linux-kernel - Re: [RFC 1/6] x86, NMI, Add symbol definition for NMI magic constants

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Message-ID: <4C8AB80F.6020802@zytor.com>
Date:	Fri, 10 Sep 2010 15:58:23 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Huang Ying <ying.huang@...el.com>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>
Subject: Re: [RFC 1/6] x86, NMI, Add symbol definition for NMI magic constants

On 09/10/2010 01:37 PM, Peter Zijlstra wrote:
> On Fri, 2010-09-10 at 10:51 +0800, Huang Ying wrote:
>> +       return inb(NMI_REASON_PORT);
> 
> I've always wondered, where is this magic stuff documented?
> 

A lot of the pre-2000 stuff is documented in Ralf Brown's Interrupt
List, and the associated book "The Undocumented PC".  A lot was
originally documented in various now-out-of-print IBM technical manuals.

RBIL unfortunately hasn't been updated since 2000.  The good news is
that post 2000 there are a lot more formal standards out there, but not
collected in one convenient place like that.

	-hpa
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