Subject: Re: [PATCH v4 1/7] arm64: add support for the AMU extension v1

From: Valentin Schneider <[email-masked]>
Date: Mon, 24 Feb 2020 18:39:37 +0000

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 <[email-masked]>
> Cc: Catalin Marinas <[email-masked]>
> Cc: Will Deacon <[email-masked]>
> Cc: Suzuki K Poulose <[email-masked]>
> Cc: Marc Zyngier <[email-masked]>
> Cc: Mark Rutland <[email-masked]>

Reviewed-by: Valentin Schneider <[email-masked]>

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