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a2465483e8
This will try to use KVM if available and fallback to using TCG if not. Useful for nested virtualisation of arm on x86.
33 lines
1.4 KiB
Nix
33 lines
1.4 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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[ "-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_${toString net}"''
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];
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qemuSerialDevice = if pkgs.stdenv.hostPlatform.isx86 || pkgs.stdenv.hostPlatform.isRiscV then "ttyS0"
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else if (with pkgs.stdenv.hostPlatform; isAarch32 || isAarch64 || isPower) then "ttyAMA0"
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else throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'";
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qemuBinary = qemuPkg: {
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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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}.${pkgs.stdenv.hostPlatform.system} or "${qemuPkg}/bin/qemu-kvm";
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}
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