From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753000AbaIASs4 (ORCPT ); Mon, 1 Sep 2014 14:48:56 -0400 Received: from terminus.zytor.com ([198.137.202.10]:55963 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752914AbaIASsz (ORCPT ); Mon, 1 Sep 2014 14:48:55 -0400 User-Agent: K-9 Mail for Android In-Reply-To: <20140901174322.GA15533@khazad-dum.debian.net> References: <20140809231911.GA4843@khazad-dum.debian.net> <20140831194548.GA12628@khazad-dum.debian.net> <54037C07.8060703@zytor.com> <20140831201126.GB12628@khazad-dum.debian.net> <20140901051302.GA28402@nazgul.tnic> <5404A035.3070707@zytor.com> <20140901174322.GA15533@khazad-dum.debian.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: early microcode: how to disable at runtime? From: "H. Peter Anvin" Date: Mon, 01 Sep 2014 11:48:03 -0700 To: Henrique de Moraes Holschuh CC: Borislav Petkov , Fenghua Yu , linux-kernel@vger.kernel.org Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org No, it is worse to rename it and have older kernels behave differently. Kernel options are basically super obscure to most people anyway. On September 1, 2014 10:43:22 AM PDT, Henrique de Moraes Holschuh wrote: >On Mon, 01 Sep 2014, H. Peter Anvin wrote: >> On 08/31/2014 10:13 PM, Borislav Petkov wrote: >> > On Sun, Aug 31, 2014 at 05:11:26PM -0300, Henrique de Moraes >Holschuh wrote: >> >>> Probably more like something more like arch/x86/boot/cmdline.c. >Maybe >> >>> we could even make it sharable. >> >> >> >> Looks like that would work, yes. >> > >> > Guys, guys, please relax and check the code first: "dis_ucode_ldr". >> > >> >> Yeah. It is an absolutely horrific option name (something like >> "noearlyucode" would have been so much nicer; we generally use the >no- >> prefix and no underscores) but I should have objected to that one >much >> sooner. > >It wasn't properly documented, it is obscure as all heck, and early >microcode updates active by default is a very recent development on >distros. > >You cannot even find "dis_ucode_ldr" being cited by anyone through >google >searches. > >I believe it is actually possible to fix this still: either by directly >renaming, or by using a deprecation period and testing for a new name >and >the "dis_ucode_ldr" name. -- Sent from my mobile phone. Please pardon brevity and lack of formatting.