On 2022-03-11 11:32, Christian König wrote: > Am 11.03.22 um 11:24 schrieb 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. I'm surprised you gave your R-b despite this. Surely the HDP cache needs to be handled when going through the BAR? >> Also, I wonder if BAR resizing could work with APUs? > > At least trivial to implement. > > The host had to resize the BAR for the client or otherwise the client could easily bring down the system. Gotcha, makes sense. -- Earthling Michel Dänzer | https://redhat.com Libre software enthusiast | Mesa and Xwayland developer
