On 07/30/2014 03:51 AM, Jean-Baptiste Rouault wrote: > Hi, > > I'm trying to run vexpress-a9 virtual machines (armv7l architecture) using > libvirt. > > The vexpress-a9 doesn't support vga cards, but libvirt adds a video "cirrus" > video card when there is a "graphics" element in the domain xml. This prevents > the domain from booting. > > At the moment, the only workaround I found is to add the following to my xml > file : > <qemu:commandline> > <qemu:arg value='-vga'/> > <qemu:arg value='none'/> > </qemu:commandline> > > What do you think about adding a "none" model type for video cards ? I know it > is a bit strange to declare a video card in order to have none... > I don't know the QEMU driver well, but maybe this could be handled by the > driver ? i.e. "no VGA card when the machine is vexpress-a9". Not the first time we've had to do that (for example, we support 'none' for the memballoon device, as well as for a <seclabel> tag when there is no labeling to be done), all to maintain back-compat where the defaults auto-populate devices. So your idea sounds reasonable on that front. However, I also wonder if this is a case where our code for post-parse touchups could be made smarter to not provide a cirrus default on architectures that don't support it, so that you would get the correct behavior without having to use an explicit none. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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