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Tue, 2 Jun 2026 13:35:52 -0700 Date: Tue, 2 Jun 2026 13:35:51 -0700 From: Nicolin Chen To: Will Deacon CC: Ashish Mhetre , , , , , , , Subject: Re: [PATCH v3 3/3] iommu/arm-smmu-v3: Issue CFGI/TLBI twice on Tegra264 Message-ID: References: <20260601104845.995005-1-amhetre@nvidia.com> <20260601104845.995005-4-amhetre@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D1:EE_|PH0PR12MB7959:EE_ X-MS-Office365-Filtering-Correlation-Id: 7cbbed54-5cfa-4ece-2e98-08dec0e69b61 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|1800799024|36860700016|13003099007|22082099003|18002099003|56012099006|4143699003|11063799006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(376014)(1800799024)(36860700016)(13003099007)(22082099003)(18002099003)(56012099006)(4143699003)(11063799006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: WNutYPjyVIko+XZ+iVD3LdmTy3ExF3wUFR9CPE906wKXWNpZwspnBzs/pvNIFtAuxSmzWA/lc1iYgPbr2B9vgQcixpz9W6z55IHPwuLjqFItNkEnpjx2jRdhtQUwXGHAkOLGaeMCgLeiiSetQdnkvGDQOwwY0HYs9bW7lMxn+j96ErtIcSvAb0q3q8uJyCsDcdMC3FlB+IPM71uSVCSpSCVZM8QP/DWmehlhSNamAc/HwA1Hu38/9ru7oKfMFTO8L7yYn2FxDOGe7CEDeE53r2N1nHPCmmTU28suOiYeiOOCfQZuXnDNfqrC4Ws+OngXirBPU5/tfWXtuOg29TmyCnIk8dUsvH8GKkawqrxqgXaSAr/4cAsIVwnWItxF/xsQ8JlIi6pNEbyDRX3VgvX1R6/OD0B3eBE/u3UacvFd+tOWNpHyEdUb1gly3JV53Hvu X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2026 20:36:21.3891 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7cbbed54-5cfa-4ece-2e98-08dec0e69b61 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D1.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7959 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260602_133631_345899_3C838C13 X-CRM114-Status: GOOD ( 12.76 ) 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 Tue, Jun 02, 2026 at 09:22:15PM +0100, Will Deacon wrote: > On Mon, Jun 01, 2026 at 10:48:45AM +0000, Ashish Mhetre wrote: > > @@ -382,7 +402,8 @@ int arm_vsmmu_cache_invalidate(struct iommufd_viommu *viommu, > > > > /* FIXME work in blocks of CMDQ_BATCH_ENTRIES and copy each block? */ > > cur++; > > - if (cur != end && (cur - last) != CMDQ_BATCH_ENTRIES - 1) > > + if (cur != end && (cur - last) != CMDQ_BATCH_ENTRIES - 1 && > > + arm_vsmmu_can_batch_cmd(smmu, last, cur)) > > continue; > > FYI: Sashiko is unhappy with the existing code here, so somebody should > check that out: > > https://sashiko.dev/#/patchset/20260601104845.995005-2-amhetre@nvidia.com Ack. I will submit a separate patch to address this. Nicolin