On Tue, Nov 22, 2011 at 18:15, Matthew Garrett <mjg at redhat.com> wrote: > On Fri, Nov 18, 2011 at 10:41:29PM -0800, Keith Packard wrote: > > > + /* > > + * Only enable RC6 if all dma remapping is disabled, or if > > + * there's no iommu present in the machine. > > + */ > > + if (INTEL_INFO(dev)->gen == 6) > > + return no_iommu || dmar_disabled; > > So the user has to choose between 5W of power saving or having dmar? And > we default to giving them dmar?
