Re: [Xen-devel] [PATCH] x86: avoid HPET use on certain Intel platforms

[Andreas Kinzler <hfp@xxxxxxxxx>]

On 22.11.2019 13:58, Andrew Cooper wrote:
> On 22/11/2019 12:57, Jan Beulich wrote:
> > On 22.11.2019 13:50, Andrew Cooper wrote:
> > > On 22/11/2019 12:46, Jan Beulich wrote:
> > > > Linux commit fc5db58539b49351e76f19817ed1102bf7c712d0 says
> > > >
> > > > "Some Coffee Lake platforms have a skewed HPET timer once the SoCs entered
> > > >   PC10, which in consequence marks TSC as unstable because HPET is used as
> > > >   watchdog clocksource for TSC."
> > > >
> > > > Adjust a few types in touched or nearby code at the same time.
> > > Reported-by ?
> > The Linux commit has a Suggested-by, but no Reported-by. Do you
> > want me to copy that one? Or else do you have any suggestion as
> > to who the reporter was?
> Well - this patch was identified by someone on xen-devel, which I
> presume was your basis for looking into it.
https://lists.xenproject.org/archives/html/xen-devel/2019-11/msg00662.html

BTW: Xeon E-2136 @ C242 has 8086:3eca as ID. One needs to check with 
Intel which combinations are really affected.
Regards Andreas

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