On Wed, Aug 20, 2014 at 11:30:55AM +0200, Knut Omang wrote:
> On Wed, 2014-08-20 at 10:52 +0200, Paolo Bonzini wrote:
> > Il 20/08/2014 08:53, Knut Omang ha scritto:
> > > A unique bus name is necessary to be able to refer to each instance
> > > from the command line and monitors.
> >
> > Is it needed? Can't you just add id= to the -device option?
>
> Yes, as far as I understand the problem is that the id= would work on
> the ioh3420 device itself, while what is needed here is to name the
> secondary bus of the ioh3420, which I haven't found a way to name from
> the command line.
Did you try using the device name?
For pci bridges, unless you set bus_name, bus name will
match device itself. See this code:
* If we don't specify the name, the bus will be addressed as
* <id>.0, where id is the device id.
* Since PCI Bridge devices have a single bus each, we don't need
* the index:
* let users address the bus using the device name.
*/
if (!br->bus_name && dev->qdev.id && *dev->qdev.id) {
br->bus_name = dev->qdev.id;
}
> Maybe an even better solution would be to have default names for
> everything, if not specified, from a user friendliness perspective?
>
> I suppose this is a more general issue of sensible default values
> though, but the fact that it is easy to create devices which cannot be
> referred has caused me some confusion from time to time.
>
> > Paolo
>
> Thanks,
>
> Knut
