[PATCH v2 01/12] rust: pci: add VFIO override device IDs

[Simon Song <xinmengs@nvidia.com>]

From: Danilo Krummrich <dakr@kernel.org>

VFIO variant drivers need override-only IDs and VFIO-specific module
aliases so userspace can select them for PCI assignment.

Add a DeviceId constructor equivalent to PCI_DRIVER_OVERRIDE_DEVICE_VFIO,
matching a vendor and device without restricting the PCI class.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Signed-off-by: Simon Song <xinmengs@nvidia.com>
---
 rust/kernel/pci.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index d83492e06ce..10864ffda4e 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -206,6 +206,13 @@ macro_rules! module_pci_driver {
 impl DeviceId {
     const PCI_ANY_ID: u32 = !0;
 
+    /// Equivalent to C's `PCI_DRIVER_OVERRIDE_DEVICE_VFIO` macro.
+    pub const fn from_id_vfio_override(vendor: Vendor, device: u32) -> Self {
+        let mut id = Self::from_id(vendor, device);
+        id.0.override_only = bindings::PCI_ID_F_VFIO_DRIVER_OVERRIDE;
+        id
+    }
+
     /// Equivalent to C's `PCI_DEVICE` macro.
     ///
     /// Create a new `pci::DeviceId` from a vendor and device ID.
-- 
2.43.7