[PATCH 00/14] Add Rust PCI SR-IOV support

[Zhi Wang]

Rust PCI drivers need to enable and disable SR-IOV and share selected
PF-owned functionality with their VF drivers. The shared data must remain
valid while a VF driver is bound, including when the VF driver is in C.

This series builds on Peter Colberg's Rust PCI SR-IOV v3 series [1],
extending it with typed PF registration data and C FFI support. The
registration design follows Danilo Krummrich's Rust vGPU/VFIO PoC [2].
As the discussion on Rust/VFIO support is still ongoing [3], this series
supports both C and Rust sample VF drivers.

Add the PCI SR-IOV operations and callback, managed VF removal during PF
unbind, and typed PF registration data. A pinned registration publishes
the PF payload. Rust VFs borrow the typed data directly; C VFs use an
ABI-checked descriptor and generated C-to-Rust trampolines.

Include Rust and C VF samples and integrate the registration into
nova-core. Nova implements sriov_configure() and publishes PF-readiness
data before VFs are enabled. Document the sharing interface, its borrow
lifetimes and teardown ordering.

[1] https://lore.kernel.org/rust-for-linux/20260303-rust-pci-sriov-v3-0-4443c35f0c88@xxxxxxxxxx/
[2] https://lore.kernel.org/nova-gpu/DLCRZLO06SIO.LS7TWQXIPZSQ@xxxxxxxxxx/
[3] https://lore.kernel.org/nova-gpu/20260914121217.70fa0d93@xxxxxxxxxxx/

John Hubbard (1):
  rust: pci: add is_virtfn(), to check for VFs

Peter Colberg (7):
  PCI: add driver flag to opt into disabling SR-IOV on remove()
  rust: pci: add {enable,disable}_sriov(), to control SR-IOV capability
  rust: pci: add vtable attribute to pci::Driver trait
  rust: pci: add bus callback sriov_configure(), to control SR-IOV from
    sysfs
  rust: pci: add is_physfn(), to check for PFs
  rust: pci: add num_vf(), to return number of VFs
  samples: rust: add Rust SR-IOV VF driver sample

Zhi Wang (6):
  rust: pci: add typed SR-IOV PF registration data
  rust: add C-to-Rust FFI descriptors and trampolines
  rust: pci: add C FFI support to typed SR-IOV PF registration data
  samples: rust: add C SR-IOV VF driver that calls into a Rust PF driver
  gpu: nova-core: publish typed SR-IOV PF data for VF drivers
  Documentation: rust: explain SR-IOV PF data sharing with VFs

 Documentation/rust/index.rst             |   1 +
 Documentation/rust/pci-sriov-pf-data.rst | 330 +++++++++++++++++++++
 MAINTAINERS                              |   4 +
 drivers/gpu/nova-core/driver.rs          |  34 ++-
 drivers/pci/iov.c                        | 103 ++++++-
 drivers/pci/pci-driver.c                 |   3 +-
 drivers/pci/pci.h                        |   2 +
 include/linux/pci.h                      |  44 +++
 include/linux/rust_ffi.h                 |  88 ++++++
 rust/bindings/bindings_helper.h          |   5 +
 rust/kernel/interop.rs                   |   5 +-
 rust/kernel/interop/ffi.rs               | 252 ++++++++++++++++
 rust/kernel/pci.rs                       | 126 ++++++++
 rust/kernel/pci/sriov.rs                 | 355 +++++++++++++++++++++++
 rust/macros/ffi_vtable.rs                | 148 ++++++++++
 rust/macros/lib.rs                       |  90 ++++++
 samples/rust/Kconfig                     |  26 ++
 samples/rust/Makefile                    |   2 +
 samples/rust/rust_dma.rs                 |   1 +
 samples/rust/rust_driver_auxiliary.rs    |   1 +
 samples/rust/rust_driver_pci.rs          |   1 +
 samples/rust/rust_driver_sriov.h         |  27 ++
 samples/rust/rust_driver_sriov.rs        | 270 +++++++++++++++++
 samples/rust/rust_driver_sriov_c_vf.c    |  61 ++++
 24 files changed, 1972 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/rust/pci-sriov-pf-data.rst
 create mode 100644 include/linux/rust_ffi.h
 create mode 100644 rust/kernel/interop/ffi.rs
 create mode 100644 rust/kernel/pci/sriov.rs
 create mode 100644 rust/macros/ffi_vtable.rs
 create mode 100644 samples/rust/rust_driver_sriov.h
 create mode 100644 samples/rust/rust_driver_sriov.rs
 create mode 100644 samples/rust/rust_driver_sriov_c_vf.c


base-commit: 34a8ecc902e907d7b0596a8d38b437e90eac0701