I've installed qemu and libvirt on macos big sur with m1 using macports. When i've tried install libvirt with homebrew, it was broken (asked /proc/cpuinfo, lol). Libvirt started as daemon, i've got libvirt-sock on unix-socket directory, but have no virtqemud-sock.
Actions (all with sudo):
port install qemu
port install libvirt
virsh -c qemu:///system
Result:
error: unable to connect to socket «/opt/local/var/run/libvirt/virtqemud-sock»: No such file or directory