Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S942865AbcJ0OaY (ORCPT ); Thu, 27 Oct 2016 10:30:24 -0400 Received: from mx2.suse.de ([195.135.220.15]:36977 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S942765AbcJ0OaT (ORCPT ); Thu, 27 Oct 2016 10:30:19 -0400 Date: Thu, 27 Oct 2016 16:30:15 +0200 From: Borislav Petkov To: Grzegorz Andrejczuk Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, dave.hansen@linux.intel.com, lukasz.daniluk@intel.com, james.h.cownie@intel.com, jacob.jun.pan@intel.com, Piotr.Luc@intel.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6: 4/4] x86/cpufeature: Add R3MWAIT to CPU features Message-ID: <20161027143015.friq4ji5wahr2cyu@pd.tnic> References: <1477576923-3244-1-git-send-email-grzegorz.andrejczuk@intel.com> <1477576923-3244-5-git-send-email-grzegorz.andrejczuk@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1477576923-3244-5-git-send-email-grzegorz.andrejczuk@intel.com> User-Agent: NeoMutt/20161014 (1.7.1) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1260 Lines: 36 On Thu, Oct 27, 2016 at 04:02:03PM +0200, Grzegorz Andrejczuk wrote: > Add cpu feature for ring 3 monitor/mwait. > Set HWCAP2 1st bit during init. > > Signed-off-by: Grzegorz Andrejczuk > --- > arch/x86/include/asm/cpufeatures.h | 2 ++ > arch/x86/kernel/cpu/intel.c | 4 ++++ > 2 files changed, 6 insertions(+) > > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > index 92a8308..d430200 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -71,6 +71,8 @@ > #define X86_FEATURE_RECOVERY ( 2*32+ 0) /* CPU in recovery mode */ > #define X86_FEATURE_LONGRUN ( 2*32+ 1) /* Longrun power control */ > #define X86_FEATURE_LRTI ( 2*32+ 3) /* LongRun table interface */ > +/* Xeon Phi x200 ring 3 MONITOR/MWAIT enabled */ > +#define X86_FEATURE_PHIR3MWAIT ( 2*32+ 4) This leaf is for Transmeta CPUs: /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */ is KNL close to some Transmeta design, per chance or so? I mean, for this to work, it would have to implement CPUID leaf 0x80860001... -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --