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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,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 93EBCC04AB6 for ; Tue, 28 May 2019 11:44:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7099B2070D for ; Tue, 28 May 2019 11:44:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726592AbfE1LoM (ORCPT ); Tue, 28 May 2019 07:44:12 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:55736 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726580AbfE1LoM (ORCPT ); Tue, 28 May 2019 07:44:12 -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 584FF341; Tue, 28 May 2019 04:44:12 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6B1733F59C; Tue, 28 May 2019 04:44:11 -0700 (PDT) Date: Tue, 28 May 2019 12:44:09 +0100 From: Will Deacon To: gregkh@linuxfoundation.org Cc: catalin.marinas@arm.com, marc.zyngier@arm.com, stable@vger.kernel.org Subject: Re: FAILED: patch "[PATCH] arm64: errata: Add workaround for Cortex-A76 erratum #1463225" failed to apply to 4.14-stable tree Message-ID: <20190528114409.GF20809@fuggles.cambridge.arm.com> References: <1558965280196247@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1558965280196247@kroah.com> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Mon, May 27, 2019 at 03:54:40PM +0200, gregkh@linuxfoundation.org wrote: > The patch below does not apply to the 4.14-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to . Urgh. I'm going to punt on this unless somebody requests a backport to a kernel prior to 4.19 explicitly. The issue is that our syscall entry code was moved to C after 4.14 and this workaround relies heavily on that work. A backport would therefore necessitate a rewrite of the workaround that hooks the assembly directly. Whilst do-able, I'd rather know that (a) somebody wants this (b) they plan to deploy it on real devices and (c) they can help to test. Sound reasonable? Will