Comment 17 for bug 1706630

> The most common related mistake is the lac of <gic version='3'/>

This is what I found too, but it's seems like in my case something else cause this error. Below is attempt to run https://paste.ubuntu.com/25423471/ from Comment 9 which definitely have <gic version='3'/> :

~$ virsh start instance-00000007
error: Failed to start domain instance-00000007
error: internal error: process exited while connecting to monitor: 2019-06-11T18:49:31.843203Z qemu-system-aarch64: -device ioh3420,port=0x8,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x1: MSI is not supported by interrupt controller

Detailed log in bug 1832394.

> If you happen to discuss more for the virt-manager@arm case I'd ask to open a new bug (refer to this one, but keep the discussions separate)

Done:
https://bugs.launchpad.net/ubuntu/+source/virt-manager/+bug/1832394
https://bugs.launchpad.net/ubuntu/+source/virt-manager/+bug/1832395