linux-kernel - Re: [PATCH v5 3/5] ghes_edac: add platform check to enable ghes

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Date:   Fri, 1 Sep 2017 11:14:40 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Toshi Kani <toshi.kani@....com>
Cc:     rjw@...ysocki.net, mchehab@...nel.org, tony.luck@...el.com,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/5] ghes_edac: add platform check to enable ghes_edac

On Thu, Aug 31, 2017 at 01:36:37PM -0600, Toshi Kani wrote:
> The ghes_edac driver was introduced in 2013 [1], but it has not
> been enabled by any distro yet.  This driver obtains error info
> from firmware interfaces, which are not properly implemented on
> many platforms, as the driver always emits the messages below:
> 
>  This EDAC driver relies on BIOS to enumerate memory and get error reports.
>  Unfortunately, not all BIOSes reflect the memory layout correctly
>  So, the end result of using this driver varies from vendor to vendor
>  If you find incorrect reports, please contact your hardware vendor
>  to correct its BIOS.
> 
> To get out from this situation, add a platform check to selectively
> enable the driver on the platforms that are known to have proper
> firmware implementation.  Platform vendors can add their platforms
> to the list when they support ghes_edac.
> 
> "ghes_edac.force_load=1" skips this platform check.
> 
> [1]: https://lwn.net/Articles/538438/
> Signed-off-by: Toshi Kani <toshi.kani@....com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> Cc: Tony Luck <tony.luck@...el.com>
> ---
> v5
> - Remove prefix from 'force_load'
> - Update comment of force_load option
> ---
>  drivers/edac/ghes_edac.c |   28 +++++++++++++++++++++++-----
>  1 file changed, 23 insertions(+), 5 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

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