Forum iot-tech.dev

Posted: **Tue Sep 17, 2024 7:43 pm**

https://github.com/tholin/OVMF-win7-hyp ... n7_code.fd

qemu-system-x86_64 \
  -enable-kvm \
  -m 4G \
  -mem-prealloc \
  -mem-path /dev/hugepages \
  -smp 8,sockets=1,cores=8,threads=1 \
  -cpu host \
  -drive file=void-linux.vdi,format=vdi,if=none,id=drive0 \
  -object iothread,id=iothread0 \
  -device virtio-blk-pci,drive=drive0,iothread=iothread0 \
  -vga none \
  -device virtio-gpu-gl-pci,max_outputs=1 \
  -display sdl,gl=on \
  -netdev user,id=usernet,hostfwd=tcp::2222-:22 \
  -device virtio-net-pci,netdev=usernet \
  -bios /usr/share/OVMF/OVMF_CODE.fd \
  -boot menu=on

Use VirtIO 1.0 Devices
If your hardware and QEMU version support it, you can enable VirtIO 1.0 devices for improved performance over legacy VirtIO. These devices are typically more efficient and faster.

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qemu-system-x86_64 \
  -enable-kvm \
  -m 4G \
  -mem-prealloc \
  -mem-path /dev/hugepages \
  -smp 8,sockets=1,cores=8,threads=1 \
  -cpu host \
  -drive file=void-linux.vdi,format=vdi,if=none,id=drive0 \
  -object iothread,id=iothread0 \
  -device virtio-blk-pci,drive=drive0,disable-modern=off,iothread=iothread0 \
  -vga none \
  -device virtio-gpu-gl-pci,max_outputs=1 \
  -display sdl,gl=on \
  -netdev user,id=usernet,hostfwd=tcp::2222-:22 \
  -device virtio-net-pci,disable-modern=off,netdev=usernet \
  -bios /usr/share/OVMF/OVMF_CODE.fd \
  -boot menu=on

USB 3 controller example:

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qemu-system-x86_64 \
  -enable-kvm \
  -m 4G \
  -mem-prealloc \
  -mem-path /dev/hugepages \
  -smp 8,sockets=1,cores=8,threads=1 \
  -cpu host \
  -drive file=void-linux.vdi,format=vdi,if=none,id=drive0 \
  -object iothread,id=iothread0 \
  -device virtio-blk-pci,drive=drive0,disable-modern=off,iothread=iothread0 \
  -vga none \
  -device virtio-gpu-gl-pci,max_outputs=1 \
  -display sdl,gl=on \
  -netdev user,id=usernet,hostfwd=tcp::2222-:22 \
  -device virtio-net-pci,disable-modern=off,netdev=usernet \
  -bios /usr/share/OVMF/OVMF_CODE.fd \
  -boot menu=on \
  -usb \
  -device qemu-xhci,id=xhci \
  -device usb-host,vendorid=0x0b05,productid=0x17cb

Posted: **Wed Apr 16, 2025 6:33 am**

Windows config example with Qemu:

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qemu-system-x86_64 \
  -machine q35,accel=kvm \
  -cpu host \
  -smp 4,sockets=1,cores=2,threads=2 \
  -m 8G \
  -drive if=pflash,format=raw,file=/usr/share/qemu/edk2-x86_64-code.fd,readonly=on \
  -drive file=win.vdi,format=vdi,if=ide \
  -cdrom virtio-win.iso \
  -vga qxl \
  -display sdl \
  -usb -device usb-tablet -device usb-kbd \
  -netdev user,id=net0 -device e1000,netdev=net0 \
  -rtc base=localtime \
  -device piix3-usb-uhci

Posted: **Sun Jul 06, 2025 2:20 pm**

Script that will make pci-e pass to VM and give example how can be done on Devuan linux.

# Install necessary packages
echo "[+] Installing QEMU, KVM, and supporting packages..."
apt update
apt install -y qemu-system-x86 qemu-utils qemu-block-extra virt-manager libvirt-daemon-system libvirt-clients bridge-utils ovmf

# Enable IOMMU in GRUB
echo "[+] Configuring GRUB for IOMMU..."
GRUB_CFG="/etc/default/grub"

if grep -q "intel_iommu=on" "$GRUB_CFG" || grep -q "amd_iommu=on" "$GRUB_CFG"; then
echo "IOMMU already configured in GRUB."
else
CPU_VENDOR=$(lscpu | grep -i "Vendor" | awk '{print $3}')
if [[ "$CPU_VENDOR" == "AuthenticAMD" ]]; then
sed -i 's/GRUB_CMDLINE_LINUX="/GRUB_CMDLINE_LINUX="amd_iommu=on /' "$GRUB_CFG"
else
sed -i 's/GRUB_CMDLINE_LINUX="/GRUB_CMDLINE_LINUX="intel_iommu=on /' "$GRUB_CFG"
fi
update-grub
fi

# Create modprobe config to bind GPU to vfio-pci
echo "[+] Configuring VFIO for the NVIDIA GT 730..."
cat > /etc/modprobe.d/vfio.conf <<EOF
options vfio-pci ids=10de:0f02,10de:0bea
EOF

# Blacklist nouveau driver
echo "[+] Blacklisting nouveau driver..."

cat > /etc/modprobe.d/blacklist-nouveau.conf <<EOF
blacklist nouveau
options nouveau modeset=0
EOF

echo vfio >> /etc/initramfs-tools/modules
echo vfio_pci >> /etc/initramfs-tools/modules
echo vfio_iommu_type1 >> /etc/initramfs-tools/modules
echo vfio_virqfd >> /etc/initramfs-tools/modules

# Update initramfs
echo "[+] Updating initramfs..."
update-initramfs -u

# Load VFIO modules at boot
echo "[+] Enabling VFIO modules..."
cat > /etc/modules-load.d/vfio.conf <<EOF
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
EOF

# Enable and start libvirtd service using SysV init
echo "[+] Starting libvirtd using SysV init..."
if [ -x /etc/init.d/libvirtd ]; then
/etc/init.d/libvirtd start
update-rc.d libvirtd defaults
else
echo "[-] libvirtd init script not found. Please check if it's installed correctly."
fi

# Final message
echo "=== All configuration complete. Rebooting is required to apply changes. ==="
read -p "Do you want to reboot now? [y/N]: " confirm
if [[ "$confirm" =~ ^[Yy]$ ]]; then
reboot
else
echo "Reboot manually to apply changes."
fi

Example for /etc/default/grub

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GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt amd_iommu=on vfio-pci.ids=1002:67ff,1002:aae0"

Forum iot-tech.dev

qemu uefi virtio-gpu-gl example hi performance config

qemu uefi virtio-gpu-gl example hi performance config

Re: qemu uefi virtio-gpu-gl example hi performance config

Re: qemu uefi virtio-gpu-gl example hi performance config