Message-ID: <486A95F1.3080007@zytor.com>
Date: Tue, 01 Jul 2008 13:39:13 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Jeremy Fitzhardinge <jeremy@goop.org>
CC: Sean Young <sean@mess.org>, Rusty Russell <rusty@rustcorp.com.au>,
       linux-kernel@vger.kernel.org
Subject: Re: Regression: boot failure on AMD Elan TS-5500
References: <20080616121138.GA51097@atlantis.8hz.com> <200806162327.34912.rusty@rustcorp.com.au> <48566C88.6000702@goop.org> <20080616161944.GA53539@atlantis.8hz.com> <20080630214347.GA57988@atlantis.8hz.com> <4869558A.9020907@goop.org> <48695871.8000805@zytor.com> <48695F88.9080905@goop.org> <48696167.6050000@zytor.com> <20080701195942.GA76608@atlantis.8hz.com> <486A9257.1050302@zytor.com> <486A938D.3080009@goop.org>
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Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
>> Not really.  In particular, I really don't want to add something that 
>> is even remotely likely to break on other platforms, and a fence 
>> instruction is relatively recent.
> 
> I wonder if a cpuid would do the trick?  Do we still support cpuid-less 
> processors?

Yes, we do.  Worst case, we could bypass it, but I'd like to understand 
what the real constraint is, here.

	-hpa
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