On Tue, 19 Jul 2016 21:42:58 +0300 Marcel Apfelbaum <[email protected]> wrote:
> Modern machines are expected to be used by newer setups with > modern guests aiming the use of the latest features. > > Enable modern and disable legacy for virtio devices > plugged into PCIe ports (Root ports or Downstream ports). > Using the Virtio 1 mode will remove the limitation > of the number of devices that can be attached to a machine > by removing the need for the IO BAR. Stupid question: Does this limitation show up for legacy and transitional, but not for modern? Would it make sense then to default to modern for PCIe and transitional for non-PCIe? (The term "virtio-1" mode always confuses me a bit; this may be because ccw unlike pci does not have modern-only devices - and even if we had, basically the only difference would be that we'd disallow devices without the VERSION_1 feature.)
