some sobotka changes and pkgs refactor

modules/nixos/boot/kernel/default.nix

@@ -9,6 +9,10 @@
 
   hasHardware = hw: builtins.elem hw cfg.hardware;
 in {
+  imports = [
+    ./security.nix
+  ];
+
   options = {
     nixos.boot.kernel = {
       variant = mkOption {

modules/nixos/boot/kernel/security.nix

@@ -0,0 +1,56 @@
+# From https://github.com/hlissner/dotfiles/@hlissner
+{
+  boot.kernel.sysctl = {
+    # The Magic SysRq key is a key combo that allows users connected to the
+    # system console of a Linux kernel to perform some low-level commands.
+    # Disable it, since we don't need it, and is a potential security concern.
+    "kernel.sysrq" = 0;
+
+    ## TCP hardening
+    # Prevent bogus ICMP errors from filling up logs.
+    "net.ipv4.icmp_ignore_bogus_error_responses" = 1;
+    # Reverse path filtering causes the kernel to do source validation of
+    # packets received from all interfaces. This can mitigate IP spoofing.
+    "net.ipv4.conf.default.rp_filter" = 1;
+    "net.ipv4.conf.all.rp_filter" = 1;
+    # Do not accept IP source route packets (we're not a router)
+    "net.ipv4.conf.all.accept_source_route" = 0;
+    "net.ipv6.conf.all.accept_source_route" = 0;
+    # Don't send ICMP redirects (again, we're not a router)
+    "net.ipv4.conf.all.send_redirects" = 0;
+    "net.ipv4.conf.default.send_redirects" = 0;
+    # Refuse ICMP redirects (MITM mitigations)
+    "net.ipv4.conf.all.accept_redirects" = 0;
+    "net.ipv4.conf.default.accept_redirects" = 0;
+    "net.ipv4.conf.all.secure_redirects" = 0;
+    "net.ipv4.conf.default.secure_redirects" = 0;
+    "net.ipv6.conf.all.accept_redirects" = 0;
+    "net.ipv6.conf.default.accept_redirects" = 0;
+    # Protects against SYN flood attacks
+    "net.ipv4.tcp_syncookies" = 1;
+    # Incomplete protection again TIME-WAIT assassination
+    "net.ipv4.tcp_rfc1337" = 1;
+
+    ## TCP optimization
+    # TCP Fast Open is a TCP extension that reduces network latency by packing
+    # data in the sender’s initial TCP SYN. Setting 3 = enable TCP Fast Open for
+    # both incoming and outgoing connections:
+    "net.ipv4.tcp_fastopen" = 3;
+    # Bufferbloat mitigations + slight improvement in throughput & latency
+    "net.ipv4.tcp_congestion_control" = "bbr";
+    "net.core.default_qdisc" = "cake";
+  };
+
+  boot.kernelModules = ["tcp_bbr"];
+
+  security = {
+    # allow wayland lockers to unlock the screen
+    pam.services.hyprlock.text = "auth include login";
+
+    # userland niceness
+    rtkit.enable = true;
+
+    # don't ask for password for wheel group
+    sudo.wheelNeedsPassword = false;
+  };
+}

modules/nixos/hardware/graphics/default.nix

@@ -92,6 +92,7 @@ in {
           commonPackages
           ++ mesaVulkanPackages
           ++ (with pkgs; [
+            vpl-gpu-rt
             intel-media-driver
             intel-compute-runtime
           ]);

modules/nixos/programs/pkgs/default.nix

@@ -15,6 +15,12 @@ in {
         default = true;
         description = "Whether to install default core packages.";
       };
+      common.enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to install common packages.";
+      };
+
       desktop.enable = mkOption {
         type = types.bool;
         default = false;
@@ -37,35 +43,39 @@ in {
     environment.systemPackages = with pkgs;
       mkMerge [
         [
+          pciutils
           ddcutil
           app2unit
           cava
           lm_sensors
-          qt6.full
-          swappy
-          wayfreeze
           socat
-          fuzzel
-          imagemagick
-          wl-screenrec
           jq
           fd
-          libqalculate
           resources
           git
           stow
           tree
           traceroute
-          gnome-disk-utility
-          networkmanagerapplet
           progress
-          wf-recorder
-          inotify-tools
           git-crypt
           gparted
           ntfs3g
         ]
 
+        (mkIf cfg.common.enable [
+          qt6.full
+          swappy
+          wayfreeze
+          imagemagick
+          wl-screenrec
+          libqalculate
+          fuzzel
+          gnome-disk-utility
+          networkmanagerapplet
+          inotify-tools
+          wf-recorder
+        ])
+
         (mkIf cfg.desktop.enable [
           protonup
           winetricks

modules/nixos/services/pipewire/default.nix

@@ -10,7 +10,6 @@ in {
     nixos.services.pipewire.enable = mkEnableOption "Enables pipewire";
   };
   config = mkIf cfg.enable {
-    security.rtkit.enable = true;
     services = {
       pulseaudio.enable = false;
       pipewire = {