On 9/14/07, Markus Rechberger <[EMAIL PROTECTED]> wrote: > On 9/14/07, Manu Abraham <[EMAIL PROTECTED]> 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. Alex - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
