On Tue, Jul 5, 2022 at 10:02 AM Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx> wrote: > > On 7/5/22 18:45, Gerd Hoffmann wrote: > > Hi, > > > >>> Also note that pci is not the only virtio transport we have. > >> > >> The VirtIO indeed has other transports, but only PCI is really supported > >> in case of the VirtIO-GPU in kernel and in Qemu/crosvm, AFAICT. Hence > >> only the PCI transport was tested. > > > > qemu -M microvm \ > > -global virtio-mmio.force-legacy=false \ > > -device virtio-gpu-device > > > > Gives you a functional virtio-gpu device on virtio-mmio. > > > > aarch64 virt machines support both pci and mmio too. > > s390x has virtio-gpu-ccw ... > > Gerd, thank you very much! It's was indeed unclear to me how to test the > MMIO GPU, but yours variant with microvm works! I was looking for trying > aarch64 in the past, but it also was unclear how to do it since there is > no DT support for the VirtIO-GPU, AFAICS. just a drive-by note, IME on aarch64 kernels, at least with crosvm, virtgpu is also a pci device.. the non-pci things in the guest kernel use dt, but devices on discoverable busses like pci don't need dt nodes (which is true also in the non-vm case) BR, -R > I booted kernel with this patchset applied and everything is okay, Xorg > works. > > [drm] Initialized virtio_gpu 0.1.0 0 for LNRO0005:01 on minor 0 > virtio-mmio LNRO0005:01: [drm] drm_plane_enable_fb_damage_clips() not > called > virtio-mmio LNRO0005:01: [drm] fb0: virtio_gpudrmfb frame buffer device > > There is no virgl support because it's a virtio-gpu-device and not > virtio-gpu-device-gl that is PCI-only in Qemu. Hence everything seems good. > > I'd appreciate if you could give s390x a test.. I never touched s390x > and it will probably take some extra effort to get into it. > > -- > Best regards, > Dmitry
