Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933122AbeAKOGW (ORCPT + 1 other); Thu, 11 Jan 2018 09:06:22 -0500 Received: from mail-pf0-f193.google.com ([209.85.192.193]:40328 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751607AbeAKOGU (ORCPT ); Thu, 11 Jan 2018 09:06:20 -0500 X-Google-Smtp-Source: ACJfBouVu692wqvESPk86uTC2nc9WzMIfT4RdlzqEBsMhjKDohigUT/yh/ofQcIz5wdPinQXsWoObA== Subject: Re: Linux 4.15-rc7 To: Olivier Galibert , Pavel Machek Cc: Linus Torvalds , Linux Kernel Mailing List , jikos@suse.cz References: <20180110233252.GA14739@amd> From: Nikolay Borisov Message-ID: <9d4136d3-48b1-4187-c657-f5d7c8e80bb0@gmail.com> Date: Thu, 11 Jan 2018 16:06:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On 11.01.2018 13:29, Olivier Galibert wrote: > Wasn't/Isn't the 4G/4G memory layout for 32 bits essentially KPTI? 4g/4g was never accepted upstream > > OG. > > > On Thu, Jan 11, 2018 at 12:32 AM, Pavel Machek wrote: >> Hi! >> >>> The one thing I want to do now that Meltdown and Spectre are public, >>> is to give a *big* shout-out to the x86 people, and Thomas Gleixner in >>> particular for really being on top of this. It's been one huge >>> annoyance, and honestly, Thomas really went over and beyond in this >>> whole mess. A lot of other people have obviously been involved too, >> >> As I understand it: KPTI prevents Meltdown attack on x86-64, but >> Spectre means even x86-64 is not expected to be safe? >> >> Ok, so Meltdown is public... And I still have some nice 32-bit >> machines I'd like to keep working. >> >> Proof of concept is out, https://github.com/IAIK/meltdown/ . >> >> Is anyone working on KPTI for x86-32? SLES11 should still be >> supported, and that should have x86-32 version; any chance SUSE can >> share some patches? >> >> Thanks, >> Pavel >> -- >> (english) http://www.livejournal.com/~pavelmachek >> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html