Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752662Ab1EQHDg (ORCPT ); Tue, 17 May 2011 03:03:36 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:60940 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751944Ab1EQHDf (ORCPT ); Tue, 17 May 2011 03:03:35 -0400 Date: Tue, 17 May 2011 09:03:08 +0200 From: Ingo Molnar To: Fenghua Yu , Avi Kivity , Pekka Enberg Cc: Thomas Gleixner , H Peter Anvin , Asit K Mallick , Linus Torvalds , Avi Kivity , Arjan van de Ven , Andrew Morton , Andi Kleen , linux-kernel Subject: Re: [PATCH v2 0/4] Enable SMEP CPU Feature Message-ID: <20110517070308.GC22305@elte.hu> References: <1305581685-5144-1-git-send-email-fenghua.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1305581685-5144-1-git-send-email-fenghua.yu@intel.com> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 938 Lines: 24 * Fenghua Yu wrote: > From: Fenghua Yu > > Intel new CPU supports SMEP (Supervisor Mode Execution Protection). SMEP > prevents kernel from executing code in application. Updated Intel SDM describes > this CPU feature. The document will be published soon. > > Note: This patch set doesn't enable the SMEP feature in KVM. If it's needed, > another patch will be pushed for enabling the feature in KVM. We can do it separately from native kernel support, but i'm sure Avi would agree that SMEP support in KVM would be nice! (as long as it's configurable as well, there might be guest OSs that break if SMEP is enabled, right?) Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/