linux-kernel - Re: edac driver injection of uncorrected errors & utils

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Message-ID: <20181128234415.GH16830@zn.tnic>
Date:   Thu, 29 Nov 2018 00:44:15 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Tracy Smith <tlsmith3777@...il.com>
Cc:     york.sun@....com, linux-edac@...r.kernel.org,
        util-linux@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>
Subject: Re: edac driver injection of uncorrected errors & utils

On Wed, Nov 28, 2018 at 04:14:24PM -0600, Tracy Smith wrote:
> Is there another way of creating an uncorrected error without crashing
> Linux using the layerscape driver? I would like to see a UE error
> collected without a Linux crash scenario because I need to validate
> UEs are being collected.

It depends on whether the hardware is causing the crash on uncorrectable
error to prevent data corruption or the error handler is calling panic()
or somesuch. If it is the former, then you need to disable that feature
- if at all possible (no clue what that platform does).

If it is the latter, you can comment out the panic() for testing
purposes only and inject then. For an example what x86 does, see
"tolerant" here:

Documentation/x86/x86_64/machinecheck

HTH.

-- 
Regards/Gruss,
    Boris.

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