[PATCH 22/44] coresight: etm-perf: Add support for ETR backend

From: Suzuki K Poulose Add support for using TMC-ETR as backend for ETM perf tracing. We use software double buffering at the moment. i.e, the TMC-ETR uses a separate buffer than the perf ring buffer. The data is copied to the perf ring buffer once a session completes. The TMC-ETR would try to

[PATCH 22/44] coresight: etm-perf: Add support for ETR backend

From: Suzuki K Poulose Add support for using TMC-ETR as backend for ETM perf tracing. We use software double buffering at the moment. i.e, the TMC-ETR uses a separate buffer than the perf ring buffer. The data is copied to the perf ring buffer once a session completes. The TMC-ETR would try to