linux-kernel - Re: [PATCH v4 09/21] arm64: cpufeature: Add global feature override facility

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Message-ID: <a820f460-83dc-f957-2a8c-97ee66129406@arm.com>
Date:   Sat, 23 Jan 2021 15:59:59 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Marc Zyngier <maz@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Brazdil <dbrazdil@...gle.com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Jing Zhang <jingzhangos@...gle.com>,
        Ajay Patil <pajay@....qualcomm.com>,
        Prasad Sodagudi <psodagud@...eaurora.org>,
        Srinivas Ramana <sramana@...eaurora.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        kernel-team@...roid.com
Subject: Re: [PATCH v4 09/21] arm64: cpufeature: Add global feature override
 facility

On 1/18/21 9:45 AM, Marc Zyngier wrote:
> Add a facility to globally override a feature, no matter what
> the HW says. Yes, this sounds dangerous, but we do respect the
> "safe" value for a given feature. This doesn't mean the user
> doesn't need to know what they are doing.
> 
> Nothing uses this yet, so we are pretty safe. For now.
> 
> Signed-off-by: Marc Zyngier <maz@...nel.org>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>