diff options
| author | Mathieu Poirier | 2019-04-25 13:52:52 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-04-25 22:00:16 +0200 |
| commit | 82500a810ee26ac542d128499d7adae163e61adb (patch) | |
| tree | 4d2b991056f39067e7aa75fe41efe3fe06a83d7b /drivers/hwtracing | |
| parent | 6fcdba33ab0d43e5fcb557897c1c81541927f615 (diff) | |
coresight: etm4x: Add kernel configuration for CONTEXTID
Set the proper bit in the configuration register when contextID tracing
has been requested by user space. That way PE_CONTEXT elements are
generated by the tracers when a process is installed on a CPU.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm-perf.c | 2 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x.c | 5 |
3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig index a40d796f0a4b..18e8d03321d6 100644 --- a/drivers/hwtracing/coresight/Kconfig +++ b/drivers/hwtracing/coresight/Kconfig @@ -75,6 +75,7 @@ config CORESIGHT_SOURCE_ETM4X bool "CoreSight Embedded Trace Macrocell 4.x driver" depends on ARM64 select CORESIGHT_LINKS_AND_SINKS + select PID_IN_CONTEXTIDR help This driver provides support for the ETM4.x tracer module, tracing the instructions that a processor is executing. This is primarily useful diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 25ae56e924bb..bbfed70b3402 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -29,6 +29,7 @@ static DEFINE_PER_CPU(struct coresight_device *, csdev_src); /* ETMv3.5/PTM's ETMCR is 'config' */ PMU_FORMAT_ATTR(cycacc, "config:" __stringify(ETM_OPT_CYCACC)); +PMU_FORMAT_ATTR(contextid, "config:" __stringify(ETM_OPT_CTXTID)); PMU_FORMAT_ATTR(timestamp, "config:" __stringify(ETM_OPT_TS)); PMU_FORMAT_ATTR(retstack, "config:" __stringify(ETM_OPT_RETSTK)); /* Sink ID - same for all ETMs */ @@ -36,6 +37,7 @@ PMU_FORMAT_ATTR(sinkid, "config2:0-31"); static struct attribute *etm_config_formats_attr[] = { &format_attr_cycacc.attr, + &format_attr_contextid.attr, &format_attr_timestamp.attr, &format_attr_retstack.attr, &format_attr_sinkid.attr, diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 08ce37c9475d..732ae12fca9b 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -239,6 +239,11 @@ static int etm4_parse_event_config(struct etmv4_drvdata *drvdata, if (attr->config & BIT(ETM_OPT_TS)) /* bit[11], Global timestamp tracing bit */ config->cfg |= BIT(11); + + if (attr->config & BIT(ETM_OPT_CTXTID)) + /* bit[6], Context ID tracing bit */ + config->cfg |= BIT(ETM4_CFG_BIT_CTXTID); + /* return stack - enable if selected and supported */ if ((attr->config & BIT(ETM_OPT_RETSTK)) && drvdata->retstack) /* bit[12], Return stack enable bit */ |