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Mon, 29 Sep 2025 11:52:10 -0700 Date: Mon, 29 Sep 2025 11:52:09 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , , , Subject: Re: [PATCH rfcv2 4/8] iommu/arm-smmu-v3: Introduce a per-domain arm_smmu_invs array Message-ID: References: <80310b98efa4bd7e95d7b3ca302f40d4d69e59c5.1757373449.git.nicolinc@nvidia.com> <20250924212912.GP2617119@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250924212912.GP2617119@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000252A3:EE_|SA0PR12MB4398:EE_ X-MS-Office365-Filtering-Correlation-Id: 054106ee-2895-4e22-ed62-08ddff8955a8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?MQGZBIOO9yEMRC4CozVt8SY9ydZxlWOKNc4cdWxKb6aeYIAxR8vJPP7ztfuC?= =?us-ascii?Q?8RKCfSNgV8V5ZtQ9etF0KHbphy22qp7ZvWaDf3xrsxhsh72TsryAGbJyWMqF?= =?us-ascii?Q?wXCWeR8pb4W1gqv3X5Mf05MBKc9Sm+mqP9RDB9XkUghyhCYc2pVCKSWJTC74?= =?us-ascii?Q?m42NfXsb8rJ5CNMPyghYMiquOAaZ97E2uK43v8ZwedFeP93RA3dzIwtoRXEY?= =?us-ascii?Q?22mga/dDIARs8Auch2cjPdRfnSDSPhwMv5uQm8x3gwo9uEhciRoQ4nqJZ8xm?= =?us-ascii?Q?o4ID7UruryNm8yDr1HmNnXUwqlRBvR7E4Hhw6zhzSrjEUeDu8Rfv4NWARU8A?= =?us-ascii?Q?zebKktQNXNwYD5XNUe7BgDJH4bQ/AiGky3rHxfGV8FddKO1Kf90d3zQANodN?= =?us-ascii?Q?GkRHO198vLi573oahnJQwcXpQarftTi906vuhtTpm5HX1/bOOuCWQOmFBvvS?= =?us-ascii?Q?c15F451Ci3airvD8bVP40UoA9fak4VvjhaSg23AEOV/0cIbMwNo74MXncEku?= =?us-ascii?Q?EHECncjBaNJRnsl6YFxbu2QaYBNHJ9KuF4eocbB8jXrqVtwf9bAqJKA3MPQ2?= =?us-ascii?Q?qRIkqIhg/nZCL6abVnvyOauVp9Q7jL/5oeK1XVz2mInE5hyUuy/wClniDeM1?= =?us-ascii?Q?nuSkATFrEieFGUs8Ph1wWCfWLROY1l6wW8nSIb6JfOy936YW6cGSUG0ZZ1Rg?= =?us-ascii?Q?ZxZXu8sb9Q9tA/keorIXob3ADrpPycjtOPs9J0PpK0SWldy8ysinfqcazF+0?= =?us-ascii?Q?/jS2Gvl8LasQeoDyysgXzB1lJYxgFtClpqLRYOqnrgRgYnuVLhetCNatg6Ro?= =?us-ascii?Q?j02RhpY9oGMn8rIL9tkFKusdPaXxRKIfi+HxHulbrZCE/tmRHdMR+1mVuIz+?= =?us-ascii?Q?Rz9EYYCcpZTU9+qroR9TEa0PfCZN9D+HZ7QIrjscg0jn+8kNKvRGPxZu+cGj?= =?us-ascii?Q?FfdRd5QRHMoGNzZKn24igGeUipPJ15o5lEsxZbnx/VDhb0eclZvQCRWAVnO5?= =?us-ascii?Q?oMLgvSB/1M8ixQZbs0zdoHoIHRsi7/vSENWJ2gz1R24f4vVfJv5E4NjMXzrQ?= =?us-ascii?Q?9s1YDcUqU5uHU9NMmtCIKkMKtCPpZaVRPDgEkwVnjtbbC+tGHynqfNAjPB5k?= =?us-ascii?Q?sKbvVGK4MhCxP3oOU0Bob8oKHyQ8Qrkf9XtSMQuLjAp0jSqEr6lQMnmdC3Xm?= =?us-ascii?Q?5vGrsTEE7F9OYEOM/sK6hIPDN3QIvveIeea7q2trip03l3c6V+IrDiH20W3H?= =?us-ascii?Q?pwP/1L0umAgtGNoDy2Q8audFhPwByBx5v3z9ArPVS4sP+DGZlPe4/KAUwdoL?= =?us-ascii?Q?2I/6QYs2jNH7a5vzZl7p67t885BostbAqWrySjMuSNfIkrpbQVPscpCRvTHu?= =?us-ascii?Q?koW5dls7V21uT3lf62XFQnzndo4qRpajC5nGIVtJYFgENEFaAhYRUqhbnuq6?= =?us-ascii?Q?hdZz0tHbIGOy560uy8ljijv2yi6T3QkhM6EdJsIEzi/+9IL95tNDOKD4ZSy0?= =?us-ascii?Q?PIiPGbNc8PXEqBJtnNvgDwVzcKq9tKi6T6mPQaMURxSq95AYYYxl+gupgQC7?= =?us-ascii?Q?C1fRMkznj7X9wITaTOw=3D?= 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:(13230040)(376014)(7416014)(82310400026)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Sep 2025 18:52:26.7962 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 054106ee-2895-4e22-ed62-08ddff8955a8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000252A3.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4398 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250929_115231_622439_579666CD X-CRM114-Status: GOOD ( 13.02 ) 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 Wed, Sep 24, 2025 at 06:29:12PM -0300, Jason Gunthorpe wrote: > On Mon, Sep 08, 2025 at 04:26:58PM -0700, Nicolin Chen wrote: > > + > > + WARN_ON(new != new_invs->inv + new_invs->num_invs); > > + > > + return new_invs; > > A debugging check that the output list is sorted would be a nice touch > for robustness. Sure. The second for loop generating "new" could run a sanity. > I think this looks OK and has turned out to be pretty simple. > > I've been thinking about generalizing it to core code and I think it > would hold up well there as well? How would you like it to be written in the core: a generalized structure or a general macro that generates driver structures? And potentially we need a new drivers/iommu/iommu-invs.c? Thanks Nicolin