On Mi, 2015-07-01 at 19:32 -0400, Cole Robinson wrote: > On 06/30/2015 02:47 AM, Pavel Fedin wrote: > > Hello! > > > >> Unfortunately thinking about this some more, the current patch approach might > >> not be acceptable as is, since current distros as a guest don't support -M > >> virt with PCI... for example Fedora 21 or 22. > > > > How can this be? > > If qemu version is new enough, virt machine should have a PCI controller. You do not have to supply > > any extra options, it's just there. It's in mainstream. Or do your distros artificially raise > > version number? > > Or are you talking about distros themselves? But... Again, how? Do you have "Generic PCI > > controller" and virtio-PCI drivers disabled in .config of your kernel? Why? Shouldn't this be fixed > > then? > > virtio-PCI has much better performance than virtio-mmio, because you can use vhost-net with irqfds > > on it. > > I'm talking about the distro kernel as a guest. My understanding is that > Fedora 21/22 AArch64 does _not_ work with virtio-pci, but it does work with > virtio-mmio. But I've yet to confirm yet... arm64 has no generic pci host support yet (as of upstream kernel 4.1). arm has it for a while (and at least f22 works just fine with it). cheers, Gerd -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list