linux-kernel - Re: [PATCH v3] x86: clear incorrectly forced X86_FEATURE_LAHF

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Message-ID: <20090813122337.GB7029@aftab>
Date:	Thu, 13 Aug 2009 14:23:37 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	Kevin Winchester <kjwinchester@...il.com>
CC:	Mikael Pettersson <mikpe@...uu.se>,
	Borislav Petkov <petkovbb@...glemail.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] x86: clear incorrectly forced X86_FEATURE_LAHF_LM
 flag

Hi Kevin,

On Wed, Aug 12, 2009 at 08:02:14PM -0300, Kevin Winchester wrote:
> So that feature is definitely set.

thanks for testing. As a reply to that follow two patches for you to
test. The one is adding some more msr functionality and the second is
based on your original one which should in addition turn off the cpuid
bit. Please apply, compile, reboot and run the small app again to verify
that ECX[0] is now off.

Let me know how it goes.

Thanks.

-- 
Regards/Gruss,
Boris.

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