCONTINUITY); }

static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( @@ -412,8 +412,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( case OCSD_GEN_TRC_ELEM_NO_SYNC: break; case OCSD_GEN_TRC_ELEM_TRACE_ON: - resp = cs_etm_decoder__buffer_trace_on(decoder, - trace_chan_id); + resp = cs_etm_decoder__buffer_discontinuity(decoder, + trace_chan_id); break; case OCSD_GEN_TRC_ELEM_INSTR_RANGE: resp = cs_etm_decoder__buffer_range(decoder, elem, diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h index 3819a04a2c27..a27231722e27 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h @@ -25,7 +25,7 @@ struct cs_etm_buffer { enum cs_etm_sample_type { CS_ETM_EMPTY, CS_ETM_RANGE, - CS_ETM_TRACE_ON, + CS_ETM_DISCONTINUITY, };

enum cs_etm_isa { diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index ffc4fe5c0b7e..cea3158915d3 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -562,8 +562,8 @@ static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq,

static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) { - /* Returns 0 for the CS_ETM_TRACE_ON packet */ - if (packet->sample_type == CS_ETM_TRACE_ON) + /* Returns 0 for the CS_ETM_DISCONTINUITY packet */ + if (packet->sample_type == CS_ETM_DISCONTINUITY) return 0;

return packet->start_addr; @@ -572,8 +572,8 @@ static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) static inline u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet) { - /* Returns 0 for the CS_ETM_TRACE_ON packet */ - if (packet->sample_type == CS_ETM_TRACE_ON) + /* Returns 0 for the CS_ETM_DISCONTINUITY packet */ + if (packet->sample_type == CS_ETM_DISCONTINUITY) return 0;

return packet->end_addr - packet->last_instr_size; @@ -972,7 +972,7 @@ static int cs_etm__sample(struct cs_etm_queue *etmq) bool generate_sample = false;

/* Generate sample for tracing on packet */ - if (etmq->prev_packet->sample_type == CS_ETM_TRACE_ON) + if (etmq->prev_packet->sample_type == CS_ETM_DISCONTINUITY) generate_sample = true;

/* Generate sample for branch taken packet */ @@ -1148,7 +1148,7 @@ static int cs_etm__run_decoder(struct cs_etm_queue *etmq) */ cs_etm__sample(etmq); break; - case CS_ETM_TRACE_ON: + case CS_ETM_DISCONTINUITY: /* * Discontinuity in trace, flush * previous branch stack