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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 0353EC5518A for ; Wed, 22 Apr 2020 08:09:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D77BB2071E for ; Wed, 22 Apr 2020 08:09:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726502AbgDVIJh (ORCPT ); Wed, 22 Apr 2020 04:09:37 -0400 Received: from mga01.intel.com ([192.55.52.88]:3118 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725810AbgDVIJb (ORCPT ); Wed, 22 Apr 2020 04:09:31 -0400 IronPort-SDR: +m9f03o3W9SDK07bd3LqMR+nvhEDE7W6pQJuBEnjkB4ku3iNfa3D/PQsYQHM28bk9TVWj/6qlq k4KAXFmPoa9Q== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2020 01:09:31 -0700 IronPort-SDR: Wn0DWR4rFVqBBrCZR51mE6qJ8Dy3fREZ6QTcElA5HhY5SG33s1lX4qDQ/7GX4xlVcjXdSgWO+R VTWyrEQ4b/vQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,412,1580803200"; d="scan'208";a="365609644" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga001.fm.intel.com with ESMTP; 22 Apr 2020 01:09:29 -0700 From: Lu Baolu To: Joerg Roedel Cc: ashok.raj@intel.com, jacob.jun.pan@linux.intel.com, Liu Yi L , kevin.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v3 4/4] iommu/vt-d: Remove redundant IOTLB flush Date: Wed, 22 Apr 2020 16:06:11 +0800 Message-Id: <20200422080611.15689-5-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200422080611.15689-1-baolu.lu@linux.intel.com> References: <20200422080611.15689-1-baolu.lu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org IOTLB flush already included in the PASID tear down and the page request drain process. There is no need to flush again. Signed-off-by: Jacob Pan Signed-off-by: Lu Baolu --- drivers/iommu/intel-svm.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 2534641ef707..543109fe2003 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -212,7 +212,6 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm) list_for_each_entry_rcu(sdev, &svm->devs, list) { intel_pasid_tear_down_entry(svm->iommu, sdev->dev, svm->pasid); intel_svm_drain_prq(sdev->dev, svm->pasid); - intel_flush_svm_range_dev(svm, sdev, 0, -1, 0); } rcu_read_unlock(); @@ -406,7 +405,6 @@ int intel_svm_unbind_gpasid(struct device *dev, int pasid) list_del_rcu(&sdev->list); intel_pasid_tear_down_entry(iommu, dev, svm->pasid); intel_svm_drain_prq(dev, svm->pasid); - intel_flush_svm_range_dev(svm, sdev, 0, -1, 0); kfree_rcu(sdev, rcu); if (list_empty(&svm->devs)) { @@ -645,7 +643,6 @@ int intel_svm_unbind_mm(struct device *dev, int pasid) * hard to be as defensive as we might like. */ intel_pasid_tear_down_entry(iommu, dev, svm->pasid); intel_svm_drain_prq(dev, svm->pasid); - intel_flush_svm_range_dev(svm, sdev, 0, -1, 0); kfree_rcu(sdev, rcu); if (list_empty(&svm->devs)) { -- 2.17.1