On Nov 19, 2015 5:45 AM, "Michael S. Tsirkin" <m...@redhat.com> wrote: > > On Tue, Oct 27, 2015 at 11:38:57PM -0700, Andy Lutomirski wrote: > > This switches virtio to use the DMA API unconditionally. I'm sure > > it breaks things, but it seems to work on x86 using virtio-pci, with > > and without Xen, and using both the modern 1.0 variant and the > > legacy variant. > > So thinking hard about it, I don't see any real drawbacks to making this > conditional on a new feature bit, that Xen can then set..
Can you elaborate? If I run QEMU, hosting Xen, hosting Linux, and the virtio device is provided by QEMU, then how does Xen set the bit? Similarly, how would Xen set the bit for a real physical device? --Andy -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html