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  2. {
  3. mountScript ? "/bin/sh -i;",
  4. pkgs ? (import <nixpkgs> {}),
  5. kernelPackages ? pkgs: pkgs.linuxPackagesFor pkgs.linux_latest,
  6. udevPackages ? pkgs: [],
  7. kernelModulePackages ? kp: [],
  8. firmwarePackages ? pkgs: [pkgs.firmwareLinuxNonfree],
  9. tools ? pkgs: [],
  10. modprobeConfig ? "",
  11. qemu ? pkgs: pkgs.kvm,
  12. qemuArgs ? "--enable-kvm -m 2G -bios ${pkgs.OVMF.fd}/FV/OVMF.fd"
  13. }:
  14. rec {
  15. maybeCall = f: arg: if builtins.isFunction f then f arg else f;
  17. kernel = (maybeCall kernelPackages pkgs).kernel;
  18. bzImage = kernel + "/bzImage";
  20. firmwareSet = pkgs.buildEnv {
  21. name = "firmware-set";
  22. paths = maybeCall firmwarePackages pkgs;
  23. pathsToLink = ["/lib/firmware"];
  24. };
  25. _kernelPackages = maybeCall kernelPackages pkgs;
  26. _kernelModulePackages = [_kernelPackages.kernel] ++
  27. maybeCall kernelModulePackages _kernelPackages;
  28. kernelModules = pkgs.aggregateModules _kernelModulePackages;
  30. _udevPackages = maybeCall udevPackages pkgs ++ [
  31. pkgs.eudev pkgs.lvm2 pkgs.libinput
  32. ];
  34. udevRules = pkgs.runCommand "udev-rules" {} ''
  35. mkdir -p "$out"/etc/udev/{rules.d,hwdb.d}
  36. for i in ${toString _udevPackages}; do
  37. test -d "$i"/etc/udev/rules.d/ && ln -sf "$i"/etc/udev/rules.d/* "$out"/etc/udev/rules.d
  38. test -d "$i"/var/lib/udev/rules.d/ && ln -sf "$i"/var/lib/udev/rules.d/* "$out"/etc/udev/rules.d
  39. test -d "$i"/etc/udev/hwdb.d/ && ln -sf "$i"/etc/udev/hwdb.d/* "$out"/etc/udev/hwdb.d
  40. test -d "$i"/var/lib/udev/hwdb.d/ && ln -sf "$i"/var/lib/udev/hwdb.d/* "$out"/etc/udev/hwdb.d
  41. done
  42. ${pkgs.eudev}/bin/udevadm hwdb -u -r "$out"
  43. '';
  45. modprobeConf = pkgs.writeText "modprobe.conf" ''
  46. blacklist evbug
  47. '' + modprobeConfig;
  49. initTools = pkgs.buildEnv {
  50. name = "init-tools";
  51. paths =
  52. (with pkgs; [
  53. busybox utillinux kmod bashInteractive lvm2 cryptsetup coreutils
  54. gnugrep gnused eudev
  55. ])
  56. ++ (maybeCall tools pkgs);
  57. ignoreCollisions = true;
  58. pathsToLink = ["/"];
  59. extraOutputsToInstall = ["bin" "out"];
  60. };
  62. initScript = ''
  63. export PATH="/init-tools/bin"
  65. mkdir -p /new-root /proc /sys /dev /run /tmp /etc
  67. mount proc -t proc /proc
  68. mount sysfs -t sysfs /sys
  69. mount run-tmpfs -t tmpfs /run
  70. mount dev-tmpfs -t devtmpfs /dev
  72. mkdir -p /dev/shm /dev/pts /run/user /run/lock /run/nix
  74. mount shm -t tmpfs /dev/shm
  75. mount /devpts -t devpts /dev/pts
  77. chmod a+rwt /dev/shm
  79. echo -n /init-tools/bin/modprobe > /proc/sys/kernel/modprobe
  80. echo -n /firmware > /sys/module/firmware_class/parameters/path
  82. ln -sfT /proc/mounts /etc/mtab
  83. touch /etc/fstab
  85. echo "Ready to start udev"
  87. udevd &
  88. udevadm trigger --action=add
  89. udevadm settle
  91. vgchange -ay
  93. udevadm trigger --action=add
  94. udevadm settle
  96. ${mountScript}
  98. cd /new-root/
  100. udevadm control -e
  102. lsmod
  104. mkdir -p ./{proc,sys,dev,run}
  105. mount --move /proc ./proc
  106. mount --move /sys ./sys
  107. mount --move /dev ./dev
  108. mount --move /run ./run
  110. echo "Ready for switch_root"
  112. exec switch_root . ./"$targetInit"
  113. '';
  115. init = pkgs.writeScript "init" ("#!/bin/sh\n" + initScript);
  117. initrd = pkgs.makeInitrd {
  118. contents = [
  119. { object = init; symlink = "/init";}
  120. { object = kernelModules + "/lib/modules"; symlink = "/lib/modules"; }
  121. { object = initTools; symlink = "/init-tools"; }
  122. { object = pkgs.busybox; symlink = "/busybox"; }
  123. { object = initTools + "/bin/bash"; symlink = "/bin/sh"; }
  124. { object = initTools + "/bin/env"; symlink = "/usr/bin/env"; }
  125. { object = firmwareSet + "/lib/firmware"; symlink = "/firmware"; }
  126. { object = modprobeConf; symlink = "/etc/modprobe.d/modprobe.conf"; }
  127. { object = udevRules + "/etc/udev"; symlink = "/etc/udev"; }
  128. ];
  129. };
  131. qemuScript = pkgs.writeScript "qemu-script" ''#! /bin/sh
  132. ${maybeCall qemu pkgs}/bin/qemu-system-$(echo "${builtins.currentSystem}" | sed -e "s/-.*//") \
  133. ${qemuArgs} -kernel ${bzImage} -initrd ${initrd}/initrd "$@"
  134. '';
  135. qemuScriptTextMode = pkgs.writeScript "qemu-script" ''#! /bin/sh
  136. ${maybeCall qemu pkgs}/bin/qemu-system-$(echo "${builtins.currentSystem}" | sed -e "s/-.*//") \
  137. ${qemuArgs} -kernel ${bzImage} -initrd ${initrd}/initrd \
  138. -nographic -append "console=ttyS0" "$@"
  139. '';
  140. }
  141.  
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