The FwST-M Packages (firmwares), running on the Arm® Cortex®-M processor, are a sub-part of the "Linux®-based" embedded software distributions (e.g., Yocto-based OpenSTLinux embedded software) from the STM32 MPU embedded software offer, and are only supported for STM32MP15x lines 
and STM32MP2 series.
They are made up of:
- a STM32CubeMPU Package, running on the Arm® Cortex®-M in non secure mode: STM32CubeMP15_Package for STM32MP15x lines , STM32CubeMP2_Package for STM32MP2 series
- the Trusted Firmware Cortex-M Package running on the Arm® Cortex®-M in secure mode (only for STM32MP2 series)
These packages are built through the STM32CubeIDE toolchain.
Arm® is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere. 
Arm® is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.