work-tools/qrun at main · soleen/work-tools · GitHub

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#!/bin/bash
# Author: Pasha Tatashin <pasha.tatashin@soleen.com>
set -e

qemu_args=(
	-name "qrunvm"
	-nographic
	-no-reboot
	-virtfs "local,path=/,mount_tag=hostfs,security_model=none,multidevs=remap"
	-machine "q35"
	-serial "mon:stdio"
)

network_args=(
	-s
	-net "nic,model=virtio-net-pci"
	-net "user,hostfwd=tcp::5555-:22"
	-qmp "tcp:localhost:4444,server,nowait"
)

x86_64_args=(
	-enable-kvm
	-bios "qboot.rom"
	-machine "q35"
	-cpu "host"
)

arm64_args=(
	-machine virt
	-cpu "cortex-a57"
)

QEMU=""
KPARAM=""
NCPU=4
MEM=8G
IMAGE=""
NETWORK=true

DEFAULT_ARCH="x86_64"
ARCH=""

usage() {
    echo "Usage: $0 [-k <append_kernel_cmd>] [-m MEM] [-c NCPU] [-a ARCH] [-N] [-i image] [-q qemu_exec] [-- qemu_options]"
    echo "  -k <append_kernel_cmd> Extra parameters to append to the kernel command line."
    echo "  -m MEM                   Amount of RAM for the VM (e.g., 4G, 512M). Default: $MEM"
    echo "  -c NCPU                  Number of CPU cores. Default: $NCPU"
    echo "  -a ARCH                  Target architecture (e.g., x86_64, arm64). Default: $DEFAULT_ARCH"
    echo "  -N                       Disable the network configuration."
    echo "  -i image                 Optional path to the boot image file."
    echo "  -q qemu_exec             QEMU executable ). Default: qemu-system-$DEFAULT_ARCH"
    echo "  -- qemu_options          Additional arguments passed directly to QEMU."
    exit 1
}

while getopts "k:m:c:a:Ni:q:h" o; do
	case "${o}" in
	k)
		KPARAM+=" ${OPTARG}"
		;;
	m)
		MEM=${OPTARG}
		;;
	c)
		NCPU=${OPTARG}
		;;
	a)
		ARCH=${OPTARG}
		;;
	N)
		NETWORK=false
		;;
	i)
		IMAGE=${OPTARG}
		;;
	q)
		QEMU=${OPTARG}
		;;
	h)
		usage
		;;
        \?)
		usage
		;;
	esac
done

shift $((OPTIND-1))

# skip --
if [[ "$1" == "--" ]]; then
    shift
fi

extra_args+=("$@")

DEBIAN_RELEASE=bookworm

if [[ "$ARCH" == "x86_64" ]]; then
	if [[ "$IMAGE" == "" ]]; then
		IMAGE=$HOME/.images/debian_$ARCH-$DEBIAN_RELEASE.img
	fi
	if [[ ! -f $IMAGE ]]; then
		rm -f $IMAGE
		mkrootfs -d bookworm -s 8G -o $IMAGE
	fi
	KERN=$ARCH/
elif [[ "$ARCH" == "arm64" ]]; then
	if [[ "$IMAGE" == "" ]]; then
		IMAGE=$HOME/.images/debian_$ARCH-$DEBIAN_RELEASE.img
	fi
	if [[ ! -f $IMAGE ]]; then
		rm -f $IMAGE
		mkrootfs -d bookworm -s 8G -a arm64 -o $IMAGE
	fi
	KERN=$ARCH/
else
	DEBIAN_RELEASE=trixie
	ARCH=x86_64

	if [[ "$IMAGE" == "" ]]; then
		IMAGE=$HOME/.images/debian_$ARCH-$DEBIAN_RELEASE.img
	fi
	if [[ ! -f $IMAGE ]]; then
		rm -f $IMAGE
		mkrootfs -d $DEBIAN_RELEASE -s 8G -o $IMAGE
	fi
	KERN=""
fi

if [[ "$ARCH" == "x86_64" ]]; then
	qemu_args+=("${x86_64_args[@]}")
	KPARAM+=" console=ttyS0,115200 root=/dev/sda earlyprintk=ttyS0"
	KERN=${KERN}arch/x86/boot/bzImage
else
	qemu_args+=("${arm64_args[@]}")
	KPARAM+=" console=ttyAMA0,115200 root=/dev/vda"
	KERN=${KERN}arch/arm64/boot/Image
fi

if [[ "$QEMU" == "" ]]; then
	QEMU="qemu-system-$ARCH"
fi

qemu_args+=(-m "$MEM")
qemu_args+=(-smp "$NCPU")

if [[ $NETWORK == true ]]; then
	qemu_args+=("${network_args[@]}")
fi

qemu_args+=("${extra_args[@]}")
qemu_args+=(-drive "file=$IMAGE,format=raw")
qemu_args+=(-kernel "$KERN")
qemu_args+=(-append "$KPARAM rw")

printf " %s" "$QEMU" "${qemu_args[@]}"
echo

$QEMU "${qemu_args[@]}"