Hi,
I was able build iMX8MP sdk examples on cortex-M core by following the below links
Hello,
Maybe you should take a look on multicore examples with rpmsg in the SDK demo apps, such as: rpmsg_lite_pingpong_rtos_linux_remote or rpmsg_lite_str_echo_rtos_imxcm7.
For more details please check i.MX Linux Reference Manual, on section 2.8 Remote Processor Messaging.
Best regards.