diff options
| author | James Clark <james.clark@linaro.org> | 2025-11-28 11:55:16 +0000 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2025-12-22 15:30:53 +0000 |
| commit | 20bc2ea23774a7655d21ce2243eccfdfd4405279 (patch) | |
| tree | 14b45a2b994dd072d8421376a6fbb2264a94cd00 /drivers | |
| parent | b02450de6ba6309c66e2e056ccfbfce4bd3b0352 (diff) | |
coresight: Hide unused ETMv3 format attributes
ETMv3 only has a few attributes, and setting unused ones results in an
error, so hide them to begin with.
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Tested-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251128-james-cs-syncfreq-v8-4-4d319764cc58@linaro.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm-perf.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index 17afa0f4cdee..3805282b97e8 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -50,27 +50,23 @@ struct etm_ctxt { static DEFINE_PER_CPU(struct etm_ctxt, etm_ctxt); static DEFINE_PER_CPU(struct coresight_device *, csdev_src); -/* - * The PMU formats were orignally for ETMv3.5/PTM's ETMCR 'config'; - * now take them as general formats and apply on all ETMs. - */ -PMU_FORMAT_ATTR(branch_broadcast, "config:"__stringify(ETM_OPT_BRANCH_BROADCAST)); PMU_FORMAT_ATTR(cycacc, "config:" __stringify(ETM_OPT_CYCACC)); -/* contextid1 enables tracing CONTEXTIDR_EL1 for ETMv4 */ -PMU_FORMAT_ATTR(contextid1, "config:" __stringify(ETM_OPT_CTXTID)); -/* contextid2 enables tracing CONTEXTIDR_EL2 for ETMv4 */ -PMU_FORMAT_ATTR(contextid2, "config:" __stringify(ETM_OPT_CTXTID2)); PMU_FORMAT_ATTR(timestamp, "config:" __stringify(ETM_OPT_TS)); PMU_FORMAT_ATTR(retstack, "config:" __stringify(ETM_OPT_RETSTK)); +PMU_FORMAT_ATTR(sinkid, "config2:0-31"); + +#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) +PMU_FORMAT_ATTR(branch_broadcast, "config:"__stringify(ETM_OPT_BRANCH_BROADCAST)); +/* contextid1 enables tracing CONTEXTIDR_EL1*/ +PMU_FORMAT_ATTR(contextid1, "config:" __stringify(ETM_OPT_CTXTID)); +/* contextid2 enables tracing CONTEXTIDR_EL2*/ +PMU_FORMAT_ATTR(contextid2, "config:" __stringify(ETM_OPT_CTXTID2)); /* preset - if sink ID is used as a configuration selector */ PMU_FORMAT_ATTR(preset, "config:0-3"); -/* Sink ID - same for all ETMs */ -PMU_FORMAT_ATTR(sinkid, "config2:0-31"); /* config ID - set if a system configuration is selected */ PMU_FORMAT_ATTR(configid, "config2:32-63"); PMU_FORMAT_ATTR(cc_threshold, "config3:0-11"); - /* * contextid always traces the "PID". The PID is in CONTEXTIDR_EL1 * when the kernel is running at EL1; when the kernel is at EL2, @@ -82,27 +78,34 @@ static ssize_t format_attr_contextid_show(struct device *dev, { int pid_fmt = ETM_OPT_CTXTID; -#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) pid_fmt = is_kernel_in_hyp_mode() ? ETM_OPT_CTXTID2 : ETM_OPT_CTXTID; -#endif return sprintf(page, "config:%d\n", pid_fmt); } static struct device_attribute format_attr_contextid = __ATTR(contextid, 0444, format_attr_contextid_show, NULL); +#endif +/* + * ETMv3 only uses the first 3 attributes for programming itself (see + * ETM3X_SUPPORTED_OPTIONS). Sink ID is also supported for selecting a + * sink in both, but not used for configuring the ETM. The remaining + * attributes are ETMv4 specific. + */ static struct attribute *etm_config_formats_attr[] = { &format_attr_cycacc.attr, - &format_attr_contextid.attr, - &format_attr_contextid1.attr, - &format_attr_contextid2.attr, &format_attr_timestamp.attr, &format_attr_retstack.attr, &format_attr_sinkid.attr, +#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM4X) + &format_attr_contextid.attr, + &format_attr_contextid1.attr, + &format_attr_contextid2.attr, &format_attr_preset.attr, &format_attr_configid.attr, &format_attr_branch_broadcast.attr, &format_attr_cc_threshold.attr, +#endif NULL, }; |