linux-kernel - Re: [git pull] x86 fixes (NOPL issue)

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Message-ID: <48C201E5.7080703@zytor.com>
Date:	Fri, 05 Sep 2008 21:07:01 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	Yinghai Lu <yhlu.kernel@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git pull] x86 fixes (NOPL issue)

Robert Hancock wrote:
>>
>> if so, should only test on VIA chips.
> 
> The virtual CPUs are more of a problem. They can't be distinguished from 
> the real CPU models they are emulating other than by actually testing.

Right, hence the first-principles test.  In theory we could just execute 
the test on ALL CPUs, but I have excluded family < 6 simply because 
there is a (very) remote possibility one of them might have used that 
opcode for something completely different.

	-hpa
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