From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754221Ab2FLVDd (ORCPT ); Tue, 12 Jun 2012 17:03:33 -0400 Received: from one.firstfloor.org ([213.235.205.2]:53869 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753307Ab2FLVDd (ORCPT ); Tue, 12 Jun 2012 17:03:33 -0400 Date: Tue, 12 Jun 2012 23:03:29 +0200 From: Andi Kleen To: Borislav Petkov , "H. Peter Anvin" , Andi Kleen , x86@kernel.org, eranian@google.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, Andi Kleen Subject: Re: [PATCH 1/2] x86: Track minimum microcode revision globally Message-ID: <20120612210329.GD11413@one.firstfloor.org> References: <1339533234-2265-1-git-send-email-andi@firstfloor.org> <20120612204917.GA26817@liondog.tnic> <4FD7ABFE.6090801@zytor.com> <20120612205956.GB26817@liondog.tnic> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120612205956.GB26817@liondog.tnic> User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 12, 2012 at 10:59:56PM +0200, Borislav Petkov wrote: > On Tue, Jun 12, 2012 at 01:52:14PM -0700, H. Peter Anvin wrote: > > Different CPUs in a multisocket system may have different compatible > > ucode versions. > > Ah, so you need the different ucode for the different steppings of the > cpus on the board, right? Assuming ucode versions are incremented per > F:M:S tuple, of course, then you can have different compatible microcode > versions. I believe just for different models. Different models in a single system may be possible, but are quite unsupported. The code doesn't handle that, but I don't really worry about that. > > Of course, I am not even sure if it makes any sense at all to compare > > microcode versions without qualifying them with F:M:S. It doesn't. But I think this model handles 99.999% of all sane configs, don't really want to complicate it more. -Andi -- ak@linux.intel.com -- Speaking for myself only.