nixpkgs/nixos/lib/qemu-common.nix
Silvan Mosberger 4f0dadbf38 treewide: format all inactive Nix files
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build a08b3a4d19.tar.gz \
      --argstr baseRev b32a094368
    result/bin/apply-formatting $NIXPKGS_PATH
2024-12-10 20:26:33 +01:00

71 lines
2.9 KiB
Nix

# QEMU-related utilities shared between various Nix expressions.
{ lib, pkgs }:
let
zeroPad =
n:
lib.optionalString (n < 16) "0"
+ (if n > 255 then throw "Can't have more than 255 nets or nodes!" else 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_${toString net}"''
];
qemuSerialDevice =
if with pkgs.stdenv.hostPlatform; isx86 || isLoongArch64 || isMips64 || isRiscV then
"ttyS0"
else if (with pkgs.stdenv.hostPlatform; isAarch || isPower) then
"ttyAMA0"
else
throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'";
qemuBinary =
qemuPkg:
let
hostStdenv = qemuPkg.stdenv;
hostSystem = hostStdenv.system;
guestSystem = pkgs.stdenv.hostPlatform.system;
linuxHostGuestMatrix = {
x86_64-linux = "${qemuPkg}/bin/qemu-system-x86_64 -machine accel=kvm:tcg -cpu max";
armv7l-linux = "${qemuPkg}/bin/qemu-system-arm -machine virt,accel=kvm:tcg -cpu max";
aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -machine virt,gic-version=max,accel=kvm:tcg -cpu max";
powerpc64le-linux = "${qemuPkg}/bin/qemu-system-ppc64 -machine powernv";
powerpc64-linux = "${qemuPkg}/bin/qemu-system-ppc64 -machine powernv";
riscv32-linux = "${qemuPkg}/bin/qemu-system-riscv32 -machine virt";
riscv64-linux = "${qemuPkg}/bin/qemu-system-riscv64 -machine virt";
x86_64-darwin = "${qemuPkg}/bin/qemu-system-x86_64 -machine accel=kvm:tcg -cpu max";
};
otherHostGuestMatrix = {
aarch64-darwin = {
aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -machine virt,gic-version=2,accel=hvf:tcg -cpu max";
inherit (otherHostGuestMatrix.x86_64-darwin) x86_64-linux;
};
x86_64-darwin = {
x86_64-linux = "${qemuPkg}/bin/qemu-system-x86_64 -machine type=q35,accel=hvf:tcg -cpu max";
};
};
throwUnsupportedHostSystem =
let
supportedSystems = [ "linux" ] ++ (lib.attrNames otherHostGuestMatrix);
in
throw "Unsupported host system ${hostSystem}, supported: ${lib.concatStringsSep ", " supportedSystems}";
throwUnsupportedGuestSystem =
guestMap:
throw "Unsupported guest system ${guestSystem} for host ${hostSystem}, supported: ${lib.concatStringsSep ", " (lib.attrNames guestMap)}";
in
if hostStdenv.hostPlatform.isLinux then
linuxHostGuestMatrix.${guestSystem} or "${qemuPkg}/bin/qemu-kvm"
else
let
guestMap = (otherHostGuestMatrix.${hostSystem} or throwUnsupportedHostSystem);
in
(guestMap.${guestSystem} or (throwUnsupportedGuestSystem guestMap));
}