Initial commit: Open-IOV vGPU-IO complete stack

- 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

1 files changed, 36 insertions, 0 deletions

diff --git a/scripts/unload_vgpu_stack.sh b/scripts/unload_vgpu_stack.sh
new file mode 100755
index 0000000..4f57b86
--- /dev/null
+++ b/scripts/unload_vgpu_stack.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# unload_vgpu_stack.sh - Unload vGPU driver stack
+
+set -euo pipefail
+
+BASE_DIR="$OPEN_IOV_ROOT"
+
+echo "=========================================="
+echo "Unloading vGPU Driver Stack"
+echo "=========================================="
+
+# Remove mdev devices first
+echo "Removing mdev devices..."
+for mdev in /sys/bus/mdev/devices/*/; do
+    if [[ -d "$mdev" ]]; then
+        UUID=$(basename "$mdev")
+        echo "  Removing $UUID"
+        echo 1 | sudo tee "$mdev/remove" > /dev/null 2>&1 || true
+    fi
+done
+
+# Unload modules in reverse order
+for mod in gsp_vgpu open_iov_vfio nvidia; do
+    if lsmod | grep -q "^$mod "; then
+        echo "Unloading $mod.ko..."
+        sudo rmmod "$mod" 2>/dev/null || echo "  WARNING: $mod still in use"
+    else
+        echo "$mod.ko not loaded"
+    fi
+done
+
+echo ""
+echo "=========================================="
+echo "Driver Stack Unloaded"
+echo "=========================================="
+lsmod | grep -E "nvidia|open_iov|gsp_vgpu" || echo "No vGPU modules loaded"
\ No newline at end of file