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libvirt
=======
You can configure `vfio-user` devices in a `libvirt` domain configuration:
1. Add `xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'` to the `domain`
element.
2. Enable sharing of the guest's RAM:
```xml
<memoryBacking>
<source type='file'/>
<access mode='shared'/>
</memoryBacking>
```
3. Pass the vfio-user device:
```xml
<qemu:commandline>
<qemu:arg value='-device'/>
<qemu:arg value='{"driver":"vfio-user-pci","socket":{"path": "/tmp/vfio-user.sock", "type": "unix"}'/>
</qemu:commandline>
```
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