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{ config, lib, ... }:
with lib;
let
cfg = config.hardware.cpu.intel.sgx;
defaultPrvGroup = "sgx_prv";
in
{
options.hardware.cpu.intel.sgx.enableDcapCompat = mkOption {
description = ''
Whether to enable backward compatibility for SGX software build for the
out-of-tree Intel SGX DCAP driver.
Creates symbolic links for the SGX devices <literal>/dev/sgx_enclave</literal>
and <literal>/dev/sgx_provision</literal> to make them available as
<literal>/dev/sgx/enclave</literal> and <literal>/dev/sgx/provision</literal>,
respectively.
'';
type = types.bool;
default = true;
};
options.hardware.cpu.intel.sgx.provision = {
enable = mkEnableOption "access to the Intel SGX provisioning device";
user = mkOption {
description = "Owner to assign to the SGX provisioning device.";
type = types.str;
default = "root";
};
group = mkOption {
description = "Group to assign to the SGX provisioning device.";
type = types.str;
default = defaultPrvGroup;
};
mode = mkOption {
description = "Mode to set for the SGX provisioning device.";
type = types.str;
default = "0660";
};
};
config = mkMerge [
(mkIf cfg.provision.enable {
assertions = [
{
assertion = hasAttr cfg.provision.user config.users.users;
message = "Given user does not exist";
}
{
assertion = (cfg.provision.group == defaultPrvGroup) || (hasAttr cfg.provision.group config.users.groups);
message = "Given group does not exist";
}
];
users.groups = optionalAttrs (cfg.provision.group == defaultPrvGroup) {
"${cfg.provision.group}" = { };
};
services.udev.extraRules = with cfg.provision; ''
SUBSYSTEM=="misc", KERNEL=="sgx_provision", OWNER="${user}", GROUP="${group}", MODE="${mode}"
'';
})
(mkIf cfg.enableDcapCompat {
services.udev.extraRules = ''
SUBSYSTEM=="misc", KERNEL=="sgx_enclave", SYMLINK+="sgx/enclave"
SUBSYSTEM=="misc", KERNEL=="sgx_provision", SYMLINK+="sgx/provision"
'';
})
];
}
|