Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753400Ab2FLU3W (ORCPT ); Tue, 12 Jun 2012 16:29:22 -0400 Received: from terminus.zytor.com ([198.137.202.10]:45506 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752144Ab2FLU3U (ORCPT ); Tue, 12 Jun 2012 16:29:20 -0400 Message-ID: <4FD7A687.3040500@zytor.com> Date: Tue, 12 Jun 2012 13:28:55 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Borislav Petkov CC: Peter Zijlstra , Stephane Eranian , linux-kernel@vger.kernel.org, andi@firstfloor.org, mingo@elte.hu, ming.m.lin@intel.com, "Yu, Fenghua" Subject: Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge References: <20120607071531.GA4849@quad> <4FD78BE6.4060207@zytor.com> <20120612190720.GA11137@aftab.osrc.amd.com> <1339529614.31548.104.camel@twins> <20120612194900.GC11137@aftab.osrc.amd.com> In-Reply-To: <20120612194900.GC11137@aftab.osrc.amd.com> X-Enigmail-Version: 1.4.2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 633 Lines: 18 On 06/12/2012 12:49 PM, Borislav Petkov wrote: > > Also, I'd assume we need some of the current functionality to be able to > load ucode without rebooting the box. > Yes, the basic idea is that we'll keep the ucode around anyway so we can feed it to hotplug CPUs or S3 resume. If the ucode is updated from userspace we'd replace the in-memory copy and load it into the CPUs. -hpa -- 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/