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Mon, 15 Aug 2022 11:14:51 -0700 From: Nicolin Chen To: , , , Subject: [PATCH v6 4/5] vfio/iommu_type1: Clean up update_dirty_scope in detach_group() Date: Mon, 15 Aug 2022 11:14:36 -0700 Message-ID: <20220815181437.28127-5-nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220815181437.28127-1-nicolinc@nvidia.com> References: <20220815181437.28127-1-nicolinc@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a9b34f92-e9f9-4975-5d64-08da7eea4ba2 X-MS-TrafficTypeDiagnostic: PH8PR12MB6721:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.235;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230016)(4636009)(346002)(39860400002)(136003)(396003)(376002)(36840700001)(40470700004)(46966006)(478600001)(36756003)(6666004)(7696005)(86362001)(2616005)(26005)(186003)(1076003)(41300700001)(336012)(426003)(47076005)(83380400001)(82310400005)(40480700001)(5660300002)(70586007)(8676002)(4326008)(54906003)(110136005)(316002)(40460700003)(70206006)(81166007)(356005)(36860700001)(8936002)(7406005)(7416002)(82740400003)(2906002)(15650500001)(14143004)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2022 18:16:38.1319 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a9b34f92-e9f9-4975-5d64-08da7eea4ba2 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.235];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT113.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6721 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220815_111647_800561_BC0A7785 X-CRM114-Status: GOOD ( 13.62 ) 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: , Cc: marcan@marcan.st, mjrosato@linux.ibm.com, virtualization@lists.linux-foundation.org, thierry.reding@gmail.com, alyssa@rosenzweig.io, jean-philippe@linaro.org, kvm@vger.kernel.org, zhang.lyra@gmail.com, jon@solid-run.com, jonathanh@nvidia.com, iommu@lists.linux.dev, jgg@nvidia.com, yangyingliang@huawei.com, orsonzhai@gmail.com, gerald.schaefer@linux.ibm.com, kevin.tian@intel.com, sven@svenpeter.dev, linux-arm-msm@vger.kernel.org, christophe.jaillet@wanadoo.fr, baolin.wang@linux.alibaba.com, thunder.leizhen@huawei.com, linux-tegra@vger.kernel.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, cohuck@redhat.com, linux-kernel@vger.kernel.org, shameerali.kolothum.thodi@huawei.com, robdclark@gmail.com, asahi@lists.linux.dev, suravee.suthikulpanit@amd.com, dwmw2@infradead.org, baolu.lu@linux.intel.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org All devices in emulated_iommu_groups have pinned_page_dirty_scope set, so the update_dirty_scope in the first list_for_each_entry is always false. Clean it up, and move the "if update_dirty_scope" part from the detach_group_done routine to the domain_list part. Suggested-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Signed-off-by: Nicolin Chen --- drivers/vfio/vfio_iommu_type1.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 523927d61aac..3b63a5a237c9 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -2464,14 +2464,12 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, struct vfio_iommu *iommu = iommu_data; struct vfio_domain *domain; struct vfio_iommu_group *group; - bool update_dirty_scope = false; LIST_HEAD(iova_copy); mutex_lock(&iommu->lock); list_for_each_entry(group, &iommu->emulated_iommu_groups, next) { if (group->iommu_group != iommu_group) continue; - update_dirty_scope = !group->pinned_page_dirty_scope; list_del(&group->next); kfree(group); @@ -2480,7 +2478,8 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, WARN_ON(!list_empty(&iommu->device_list)); vfio_iommu_unmap_unpin_all(iommu); } - goto detach_group_done; + mutex_unlock(&iommu->lock); + return; } /* @@ -2496,9 +2495,7 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, continue; iommu_detach_group(domain->domain, group->iommu_group); - update_dirty_scope = !group->pinned_page_dirty_scope; list_del(&group->next); - kfree(group); /* * Group ownership provides privilege, if the group list is * empty, the domain goes away. If it's the last domain with @@ -2522,6 +2519,16 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, vfio_iommu_aper_expand(iommu, &iova_copy); vfio_update_pgsize_bitmap(iommu); } + /* + * Removal of a group without dirty tracking may allow + * the iommu scope to be promoted. + */ + if (!group->pinned_page_dirty_scope) { + iommu->num_non_pinned_groups--; + if (iommu->dirty_page_tracking) + vfio_iommu_populate_bitmap_full(iommu); + } + kfree(group); break; } @@ -2530,16 +2537,6 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, else vfio_iommu_iova_free(&iova_copy); -detach_group_done: - /* - * Removal of a group without dirty tracking may allow the iommu scope - * to be promoted. - */ - if (update_dirty_scope) { - iommu->num_non_pinned_groups--; - if (iommu->dirty_page_tracking) - vfio_iommu_populate_bitmap_full(iommu); - } mutex_unlock(&iommu->lock); }