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|
#!/bin/bash
#
# user changeable parameters
#
HDA_FILE="${HOME}/ubuntu-18.04-desktop.qcow2"
GUEST_SIZE_IN_MB="4096"
SEV_GUEST="1"
SMP_NCPUS="4"
CONSOLE="qxl"
QEMU_INSTALL_DIR=/usr/local/bin/
UEFI_BIOS_CODE="/usr/local/share/qemu/OVMF_CODE.fd"
UEFI_BIOS_VARS="OVMF_VARS.fd"
#VNC_PORT=""
USE_VIRTIO="1"
usage() {
echo "$0 [options]"
echo "Available <commands>:"
echo " -hda hard disk ($HDA_FILE)"
echo " -nosev disable sev support"
echo " -mem guest memory"
echo " -smp number of cpus"
echo " -console display console to use (serial or gxl)"
echo " -vnc VNC port to use"
echo " -bios bios to use (default $UEFI_BIOS_CODE)"
echo " -kernel kernel to use"
echo " -initrd initrd to use"
echo " -cdrom CDROM image"
echo " -virtio use virtio devices"
echo " -gdb start gdbserver"
exit 1
}
add_opts() {
echo -n "$* " >> ${QEMU_CMDLINE}
}
run_cmd () {
$*
if [ $? -ne 0 ]; then
echo "command $* failed"
exit 1
fi
}
if [ `id -u` -ne 0 ]; then
echo "Must be run as root!"
exit 1
fi
while [[ $1 != "" ]]; do
case "$1" in
-hda) HDA_FILE="${2}"
shift
;;
-nosev) SEV_GUEST="0"
;;
-mem) GUEST_SIZE_IN_MB=${2}
shift
;;
-console) CONSOLE=${2}
shift
;;
-smp) SMP_NCPUS=$2
shift
;;
-vnc) VNC_PORT=$2
shift
if [ "${VNC_PORT}" = "" ]; then
usage
fi
;;
-bios) UEFI_BIOS_CODE="`readlink -f $2`"
shift
;;
-netconsole) NETCONSOLE_PORT=$2
shift
;;
-initrd) INITRD_FILE=$2
shift
;;
-kernel) KERNEL_FILE=$2
shift
;;
-cdrom) CDROM_FILE=$2
shift
;;
-virtio) USE_VIRTIO="1"
;;
-gdb) USE_GDB="1"
;;
*) usage;;
esac
shift
done
# we add all the qemu command line options into a file
QEMU_CMDLINE=/tmp/cmdline.$$
rm -rf ${QEMU_CMDLINE}
add_opts "${QEMU_INSTALL_DIR}qemu-system-x86_64"
# Basic virtual machine property
add_opts "-enable-kvm -cpu EPYC -machine q35"
# add number of VCPUs
[ ! -z ${SMP_NCPUS} ] && add_opts "-smp ${SMP_NCPUS},maxcpus=64"
# define guest memory
add_opts "-m ${GUEST_SIZE_IN_MB}M,slots=5,maxmem=30G"
# The OVMF binary, including the non-volatile variable store, appears as a
# "normal" qemu drive on the host side, and it is exposed to the guest as a
# persistent flash device.
add_opts "-drive if=pflash,format=raw,unit=0,file=${UEFI_BIOS_CODE},readonly"
add_opts "-drive if=pflash,format=raw,unit=1,file=${UEFI_BIOS_VARS}"
# add CDROM if specified
[ ! -z ${CDROM_FILE} ] && add_opts "-drive file=${CDROM_FILE},media=cdrom -boot d"
add_opts "-netdev user,id=vmnic -device e1000,netdev=vmnic"
# If harddisk file is specified then add the HDD drive
if [ ! -z ${HDA_FILE} ]; then
if [ "$USE_VIRTIO" = "1" ]; then
if [[ ${HDA_FILE} = *"qcow2" ]]; then
add_opts "-drive file=${HDA_FILE},if=none,id=disk0,format=qcow2"
else
add_opts "-drive file=${HDA_FILE},if=none,id=disk0,format=raw"
fi
add_opts "-device virtio-scsi-pci,id=scsi,disable-legacy=on,iommu_platform=true"
add_opts "-device scsi-hd,drive=disk0"
else
if [[ ${HDA_FILE} = *"qcow2" ]]; then
add_opts "-drive file=${HDA_FILE},format=qcow2"
else
add_opts "-drive file=${HDA_FILE},format=raw"
fi
fi
fi
# If this is SEV guest then add the encryption device objects to enable support
if [ ${SEV_GUEST} = "1" ]; then
add_opts "-object sev-guest,id=sev0,cbitpos=47,reduced-phys-bits=1"
add_opts "-machine memory-encryption=sev0"
fi
# if console is serial then disable graphical interface
if [ "${CONSOLE}" = "serial" ]; then
add_opts "-nographic"
else
add_opts "-vga ${CONSOLE}"
fi
# if -kernel arg is specified then use the kernel provided in command line for boot
if [ "${KERNEL_FILE}" != "" ]; then
add_opts "-kernel $KERNEL_FILE"
add_opts "-append \"console=ttyS0 earlyprintk=serial root=/dev/sda2\""
[ ! -z ${INITRD_FILE} ] && add_opts "-initrd ${INITRD_FILE}"
fi
# start vnc server
[ ! -z ${VNC_PORT} ] && add_opts "-vnc :${VNC_PORT}" && echo "Starting VNC on port ${VNC_PORT}"
# start monitor on pty
add_opts "-monitor pty"
# add virtio ring
if [ "$USE_VIRTIO" = "1" ]; then
add_opts "-device virtio-rng-pci,disable-legacy=on,iommu_platform=true"
fi
# log the console output in stdout.log
QEMU_CONSOLE_LOG=`pwd`/stdout.log
# save the command line args into log file
cat $QEMU_CMDLINE | tee ${QEMU_CONSOLE_LOG}
echo | tee -a ${QEMU_CONSOLE_LOG}
# map CTRL-C to CTRL ]
echo "Mapping CTRL-C to CTRL-]"
stty intr ^]
echo "Launching VM ..."
bash ${QEMU_CMDLINE} 2>&1 | tee -a ${QEMU_CONSOLE_LOG}
# restore the mapping
stty intr ^c
rm -rf ${QEMU_CMDLINE}
|
