On Sat, 2014-09-20 at 22:48 -0700, Andy Lutomirski wrote: > > I'm all for doing this as some kind of bus property, if needed, > although David Woodhouse may be right that the best solution is to > *always* have the IOMMU there and to just ask it for an identity map > if desired.
That's the right solution for x86, certainly. For POWER it's a little less clear-cut because I don't think the IOMMU normally supports identity mapping there. You could still do an identity mapping (hell, we do at the moment) but it'd be a very special case. -- dwmw2
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