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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 4DA3FC3A5A1 for ; Wed, 28 Aug 2019 10:24:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1DD552173E for ; Wed, 28 Aug 2019 10:24:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="dJOPjff/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726439AbfH1KYC (ORCPT ); Wed, 28 Aug 2019 06:24:02 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:35558 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726339AbfH1KYC (ORCPT ); Wed, 28 Aug 2019 06:24:02 -0400 Received: by mail-pf1-f194.google.com with SMTP id d85so1445530pfd.2 for ; Wed, 28 Aug 2019 03:24:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=zSFcplridhj7y02Ycdc0QCZBu/Jgfc6+2J1eLEdrC8U=; b=dJOPjff/iJGCBo/PjQjOwXMlyxp5nLDKFpJrw+KCeMIdQy013C7aUggWOC+/HJzc5i 2/JshmhyjqvLRSwJyMBMwjOon/e+jI0gdmX5AYtw1wysjz1/2uXRcQVVWcpyZNswZCbY YxzKDd9+MBjQ/k2YFTc4mSbc3Ybb1OxHkbLYVTA8VGdkCqdvdt2VS+S3VaWfgmuOn8aw 7XwYWlNY4FYKtQ4ibpKP7kyFGztCnqecRGVCqJcdMoFMgrMfEss+RkmLRwmMY77MoXwy azM+MaHKBHXJ8RGNmafhqRLc/zYHT8voOIMmZznjMzjZ1wThLPTCFP6VBYBFYjJAfiBa RW2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=zSFcplridhj7y02Ycdc0QCZBu/Jgfc6+2J1eLEdrC8U=; b=P78gzsHqSbAFRu4YtTMUPi5aKc9S8EWpH+5C7rWS/rx1fyyc9bR81pDvWOoIP92GMI /BTpWrzFrpr6b1aegfHjOLbb+9pm2+m23RFfwth1n0PFZmp2HuGejqClbNJMRhwfbxDw mVV6s65LzSz/RD4i/g47z3+y4EyGXjwcX7CWyM7adTRlC34GRkvOjmU3gYL7AwEUtHdy 5dU/KNUf6Y4fkRTaypyelNjXbyDq8dXSIHdV9nTnTWz+Fn1JPEmPS3H6a0M/wycrVEU6 eAOpf5bKZytwrr32CI/dScg5ynAjQLcUcYu2lrqVFvX24wSGnEo6L7uykK3VWlIRAE0D GWGA== X-Gm-Message-State: APjAAAW08rpGq55iIpapiqkQgiQLYjqEWEVht39cYXnLibooSEAnVsPr T7nxQtFwH+sfoaMkrUYzkcf+eA== X-Google-Smtp-Source: APXvYqxxjScNWNqUf4XJIY8BRc5y0WHCZv7XV1cQaiSqTGH7clqNM6xU6KCYvNjD2avSjsBnU1e1HQ== X-Received: by 2002:a65:41c2:: with SMTP id b2mr2804787pgq.320.1566987841270; Wed, 28 Aug 2019 03:24:01 -0700 (PDT) Received: from localhost ([122.167.132.221]) by smtp.gmail.com with ESMTPSA id e185sm3129030pfa.119.2019.08.28.03.23.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Aug 2019 03:23:58 -0700 (PDT) Date: Wed, 28 Aug 2019 15:53:56 +0530 From: Viresh Kumar To: Mark Rutland Cc: stable@vger.kernel.org, Julien Thierry , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Marc Zyngier , Will Deacon , Russell King , Vincent Guittot , mark.brown@arm.com Subject: Re: [PATCH v4.4 V2 24/43] arm64: Add skeleton to harden the branch predictor against aliasing attacks Message-ID: <20190828102356.tlhgi3riue3bl5p4@vireshk-i7> References: <4349161f0ed572bbc6bff64bad94aa96d07b27ff.1562908075.git.viresh.kumar@linaro.org> <20190731164556.GI39768@lakrids.cambridge.arm.com> <20190801052011.2hrei36v4zntyfn5@vireshk-i7> <20190806121816.GD475@lakrids.cambridge.arm.com> <20190808120600.qhbhopvp4e5w33at@vireshk-i7> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190808120600.qhbhopvp4e5w33at@vireshk-i7> User-Agent: NeoMutt/20180716-391-311a52 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 08-08-19, 17:36, Viresh Kumar wrote: > On 06-08-19, 13:18, Mark Rutland wrote: > > Upstream and in v4.9, the meltdown patches came before the spectre > > patches, and doing this in the opposite order causes context problems > > like the above. > > > > Given that, I think it would be less surprising to do the meltdown > > backport first, though I apprecaite that's more work to get these > > patches in. :/ > > I attempted meltdown backport in the last two days and the amount of > extra patches to be backported is enormous. And I am not sure if > everything is alright as well now, and things will greatly rely on > reviews from you for it. > > For this series, what about just backporting for now to account for > CSV3 ? And attempting meltdown backport separately later ? > > 179a56f6f9fb arm64: Take into account ID_AA64PFR0_EL1.CSV3 @Mark ? -- viresh