On Thu, 2013-08-15 at 12:10 +0100, Stefano Stabellini wrote: > At the moment always rely on swiotlb-xen, but when Xen starts supporting > hardware IOMMUs we'll be able to avoid it conditionally on the presence > of an IOMMU on the platform.
Do we have any idea how we are going to do this? It's extra complicated if you consider that on some systems on some of the devices are behind an IOMMU :-/ I wonder if we can enumerate which devices have an IOMMU at boot time and force a ludicrous dma mask (such as 0) if one isn't present in order to force us to always take the exchange_and_pin path? Ian. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
