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Tue, 19 Dec 2023 10:09:13 -0800 From: Dragos Tatulea To: "Michael S . Tsirkin" , Jason Wang , Eugenio Perez Martin , Si-Wei Liu , Saeed Mahameed , Leon Romanovsky , , Gal Pressman CC: Dragos Tatulea , , , Parav Pandit , Xuan Zhuo Subject: [PATCH vhost v4 03/15] vdpa: Add VHOST_BACKEND_F_CHANGEABLE_VQ_STATE_IN_SUSPEND flag Date: Tue, 19 Dec 2023 20:08:46 +0200 Message-ID: <20231219180858.120898-4-dtatulea@nvidia.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231219180858.120898-1-dtatulea@nvidia.com> References: <20231219180858.120898-1-dtatulea@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: BL6PEPF0001AB72:EE_|SA3PR12MB7922:EE_ X-MS-Office365-Filtering-Correlation-Id: 32a3734e-99f7-4866-031d-08dc00bda66d 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)(396003)(136003)(376002)(39860400002)(230922051799003)(1800799012)(451199024)(82310400011)(186009)(64100799003)(46966006)(36840700001)(40470700004)(40460700003)(40480700001)(6666004)(426003)(1076003)(86362001)(2906002)(4744005)(2616005)(5660300002)(66574015)(336012)(83380400001)(7636003)(356005)(26005)(47076005)(36860700001)(82740400003)(316002)(110136005)(4326008)(36756003)(54906003)(41300700001)(6636002)(478600001)(8936002)(70206006)(8676002)(70586007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Dec 2023 18:09:31.8873 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 32a3734e-99f7-4866-031d-08dc00bda66d 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: BL6PEPF0001AB72.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7922 The virtio spec doesn't allow changing virtqueue state after DRIVER_OK. Some devices do support this operation when the device is suspended. The VHOST_BACKEND_F_CHANGEABLE_VQ_STATE_IN_SUSPEND flag advertises this support as a backend features. Signed-off-by: Dragos Tatulea Suggested-by: Eugenio Pérez --- include/uapi/linux/vhost_types.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h index aacd067afc89..848dadc95ca1 100644 --- a/include/uapi/linux/vhost_types.h +++ b/include/uapi/linux/vhost_types.h @@ -196,5 +196,9 @@ struct vhost_vdpa_iova_range { * and is in state DRIVER_OK. */ #define VHOST_BACKEND_F_CHANGEABLE_VQ_ADDR_IN_SUSPEND 0x9 +/* Device supports changing virtqueue state when device is suspended + * and is in state DRIVER_OK. + */ +#define VHOST_BACKEND_F_CHANGEABLE_VQ_STATE_IN_SUSPEND 0x10 #endif -- 2.43.0