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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0968AC433EF for ; Mon, 18 Oct 2021 10:25:54 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 810E960FF2 for ; Mon, 18 Oct 2021 10:25:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 810E960FF2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 499AC82681; Mon, 18 Oct 2021 10:25:53 +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 0ymNwSrVRNmj; Mon, 18 Oct 2021 10:25:52 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTPS id 2DB18823F9; Mon, 18 Oct 2021 10:25:52 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D63C0C0011; Mon, 18 Oct 2021 10:25:51 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8B11AC000D for ; Mon, 18 Oct 2021 10:25:50 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 7618F403B6 for ; Mon, 18 Oct 2021 10:25:50 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UAFDxRbCccYk for ; Mon, 18 Oct 2021 10:25:49 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from theia.8bytes.org (8bytes.org [IPv6:2a01:238:4383:600:38bc:a715:4b6d:a889]) by smtp2.osuosl.org (Postfix) with ESMTPS id 8D766402B9 for ; Mon, 18 Oct 2021 10:25:49 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 6D49D450; Mon, 18 Oct 2021 12:25:45 +0200 (CEST) Date: Mon, 18 Oct 2021 12:25:38 +0200 From: Joerg Roedel To: Boris Brezillon Subject: Re: [PATCH v2 1/5] [RFC]iommu: Add a IOMMU_DEVONLY protection flag Message-ID: References: <20211001143427.1564786-1-boris.brezillon@collabora.com> <20211001143427.1564786-2-boris.brezillon@collabora.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211001143427.1564786-2-boris.brezillon@collabora.com> Cc: Tomeu Vizoso , Will Deacon , dri-devel@lists.freedesktop.org, Steven Price , iommu@lists.linux-foundation.org, Rob Herring , Alyssa Rosenzweig , Robin Murphy , linux-arm-kernel@lists.infradead.org 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" On Fri, Oct 01, 2021 at 04:34:23PM +0200, Boris Brezillon wrote: > +/* > + * Mapping is only accessed by the device behind the iommu. That means other > + * devices or CPUs are not expected to access this physical memory region, > + * and the MMU driver can safely restrict the shareability domain to the > + * device itself. > + */ > +#define IOMMU_DEVONLY (1 << 6) I am not entirely happy with the name, how about IOMMU_DEV_PRIVATE? PRIV would conflict with IOMMU_PRIV (which should probably also be IOMMU_PRIVILEGED, but thats another problem). Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu