Passing a Device Through to a VM

This section explains how to pass a created VF device through to a VM using VFIO, enabling low-latency and high-performance hardware access.

1. Query the domain and BDF number of the passthrough device.

   lspci -tv

   

   

   In this example, the domain is 0000 and the BDF number is 17:00.0.

2. Add the passthrough device information to the XML file, copy the content of hostdev to dev, and enter the domain and BDF number in source.

   <devices>
   <hostdev mode='subsystem' type='pci' managed='yes'>
   <driver name='vfio'/>
   <source>
   <address domain='0x0000' bus='0x17' slot='0x00' function='0x0'/>
   </source>
   </hostdev>
   </devices>

3. On the VM, query the passthrough device information.

   lspci -tv