Currently only the Hyper-V driver supports this, so that's the only
thing that will report True. Future changes will extend this
functionality to libvirt.
Blueprint: allow-secure-boot-for-qemu-kvm-guests
Change-Id: I314f50a253317b6d80e1fcdd1b5932534841c57f
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>