linux-kernel - Re: [RFC PATCH] EDAC, ghes: Enable per-layer error reporting for ARM

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Date:   Fri, 20 Jul 2018 06:10:05 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Tyler Baicar <tbaicar@...eaurora.org>
Cc:     James Morse <james.morse@....com>, harba@....qualcomm.com,
        mchehab@...nel.org, linux-edac@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] EDAC, ghes: Enable per-layer error reporting for ARM

On Thu, Jul 19, 2018 at 02:36:21PM -0400, Tyler Baicar wrote:
> With the current ghes_edac setup, it seems the only way this could
> work would be to have the firmware always report the module value to

My experience with firmware so far is that it is a lost cause,
considering all the bugs, snafus and incompleteness it demonstrates...

> The other obvious but more messy way would be to have notifiers
> register to be called by ghes_edac and have a custom EDAC driver for
> each CPU to properly populate their layer information.

... which is what we do on x86 and whitelist only known-good platforms
in ghes_edac, which claim that their fw info is correct.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--