[libvirt-users] Resource control is not supported on this host

Libvirt release version V4.1.0 It add a element is cachetune After we add this, We can use host-cpu-cache But when i add it, my host get a error message: "Resource control is not supported on this host" Why? Following is my environment: kernel : 4.1.5, libvirt : 4.1.0 qemu : 2.9 host : lfs-7.0 my add cachetune in xml: <cachetune vcpus='0-3'> <cache id='1' level='3' type='data' size='3' unit='MiB'/> </cachetune>