/usr/lib/linux-tools/4.4.0-1010-kvm/x86_energy_perf_policy is in linux-tools-4.4.0-1010-kvm 4.4.0-1010.15.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/4.4.0-1010-kvm/../../linux-kvm-tools-4.4.0-1010/x86_energy_perf_policy