Add back vfio, remove postgres

flake.lock

@@ -23,11 +23,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1650522846,
-        "narHash": "sha256-SxWHXRI3qJwswyXAtzsi6PKVY3KLNNnb072KaJthII8=",
+        "lastModified": 1653463224,
+        "narHash": "sha256-bUxKhqZhki2vPzFTl8HOo1m7pagF7WzY1MZiso8U5ws=",
         "owner": "nixos",
         "repo": "nixos-hardware",
-        "rev": "6b4ebea9093c997c5f275c820e679108de4871ab",
+        "rev": "39a7bfc496d2ddfce73fe9542af1f2029ba4fe39",
         "type": "github"
       },
       "original": {
@@ -38,11 +38,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1652020977,
-        "narHash": "sha256-9hDlNbrxzD/pLlXmoQ6gzxbYiSAKrj7uHYUWNByLFlI=",
+        "lastModified": 1653565689,
+        "narHash": "sha256-xdJ6bmPxDPIMItZJWsDxopPXUTAFPWMkNkyOOcptWSc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3c5ae9be1f18c790ea890ef8decbd0946c0b4c04",
+        "rev": "9bc0e974545d5bc4c24e1ed047be0dc4e30e494b",
         "type": "github"
       },
       "original": {
@@ -54,11 +54,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1652082323,
-        "narHash": "sha256-7GSVLvfCJtH9dJ3om9Lg4fsi9UKvoxxR69gUTcx0ol8=",
+        "lastModified": 1653581809,
+        "narHash": "sha256-Uvka0V5MTGbeOfWte25+tfRL3moECDh1VwokWSZUdoY=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2a3aac479caeba0a65b2ad755fe5f284f1fde74d",
+        "rev": "83658b28fe638a170a19b8933aa008b30640fbd1",
         "type": "github"
       },
       "original": {

system/starlight/default.nix

@@ -5,7 +5,7 @@
     ./boot-config.nix
     ./hardware-configuration.nix
     ./scripts.nix
-    ./postgres.nix
+    ./vfio.nix
     ../../sets/builder.nix
     ../../sets/fpga.nix
     ../../sets/hacking.nix

system/starlight/postgres.nix

@@ -1,17 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  services.postgresql = {
-    enable = true;
-    package = pkgs.postgresql_14;
-    extraPlugins = with config.services.postgresql.package.pkgs; [ postgis ];
-
-    ensureDatabases = [ "osm" ];
-    ensureUsers = [{
-      name = "artemis";
-      ensurePermissions = {
-        "DATABASE osm" = "ALL PRIVILEGES";
-      };
-    }];
-  };
-}

system/starlight/vfio.nix

@@ -0,0 +1,34 @@
+{ pkgs, pkgs-unstable, ... }:
+
+# based on https://alexbakker.me/post/nixos-pci-passthrough-qemu-vfio.html
+{
+  environment.systemPackages = [
+    pkgs-unstable.looking-glass-client
+    pkgs.scream
+  ];
+
+  boot.initrd = {
+    availableKernelModules = [ "amdgpu" "vfio-pci" ];
+    preDeviceCommands = ''
+      echo vfio-pci > /sys/bus/pci/devices/0000:0b:00.0/driver_override
+      echo vfio-pci > /sys/bus/pci/devices/0000:0b:00.1/driver_override
+      modprobe -i vfio-pci
+    '';
+  };
+
+  systemd.tmpfiles.rules = [
+    "f /dev/shm/scream 0660 artemis qemu-libvirtd -"
+    "f /dev/shm/looking-glass 0660 artemis qemu-libvirtd -"
+  ];
+
+  systemd.user.services.scream-ivshmem = {
+    enable = true;
+    description = "Scream IVSHMEM";
+    serviceConfig = {
+      ExecStart = "${pkgs.scream}/bin/scream -m /dev/shm/scream -o pulse";
+      Restart = "always";
+    };
+    wantedBy = [ "multi-user.target" ];
+    requires = [ "pulseaudio.service" ];
+  };
+}