On Mon, Nov 9, 2015 at 9:26 PM, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 2015-11-09 at 18:18 -0800, Andy Lutomirski wrote: >> >> Which leaves the special case of Xen, where even preexisting devices >> don't bypass the IOMMU. Can we keep this specific to powerpc and >> sparc? On x86, this problem is basically nonexistent, since the IOMMU >> is properly self-describing. >> >> IOW, I think that on x86 we should assume that all virtio devices >> honor the IOMMU. > > You don't like performances ? :-) This should have basically no effect. Every non-experimental x86 virtio setup in existence either doesn't work at all (Xen) or has DMA ops that are no-ops. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
