Details from working guest 18.04
$ lsmod
Module Size Used by
isofs 45056 0
nls_iso8859_1 16384 1
kvm_intel 217088 0
kvm 614400 1 kvm_intel
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul
Hi Christian
As you pointed out this does appear to be an issue with the reduced
kernel kvm image. I ran the same setup using a standard image and the
interface showed up. However after running your suggested updates from
comment A on the kvm kernal image, the interface still did not show up.
If
Public bug reported:
After setting up pci pass through for a virtual function it did not show up as
an interface in Ubuntu 20.04, it did however show up as a PCI device.
After reverting back to 18.04 with exactly the same configuration the interface
showed up as expected.
Bellow is the configu