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82 lines
2.8 KiB
Nix
82 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.virtualisation.rosetta;
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inherit (lib) types;
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in
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{
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options = {
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virtualisation.rosetta.enable = lib.mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Whether to enable [Rosetta](https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment) support.
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This feature requires the system to be a virtualised guest on an Apple silicon host.
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The default settings are suitable for the [UTM](https://docs.getutm.app/) virtualisation [package](https://search.nixos.org/packages?channel=unstable&show=utm&from=0&size=1&sort=relevance&type=packages&query=utm).
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Make sure to select 'Apple Virtualization' as the virtualisation engine and then tick the 'Enable Rosetta' option.
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'';
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};
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virtualisation.rosetta.mountPoint = lib.mkOption {
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type = types.str;
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default = "/run/rosetta";
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internal = true;
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description = lib.mdDoc ''
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The mount point for the Rosetta runtime inside the guest system.
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The proprietary runtime is exposed through a VirtioFS directory share and then mounted at this directory.
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'';
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};
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virtualisation.rosetta.mountTag = lib.mkOption {
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type = types.str;
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default = "rosetta";
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description = lib.mdDoc ''
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The VirtioFS mount tag for the Rosetta runtime, exposed by the host's virtualisation software.
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If supported, your virtualisation software should provide instructions on how register the Rosetta runtime inside Linux guests.
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These instructions should mention the name of the mount tag used for the VirtioFS directory share that contains the Rosetta runtime.
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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assertions = [
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{
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assertion = pkgs.stdenv.hostPlatform.isAarch64;
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message = "Rosetta is only supported on aarch64 systems";
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}
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];
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fileSystems."${cfg.mountPoint}" = {
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device = cfg.mountTag;
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fsType = "virtiofs";
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};
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nix.settings = {
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extra-platforms = [ "x86_64-linux" ];
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extra-sandbox-paths = [
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"/run/binfmt"
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cfg.mountPoint
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];
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};
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boot.binfmt.registrations.rosetta = {
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interpreter = "${cfg.mountPoint}/rosetta";
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# The required flags for binfmt are documented by Apple:
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# https://developer.apple.com/documentation/virtualization/running_intel_binaries_in_linux_vms_with_rosetta
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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fixBinary = true;
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matchCredentials = true;
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preserveArgvZero = false;
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# Remove the shell wrapper and call the runtime directly
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wrapInterpreterInShell = false;
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};
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};
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}
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