On Thu, Nov 14, 2013 at 2:41 PM, Alexander Graf <ag...@suse.de> wrote: > > > Am 14.11.2013 um 17:32 schrieb Benjamin Herrenschmidt > <b...@kernel.crashing.org>: > >> On Thu, 2013-11-14 at 17:23 -0500, Alexander Graf wrote: >>> Yes. But I think it's the correct thing to do in this case. X86 also >>> doesn't create a USB controller like we would have to. Our pseries >>> platform just doesn't have a legacy PC/AT keyboard controller. >> >> Sure, but that implies that -nodefaults -device VGA creates a working >> usable machine on x86 and not on pseries... > > There is a set of devices that is always part of your machine. For the PC, > this is the PCI complex and SuperIO (including the keyboard controller). > > For pseries, we don't have that chip. We could simulate similar behavior > through a usb controller and keyboard. But those are devices that not every > pseries VM will want to have. > > So it really is libvirt's or the xml's job to add these. > > Even on x86 there are Atom chips out now that run without SuperIO, so we > might eventually have an x86 machine type without keyboard too, who knows.
As long as it's x86, there will always be a keyboard controller if you ever want to support more than 1MB of RAM properly since the keyboard controller is used to enable the a20 bit. Regards, Anthony Liguori > > Alex >
