From: "H. Peter Anvin" <hpa@zytor.com>
To: Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Bugs aren't features: X86_FEATURE_FXSAVE_LEAK
Date: Fri, 05 May 2006 11:18:09 -0700 [thread overview]
Message-ID: <445B96E1.3080401@zytor.com> (raw)
In-Reply-To: <p733bfo5ol1.fsf@bragg.suse.de>
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
next prev parent reply other threads:[~2006-05-05 18:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-05 16:36 Bugs aren't features: X86_FEATURE_FXSAVE_LEAK H. Peter Anvin
2006-05-05 18:11 ` Andi Kleen
2006-05-05 18:18 ` H. Peter Anvin [this message]
2006-05-05 18:27 ` Andi Kleen
2006-05-06 4:16 ` Christer Weinigel
2006-05-09 14:38 ` Bill Davidsen
[not found] <69bvw-2zO-5@gated-at.bofh.it>
[not found] ` <69d4M-4Yx-19@gated-at.bofh.it>
[not found] ` <69mqY-1Ci-9@gated-at.bofh.it>
2006-05-06 17:37 ` Robert Hancock
2006-05-08 17:47 ` H. Peter Anvin
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