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=-15.2 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 DCDB8C433E9 for ; Sun, 28 Feb 2021 06:33:16 +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 9135064E55 for ; Sun, 28 Feb 2021 06:33:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9135064E55 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 560FA83FBB; Sun, 28 Feb 2021 06:33:16 +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 8A29usZE9uAv; Sun, 28 Feb 2021 06:33:15 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTP id 1F31E83FC8; Sun, 28 Feb 2021 06:33:15 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 960F8C0011; Sun, 28 Feb 2021 06:33:14 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 188BAC000B for ; Sun, 28 Feb 2021 06:33:13 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id EDE1A431E8 for ; Sun, 28 Feb 2021 06:33:12 +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 663zulN2wEQp for ; Sun, 28 Feb 2021 06:33:12 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by smtp2.osuosl.org (Postfix) with ESMTPS id 521B641468 for ; Sun, 28 Feb 2021 06:33:12 +0000 (UTC) IronPort-SDR: ZSVhNTWPahGRXEJrw7gB3ciqgG1W1XUKPZzRoDLNooEue+diDPnwIFQfCvpV1AZ5qIUGbAfA0r AIW3h4UZI4og== X-IronPort-AV: E=McAfee;i="6000,8403,9908"; a="247624814" X-IronPort-AV: E=Sophos;i="5.81,211,1610438400"; d="scan'208";a="247624814" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2021 22:33:10 -0800 IronPort-SDR: ZQMYI6AaWKQnl0GwWA6VKAvPIUZYucjCp6vofbUAVWe6A8qt84ahb66+Pq49XgsyBVoWGc5uKg Kyi7K407u3YQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,211,1610438400"; d="scan'208";a="517029731" Received: from otc-wp-03.jf.intel.com ([10.54.39.79]) by orsmga004.jf.intel.com with ESMTP; 27 Feb 2021 22:33:10 -0800 From: Jacob Pan To: LKML , Joerg Roedel , "Lu Baolu" , David Woodhouse , iommu@lists.linux-foundation.org, cgroups@vger.kernel.org, Tejun Heo , Li Zefan , Johannes Weiner , Jean-Philippe Brucker Subject: [PATCH V4 12/18] iommu/vt-d: Remove mm reference for guest SVA Date: Sat, 27 Feb 2021 14:01:20 -0800 Message-Id: <1614463286-97618-13-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1614463286-97618-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1614463286-97618-1-git-send-email-jacob.jun.pan@linux.intel.com> Cc: "Tian, Kevin" , Dave Jiang , Raj Ashok , Jonathan Corbet , Alex Williamson , Jason Gunthorpe , Wu Hao 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Now that IOASID core keeps track of the IOASID to mm_struct ownership in the forms of ioasid_set with IOASID_SET_TYPE_MM token type, there is no need to keep the same mapping in VT-d driver specific data. Native SVM usage is not affected by the change. Signed-off-by: Jacob Pan --- drivers/iommu/intel/svm.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c index c469c24d23f5..f75699ddb923 100644 --- a/drivers/iommu/intel/svm.c +++ b/drivers/iommu/intel/svm.c @@ -363,12 +363,6 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev, ret = -ENOMEM; goto out; } - /* REVISIT: upper layer/VFIO can track host process that bind - * the PASID. ioasid_set = mm might be sufficient for vfio to - * check pasid VMM ownership. We can drop the following line - * once VFIO and IOASID set check is in place. - */ - svm->mm = get_task_mm(current); svm->pasid = data->hpasid; if (data->flags & IOMMU_SVA_GPASID_VAL) { svm->gpasid = data->gpasid; @@ -376,7 +370,6 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev, } ioasid_attach_data(data->hpasid, svm); INIT_LIST_HEAD_RCU(&svm->devs); - mmput(svm->mm); } sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); if (!sdev) { -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu