NXP iMX8QM can not trace to DDR by ETR TMC

Hi ARM:

I am using Arm development studio（Dstream debugger） trace For iMX8QM, using ETR trace to system Mem， but it Cannot work.

But it can debug by Jtag

The config is below:

In Linux Kernel, I have make the 0x880000000 reserved, and cannot visable by linux.

The Chip is broken or any other issue?

Thanks very much.