Has anyone tried using KVM with the Juno board? It doesn't look like the bootloader starts the cores in hypervisor mode, so it's not clear to me whether the current system software will support a hypervisor at the moment, even with the appropriate kernel options selected. Are there any plans to support it?
It is not initializing because you are probably using an ancient kernel (pre 3.16), which doesn't recognize A53 as a valid CPU for virtualization. Please use a recent enough kernel.
As Sudeep mentioned above, you will also need an updated userspace (or use the taskset workaround).
Thanks,
M.