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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 DC783C43613 for ; Thu, 20 Jun 2019 12:25:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADD6C206E0 for ; Thu, 20 Jun 2019 12:25:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="CoPiD8NX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726592AbfFTMZ4 (ORCPT ); Thu, 20 Jun 2019 08:25:56 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:37475 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726492AbfFTMZ4 (ORCPT ); Thu, 20 Jun 2019 08:25:56 -0400 Received: by mail-wm1-f67.google.com with SMTP id f17so2970698wme.2 for ; Thu, 20 Jun 2019 05:25:54 -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:content-transfer-encoding:in-reply-to :user-agent; bh=nGbwT1fOo/WcjbkFQ3vvfod2lQownHb8jwDrl6e2Yzk=; b=CoPiD8NXuY79eSws3YaYvFv5PqRMRItqh+Yea5nAQAhZwlCElCUngtM6Yt5DY0rkf1 oYiIsFQ5dFh1bKoP9oWtH3jQeEq9nzihwUW7FxVj9/D84o1ZYLTEeNk44akVaNP4ZPof XIdOkl+JLPTNaMVtUCV+PYg0sDn8YE2Ok4ag/ZI4UVLZ4+IFcc1FbH+2BZP147R9UUqB 36p40GNpJbb0T9UOPjamUUuvHoCeM0jsuwUz2C7Rh4/P2GzyvUD+Yt+3QG9Nm5Tx7vqx T4YWi58KKkGszAsVYNp8XLrfW/9JUVLK+gHQnf8UB32GOJqblFrDZXuu2uN6p6xwY6GY SEqg== 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:content-transfer-encoding :in-reply-to:user-agent; bh=nGbwT1fOo/WcjbkFQ3vvfod2lQownHb8jwDrl6e2Yzk=; b=irDk5bUCB3ueXZIFZmXi/8oGuiMlXx226X1Y6DHI1uA/sksZrYjWBB/CY+491t/wm4 TQvoxa/HmAokUBzSxH93Wi+5CpV+SEG1lqfakAgcwJ2AikYjDGSy3VFcvyNtm41wGeE9 +2utbm44eGcS9zQjEXNwwG1vHPvuz4JnBA2SWrCG4MY0Qfr07W7RiVEPW0h1QUoHhXxU we5wU9I42Ae5K1thlal2VFqMnHOeg/ZZJfb+Bx2SmefNBBYUeqnJ/iKY9VqHHXIK0N5t IopBrQJ6J2C5EgnPDlGJp33pHeiaI0T9vLR6ZxHNuwF+lhNqcLA1tEge9q8O7OVruCVp 15eA== X-Gm-Message-State: APjAAAXdTtloqsJMLKYPly6jiv/kixKjTNCZ9bJOsoAnwRvKbK5wR1cP 32VtkKWfxMWd/f7LFUZiVSkN4A== X-Google-Smtp-Source: APXvYqz6jnLBVywer3zqPeTDaiXVrGtBx8wKm76F0MgDMf6oUh3M5VIM8YxAxe12Bk0fOIKqMpgUlA== X-Received: by 2002:a1c:a842:: with SMTP id r63mr2705755wme.117.1561033553765; Thu, 20 Jun 2019 05:25:53 -0700 (PDT) Received: from dell ([2.27.35.243]) by smtp.gmail.com with ESMTPSA id p26sm21241456wrp.58.2019.06.20.05.25.52 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 20 Jun 2019 05:25:53 -0700 (PDT) Date: Thu, 20 Jun 2019 13:25:51 +0100 From: Lee Jones To: Lorenzo Pieralisi Cc: Sudeep Holla , Ard Biesheuvel , linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, leif.lindholm@linaro.org Subject: Re: [RFC PATCH] acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 Message-ID: <20190620122551.GC4699@dell> References: <20190619121831.7614-1-ard.biesheuvel@linaro.org> <20190619122434.GA25656@e107155-lin> <20190620075732.GB4699@dell> <20190620094937.GB20872@e121166-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190620094937.GB20872@e121166-lin.cambridge.arm.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Thu, 20 Jun 2019, Lorenzo Pieralisi wrote: > On Thu, Jun 20, 2019 at 08:57:32AM +0100, Lee Jones wrote: > > On Wed, 19 Jun 2019, Sudeep Holla wrote: > > > > > On Wed, Jun 19, 2019 at 02:18:31PM +0200, Ard Biesheuvel wrote: > > > > Some Qualcomm Snapdragon based laptops built to run Microsoft Windows > > > > are clearly ACPI 5.1 based, given that that is the first ACPI revision > > > > that supports ARM, and introduced the FADT 'arm_boot_flags' field, > > > > which has a non-zero field on those systems. > > > > > > > > So in these cases, infer from the ARM boot flags that the FADT must be > > > > 5.1 or later, and treat it as 5.1. > > > > > > > > > > Makes sense and looks simple to me. > > > > > > Acked-by: Sudeep Holla > > > > Could we pleeeeease have this in for v5.3? > > > > We have available, consumer-level platforms that rely on this change. > > But we do not have the kernel infrastructure to support them so > I am fine with it but urgency is questionable as far as I am > concerned. Yes we do. At least, we will in v5.3. -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog