KVM-AutoBooter-TheTechSir

boot any vfio guest right from your boot loader, I made this solution since I don't always want macOS & Windows booting. until now I had three host os for the purpose of auto booting with just X11 on all opus, one for my Nvidia and win11 autobot KVM, and one for my AMD Mac KVM. This method will guide you to create systems service for each guest you want to be able to trigger auto booting from boot loader.

Cheat sheet, if you want to avoid my script, just reffer to these notes and keep in mind all you need is 3 things 1 - a script you want executed essentially only when you have the kernel command line variable (bootloader variable like mac=0) 2 - a systemd service that will execute that script when started. The service will be enabled all the time, only started with boot condition met 3 - your kernel command line option in a new boot entry with virtually any bootloader you're using.

################################################ CHEAT SHEET #####################################################################################

Systemd service creation

sudo nano /etc/systemd/system/kvmBoot-Win.service ####### in file [Unit] Description=win-kvm-boot ConditionKernelCommandLine=win=0 [Service] #User= WorkingDirectory=/ #ExecStart=/bin/true ./kvmBoot-Win.sh Type=oneshot TimeoutSec=0 RemainAfterExit=yes ExecStart=/bin/bash -c 'cd / && ./kvmBoot-Win.sh' [Install] WantedBy=multi-user.target

sudo nano /etc/systemd/system/kvmBoot-mac.service

in file

[Unit] Description=mac-kvm-boot ConditionKernelCommandLine=mac=0 [Service] #User= WorkingDirectory=/ #ExecStart=/bin/true ./kvmBoot-mac.sh Type=oneshot TimeoutSec=0 RemainAfterExit=yes ExecStart=/bin/bash -c 'cd / && ./kvmBoot-mac.sh' [Install] WantedBy=multi-user.target

inside youre mac or win kvmBoot.sh

sudo virsh start {vmname}

win

menuentry "Nvidia VFIO Win11" { icon /EFI/refind/os_win.png volume "gtxArch"

loader   /boot/vmlinuz-linux-vfio
initrd   /boot/initramfs-linux-vfio.img
options  "root=LABEL=gtxArch rw resume=/dev/nvme0n1p2 win=0 

video=efifb:off quiet text iommu=pt intel_iommu=on vt.global_cursor_default=0 loglevel=3 optimus-manager.startup=integrated systemd.unit=multi-user.target vfio-pci.ids=1462:7b98,8086:a305,1462:7b98,8086:a348,1462:9b98,8086:a323,1462:7b98 ,8086:a3234,1462:7b98,8086:a324 ,8086:15bc,14e4:43a0,106b:0117,1462:341b,1462:aaf0,1002:67df,1002:aaf0,10de:2182,10de:1aeb,10de:1aec,10de:1aed initrd=boot/initramfs-linux-vfio.img" submenuentry "Boot macOS also" { add_options "mac=0 vfio-pci.ids=8086:a36d,1462:7b98,8086:a36f,1002:67df,1462:341b,1002:aaf0,1462:aaf0,14e4:43a0,106b:0117"

}

submenuentry "Boot to SDDM" {
    add_options "systemd.unit=graphical.target"
}
enabled

}

gtxArch for Mac vfio

menuentry "VFIO Kernel MacOS" { icon /EFI/refind/os_mac.png volume "gtxArch" loader /boot/vmlinuz-linux-vfio initrd /boot/initramfs-linux-vfio.img options "root=LABEL=gtxArch rw resume=/dev/nvme0n1p2 mac=0 video=efifb:off quiet text iommu=pt intel_iommu=on vt.global_cursor_default=0 loglevel=3 optimus-manager. startup=integrated systemd.unit=multi-user.target vfio-pci.ids=1462:7b98,8086:a305,1462:7b98,8086:a348,1462:9b98, 8086:a323,1462:7b98,8086:a3234,1462:7b98,8086:a324,8086:15bc,14e4:43a0,106b:0117, 1462:341b,1462:aaf0,1002:67df,1002:aaf0,8086:a36d,1462:7b98,8086:a36f,8086:7270 initrd=boot/initramfs-linux-vfio.img" submenuentry "Boot using fallback initramfs" { initrd /boot/initramfs-linux-fallback.img } submenuentry "Boot to sddm" { add_options "systemd.unit=graphical.target" } enabled } ####################################################### End of CHEET SHEET #########################################################################

Exact Contents of Script

tput bold echo '-------------KVM Auto Boot Systemd Helper--------------' tput setaf 6 cat thetechsir.txt echo tput setaf 4 tput setaf 3 cat banner.txt tput setaf 2 tput setaf 7 echo tput setaf 2 echo '-------------Select Your Option--------------' tput setaf 4 echo '-- 1 create your kvm virt guest start script' tput setaf 4 echo '-- 2 create&enable systemd service with boot condition' tput setaf 4 echo '-- 3 dump your manual.conf with new option added for refind' tput setaf 2 echo '-------------Select Your Option--------------' echo '-------------By' "$(tput setaf 5)TheTechSir" "$(tput setaf 7)--------------"

#select num in 1 2 3 4 #do #echo "you have chosen $num" #if [[ -z "$num" ]]; then

printf '%s\n' "No input entered"

#done

read -ep "enter 1 to begin: " numSelect if [ "$numSelect" == "1" ] then read -ep "VM Name Plz: " vmName sudo mkdir /etc/libvirt/auto-kvm/

echo "sudo virsh start ${vmName}" > "/tmp/${vmName}.sh" sudo chmod +x "/tmp/${vmName}.sh" sudo cp "/tmp/${vmName}.sh" "/etc/libvirt/auto-kvm/${vmName}.sh" echo start script was created here /etc/libvirt/auto-kvm/${vmName}.sh vmstart=/etc/libvirt/auto-kvm/${vmName}.sh fi

echo "Create systemd service for this kvm 2"

vmstart=/etc/libvirt/auto-kvm/${vmName}.sh read -ep "Service Name Plz: " serviceName echo $serviceName

touch /tmp/${serviceName}.service

cat <> /tmp/${serviceName}.service

[Unit] Description=${serviceName}-kvm-boot ConditionKernelCommandLine=${vmName}=0 [Service] WorkingDirectory=/ Type=oneshot TimeoutSec=0 RemainAfterExit=yes ExecStart=/bin/bash -c 'cd / && .${vmstart}' [Install] WantedBy=multi-user.target EOT sudo mv /tmp/${serviceName}.service /etc/systemd/system/${serviceName}.service tput setaf 2 cat /etc/systemd/system/${serviceName}.service sudo systemctl enable $serviceName echo echo tput setaf 7 echo now simply add ${vmName}=0 to your bootloader, guest will only boot when echo your bootloader has this line in it. echo enjoy! echo echo tput setaf 4 sudo systemctl status $serviceName