[libvirt-users] How to assign to PCI slot 0

Hi, I'm new to this group so bear with me. So I need to passthrough a pci device on a particular bus and slot to get Linux to recognize it correctly. I need pci bus 6, slot 0. However whenever I try to use this slot inside of virsh edit it complains: error: XML error: Invalid PCI address 0000:06:00.0. slot must be >= 1 Failed. Try again? [y,n,i,f,?]: Is there a way to work around this ? Like can I disable the strict XML checking or even run the qemu commands manually? Thanks, Andy