Re: [libvirt] [PATCH v2 2/2] Allow PCI virtio on ARM "virt" machine

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...