linux-kernel - Re: [PATCH 2/4] perf/x86: Fix format definition of SNB-EP uncore QPI box

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Date:	Mon, 23 Jul 2012 18:36:22 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>, mingo@...e.hu,
	andi@...stfloor.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] perf/x86: Fix format definition of SNB-EP uncore
 QPI box

On Mon, 2012-07-23 at 18:33 +0200, Stephane Eranian wrote:
> 
> DEFINE_UNCORE_FORMAT_ATTR(event, event, "config:0-7,21");
> 
> Assuming the event parser supports disjoint bits. 

It does. Userspace should provide a 9bit value in this case and the 9th
bit will be stored in bit 21.
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