linux-kernel - Re: [PATCH v4.4 v4.9 v4.14] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55

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Date:   Mon, 4 Oct 2021 13:09:14 +0200
From:   Greg KH <greg@...ah.com>
To:     Nanyong Sun <sunnanyong@...wei.com>
Cc:     catalin.marinas@....com, will@...nel.org, suzuki.poulose@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, james.morse@....com,
        hayashi.kunihiko@...ionext.com
Subject: Re: [PATCH v4.4 v4.9 v4.14] arm64: Extend workaround for erratum
 1024718 to all versions of Cortex-A55

On Wed, Sep 29, 2021 at 03:52:10PM +0800, Nanyong Sun wrote:
> From: Suzuki K Poulose <suzuki.poulose@....com>
> 
> commit c0b15c25d25171db4b70cc0b7dbc1130ee94017d upstream.
> 
> The erratum 1024718 affects Cortex-A55 r0p0 to r2p0. However
> we apply the work around for r0p0 - r1p0. Unfortunately this
> won't be fixed for the future revisions for the CPU. Thus
> extend the work around for all versions of A55, to cover
> for r2p0 and any future revisions.
> 
> Cc: stable@...r.kernel.org #v4.4 v4.9 v4.14
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: James Morse <james.morse@....com>
> Cc: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> Link: https://lore.kernel.org/r/20210203230057.3961239-1-suzuki.poulose@arm.com
> [will: Update Kconfig help text]
> Signed-off-by: Will Deacon <will@...nel.org>
> [Nanyon: adjust for stable version below v4.16, which set TCR_HD earlier
> in assembly code]
> Signed-off-by: Nanyong Sun <sunnanyong@...wei.com>

Now queued up,t hanks.

greg k-h