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The flag -cpu max leaves QEMU 6.1.0 stuck on some systems, for example when /dev/kvm is not read-writable. This does not happen with -cpu qemu64. Getting stuck like that is a regression in 6.1.0 not yet present in 6.0.0 and should be fixed with 6.2.0 according to early testing with rc1. We should consider reverting this change when we merge QEMU 6.2.0. See #146526. fixes #141596
33 lines
1.3 KiB
Nix
33 lines
1.3 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_${toString net}"''
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];
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qemuSerialDevice = if pkgs.stdenv.hostPlatform.isx86 then "ttyS0"
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else if (with pkgs.stdenv.hostPlatform; isAarch32 || isAarch64 || isPower) then "ttyAMA0"
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else throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'";
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qemuBinary = qemuPkg: {
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x86_64-linux = "${qemuPkg}/bin/qemu-kvm -cpu qemu64";
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armv7l-linux = "${qemuPkg}/bin/qemu-system-arm -enable-kvm -machine virt -cpu host";
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aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -enable-kvm -machine virt,gic-version=host -cpu host";
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powerpc64le-linux = "${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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