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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 05C43C433E0 for ; Fri, 29 May 2020 12:53:21 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 B9C0420814 for ; Fri, 29 May 2020 12:53:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9C0420814 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 fraxinus.osuosl.org (Postfix) with ESMTP id 93AC8873A7; Fri, 29 May 2020 12:53:20 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lWjqUtVJme9x; Fri, 29 May 2020 12:53:20 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 0423F869FE; Fri, 29 May 2020 12:53:20 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id E5785C088A; Fri, 29 May 2020 12:53:19 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 145B8C016F for ; Fri, 29 May 2020 12:53:18 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id EE76B8838C for ; Fri, 29 May 2020 12:53:17 +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 luR8Im8kJZAy for ; Fri, 29 May 2020 12:53:16 +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 C95A588372 for ; Fri, 29 May 2020 12:53:15 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id E4B0A327; Fri, 29 May 2020 14:53:12 +0200 (CEST) Date: Fri, 29 May 2020 14:53:11 +0200 From: Joerg Roedel To: Jean-Philippe Brucker Subject: Re: [PATCH v2 0/2] iommu: Remove iommu_sva_ops::mm_exit() Message-ID: <20200529125310.GA14598@8bytes.org> References: <20200423125329.782066-1-jean-philippe@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200423125329.782066-1-jean-philippe@linaro.org> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: arnd@arndb.de, gregkh@linuxfoundation.org, jgg@ziepe.ca, iommu@lists.linux-foundation.org, zhangfei.gao@linaro.org, linux-accelerators@lists.ozlabs.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 Thu, Apr 23, 2020 at 02:53:27PM +0200, Jean-Philippe Brucker wrote: > The IOMMU SVA API currently requires device drivers to implement an > mm_exit() callback, which stops device jobs that do DMA. This function > is called in the release() MMU notifier, when an address space that is > shared with a device exits. > > It has been noted several time during discussions about SVA that > cancelling DMA jobs can be slow and complex, and doing it in the > release() notifier might cause synchronization issues. Device drivers > must in any case call unbind() to remove their bond, after stopping DMA > from a more favorable context (release of a file descriptor). > > Patch 1 removes the mm_exit() callback from the uacce module, and patch > 2 removes it from the IOMMU API. Since v1 [1] I fixed the uacce unbind > reported by Zhangfei and added details in the commit message of patch 2. > > Jean-Philippe Brucker (2): > uacce: Remove mm_exit() op > iommu: Remove iommu_sva_ops::mm_exit() Applied, thanks. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu