Genode Packages collection https://git.sr.ht/~ehmry/genodepkgs/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

286 lines
8.6 KiB

{ config, lib, pkgs, ... }:
with lib;
with import ../tests/lib/qemu-flags.nix { inherit pkgs; };
let
qemu = config.system.build.qemu;
cfg = config.virtualisation;
consoles = lib.concatMapStringsSep " " (c: "console=${c}") cfg.qemu.consoles;
efiPrefix = if (pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64) then
"${pkgs.buildPackages.OVMF.fd}/FV/OVMF"
else if pkgs.stdenv.isAarch64 then
"${pkgs.buildPackages.OVMF.fd}/FV/AAVMF"
else
throw "No EFI firmware available for platform";
efiFirmware = "${efiPrefix}_CODE.fd";
efiVarsDefault = "${efiPrefix}_VARS.fd";
# Shell script to start the VM.
startVM = ''
#! ${pkgs.buildPackages.runtimeShell}
NIX_DISK_IMAGE=$(readlink -f ''${NIX_DISK_IMAGE:-${config.virtualisation.diskImage}})
if ! test -w "$NIX_DISK_IMAGE"; then
${qemu}/bin/qemu-img create -f qcow2 -b $NIX_DISK_IMAGE $TMPDIR/disk.img || exit 1
NIX_DISK_IMAGE=$TMPDIR/disk.img
fi
if ! test -e "$NIX_DISK_IMAGE"; then
${qemu}/bin/qemu-img create -f qcow2 "$NIX_DISK_IMAGE" \
${toString config.virtualisation.diskSize}M || exit 1
fi
# Create a directory for storing temporary data of the running VM.
if [ -z "$TMPDIR" -o -z "$USE_TMPDIR" ]; then
TMPDIR=$(mktemp -d nix-vm.XXXXXXXXXX --tmpdir)
fi
# Start QEMU.
set -v
exec ${qemuBinary qemu} \
-name ${config.system.name} \
-m ${toString config.virtualisation.memorySize} \
-smp ${toString config.virtualisation.cores} \
${concatStringsSep " " config.virtualisation.qemu.networkingOptions} \
${toString config.virtualisation.qemu.options} \
$NIX_DISK_IMAGE \
$QEMU_OPTS \
"$@"
'';
in {
options = {
virtualisation.memorySize = mkOption {
default = 384;
description = ''
Memory size (M) of virtual machine.
'';
};
virtualisation.diskSize = mkOption {
default = 512;
description = ''
Disk size (M) of virtual machine.
'';
};
virtualisation.diskImage = mkOption {
default = "./${config.system.name}.qcow2";
description = ''
Path to the disk image containing the root filesystem.
The image will be created on startup if it does not
exist.
'';
};
virtualisation.emptyDiskImages = mkOption {
default = [ ];
type = types.listOf types.int;
description = ''
Additional disk images to provide to the VM. The value is
a list of size in megabytes of each disk. These disks are
writeable by the VM.
'';
};
virtualisation.graphics = mkOption {
default = true;
description = ''
Whether to run QEMU with a graphics window, or in nographic mode.
Serial console will be enabled on both settings, but this will
change the preferred console.
'';
};
virtualisation.cores = mkOption {
default = 1;
type = types.int;
description = ''
Specify the number of cores the guest is permitted to use.
The number can be higher than the available cores on the
host system.
'';
};
virtualisation.pathsInNixDB = mkOption {
default = [ ];
description = ''
The list of paths whose closure is registered in the Nix
database in the VM. All other paths in the host Nix store
appear in the guest Nix store as well, but are considered
garbage (because they are not registered in the Nix
database in the guest).
'';
};
virtualisation.vlans = mkOption {
default = [ 1 ];
example = [ 1 2 ];
description = ''
Virtual networks to which the VM is connected. Each
number <replaceable>N</replaceable> in this list causes
the VM to have a virtual Ethernet interface attached to a
separate virtual network on which it will be assigned IP
address
<literal>192.168.<replaceable>N</replaceable>.<replaceable>M</replaceable></literal>,
where <replaceable>M</replaceable> is the index of this VM
in the list of VMs.
