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 4F0F5C43613 for ; Thu, 20 Jun 2019 07:57:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 23A75208CB for ; Thu, 20 Jun 2019 07:57:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Xbqowj37" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725953AbfFTH5g (ORCPT ); Thu, 20 Jun 2019 03:57:36 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:33253 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725877AbfFTH5g (ORCPT ); Thu, 20 Jun 2019 03:57:36 -0400 Received: by mail-wm1-f65.google.com with SMTP id h19so6306794wme.0 for ; Thu, 20 Jun 2019 00:57:35 -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=YQGObdl7kH+wEvSqxa3FaWAQlmAcdn2aMFRJreWKZJ0=; b=Xbqowj37eqV+b9k1NLVHC7JwZDta/+JDzrrS82yOXNGCstfgYJjW6mwRqSqrUWlS3L 1/8SQNYcmzWvXsmCzetHTO6JlLdz3Id/uddvH1551kLp+ptg+bQ1j50ILkH28rrlU0ZU jmN/HIDMQsfJr48uD3R5FYWLPdRDLx9CEWMcCc0/fjCBi2EPF1aVLt5OwzxKvYAXNuJX KshcHWrLBBHaXj/vr4PvVEkwDWNuzZB/F+QSnwDu5Is0r+N94SG1NiPuv7MwEILYddxF 78pmCuwckrZVmiiLLofI6l1GLKG8ruskdYQAGYTcG4DGJrf2tEkVmS2jzMcclNRLJsVm oSKw== 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=YQGObdl7kH+wEvSqxa3FaWAQlmAcdn2aMFRJreWKZJ0=; b=rA/5YyvLbYHU/+Z+Hh63iNdWuigwo53UW99g62S2gqv4QoFAH2Hp6qmWb8yX8qe/Uh gWm4hMtBtsBFISL9Ey/fuakTCDxyquyZ6qNUs+9ASXXbTGWQlfWu3EHsxzMSf5mcoXz6 FYHyYQAfbBHHcqGhRTB+b7cVT4TFwugBRxoMcURgMBsCtmzVdEuSNJxwNoZuNLiMu/79 i7ysRWziEIvX+nLE75gm2e8LWWMpZ9DFLf0/GwvEbcA/zna4SZO4RvU5qtbRcblFUrqB qGAx0kfxUg4AqqrEK+Ie+opP7RuRa6qNtUDhlTDn/NaxxTFrhkgppVReDPBE4m0unB1O BBaQ== X-Gm-Message-State: APjAAAWE5IiNrQ+M85Z9aoBeszs6Ug94tFJqBKGchvGe2dB6zjmAeCRH H6jnc+GWhaUpd+vlD7TC421tgg== X-Google-Smtp-Source: APXvYqyVIG+SggD0Ywg3p6wX7nREHzj8RkzQTZNsXYDvoszka9op+STK5gM62OIDMaI2Pdh9fGFtxw== X-Received: by 2002:a1c:cf0b:: with SMTP id f11mr1671215wmg.138.1561017454297; Thu, 20 Jun 2019 00:57:34 -0700 (PDT) Received: from dell ([2.27.35.243]) by smtp.gmail.com with ESMTPSA id x8sm3646616wmc.5.2019.06.20.00.57.33 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 20 Jun 2019 00:57:33 -0700 (PDT) Date: Thu, 20 Jun 2019 08:57:32 +0100 From: Lee Jones To: Sudeep Holla Cc: Ard Biesheuvel , linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, leif.lindholm@linaro.org Subject: Re: [RFC PATCH] acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 Message-ID: <20190620075732.GB4699@dell> References: <20190619121831.7614-1-ard.biesheuvel@linaro.org> <20190619122434.GA25656@e107155-lin> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190619122434.GA25656@e107155-lin> 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 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. -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog