80 lines
2.3 KiB
Nix
80 lines
2.3 KiB
Nix
{ config, options, lib, ... }:
|
|
with lib;
|
|
let
|
|
cfgSev = config.hardware.cpu.amd.sev;
|
|
cfgSevGuest = config.hardware.cpu.amd.sevGuest;
|
|
|
|
optionsFor = device: group: {
|
|
enable = mkEnableOption (lib.mdDoc "access to the AMD ${device} device");
|
|
user = mkOption {
|
|
description = lib.mdDoc "Owner to assign to the ${device} device.";
|
|
type = types.str;
|
|
default = "root";
|
|
};
|
|
group = mkOption {
|
|
description = lib.mdDoc "Group to assign to the ${device} device.";
|
|
type = types.str;
|
|
default = group;
|
|
};
|
|
mode = mkOption {
|
|
description = lib.mdDoc "Mode to set for the ${device} device.";
|
|
type = types.str;
|
|
default = "0660";
|
|
};
|
|
};
|
|
in
|
|
with lib; {
|
|
options.hardware.cpu.amd.sev = optionsFor "SEV" "sev";
|
|
|
|
options.hardware.cpu.amd.sevGuest = optionsFor "SEV guest" "sev-guest";
|
|
|
|
config = mkMerge [
|
|
# /dev/sev
|
|
(mkIf cfgSev.enable {
|
|
assertions = [
|
|
{
|
|
assertion = hasAttr cfgSev.user config.users.users;
|
|
message = "Given user does not exist";
|
|
}
|
|
{
|
|
assertion = (cfgSev.group == options.hardware.cpu.amd.sev.group.default) || (hasAttr cfgSev.group config.users.groups);
|
|
message = "Given group does not exist";
|
|
}
|
|
];
|
|
|
|
boot.extraModprobeConfig = ''
|
|
options kvm_amd sev=1
|
|
'';
|
|
|
|
users.groups = optionalAttrs (cfgSev.group == options.hardware.cpu.amd.sev.group.default) {
|
|
"${cfgSev.group}" = { };
|
|
};
|
|
|
|
services.udev.extraRules = with cfgSev; ''
|
|
KERNEL=="sev", OWNER="${user}", GROUP="${group}", MODE="${mode}"
|
|
'';
|
|
})
|
|
|
|
# /dev/sev-guest
|
|
(mkIf cfgSevGuest.enable {
|
|
assertions = [
|
|
{
|
|
assertion = hasAttr cfgSevGuest.user config.users.users;
|
|
message = "Given user does not exist";
|
|
}
|
|
{
|
|
assertion = (cfgSevGuest.group == options.hardware.cpu.amd.sevGuest.group.default) || (hasAttr cfgSevGuest.group config.users.groups);
|
|
message = "Given group does not exist";
|
|
}
|
|
];
|
|
|
|
users.groups = optionalAttrs (cfgSevGuest.group == options.hardware.cpu.amd.sevGuest.group.default) {
|
|
"${cfgSevGuest.group}" = { };
|
|
};
|
|
|
|
services.udev.extraRules = with cfgSevGuest; ''
|
|
KERNEL=="sev-guest", OWNER="${user}", GROUP="${group}", MODE="${mode}"
|
|
'';
|
|
})
|
|
];
|
|
}
|