Not able to passthrough driver to qemu VM Ubuntu 20 and Ubuntu 22 #75
Description
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 run stat -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