From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933356Ab1LFOPw (ORCPT ); Tue, 6 Dec 2011 09:15:52 -0500 Received: from s15228384.onlinehome-server.info ([87.106.30.177]:47060 "EHLO mail.x86-64.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933284Ab1LFOPv (ORCPT ); Tue, 6 Dec 2011 09:15:51 -0500 Date: Tue, 6 Dec 2011 15:15:43 +0100 From: Borislav Petkov To: "Srivatsa S. Bhat" Cc: Ingo Molnar , Fenghua Yu , "Rafael J. Wysocki" , Thomas Gleixner , H Peter Anvin , Linus Torvalds , Andrew Morton , Tony Luck , Arjan van de Ven , Suresh B Siddha , Len Brown , Randy Dunlap , Konrad Rzeszutek Wilk , Peter Zijlstra , linux-kernel , linux-pm , x86 , Tejun Heo , "Herrmann3, Andreas" Subject: Re: [PATCH v4 0/7] x86: BSP or CPU0 online/offline Message-ID: <20111206141543.GA19241@aftab> References: <1321075592-31600-1-git-send-email-fenghua.yu@intel.com> <20111206084230.GC30062@elte.hu> <20111206085816.GA11116@elte.hu> <4EDDE5D0.7030906@linux.vnet.ibm.com> <20111206103500.GD15966@elte.hu> <4EDDF2DE.7020701@linux.vnet.ibm.com> <20111206130020.GB28735@gere.osrc.amd.com> <4EDE20F5.4030601@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4EDE20F5.4030601@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 06, 2011 at 07:34:37PM +0530, Srivatsa S. Bhat wrote: > > Not blindly, the microcode is still verified. > > > I saw your other mail about the validity of this whole scenario, and I > kind of agree to your point. > > My thoughts below might not be so relevant/significant considering that, > but anyways, just to understand what you said above: > I didn't quite find where the microcode is verified if the kernel happens > to have the microcode image already. Sorry, I might not've been clear enough: it is still verified by the _hardware_, regardless of whether the ucode loader checks it or not. Remember, hw guys don't trust sw guys and the reverse holds true too. :-) HTH. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551