[libvirt] [PATCH 2/3] add pci-brige device command line for qemu

[Ján Tomko]

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

Jan