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

[Michael S. Tsirkin]

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?

-- 
MST