77 lines
1.8 KiB
Nix
77 lines
1.8 KiB
Nix
|
# Xen hypervisor support.
|
||
|
|
|
||
|
|
{ config, pkgs, ... }:
|
||
|
|
|
||
|
|
with pkgs.lib;
|
||
|
|
|
||
|
|
let cfg = config.virtualisation.xen; in
|
||
|
|
|
||
|
|
{
|
||
|
|
###### interface
|
||
|
|
|
||
|
|
options = {
|
||
|
|
|
||
|
|
virtualisation.xen.enable =
|
||
|
|
mkOption {
|
||
|
|
default = false;
|
||
|
|
description =
|
||
|
|
''
|
||
|
|
Setting this option enables the Xen hypervisor, a
|
||
|
|
virtualisation technology that allows multiple virtual
|
||
|
|
machines, known as <emphasis>domains</emphasis>, to run
|
||
|
|
concurrently on the physical machine. NixOS runs as the
|
||
|
|
privileged <emphasis>Domain 0</emphasis>. This option
|
||
|
|
requires a reboot to take effect.
|
||
|
|
'';
|
||
|
|
};
|
||
|
|
|
||
|
|
virtualisation.xen.bootParams =
|
||
|
|
mkOption {
|
||
|
|
default = "";
|
||
|
|
description =
|
||
|
|
''
|
||
|
|
Parameters passed to the Xen hypervisor at boot time.
|
||
|
|
'';
|
||
|
|
};
|
||
|
|
|
||
|
|
virtualisation.xen.domain0MemorySize =
|
||
|
|
mkOption {
|
||
|
|
default = 0;
|
||
|
|
example = 512;
|
||
|
|
description =
|
||
|
|
''
|
||
|
|
Amount of memory (in MiB) allocated to Domain 0 on boot.
|
||
|
|
If set to 0, all memory is assigned to Domain 0.
|
||
|
|
'';
|
||
|
|
};
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
###### implementation
|
||
|
|
|
||
|
|
config = mkIf cfg.enable {
|
||
|
|
|
||
|
|
environment.systemPackages = [ pkgs.xen ];
|
||
|
|
|
||
|
|
# Domain 0 requires a pvops-enabled kernel.
|
||
|
|
boot.kernelPackages = pkgs.linuxPackages_2_6_32_xen;
|
||
|
|
|
||
|
|
# The radeonfb kernel module causes the screen to go black as soon
|
||
|
|
# as it's loaded, so don't load it.
|
||
|
|
boot.blacklistedKernelModules = [ "radeonfb" ];
|
||
|
|
|
||
|
|
virtualisation.xen.bootParams =
|
||
|
|
[ "loglvl=all" "guest_loglvl=all" ] ++
|
||
|
|
optional (cfg.domain0MemorySize != 0) "dom0_mem=${toString cfg.domain0MemorySize}M";
|
||
|
|
|
||
|
|
system.extraSystemBuilderCmds =
|
||
|
|
''
|
||
|
|
ln -s ${pkgs.xen}/boot/xen.gz $out/xen.gz
|
||
|
|
echo "${toString cfg.bootParams}" > $out/xen-params
|
||
|
|
'';
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|