On 9/14/07, Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > On 9/14/07, Markus Rechberger <mrechberger@xxxxxxxxx> wrote: > > On 9/14/07, Manu Abraham <abraham.manu@xxxxxxxxx> wrote: > > > Joerg Roedel wrote: > > > > On Fri, Sep 14, 2007 at 11:57:59AM +0400, Manu Abraham wrote: > > > >>>>> What do you think about IOMMU? > > > >>>>> > > > >>>>> > > > >>>> Just because AMD or INTEL want to invent some whizzy new technology > it > > > >>>> doesn't say anything about the TV card development and retail > business. > > > >>>> Intel and AMD have teams of Linux engineers helping operating > system > > > >>>> developers bring their ideas and technologies to new platforms. > That's > > > a > > > >>>> million miles away from any of the TV board vendors I know of, who > have > > > >>>> little or NO fulltime linux developers and consider the < 5% market > > > >>>> fringe at best. > > > >>>> > > > >>> it helps to virtualize devices and introduces newer features for > that. > > > >>> Some interesting projects could be derrived out of that, there are > > > >>> quite a few interesting papers floating around how drivers could be > > > >>> handled in future. > > > >>> > > > >> IOMMU can be considered similar to the AGP GART, which is similar, > > > >> remapping the Addresses, as far as i understand. > > > > > > > > Common new IOMMUs have only very few in common with the AGP GART. In > > > > fact, with current modern IOMMU hardware it will be possible to > > > > implement secure userspace device drivers that are even able to do > DMA. > > > > This is not possible with the GART. > > > > > > > >> Though you get a physical to virtual translation, what about > interrupts, > > > > > > > > Modern IOMMUs are able to remap interrupts. This will solve the > problem > > > > with PCI interrupt sharing. > > > > > > What CPU's are we talking about ? > > > > > > > upcoming x86-64 processors from the AMD side. I'm not into what Intel > > is doing in that area at the moment. > > All AMD64 chips have an IOMMU. Only Intel's most recent chips do. > It's not available yet, you can read more about it in the following article: http://developer.amd.com/articlex.jsp?id=101 If you're interested in it I can put together some more information about it. Markus _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
