Add a new theme and tamper with some files

hosts/firefly/system/boot/default.nix

@@ -0,0 +1,50 @@
+{ pkgs, ... }:
+let
+  commonKernelParams = [
+    # Nvidia settings
+    "nvidia_drm.fbdev=1"
+    "nouveau.config=NvGspRm=1"
+
+    # VM/GPU passthrough
+    "amd_iommu=on"
+    "iommu=pt"
+    "nested=1"
+
+    # Virtualization nonsense
+    "transparent_hugepage=never"
+
+    # Isolate devices into IOMMU groups
+    "pcie_acs_override=downstream,multifunction"
+    "pci=routeirq"
+  ];              
+in {
+  boot = {
+    kernelPackages = pkgs.unstable.linuxPackages_zen;
+    blacklistedKernelModules = [
+      "pcspkr"
+    ];               
+    kernel.sysctl."vm.max_map_count" = 2147483642;       
+    kernelParams = commonKernelParams ++ [
+      "vfio-pci.ids=10de:1f82,10de:10fa"
+    ];
+
+    # Encryption and TPM
+    initrd = {
+      systemd.enable = true;
+      luks.devices = {
+        "crypt-ssd" = {
+          device = "/dev/disk/by-uuid/52110c74-19b6-40ef-9710-e6c9b157005f";
+          preLVM = true;
+          allowDiscards = true;
+        };
+      };
+    };
+  };
+
+  # Additional entry to boot from the second GPU
+  specialisation = {
+    gputwo.configuration = {
+      boot.kernelParams = commonKernelParams ++ [ "vfio-pci.ids=10de:2504,10de:228e" ];
+    };
+  };
+}