linux-kernel - Re: [PATCH 5/5] perf/x86: Add Intel Nehalem-EX uncore support

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Message-ID: <1341420818.19870.10.camel@laptop>
Date:	Wed, 04 Jul 2012 18:53:38 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	"Yan, Zheng" <zheng.z.yan@...el.com>
Cc:	eranian@...gle.com, mingo@...e.hu, andi@...stfloor.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] perf/x86: Add Intel Nehalem-EX uncore support

On Thu, 2012-07-05 at 00:00 +0800, Yan, Zheng wrote:
> 
> > Also, how can a single extra register require 192 bits of config space?
> > 
> Some events in the M-Box and R-Box require programming up to 3 extra
> registers. For example, the event 0x5 in the R-Box requires programming
> extra registers XBR_SET1_MM_CFG, XBR_SET1_MATCH and XBR_SET1_MATCH. 

But shouldn't you then use 3 extra_reg instead of blowing up the one?

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