[SeaBIOS] [PATCH v3 2/5] hw/pci: introduce pcie-pci-bridge device
Marcel Apfelbaum
marcel at redhat.com
Tue Aug 1 17:45:13 CEST 2017
On 01/08/2017 18:32, Michael S. Tsirkin wrote:
> On Mon, Jul 31, 2017 at 09:40:41PM +0300, Alexander Bezzubikov wrote:
>>>> +typedef struct PCIEPCIBridge {
>>>> + /*< private >*/
>>>> + PCIBridge parent_obj;
>>>> +
>>>> + bool msi_enable;
>>>
>>>
>>> Please rename the msi_enable property to "msi" in order
>>> to be aligned with the existent PCIBridgeDev and
>>> consider making it OnOffAuto for the same reason.
>>> (I am not sure about the last part though, we have
>>> no meaning for "auto" here)
>>>
>>
>> Agreed about "msi", but OnOffAuto looks weird to me
>> as we always want MSI to be enabled.
>
Hi Michael,
> Why even have a property then? Can't you enable it unconditionally?
>
Because of a current bug in Linux kernel:
https://www.spinics.net/lists/linux-pci/msg63052.html
msi will not work until the patch is merged. Even when
it will be merged, not all linux kernels will contain the patch.
Disabling msi is a workaround for the above case.
Thanks,
Marcel
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