linux-kernel - Re: [NAK] Re: [PATCH -v2 9/9] ACPI, APEI, Generic Hardware Error Source POLL/IRQ/NMI notification type support

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Message-ID: <AANLkTin=WM5AN_z_SxaKgOta-Q0xQnyO2S-G5w7JOQSh@mail.gmail.com>
Date:	Mon, 25 Oct 2010 10:07:36 -0700
From:	Tony Luck <tony.luck@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>, Len Brown <lenb@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Borislav Petkov <petkovbb@...glemail.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Don Zickus <dzickus@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Borislav Petkov <bp@...64.org>
Subject: Re: [NAK] Re: [PATCH -v2 9/9] ACPI, APEI, Generic Hardware Error
 Source POLL/IRQ/NMI notification type support

On Mon, Oct 25, 2010 at 5:04 AM, Mauro Carvalho Chehab
<mchehab@...hat.com> wrote:
> We had some discussions with Intel during the Collaboration summit about that, trying to
> integrate Nehalem EX on such environment, with, unfortunately, didn't happen, as Intel
> didn't release any (public) datasheet describing Nehalem EX memory controller, nor wrote
> such driver.

The chipset registers that are needed to write an EDAC driver for
Nehalem-EX (a.k.a Xeon
7500 series) are not accessible to OS (ring 0) code. Documenting them
wouldn't change this.

> As most of us will be in Boston next week, I've reserved a BoF at Plumbers for us to discuss
> about this subject:
>
> http://www.linuxplumbersconf.org/2010/ocw/proposals/921

An excellent idea. See you there.

-Tony
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