[LinuxBIOS] SMM in LinuxBIOS

Arvind Seshadri arvinds+ at cs.cmu.edu
Fri Jan 12 17:57:51 CET 2007

Hi Carl-Daniel,
Yep, the GART is one way to go. On the other hand, there are PCI-Express
systems that do not have a GART. The whole thing is a bit of a mess, which
is why I didn't expand on it.


On Fri, 12 Jan 2007, Carl-Daniel Hailfinger wrote:

> Hi Arvind,
> Arvind Seshadri wrote:
> > Having an IOMMU is not necessary since our goal is only to prevent DMA
> > write to a region of memory. We have come up with techniques that can
> > prevent DMA writes on legacy systems without an IOMMU. Also, Pioneer is
> That sounds interesting. Are you using the GART present in most current
> systems?
> > not LinuxBIOS-specific. It can be incorporated into any SMM code.
> Thanks for clarifying that.
> Regards,
> Carl-Daniel
> --
> http://www.hailfinger.org/

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