nixos-config/configurations/host/materusPC/hardware/boot.nix

{ config, pkgs, lib, materusArg, ... }:
let
  video = [

    "video=HDMI-A-3:1920x1080@144"
    "video=DP-3:1920x1080@240"


    #"video=DP-1:1920x1080@240"
    #"video=DP-2:1920x1080@240"
    #"video=HDMI-A-1:1920x1080@240"
    #"video=HDMI-A-2:1920x1080@240"


  ];

in
{
  #Kernel

  boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux_zen;

  boot.kernelParams = [
    "rcu_nocbs=${materusArg.materusPC.vmCores}"
    "nohz_full=${materusArg.materusPC.vmCores}"
    "vfio_iommu_type1.allow_unsafe_interrupts=1"
    "pcie_acs_override=downstream,multifunction" /*"pci-stub.ids=1002:744c"*/
    "nox2apic"
    "nvme_core.default_ps_max_latency_us=0"
    "nvme_core.io_timeout=255"
    "nvme_core.max_retries=10"
    "nvme_core.shutdown_timeout=10"
    "amd_iommu=on"
    "amdgpu.ppfeaturemask=0xffffffff"
    "iommu=pt"
    "psi=1"
  ] ++ video;
  boot.kernelModules = [ "pci-stub" "amdgpu" "i2c_dev" "kvm_amd" "vfio" "vfio_iommu_type1" "vfio-pci" ];
  boot.extraModprobeConfig = ''
    options kvm_amd nested=1 avic=1 npt=1 sev=0
    options vfio_iommu_type1 allow_unsafe_interrupts=1
  '';
  boot.kernel.sysctl = {
    "vm.max_map_count" = 1000000;
    "vm.swappiness" = 10;
    "net.ipv4.ip_forward"=1;
  };


  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];
  boot.initrd.kernelModules = [ "amdgpu" ];

  boot.extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];


  boot.supportedFilesystems = [ "ntfs" "btrfs" "vfat" "exfat" "ext4" ];

  boot.tmp.useTmpfs = true;


  #bootloader
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.efi.efiSysMountPoint = "/boot/efi";
  boot.loader.grub = {
    enable = true;
    efiSupport = true;
    device = "nodev";
    gfxmodeEfi = pkgs.lib.mkDefault "1920x1080@240";
    gfxmodeBios = pkgs.lib.mkDefault "1920x1080@240";
    useOSProber = true;
    memtest86.enable = true;
  };

  boot.plymouth.enable = true;

  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
}