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Mon, 15 Jun 2026 13:19:05 -0700 Date: Mon, 15 Jun 2026 13:19:03 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: Will Deacon , Kevin Tian , "Robin Murphy" , Joerg Roedel , Shuah Khan , Pranjal Shrivastava , Kees Cook , Yi Liu , Eric Auger , , , , Subject: Re: [PATCH v1 4/4] iommu/arm-smmu-v3: Process vIOMMU invalidations in batches Message-ID: References: <00748c5cbea95a938d032269001a598203b06bbc.1780521606.git.nicolinc@nvidia.com> <20260612135409.GI1962447@nvidia.com> <20260615134301.GL1962447@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20260615134301.GL1962447@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB71:EE_|CY3PR12MB9704:EE_ X-MS-Office365-Filtering-Correlation-Id: 9e1cdcc1-5d9d-40bd-5a2b-08decb1b66e8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|7416014|376014|23010399003|36860700016|18002099003|22082099003|4143699003|11063799006|3023799007|56012099006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: OTuADnAWqCujVdaQ2Qj0ndpZqyw2iVelikOIZ8oAG7f+SmCHpOoVmyTAiOd0HzQuoLV784rjsK3bHl/CEBpXcK6zzEXcG/KA00Nad3L6fCyDcA/fymIjuW/PhYSVQNnvQ93XUvbSusdN9UOaEa064whIURFd0tfq8kCjtHsFt97K5ZB5s1CtMGbnBc9oT5s4rO6JPGOdiPJtHDRHv6GqvB+CrjCa4ZNULYTLCiGyKdqw/1WPz4xwXxIvkasoZ5fCkh88ZlJqOvMspCzPvk4PWFtx8WkPVwOfOixdZPnw4otHt1wOD/N3PcUUcz0jLlmRw6/tWp01ex9YJHxxuiBhrKqC7yvrjVLObe8tGNREndSz0rqflhnIsNiQzaQ+pmFbPiKJz+k+diEDp9qW69JHT2UrLFkumSou4IiC5Jga1HtMbVgVldp8/vsN0oc/Fs5V X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jun 2026 20:19:28.2179 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9e1cdcc1-5d9d-40bd-5a2b-08decb1b66e8 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: BL6PEPF0001AB71.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9704 On Mon, Jun 15, 2026 at 10:43:01AM -0300, Jason Gunthorpe wrote: > On Fri, Jun 12, 2026 at 12:11:10PM -0700, Nicolin Chen wrote: > > > VMM would have to know which command failed, to flag it in the CONS > > register, indicating: a) commands prior to the CONS are issued, and > > b) command pointed by the CONS is illegal. > > It is a VMM bug to send a malformed command into the kernel in the > first place. OK. I will follow that. Thanks Nicolin