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Mon, 28 Apr 2025 11:10:41 -0700 Date: Mon, 28 Apr 2025 11:10:40 -0700 From: Nicolin Chen To: Baolu Lu CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v2 09/22] iommufd/viommu: Introduce IOMMUFD_OBJ_VCMDQ and its related struct Message-ID: References: <8bab0069503fa21b48298ed2ffe29a06963f71f5.1745646960.git.nicolinc@nvidia.com> <28e513ec-4d8b-4967-a241-d6f63d533050@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <28e513ec-4d8b-4967-a241-d6f63d533050@linux.intel.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00020E61:EE_|SA1PR12MB5659:EE_ X-MS-Office365-Filtering-Correlation-Id: 4f6293ef-6719-48e0-8e95-08dd86800a2c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|1800799024|36860700013|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?NFHjORpNmYiDZU/3jj6F3cLH/QGwqaiV+nZibujVSz4BDyd6H7naYTfQ849Y?= =?us-ascii?Q?Xdx2w54aYI274p84W4moDfD0Gm4mgdsQL04IrqxjDws0pBWr7Jt18EKssaXX?= =?us-ascii?Q?AwrIZK7d888McxDK9LDFq4JCL8NwcXvnAPXEjjFgij5bviyCVT3GO5QbkSdB?= =?us-ascii?Q?EDKwbQZjpjdWOvFIHp5iUL4aY1kFxVxlNvuTALVlS6gnxT4Ta5PsLfU8fVHj?= =?us-ascii?Q?T88/u9DWPQGEvW+BO77ga06h7DAKPxrWQa+auAluqQOq1T5mUQvtITFfyYPF?= =?us-ascii?Q?cjBIOFrkR23yUm0h0g3zLCcYSp7UKb2DwtspjFE7USuTjkZRlN37r+kKIzFH?= =?us-ascii?Q?0LeWWOY5MS9oc1x+tkrGVkVvlQlXkm87WwYqsdrY1yl8J2HpYl+OZotCxFSA?= =?us-ascii?Q?XSGwh9OnwXnco7Qg043BCN7US2XOrFQQ3sLOQLdZpEKcaU840fPpyF1mVWVs?= =?us-ascii?Q?LXdh9J69Vt8acRrwNmK2GfyM/Tck0EPMM8gi7a/VwWqqyZc2HUO04mpFg5T0?= =?us-ascii?Q?lUTfQ4CeUMQYXY9wNBQYdSLcm7CEBaOMlE5BQ/g8oex890UqcwdIMpOsfVyJ?= =?us-ascii?Q?UmD3n0HE1WAtDqop6lfW3Kabb5Nf1vXBYBiJ4SVSZqzxv1N8N4UeTVFjIC2v?= =?us-ascii?Q?YL57hzMoAB/K+/RIBZ3ABF3RByGKluPcig+sVzJE6l6g3fHS7HJV1aqHciTT?= =?us-ascii?Q?wgV3xu50rc742dYMSAGV8YUiC0STV2N38I85OhKTb04ZAXxOMlsNbYjsVYyX?= =?us-ascii?Q?QyQ17L9fA/g1oW9GMJVOIBlxnhSVIe+iOhnLyI2Ot33F3kUhbVIAft5wOKjp?= =?us-ascii?Q?ybe6KNbctoTVE1phiJq4LUGgHgexbPzvRpZnbRi1td7giKDmh2dcKhbZv8cv?= =?us-ascii?Q?vbMGxarX+o3romTeAUI3jJHYGdCFbkjq9/AX6d9z1L/er9kdsotmwvwooWCh?= =?us-ascii?Q?XGlU4hzN5jOixze+KqCu+NUr+wABjBaSeDBKFaFJpiVqgS08hKRuzm5t7AGA?= =?us-ascii?Q?r9hbpzMShhew6weM2SFj4MUwPs3kKI1ouYHhV4mmlUHLv0bCV6hYtPvR09Iw?= =?us-ascii?Q?1cz2UZ9l6aHcx6DikrtDii8gwslJsI24K9TfQMlj4uXWOISlnI2MAgIkBmof?= =?us-ascii?Q?d0Mm/1tYcaqxA0llN8+VzhuB4AY2X+N+/YIn9jMN53IZ6F+vs5ekkJzBUZ7W?= =?us-ascii?Q?mJwsJ5rlSheot5m/lK74tXWP8MM4vp+XMltEyn/F5uZuqxWcDzcz0+QeQ/93?= =?us-ascii?Q?x8/bFfI2i0xPgj8hVY7jFG2CmR3MK+ciIof7u6aP7de63gDzz5gtBnqin2NS?= =?us-ascii?Q?LT0oCMkb9ZrPlhzTk/tA+cD2L4ooRI+Zv6s4qvCHBj24CjusUW9QIsR07/TL?= =?us-ascii?Q?eiR0B0cXY3XGgwzD+r7e13FLK8to20XBpDMxuvJdBmWI0MP2VDEErm2imsZH?= =?us-ascii?Q?KV68XP4KOpEvPZmRCc60BoUMOvbtbRaXTxnroqjNDuxhcZ689wc8iS9OgKHc?= =?us-ascii?Q?955IK4EV4OtxOVFA6LlrVrGG9xwqB2Bi1S8n?= 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:(13230040)(376014)(7416014)(82310400026)(1800799024)(36860700013)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2025 18:11:03.9000 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4f6293ef-6719-48e0-8e95-08dd86800a2c 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: BL6PEPF00020E61.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB5659 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250428_111112_614346_4325D8B3 X-CRM114-Status: GOOD ( 17.79 ) 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 Mon, Apr 28, 2025 at 09:09:19AM +0800, Baolu Lu wrote: > On 4/26/25 13:58, Nicolin Chen wrote: > > Add a new IOMMUFD_OBJ_VCMDQ with an iommufd_vcmdq structure, representing > > a command queue type of physical HW passed to a user space VM. This vCMDQ > > object, is a subset of vIOMMU resources of a physical IOMMU's, such as: > > - NVIDIA's virtual command queue > > - AMD vIOMMU's command buffer > > > > Inroduce a struct iommufd_vcmdq and its allocator iommufd_vcmdq_alloc(). > > Also add a pair of viommu ops for iommufd to forward user space ioctls to > > IOMMU drivers. > > > > Signed-off-by: Nicolin Chen > > Reviewed-by: Lu Baolu > > with a small nit below ... > > > --- > > include/linux/iommufd.h | 35 +++++++++++++++++++++++++++++++++++ > > 1 file changed, 35 insertions(+) > > > > diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h > > index ef0d3c4765cf..e91381aaec5a 100644 > > --- a/include/linux/iommufd.h > > +++ b/include/linux/iommufd.h > > @@ -37,6 +37,7 @@ enum iommufd_object_type { > > IOMMUFD_OBJ_VIOMMU, > > IOMMUFD_OBJ_VDEVICE, > > IOMMUFD_OBJ_VEVENTQ, > > + IOMMUFD_OBJ_VCMDQ, > > #ifdef CONFIG_IOMMUFD_TEST > > IOMMUFD_OBJ_SELFTEST, > > #endif > > @@ -112,6 +113,14 @@ struct iommufd_vdevice { > > u64 id; /* per-vIOMMU virtual ID */ > > }; > > +struct iommufd_vcmdq { > > + struct iommufd_object obj; > > + struct iommufd_ctx *ictx; > > + struct iommufd_viommu *viommu; > > + dma_addr_t addr; > > It's better to add a comment to state that @addr is a guest physical > address. Or not? Yea. Let's add one: dma_addr_t addr; /* in guest physical address space */ Thanks Nicolin