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Re: [libvirt] [RFC 09/12] RFC: Don't reserve slot 1 if a USB controller is defined there



At 08/24/2011 09:42 AM, Wen Congyang Write:
> At 08/22/2011 03:01 AM, Marc-André Lureau Write:
>> ---
>>  src/qemu/qemu_command.c |   10 +++++++++-
>>  1 files changed, 9 insertions(+), 1 deletions(-)
>>
>> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
>> index 9ea4b7c..d25f34f 100644
>> --- a/src/qemu/qemu_command.c
>> +++ b/src/qemu/qemu_command.c
>> @@ -1093,6 +1093,7 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs)
>>  {
>>      int i;
>>      bool reservedIDE = false;
>> +    bool reservedUSB = false;
>>      bool reservedVGA = false;
>>  
>>      /* Host bridge */
>> @@ -1123,13 +1124,20 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs)
>>                  def->controllers[i]->info.addr.pci.slot = 1;
>>                  def->controllers[i]->info.addr.pci.function = 1;
>>              }
>> +        } else if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
>> +                   def->controllers[i]->idx == 0 &&
>> +                   def->controllers[i]->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
>> +                   def->controllers[i]->info.addr.pci.domain == 0 &&
>> +                   def->controllers[i]->info.addr.pci.bus == 0 &&
>> +                   def->controllers[i]->info.addr.pci.slot == 1) {
>> +            reservedUSB = true;
> 
> The first use controller's address is 0:0:1:2, you don't check the function value here.
> I think the code should be like IDE's code:
> if the type is not VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI:
>     init def->controllers[i]->info
> else
>     check the pci address, if the address is wrong, report a error

I read the patch 3, and find that you do not append -usb in the command line while using
usb controller. So all usb controllers should not use slot 1(because we may append
-usbdevice in the command line)

> 
> Thanks
> Wen Congyang
>>          }
>>      }
>>  
>>      /* PIIX3 (ISA bridge, IDE controller, something else unknown, USB controller)
>>       * hardcoded slot=1, multifunction device
>>       */
>> -    if (!reservedIDE &&
>> +    if (!reservedIDE && !reservedUSB &&
>>          qemuDomainPCIAddressReserveSlot(addrs, 1) < 0)
>>          goto error;
>>  
> 
> 
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