SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32

cannot find entry symbol Reset_Handler; defaulting to 08000000

I would like to add: startup file may be copied from any example project for corresponding Nucleo board. Just need to make sure it is the one created for the same toolchain, otherwise it won’t work... as it happened to me until I realised my mistake...hours later