Comment # 7 on bug 1202541 from Bernhard Wiedemann

journalctl --unit libvirtd
is rather boring

-- Logs begin at Thu 2022-08-18 09:21:33 UTC, end at Fri 2022-08-19 14:12:02
UTC. --
Aug 18 09:24:24 atreju6-suse systemd[1]: Starting Virtualization daemon...
Aug 18 09:24:24 atreju6-suse systemd[1]: Started Virtualization daemon.
Aug 18 09:26:00 atreju6-suse libvirtd[29544]: libvirt version: 5.1.0
Aug 18 09:26:00 atreju6-suse libvirtd[29544]: hostname: atreju6-suse

Aug 18 09:38:40 atreju6-suse libvirtd[29544]: Domain id=27 name='pontifex2'
uuid=6afc4ca3-0351-4dc3-9757-070f539de32b is tainted: host-cpu
Aug 18 09:57:39 atreju6-suse libvirtd[29544]: Domain id=28 name='progress'
uuid=822517bf-33d3-4871-9d7d-ac7f2d0ccf1f is tainted: host-cpu
Aug 18 09:58:04 atreju6-suse libvirtd[29544]: Domain id=29 name='pagure01'
uuid=9d1290ab-db8e-45c7-ab06-418ca07bd584 is tainted: host-cpu

and one such taint entry for most of the VMs on the host.