hosts: Improve the passthrough experience

hosts/generic.nix

@@ -54,7 +54,7 @@ in
   };
 
   # We don't tolerate non-free software, except for Steam and Linux firmware
-  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "firmwareLinuxNonfree" ];
+  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "firmwareLinuxNonfree" "steam" "steam-original" "steam-runtime"];
 
   services = {
     connman = {

hosts/miku.nix

@@ -37,14 +37,68 @@ in {
       gamemode # Custom package
       key-mapper # Custom package
       replaysorcery # Custom package
+      evdev-proxy #  Custom package
       scream
+      steam
       linuxPackages_zen.vendor-reset
     ];
 
     sessionVariables = {
       # Prevent us from having to always type it out
       #NIXOS_CONFIG = "\${HOME}/Development/Personal/nixos-config/hosts/miku.nix";
-    };    
+    };
+
+    etc = {
+      "evdev-proxy/config.toml".source = pkgs.writeText "config.toml" ''
+        log_level = "INFO"
+
+        [[device]]
+          [device.Simple]
+            name = "EvdevProxyMouse"
+            vendor = 0x1337
+            model = 0x1337
+            class = "Mouse"
+            [[device.Simple.selector]]
+              USBIDClass = {vendor=0x046d, model=0xc531, class="Mouse"}
+            [[device.Simple.selector]]
+              USBIDClass = {vendor=0x046d, model=0xc07c, class="Mouse"}
+        [[device]]
+          [device.Simple]
+            name = "EvdevProxyTartarus"
+            vendor = 0x1337
+            model = 0x1338
+            class = "Mouse"
+            [[device.Simple.selector]]
+              USBIDClass = {vendor=0x1532, model=0x022b, class="Keyboard"}
+            [[device.Simple.selector]]
+              EVDEVClass = {phys="\"key-mapper\""}
+      '';
+      "libvirt/hooks/qemu" = {
+        source = pkgs.writeText "qemu" ''
+          #!/bin/sh
+          guest=$1
+          phase=$2
+          state=$3
+          what=$4
+
+          if [[ "$guest" = "win10" ]]; then
+              case "$phase" in
+                  "prepare")
+                      sudo -u alexander systemctl --user start evdev-proxy
+                      ;;
+                  "start")
+                      sudo -u alexander systemctl --user start scream
+                      ;;
+                  "stopped")
+                      sudo -u alexander systemctl --user stop scream
+                      sudo -u alexander systemctl --user stop evdev-proxy
+              esac
+          end
+        '';
+
+        mode = "0755";
+      };
+    };
   };
 
   networking = {
@@ -98,6 +152,12 @@ in {
     xserver.videoDrivers = [ "amdgpu" ];
     udev.extraRules = ''
       KERNEL=="uinput", GROUP="input"
+
+      # This rule allows the input group to access /dev/uinput device to create virtual input devices
+      KERNEL=="uinput", SUBSYSTEM=="misc", GROUP="input", MODE="660"
+
+      # Create rules for your virtual devices to get persistent names
+      KERNEL=="event*", SUBSYSTEM=="input", ATTRS{name}=="EvdevProxy*", SYMLINK+="input/by-id/virtual-event-$attr{name}"
     '';
 
     sshd.enable = true;
@@ -106,18 +166,18 @@ in {
   virtualisation.libvirtd = {
     enable = true;
     qemuOvmf = true;
-    qemuRunAsRoot = false;
+    #qemuRunAsRoot = false;
+    qemuPackage = unstable.qemu;
     qemuVerbatimConfig = ''
-      user = "alexander"
+      seccomp_sandbox = 0
       cgroup_device_acl = [
-        "/dev/null", "/dev/zero", "/dev/full",
+      	"/dev/null", "/dev/full", "/dev/zero", 
-        "/dev/random", "/dev/kvm", "/dev/kqemu",
+      	"/dev/random", "/dev/urandom",
-        "/dev/rtc", "/dev/hpet", "/dev/ptmx",
+      	"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
-        "/dev/input/by-id/usb-Logitech_G700s_Rechargeable_Gaming_Mouse_93DF48160007-event-mouse",
+      	"/dev/rtc","/dev/hpet",
-        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-event-kbd",
+        "/dev/input/by-id/usb-Logitech_USB_Receiver-if02-event-mouse",
-        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-if01-event-kbd",
+        "/dev/input/by-id/usb-Razer_Razer_Tartarus_V2-event-kbd",
-        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-if02-event-mouse",
+        "/dev/input/by-id/virtual-event-EvdevProxyMouse"
-        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-event-if01"
       ]
     '';
   };
@@ -143,6 +203,15 @@ in {
           Restart = "always";
         };
       };
+      key-mapper = {
+        description = "A tool to change the mapping of your input device buttons";
+        wantedBy = [ "default.target" ];
+        serviceConfig = {
+          Type = "simple";
+          ExecStart = "${pkgs.key-mapper}/bin/key-mapper-service";
+          Restart = "always";
+        };
+      };
       replaysorcery = {
         description = "An open-source, instant-replay solution for Linux";
         #wantedBy = [ "default.target" ];
@@ -153,6 +222,15 @@ in {
           Restart = "always";
         };
       };
+      evdev-proxy = {
+        description = "Creates virtual device to proxy evdev devices events";
+        #wantedBy = [ "default.target" ];
+        serviceConfig = {
+          Type = "simple";
+          ExecStart = "${pkgs.evdev-proxy}/bin/evdev-proxy";
+          Restart = "always";
+        };
+      };
       gamemode = {
         description = "A daemon/lib combo for Linux that allows games to request a set of optimisations be temporarily applied to the host OS.";
         wantedBy = [ "default.target" ];