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Wysocki" , Shameerali Kolothum Thodi , Mostafa Saleh Subject: Re: [PATCH v4 00/12] Initial support for SMMUv3 nested translation Message-ID: <20250122192622.GA965540@nvidia.com> References: <0-v4-9e99b76f3518+3a8-smmuv3_nesting_jgg@nvidia.com> <20241112182938.GA172989@nvidia.com> <20241113012359.GB35230@nvidia.com> <9df3dd17-375a-4327-b2a8-e9f7690d81b1@linux.intel.com> <20241113164316.GL35230@nvidia.com> <6ed97a10-853f-429e-8506-94b218050ad3@linux.intel.com> <20241115175522.GA35230@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241115175522.GA35230@nvidia.com> X-ClientProxiedBy: MN0PR04CA0003.namprd04.prod.outlook.com (2603:10b6:208:52d::15) To CH3PR12MB8659.namprd12.prod.outlook.com (2603:10b6:610:17c::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR12MB8659:EE_|SA0PR12MB7462:EE_ X-MS-Office365-Filtering-Correlation-Id: eae9cc8b-a81e-4637-c49e-08dd3b1aa875 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024; 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I have a patch series that eliminates it from all the other > > > drivers, and I wrote a patch to remove FEAT_SVA from intel.. > > > > Yes, sure. Let's make this happen in the next cycle. > > > > FEAT_IOPF could be removed. IOPF manipulation can be handled in the > > domain attachment path. A per-device refcount can be implemented. This > > count increments with each iopf-capable domain attachment and decrements > > with each detachment. PCI PRI is enabled for the first iopf-capable > > domain and disabled when the last one is removed. Probably we can also > > solve the PF/VF sharing PRI issue. > > Here is what I have so far, if you send me a patch for vt-d to move > FEAT_IOPF into attach as you describe above (see what I did to arm for > example), then I can send it next cycle > > https://github.com/jgunthorpe/linux/commits/iommu_no_feat/ Hey Baolu, a reminder on this, lets try for it next cycle? Thanks, Jason