Re: [Qemu-devel] [PATCH 2/6] pci-assign: Add support for no-route

[Paolo Bonzini <pbonzini@redhat.com>]

Il 02/10/2012 22:12, Alex Williamson ha scritto:
> On Tue, 2012-10-02 at 14:55 -0500, Anthony Liguori wrote:
>> Alex Williamson <alex.williamson@redhat.com> writes:
>>
>>> In the event that a pci-assign device is added to a chipset that
>>> hasn't yet implemented the INTx routing interface, exit gracefully
>>> instead of killing the VM.  I'm sure we'll implement this for q35,
>>> but there's no reason for such a harsh response.
>>>
>>> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
>>> ---
>>>
>>>  hw/kvm/pci-assign.c |    6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git a/hw/kvm/pci-assign.c b/hw/kvm/pci-assign.c
>>> index 05b93d9..7ce0f37 100644
>>> --- a/hw/kvm/pci-assign.c
>>> +++ b/hw/kvm/pci-assign.c
>>> @@ -887,6 +887,12 @@ static int assign_intx(AssignedDevice *dev)
>>>  
>>>      intx_route = pci_device_route_intx_to_irq(&dev->dev, dev->intpin);
>>>      assert(intx_route.mode != PCI_INTX_INVERTED);
>>> +    if (intx_route.mode == PCI_INTX_NOROUTE) {
>>> +        error_report("pci-assign: chipset provides no INTx routing "
>>> +                     "information, but device supports INTx interrupt mode.\n");
>>> +        pci_device_set_intx_routing_notifier(&dev->dev, NULL);
>>> +        return -ENOTSUP;
>>> +    }
>>
>> Please don't use error_report() in new code.  Propagate an Error object
>> using error_setg() and friends.
> 
> That doesn't really seem to be an option since this function is called
> both from the driver initfn and the interrupt routing change notifier.
> Neither of those give me an Error object... suggestions?  Thanks,

Both assigned_dev_update_irq_routing and assigned_dev_update_msi would
have to print the error themselves (qerror_report_err + error_free).
Looks like a waste of time, frankly.

Paolo