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Date:	Wed, 22 Oct 2014 16:23:47 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Robert Richter <rric@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>, kan.liang@...el.com,
	adrian.hunter@...el.com, acme@...radead.org
Subject: Re: [PATCH v5 12/20] x86: perf: intel_pt: Intel PT PMU driver

On Mon, Oct 13, 2014 at 04:45:40PM +0300, Alexander Shishkin wrote:
> +/*
> + * Capabilities of Intel PT hardware, such as number of address bits or
> + * supported output schemes, are cached and exported to userspace as "caps"
> + * attribute group of pt pmu device
> + * (/sys/bus/event_source/devices/intel_pt/caps/) so that userspace can store
> + * relevant bits together with intel_pt traces.
> + */

Does it make sense to use that AUX record variable data thing for this
instead -- much like what the ARM folks wanted?
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