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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 82780C34047 for ; Wed, 19 Feb 2020 09:46:14 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 3851E24671 for ; Wed, 19 Feb 2020 09:46:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3851E24671 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 10FB820357; Wed, 19 Feb 2020 09:46:14 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RcZpB-MUUoEv; Wed, 19 Feb 2020 09:46:12 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 6B2C72039C; Wed, 19 Feb 2020 09:46:12 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4C7A3C1D81; Wed, 19 Feb 2020 09:46:12 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3330DC013E for ; Wed, 19 Feb 2020 09:46:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 2121084031 for ; Wed, 19 Feb 2020 09:46:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HFDZfgN7MR4X for ; Wed, 19 Feb 2020 09:46:09 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by whitealder.osuosl.org (Postfix) with ESMTPS id A039782383 for ; Wed, 19 Feb 2020 09:46:09 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 38850346; Wed, 19 Feb 2020 10:46:06 +0100 (CET) Date: Wed, 19 Feb 2020 10:46:04 +0100 From: Joerg Roedel To: "Isaac J. Manjarres" Subject: Re: [RFC PATCH] iommu/dma: Allow drivers to reserve an iova range Message-ID: <20200219094604.GI22063@8bytes.org> References: <1581721096-16235-1-git-send-email-isaacm@codeaurora.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1581721096-16235-1-git-send-email-isaacm@codeaurora.org> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: kernel-team@android.com, iommu@lists.linux-foundation.org, pratikp@codeaurora.org, linux-kernel@vger.kernel.org, Liam Mark 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, Feb 14, 2020 at 02:58:16PM -0800, Isaac J. Manjarres wrote: > From: Liam Mark > > Some devices have a memory map which contains gaps or holes. > In order for the device to have as much IOVA space as possible, > allow its driver to inform the DMA-IOMMU layer that it should > not allocate addresses from these holes. > > Change-Id: I15bd1d313d889c2572d0eb2adecf6bebde3267f7 > Signed-off-by: Isaac J. Manjarres Ideally this is something put into the IOMMU firmware table by the platform firmware. If its not there, a quirk is the best way to handle this. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu