Re: [Qemu-devel] QEMU: PCI bus name on PowerPC platforms

["Daniel P. Berrange" <berrange@redhat.com>]

On Wed, Mar 05, 2014 at 03:33:39PM +0100, Paolo Bonzini wrote:
> Il 05/03/2014 15:21, Daniel P. Berrange ha scritto:
> >>alpha/typhoon.c:    b = pci_register_bus(dev, "pci",
> >>mips/gt64xxx_pci.c:     phb->bus = pci_register_bus(dev, "pci",
> >>pci-host/apb.c:    phb->bus = pci_register_bus(DEVICE(phb), "pci",
> >>pci-host/bonito.c:    phb->bus = pci_register_bus(DEVICE(dev), "pci",
> >>sh4/sh_pci.c:    phb->bus = pci_register_bus(DEVICE(dev), "pci",
> >>pci-host/versatile.c:    pci_bus_new_inplace(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), "pci",
> >>
> >>plus pseries which has its own rules because it supports multiple PCI
> >>host bridges, but probably can also be changed from "pci" to NULL.
> >
> >I'm not sure I understand the effect of changing 'pci' to NULL in this
> >code, from libvirt's POV. Would using NULL mean we can rely on using
> >"pci.0" as the default PCI bus name or not ?
> 
> Yes.  But the next bus that the user creates (e.g. from a PCI bridge
> without an "id") would be "pci.1" instead of having a duplicate
> "pci.0").  Needs a bit more testing of course.

What's the status of this ?  I see the patch merged which only changes
the bus name for ppc64  spapr-pci board

commit 1b8601b0ea0b91467561e0bbddd52a833e4b2b1a
Author: Alexey Kardashevskiy <aik@ozlabs.ru>
Date:   Thu Mar 6 14:11:00 2014 +1100

    spapr-pci: Change the default PCI bus naming

but AFAICT nothing got merged to change this for all the other boards as
discussed here :-(  This is painful for libvirt since we have todo even
more hacks triggered off machine names now, instead of being able to
rely on pci.0 naming as we hoped.


Regards,
Daniel
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