Actually qemu-kvm.rules can stay at 40 by using :=, so the rules file becomes
KERNEL=="kvm", GROUP:="kvm", MODE:="0660", TAG:="", RUN:="/usr/bin/setfacl -m g::rw /dev/kvm"
Actually qemu-kvm.rules can stay at 40 by using :=, so the rules file becomes
KERNEL=="kvm", GROUP:="kvm", MODE:="0660", TAG:="", RUN:="/ usr/bin/ setfacl -m g::rw /dev/kvm"