CONFIG_CORESIGHT_SOURCE_ETM3X is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_CORESIGHT_SOURCE_ETM3X.
Result is shown for kernelversion 5.4.159

CoreSight Embedded Trace Macrocell 3.x driver

modulename: coresight-etm3x.ko

configname: CONFIG_CORESIGHT_SOURCE_ETM3X

Linux Kernel Configuration
└─>Kernel hacking
└─>CoreSight Tracing Support
└─>CoreSight Embedded Trace Macrocell 3.x driver
In linux kernel since version 3.19 (release Date: 2015-02-08)  
This driver provides support for processor ETM3.x and PTM1.x modules,
which allows tracing the instructions that a processor is executing
This is primarily useful for instruction level tracing. Depending
the ETM version data tracing may also be available.

source code: