From mboxrd@z Thu Jan  1 00:00:00 1970
From: Harmandeep Kaur <write.harmandeep@gmail.com>
Subject: Re: Error booting Xen
Date: Wed, 20 Jan 2016 01:25:14 +0530
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To: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Jan Beulich <JBeulich@suse.com>, xen-devel@lists.xen.org
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On Tue, Jan 19, 2016 at 10:38 PM, Dario Faggioli
<dario.faggioli@citrix.com> wrote:
> On Tue, 2016-01-19 at 17:02 +0000, Andrew Cooper wrote:
>> On 19/01/16 16:47, Jan Beulich wrote:
>> > > > > On 19.01.16 at 17:27, <write.harmandeep@gmail.com> wrote:
>> > > Adding 'xsave=0' is working for now. Thank you
>> > > all for your help :)
>> > But that means we actually should get to the bottom of your
>> > problem!
>>
>> There was some discussion on IRC.  `xrstror` was repeatedly taking
>> the
>> same fault; i.e. the fixup code wasn't fixing up suitably.
>>
> Yes, indeed.
>
>> As a first candidate, I expect 83ae0bb2 is a likely candidate.
>> Harmandeep is using a Skylake processor.
>>
> Yes, she is on Skylake. But she's also using master, so,
> AFAICT, 83ae0bb2 is not there.
>
> She will be trying to use staging (and kill xsave=0) soon, and will let
> us know.

I tried booting staging branch but results were identical. Following
line repeats endlessly.
(XEN) traps.c:3290: GPF (0000): ffff82d0801c1cce -> ffff82d080252e5c

$ 'addr2line -e xen-syms ffff82d0801c1cce' returns
'xen/xen/arch/x86/xstate.c:387' which again points to
xsave. Also, adding 'xsave=0' makes it boot just fine.

Full boot log here, http://paste2.org/1DCge9Fb

Thanks and regards,
Harmandeep

> Thanks and Regards,
> Dario
> --
> <<This happens because I choose it to happen!>> (Raistlin Majere)
> -----------------------------------------------------------------
> Dario Faggioli, Ph.D, http://about.me/dario.faggioli
> Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
>