Re: [Nix-dev] Has someone a working setup for Kernel development with NixOS?

[Matthias Beyer]

Hi,

so here is what I've got so far... maybe my approach is nonsense, but 
I don't know that (yet... feel free to point me to a better one).

It doesn't work, though, as I get:

error: value is a function while a set was expected

and I don't know why.

Here is my custom-kernel.nix. The imports are simply things which 
should be in a normal configuration.nix.

Maybe someone of you has a good idea how to get this working.

-8<-
{ config, pkgs, ... }:

let
  configDir = /home/m/config/nixos;
  nixpkgsClone = /home/m/dev/contrib/nixpkgs;

  kernelSrc = "../linux/";
  kernelVersion = "4.7-custom";

customKernelFn = 
{ stdenv, fetchurl, perl, buildLinux, ... } @ args:
import 
"${nixpkgsClone}/pkgs/os-specific/linux/kernel/generic.nix" (args // {
version = kernelVersion;
extraMeta.branch = "master";

src = kernelSrc;
kernelPatches = pkgs.kernelPatches;

features.iwlwifi = true;
features.efiBootStub = true;
features.needsCifsUtils = true;
features.canDisableNetfilterConntrackHelpers = 
true;
features.netfilterRPFilter = true;
})
;

customKernel = customKernelFn {
stdenv = pkgs.stdenv;
  fetchurl = pkgs.fetchurl;
perl = pkgs.perl;
buildLinux = pkgs.buildLinux;

kernelPatches = with pkgs.kernelPatches;
[ kernelPatches.bridge_stp_helper
kernelPatches.qat_common_Makefile
kernelPatches.hiddev_CVE_2016_5829
]
++ lib.optionals ((platform.kernelArch or null) == 
"mips")
[ kernelPatches.mips_fpureg_emu
kernelPatches.mips_fpu_sigill
kernelPatches.mips_ext3_n32
];

};

customKernelPackages = pkgs.recurseIntoAttrs
(pkgs.linuxPackagesFor customKernel pkgs.linuxPackages_custom);
in

{
  imports = [
# Base configuration
"${configDir}/base-configuration.nix"

# Program configuration
"${configDir}/programs/default.nix"

# Filesystem additions
"${configDir}/fs/yuu.nix"

# Users
"${configDir}/users/m.nix"

# Services
"${configDir}/services/sshServer.nix"
"${configDir}/services/x.nix"
  ];

  boot.kernelPackages = customKernelPackages;
  
  # Define on which hard drive you want to install Grub.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  boot.initrd.availableKernelModules = [ "ehci_pci" "ahci" "usb_storage" ];
  boot.initrd.kernelModules = [ "fbcon" "kvm-intel" ];
  boot.initrd.luks.cryptoModules = [ "aes" "sha256" "sha1" "cbc" ];

  networking = {
hostName = "yuu-kernelvm";
nameservers = [ "8.8.8.8" "8.8.4.4" ];
wireless.enable = false;
useDHCP = false;
  };

  nixpkgs.config.allowUnfree = false;

  environment.variables = {
CONFIG_DIR  = "~/config";
EDITOR  = "nvim";
  };

  environment.systemPackages = let
basePkgs= import "${configDir}/pkgs/basePackages.nix" pkgs;
analyzePkgs = import "${configDir}/pkgs/analyzePackages.nix" pkgs;
devPkgs = import "${configDir}/pkgs/devPackages.nix" pkgs;
docPkgs = import "${configDir}/pkgs/docPackages.nix" pkgs;
networkingPkgs = import "${configDir}/pkgs/networkingPackages.nix" pkgs;
nvimPkgs = import "${configDir}/pkgs/neovim.nix" pkgs;
  in
basePkgs ++
analyzePkgs ++
devPkgs ++
docPkgs ++
networkingPkgs ++
nvimPkgs;

