From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C111C3A59F for ; Mon, 26 Aug 2019 20:23:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28A3F2186A for ; Mon, 26 Aug 2019 20:23:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387847AbfHZUXk (ORCPT ); Mon, 26 Aug 2019 16:23:40 -0400 Received: from mga11.intel.com ([192.55.52.93]:37954 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728711AbfHZUXk (ORCPT ); Mon, 26 Aug 2019 16:23:40 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Aug 2019 13:23:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,433,1559545200"; d="scan'208";a="187703911" Received: from otc-nc-03.jf.intel.com (HELO otc-nc-03) ([10.54.39.145]) by FMSMGA003.fm.intel.com with ESMTP; 26 Aug 2019 13:23:39 -0700 Date: Mon, 26 Aug 2019 13:23:39 -0700 From: "Raj, Ashok" To: Borislav Petkov Cc: Mihai Carabas , linux-kernel@vger.kernel.org, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, patrick.colp@oracle.com, kanth.ghatraju@oracle.com, Jon.Grimm@amd.com, Thomas.Lendacky@amd.com, Ashok Raj Subject: Re: [PATCH 1/2] x86/microcode: Update late microcode in parallel Message-ID: <20190826202339.GA49895@otc-nc-03> References: <1566506627-16536-1-git-send-email-mihai.carabas@oracle.com> <1566506627-16536-2-git-send-email-mihai.carabas@oracle.com> <20190824085156.GA16813@zn.tnic> <20190824085300.GB16813@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190824085300.GB16813@zn.tnic> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Boris Minor nit: Small commit log fixup below. On Sat, Aug 24, 2019 at 10:53:00AM +0200, Borislav Petkov wrote: > From: Ashok Raj > Date: Thu, 22 Aug 2019 23:43:47 +0300 > > Microcode update was changed to be serialized due to restrictions after > Spectre days. Updating serially on a large multi-socket system can be > painful since it is being done on one CPU at a time. > > Cloud customers have expressed discontent as services disappear for a > prolonged time. The restriction is that only one core goes through the s/one core/one thread of a core/ > update while other cores are quiesced. s/cores/other thread(s) of the core > > Do the microcode update only on the first thread of each core while > other siblings simply wait for this to complete. > > [ bp: Simplify, massage, cleanup comments. ] > Cheers, Ashok