linux-kernel - Re: [PATCH 2/2] arm: pmu: add support for per-cpu PMU interrupts.

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Message-ID: <20120730163701.GH15195@mudshark.cambridge.arm.com>
Date:	Mon, 30 Jul 2012 17:37:02 +0100
From:	Will Deacon <will.deacon@....com>
To:	Chris Smith <chris.smith@...com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"srinidhi.kasagar@...ricsson.com" <srinidhi.kasagar@...ricsson.com>
Subject: Re: [PATCH 2/2] arm: pmu: add support for per-cpu PMU interrupts.

Hi Chris,

On Mon, Jul 30, 2012 at 03:32:12PM +0100, Chris Smith wrote:
> We have systems where the PMU interrupts are PPIs, and so per-cpu. This
> patch adds support for per-cpu PMU interrupts to the perf event code.
> 
> Note that because the dev_id passed to request_percpu_irq has to be
> percpu data, we now pass cpu_hw_events as the dev_id rather than armpmu.
> This only place the dev_id was used was in armpmu_platform_irq, which is
> fixed up accordingly.
> 
> Signed-off-by: Chris Smith <chris.smith@...com>
> ---

I'm actually in the process of moving request/free IRQ into an armpmu
callback, so this patch would fit more neatly into that.

I should have something available this week that you can take a look at.

Will
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