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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: d7lepq/zECbr4FZrOIRPOTlR3OVgVtcGQuQZ7CU5Silf8RLkGUy3D8v7i6PXCdUrtJu0L1E4Ym07/0ByOllD7Rvyp/xZijNELjGyxRwV5pa6Ue6qTLvdkaOOcTOyzpwxe4s0LCyN+JL8Au4GwleXDWm2BOyVlJV7yE6lQRGED6l9WW6Eez0IR5uZiOAS4LYkLPwm+5XNCC9QVjgs2zhxvIX9oyyEvBqOt6fsI6re90sJUFO42Lex7ACC2Blb7WkZvXVxd7zDAhMavgzYwjjp2IIWdf2RKpp/mtriysES0555E03F853HgrmtSLqY4hJwrOeDM/yCrwVJ6bPzXnoQRu7U8ztC/F2pp7NW3V6lCuEYwA5Cqtg3PypUlGGJL6OhDpujwrXgXcos1d9Ltu9KcZvy9h0x0agJ1bkjW+Austsh776MIgdbz0RJqkEtFgfw X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Oct 2026 15:41:00.6872 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 424304c6-555c-4f80-955a-08df311c0a0f 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: CO1PEPF00018860.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS6PR12MB140904 From: Danilo Krummrich VFIO manages DMA ownership through the userspace IOMMU interface. Its PCI variant drivers must opt out of the driver's default DMA domain. Add Driver::DRIVER_MANAGED_DMA and pass it to the PCI core. Existing Rust PCI drivers keep the default setting. Signed-off-by: Danilo Krummrich Signed-off-by: Zhi Wang Signed-off-by: Simon Song --- rust/kernel/pci.rs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 10864ffda4e..a156927e23d 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -108,6 +108,7 @@ unsafe fn register( (*pdrv.get()).probe = Some(Self::probe_callback); (*pdrv.get()).remove = Some(Self::remove_callback); (*pdrv.get()).id_table = T::ID_TABLE.as_ptr(); + (*pdrv.get()).driver_managed_dma = T::DRIVER_MANAGED_DMA; #[cfg(CONFIG_PCI_IOV)] if T::HAS_SRIOV_ENABLE { (*pdrv.get()).sriov_configure = Some(Self::sriov_configure_callback); @@ -345,6 +346,9 @@ pub trait Driver { /// The table of device ids supported by the driver. const ID_TABLE: IdTable; + /// Whether the driver manages DMA ownership instead of using the default DMA domain. + const DRIVER_MANAGED_DMA: bool = false; + /// PCI driver probe. /// /// Called when a new pci device is added or discovered. Implementers should -- 2.43.7