Mathieu Poirier [off-list ref] writes:

This patchset aims to integrate configuration and control of
the Coresight tracers with the perf sub-system.

The goal is to use PMUs to represent tracers and the auxiliary
buffer enhancement to collect processor traces.  As such a lot
of work is done to move the current Coresight sysFS oriented
configuration and control commands to perf's AUX API.

Another general question: is there anything that prevents a sysfs user
from changing ETM/ETB configuration while it's used by a perf event? I
couldn't find any code in this patchset that would implement such
exclusivity.

Thanks,
--
Alex