[PATCH] Support PCIe Alternative RID Interpretation (ARI)

[Konstantin Belousov]

On Thu, Mar 27, 2014 at 02:48:36PM -0400, Ryan Stone wrote:
> On Tue, Mar 25, 2014 at 5:13 PM, Konstantin Belousov
> <kostikbel at gmail.com> wrote:
> > Well, either the interface I described is provided by pci core, or
> > iommu has to de-facto implement it itself.  IMO it is clearer to have
> > it in pci, but I do not want to block your work on this.
> 
> Yes, but this amounts to some simple masking and shifting on the RID.
> I don't think that's a very high burden.
Well, as I learned during iommu development, a typo there could lay
unnoticed for long time and than beat.  This is due to most modern systems
being PCIe and slot/function often equal to zero, or at least function
equal to zero.

> 
> > I mean, that slot and func should be obtained using pci accessors where
> > needed.  It is definitely not perf-critical, and I dislike having both
> > bsf and rid in the context structure more, then using accessors.
> 
> Ok, I've updated the DMAR patch to use pci accessors instead.  This
> required moving the initialization of ctx_tag.owner earlier in the
> initialization of the DMAR ctx, but beyond that the change was
> trivial.

What is the URL ?
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