oci-kvm-hook is a OCI hook program. If you add it to the runc json data as a hook, runc will execute the application after the container process is created but before it is executed, with a
prestart flag. When the container starts
oci-kvm-hook will make sure that
/dev/kvm is available inside the container.
$ docker run -it busybox /bin/sh $ ls -l /dev/kvm