# QEMU flags shared between various Nix expressions. { pkgs }: let zeroPad = n: pkgs.lib.optionalString (n < 16) "0" + (if n > 255 then throw "Can't have more than 255 nets or nodes!" else pkgs.lib.toHexString n); in rec { qemuNicMac = net: machine: "52:54:00:12:${zeroPad net}:${zeroPad machine}"; qemuNICFlags = nic: net: machine: [ "-device virtio-net-pci,netdev=vlan${toString nic},mac=${ qemuNicMac net machine }" "-netdev vde,id=vlan${toString nic},sock=$QEMU_VDE_SOCKET_${toString net}" ]; qemuSerialDevice = if pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64 then "ttyS0" else if pkgs.stdenv.isAarch32 || pkgs.stdenv.isAarch64 then "ttyAMA0" else throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'"; qemuBinary = qemuPkg: { x86_64-linux = "${qemuPkg}/bin/qemu-kvm -cpu max"; armv7l-linux = "${qemuPkg}/bin/qemu-system-arm -enable-kvm -machine virt -cpu host"; aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -enable-kvm -machine virt,gic-version=host -cpu host"; x86_64-darwin = "${qemuPkg}/bin/qemu-kvm -cpu max"; aarch64-genode = "${qemuPkg}/bin/qemu-system-aarch64 -M virt,virtualization=true,gic_version=3 -cpu cortex-a53"; x86_64-genode = "${qemuPkg}/bin/qemu-system-x86_64 -machine q35"; }.${pkgs.stdenv.hostPlatform.system} or "${qemuPkg}/bin/qemu-kvm"; }