On 5/21/24 17:57, Alex Bennée wrote: > Alex Bennée <alex.ben...@linaro.org> writes: > >> Dmitry Osipenko <dmitry.osipe...@collabora.com> writes: >> >>> Hello, >>> >>> This series enables Vulkan Venus context support on virtio-gpu. >>> >>> All virglrender and almost all Linux kernel prerequisite changes >>> needed by Venus are already in upstream. For kernel there is a pending >>> KVM patchset that fixes mapping of compound pages needed for DRM drivers >>> using TTM [1], othewrwise hostmem blob mapping will fail with a KVM error >>> from Qemu. >>> >>> [1] >>> https://lore.kernel.org/kvm/20240229025759.1187910-1-steve...@google.com/ >>> >>> You'll need to use recent Mesa version containing patch that removes >>> dependency on cross-device feature from Venus that isn't supported by >>> Qemu [2]. >>> >>> [2] >>> https://gitlab.freedesktop.org/mesa/mesa/-/commit/087e9a96d13155e26987befae78b6ccbb7ae242b >>> >>> Example Qemu cmdline that enables Venus: >>> >>> qemu-system-x86_64 -device virtio-vga-gl,hostmem=4G,blob=true,venus=true \ >>> -machine q35,accel=kvm,memory-backend=mem1 \ >>> -object memory-backend-memfd,id=mem1,size=8G -m 8G >> >> What is the correct device for non-x86 guests? We have virtio-gpu-gl-pci >> but when doing that I get: >> >> -device virtio-gpu-gl-pci,hostmem=4G,blob=true,venus=true >> qemu-system-aarch64: -device >> virtio-gpu-gl-pci,hostmem=4G,blob=true,venus=true: opengl is not available >> >> According to 37f86af087 (virtio-gpu: move virgl realize + properties): >> >> Drop the virgl property, the virtio-gpu-gl-device has virgl enabled no >> matter what. Just use virtio-gpu-device instead if you don't want >> enable virgl and opengl. This simplifies the logic and reduces the test >> matrix. >> >> but that's not a good solution because that needs virtio-mmio and there >> are reasons to have a PCI device (for one thing no ambiguity about >> discovery). > > Oops my mistake forgetting: > > --display gtk,gl=on > > Although I do see a lot of eglMakeContext failures.
Please post the full Qemu cmdline you're using -- Best regards, Dmitry
