For the 2018.2 tools, I just finished getting the rpmsg-proxy-app working concurrently. The version of the proxy_app.c file in the Xilinx meta-openamp GitHub repo will not work for running on both R5-0 and R5-1 concurrently.
Couple of notes:
* I use gtkterm for the console and to run the R5-0 app
* I ssh to the machine to run the R5-0 app
* I changed the name of the firmware to match what I call it
* It's not 100% cleaned up, there are still console messages for the R5-1 session which show up in the R5-0 session
I've attached my edited version of proxy_app.c which works concurrently on both R5s: