Messages in this thread | | | Date | Wed, 28 Jul 2010 15:52:50 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 9/9] x86: Detect whether we should use Xen SWIOTLB. |
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On 07/28/2010 03:38 PM, Konrad Rzeszutek Wilk wrote: > > Long term I think the driverization is the way to go, and.. > > I think the flow a). check if we need SWIOTLB b), check all IOMMUs, c). > recheck SWIOTLB in case no IOMMUs volunteered MUST be preserved > irregardless if we driverize the IOMMUs/SWIOTLB or not. > > Perhaps we should get together at one of these Linux conferences and > think this one through? Beers on me. >
I don't understand point (a) here. (c) simply seems like the fallback case, and in the case we are actively forcing swiotlb we simply skip step (b).
-hpa
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