Open-IOV: initial public release

Open-IOV virtualizes NVIDIA GPUs so that unmodified guest drivers run with
real GPU functionality - CUDA first, 3D and video to follow - on unmodified
hosts, without a proprietary vGPU license and without patching any driver,
firmware or hypervisor.

Core principle: emulate the interface, pass through the work.

  kernel/     open-iov-vfio.ko - host VFIO mdev driver: virtual GPU device
              (PCI config space, BAR shadows, MSI-X), GSP boot emulation,
              GSP-RM message-queue/RPC emulation, memory model (GPU-VA to
              guest-PA discovery) and the semaphore-completion service that
              advances guest UVM progress.
  userspace/  libiov.so management API and examples.
  tools/      guest diagnostics, firmware analysis wrappers, RM probes.
  scripts/    stack manager, VM harness, build/load/test automation.
  config/     hardware/version profiles (the portability surface).
  docs/       documentation tree - start at docs/README.md.
  wiki/       long-form firmware and protocol deep dives.

Status: initialization works end to end for a stock 570.144 Linux guest on
Turing (TU104): driver probe, nvidia-smi, the full GSP-RM control battery,
object creation and the early CUDA/UVM start-up path. GPU work forwarding -
the step that makes CUDA kernels execute on real hardware - is the active
work item; see docs/04-implementation/01-known-knowns-and-unknowns.md.

License: BSD-3-Clause for the project; GPL-2.0 for kernel modules that link
GPL-only kernel interfaces. See LICENSE and docs/09-reference/legal-and-licensing.md.

1 files changed, 44 insertions, 0 deletions

diff --git a/kernel/Kconfig b/kernel/Kconfig
new file mode 100644
index 0000000..5cee953
--- /dev/null
+++ b/kernel/Kconfig
@@ -0,0 +1,44 @@
+config NVIDIA_VGPU_VFIO
+	tristate "NVIDIA vGPU VFIO Mediated Device Driver"
+	depends on VFIO_MDEV && PCI && IOMMU_API
+	select VFIO_PCI_CORE
+	help
+	  This driver provides VFIO mediated device support for NVIDIA GPUs,
+	  enabling vGPU functionality through the Linux VFIO/mdev framework.
+	  It replaces the proprietary nvidia-vgpu-vfio.ko kernel module.
+
+	  The driver handles:
+	  - VFIO device creation and management
+	  - BAR trapping and emulation
+	  - GSP (GPU System Processor) communication
+	  - Memory mapping and pinning
+	  - IRQFD/IOEVENTFD handling
+	  - Live migration support
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called nvidia-vgpu-vfio.
+
+if NVIDIA_VGPU_VFIO
+
+config NVIDIA_VGPU_VFIO_DEBUG
+	bool "Enable debug logging for NVIDIA vGPU VFIO driver"
+	default n
+	help
+	  Enable verbose debug logging in the NVIDIA vGPU VFIO driver.
+	  This will increase kernel log verbosity significantly.
+
+config NVIDIA_VGPU_VFIO_MIGRATION
+	bool "Enable live migration support"
+	default y
+	help
+	  Enable live migration support for vGPU mediated devices.
+	  This adds the migration ioctl interface and state serialization.
+
+config NVIDIA_VGPU_VFIO_GSP_RPC
+	bool "Enable GSP RPC communication"
+	default y
+	help
+	  Enable communication with the GPU System Processor (GSP)
+	  via RPC for scheduling and resource management.
+
+endif
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