https://bugs.freedesktop.org/show_bug.cgi?id=80419
--- Comment #140 from Jan Vesely jan.vesely@rutgers.edu --- (In reply to Nicolai Hähnle from comment #139)
Are you running with some kind of virtualization enabled? I'm not familiar with these AMD-Vi messages.
Those are printed by the IOMMU driver (device accessed unmapped page). Not necessarily virtualization related.