linux-kernel - Re: [PATCH v3] arm64: cpu_errata: Add Kryo to Falkor 1003 errata

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Message-ID: <20171214151858.GH4527@arm.com>
Date:   Thu, 14 Dec 2017 15:18:58 +0000
From:   Will Deacon <will.deacon@....com>
To:     Stephen Boyd <sboyd@...eaurora.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] arm64: cpu_errata: Add Kryo to Falkor 1003 errata

On Wed, Dec 13, 2017 at 02:19:37PM -0800, Stephen Boyd wrote:
> The Kryo CPUs are also affected by the Falkor 1003 errata, so
> we need to do the same workaround on Kryo CPUs. The MIDR is
> slightly more complicated here, where the PART number is not
> always the same when looking at all the bits from 15 to 4. Drop
> the lower 8 bits and just look at the top 4 to see if it's '2'
> and then consider those as Kryo CPUs. This covers all the
> combinations without having to list them all out.
> 
> Fixes: 38fd94b0275c ("arm64: Work around Falkor erratum 1003")
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> ---

Acked-by: Will Deacon <will.deacon@....com>

Thanks for respinning this. Catalin -- can you take this for 4.16, please?

Will