linux-kernel - Re: [PATCH v5 07/13] ARM: smp: Add initialization of CNTVOFF

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Message-ID: <bd94a149-267e-1089-7884-1bf0c7602c43@arm.com>
Date:   Mon, 9 Apr 2018 10:04:30 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Mylène Josserand <mylene.josserand@...tlin.com>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        LABBE Corentin <clabbe.montjoie@...il.com>,
        quentin.schulz@...tlin.com,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 07/13] ARM: smp: Add initialization of CNTVOFF

On 09/04/18 09:24, Geert Uytterhoeven wrote:
> On Wed, Apr 4, 2018 at 4:30 PM, Marc Zyngier <marc.zyngier@....com> wrote:
>> On Wed, 04 Apr 2018 14:59:09 +0100,
>> Mylčne Josserand wrote:
> 
> [Marc: stuck in ISO-8859-1? ;-]

I have no idea what Wanderlust does (that's what I use on my laptop).
But Thunderbird definitely interprets the original posting as 'è', which
should work with a 8859-1. I need to have a look at how to get UTF-8 to
be the default... (I hate email clients).

> 
>>>> It'd be good to take this opportunity to refactor the shmobile code.
>>>
>>> I can do it in this series but I do not have any shmobile platforms so
>>> I will not be able to test my modifications (only compilation).
>>>
>>> If someone can test it for me (who?), it is okay for me to refactor this
>>> code :)
>>
>> I guess you could Cc the shmobile folks (Geert Uytterhoeven, Simon
>> Horman), and get them to review/test the changes.
> 
> Correct. I can test on a remote R-Car E2 ALT board that needs it.
> 
> P.S. Interestingly, none of the Renesas CA15 SoCs seem to suffer from it,
>      only CA7.

I suspect A15 has the courtesy of resetting CNTVOFF to zero, and A7
doesn't. But the letter of the architecture is that it has an "UNKNOWN
reset value".

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...