I have a Minimal kvm/xen OpenSUSE virtual appliance in a Virt Manager virtual machine and have a p9 shared folder with this setup:
<filesystem type="mount" accessmode="mapped">
<source dir="/mnt"/>
<target dir="/mnt"/>
<alias name="fs2"/>
<address type="pci" domain="0x0000" bus="0x09" slot="0x00" function="0x0"/>
</filesystem>
But the guest is not mounting it.