nixos-config/machines/hyper/hardware-configuration.nix

# SPDX-FileCopyrightText: 2020-2024 Simon Bruder <simon@sbruder.de>
#
# SPDX-License-Identifier: AGPL-3.0-or-later

{ config, lib, modulesPath, pkgs, ... }:

{
  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
  ];

  boot = {
    # fan control configuration from https://gist.github.com/bakman2/e801f342aaa7cade62d7bd54fd3eabd8
    kernelModules = [ "kvm-amd" "it87" ];
    kernelParams = [
      "acpi_enforce_resources=lax" # allow it87 to load
      "ip=dhcp"
      "iommu=pt"
      "default_hugepagesz=1G"
      "hugepagesz=1G"
      "hugepages=90"
    ];
    extraModulePackages = with config.boot.kernelPackages; [ it87 ];
    extraModprobeConfig = ''
      options it87 force_id=0x8688
      options vfio-pci ids=8086:56a0,8086:4f90
      softdep drm pre: vfio-pci
      options kvm-amd nested=0 avic=1 npt=1
    '';
    loader = {
      grub.enable = false;
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    initrd = {
      availableKernelModules = [ "aesni_intel" "ahci" "ehci_pci" "nvme" "r8169" "sd_mod" "sr_mod" "usb_storage" "usbhid" "xhci_pci" ];
      kernelModules = [ "dm-snapshot" ];
      luks.devices = {
        root = {
          name = "root";
          device = "/dev/disk/by-uuid/63d366bd-5453-46b5-89d5-a61cbb828102";
          preLVM = true;
          allowDiscards = true;
        };
      };
    };
  };

  # https://www.reddit.com/r/gigabyte/comments/p5ewjn/b550i_pro_ax_f13_bios_sleep_issue_on_linux/
  systemd.services.suspend-fix = {
    wantedBy = [ "multi-user.target" ];
    description = "Fix suspend";

    script = ''
      if grep -q "GPP0	.*	\*enabled" /proc/acpi/wakeup; then
          echo GPP0 > /proc/acpi/wakeup
          echo "Disabled wakeup for GPP0"
      else
          echo "Wakeup for GPP0 already disabled"
      fi
    '';

    serviceConfig = {
      Type = "oneshot";
    };
  };


  fileSystems = {
    "/" = {
      device = "/dev/disk/by-uuid/53f4e762-39fa-41a6-8b78-4999d38e6e88";
      fsType = "btrfs";
      options = [ "discard=async" "noatime" "compress=zstd" ];
    };

    "/boot" = {
      device = "/dev/disk/by-uuid/403C-02C1";
      fsType = "vfat";
    };
  };
}