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+# NVIDIA open-gpu-kernel-modules Patches
+
+Open-IOV does **not** vendor the NVIDIA OpenRM source tree. Instead, the
+installer clones upstream at a pinned tag and applies this patch series.
+
+## Pinned upstream
+
+- Repository: <https://github.com/NVIDIA/open-gpu-kernel-modules.git>
+- Tag: `610.57.04`
+- Pristine-tree SHA256 of the delta base: tag `610.57.04`
+
+## Applying
+
+```bash
+git clone --depth 1 --branch 610.57.04 \
+    https://github.com/NVIDIA/open-gpu-kernel-modules.git
+cd open-gpu-kernel-modules
+git apply /path/to/open-iov/patches/nvidia/*.patch
+```
+
+(`install.sh` does this automatically.)
+
+## Regenerating the series
+
+If you modify the NVIDIA tree, regenerate the patches with:
+
+```bash
+cd nvidia-open-gpu-kernel-modules
+git format-patch 610.57.04..HEAD -o ../patches/nvidia/
+```
+
+## What the series does
+
+`0001-Build-fixes-and-vGPU-VFIO-interface-integration.patch`:
+
+- Adds the vGPU VFIO interface headers (`nv-vgpu-vfio-interface.h`,
+  `nv-vgpu-vfio-interface-nvidia.h`) that `open-iov-vfio.ko` and
+  `nvidia.ko` share.
+- Exports the vGPU VFIO symbols from `nvidia.ko`
+  (`nvidia_vgpu_vfio_probe/remove`, `nvidia_vgpu_vfio_get_ops/set_ops`,
+  `nv_vgpu_mdev_register_parent/unregister_parent`, ...).
+- Reports version `570.144` to match the GSP firmware the guest driver
+  stack is validated against.
+- Build fixes for kernel 6.8 out-of-tree builds and the
+  `Module.symvers.open-iov` reference list.