enabling coresight etm on hikey

Hi,

we started looking at how to enable collection of branch traces with coresight etm on the hikey boards that are the reference platform for the android linux-4.9 work. Does somebody from Linaro have access to the description of where the coresight components are located for the hikey devices? We would appreciate help on enabling linux-perf collection of traces on the hikey.

Thanks, Sebastian