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

MacOS stm32f3discovery: impossible to load

Based on the console output you’ve provided, it appears that you do not have your project configured to build for the right target MCU.

Navigate to Project -> Properties -> C/C++ Build -> Settings -> Target

Verify that the ‘board’ setting matches the board or MCU device you’re using.

There should be a pre-configured “board” definition for the STM32F3 Discovery, but I can’t say for certain because I’ve never tried selecting it.

In any event, the debugger is refusing to start up because the “idcode” of your target MCU does not match what the debugger is expecting to see.