config MSM_QDSS bool "CoreSight tracing" help Enables support for CoreSight tracing. This uses CoreSight trace components and buses to support both hardware (eg. processor ETM) and hardware assisted software instrumentation based (eg. STM) tracing. For production builds, you should probably say 'N' here to avoid potential power, performance and memory penalty. config MSM_QDSS_STM_DEFAULT_ENABLE bool "Turn on CoreSight STM tracing by default" depends on MSM_QDSS help Turns on CoreSight STM tracing (hardware assisted software instrumentation based tracing) by default. Otherwise, tracing is disabled by default but can be enabled via sysfs. For production builds, you should probably say 'N' here to avoid potential power, performance and memory penalty. config MSM_QDSS_ETM_DEFAULT_ENABLE bool "Turn on CoreSight ETM tracing by default" depends on MSM_QDSS help Turns on CoreSight ETM tracing (processor tracing) by default. Otherwise, tracing is disabled by default but can be enabled via sysfs. For production builds, you should probably say 'N' here to avoid potential power, performance and memory penalty.