1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
#!/bin/bash
# launch_qemu_vgpu.sh - Launch QEMU with NVIDIA vGPU mediated device
# Usage: ./launch_qemu_vgpu.sh [MDEV_UUID] [GUEST_IMAGE] [OPTIONS]
set -euo pipefail
MDEV_UUID="${1:-}"
GUEST_IMAGE="${2:-/var/lib/libvirt/images/ubuntu-22.04.qcow2}"
shift 2 || true
EXTRA_QEMU_ARGS=("$@")
# Find mdev device if UUID not specified
if [[ -z "$MDEV_UUID" ]]; then
echo "Scanning for available mdev devices..."
mapfile -t MDEVS < <(find /sys/bus/mdev/devices -maxdepth 1 -name "????????-????-????-????-????????????" -printf "%f\n" 2>/dev/null)
if [[ ${#MDEVS[@]} -eq 0 ]]; then
echo "ERROR: No mdev devices found. Run create_mdev.sh first."
exit 1
elif [[ ${#MDEVS[@]} -eq 1 ]]; then
MDEV_UUID="${MDEVS[0]}"
echo "Auto-selected mdev: $MDEV_UUID"
else
echo "Multiple mdev devices found:"
for i in "${!MDEVS[@]}"; do
MDEV="${MDEVS[$i]}"
TYPE=$(cat "/sys/bus/mdev/devices/$MDEV/mdev_type/name" 2>/dev/null || echo "unknown")
echo " [$i] $MDEV ($TYPE)"
done
read -p "Select mdev [0-$((${#MDEVS[@]}-1))]: " idx
MDEV_UUID="${MDEVS[$idx]}"
fi
fi
MDEV_PATH="/sys/bus/mdev/devices/$MDEV_UUID"
if [[ ! -d "$MDEV_PATH" ]]; then
echo "ERROR: mdev device $MDEV_UUID not found at $MDEV_PATH"
exit 1
fi
# Verify guest image
if [[ ! -f "$GUEST_IMAGE" ]]; then
echo "ERROR: Guest image not found: $GUEST_IMAGE"
echo "Create one with: qemu-img create -f qcow2 $GUEST_IMAGE 50G"
exit 1
fi
# Check KVM
if [[ ! -r /dev/kvm ]]; then
echo "ERROR: KVM not available (/dev/kvm not readable)"
exit 1
fi
# Check VFIO
if [[ ! -e /dev/vfio/vfio ]]; then
echo "ERROR: VFIO not available"
exit 1
fi
# Get mdev info
VGPU_TYPE=$(cat "$MDEV_PATH/mdev_type/name" 2>/dev/null || echo "unknown")
PCI_ADDR=$(readlink -f "$MDEV_PATH/../../.." | xargs basename)
echo "=========================================="
echo "Launching QEMU with NVIDIA vGPU"
echo "=========================================="
echo "mdev UUID: $MDEV_UUID"
echo "vGPU Type: $VGPU_TYPE"
echo "PCI Addr: $PCI_ADDR"
echo "Guest Image: $GUEST_IMAGE"
echo "Extra Args: ${EXTRA_QEMU_ARGS[*]}"
echo "=========================================="
# CPU configuration for vGPU
CPU_OPTS=(
-cpu host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=NVIDIA42
-smp 8,sockets=1,cores=8,threads=1
-m 16G,slots=4,maxmem=64G
-mem-prealloc
)
# Memory backing for hugepages (better performance)
HUGEPAGE_OPTS=(
-object memory-backend-file,id=mem,size=16G,mem-path=/dev/hugepages,share=on
-numa node,memdev=mem
)
# VFIO device configuration
VFIO_OPTS=(
-device vfio-pci,sysfsdev="$MDEV_PATH",display=off,x-igd-opregion=on
-device vfio-pci,sysfsdev="$MDEV_PATH",display=off,romfile=
)
# Display (use SPICE/VNC for headless, or virtio-gpu for local)
DISPLAY_OPTS=(
-vga none
-display none
# Uncomment for VNC:
# -vnc :1
# Uncomment for SPICE:
# -spice port=5900,addr=127.0.0.1,disable-ticketing=on
# -device virtio-serial-pci
# -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0
# -chardev spicevmc,id=spicechannel0,name=vdagent
)
# Network
NET_OPTS=(
-netdev user,id=net0,hostfwd=tcp::2222-:22
-device virtio-net-pci,netdev=net0
)
# Storage
STORAGE_OPTS=(
-drive file="$GUEST_IMAGE",format=qcow2,if=virtio,cache=writeback,aio=threads
# Add ISO for installation:
# -drive file=/path/to/ubuntu-22.04-live-server-amd64.iso,format=raw,if=virtio,media=cdrom
)
# USB tablet for better mouse integration
USB_OPTS=(
-usb
-device usb-tablet
)
# RNG
RNG_OPTS=(
-object rng-random,id=rng0,filename=/dev/urandom
-device virtio-rng-pci,rng=rng0
)
# TPM (optional, for Windows guests)
# TPM_OPTS=(
# -chardev socket,id=chrtpm,path=/var/run/tpm-emulator/swtpm-sock
# -tpmdev emulator,id=tpm0,chardev=chrtpm
# -device tpm-tis,tpmdev=tpm0
# )
# QEMU command
QEMU_CMD=(
qemu-system-x86_64
-enable-kvm
-machine q35,accel=kvm,kernel_irqchip=split
-bios /usr/share/ovmf/OVMF.fd
"${CPU_OPTS[@]}"
"${HUGEPAGE_OPTS[@]}"
"${VFIO_OPTS[@]}"
"${DISPLAY_OPTS[@]}"
"${NET_OPTS[@]}"
"${STORAGE_OPTS[@]}"
"${USB_OPTS[@]}"
"${RNG_OPTS[@]}"
"${EXTRA_QEMU_ARGS[@]}"
-name "vGPU-Guest-$VGPU_TYPE"
-pidfile "/tmp/qemu-vgpu-$MDEV_UUID.pid"
-daemonize
)
echo "Starting QEMU..."
echo "Command: ${QEMU_CMD[*]}"
echo ""
"${QEMU_CMD[@]}"
sleep 2
if [[ -f "/tmp/qemu-vgpu-$MDEV_UUID.pid" ]]; then
PID=$(cat "/tmp/qemu-vgpu-$MDEV_UUID.pid")
if kill -0 "$PID" 2>/dev/null; then
echo "SUCCESS: QEMU started with PID $PID"
echo ""
echo "Connect via SSH: ssh -p 2222 user@localhost"
echo "Or VNC: vncviewer localhost:1 (if enabled)"
echo ""
echo "To stop: kill $PID"
else
echo "ERROR: QEMU failed to start"
exit 1
fi
else
echo "ERROR: QEMU PID file not created"
exit 1
fi
|
