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.

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+BSD 3-Clause License
+
+Copyright (c) 2026, The Open-IOV Project
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+---
+
+Note on the license change
+==========================
+
+Open-IOV is distributed under the BSD 3-Clause License. This is a deliberate
+choice for a project whose mission is *adversarial interoperability*: the
+widest possible reuse, including in commercial products, is a feature, not an
+accident. A permissive license lets hardware vendors, hypervisor vendors,
+integrators and other open source projects adopt, ship and co-develop this
+software without license friction, which is exactly how an independent,
+durable IP block for GPU virtualization should spread.
+
+Contributions are accepted under the same terms (inbound = outbound).
+
+Mixed licensing: kernel modules are GPL-2.0
+===========================================
+
+The Linux kernel exports many of the interfaces this project depends on
+(VFIO, mdev, IOMMU, workqueue and DMA internals) under `EXPORT_SYMBOL_GPL`.
+To use those symbols legally, **kernel modules may be licensed GPL-2.0**.
+The policy is therefore:
+
+| Component | License | Why |
+|---|---|---|
+| `kernel/**` (e.g. `open-iov-vfio.ko`) | **GPL-2.0** (`MODULE_LICENSE("GPL v2")`) | Uses GPL-only kernel exports (VFIO/mdev/IOMMU). |
+| `userspace/**`, `tools/**`, `scripts/**`, `config/**`, `docs/**` | **BSD-3-Clause** | No GPL-only interfaces; maximize reuse. |
+| Third-party imports (vendor firmware, submodules, study material) | their own terms | Used for interoperability study; not relicensed. |
+
+**Per-file SPDX identifiers always govern.** If a file carries
+`SPDX-License-Identifier: GPL-2.0` it is GPL-2.0, even if it lives outside
+`kernel/`. Otherwise the project default is BSD-3-Clause.
+
+This split is intentional and stable: it gives the kernel side a clean legal
+footing and keeps every reusable, vendor-facing, embeddable part of the
+project permissive.
+
+Third-party components
+======================
+
+* Vendor firmware images and third-party software referenced by this project
+  are **not** covered by this license; they keep their own terms and are used
+  for interoperability study. See `docs/09-reference/legal-and-licensing.md`.
+* Linux kernel headers are used under their own license (GPL-2.0) and are not
+  redistributed by this project.
+