Message-ID: <445B96E1.3080401@zytor.com>
Date: Fri, 05 May 2006 11:18:09 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Andi Kleen <ak@suse.de>
CC: linux-kernel@vger.kernel.org
Subject: Re: Bugs aren't features: X86_FEATURE_FXSAVE_LEAK
References: <445B7EF0.6090708@zytor.com> <p733bfo5ol1.fsf@bragg.suse.de>
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Andi Kleen wrote:
> "H. Peter Anvin" <hpa@zytor.com> writes:
> 
>> The recent fix for the AMD FXSAVE information leak had a problematic
>> side effect.  It introduced an entry in the x86 features vector which
>> is a bug, not a feature.
> 
> It's a non issue because it affects all AMD CPUs (except K5/K6).
> You'll never find a system where only some CPUs have this problem.
> 

It's still wrong architecturally, and we should have a sane way to deal with this as well 
as other bugs.  This isn't the only bug -- we're getting a decent-size collection of them 
already -- and not all of them is going to have that particular property.

	-hpa

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