feat(systemModules:host): add initial host configuration module

used to define general host configuration, including:

- hardware
- name
- admin
- type
- role

system/modules/host/hardware/cpu/amd/default.nix

@@ -0,0 +1,43 @@
+{ lib, config, pkgs, ... }:
+
+let
+  inherit (lib) mkMerge mkEnableOption mkIf versionAtLeast versionOlder;
+  hardware = config.systemModules.host.hardware.cpu; 
+  cfg = hardware.amd;
+  kernelVersion = config.kernelPackages.kernel.version;
+  kernelVersionAtLeast = versionAtLeast kernelVersion;
+  kernelVersionOlder= versionOlder kernelVersion;
+in
+
+{
+  options.systemModules.host.hardware.cpu.amd = {
+    pstate.enable = mkEnableOption "Enable pstate amd module";
+  };
+
+  config = mkIf (builtins.elem hardware.type ["amd"]) {
+    environment.systemPackages = [pkgs.amdctl];
+    hardware.cpu.amd.updateMicrocode = true;
+    boot = mkMerge [
+      {
+        kernelModules = [
+          "amd-pstate"
+          "amd-kvm" # virtulization
+          "msr" # required for amdctl
+        ];
+      }
+      
+      (mkIf (cfg.pstate.enable && (kernelVersionAtLeast "5.27") && (kernelVersionOlder "6.1")) {
+        kernelParams = ["initcall_blacklist-acpi_cpufreq_init"];
+        kernelModules = ["amd-pstate"];
+      })
+
+      (mkIf (cfg.pstate.enable && (kernelVersionAtLeast "6.1") && (kernelVersionOlder "6.3")) {
+        kernelParams = ["amd_pstate=passive"];
+      })
+
+      (mkIf (cfg.pstate.enable && (kernelVersionAtLeast "6.3")) {
+        kernelParams = ["amd_pstate=active"];
+      })
+    ];
+  };
+}