Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932362AbeAHLzL (ORCPT + 1 other); Mon, 8 Jan 2018 06:55:11 -0500 Received: from www.llwyncelyn.cymru ([82.70.14.225]:32966 "EHLO fuzix.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757034AbeAHLzA (ORCPT ); Mon, 8 Jan 2018 06:55:00 -0500 Date: Mon, 8 Jan 2018 11:54:54 +0000 From: Alan Cox To: Alexey Dobriyan Cc: Konrad Rzeszutek Wilk , tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [patch V2 1/2] sysfs/cpu: Add vulnerability folder Message-ID: <20180108115454.576dc6ce@alans-desktop> In-Reply-To: <20180108053514.GA2408@avx2> References: <20180107222204.GA28038@avx2> <20180108035056.GA6599@localhost.localdomain> <20180108053514.GA2408@avx2> Organization: Intel Corporation X-Mailer: Claws Mail 3.15.1-dirty (GTK+ 2.24.31; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Mon, 8 Jan 2018 08:35:14 +0300 Alexey Dobriyan wrote: > On Sun, Jan 07, 2018 at 10:50:58PM -0500, Konrad Rzeszutek Wilk wrote: > > On Mon, Jan 08, 2018 at 01:22:04AM +0300, Alexey Dobriyan wrote: > > > Thomas Gleixner wrote: > > > > Create /sys/devices/system/cpu/vulnerabilities folder and files for > > > > meltdown, spectre_v1 and spectre_v2. > > > > > > It is called "grep -e '^bugs' /proc/cpuinfo". > > > > > > kpti is deduceable from .config and /proc/cmdline . > > > If people don't know what .config they are running, god bless them. > > > > It is not just for meltdown (kpti). You also have retpoline and IBRS > > which is for spectre. > > If you, as kernel developer, are sure that bug is properly mitigated > to the best of your knowledge then clear the bit from the bug mask. It's probably useful to have the mitigation status somewhere because that is what most people will care about. Both pieces of information are needed though. Alan