[PATCH] drm/amdgpu/gmc: use PCI BARs for APUs in passthrough

[Michel Dänzer]

On 2022-03-10 19:06, Alex Deucher wrote:
> If the GPU is passed through to a guest VM, use the PCI
> BAR for CPU FB access rather than the physical address of
> carve out.  The physical address is not valid in a guest.

I think amdgpu_device_flush_hdp & amdgpu_device_invalidate_hdp need to be modified accordingly.


Also, I wonder if BAR resizing could work with APUs?


-- 
Earthling Michel Dänzer            |                  https://redhat.com
Libre software enthusiast          |         Mesa and Xwayland developer