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115 lines
3.1 KiB
Markdown
115 lines
3.1 KiB
Markdown
## PLAIN QEMU WITHOUT LIBVIRT
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### WORK IN PROGRESS
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Passthrough can be done with plain qemu without using libvirt. \
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The general idea of using plain qemu is to avoid managing libvirt configurations and rather use a single script.. \
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Stuffs directly taken from YuriAlek's [script](https://gitlab.com/YuriAlek/vfio/-/blob/master/scripts/windows-basic.sh).
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Create disk image with QEMU.
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```sh
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qemu-img create -f raw Disk.img 256G
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```
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The script should be run as superuser.
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```sh
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#!/bin/sh
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ULIMIT=$(ulimit -a | grep "max locked memory" | awk '{print $6}')
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# Replace 4 with the amount of RAM you supply to the VM (in GB)
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ULIMIT_TARGET=$((4 * 1048576 + 100000))
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ulimit -l $ULIMIT_TARGET
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# Should be run before VM starts
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function init_vm() {
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# Stop display manager (if any exists)
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# rc-service xdm stop
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# systemctl stop display-manager
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pkill -9 dwm
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sleep 1
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# Unbind EFI-framebuffer
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echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/unbind
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# Unload GPU modules
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modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia snd_hda_intel
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# modprobe -r amdgpu
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# Load vfio modules
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modprobe vfio-pci
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# Bind drivers to vfio
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echo "10de 1c03" > /sys/bus/pci/drivers/vfio-pci/new_id
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echo "0000:01:00.0" > /sys/bus/pci/devices/0000:01:00.0/driver/unbind
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echo "0000:01:00.0" > /sys/bus/pci/drivers/vfio-pci/bind
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echo "10de 1c03" > /sys/bus/pci/drivers/vfio-pci/remove_id
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echo "10de 10f1" > /sys/bus/pci/drivers/vfio-pci/new_id
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echo "0000:01:00.1" > /sys/bus/pci/devices/0000:01:00.1/driver/unbind
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echo "0000:01:00.1" > /sys/bus/pci/drivers/vfio-pci/bind
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echo "10de 10f1" > /sys/bus/pci/drivers/vfio-pci/remove_id
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}
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# Start VM
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function start_vm() {
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qemu-system-x86_64 \
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-runas qaidvoid \
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-nodefaults \
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-enable-kvm \
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-machine kernel_irqchip=on \
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-cpu host,kvm=off,hv_vendor_id=nil \
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-m 4G \
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-name "Guix" \
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-smp cores=2 \
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-drive file=/home/qaidvoid/VM/Disk.img,if=virtio,format=raw \
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-drive file=/home/qaidvoid/Downloads/guix-system-install-1.2.0.x86_64-linux.iso,media=cdrom \
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-serial none \
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-net nic \
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-net user \
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-vga none \
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-device vfio-pci,host=01:00.0,x-vga=on,multifunction=on \
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-device vfio-pci,host=01:00.1 \
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-object input-linux,id=mouse1,evdev=/dev/input/by-id/usb-PixArt_HP_USB_Optical_Mouse-event-mouse \
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-object input-linux,id=kbd1,evdev=/dev/input/by-id/usb-Chicony_USB_Keyboard-event-kbd,grab_all=on,repeat=on \
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-device virtio-keyboard \
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-device virtio-mouse
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}
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# Should be run on VM shutdown
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function stop_vm() {
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# Unload VFIO modules
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modprobe -r vfio-pci
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ulimit -l $ULIMIT
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# Reboot system, because I have no idea how to rebind drivers
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reboot
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# Load GPU modules
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modprobe nvidia_drm
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modprobe nvidia_modeset
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modprobe nvidia_uvm
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modprobe nvidia
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# modprobe amdgpu
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# Attach GPU to host ? driver doesn't exist ?
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echo "0000:01:00.0" > /sys/bus/pci/devices/0000:01:00.0/driver/bind
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echo "0000:01:00.1" > /sys/bus/pci/devices/0000:01:00.1/driver/bind
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# Bind EFI framebuffer to host
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echo "efi-framebuffer.0" > /sys/bus/platform/drivers/efi-framebuffer/bind
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# Restart Display Manager
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# rc-service xdm start
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# systemctl start display-manager
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# su - qaidvoid -c startx
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}
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init_vm
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start_vm
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stop_vm
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```
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