Here you can view the list of virtual machines and list of available VFs. To assign a VF to a VM, select the VM name on the left and select the VF to be assigned on the right. You can assign more than one VF at a time. Finally, click "Assign VF" to add the selected VFs to the hosts.
To enable SR-IOV support, IOMMU must be enabled. To do this, select "Enable" for IOMMU and then click "Set IOMMU". Reboot the host machine for changes to take effect.