linux-kernel - Re: [PATCH 1/7] apei, mce: Call MCE-specific code only for X86 architecture.

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Date:	Mon, 5 May 2014 16:53:31 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Cc:	rjw@...ysocki.net, lenb@...nel.org, tony.luck@...el.com,
	bp@...e.de, m.chehab@...sung.com, linux-edac@...r.kernel.org,
	x86@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org
Subject: Re: [PATCH 1/7] apei, mce: Call MCE-specific code only for X86
 architecture.

On Mon, May 05, 2014 at 04:34:41PM +0200, Tomasz Nowicki wrote:
> acpi_disable_cmcff as global value can switch off/on MC entries
> analysing via kernel args.

No, it switches off firmware first mode for correctable errors because
of buggy BIOSes - 9ad95879cd1b2 (what else...)

> This glob value resides in x86 ACPI code and has meaning only for MCE
> related mechanism,

Of course it doesn't!

> that is why I have moved it under hest_parse_cmc.

See APEI section in the ACPI spec "18.4 Firmware First Error Handling."

Regardless of what your version of APEI does, you actually shouldn't
need to touch acpi_disable_cmcff at all as it not arch-specific.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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