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=-2.2 required=3.0 tests=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 62BA1C31E49 for ; Wed, 19 Jun 2019 12:24:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 423AA2147A for ; Wed, 19 Jun 2019 12:24:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727244AbfFSMYo (ORCPT ); Wed, 19 Jun 2019 08:24:44 -0400 Received: from foss.arm.com ([217.140.110.172]:36994 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727134AbfFSMYo (ORCPT ); Wed, 19 Jun 2019 08:24:44 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2E0A6360; Wed, 19 Jun 2019 05:24:44 -0700 (PDT) Received: from e107155-lin (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E8A6A3F738; Wed, 19 Jun 2019 05:24:42 -0700 (PDT) Date: Wed, 19 Jun 2019 13:24:34 +0100 From: Sudeep Holla To: Ard Biesheuvel Cc: linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, lee.jones@linaro.org, leif.lindholm@linaro.org, Sudeep Holla Subject: Re: [RFC PATCH] acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 Message-ID: <20190619122434.GA25656@e107155-lin> References: <20190619121831.7614-1-ard.biesheuvel@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190619121831.7614-1-ard.biesheuvel@linaro.org> 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, 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 -- Regards, Sudeep