1# SPDX-License-Identifier: GPL-2.0-only 2config VIRTIO_VFIO_PCI 3 tristate "VFIO support for VIRTIO NET PCI devices" 4 depends on VIRTIO_PCI && VIRTIO_PCI_ADMIN_LEGACY 5 select VFIO_PCI_CORE 6 help 7 This provides support for exposing VIRTIO NET VF devices which support 8 legacy IO access, using the VFIO framework that can work with a legacy 9 virtio driver in the guest. 10 Based on PCIe spec, VFs do not support I/O Space. 11 As of that this driver emulates I/O BAR in software to let a VF be 12 seen as a transitional device by its users and let it work with 13 a legacy driver. 14 15 If you don't know what to do here, say N. 16