Comment 4 for bug 1770254

-- Host with -proposed kernel --

ubuntu@anuchin:~$ virsh nodedev-detach pci_0002_01_00_1
Device pci_0002_01_00_1 detached

ubuntu@anuchin:~$

ubuntu@anuchin:~$ readlink /sys/bus/pci/devices/0002\:01\:00.1/driver
../../../../../../../bus/pci/drivers/vfio-pci
ubuntu@anuchin:~$

-- Bionic Guest --
ubuntu@ubuntu-pcitest:~$ lspci -k
00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge
 Subsystem: Red Hat, Inc QEMU PCIe Host bridge
00:01.0 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
00:01.1 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
00:01.2 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
00:01.3 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
00:01.4 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
00:01.5 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
 Kernel driver in use: pcieport
 Kernel modules: shpchp
01:00.0 Ethernet controller: Red Hat, Inc Virtio network device (rev 01)
 Subsystem: Red Hat, Inc Virtio network device
 Kernel driver in use: virtio-pci
02:00.0 Communication controller: Red Hat, Inc Virtio console (rev 01)
 Subsystem: Red Hat, Inc Virtio console
 Kernel driver in use: virtio-pci
03:00.0 SCSI storage controller: Red Hat, Inc Virtio block device (rev 01)
 Subsystem: Red Hat, Inc Virtio block device
 Kernel driver in use: virtio-pci
04:00.0 SCSI storage controller: Red Hat, Inc Virtio block device (rev 01)
 Subsystem: Red Hat, Inc Virtio block device
 Kernel driver in use: virtio-pci
05:00.0 Ethernet controller: Cavium, Inc. THUNDERX Network Interface Controller virtual function (rev 08)
 Subsystem: Cavium, Inc. THUNDERX Network Interface Controller virtual function
 Kernel modules: nicvf
ubuntu@ubuntu-pcitest:~$