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Mon, 21 Sep 2026 10:49:41 -0700 From: Jamie Nguyen To: Hanjun Guo CC: Lorenzo Pieralisi , Sudeep Holla , Catalin Marinas , "Will Deacon" , "Rafael J. Wysocki" , Len Brown , Dat Mach , , , Subject: Re: [PATCH v2 1/3] firmware: arm_ffa: Split the response out of ffa_msg_send_direct_req2() Date: Mon, 21 Sep 2026 10:49:40 -0700 Message-ID: <20260921174941.2406319-1-jamien@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <348dfed7-6aa2-77a2-a0a9-3aeed22f46b8@huawei.com> References: <20260901192906.133670-1-jamien@nvidia.com> <20260901192906.133670-2-jamien@nvidia.com> <348dfed7-6aa2-77a2-a0a9-3aeed22f46b8@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0002992B:EE_|DS3PR12MB086197:EE_ X-MS-Office365-Filtering-Correlation-Id: 49609326-cbb2-4ba9-bf30-08df1808c177 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|7416014|376014|36860700016|82310400026|10067099003|11063799006|4143699003|56012099006|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(23010399003)(7416014)(376014)(36860700016)(82310400026)(10067099003)(11063799006)(4143699003)(56012099006)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: zdmKmly1dVyjIQ4lG8/hCiza1/DOMUybpRxyUM4Z8cN91vFlJ86PYlL3ZksA2O7UWYpjaVgwVl4nhF0b8YOtVOZRLT9OSuKFgNqVls34xnypI/KPXhyloTMg4fGZgJHid4D6Axd4Ykpaw4e++MoD6XXRQMI7jQJ/DIFx5wviYRVr30HqqYJsK8TWBSv66xufUYgo62HxZp268FQF1HcVJ0DAaW8wrBF1njyT0CXhAn0lE5pf4g27YmqMWPE3T2GBf27nPejGK3bXxLu1+DSU4LNuHEUShN1n7Px8ESzmQCYTsIvF6usjbWEMFlp+J2T/p6FqQMVOZUvC1owpiiygJnuNC3I2l5mf8AbUz4Cd2nVB2tl6CLpYUpws/Xzx3lYldMGw7BzdSx1J1VYyqzzpY19cbwWLY4tVRvGAK0Ev7nK6REyIuJ+wPuS4OjY9Qs5U X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Sep 2026 17:49:59.2679 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 49609326-cbb2-4ba9-bf30-08df1808c177 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: BL02EPF0002992B.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS3PR12MB086197 > The kernel document was updated for this, please update the > rest of two patches as well. I'll update all three patches to use: Assisted-by: LLM > As you noted in the cover letter, the AML thread will stall here if no > response, block the ACPI interpreter and the ACPI global lock when > the field is Lock-flagged, so do we have some warnings if that happened? There's no warning today. Would a rate-limited warning after a prolonged wait be useful here? I'm hesitant because that would also affect non-ACPI callers of this helper, and I don't believe FF-A defines a threshold after which the wait is abnormal. > resp_regs[1] is confusing, comment here it links to X1 register > is better. I'll clarify that resp_regs[1] is X2; resp_regs[0] is X1. I'll address these in v3. Thanks!