Re:rpi-open-firmware: open-source VPU side bootloader for Ra...
by cpgxiii on Wednesday February 24, 2021 @11:13PM
(#26259623)
>clean up the ARM/Microsoft dumpster fire that virtualizes a guest
The VPU does not operate as a hypervisor for the OS running on the ARM cores. Its role is equivalent to a hybrid of platform management (like Intel ME/AMD PSP/POWER SBE) and video processing.
The dumpster fire here is entirely Broadcom's responsibility. Microsoft is only indirectly involved in the VPU firmware by way of acquiring ThreadX many years after the RPi project started. Had Microsoft actually been involved in the project, the RPi would likely meet the ARM SBSA and boot via standard UEFI+ACPI than its Broadcom weirdness.
The VPU does not operate as a hypervisor for the OS running on the ARM cores. Its role is equivalent to a hybrid of platform management (like Intel ME/AMD PSP/POWER SBE) and video processing.
The dumpster fire here is entirely Broadcom's responsibility. Microsoft is only indirectly involved in the VPU firmware by way of acquiring ThreadX many years after the RPi project started. Had Microsoft actually been involved in the project, the RPi would likely meet the ARM SBSA and boot via standard UEFI+ACPI than its Broadcom weirdness.