Add back steam deck, again?

hosts/jupiter/boot/default.nix

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+{ config, pkgs, ... }:
+{
+  boot = {
+    kernelPackages = pkgs.unstable.linuxPackages_latest;
+    kernel.sysctl."vm.max_map_count" = 2147483642;
+    kernelParams = [
+      "amd_iommu=on"
+      "iommu=pt"
+      "nested=1"
+      "transparent_hugepage=never"
+    ];
+
+    initrd.systemd = {
+      enable = true;
+      services.root-reset = {
+        description = "Reset root and snapshot last boot";
+        wantedBy = [ "initrd.target" ];
+        before = [ "sysroot.mount" ];
+        after = [ "dev-${config.networking.hostName}-root.device" ];
+        unitConfig.DefaultDependencies = "no";
+        serviceConfig.Type = "oneshot";
+        script = ''
+          mkdir -p /mnt
+          mount /dev/${config.networking.hostName}/root /mnt
+
+          if [[ -e /mnt/prev ]]; then
+            btrfs subvolume delete /mnt/prev
+          fi
+
+          btrfs subvolume snapshot /mnt/root /mnt/prev
+
+          btrfs subvolume list -o /mnt/root | cut -f9 -d' ' | while read subvolume; do
+            btrfs subvolume delete "/mnt/$subvolume"
+          done
+
+          btrfs subvolume delete /mnt/root
+          btrfs subvolume create /mnt/root
+
+          umount /mnt
+        '';
+      };
+    };
+  };
+}

hosts/jupiter/default.nix

@@ -0,0 +1,17 @@
+{ jovian, ... }:
+{
+  imports = [
+    ./boot
+    ./disko
+    ./hardware
+    ./wireguard
+    ../../modules/system
+  ];
+
+  system.lanzaboote.enable = true;
+  system.libvirtd.enable = true;
+
+  jovian.steamos.useSteamOSConfig = true;
+
+  networking.hostName = "jupiter";
+}

hosts/jupiter/disko/default.nix

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+{ disko, config, ... }:
+{
+  imports = [ disko.nixosModules.disko ];
+
+  disko.devices = {
+    disk = {
+      "${config.networking.hostName}" = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              priority = 1;
+              size = "2G";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "${config.networking.hostName}-disk";
+                settings.allowDiscards = true;
+                passwordFile = "/tmp/secret.key";
+                content = {
+                  type = "lvm_pv";
+                  vg = "${config.networking.hostName}";
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+
+    lvm_vg = {
+      "${config.networking.hostName}" = {
+        type = "lvm_vg";
+        lvs = {
+          root = {
+            size = "100%";
+            content = {
+              type = "btrfs";
+              extraArgs = [ "-f" ];
+              subvolumes = {
+                "/root" = {
+                  mountpoint = "/";
+                  mountOptions = [ "compress=zstd" "noatime" "ssd" ];
+                };
+                "/prev" = {
+                  mountpoint = "/prev";
+                  mountOptions = [ "compress=zstd" "noatime" "ssd" ];
+                };
+                "/nix" = {
+                  mountpoint = "/nix";
+                  mountOptions = [ "compress=zstd" "noatime" "ssd" ];
+                };
+
+                # Impermanence
+                "/persist" = {
+                  mountpoint = "/persist";
+                  mountOptions = [ "compress=zstd" "noatime" "ssd" ];
+                };
+                "/persist/.snapshots" = { };
+
+                "/jimbo" = {
+                  mountpoint = "/persist/home/jimbo";
+                  mountOptions = [ "compress=zstd" "noatime" "ssd" ];
+                };
+                "/jimbo/.snapshots" = { };
+              };
+            };
+          };
+          swap = {
+            size = "8G";
+            content = {
+              type = "swap";
+              discardPolicy = "both";
+            };
+          };
+        };
+      };
+    };
+  };
+
+  # Needed for impermanence
+  fileSystems = {
+    "/persist".neededForBoot = true;
+    "/persist/home/jimbo".neededForBoot = true;
+  };
+}

hosts/jupiter/hardware/default.nix

@@ -0,0 +1,35 @@
+{ config, lib, modulesPath, ... }:
+{
+  boot = {
+    initrd = {
+      availableKernelModules = [
+        "nvme"
+        "xhci_pci"
+        "ahci"
+        "usbhid"
+        "usb_storage"
+        "sd_mod"
+      ];
+      kernelModules = [
+        "dm-snapshot"
+        "vfio"
+        "vfio_pci"
+        "vfio_iommu_type1"
+        "kvm-amd"
+      ];
+    };
+  };
+
+  fileSystems = {
+    # Remote
+    "/home/jimbo/JimboNFS" = {
+      device = "${config.ips.wgSpan}.1:/export/JimboNFS";
+      fsType = "nfs4";
+      options = [ "x-systemd.automount" "_netdev" "nofail" "noauto" ];
+    };
+  };
+
+  networking.useDHCP = lib.mkDefault true;
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hosts/jupiter/wireguard/default.nix

@@ -0,0 +1,23 @@
+{ lib, config, ... }:
+{
+  networking = {
+    firewall = {
+      allowedUDPPorts = [ 51820 ];
+      trustedInterfaces = [ "wgc" ];
+    };
+
+    wireguard.interfaces.wgc = {
+      ips = [ "10.100.0.21/24" ];
+      listenPort = 51820;
+      privateKey = config.secrets.wgClientPriv;
+      peers = [
+        { # Cyberspark Server
+          publicKey = "qnOT/lXOJMaQgDUdXpyfGZB2IEyUouRje2m/bCe9ux8=";
+          allowedIPs = [ "10.100.0.0/24" ];
+          endpoint = "sv.${config.domains.jim1}:51820";
+          persistentKeepalive = 25;
+        }
+      ];
+    };
+  };
+}