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Thu, 28 May 2026 15:04:00 -0700 Date: Thu, 28 May 2026 15:03:58 -0700 From: Nicolin Chen To: Pranjal Shrivastava CC: , Will Deacon , Joerg Roedel , Robin Murphy , Jason Gunthorpe , Mostafa Saleh , Daniel Mentz , Ashish Mhetre , Subject: Re: [PATCH v7 05/11] iommu/arm-smmu-v3: Cache and restore MSI config Message-ID: References: <20260527221407.1756491-1-praan@google.com> <20260527221407.1756491-6-praan@google.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: MWH0EPF000C6186:EE_|BL1PR12MB5897:EE_ X-MS-Office365-Filtering-Correlation-Id: db5d1b73-bafb-416f-e4a4-08debd0511b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|1800799024|36860700016|11063799006|4143699003|18002099003|56012099006|22082099003; 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)(376014)(82310400026)(1800799024)(36860700016)(11063799006)(4143699003)(18002099003)(56012099006)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: QyKaxS72xgu4uhvXKsQwbyXtOcfUx9jFlMlM3U6QxxxLSrtzvkSPwP5/aqDVVVsjYcgobkQ79Xrs1KrelbEXKLqROmsHSPWngAfQIRikFVKxso++rRvWiFHTYgJPPu9h/r+eT1XBNHUyNsZ8vLjTNDs8Oc7uUv3YvSagbXJp+DcU795RiIX0xTzBSObPut3hE2RfBPcpEYB0rJ7eyEvOgWCi7LZVOkcZ9V2uv6jM/49R4CUDxl6gFwPqibzeiY9/mf21AI6zzGulEsI9JcIlwxq7w8/ubVsXZ9I2C1O1cc/TXWM1z1ykOAfzP/dOJ5Pz0c24drcS5jBIRQ3/q3qXg8lXi3kFfe9UTZg9mtoPW3bftRRXT9h4HjfzxReLqcZeBEk6kXfoDXW5SBYGOvB6yYj324yDSc2pNMDo/r1unBgc+XNUaAi1PytPEi8MkyuF X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 May 2026 22:04:20.1084 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: db5d1b73-bafb-416f-e4a4-08debd0511b0 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: MWH0EPF000C6186.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5897 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260528_150430_079031_3F738F34 X-CRM114-Status: GOOD ( 13.70 ) 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 Thu, May 28, 2026 at 09:57:04PM +0000, Pranjal Shrivastava wrote: > On Thu, May 28, 2026 at 11:36:06AM -0700, Nicolin Chen wrote: > > On Wed, May 27, 2026 at 10:14:01PM +0000, Pranjal Shrivastava wrote: > > > + get_cached_msi_msg(irq, &msg); > > > > I wonder if we could use __get_cached_msi_msg() since we got desc? > > We could've (and that's a nice suggestion), but unfortunately it > (__get_cached_msi_msg) is not exported via EXPORT_SYMBOL_GPL() :( > We could break modular builds as CONFIG_ARM_SMMU_V3 is tristate. > > Let me know if you have a strong preference about exporting it, we can > add a patch in the next versions. Not necessary. I see all drivers use get_cached_msi_msg() too. Nicolin