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 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 9E611C433F5 for ; Mon, 18 Oct 2021 10:56:56 +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 67AD561354 for ; Mon, 18 Oct 2021 10:56:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 67AD561354 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=Xp+sQwxoEsaZyAIK4Qk759GAMxQtRvOLwoLO4W7gVtk=; b=zZbX8NrCGMpW5K AVjBNNSt7yOX6YQ9vhXSb5/VZD3mHGnstuKEcox5muldLvHwtTB1YfuGQGAwQHyjEgI8mm2/Dukey XVbKqVWIySD3wE9Jus5dQPrhRg6iYxo63ekxzML1CqCgdtX/0OzrotKEQIkRPu85Z8I7HGZvs3pII t0SYvdupMcjweZpWUoqG7CxBAHRURR7VfZTImbMVt9jKT5EAFq/SGMUJPgizJzc5SiNw4bhUQ4FAY 7Ct426IBbl1K5laaUTPLWuHiisrfBfts8iDK8HkZPEqZQjDvjYM7wX5DwEaksXiGbxEUT1CHpLEdb m+Xg90im3qwBztfXOAHg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mcQIo-00FAEK-0c; Mon, 18 Oct 2021 10:55:34 +0000 Received: from 8bytes.org ([81.169.241.247] helo=theia.8bytes.org) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mcPq2-00F09i-Fg for linux-arm-kernel@lists.infradead.org; Mon, 18 Oct 2021 10:25:52 +0000 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 Cc: iommu@lists.linux-foundation.org, Rob Herring , Tomeu Vizoso , Alyssa Rosenzweig , Steven Price , Robin Murphy , Will Deacon , linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211018_032550_714721_73FBF78D X-CRM114-Status: GOOD ( 11.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 64E1FC433EF for ; Mon, 18 Oct 2021 10:34:18 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 12A026103B for ; Mon, 18 Oct 2021 10:34:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 12A026103B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C3346E868; Mon, 18 Oct 2021 10:34:17 +0000 (UTC) X-Greylist: delayed 508 seconds by postgrey-1.36 at gabe; Mon, 18 Oct 2021 10:34:15 UTC Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by gabe.freedesktop.org (Postfix) with ESMTPS id A05FD6E868 for ; Mon, 18 Oct 2021 10:34:15 +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 Cc: iommu@lists.linux-foundation.org, Rob Herring , Tomeu Vizoso , Alyssa Rosenzweig , Steven Price , Robin Murphy , Will Deacon , linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211001143427.1564786-2-boris.brezillon@collabora.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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