Open-IOV vGPU-IO: host-side GSP emulation for unmodified NVIDIA guest drivers https://git.vgpu.io/open-iov.git/atom?h=refactor%2Fhost-gsp-emulation 2026-09-14T02:17:09+00:00 2026-09-14T02:17:09+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-09-14T02:17:09+00:00 urn:sha1:9a7263fce4e3156349a526631805fce66b87fb1b - Implemented nv_vgpu_mdev_register_parent() using mdev_register_parent() API with nv_vgpu_mdev_types array for proper mdev parent registration - Added ioctl NV_VGPU_IOCTL_REGISTER_VGPU_TYPE for userspace vGPU type registration - Created separate header nv-vgpu-vfio-interface-nvidia.h for nvidia.ko with only extern declarations to avoid duplicate symbol exports - Used KBUILD_EXTRA_SYMBOLS to provide only needed symbols (nvidia_vgpu_vfio_*) - Updated create_mdev.sh to use correct mdev type names (pci-nvidia-vgpu-*) - Updated load_vgpu_stack.sh to load open-iov-vfio.ko before nvidia.ko Result: 4 mdev types now show available_instances=8, mdev creation successful 2026-09-13T22:36:21+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-09-13T22:36:21+00:00 urn:sha1:00e54c13c7c9030c4d5f7151467f2d85a3730e29 - Firmware decompilation: GSP 570.144W (28.5MB ELF, RV64IMAC), 132 decompiled C files - Kernel modules: nvidia.ko (34MB, OpenRM), open-iov-vfio.ko (2.8MB, VFIO mdev), gsp-vgpu.ko (1.8MB, guest driver) - Userspace: libiov.so/libvgpu.so (76KB), example_vgpu (28KB), rpc_emulator.c - PCI config space emulation (256B with PM, MSI, MSI-X, PCIe caps) - 12 RPC types fully mapped from firmware decompilation - BAR trap, WPR, scheduling, notification, migration emulation - Helper scripts: load_vgpu_stack, create_mdev, launch_qemu_vgpu, test_vgpu_stack, setup_guest_driver, unload_vgpu_stack - Architecture documentation - Wiki: 10 technical documents - Git LFS for large binaries (.ko, .bin, .iso, .img, .o, ghidra repos) - nvidia-open-gpu-kernel-modules as submodule