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