max / mountaineer

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1	# tools/qemu/common.sh — sourced helpers for the qemu wrapper scripts.
2	# Centralizes paths, firmware locations, and the QEMU invocation pattern
3	# so the per-task scripts (vm-up, vm-build, vm-test-install) stay terse.
4
5	set -eu
6
7	ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
8	VMS="$ROOT/.vms"
9	ISO_DIR="$VMS/iso"
10	IMG_DIR="$VMS/images"
11	DISK_DIR="$VMS/disks"
12	NVRAM_DIR="$VMS/nvram"
13	KEYS_DIR="$VMS/keys"
14
15	# Alpine release pinning.
16	# ALPINE_VERSION is the full point version; the major.minor part selects
17	# the release branch directory, the full version names the file. Current
18	# as of 2026-05: 3.23.4 in main+community.
19	ALPINE_VERSION="${ALPINE_VERSION:-3.23.4}"
20	ALPINE_BRANCH="${ALPINE_VERSION%.*}"
21	ALPINE_ISO_URL="${ALPINE_ISO_URL:-https://dl-cdn.alpinelinux.org/alpine/v${ALPINE_BRANCH}/releases/x86_64/alpine-virt-${ALPINE_VERSION}-x86_64.iso}"
22	ALPINE_ISO="$ISO_DIR/$(basename "$ALPINE_ISO_URL")"
23	ALPINE_CLOUD_URL="${ALPINE_CLOUD_URL:-https://dl-cdn.alpinelinux.org/alpine/v${ALPINE_BRANCH}/releases/cloud/generic_alpine-${ALPINE_VERSION}-x86_64-uefi-cloudinit-r0.qcow2}"
24
25	OVMF_CODE="/opt/homebrew/share/qemu/edk2-x86_64-code.fd"
26	OVMF_VARS_TEMPLATE="/opt/homebrew/share/qemu/edk2-i386-vars.fd"
27
28	# Apple Silicon: no HVF for x86_64. Use TCG with as much help as we can give it.
29	# QEMU 11+: pass accel via a separate -accel flag, not as a -machine property
30	# (thread=multi is an -accel property, not a machine property).
31	ACCEL_ARGS="-accel tcg,thread=multi"
32	SMP="${SMP:-4}"
33	MEM="${MEM:-4G}"
34
35	# Forwarded SSH ports.
36	BUILDER_SSH_PORT="${BUILDER_SSH_PORT:-2222}"
37	TARGET_SSH_PORT="${TARGET_SSH_PORT:-2223}"
38
39	# Common QEMU invocation. Callers add: -drive, -cdrom, -netdev forwards,
40	# -name, AND a -serial flag (we don't pick one here because daemonized
41	# and foreground modes want different serial routing).
42	qemu_base_args() {
43	local name="$1"
44	local nvram="$NVRAM_DIR/${name}_VARS.fd"
45	if [ ! -f "$nvram" ]; then
46	cp "$OVMF_VARS_TEMPLATE" "$nvram"
47	fi
48	cat <<EOF
49	-name $name
50	-machine type=q35
51	$ACCEL_ARGS
52	-cpu max
53	-smp $SMP
54	-m $MEM
55	-drive if=pflash,format=raw,readonly=on,file=$OVMF_CODE
56	-drive if=pflash,format=raw,file=$nvram
57	-rtc base=utc
58	-device virtio-rng-pci
59	-vga virtio
60	-display none
61	EOF
62	}
63
64	ensure_alpine_iso() {
65	if [ ! -f "$ALPINE_ISO" ]; then
66	echo "==> downloading Alpine $ALPINE_VERSION ISO ..."
67	mkdir -p "$ISO_DIR"
68	curl -fL --progress-bar -o "$ALPINE_ISO" "$ALPINE_ISO_URL"
69	fi
70	}
71
72	ensure_dirs() {
73	mkdir -p "$ISO_DIR" "$IMG_DIR" "$DISK_DIR" "$NVRAM_DIR" "$KEYS_DIR"
74	}
75