Software tracepoints use an interrupt to start and stop trace. You can update your project either manually or automatically to add support of software tracepoints for collecting trace data on the Kinetis target.
Note: Do not use hardware tracepoints and software tracepoints together as they do not work simultaneously. This is because hardware tracepoints require ETM enabled, which only happens when a start software tracepoint is hit. And ETM logic has to be disabled by default when using a software tracepoint since ETM is enabled from the software interrupt code.