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=-5.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 92F22C3A5A1 for ; Wed, 21 Aug 2019 16:36:02 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 660692332A for ; Wed, 21 Aug 2019 16:36:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="THQSoGVc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 660692332A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 3ECE4BBC; Wed, 21 Aug 2019 16:36:02 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 917A4B9E for ; Wed, 21 Aug 2019 16:36:01 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 383768A6 for ; Wed, 21 Aug 2019 16:36:00 +0000 (UTC) Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E3D2D216F4; Wed, 21 Aug 2019 16:35:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566405360; bh=523UKRpEYgVnK4n6qoJT/UA2T1eyXvRGlZiSMko8S2I=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=THQSoGVckn9loJO2YK6n0hW8Zr+qYViNc6L7hieM8yM6BUPTRpUCVjjlXy5iJ/abQ /8sxz9km+kjRuL5G/1sDfv+VWpOPpsABw8SxC1NN+XfRv9hH04pSbCObu9foGya4yP 3u+NJzArrkquuRd6l3iLVqK/x7qHKusaX9b/v5io= Date: Wed, 21 Aug 2019 17:35:54 +0100 From: Will Deacon To: Robin Murphy Subject: Re: [PATCH v10 09/23] iommu/io-pgtable-arm-v7s: Extend to support PA[33:32] for MediaTek Message-ID: <20190821163553.ymlk5fcgd6ntnpss@willie-the-truck> References: <1566395606-7975-1-git-send-email-yong.wu@mediatek.com> <1566395606-7975-10-git-send-email-yong.wu@mediatek.com> <20190821152448.qmoqjh5zznfpdi6n@willie-the-truck> <22a79977-5074-7af1-97b8-8a3e549b23c1@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <22a79977-5074-7af1-97b8-8a3e549b23c1@arm.com> User-Agent: NeoMutt/20170113 (1.7.2) Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , cui.zhang@mediatek.com, srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, Rob Herring , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger , ming-fan.chen@mediatek.com, anan.sun@mediatek.com, Matthias Kaehlcke X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org On Wed, Aug 21, 2019 at 04:34:27PM +0100, Robin Murphy wrote: > On 21/08/2019 16:24, Will Deacon wrote: > > On Wed, Aug 21, 2019 at 09:53:12PM +0800, Yong Wu wrote: > > > MediaTek extend the arm v7s descriptor to support up to 34 bits PA where > > > the bit32 and bit33 are encoded in the bit9 and bit4 of the PTE > > > respectively. Meanwhile the iova still is 32bits. > > > > > > Regarding whether the pagetable address could be over 4GB, the mt8183 > > > support it while the previous mt8173 don't, thus keep it as is. > > > > > > Signed-off-by: Yong Wu > > > --- > > > drivers/iommu/io-pgtable-arm-v7s.c | 32 +++++++++++++++++++++++++------- > > > include/linux/io-pgtable.h | 7 +++---- > > > 2 files changed, 28 insertions(+), 11 deletions(-) > > > > [...] > > > > > @@ -731,7 +747,9 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, > > > { > > > struct arm_v7s_io_pgtable *data; > > > - if (cfg->ias > ARM_V7S_ADDR_BITS || cfg->oas > ARM_V7S_ADDR_BITS) > > > + if (cfg->ias > ARM_V7S_ADDR_BITS || > > > + (cfg->oas > ARM_V7S_ADDR_BITS && > > > + !(cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_EXT))) > > > > Please can you instead change arm_v7s_alloc_pgtable() so that it allows an > > ias of up to 34 when the IO_PGTABLE_QUIRK_ARM_MTK_EXT is set? > > You mean oas, right? I believe the hardware *does* actually support a 32-bit > ias as well, but we shouldn't pretend to support that while > __arm_v7s_alloc_table() still only knows how to allocate normal-sized > tables. Sorry, yes, oas. Will _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu