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=-5.2 required=3.0 tests=BAYES_00, 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 B8C2AC433E7 for ; Mon, 12 Oct 2020 14:41:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DBD12072D for ; Mon, 12 Oct 2020 14:41:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389031AbgJLOlL (ORCPT ); Mon, 12 Oct 2020 10:41:11 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:43375 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387930AbgJLOlL (ORCPT ); Mon, 12 Oct 2020 10:41:11 -0400 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 09CEeeKE011622; Mon, 12 Oct 2020 16:40:40 +0200 Date: Mon, 12 Oct 2020 16:40:40 +0200 From: Willy Tarreau To: Borislav Petkov Cc: Guillaume Tucker , Enric Balletbo i Serra , Randy Dunlap , linux-kernel@vger.kernel.org, x86@kernel.org, Collabora Kernel ML , Thomas Gleixner , Ingo Molnar , Diego Elio =?iso-8859-1?Q?Petten=F2?= , "H. Peter Anvin" , "Martin K. Petersen" , Nathan Chancellor , kernelci@groups.io Subject: Re: [PATCH] x86/x86_64_defconfig: Enable the serial console Message-ID: <20201012144040.GB11614@1wt.eu> References: <20201008164044.GE5505@zn.tnic> <4162cfa4-7bf2-3e6e-1b8c-e19187e6fa10@infradead.org> <2538da14-0f4b-5d4a-c7bf-6fdb46ba2796@collabora.com> <20201011122020.GA15925@zn.tnic> <107a6fb0-a667-2f30-d1f4-640e3fee193a@collabora.com> <20201011155754.GC15925@zn.tnic> <1dfdf163-9b54-ceae-b178-c566e6109263@collabora.com> <20201012035846.GB11282@1wt.eu> <20201012143212.GC22829@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201012143212.GC22829@zn.tnic> User-Agent: Mutt/1.6.1 (2016-04-27) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 12, 2020 at 04:32:12PM +0200, Borislav Petkov wrote: > On Mon, Oct 12, 2020 at 11:22:10AM +0100, Guillaume Tucker wrote: > > However, it was found while adding some x86 Chromebooks[1] to > > KernelCI that x86_64_defconfig lacked some basic things for > > anyone to be able to boot a kernel with a serial console enabled > > on those. > > Hold on, those are laptops, right? How come they do have serial console? > Because laptops don't have serial console - that has been the eternal > problem with debugging kernels on laptops. Well, to be precise, they don't have *anymore*. I used to exclusively select laptops having a serial port given that I was using it daily with routers, until I had to resign when I abandonned my good old NC8000 :-/ Willy