using trace under linux

Hi, I have a question about tracing on cortex A.I have a plateform based on 2 cortex A7,and I need to trace the executed application. How can I activate the trace under linux (without using external hardware) to access to coresight components (STM,ETM,PTM,CTI,ETF...) and configure  them as well as the extraction of the datas trace ?Could you please describe the differents steps that allow me to trace my application and what is the librairie should be used for the trace? Best regards Karim.