Yep, the "hack" (X86EmulatorPkg) allows running the card in the UEFI out of the box. AMD also provides native aarch64 builds of their UEFI GOP driver though. An

Yep, the "hack" (X86EmulatorPkg) allows running the card in the UEFI out of the box. AMD also provides native aarch64 builds of their UEFI GOP driver though. And none of this is necessary for running the GPU in the OS – amdgpu POSTs the GPU just fine. > memory-cacheability-attibutes issues Recently I've added aarch64 support to FreeBSD's port of the DRM/KMS drivers :) Took a couple hours to realize that our implementations of Linux's mapping functions used normal uncacheable memory instead of device memory – fixing that stopped the hangs on driver load and allowed everything to work. Then there was some corruption on the screen – our drm-kms is from Linux 5.0 for now, and I've had to cherry-pick a fix that only landed in 5.1 I think: https://patchwork.kernel.org/patch/10778815/ https://patchwork.kernel.org/patch/10778815/