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Date: Thu, 24 May 2007 15:51:31 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Dave Jones <davej@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, Venki Pallipadi <venkatesh.pallipadi@...el.com>, Len Brown <len.brown@...el.com>, linux-kernel <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...e.de> Subject: Re: [PATCH] Display Intel Dynamic Acceleration feature in /proc/cpuinfo Dave Jones 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. edx is correct. What you're describing is correct for later-level AMD/Cyrix chips, however, when 3DNow! was first introduced they foolishly squatted on the Intel-assigned CPUID flags. However, I have audited all the vendor initialization paths, and we kill off that CPUID bit in all the places that matter. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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