On 10/29/24 09:18, Kasireddy, Vivek wrote: >>>> BTW, is any DG2 GPU suitable for testing of this patchset? Will I be >>>> able to test it using a regular consumer A750 card? >>> Yes, you can test with any DG2 dGPU as long as you can passthrough it to >> the >>> Guest VM. And, if there is an iGPU available on the Host, you can use >> GTK/SDL UI >>> for local display or Spice UI for remote display if there is no iGPU on the >> Host. >>> This is exactly how I started testing this patch series but I am now >> predominantly >>> testing this series with SRIOV enabled iGPUs and dGPUs. >> Was hoping to try out SR-IOV on A750 if it's even possible at all. > AFAIK, SRIOV is not supported on any versions of DG2 including A750. I'm having trouble with getting it to work. My testing setup: 1. Passthroughed A750 that uses XE driver 2. RaptorLake iGPU on host used for virtio-gpu, uses i915 driver 3. QEMU latest master branch + your QEMU vfio_dmabuf_2 patches applied on top 4. Latest linux-next kernel on host 5. Latest linux-next kernel on guest + this v2 applied In guest I'm running this: seatd-launch -- weston --drm-device=card1 --additional-devices=card0 where card1 is A750 and card0 is virtio-gpu. I added printk's and see that virtio-gpu imports A750 dma-buf and gets XE's SGT, but nothing shows on the QEMU display. I tried both GTK and SPICE displays. If I connect HDMI display to passthroughed A750 while running weston command above, then I get weston working on the A750 HDMI display and still nothing is shown on virtio-gpu display. I also had to force virtio-gpu driver to always probe before XE, otherwise virtio-gpu gets PCI read errors and fails to probe because it fails to detect virtio features. Am I doing anything wrong? Suggestions are welcome. -- Best regards, Dmitry
