I’ve been working with GPUs lately - given the lack of a BIOS on the unmatched - is GPU support, specifically resizable bar (rebar), relying on a combination of device tree, gpu firmware, and vendor driver support? Meaning the gpu driver enables rebar support on kernel initialization if the driver detects the BIOS (which doesnt exist) has not already enabled rebar?
I have run across this project - ReBarUEFI - and was wondering if anyone has successfully used it.
If bios/uefi rebar isn’t a hard requirement, then it seems firmware updates, device tree, kernel, and driver updates are the limiting factors on rebar support?