bug#22633: Provide a kvm-less qemu / guix system vm

[Ludovic Courtès]

Jookia <address@hidden> skribis:

> We should probably also blacklist kvm on Libreboot machines too somehow,

A simple way to achieve this is with:

  (operating-system
    ;; …
    (kernel-arguments '("modprobe.blacklist=kvm-intel,kvm")))

But I guess ‘guix system vm’ will now fail.

We could change the two occurrences of ‘-enable-kvm’ to use this flag if
and only if /dev/kvm exists (I think it doesn’t exist when the kvm
modules are not loaded.)

Thoughts?

Ludo’.