AsRock (C246) IOMMU / GVT-g

[poxin]

Hello,

I've been attempting to get GVT-g working on this board with an Intel E2146G. I'm able to get IOMMU groups listed, but not seeing the Intel iGPU anywhere. Proxmox GUI is also not showing mediated devices. I know it should work somehow because I see others using this setup with unraid doing passthrough.

Hoping someone more knowledable than I with this can chime in.

root@pve:~# find /sys/kernel/iommu_groups/ -type l
/sys/kernel/iommu_groups/7/devices/0000:00:1b.0
/sys/kernel/iommu_groups/15/devices/0000:05:00.0
/sys/kernel/iommu_groups/15/devices/0000:04:00.0
/sys/kernel/iommu_groups/5/devices/0000:00:16.4
/sys/kernel/iommu_groups/5/devices/0000:00:16.0
/sys/kernel/iommu_groups/5/devices/0000:00:16.1
/sys/kernel/iommu_groups/13/devices/0000:00:1f.0
/sys/kernel/iommu_groups/13/devices/0000:00:1f.5
/sys/kernel/iommu_groups/13/devices/0000:00:1f.4
/sys/kernel/iommu_groups/3/devices/0000:00:14.2
/sys/kernel/iommu_groups/3/devices/0000:00:14.0
/sys/kernel/iommu_groups/11/devices/0000:00:1d.2
/sys/kernel/iommu_groups/1/devices/0000:00:08.0
/sys/kernel/iommu_groups/8/devices/0000:00:1c.0
/sys/kernel/iommu_groups/16/devices/0000:06:00.0
/sys/kernel/iommu_groups/6/devices/0000:00:17.0
/sys/kernel/iommu_groups/14/devices/0000:03:00.0
/sys/kernel/iommu_groups/4/devices/0000:00:15.1
/sys/kernel/iommu_groups/4/devices/0000:00:15.0
/sys/kernel/iommu_groups/12/devices/0000:00:1e.0
/sys/kernel/iommu_groups/2/devices/0000:00:12.0
/sys/kernel/iommu_groups/10/devices/0000:00:1d.1
/sys/kernel/iommu_groups/0/devices/0000:00:00.0
/sys/kernel/iommu_groups/9/devices/0000:00:1d.0

root@pve:~# cat /etc/kernel/cmdline
root=ZFS=rpool/ROOT/pve-1 boot=zfs intel_iommu=on iommu=pt i915.enable_gvt=1

root@pve:~# cat /etc/modules
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
vfio-mdev
kvmgt
i915

root@pve:~# lspci -nnk | grep "VGA\|Audio"
05:00.0 VGA compatible controller [0300]: ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000] (rev 41)

 

[poxin]

Finally got it..

root@pve:~# ls /sys/bus/pci/devices/0000\:00\:02.0/mdev_supported_types/
i915-GVTg_V5_4  i915-GVTg_V5_8

I also installed i965-va-driver via apt but not sure if that did anything.

 

[BobMccapherey]

I have my E2276G working - I had to increase the aperture size in the BIOS to have more options for supported types.