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Mon, 4 Dec 2023 18:13:48 -0800 Date: Mon, 4 Dec 2023 18:13:47 -0800 From: Nicolin Chen To: Jason Gunthorpe CC: , Joerg Roedel , , Robin Murphy , Will Deacon , Michael Shavit , Shameerali Kolothum Thodi Subject: Re: [PATCH v2 10/19] iommu/arm-smmu-v3: Compute the STE only once for each master Message-ID: References: <0-v2-de8b10590bf5+400-smmuv3_newapi_p1_jgg@nvidia.com> <10-v2-de8b10590bf5+400-smmuv3_newapi_p1_jgg@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <10-v2-de8b10590bf5+400-smmuv3_newapi_p1_jgg@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0001709A:EE_|PH7PR12MB6835:EE_ X-MS-Office365-Filtering-Correlation-Id: c0b14c8a-1fe9-4bd7-8015-08dbf537d26b 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:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(136003)(396003)(346002)(376002)(39860400002)(230922051799003)(1800799012)(451199024)(186009)(82310400011)(64100799003)(40470700004)(46966006)(36840700001)(40460700003)(426003)(478600001)(9686003)(26005)(336012)(316002)(7636003)(54906003)(6636002)(70586007)(70206006)(55016003)(86362001)(41300700001)(8676002)(6862004)(4326008)(8936002)(36860700001)(40480700001)(4744005)(2906002)(5660300002)(82740400003)(356005)(47076005)(33716001);DIR:OUT;SFP:1101; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Nov 13, 2023 at 01:53:17PM -0400, Jason Gunthorpe wrote: > Currently arm_smmu_install_ste_for_dev() iterates over every SID and > computes from scratch an identical STE. Every SID should have the same STE > contents. Turn this inside out so that the STE is supplied by the caller > and arm_smmu_install_ste_for_dev() simply installs it to every SID. > > This is possible now that the STE generation does not inform what sequence > should be used to program it. > > This allows splitting the STE calculation up according to the call site, > which following patches will make use of, and removes the confusing NULL > domain special case that only supported arm_smmu_detach_dev(). > > Signed-off-by: Jason Gunthorpe Reviewed-by: Nicolin Chen _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel