VFIO support for VIRTIO NET PCI devices
modulename: virtio-vfio-pci.ko
configname: CONFIG_VIRTIO_VFIO_PCI
Linux Kernel Configuration
└─>Device Drivers
└─>VFIO Non-Privileged userspace driver framework
└─>PCI support
└─>VFIO support for PCI devices
└─>VFIO support for VIRTIO NET PCI devices
In linux kernel since version 4.19.310 (release Date: 2024-03-15)
This provides support for exposing VIRTIO NET VF devices which support
legacy IO access, using the VFIO framework that can work with a legacy
virtio driver in the guest.
Based on PCIe spec, VFs do not support I/O Space.
As of that this driver emulates I/O BAR in software to let a VF be
seen as a transitional device by its users and let it work with
a legacy driver.
If you don't know what to do here, say N.
legacy IO access, using the VFIO framework that can work with a legacy
virtio driver in the guest.
Based on PCIe spec, VFs do not support I/O Space.
As of that this driver emulates I/O BAR in software to let a VF be
seen as a transitional device by its users and let it work with
a legacy driver.
If you don't know what to do here, say N.