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Tue, 28 Apr 2026 20:55:35 -0700 Date: Tue, 28 Apr 2026 20:55:33 -0700 From: Nicolin Chen To: , , , CC: , , , , , , , , , Subject: Re: [PATCH rc v3 0/5] iommu/arm-smmu-v3: Fix device crash on kdump kernel Message-ID: References: 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: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003448:EE_|SAVPR12MB999143:EE_ X-MS-Office365-Filtering-Correlation-Id: b637aa3f-cc26-40aa-979e-08dea5a3317a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|376014|82310400026|36860700016|13003099007|18002099003|56012099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(1800799024)(376014)(82310400026)(36860700016)(13003099007)(18002099003)(56012099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: oTcH4O15e9vXAtu216ThpgDK7U1mco9ha9AagU3AGUJ/uJSHlK16d1RNstTv4a3OlRGQtichTZRk22Tq62Lf2CTzpO3lIEyw05dauzsxA9pMb6j/eNa1mIkQtvPb03pN5NnMsfhaOia4aFg22JgMgVyc3q/a66S2FeNpIeT8uJeyQlXMBG82dsuoHYGs2FIH62lcaf3ZM/dIze9RtLOXCX5eybJeEWiwXQJBJ+HrVx1nA3KBDxL8CZDVpOPIPtfHz92rx8LT4MG1o5o119AInTCvzTrNh17frQTu2NLkxmAvoVhTWdG9zVo2o3BDzmSZ3Q9YHNFpPwhuH3e1vyboaHkfLQdwb2X0JFzxCRo26w/VeKQtq+h1O/hAwtWEsI6dSsAOmnAXo4bwKU1zLE+G+ppNM2fwWf/fkUa/KSP1C+r2DlQ4Zb40BkcBh1Rv65QW X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Apr 2026 03:55:46.0037 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b637aa3f-cc26-40aa-979e-08dea5a3317a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF00003448.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SAVPR12MB999143 On Sat, Apr 25, 2026 at 02:30:45PM -0700, Nicolin Chen wrote: > This is on Github: > https://github.com/nicolinc/iommufd/commits/smmuv3_kdump-v3 > > Changelog > v3 > * s/OPT_KDUMP/OPT_KDUMP_ADOPT > * Do not adopt if GERROR_SFM_ERR > * Retain CR0_ATSCHK beside CR0_SMMUEN > * Clear latched GERROR bits (e.g. CMDQ_ERR) > * Assert ARM_SMMU_FEAT_COHERENCY in adopt functions > * Add STE.Cfg check in arm_smmu_is_attach_deferred() > * Fix validations on return codes from devm_memremap() > * Sanitize crashed kernel register values in adopt functions > * Drop unnecessary l2ptrs guard in arm_smmu_is_attach_deferred() > * Don't enable PRIQ/EVTQ irqs and guard the irq functions for combined > irq cases https://sashiko.dev/#/patchset/cover.1777150307.git.nicolinc%40nvidia.com Sashiko pointed out a few more comments on v3. Most of them are interesting to address. I have made some updates to the series and will send v4 after a final check. Thanks Nicolin