Re: [Qemu-devel] [PATCH] scripts: Add qom-tree script as modern equivalent of info qtree

[Paolo Bonzini]

Il 07/02/2014 12:00, Andreas Färber ha scritto:
> Am 07.02.2014 11:41, schrieb Paolo Bonzini:
> > Il 05/02/2014 19:08, Andreas Färber ha scritto:
> > > http://wiki.qemu.org/Features/QOM#TODO
> > >
> > > Anthony wants buses to go away completely. So that seems a legacy
> > > concept to me even though they do not seem to be gone tomorrow.
> >
> > The way I read that, buses would be replaced by controller devices.
> >
> > This is unrelated to showing the devices according to the bus topology
> > (which still exists in either approach), which is what "info qtree"
> > device.  I guess if controller devices existed, you'd add interfaces
> > like BusProvider and BusChildEnumerator, or equivalently some "magic"
> > properties to do the same, and use that in "info qtree".
>
> Actually my point was that in Anthony's model you get devices on their
> controller device simply by looking at link<foo-device> properties on
> the foo controller device. No special bus code is required any more!

Kind of...  There may still be other links (e.g. to the hotplug handler 
in Igor's series), and you may still want to organize your dump so that 
the bus hierarchy is emphasized.  You cannot unconditionally "expand" 
all links, since they can be recursive.

Paolo