I've enabled SR-IOV on a network adapter via modprobe:   /boot/config/modprobe.d/mlx4_core.conf options mlx4_core num_vfs=4   This creates four Virtual Function devices that can be assigned to multiple virtual machines for direct hardware access (without requiring a dedicated NIC)   This also makes them available to vfio-pci passthrough function:   However this fails   Loading config from /boot/config/vfio-pci.cfg BIND=0000:03:00.1|15b3:10