$ virsh start foobar
error: Failed to start domain foobar
error: internal error: process exited while connecting to monitor: /usr/bin/qemu-kvm: 2: /usr/bin/qemu-kvm: head: Permission denied
/usr/bin/qemu-kvm: 2: /usr/bin/qemu-kvm: awk: Permission denied
/usr/bin/qemu-kvm: 7: /usr/bin/qemu-kvm: uname: Permission denied
qemu-system-ppc: -machine pseries,accel=kvm,usb=off: Unsupported machine type
Use -machine help to list supported machines!