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Thu, 2 Jan 2025 14:30:56 -0800 Date: Thu, 2 Jan 2025 14:30:55 -0800 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v3 06/14] iommufd: Add IOMMUFD_OBJ_VIRQ and IOMMUFD_CMD_VIRQ_ALLOC Message-ID: References: <20250102204507.GF5556@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250102204507.GF5556@nvidia.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B06A:EE_|DS7PR12MB6309:EE_ X-MS-Office365-Filtering-Correlation-Id: de690a27-de28-411a-c213-08dd2b7d2c14 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|376014|1800799024|7416014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?RZlJJweWizOE+KVkpVB0cftBAkArHYpdt5fK4lsfGKRy8myjMR/6TXH4HcR5?= =?us-ascii?Q?4tVNf5zVM0hI8EoCZma2Qr2YWHT30Jk8/i7n4JY9O8Nyn1X2RGwfw/uzOB9b?= =?us-ascii?Q?xBS2DlbCauDWBAfyleQQTfjZFEBHNF4DTUM2WNxsgFxssYwxWCcNXv+XV1cx?= =?us-ascii?Q?/NuxalUIfkt4J7RxV2dKNcrp80FwLsX09zRzX05kDJTIlqu/nNua4ZZnrZk+?= =?us-ascii?Q?q/69ulLjXID14K83ZGsMl0fqC6808ZLBBGjiKzP19ZZvMLU9+biSByy9bIrL?= =?us-ascii?Q?F9Odk6utivsIcwY1yYN8ZFxwNR296adGyzz4zsa+luighCudTlkbs+0T/pc8?= =?us-ascii?Q?0fC1zGRrb9+AwAdZU4pIw+rxXcPEkC6Sci5EQyGuWOq612JANWGqijlbKj6e?= =?us-ascii?Q?T+0fzXdYxSG81yL7I3gB6ixAntrLk/1NQV7dXfZP/HxF9ToqtKA0wYAIxvVk?= =?us-ascii?Q?8H+Q1KmaLxWvKiYz9rZhZ/EswTN0nLd+npXmf1asQtWFxXxryf+flyyl/xF0?= =?us-ascii?Q?O8WnIpoFTdL87oom+Uyu8B6uZcdqbyEWb/rcc3uCKbh/jswJJINylqqKhkls?= =?us-ascii?Q?Hok14OkgPVg0k9RY72Vd5MgvQWDPGOjmVGrs5KEreFq+svGAoL1SfWQEWiv1?= =?us-ascii?Q?2M7apCG801rvIbXhRlhXDeKzg/T4vI9KkUdh6564pWXFDBlnK6YXVEmvIbU9?= =?us-ascii?Q?Ezsn/cVDRm3TG6aM0QMyYyXpid0av3KYRve8w0Fwgm9lU77OMw+inKAAzKxj?= =?us-ascii?Q?PytxZnvNQvPJrdulOHjfDQR151t/0uquFSxhpYsogvcMLPYhmEzR3bk/NAIN?= =?us-ascii?Q?mqiW99+HkuniYeI64VZJeeWcrqfsmbZrCecqz4tnxlycfR8RkTnO3pW9yzhZ?= =?us-ascii?Q?V0eI9YyixeposzKOJ/2pYO1yQjOLgXsJOFKvKwfLCInXpDfTludlUzWJCah8?= =?us-ascii?Q?Xjoilb63+c8/m/sWse1kRfipJfQXWJEfOFCL3+f0BiRnaGc6EyOUv/4JbNZa?= =?us-ascii?Q?3tFD7uBkr0FTx7HhWLGOJr8JCaNCHzEvBBvTjYY20H/2D16dwziiM+3Ks8oP?= =?us-ascii?Q?2yBQqNTvk85hu5fckYVRAtnWWu6iLDYo6IC/AYgT0pXUHXfZtkJaq4n6M6y4?= =?us-ascii?Q?WRB3JwgF8WDkaQX+JIjN/F/N4aWEMCEx4MJmCW1BFcyjOl+x9sRXUVgOoRmq?= =?us-ascii?Q?jqYtrrDYiXegGLR9E835R1J2RzxnGkhrPsT0v9gfjZGf9Lhkv6lVz6LBodsA?= =?us-ascii?Q?vw3mGNkk4X5VQ0n2US9Qpt7+BOJcnCjqANRVf6qoobsCVq7Rgt0ryfxI4mAj?= =?us-ascii?Q?jnZItzpEsK59vE9l+8qf7f0Z2IKlbw4C9QsDgP8vMosn2WenftHX5GJ/wViJ?= =?us-ascii?Q?M2KYEUBzSIR3oQHNgf7Alzaegxq5oC5KQN3J+ov4b2jYpX9QrDmxgZAn79Ld?= =?us-ascii?Q?yZX1Gx2C7j87gqCDTUjOm/L+PH25JXjuzmuZgkXKIR0ih5wdpt0SSgXTA2LC?= =?us-ascii?Q?zTG0W+Ct395CYZQ=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(82310400026)(376014)(1800799024)(7416014);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jan 2025 22:31:16.4911 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: de690a27-de28-411a-c213-08dd2b7d2c14 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B06A.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6309 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250102_143133_475558_053FF0E8 X-CRM114-Status: GOOD ( 16.42 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jan 02, 2025 at 04:45:07PM -0400, Jason Gunthorpe wrote: > On Tue, Dec 17, 2024 at 09:00:19PM -0800, Nicolin Chen wrote: > > Allow a vIOMMU object to allocate vIRQ Event Queues, with a condition that > > each vIOMMU can only have one single vIRQ event queue per type. > > I suggest you should tend to use the eventq as the primary naming not > vIRQ, I think that will be a bit clearer. > > The virq in the VM is edge triggered by an event queue FD becoming > readable, but the event queue is the file descriptor that reports a > batch of events on read(). > > The virq name evokes similarities to the virq in vfio which is purely > about conveying if an IRQ edge has happened through an eventfd and has > no event queue associated with it. Ack. By doing the "Part-3: vEVENTQ" specifying one type of queue, I think the Part-4 then should be "vCMDQ" likewise v.s. "vQUEUE". Thanks Nicolin