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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 DC16AC10F13 for ; Tue, 16 Apr 2019 21:39:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A608C20684 for ; Tue, 16 Apr 2019 21:39:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730419AbfDPVjc (ORCPT ); Tue, 16 Apr 2019 17:39:32 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:35292 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726986AbfDPVjb (ORCPT ); Tue, 16 Apr 2019 17:39:31 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C98EE15A2; Tue, 16 Apr 2019 14:39:30 -0700 (PDT) Received: from brain-police (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6781C3F59C; Tue, 16 Apr 2019 14:39:24 -0700 (PDT) Date: Tue, 16 Apr 2019 22:39:21 +0100 From: Will Deacon To: Thomas Gleixner Cc: Josh Poimboeuf , linux-kernel@vger.kernel.org, x86@kernel.org, Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Jiri Kosina , Waiman Long , Andrea Arcangeli , Jon Masters , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Martin Schwidefsky , Heiko Carstens , linux-s390@vger.kernel.org, Catalin Marinas , linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, Greg Kroah-Hartman , Tyler Hicks , Linus Torvalds , Randy Dunlap , Steven Price , Phil Auld Subject: Re: [PATCH v2 5/5] arm64/speculation: Support 'mitigations=' cmdline option Message-ID: <20190416213920.GC11724@brain-police> References: <24039e1370ed57e8075730c0b88c505afd9e0ab7.1555085500.git.jpoimboe@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 16, 2019 at 09:26:13PM +0200, Thomas Gleixner wrote: > On Fri, 12 Apr 2019, Josh Poimboeuf wrote: > > > Configure arm64 runtime CPU speculation bug mitigations in accordance > > with the 'mitigations=' cmdline option. This affects Meltdown, Spectre > > v2, and Speculative Store Bypass. > > > > The default behavior is unchanged. > > > > Signed-off-by: Josh Poimboeuf > > --- > > NOTE: This is based on top of Jeremy Linton's patches: > > https://lkml.kernel.org/r/20190410231237.52506-1-jeremy.linton@arm.com > > So I keep that out and we have to revisit that once the ARM64 stuff hits a > tree, right? I can have a branch with just the 4 first patches applied > which ARM64 folks can pull in when they apply Jeremy's patches before te > merge window. Yes, that would work for us, cheers. I should get to Jeremy's latest version next week and I'm certainly planning to get them queued up for 5.2. Will