linux-kernel - Re: [REDO PATCH v7] perf/x86/amd/power: Add AMD accumulated power reporting mechanism

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Message-ID: <20160720025843.GA19295@hr-amur2>
Date:	Wed, 20 Jul 2016 10:58:44 +0800
From:	Huang Rui <ray.huang@....com>
To:	Vince Weaver <vincent.weaver@...ne.edu>
CC:	Borislav Petkov <bp@...en8.de>, Borislav Petkov <bp@...e.de>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	"Ingo Molnar" <mingo@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	"Robert Richter" <rric@...nel.org>,
	Jacob Shin <jacob.w.shin@...il.com>,
	"Arnaldo Carvalho de Melo" <acme@...nel.org>,
	Kan Liang <kan.liang@...el.com>,
	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>,
	Guenter Roeck <linux@...ck-us.net>,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: Re: [REDO PATCH v7] perf/x86/amd/power: Add AMD accumulated power
 reporting mechanism

On Tue, Jul 19, 2016 at 02:22:36PM -0400, Vince Weaver wrote:
> On Fri, 17 Jun 2016, Huang Rui wrote:
> 
> > On Thu, Jun 16, 2016 at 06:47:00PM +0200, Borislav Petkov wrote:
> > > On Thu, Jun 16, 2016 at 01:38:14PM +0800, Huang Rui wrote:
> > > > I was told this feature would be supported on fam15h 60h, 70h and
> > > > later processors before. Just checked the fam16h model 30h BKDG, yes,
> > > > it should be also supported. But I didn't test that platform, if you
> > > > confirm it works in your side. We can enable it.
> > > 
> > > You might want to ask around first whether F16M30's acc power machinery
> > > is even usable? I.e., no errata and whatnot...
> > > 
> > 
> > Yep, I already asked the designers, and was waiting for their
> > feedbacks.
> 
> Was there ever any feedback about any of the problems encountered with AMD 
> APM support?
> 

Vince, apology to late response. We are drafting the erratum for this
feature. Will let you know if it is public.

Thanks,
Rui