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 Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EFEADC433EF for ; Tue, 30 Nov 2021 21:57:07 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 7CE9282786; Tue, 30 Nov 2021 21:57:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sDPrJZSatbyw; Tue, 30 Nov 2021 21:57:06 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTPS id 6E2D782897; Tue, 30 Nov 2021 21:57:06 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3BEDEC001C; Tue, 30 Nov 2021 21:57:06 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 879E6C000A for ; Tue, 30 Nov 2021 21:02:47 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 6A31560768 for ; Tue, 30 Nov 2021 21:02:47 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TQWA9LivF0EL for ; Tue, 30 Nov 2021 21:02:46 +0000 (UTC) X-Greylist: delayed 00:06:13 by SQLgrey-1.8.0 Received: from soltyk.jannau.net (soltyk.jannau.net [144.76.91.90]) by smtp3.osuosl.org (Postfix) with ESMTPS id 3C1CA60757 for ; Tue, 30 Nov 2021 21:02:46 +0000 (UTC) Received: by soltyk.jannau.net (Postfix, from userid 1000) id 6F085261BA6; Tue, 30 Nov 2021 21:56:31 +0100 (CET) Date: Tue, 30 Nov 2021 21:56:31 +0100 From: Janne Grunau To: Sven Peter Subject: Re: [PATCH 0/4] iommu: M1 Pro/Max DART support Message-ID: <20211130205631.GD28130@jannau.net> References: <20211117211509.28066-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211117211509.28066-1-sven@svenpeter.dev> User-Agent: Mutt/1.10.1 (2018-07-13) X-Mailman-Approved-At: Tue, 30 Nov 2021 21:57:04 +0000 Cc: devicetree@vger.kernel.org, Will Deacon , Hector Martin , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Rob Herring , linux-arm-kernel@lists.infradead.org, Robin Murphy , Alyssa Rosenzweig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 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 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hej, On 2021-11-17 22:15:05 +0100, Sven Peter wrote: > > This is a fairly brief series to add support for the DARTs present in the > M1 Pro/Max. They have two differences that make them incompatible with > those in the M1: > > - the physical addresses are shifted left by 4 bits and and have 2 more > bits inside the PTE entries > - the subpage protection feature is now mandatory. For Linux we can > just configure it to always allow access to the entire page. > > Note that this needs a fix to the core pagetable code. Hector already > sent a first version separately to the mailing list since the problem > is (at least in theory) also present on other SoCs using the LPAE format > with a large physical address space [1]. > > Sven > > [1] https://lore.kernel.org/linux-iommu/a2b45243-7e0a-a2ac-4e14-5256a3e7abb4@arm.com/T/#t > > Sven Peter (4): > dt-bindings: iommu: dart: add t6000 compatible > iommu/io-pgtable: Add DART subpage protection support > iommu/io-pgtable: Add DART PTE support for t6000 > iommu: dart: Support t6000 variant > > .../devicetree/bindings/iommu/apple,dart.yaml | 4 +- > drivers/iommu/apple-dart.c | 19 ++++++++- > drivers/iommu/io-pgtable-arm.c | 40 ++++++++++++++++++- > include/linux/io-pgtable.h | 2 + > 4 files changed, 61 insertions(+), 4 deletions(-) Whole series tested on M1 Max. Feel free to add Tested-by: Janne Grunau best Janne _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu