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|
#! /usr/bin/env bash
# Test a virtual machine with KVM on Apple M1. Notes:
#
# - Need QEMU 7 or later.
# - Login via VNC to :5901.
# - Expect to find QEMU_EFI.fd and QEMU_VARS.fd next to disk.img.
# - Installing with -cdrom does not work, have to use scsi-cd:
#
# -device virtio-scsi-pci,id=scsi0 \
# -drive if=none,id=cd,file=/tmp/debian-....iso \
# -device scsi-cd,drive=cd
#
# - Replaced -usb (EHCI) with -device qemu-xhci (XHCI).
# - Added virtio-gpu-pci (otherwise no graphical output).
# - Added usb-kbd (otherwise no keyboard).
# - Must run on either P or E cores (https://gitlab.com/qemu-project/qemu/-/issues/1002)
# - On M1 0-3 are E, 4-7 are P (lscpu, lscpu -e)
#
# -n <nic>
# Network adapter to use, for example, virtio-net-pci (default), e1000,
# or vmxnet3.
#
# -t <tap>
# Existing tap interface to use instead of creating a new one (as tap9).
#
usage="usage: $0 [-n <nic>] <machine-dir> [<qemu-option>...]"
owd="$(pwd)"
trap "{ cd '$owd'; exit 1; }" ERR
set -o errtrace # Trap in functions.
function info () { echo "$*" 1>&2; }
function error () { info "$*"; exit 1; }
br=br0
mac="de:ad:be:ef:b8:da"
arch="$(uname -m)"
kvm=(taskset -c 4-7 "qemu-system-$arch" -enable-kvm)
nic=virtio-net-pci
etap=
while [ "$#" -gt 0 ]; do
case "$1" in
-n)
shift
nic="$1"
shift
;;
-t)
shift
etap="$1"
shift
;;
*)
break
;;
esac
done
dir="${1%/}"
shift
if [ -z "$dir" ]; then
error "missing machine directory"
fi
if [ -z "$etap" ]; then
tap=tap9
sudo ip tuntap delete "$tap" mode tap || true
sudo ip tuntap add "$tap" mode tap user "$(whoami)"
sudo ip link set "$tap" up
#sleep 0.5s
sudo ip link set "$tap" master "$br"
else
tap="$etap"
fi
# Can be used instead of -vnc:
#
#-device virtio-gpu-pci \
#-display default,show-cursor=on \
#
"${kvm[@]}" \
-machine virt \
\
-m 4G \
-cpu host -smp "4,sockets=1,cores=4,threads=1" \
\
-drive "if=pflash,format=raw,readonly=on,file=$dir/QEMU_EFI.fd" \
-drive "if=pflash,format=raw,file=$dir/QEMU_VARS.fd" \
\
-netdev "tap,id=net0,ifname=$tap,script=no" \
-device "$nic,netdev=net0,mac=$mac" \
\
-drive "if=none,id=disk0,file=$dir/disk.img,format=raw" \
-device "virtio-blk-pci,scsi=off,drive=disk0" \
\
-device qemu-xhci \
-device usb-kbd \
-device usb-tablet \
\
-vnc :1 \
\
-chardev stdio,id=qmp \
-mon chardev=qmp,mode=control,pretty=on \
\
-boot c "$@"
if [ -z "$etap" ]; then
sudo ip tuntap delete "$tap" mode tap
fi
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