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, 65 insertions, 0 deletions

diff --git a/tools/vm/launch_vgpu_qemu.sh b/tools/vm/launch_vgpu_qemu.sh
new file mode 100755
index 0000000..0355ef1
--- /dev/null
+++ b/tools/vm/launch_vgpu_qemu.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+# QEMU launch script for NVIDIA vGPU testing
+# This script assumes:
+# 1. nvidia-vgpu-vfio.ko is loaded on host (with dry_run=1 for testing)
+# 2. An mdev device has been created via sysfs
+# 3. Guest OS has NVIDIA vGPU guest driver installed
+
+set -euo pipefail
+
+# Configuration
+MDEV_UUID="${MDEV_UUID:-$(cat /proc/sys/kernel/random/uuid)}"
+VGPU_TYPE="${VGPU_TYPE:-nvidia-vgpu-turing}"  # or ampere, hopper, pascal
+QEMU_BIN="${QEMU_BIN:-qemu-system-x86_64}"
+GUEST_IMG="${GUEST_IMG:-/var/lib/libvirt/images/ubuntu-vgpu.qcow2}"
+GUEST_KERNEL="${GUEST_KERNEL:-/boot/vmlinuz-$(uname -r)}"
+GUEST_INITRD="${GUEST_INITRD:-/boot/initrd.img-$(uname -r)}"
+
+# PCI address of the NVIDIA GPU (TU104: 10de:1ed3)
+GPU_PCI_ADDR="${GPU_PCI_ADDR:-0000:01:00.0}"
+
+echo "=== NVIDIA vGPU QEMU Launch Script ==="
+echo "MDEV UUID: $MDEV_UUID"
+echo "VGPU Type: $VGPU_TYPE"
+echo "GPU PCI: $GPU_PCI_ADDR"
+echo ""
+
+# Check if mdev device exists
+MDEV_PATH="/sys/bus/mdev/devices/$MDEV_UUID"
+if [[ ! -d "$MDEV_PATH" ]]; then
+    echo "ERROR: mdev device $MDEV_UUID not found"
+    echo ""
+    echo "To create an mdev device (requires NVIDIA vGPU host driver):"
+    echo "  echo $MDEV_UUID > /sys/bus/pci/devices/$GPU_PCI_ADDR/mdev_supported_types/$VGPU_TYPE/create"
+    echo ""
+    echo "For dry-run testing without host driver, this script will not work for actual QEMU launch."
+    echo "The kernel module loads in dry-run mode but cannot create real mdev devices."
+    exit 1
+fi
+
+# Get the mdev device's VFIO group
+VFIO_GROUP=$(basename $(readlink -f "$MDEV_PATH/iommu_group"))
+VFIO_DEV="/dev/vfio/$VFIO_GROUP"
+
+if [[ ! -e "$VFIO_DEV" ]]; then
+    echo "ERROR: VFIO device $VFIO_DEV not found"
+    exit 1
+fi
+
+echo "Using VFIO device: $VFIO_DEV"
+echo ""
+
+# QEMU command
+exec $QEMU_BIN \
+    -name "vgpu-guest" \
+    -enable-kvm \
+    -cpu host,host-passthrough=on \
+    -smp 4,sockets=1,cores=4,threads=1 \
+    -m 8G \
+    -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/$MDEV_UUID,display=on,x-igd-opregion=on \
+    -device virtio-net-pci,netdev=net0 \
+    -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+    -drive file=$GUEST_IMG,if=virtio,format=qcow2 \
+    -display gtk,gl=on \
+    -vga none \
+    "$@"