Half-OT: Secure boot and thirdy party kernel modules

[Petr Pisar]

On 2014-07-07, Florian Weimer <fweimer at redhat.com> wrote:
> Note that Microsoft's current policy may not allow unrestricted 
> virtualization (KVM or Virtualbox—does not matter) because that "permits 
> launch of another operating system instance after execution of 
> unauthenticated code"—the wording is rather unclear.  If Microsoft 
> clarifies that this is forbidden, a future Fedora update will remove 
> this functionality, so you will be forced to disable Secure Boot at this 
> point anyway if you want to continue to use virtualization.
>
Could you elaborate more what "unauthenticated code" is in this case? Is
it a userspace tool for controlling in-kernel virtualization (e.g. qemu
in case of KVM)? Because KVM as a kernel module is signed.

If so, what if user uses pure user-space emulation (e.g. qemu). Either
that imposes user space executables have to be signed too, or the
unclarified statement lacks any meaningful purpose.

-- Petr