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Message-ID: <20090811094406.GA16173@aftab> Date: Tue, 11 Aug 2009 11:44:06 +0200 From: Borislav Petkov <borislav.petkov@....com> To: Kevin Winchester <kjwinchester@...il.com> CC: 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 On Mon, Aug 10, 2009 at 07:56:45PM -0300, Kevin Winchester wrote: > Due to an erratum with certain AMD Athlon 64 processors, the BIOS may > need to force enable the LAHF_LM capability. Unfortunately, in at > least one case, the BIOS does this even for processors that do not > support the functionality. > > Add a specific check that will clear the feature bit for processors > known not to support the LAHF/SAHF instructions. > > Signed-off-by: Kevin Winchester <kjwinchester@...il.com> Acked-by: Borislav Petkov <borislav.petkov@....com> -- Regards/Gruss, Boris. Operating | Advanced Micro Devices GmbH System | Karl-Hammerschmidt-Str. 34, 85609 Dornach b. München, Germany Research | Geschäftsführer: Thomas M. McCoy, Giuliano Meroni Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München (OSRC) | Registergericht München, HRB Nr. 43632 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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