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