64 lines
2.5 KiB
Nix
64 lines
2.5 KiB
Nix
# QEMU-related utilities shared between various Nix expressions.
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{ lib, pkgs }:
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let
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zeroPad = n:
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lib.optionalString (n < 16) "0" +
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(if n > 255
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then throw "Can't have more than 255 nets or nodes!"
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else lib.toHexString n);
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in
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rec {
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qemuNicMac = net: machine: "52:54:00:12:${zeroPad net}:${zeroPad machine}";
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qemuNICFlags = nic: net: machine:
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[
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"-device virtio-net-pci,netdev=vlan${toString nic},mac=${qemuNicMac net machine}"
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''-netdev vde,id=vlan${toString nic},sock="$QEMU_VDE_SOCKET_${toString net}"''
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];
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qemuSerialDevice =
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if pkgs.stdenv.hostPlatform.isx86 || pkgs.stdenv.hostPlatform.isRiscV then "ttyS0"
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else if (with pkgs.stdenv.hostPlatform; isAarch || isPower) then "ttyAMA0"
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else throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'";
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qemuBinary = qemuPkg:
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let
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hostStdenv = qemuPkg.stdenv;
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hostSystem = hostStdenv.system;
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guestSystem = pkgs.stdenv.hostPlatform.system;
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linuxHostGuestMatrix = {
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x86_64-linux = "${qemuPkg}/bin/qemu-kvm -cpu max";
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armv7l-linux = "${qemuPkg}/bin/qemu-system-arm -machine virt,accel=kvm:tcg -cpu max";
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aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -machine virt,gic-version=max,accel=kvm:tcg -cpu max";
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powerpc64le-linux = "${qemuPkg}/bin/qemu-system-ppc64 -machine powernv";
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powerpc64-linux = "${qemuPkg}/bin/qemu-system-ppc64 -machine powernv";
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x86_64-darwin = "${qemuPkg}/bin/qemu-kvm -cpu max";
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};
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otherHostGuestMatrix = {
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aarch64-darwin = {
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aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -machine virt,gic-version=2,accel=hvf:tcg -cpu max";
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};
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x86_64-darwin = {
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x86_64-linux = "${qemuPkg}/bin/qemu-system-x86_64 -machine type=q35,accel=hvf:tcg -cpu max";
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};
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};
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throwUnsupportedHostSystem =
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let
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supportedSystems = [ "linux" ] ++ (lib.attrNames otherHostGuestMatrix);
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in
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throw "Unsupported host system ${hostSystem}, supported: ${lib.concatStringsSep ", " supportedSystems}";
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throwUnsupportedGuestSystem = guestMap:
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throw "Unsupported guest system ${guestSystem} for host ${hostSystem}, supported: ${lib.concatStringsSep ", " (lib.attrNames guestMap)}";
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in
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if hostStdenv.isLinux then
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linuxHostGuestMatrix.${guestSystem} or "${qemuPkg}/bin/qemu-kvm"
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else
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let
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guestMap = (otherHostGuestMatrix.${hostSystem} or throwUnsupportedHostSystem);
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in
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(guestMap.${guestSystem} or (throwUnsupportedGuestSystem guestMap));
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}
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