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=-8.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 29769C43461 for ; Fri, 4 Sep 2020 09:43:59 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 D1FD0205CB for ; Fri, 4 Sep 2020 09:43:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="FaUN5Ozv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D1FD0205CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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=FG0jkwtt48/PBxlRkxc2j9pRklLFklxF/UC086/YLUM=; b=FaUN5OzvGk2NZt3Qc2OPvDiIp ie4sq8jdh6Dmsh2S+8VlFDk90n14zC3ZmBW2IOUpzwWuLzPQR02U61GwtZW5xR6vMZhzzpt1IPDrT 1R9K4rjyBAeZbFCIWfvcNaweGJ/m/JwU1uuJRp32RYCoh0MSAoF6NOkAbEvLBus30LeKqP04VjaQB ARhL11AuYo+YTrWb1wVsEBM+I96dbYxW7GNi4aRPbE0bAG2GYWUIrL7nIwFh6Fqi/U/Adn7IYftOE yX66h8i0ox/FE52s0J1D57j1ZI9k0IwPsqqzVh02Due8ns3NxcmVEKNUSiCC+2mPRrfEiR+zeXK3Y CA9foAGhQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE8Ex-0003sg-JB; Fri, 04 Sep 2020 09:42:39 +0000 Received: from 8bytes.org ([81.169.241.247] helo=theia.8bytes.org) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kE8Ev-0003s4-Pi; Fri, 04 Sep 2020 09:42:38 +0000 Received: by theia.8bytes.org (Postfix, from userid 1000) id CD0339CE; Fri, 4 Sep 2020 11:42:34 +0200 (CEST) Date: Fri, 4 Sep 2020 11:42:33 +0200 From: Joerg Roedel To: Miles Chen Subject: Re: [PATCH v5] iommu/mediatek: check 4GB mode by reading infracfg Message-ID: <20200904094233.GP6714@8bytes.org> References: <20200831105639.2856-1-miles.chen@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200831105639.2856-1-miles.chen@mediatek.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200904_054237_950936_C213337E X-CRM114-Status: GOOD ( 15.36 ) 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: Rob Herring , wsd_upstream@mediatek.com, David Hildenbrand , linux-kernel@vger.kernel.org, Mike Rapoport , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, Yong Wu , Matthias Brugger , Yingjoe Chen , Christoph Hellwig , 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Aug 31, 2020 at 06:56:39PM +0800, Miles Chen wrote: > In previous discussion [1] and [2], we found that it is risky to > use max_pfn or totalram_pages to tell if 4GB mode is enabled. > > Check 4GB mode by reading infracfg register, remove the usage > of the un-exported symbol max_pfn. > > This is a step towards building mtk_iommu as a kernel module. > > [1] https://lore.kernel.org/lkml/20200603161132.2441-1-miles.chen@mediatek.com/ > [2] https://lore.kernel.org/lkml/20200604080120.2628-1-miles.chen@mediatek.com/ > [3] https://lore.kernel.org/lkml/20200715205120.GA778876@bogus/ > > Cc: Mike Rapoport > Cc: David Hildenbrand > Cc: Yong Wu > Cc: Yingjoe Chen > Cc: Christoph Hellwig > Cc: Rob Herring > Cc: Matthias Brugger > Signed-off-by: Miles Chen You forgot to add the tags here from v4, at least Matthias' Reviewed-by is missing. Please add the missing tags and resend. Joerg _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel