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Tue, 15 Sep 2026 13:57:41 -0700 From: Zhi Wang To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Alistair Popple , Joel Fernandes , Peter Colberg , Zhi Wang Subject: [PATCH 05/14] rust: pci: add is_virtfn(), to check for VFs Date: Tue, 15 Sep 2026 23:56:49 +0300 Message-ID: <20260915205659.76841-6-zhiw@nvidia.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260915205659.76841-1-zhiw@nvidia.com> References: <20260915205659.76841-1-zhiw@nvidia.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: CO1PEPF000075EF:EE_|SJ0PR12MB6735:EE_ X-MS-Office365-Filtering-Correlation-Id: 42a4dec5-6f37-4c7f-4e5b-08df136c0d83 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|82310400026|36860700016|1800799024|376014|7416014|10067099003|6133799003|22082099003|18002099003|56012099006|11063799006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: vrLYx5HY8n4PZ/IgSNrqqQcqEhHimZHBVyCDyTV7+dEKNzc10XpyroZH4iC8daTLDrUubM/wQwNZAuxh0LFVdhSF6fG2xAoTNMzn+WDJPQbcnmTM3RzcFp78MKKjR2ktKvjkZc/KIKD0PhuLNY4VrJ2QHJ54G1wXPTOCz98shv8tkWPIiOplQW6H8b5mE6D/qExDrcaQ+GSX3DMDOkt8afNXx9XBL0XHtiyXkqdM2offehmCbvT5AvhltdGpz6CB4CP7C/tiIB/utYzPx5TPYmuFEAkBJNJFsEGsOygQdIq7E32LCvywVm7SPEcQ9gT3fJPl5lP9og2wB2DZkM/UtmQYMBd7D5GYZBP++G07u+Q2mbZuWaLbyIhaq1yBeoSywmgVWgPe/1/ICFieIAwMXwNmadkaxJ1G0e5H9cV/0kwPjXJVBkte6rlJb+QkdhXT X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2026 20:58:11.2980 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 42a4dec5-6f37-4c7f-4e5b-08df136c0d83 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: CO1PEPF000075EF.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6735 From: John Hubbard Add a method to check if a PCI device is a Virtual Function (VF) created through Single Root I/O Virtualization (SR-IOV). Signed-off-by: John Hubbard Reviewed-by: Alistair Popple Reviewed-by: Joel Fernandes Signed-off-by: Peter Colberg Signed-off-by: Zhi Wang --- rust/kernel/pci.rs | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 7f50c1c96a4f..844d73a83670 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -507,6 +507,14 @@ pub fn resource_start(&self, bar: u32) -> Result { Ok(unsafe { bindings::pci_resource_start(self.as_raw(), bar.try_into()?) }) } + /// Returns `true` if this device is a Virtual Function (VF). + #[inline] + #[expect(dead_code)] + pub(crate) fn is_virtfn(&self) -> bool { + // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`. + unsafe { (*self.as_raw()).is_virtfn() != 0 } + } + /// Returns the size of the given PCI BAR resource. pub fn resource_len(&self, bar: u32) -> Result { if !Bar::index_is_valid(bar) {