SR-IOV VFs passed through to a KVM libvirt guest do not have NUMA locality

Issue

• SR-IOV VFs passed through to a KVM libvirt guest do not have NUMA locality
• Not able to get Numa affinity of PCI device on guest
• We are trying to know the NUMA affinity of PCI devices (network interface in our case) on guest hosted on RHEL 7.3. We are seeing only -1.

# lspci | grep Ether
00:09.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
00:0a.0 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)

# cat /sys/devices/pci0000:00/0000:00:09.0/numa_node
-1
# cat /sys/devices/pci0000:00/0000:00:0a.0/numa_node
-1