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


From: Paolo Bonzini
Subject: Re: [Qemu-devel] QEMU: PCI bus name on PowerPC platforms
Date: Wed, 05 Mar 2014 15:33:39 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

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.

Paolo




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