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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 3C374C43613 for ; Thu, 20 Jun 2019 09:49:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1289F2083B for ; Thu, 20 Jun 2019 09:49:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fxz8cV0v" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1289F2083B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3bquk8NlKvZKD1HLkdfUW+CAxmDOyr7hABtQ/bjvIwg=; b=fxz8cV0vrH9Rx2 JXelRMdOGT5KY4jO/3I4XivOAQEUiqKqNway8SoFFv1GCX1NbMv3IzroY9vfjcn2xttMIE9fZmIdI bfy3ruz06yGk3t4QxZGTKd3LffQf6XgosFHEUdBnPOQ3/OLT2HvoDmLl3hUL07vA22n8aUVDWoW9q dTeJRB1whXmd8ySDiUbpZ3jpVkbd937/FulTr1ZlU7rxaDEp4QxLT4Ra80DH2+nzQ8PucraFmOQwy BIH3x0b+qg9P+Eum1WV97/xA/K6knsZGY3ouTcwpIPHcqGg49h8e5oxiwp2120v9dluqsfbwuVQgR N4FdWsk/tMOaIbgQXvOQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdthR-0006lt-1S; Thu, 20 Jun 2019 09:49:45 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdthN-0006lP-SZ for linux-arm-kernel@lists.infradead.org; Thu, 20 Jun 2019 09:49:43 +0000 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 151F5360; Thu, 20 Jun 2019 02:49:41 -0700 (PDT) Received: from e121166-lin.cambridge.arm.com (unknown [10.1.196.255]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EAA403F246; Thu, 20 Jun 2019 02:49:39 -0700 (PDT) Date: Thu, 20 Jun 2019 10:49:37 +0100 From: Lorenzo Pieralisi To: Lee Jones Subject: Re: [RFC PATCH] acpi/arm64: ignore 5.1 FADTs that are reported as 5.0 Message-ID: <20190620094937.GB20872@e121166-lin.cambridge.arm.com> References: <20190619121831.7614-1-ard.biesheuvel@linaro.org> <20190619122434.GA25656@e107155-lin> <20190620075732.GB4699@dell> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190620075732.GB4699@dell> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190620_024941_970078_45CD0BFF X-CRM114-Status: GOOD ( 14.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ard Biesheuvel , catalin.marinas@arm.com, will.deacon@arm.com, leif.lindholm@linaro.org, linux-acpi@vger.kernel.org, Sudeep Holla , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. Lorenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel