Not able to passthrough driver to qemu VM Ubuntu 20 and Ubuntu 22

Hi,

I have installed the card on a KVM and made sure that all needed setup for the card to be pass through to a VM was set as it should. Added in grub: GRUB_CMDLINE_LINUX_DEFAULT="iommu=1 intel_iommu=on iommu=pt systemd.unified_cgroup_hierarchy=0 kvm.ignore_msrs=1 vfio-pci.ids=8086:56a1" also added the following settings: cat /lib/modules/$(uname -r)/modules.builtin | grep vfio returns:

kernel/drivers/vfio/vfio.ko
kernel/drivers/vfio/vfio_virqfd.ko
kernel/drivers/vfio/vfio_iommu_type1.ko
kernel/drivers/vfio/pci/vfio-pci-core.ko
kernel/drivers/vfio/pci/vfio-pci.ko

inside: /etc/modprobe.d/vfio.conf I have

blacklist nouveau
blacklist snd_hda_intel
options vfio-pci ids=8086:56a1

Just added the last line to what I already had. inside : /etc/modules-load.d/vfio.conf I have vfio-pci

Card is being passthrough to the VM and I am able to see it using lspci -v |grep -A8 VGA from within the VM I get

09:00.0 VGA compatible controller: Intel Corporation Device 56a1 (rev 08) (prog-if 00 [VGA controller])
        Subsystem: Intel Corporation Device 1021
        Physical Slot: 0-5
        Flags: bus master, fast devsel, latency 0, IRQ 38
        Memory at f8000000 (64-bit, non-prefetchable) [size=16M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Expansion ROM at f9000000 [disabled] [size=2M]
        Capabilities: [40] Vendor Specific Information: Len=0c <?>
        Capabilities: [70] Express Endpoint, MSI 00

Installed all packages as in the installation guide provided for BOTH Ubuntu 20.04 and Ubuntu 22.04 and I am not able to get the igpu passthrough correctly. when I runstat -c "%G" /dev/dri/render* I get stat: cannot stat '/dev/dri/render*': No such file or directory as far as I have learned that indicates that the card is not setup correctly.

The xml settings, of the vm used, is setup for the regular machine I am using with the following:

at this point reffering to Ubuntu 20.04 <type arch='x86_64' machine='pc-q35-focal-hpb'>hvm</type> using the pc-q35-focal-hpb and <cpu mode='host-passthrough' check='none' migratable='on'/>

After installing the dkms I do get LMEM bar size issue that I also need to get addressed as well. Just to make it clear - I did all the installation ONLY insdie the VM and the card had no installation for the driver inside the KVM hypervisor - I thought that since I passthrough the card there is no need for it get the driver and tools installed inside the KVM itself.

If there is something I a missing that can make the gpu passthrough as it should with the ability to get rendering on the VM as expected I would be happy to get assistance on it and that I will be able to get the card working inside the VM and get OpenCL as well.

This is a major show stopper and I really appreciate you assistance on getting this issue resolved and make the card work as expected inside a VM.

Thanks Arye

intel-gpu / documentation

Not able to passthrough driver to qemu VM Ubuntu 20 and Ubuntu 22 #75