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=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 5EEB4C433E2 for ; Fri, 17 Jul 2020 09:47:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A7A720734 for ; Fri, 17 Jul 2020 09:47:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594979255; bh=LtutLPHHz+H2LA9piAYXYQ4j73yhZ6KKKztxa2eqPaQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=jigek5AocoKjuHRue4f/Z33e4xDbyZfKoZ4EBVHbR/MBrqqVa51Rw4s2yAqbRUGoi Cv+iEMX5IcV+JT5+c0bIHEGGDylKAzWqj0TVlO4M9+rwEGPD5AOlJJqX8pURtbtgNE wTxYhEW2hnCa8iqsxujrGGH4VSyiTtiCaJTKf7zU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726013AbgGQJre (ORCPT ); Fri, 17 Jul 2020 05:47:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:54608 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725912AbgGQJre (ORCPT ); Fri, 17 Jul 2020 05:47:34 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6630F2070E; Fri, 17 Jul 2020 09:47:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594979254; bh=LtutLPHHz+H2LA9piAYXYQ4j73yhZ6KKKztxa2eqPaQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=q+NvGxUIE4LlM83AQdIaP3GnbmkazXeCohANXnX+GUQVbRDS4jSkKpje25qXB6lPt NvoNBn/oVt/zzDQXHj1eleTyFfWvSGeiPvUqRnzIan4LDXnMeMSuMQbe7JuoHorZRJ QzbtMqxGvCo/GG9xmR3HAo8opNgaqOVQYVjR4ZKo= Date: Fri, 17 Jul 2020 11:47:25 +0200 From: Greg KH To: Marc Zyngier Cc: stable@vger.kernel.org, arnd@arndb.de, sashal@kernel.org, naresh.kamboju@linaro.org, Mark Rutland , Will Deacon , Catalin Marinas , Daniel Lezcano , Vincenzo Frascino , Russell King , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-team@android.com Subject: Re: [Stable-5.4][PATCH 0/3] arm64: Allow the compat vdso to be disabled at runtime Message-ID: <20200717094725.GA2421196@kroah.com> References: <20200715125614.3240269-1-maz@kernel.org> <20200716115813.GB1668009@kroah.com> <20200717093357.GA2371446@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200717093357.GA2371446@kroah.com> Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Fri, Jul 17, 2020 at 11:33:57AM +0200, Greg KH wrote: > On Fri, Jul 17, 2020 at 09:02:06AM +0100, Marc Zyngier wrote: > > Hi Greg, > > > > On 2020-07-16 12:58, Greg KH wrote: > > > On Wed, Jul 15, 2020 at 01:56:11PM +0100, Marc Zyngier wrote: > > > > This is a backport of the series that recently went into 5.8. Note > > > > that the first patch is more a complete rewriting than a backport, as > > > > the vdso implementation in 5.4 doesn't have much in common with > > > > mainline. This affects the 32bit arch code in a benign way. > > > > > > > > It has seen very little testing, as I don't have the HW that triggers > > > > this issue. I have run it in VMs by faking the CPU MIDR, and nothing > > > > caught fire. Famous last words. > > > > > > These are also needed in 5.7.y, right? If so, I need that series before > > > I can take this one as we don't want people moving to a newer kernel and > > > suffer regressions :( > > > > The original mainline changes: > > > > 4b661d6133c5 arm64: arch_timer: Disable the compat vdso for cores affected > > by ARM64_WORKAROUND_1418040 > > c1fbec4ac0d7 arm64: arch_timer: Allow an workaround descriptor to disable > > compat vdso > > 97884ca8c292 arm64: Introduce a way to disable the 32bit vdso > > > > do apply cleanly to stable-5.7. Do you want me to resend them separately, > > or will you pick the patches directly from mainline? > > Hm, cherry-pick seems to work due to file renames, let me try this > again... Ok, my fault, these are already all in 5.7.9, sorry for the noise. I'll go queue these up now. greg "I need more coffee..." k-h