linux-kernel - Re: [GIT PULL] arm64 spectre and meltdown mitigations for v4.14-stable

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Date:   Wed, 14 Feb 2018 14:54:20 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        will.deacon@....com, catalin.marinas@....com, marc.zyngier@....com,
        broonie@...aro.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [GIT PULL] arm64 spectre and meltdown mitigations for
 v4.14-stable

On Mon, Feb 12, 2018 at 11:38:01AM +0000, Ard Biesheuvel wrote:
> Hi Greg,
> 
> As mentioned by Will, I have created the v4.14 counterpart of his stable
> backport of the arm64/ARM Spectre/Meltdown mitigations that have been pulled
> into v4.16-rc1.
> 
> Given that this is the v4.15 version backported to v4.14, I have removed any
> mention of 'conflicts' from the commit logs as they are now ambiguous. The
> patches applied surprisingly cleanly, I only needed to drop two patches that
> are already in (the same ones Will mentioned in his PR), and drop another one
> dealing with SPE, support for which did not exist yet in v4.14. I also included
> the patch
> 
>   arm64: move TASK_* definitions to <asm/processor.h>
> 
> from v4.15 to make Robin's Spectre v1 patches apply more cleanly.

I've queued these up now, but if you could pull the whole quilt tree and
verify I got things right, that would be great.  There was some
conflicts with a few previous patches I had already queued up that
touched some "Falkor" errata code.

Specifically 932b50c7c1c65e6f23002e075b97ee083c4a9e71 "arm64: Add
software workaround for Falkor erratum 1041" is the offending patch.  I
think I resolved the merge issues properly, but verifying this would be
wonderful.

thanks,

greg k-h