在 2013-01-07一的 17:57 +0100，Ján Tomko写道：
> On 01/04/13 03:28, li guang wrote:
> > 在 2013-01-03四的 16:13 +0100，Ján Tomko写道：
> >> On 12/26/12 02:00, liguang wrote:
> >>> @@ -1801,10 +1803,13 @@ qemuBuildDeviceAddressStr(virBufferPtr buf,
> >>> * When QEMU grows support for > 1 PCI domain, then pci.0 change
> >>> * to pciNN.0 where NN is the domain number
> >>> */
> >>> - if (qemuCapsGet(caps, QEMU_CAPS_PCI_MULTIBUS))
> >>> + if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCIBRIDGE) {
> >>> + virBufferAsprintf(buf, ",bus=pci-bridge%d", info->addr.pci.bus);
> >>> + } else if (qemuCapsGet(caps, QEMU_CAPS_PCI_MULTIBUS)) {
> >>> virBufferAsprintf(buf, ",bus=pci.0");
> >>
> >> Is there any way (or plan) to use more pci buses with QEMU other than
> >> with the pci bridges? If not, we could just name the bridges pci.%d. (If
> >> we index the bridges from 1).
> >
> > as far as I know, qemu can't use multi-pci-bus,
> > so only pci.0 accepted now.
> >
> >>
> >>> - else
> >>> + } else {
> >>> virBufferAsprintf(buf, ",bus=pci");
> >>> + }
> >>> if (info->addr.pci.multi == VIR_DEVICE_ADDRESS_PCI_MULTI_ON)
> >>> virBufferAddLit(buf, ",multifunction=on");
> >>> else if (info->addr.pci.multi == VIR_DEVICE_ADDRESS_PCI_MULTI_OFF)
> >>> @@ -3455,6 +3460,32 @@ error:
> >>> return NULL;
> >>> }
> >>
> >>
> >>>
> >>> +char *
> >>> +qemuBuildPCIbridgeDevStr(virDomainPCIbridgeDefPtr dev,
> >>> + qemuCapsPtr caps, int idx)
> >>> +{
> >>> + virBuffer buf = VIR_BUFFER_INITIALIZER;
> >>> +
> >>> + virBufferAsprintf(&buf, "pci-bridge,chassis_nr=1");
> >>
> >> The chassis number has to be unique for each bridge.
> >
> > chassis number is not so important,
> > here, I just set all bridges in same chassis.
> >
>
>
> > Each bridge must have a unique chassis #.
> > You *must* set it to a value > 0.
> > I don't check that it is unique, just that it is >0.
> > If you make it non unique, guest will be confused.
>
> http://lists.gnu.org/archive/html/qemu-devel/2012-02/msg02765.html
Oh, to be a little pedantic, please refer to PCI-TO-PCI BRIDGE
ARCHITECTURE SPECIFICATION, REV 1.2, page 146, as I said before,
'I just set all bridges in same chassis', that means, 1 main chassis(#0)
,1 expansion chassis(#1), maybe it seems strange, but It's not illegal.
of course, I will consider your advice to make it unique.
Thanks!
>
> Jan
--
regards!
li guang
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