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Tue, 7 Jul 2026 18:41:24 -0700 Date: Tue, 7 Jul 2026 18:41:23 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: , "Joerg Roedel (AMD)" , Jean-Philippe Brucker , , Robin Murphy , Will Deacon , David Matlack , "Pasha Tatashin" , , "Pranjal Shrivastava" , Samiullah Khawaja , Mostafa Saleh Subject: Re: [PATCH v2 7/8] iommu/arm-smmu-v3: Change how the tlbi describes the invalidation Message-ID: References: <0-v2-43074a57a53a+fb95-smmu_tlbi_jgg@nvidia.com> <7-v2-43074a57a53a+fb95-smmu_tlbi_jgg@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <7-v2-43074a57a53a+fb95-smmu_tlbi_jgg@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E61:EE_|SJ0PR12MB5662:EE_ X-MS-Office365-Filtering-Correlation-Id: 106c5f17-3756-4452-1a4d-08dedc9219e8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|23010399003|7416014|82310400026|1800799024|376014|11063799006|56012099006|4143699003|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 7DimH9W+PyByGhb1IOECtDKhvKTpbwNyxK+5tKkTvZfecNxaBhnpKIT7gc/G08J7y/U2zULtm72KXRj7dWChuSsDUrejspQx3JVYJzei3Nt9c7JOHl/Om5KgkW7Vsmbtu3U34dyBZaTHdo867DFfuwdmeIKzF90nzi+fMS1hW9vKwAcLPlIa+ibpfbtpeTyPsM0DmfsUNa2uMF/7cMn3bCdBllK+0kyskg43wSiMy7/3XbcphUDqCZbITsZQb5K1rIeWjUUH9jmIWtroaunBA+IMjYdikL3ZviehF12ygCYManwZWwQyrkwVbJn+RKjVtO+9bhK7tCIol1rQUq4hqo8jiag2hVvmXUc44IZqyGaANDk5m8DrCUxHjFhLIygDmsUqB0sx1kbV8bRAmU7eAMIueto5/XYrKg9vqp77uFUk6OAKMHvWt3+cIX8pMZgA X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2026 01:41:58.9780 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 106c5f17-3756-4452-1a4d-08dedc9219e8 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: CO1PEPF00012E61.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5662 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260707_184212_411132_81620643 X-CRM114-Status: GOOD ( 13.44 ) 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, Jul 06, 2026 at 01:26:44PM -0300, Jason Gunthorpe wrote: > @@ -2331,8 +2331,8 @@ static struct arm_smmu_cmd arm_smmu_atc_inv_to_cmd(u32 sid, int ssid, > * This has the unpleasant side-effect of invalidating all PASID-tagged > * ATC entries within the address range. > */ > - page_start = tlbi->iova >> inval_grain_shift; > - page_end = (tlbi->iova + tlbi->size - 1) >> inval_grain_shift; > + page_start = tlbi->start >> inval_grain_shift; > + page_end = tlbi->last >> inval_grain_shift; arm_smmu_domain_inv() in the header passes in start=last=0, but it's supposed to flush the entire ATC, right? > static void arm_smmu_iotlb_sync(struct iommu_domain *domain, > struct iommu_iotlb_gather *gather) > { > + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); > + unsigned int tg = smmu_domain->tgsz_lg2; > struct arm_smmu_tlbi tlbi = { > - .smmu_domain = to_smmu_domain(domain), > - .iova = gather->start, > - .size = gather->end - gather->start + 1, > - .iopte_granule = gather->pgsize, > - .leaf_only = true, > + .smmu_domain = smmu_domain, > + .start = gather->start, > + .last = gather->end, > + .leaf_levels_bitmap = [...] > + BIT((ilog2(gather->pgsize) - tg) / (tg - 3)), > }; > > if (!gather->pgsize) pgsize=0 is checked after ilog2(0). Thanks Nicolin