Re: [Qemu-devel] [PATCH][v13] megasas: LSI Megaraid SAS HBA emulation

[Hannes Reinecke <hare@suse.de>]

On 02/21/2012 12:04 AM, Michael S. Tsirkin wrote:
> On Mon, Feb 20, 2012 at 04:17:05PM +0100, Alexander Graf wrote:
>>
>> On 20.02.2012, at 16:16, Hannes Reinecke wrote:
>>
>>> On 02/20/2012 04:13 PM, Alexander Graf wrote:
>>>>
>>>> On 20.02.2012, at 16:11, Hannes Reinecke wrote:
>>>>
>>>>> This patch adds an emulation for the LSI Megaraid SAS 8708EM2 HBA.
>>>>> I've tested it to work with Linux, Windows Vista, and Windows7.
>>>>>
>>>>> Changes since v12:
>>>>> - Fixup flag setting via properties
>>>>> - Disable MSI-X per default
>>>>> - Fixup MSI-X handling
>>>>
>>>> If MSI-X works again, why disable it? :o Does it break in other cases?
>>>>
>>> It doesn't. No idea why.
>>> That's why I disabled it :-)
>>>
>>> The MSI-X vector is signalled, but nothing on the OS side appear to
>>> receive it.
>>> If you got any idea on how to debug it I'm all ears ...
>>
>> Michael, any ideas? IIRC MSI-X used to work in earlier versions, so something recent must've broken it.
>>
>>
>> Alex
> 
> Hmm, there were's any recent changes I'm aware of.
> Try to check that MSIX vector as qemu sees it
> matches the value that the guest set.
> If using kvm, compare against kernel as well.
> Endian-ness issue somehow?
> Are you testing on x86?
> 
Testing on x86_64.
But apparently the (linux) driver doesn't activate MSI-X.
So either I didn't set it up properly in the HBA emulation
or something else went wrong.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
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