'';
};
virtualisation.writableStore = mkOption {
default = true; # FIXME
description = ''
If enabled, the Nix store in the VM is made writable by
layering an overlay filesystem on top of the host's Nix
store.
'';
};
virtualisation.writableStoreUseTmpfs = mkOption {
default = true;
description = ''
Use a tmpfs for the writable store instead of writing to the VM's
own filesystem.
'';
};
networking.primaryIPAddress = mkOption {
default = "";
internal = true;
description = "Primary IP address used in /etc/hosts.";
};
virtualisation.qemu = {
options = mkOption {
type = types.listOf types.unspecified;
default = [ ];
example = [ "-vga std" ];
description = "Options passed to QEMU.";
};
consoles = mkOption {
type = types.listOf types.str;
default = let consoles = [ "${qemuSerialDevice},115200n8" "tty0" ];
in if cfg.graphics then consoles else reverseList consoles;
example = [ "console=tty1" ];
description = ''
The output console devices to pass to the kernel command line via the
<literal>console</literal> parameter, the primary console is the last
item of this list.
By default it enables both serial console and
<literal>tty0</literal>. The preferred console (last one) is based on
the value of <option>virtualisation.graphics</option>.
'';
};
networkingOptions = mkOption {
default = [
"-net nic,netdev=user.0,model=virtio"
"-netdev user,id=user.0\${QEMU_NET_OPTS:+,$QEMU_NET_OPTS}"
];
type = types.listOf types.str;
description = ''
Networking-related command-line options that should be passed to qemu.
The default is to use userspace networking (slirp).
If you override this option, be advised to keep
''${QEMU_NET_OPTS:+,$QEMU_NET_OPTS} (as seen in the default)
to keep the default runtime behaviour.
'';
};
diskInterface = mkOption {
default = "ahci";
example = "usb";
type = types.enum [ "ahci" "usb" "virtio" ];
description = "The interface used for the virtual hard disks.";
};
kernel = mkOption {
type = types.path;
description = "Guest kernel.";
};
initrd = mkOption {
type = types.path;
description = "Guest initrd.";
};
cmdline = mkOption {
type = types.str;
description = "Command line options to pass to guest.";
};
};
virtualisation.useBootLoader = mkOption {
default = false;
description = ''
If enabled, the virtual machine will be booted using the
regular boot loader (i.e., GRUB 1 or 2). This allows
testing of the boot loader. If
disabled (the default), the VM directly boots the NixOS
kernel and initial ramdisk, bypassing the boot loader
altogether.
'';
};
virtualisation.useEFIBoot = mkOption {
default = false;
description = ''
If enabled, the virtual machine will provide a EFI boot
manager.
useEFIBoot is ignored if useBootLoader == false.
'';
};
virtualisation.efiVars = mkOption {
default = "./${config.system.name}-efi-vars.fd";
description = ''
Path to nvram image containing UEFI variables. The will be created
on startup if it does not exist.
'';
};
virtualisation.bios = mkOption {
default = null;
type = types.nullOr types.package;
description = ''
An alternate BIOS (such as <package>qboot</package>) with which to start the VM.
Should contain a file named <literal>bios.bin</literal>.
If <literal>null</literal>, QEMU's builtin SeaBIOS will be used.
'';
};
};
config = {
# FIXME: Consolidate this one day.
virtualisation.qemu.options = mkMerge [
(mkIf cfg.useEFIBoot [
"-drive if=pflash,format=raw,unit=0,readonly,file=${efiFirmware}"
"-drive if=pflash,format=raw,unit=1,file=$NIX_EFI_VARS"
])
(mkIf (cfg.bios != null) [ "-bios ${cfg.bios}/bios.bin" ])
(mkIf (!cfg.graphics) [ "-nographic" ])
];
system.build.vm = pkgs.runCommand "nixos-vm" { preferLocalBuild = true; } ''
mkdir -p $out/bin
ln -s ${
pkgs.writeScript "run-nixos-vm" startVM
} $out/bin/run-${config.system.name}-vm
'';
};
}