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Tsirkin" , Jason Wang , Eugenio Perez Martin , Si-Wei Liu , Saeed Mahameed , Leon Romanovsky , CC: Dragos Tatulea , , , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost v4 07/16] vdpa/mlx5: Take cvq iotlb lock during refresh Date: Wed, 18 Oct 2023 20:14:46 +0300 Message-ID: <20231018171456.1624030-9-dtatulea@nvidia.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231018171456.1624030-2-dtatulea@nvidia.com> References: <20231018171456.1624030-2-dtatulea@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000FCBF:EE_|DS7PR12MB9041:EE_ X-MS-Office365-Filtering-Correlation-Id: 81ee4425-fdf7-4ec1-8ce4-08dbcffdeacc 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:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(346002)(39860400002)(396003)(376002)(136003)(230922051799003)(64100799003)(451199024)(186009)(82310400011)(1800799009)(36840700001)(46966006)(40470700004)(70206006)(54906003)(110136005)(36756003)(83380400001)(336012)(426003)(70586007)(47076005)(2906002)(66574015)(316002)(966005)(478600001)(82740400003)(8676002)(8936002)(36860700001)(41300700001)(40460700003)(26005)(356005)(2616005)(4326008)(40480700001)(7636003)(86362001)(1076003)(5660300002);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Oct 2023 17:16:07.4444 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 81ee4425-fdf7-4ec1-8ce4-08dbcffdeacc X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000FCBF.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB9041 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The reslock is taken while refresh is called but iommu_lock is more specific to this resource. So take the iommu_lock during cvq iotlb refresh. Based on Eugenio's patch [0]. [0] https://lore.kernel.org/lkml/20230112142218.725622-4-eperezma@redhat.com/ Acked-by: Jason Wang Suggested-by: Eugenio Pérez Reviewed-by: Eugenio Pérez Signed-off-by: Dragos Tatulea --- drivers/vdpa/mlx5/core/mr.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c index fcb6ae32e9ed..587300e7c18e 100644 --- a/drivers/vdpa/mlx5/core/mr.c +++ b/drivers/vdpa/mlx5/core/mr.c @@ -590,11 +590,19 @@ int mlx5_vdpa_update_cvq_iotlb(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb, unsigned int asid) { + int err; + if (mvdev->group2asid[MLX5_VDPA_CVQ_GROUP] != asid) return 0; + spin_lock(&mvdev->cvq.iommu_lock); + prune_iotlb(mvdev); - return dup_iotlb(mvdev, iotlb); + err = dup_iotlb(mvdev, iotlb); + + spin_unlock(&mvdev->cvq.iommu_lock); + + return err; } int mlx5_vdpa_create_dma_mr(struct mlx5_vdpa_dev *mvdev) -- 2.41.0