linux-kernel - Re: [PATCH v4 0/5] Add support for the ARMv8.2 Statistical Profiling Extension

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Message-ID: <20170612110823.GA27319@leverpostej>
Date:   Mon, 12 Jun 2017 12:08:23 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Will Deacon <will.deacon@....com>, kim.phillips@....com
Cc:     linux-arm-kernel@...ts.infradead.org, marc.zyngier@....com,
        tglx@...utronix.de, peterz@...radead.org,
        alexander.shishkin@...ux.intel.com, robh@...nel.org,
        suzuki.poulose@....com, pawel.moll@....com,
        mathieu.poirier@...aro.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/5] Add support for the ARMv8.2 Statistical Profiling
 Extension

On Mon, Jun 05, 2017 at 04:22:52PM +0100, Will Deacon wrote:
> Hi all,
>
> This is the sixth posting of the patches previously posted here:
>
>   rfcv1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/476450.html
>   rfcv2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/479387.html
>      v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/483684.html
>      v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-April/499938.html
>      v3: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-May/507132.html
>
> The main change since v3 is that I have reworked and fixed the CPU hotplug
> and notifier bits, in light of review comments from tglx.
>
> The architecture documentation is available here:
>
>   https://developer.arm.com/products/architecture/a-profile/docs/ddi0586/latest/arm-architecture-reference-manual-supplement-statistical-profiling-extension-for-armv8-a

Kim, do you have any version of the userspace side that we could look
at?

For review, it would be really helpful to have something that can poke
the PMU, even if it's incomplete or lacking polish.

Thanks,
Mark.
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