Disable kptr_restrict in fox

Reviewed-by: Aleix Boné <abonerib@bsc.es>

m/fox/configuration.nix

@@ -14,7 +14,7 @@
   swapDevices = lib.mkForce [];
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.kernelModules = [ "kvm-amd" ];
+  boot.kernelModules = [ "kvm-amd" "amd_uncore" ];
 
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
   hardware.cpu.intel.updateMicrocode = lib.mkForce false;
@@ -22,6 +22,14 @@
   # Use performance for benchmarks
   powerManagement.cpuFreqGovernor = "performance";
 
+  # Disable NUMA balancing
+  boot.kernel.sysctl."kernel.numa_balancing" = 0;
+
+  # Expose kernel addresses
+  boot.kernel.sysctl."kernel.kptr_restrict" = 0;
+
+  services.openssh.settings.X11Forwarding = true;
+
   networking = {
     timeServers = [ "ntp1.upc.edu" "ntp2.upc.edu" ];
     hostName = "fox";