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References: <20200224141142.25445-1-ionela.voinescu@arm.com> <20200224141142.25445-2-ionela.voinescu@arm.com>
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From:   Valentin Schneider <valentin.schneider@arm.com>
To:     Ionela Voinescu <ionela.voinescu@arm.com>
Cc:     catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com,
        maz@kernel.org, suzuki.poulose@arm.com, sudeep.holla@arm.com,
        lukasz.luba@arm.com, dietmar.eggemann@arm.com, rjw@rjwysocki.net,
        peterz@infradead.org, mingo@redhat.com, vincent.guittot@linaro.org,
        viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-pm@vger.kernel.org
Subject: Re: [PATCH v4 1/7] arm64: add support for the AMU extension v1
Message-ID: <jhjpne3ygmm.fsf@arm.com>
In-reply-to: <20200224141142.25445-2-ionela.voinescu@arm.com>
Date:   Mon, 24 Feb 2020 18:39:37 +0000
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Sender: linux-kernel-owner@vger.kernel.org
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Ionela Voinescu writes:

> The activity monitors extension is an optional extension introduced
> by the ARMv8.4 CPU architecture. This implements basic support for
> version 1 of the activity monitors architecture, AMUv1.
>
> This support includes:
> - Extension detection on each CPU (boot, secondary, hotplugged)
> - Register interface for AMU aarch64 registers
> - amu=[0/1/on/off/y/n] kernel parameter to disable detection and
>   counter access at runtime
>
> Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Cc: Marc Zyngier <maz@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>

Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>