to-be done
<domain type="kvm">
[...]
<memoryBacking>
<source type="memfb"/>
<access mode="shared/>"
</memoryBacking>
[...]
</domain>
<domain type="kvm">
[...]
<devices>
[...]
<filesystem type="mount" accessmode="passthrough">
<driver type="virtiofs"/>
<source dir="/mnt/"> # Host directory to be shared with the guest
<target dir="/mnt"/> # Directory on the guest
</filesystem>
[...]
</devices>
[...]
</domain>