From 037bee53a4e719ba3ed4ccc48b3c6a2edc52b883 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Tue, 22 Sep 2026 14:43:25 +0200
Subject: skadhi: initial commit

---
 hosts/skadhi/default.nix | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
 hosts/skadhi/hw.nix      | 72 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 159 insertions(+)
 create mode 100644 hosts/skadhi/default.nix
 create mode 100644 hosts/skadhi/hw.nix

(limited to 'hosts/skadhi')

diff --git a/hosts/skadhi/default.nix b/hosts/skadhi/default.nix
new file mode 100644
index 00000000..e9d5cc59
--- /dev/null
+++ b/hosts/skadhi/default.nix
@@ -0,0 +1,87 @@
+{ flake, flakeInputs, pkgs, config, lib, ... }:
+{
+  imports = with flake.nixosModules.systemProfiles; [
+    ./hw.nix
+    tmpfs-root default-locale openssh niri-unstable networkmanager lanzaboote zswap
+    flakeInputs.nixVirt.nixosModules.default
+  ];
+
+  config = {
+    system.stateVersion = "26.05";
+
+    fileSystems."/persistent".neededForBoot = true;
+    environment.persistence."/persistent" = {
+      hideMounts = true;
+      directories = [
+        "/nix"
+        "/root"
+        "/home"
+        "/var/log"
+        "/var/lib/nixos"
+        "/var/lib/sops-nix"
+        "/var/lib/systemd"
+      ];
+      timezone = true;
+    };
+
+    boot = {
+      initrd.systemd = {
+        emergencyAccess = config.users.users.root.hashedPassword;
+        extraBin = {
+          "vim" = lib.getExe pkgs.vim;
+          "grep" = lib.getExe pkgs.gnugrep;
+        };
+      };
+
+      lanzaboote.configurationLimit = 15;
+      loader = {
+        efi.canTouchEfiVariables = true;
+        timeout = null;
+      };
+
+      plymouth.enable = true;
+
+      kernelPackages = pkgs.linuxPackages_7_2;
+      consoleLogLevel = 3;
+      kernelParams = [
+        "quiet"
+        "boot.shell_on_fail"
+        "udev.log_priority=3"
+        "rd.systemd.show_status=auto"
+        "plymouth.use-simpledrm"
+      ];
+
+      tmp.useTmpfs = true;
+    };
+
+    services.timesyncd.enable = false;
+    services.chrony = {
+      enable = true;
+      enableNTS = true;
+      servers = [];
+      extraConfig = ''
+        pool time.cloudflare.com iburst nts
+        pool nts.netnod.se prefer iburst nts
+        server ptbtime1.ptb.de prefer iburst nts
+        server ptbtime2.ptb.de prefer iburst nts
+        server ptbtime3.ptb.de prefer iburst nts
+        server ptbtime4.ptb.de prefer iburst nts
+        pool ntppool1.time.nl prefer iburst nts
+        pool ntppool2.time.nl prefer iburst nts
+
+        authselectmode require
+        minsources 3
+
+        nocerttimecheck 1
+
+        leapsectz right/UTC
+
+        makestep 0.1 3
+
+        cmdport 0
+      '';
+    };
+
+    services.userborn.importLegacyState = false;
+  };
+}
diff --git a/hosts/skadhi/hw.nix b/hosts/skadhi/hw.nix
new file mode 100644
index 00000000..b95fc24c
--- /dev/null
+++ b/hosts/skadhi/hw.nix
@@ -0,0 +1,72 @@
+{ flake, flakeInputs, pkgs, config, lib, ... }:
+{
+  imports = with flake.nixosModules.systemProfiles; [
+    flakeInputs.nixos-hardware.nixosModules.framework-13-7040-amd
+    disko
+  ];
+
+  config = {
+    hardware.framework.laptop13.audioEnhancement.enable = true;
+    services.fstrim.enable = false;
+
+    nixpkgs.system = "x86_64-linux";
+
+    disko.devices = {
+      disk.nvm = {
+        type = "disk";
+        device = "/dev/nvm0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [
+                  "fmask=0033" "dmask=0022"
+                ];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "nvm";
+                extraFormatArgs = [
+                  "--cipher" "aegis128-random"
+                  "--key-size" "128"
+                  "--integrity" "aead"
+                ];
+                content = {
+                  type = "btrfs";
+                  extraArgs = let
+                    subvols = ["/persistent"] ++ map (p: "/persistent/${p}") ["/nix" "/home" "/var/log"];
+                    restricted = map (p: "/persistent/${p}") ["/root"];
+                  in [
+                    "--csum" "blake2"
+                    "--compress" "zstd:15"
+                    "--rootdir" (pkgs.runCommand "rootdir" {
+                    } ''
+                      install -d ${lib.escapeShellArgs (map (p: "$out/${p}") subvols)}
+                      install -m 0700 -d ${lib.escapeShellArgs (map (p: "$out/${p}") restricted)}
+                    '')
+                  ] ++ lib.concatMap (p: ["--subvol" p]) subvols;
+                  subvolumes = {
+                    "/persistent".mountpoint = "/persistent";
+                    "/swap" = {
+                      mountpoint = "/.swap";
+                      swap.swapfile.size = "96G";
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}
-- 
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