[libvirt-users] DHCP logging settings

I find that libvirt clogs up syslog with trivial DHCP notifications. I know how to configure alternate logging with dnsmasq directly via 'log-facility' and/or 'quiet-dhcp' options but the XML format used by libvirt appears to have no equivalent options. Is there a way to reduce syslog spam from libvirt without switching to a system-wide dnsmasq service?