linux-kernel - Re: [PATCH 0/7] perf, x86: Implement AMD IBS

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Message-ID: <20110816210503.GZ11702@erda.amd.com>
Date:	Tue, 16 Aug 2011 23:05:03 +0200
From:	Robert Richter <robert.richter@....com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/7] perf, x86: Implement AMD IBS

On 12.08.11 21:43:44, Robert Richter wrote:
> On 02.08.11 07:29:55, Peter Zijlstra wrote:
> > Right, so comparing Fam10 to Fam12,
> > 
> > + IbsOpCtl.19:58
> > + IbsOpData.38
> > - IbsOpData2.4:5
> 
> Yeah, good catch. This is due to the different northbridge
> implementations. I will ask the hw guys how to handle this.

Both bits are meant to be architectural and defined the same on all
cpus. On families 12h and 14h they always return 0. The documentation
will be updated accordingly.

Thanks,

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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