P9 directory does not being mounted in host

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.