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Fri, 6 Mar 2026 15:45:32 -0800 Date: Fri, 6 Mar 2026 15:45:30 -0800 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , Subject: Re: [PATCH RFTv1 1/3] iommu/arm-smmu-v3: Drain in-flight fault handlers Message-ID: References: <20260306231213.GA3717316@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20260306231213.GA3717316@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB50:EE_|IA0PR12MB7579:EE_ X-MS-Office365-Filtering-Correlation-Id: d412c050-2d81-4bc6-5ad7-08de7bda80c3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|82310400026|36860700016; 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)(1800799024)(7416014)(376014)(82310400026)(36860700016);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 5lZLyKVy6+NscKpeFlpLf164Yb0IHGm1LdYjwdG1VAGCgLEvlnz9ydyGZMpfuI7So4+UwB//EU9y5VmvGlqH5Fh2/cuUC7lW/WrX8INoa10orWWCMkl18abkP9KTOHJpe+d9dL7fRhKQ6iskwY3yG+fBR3ekopYgsFuPrWVhetG2PRa3J9swHh4izBfJRPsb8BggM97VM0BET2AWsRPPlkjmWRVSaVIaCYlECE4aGPoYDsDF4siNWphGlTpIjUhSZhquoZFV5sPBKg41tNDJKsgD0if3dE0KiTOtZV6zrstENiJyTJpJVD1wnnXQCEaxy+Tt5WdgpTvBOC/LPyLC3vX0mj5JTQNOTnKo8otooT51qXfg7jLdfGK4SdQ96zBWMF1QryT/mvT2WTDtXkg4oRi7gTj9jKKYdfSwfo3fop8gbQLpVSs+4liYnFUPIACJ X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Mar 2026 23:45:52.4760 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d412c050-2d81-4bc6-5ad7-08de7bda80c3 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: BL6PEPF0001AB50.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7579 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260306_154601_558905_4C32AD59 X-CRM114-Status: GOOD ( 12.47 ) 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 Fri, Mar 06, 2026 at 07:12:13PM -0400, Jason Gunthorpe wrote: > On Tue, Mar 03, 2026 at 12:13:05PM -0800, Nicolin Chen wrote: > > From: Malak Marrid > > > > When a device is switching away from a domain, either through a detach or a > > replace operation, it must drain its IOPF queue that only contains the page > > requests for the old domain. > > > > Co-developed-by: Barak Biber > > Signed-off-by: Barak Biber > > Co-developed-by: Stefan Kaestle > > Signed-off-by: Stefan Kaestle > > Signed-off-by: Malak Marrid > > Signed-off-by: Nicolin Chen > > --- > > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 11 ++++++++++- > > 1 file changed, 10 insertions(+), 1 deletion(-) > > Isn't this an existing bug in the stall handling? Hmm, right. I will make it a bug fix. Thanks Nicolin