Christian I work with Neil, the setup is in a qemu VM. so the host OS is Ubuntu 18.04 in both cases, its just within the Guest VM that the os changes from 18.04 to 20.04 with the exact same parameters. it is automated, so the setup is exact comparison with the only difference being the OS version.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1892422 Title: Pci passthrough interface not showing up in Ubuntu 20.04 but does show in 18.04 Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Incomplete Bug description: 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 configuration and output for both 18.04 and 20.04. virt-install --import --connect qemu:///system --name emsk8sm1 --ram 8192 --disk pool/emsk8sm1/emsk8sm1.img,format=img,bus=virtio --disk cidata.img,device=cdrom,format=img --vcpus 4 --cpu host --os-type linux --os-variant ubuntu18.04 --network bridge=br0,model=virtio,virtualport_type=openvswitch,mac=52:54:00:8a:9c:ea --hostdev 3b:02.5 --console pty,target_type=serial --graphics type=vnc,listen=0.0.0.0 --noautoconsole --autostart -v Configuration of 18.04 where the passthrough works Version Linux emsk8sm1 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux virsh dumpxml emsk8sm1 <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x3b' slot='0x02' function='0x5'/> </source> <alias name='hostdev0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </hostdev> lspci | grep Ethernet 00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device 00:06.0 Ethernet controller: Intel Corporation Ethernet Virtual Function 700 Series (rev 02) <--- Pass through interface ip link show [interface shows inside of vm ens6] 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether 52:54:00:8a:9c:ea brd ff:ff:ff:ff:ff:ff 3: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether ea:99:ea:36:3e:63 brd ff:ff:ff:ff:ff:ff Configuration of 20.04 where the VF shows as a PCI device but does not show as an interface Version Linux emsk8sm1 5.4.0-1020-kvm #20-Ubuntu SMP Fri Jul 10 05:03:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux virsh dumpxml emsk8sm1 <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x3b' slot='0x02' function='0x5'/> </source> <alias name='hostdev0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </hostdev> lspci | grep Ethernet 00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device 00:06.0 Ethernet controller: Intel Corporation Ethernet Virtual Function 700 Series (rev 02) <--- Pass through interface ip link show [ens 6 does not show as an interface} 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 52:54:00:8a:9c:ea brd ff:ff:ff:ff:ff:ff 3: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ipip 0.0.0.0 brd 0.0.0.0 4: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/sit 0.0.0.0 brd 0.0.0.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1892422/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
