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Re: [Xen-devel] [BUG] IGD-PT doesn't work on Skylake-S client


Thanks for putting in the effort to post bug reports. We appreciate this
a lot. I skim through all log files. There is no doubt a lot of
information there.

On Fri, May 27, 2016 at 06:57:19AM +0000, Zhang, PengtaoX wrote:
> Bug detailed description:
> ----------------
> 1. Create a rhel7.1 guest with IGD-PT on SKL-S client , login guest and run 
> 3D(nexuiz) , opencl(beignet) , media(transcode ,encode,decode) test , all 
> test are run failed .
> 2. All these test could run pass on Boardwell-UP platform .
> 3. The SKL-H client and BDW-UP platform are using the same hard disk to test .
> Environment :
> ----------------
> HW: Skylake-S

Hmm... Not sure how many people have such hardware here.

> Xen: Xen 4.7.0 RC3
> Dom0: Linux 4.6.0
> Reproduce steps:
> ----------------
> 1.Install redhat 6.7 OS on Skylake-S client as base OS , then compile and 
> install  ,xen and Dom0, reboot from xen .
> 2.Create a rhel7.1 guest (include 3D, OpenCL ,Media SDK) with IGD-PT .
>       Hide graphic  device by : xl pci-assignable-add 00:02.0
>       Create guest by : xl create config-hvm.log
> 3.Login guest and run 3D , OpenCL , Media test .

All in all, the setup seem to be quite complicated. I'm not sure what I
can help here. For upstream to help with debugging this issue, you need
to provide a few bit-size steps. The simpler the better.

Maybe start with debugging various errors shown in guest / hv log files?
If you or someone from Intel can hunt down the culprit (particular code
path, offending instructions etc) that would be great.


> Current result:
> ----------------
> All 3D ,Opencl ,Media test are failed on Skylake-S client .
> Base error log:
> ----------------
> I attached both Boardwell-UP and Skylake-S test log .
> Regards,
> Pengtao

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