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. Markus _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
