70 lines
1.8 KiB
Nix
70 lines
1.8 KiB
Nix
{
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pkgs ? import <nixpkgs> { },
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}:
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pkgs.writeShellApplication {
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name = "test-image";
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runtimeInputs = [
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pkgs.qemu
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pkgs.OVMF
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];
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text = ''
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set -euo pipefail
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if [ $# -lt 1 ]; then
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echo "Usage: $0 <path-to-boot-image> [x86_64|aarch64]" >&2
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exit 1
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fi
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img="$1"
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arch="''\${2:-$(uname -m)}"
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accel=( -accel kvm )
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[ -e /dev/kvm ] || accel=( -accel "tcg,thread=multi" )
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case "$arch" in
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x86_64|amd64)
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qemu_bin="qemu-system-x86_64"
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machine=( -machine q35 )
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cpu=( -cpu max )
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smp=( -smp 4 )
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ram=( -m 4G )
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pflash_code=( -drive "if=pflash,format=raw,readonly=on,file=${pkgs.OVMF.firmware}" )
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pflash_vars=( -drive "if=pflash,format=raw,readonly=on,file=${pkgs.OVMF.variables}" )
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;;
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aarch64|arm64)
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qemu_bin="qemu-system-aarch64"
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machine=( -machine virt )
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cpu=( -cpu host )
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smp=( -smp 4 )
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ram=( -m 4G )
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# Copy VARS to a writable temp file; QEMU opens it read/write
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varsTmp=$(mktemp /tmp/AAVMF_VARS.fd.XXXXXX)
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cp ${pkgs.OVMF.fd}/FV/AAVMF_VARS.fd "$varsTmp"
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pflash_code=( -drive "if=pflash,format=raw,readonly=on,file=${pkgs.OVMF.fd}/FV/AAVMF_CODE.fd" )
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pflash_vars=( -drive "if=pflash,format=raw,file=$varsTmp" )
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;;
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*)
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echo "Unsupported arch: $arch" >&2
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exit 1
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;;
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esac
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tmpFile=$(mktemp /tmp/test-image.XXXXXX)
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trap 'rm -f "$tmpFile"' EXIT
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cp "$img" "$tmpFile"
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"$qemu_bin" \
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"''\${accel[@]}" \
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"''\${machine[@]}" \
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"''\${cpu[@]}" \
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"''\${ram[@]}" \
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"''\${smp[@]}" \
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-netdev user,id=net0,hostfwd=tcp::2222-:22 \
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-device virtio-net-pci,netdev=net0 \
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"''\${pflash_code[@]}" \
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"''\${pflash_vars[@]}" \
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-drive "if=virtio,format=raw,file=$tmpFile"
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'';
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}
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