Re: [Qemu-devel] Fwd: [question] About MSI for vioscsi

[Vadim Rozenfeld]

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.

> 
>    Thank you very much.
> 
>    Best wishes,
> 
>    Ting Wang
> 
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