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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 A5A2CC43331 for ; Fri, 6 Sep 2019 07:47:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C66E20640 for ; Fri, 6 Sep 2019 07:47:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="j0z+LE85" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732698AbfIFHrD (ORCPT ); Fri, 6 Sep 2019 03:47:03 -0400 Received: from mail.skyhub.de ([5.9.137.197]:58030 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732133AbfIFHrD (ORCPT ); Fri, 6 Sep 2019 03:47:03 -0400 Received: from zn.tnic (p200300EC2F0B9E00D81CE8CF22720A06.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:9e00:d81c:e8cf:2272:a06]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 795EF1EC09A0; Fri, 6 Sep 2019 09:47:01 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1567756021; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=kXsLjA6zXd8DcBcKRp3q4a5MOpKDcX1Fi7lO4aq/nhE=; b=j0z+LE85Kw78wgdn2dfqwfaa54eNdfaZx+dGoRSPLw2tZr8it+39Pvu3zM1x5BS6kz6lri E5PUQ/NycDIIgtbycLF3j6e4qKew4SoF98dWP9smHpFFvG2tkNzSV/8KRjhwnRuaIl6PQM i/4182e8DcEJ50NwtLYvxd6725+iPYE= Date: Fri, 6 Sep 2019 09:46:55 +0200 From: Borislav Petkov To: "Raj, Ashok" Cc: Thomas Gleixner , Boris Ostrovsky , Mihai Carabas , "H. Peter Anvin" , Ingo Molnar , Jon Grimm , kanth.ghatraju@oracle.com, konrad.wilk@oracle.com, patrick.colp@oracle.com, Tom Lendacky , x86-ml , linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/microcode: Add an option to reload microcode even if revision is unchanged Message-ID: <20190906074655.GA19008@zn.tnic> References: <20190829060942.GA1312@zn.tnic> <20190829130213.GA23510@araj-mobl1.jf.intel.com> <20190903164630.GF11641@zn.tnic> <41cee473-321c-2758-032a-ccf0f01359dc@oracle.com> <20190905002132.GA26568@otc-nc-03> <20190905072029.GB19246@zn.tnic> <20190905194044.GA3663@otc-nc-03> <20190905222706.GA4422@otc-nc-03> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190905222706.GA4422@otc-nc-03> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 05, 2019 at 03:27:06PM -0700, Raj, Ashok wrote: > Several customers have asked this to check the safety of late loads. > They want to validate in production setup prior to rolling late-load > to all production systems. First of all, they should use *early* loading. I don't know how many times I need to say that, maybe I should print it on T-shirts. And then they can reboot. If you're thinking of the "we-can't-reboot-because-we're-cloud" argument don't even bother to bring it - I've had it more than enough and no, just because cloud people don't want to reboot, it doesn't mean we will support some insane use case. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette