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SubjectRe: Notes from LPC PCI/MSI BoF session
On Mon, Sep 22, 2008 at 12:29:18PM -0700, Jesse Barnes wrote:
> PCI address space management
> ----------------------------
> TJ has a bunch of code to improve address space management in Linux. We
> talked for a few minutes about this at the BoF; at this point I'm just
> waiting for TJ to post his stuff so we can start integrating it. Hopefully
> we can start merging small pieces of it (like the multiple PCI gap stuff) for
> 2.6.28, and get some more eyes on the more aggressive PCI-DMAR stuff he's
> been talking about soon.
> Well that's all I have in the way of notes. Feel free to add your own if I
> missed anything or correct me if I mischaracterized things.

One thing that wasn't resolved at the meeting was the question of 64-bit
addressing and PCI-PCI bridges (primarily because nobody had their
PCI-SIG login with them). I've now downloaded the latest PCI-PCI Bridge
spec and there are still no facilities to forward addresses >4GB (other
than the prefetchable region that was already in PPB 1.1).

Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."

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