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Date: Thu, 8 Jan 2015 17:27:25 +0800
From: "Wangting (Kathy)" <kathy.wangting@huawei.com>
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Subject: Re: [Qemu-devel] Fwd: [question] About MSI for vioscsi
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To: Vadim Rozenfeld <vrozenfe@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>



On 2015-1-8 17:01, Vadim Rozenfeld wrote:
> On Thu, 2015-01-08 at 16:40 +0800, Wangting (Kathy) wrote:
>> Hi Vadim,
>>
>>    In order to enable MSI for vioscsi in virtio-win-0.1-74, I try to merge
>>
>> the patch about Bug 1077566 into it, but I find that MSI still doesn't work,
>>
>> because the value of IRQ is not negative in the device manager.
>>
>>    I try to trace the I/O path with ENABLE_COM_DEBUG, and I find that
>>
>> pMsixCapOffset->MessageControl.MSIXEnable is zero when
>>
>> StorPortGetBusData returned in VioScsiFindAdapter, so MSI can't be enabled.
>>
>>    I have tested that MSI is successfully enabled in virtio-win-0.1-81.
>>
>> But I still want to find out why the patch is not work in virtio-win-0.1-74.
>>
>> Is there some important points I missed?
> 
> Did you enable MSISupported in inf file?
> 
> Cheers,
> Vadim.
> 
Where is the inf file? Do you mean qemupciserial.inf?
>>
>>    Thank you very much.
>>
>>    Best wishes,
>>
>>    Ting Wang
>>
>>
>>
>>
>>
>>
>>
>>
> 
> 
> 
>