Date: Fri, 25 May 2007 00:50:25 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dave Jones <davej@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Venki Pallipadi <venkatesh.pallipadi@intel.com>,
       Len Brown <len.brown@intel.com>,
       linux-kernel <linux-kernel@vger.kernel.org>, Andi Kleen <ak@suse.de>
Subject: Re: [PATCH] Display Intel Dynamic Acceleration feature in
 /proc/cpuinfo
Message-ID: <20070525005025.236d2483@the-village.bc.nu>
In-Reply-To: <20070524224154.GA29337@redhat.com>
References: <20070523224637.GB15887@linux-os.sc.intel.com>
	<20070524150223.41063046.akpm@linux-foundation.org>
	<46560E4F.2080009@zytor.com>
	<20070524224154.GA29337@redhat.com>
Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street,
 Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a
 Lloegr o'r rhif cofrestru 3798903
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 830
Lines: 26

On Thu, 24 May 2007 18:41:54 -0400
Dave Jones <davej@redhat.com> wrote:

> On Thu, May 24, 2007 at 03:14:39PM -0700, H. Peter Anvin wrote:
> 
>  > pbe collides with abuse by at least two vendors (AMD and
>  > Cyrix/Centaur/VIA) of this bit for 3DNow.
> 
> Unless I'm mistaken,
> 
> pbe comes from cpuid level 1
> 
> 3dnow comes from cpuid level 0x80000001
> though I did notice that amd have it in edx, whilst via have it in ecx
> curiously.

The older AMD docs (CPU rev guide) list bit 31 of both 0x80000001 and
0x00000001 as 3dnow

All their example code/docs say to use 0x80000001 

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/