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, 36 insertions, 0 deletions

diff --git a/scripts/unload_vgpu_stack.sh b/scripts/unload_vgpu_stack.sh
new file mode 100755
index 0000000..e02474a
--- /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="${OPEN_IOV_ROOT:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"
+
+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