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perf tools: Add support for decoding CoreSight trace data

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Adding functionality to create a CoreSight trace decoder capable
of decoding trace data pushed by a client application.

Co-authored-by: Tor Jeremiassen <tor@ti.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Mike Leach <mike.leach@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1516211539-5166-6-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2018-01-17 10:52:14 -07:00 committed by Arnaldo Carvalho de Melo
parent 68ffe39028
commit c9a01a11df
1 changed files with 119 additions and 0 deletions
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119
tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
View File

@ -200,6 +200,121 @@ static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder)
}
}
static ocsd_datapath_resp_t
cs_etm_decoder__buffer_packet(struct cs_etm_decoder *decoder,
const ocsd_generic_trace_elem *elem,
const u8 trace_chan_id,
enum cs_etm_sample_type sample_type)
{
u32 et = 0;
struct int_node *inode = NULL;
if (decoder->packet_count >= MAX_BUFFER - 1)
return OCSD_RESP_FATAL_SYS_ERR;
/* Search the RB tree for the cpu associated with this traceID */
inode = intlist__find(traceid_list, trace_chan_id);
if (!inode)
return OCSD_RESP_FATAL_SYS_ERR;
et = decoder->tail;
decoder->packet_buffer[et].sample_type = sample_type;
decoder->packet_buffer[et].start_addr = elem->st_addr;
decoder->packet_buffer[et].end_addr = elem->en_addr;
decoder->packet_buffer[et].exc = false;
decoder->packet_buffer[et].exc_ret = false;
decoder->packet_buffer[et].cpu = *((int *)inode->priv);
/* Wrap around if need be */
et = (et + 1) & (MAX_BUFFER - 1);
decoder->tail = et;
decoder->packet_count++;
if (decoder->packet_count == MAX_BUFFER - 1)
return OCSD_RESP_WAIT;
return OCSD_RESP_CONT;
}
static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
const void *context,
const ocsd_trc_index_t indx __maybe_unused,
const u8 trace_chan_id __maybe_unused,
const ocsd_generic_trace_elem *elem)
{
ocsd_datapath_resp_t resp = OCSD_RESP_CONT;
struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;
switch (elem->elem_type) {
case OCSD_GEN_TRC_ELEM_UNKNOWN:
break;
case OCSD_GEN_TRC_ELEM_NO_SYNC:
decoder->trace_on = false;
break;
case OCSD_GEN_TRC_ELEM_TRACE_ON:
decoder->trace_on = true;
break;
case OCSD_GEN_TRC_ELEM_INSTR_RANGE:
resp = cs_etm_decoder__buffer_packet(decoder, elem,
trace_chan_id,
CS_ETM_RANGE);
break;
case OCSD_GEN_TRC_ELEM_EXCEPTION:
decoder->packet_buffer[decoder->tail].exc = true;
break;
case OCSD_GEN_TRC_ELEM_EXCEPTION_RET:
decoder->packet_buffer[decoder->tail].exc_ret = true;
break;
case OCSD_GEN_TRC_ELEM_PE_CONTEXT:
case OCSD_GEN_TRC_ELEM_EO_TRACE:
case OCSD_GEN_TRC_ELEM_ADDR_NACC:
case OCSD_GEN_TRC_ELEM_TIMESTAMP:
case OCSD_GEN_TRC_ELEM_CYCLE_COUNT:
case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN:
case OCSD_GEN_TRC_ELEM_EVENT:
case OCSD_GEN_TRC_ELEM_SWTRACE:
case OCSD_GEN_TRC_ELEM_CUSTOM:
default:
break;
}
return resp;
}
static int cs_etm_decoder__create_etm_packet_decoder(
struct cs_etm_trace_params *t_params,
struct cs_etm_decoder *decoder)
{
const char *decoder_name;
ocsd_etmv4_cfg trace_config_etmv4;
void *trace_config;
u8 csid;
switch (t_params->protocol) {
case CS_ETM_PROTO_ETMV4i:
cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
trace_config = &trace_config_etmv4;
break;
default:
return -1;
}
if (ocsd_dt_create_decoder(decoder->dcd_tree,
decoder_name,
OCSD_CREATE_FLG_FULL_DECODER,
trace_config, &csid))
return -1;
if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,
cs_etm_decoder__gen_trace_elem_printer,
decoder))
return -1;
return 0;
}
static int
cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
struct cs_etm_trace_params *t_params,
@ -208,6 +323,10 @@ cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
if (d_params->operation == CS_ETM_OPERATION_PRINT)
return cs_etm_decoder__create_etm_packet_printer(t_params,
decoder);
else if (d_params->operation == CS_ETM_OPERATION_DECODE)
return cs_etm_decoder__create_etm_packet_decoder(t_params,
decoder);
return -1;
}