On Fri, Jul 07, 2017 at 06:39:03PM +0200, Andreas Kinzler wrote:
> Hello,
> 
> I noticed that PCI passthrough for an LSI SAS HBA 9211 did not longer work 
> (at least under Windows) when using Xen 4.8.1.
> I then bisected through various released versions and finally I narrowed it 
> down to
> 
> 4.5.5 (with qemu from Xen 4.6.5) -> working
> 4.6.0-rc1 (with qemu from Xen 4.6.5) -> no longer working
>

So can you please bisect which exact commit between Xen 4.5 and 4.6 causes the 
problem? 


> 4.6.4, 4.7.2, 4.8.1 -> no longer working
> 
> dom0 kernel is 4.8.17 but that should not matter.
> 
> PCI passthrough is still working when initializing the controller BIOS in 
> Seabios, but when Windows starts
> it is stuck in an endless loop of spinning dots (see first seconds of 
> https://www.youtube.com/watch?v=3za5fsfYftQ).
> My guess is that is has something to do with PCI enumeration.
> 
> Any ideas? Help?
> 
> Regards Andreas
> 


Thanks,

-- Pasi


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