}
->8-


On 27-06-2016 21:50:38, Layus wrote:
> Hi,
> 
> Basically you need to build the vm attribute from
> /nixos/default.nix.
> 
> You can do this with
> nix-build /path/to/nixpkgs/nixos -A vm
> or even with
> nixos-rebuild build-vm
> 
> You also need to specify an alternate nixos config, which you can do using
> 
> NIXOS_CONFIG=/path/to/custom/configuration.nix
> or using nixos-config in nix-path (as below).
> 
> For your setup, the simplest way may be to
> 
> NIXOS_CONFIG=/my/configuration.nix nixos-rebuild build-vm
> 
> Anyway, you will obtain a script to start the vm.
> 
> Now, bear in mind that the vm is started with QEMU & KVM, so you may need to
> tune the options if you want your developpment kernel to be fully used.
> Read the produced script if you want more insight into qemu options.
> If I remember well, in my setup the network stack of the guest was not used,
> the host kernel was used instead, even in the VM.
> I am no expert, so I may be wrong. Just keep it in mind if you experience
> strange results.
> 
> You may also need to avoid full 

Re: [Nix-dev] Has someone a working setup for Kernel development with NixOS?

[joachifm]

On Mon, Jun 27, 2016, at 08:52 PM, Matthias Beyer wrote:
> basically what I do with `nixos-rebuild build-vm` but from another 
> configuration.nix than my system-configuration.nix.

You probably want something like
```
$ nix-build -I nixpkgs=/my/nixpkgs -I nixos-config=/my/configuration.nix
'' -A vm
$ ./result/bin/run-nixos-vm
```
or some variation thereof.

HTH,
Joachim
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Re: [Nix-dev] Has someone a working setup for Kernel development with NixOS?

[Matthias Beyer]

This looks like a starting point,

but what I want to do is to build a full "nixos-rebuild build-vm"-VM 
with it - so I have some X-Server running, some browser installed and 
so on.

basically what I do with `nixos-rebuild build-vm` but from another 
configuration.nix than my system-configuration.nix.

Is there a way to do this?

I already found `pkgs.linuxPackages_custom` which can be used to do 
this, but I don't know how I can call the .nix file now to build a 
qemu VM with it...

Maybe some pointers?

On 27-06-2016 18:45:42, Domen Kožar wrote:
> Forgot to answer, thanks for the ping:
> https://github.com/NixOS/nixpkgs/issues/14721
> 
> On Mon, Jun 27, 2016, 20:30 Matthias Beyer  wrote:
> 
> > Hi there,
> >
> > so I'm sending a PING on this because nobody responded. This will be
> > my only PING (as I'm really interested in doing this) and I will not
> > send any further PINGs on this, as it might be too much noise for some
> > people in here.
> >
> > On 18-06-2016 20:16:48, Matthias Beyer wrote:
> > > Hi,
> > >
> > > I want to get my feet wet with kernel development after my bachelors
> > > thesis and maybe someone has a working setup for kernel dev with
> > > NixOS.
> > >
> > > I especially think about doing a `nixos-rebuild build-vm` with a
> > > self-compiled kernel, so what I'm looking for is something like this:
> > >
> > > A way to build a QEMU VM with all my stuff installed (what
> > > `nixos-rebuild build-vm` does) _without_ changing my
> > > configuration.nix
> > >
> > > Does someone of you people on this list have a setup for this? Does
> > > someone have a suggestion how to do this?
> > >
> > > I'm also thinking about using build machines for this and so on ...
> > >
> > > --- snip ---
> > >
> > > Of course you can do all these things without nixos, but I kinda like
> > > the idea of doing it with nixos tools so I can have my system
> > > services, programs and so on be tested in the VM without having to do
> > > much setup on my own.
> >
> > --
> > Mit freundlichen Grüßen,
> > Kind regards,
> > Matthias Beyer
> >
> > Proudly sent with mutt.
> > Happily signed with gnupg.
> > ___
> > nix-dev mailing list
> > nix-dev@lists.science.uu.nl
> > http://lists.science.uu.nl/mailman/listinfo/nix-dev
> >

-- 
Mit freundlichen Grüßen,
Kind regards,
Matthias Beyer

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Re: [Nix-dev] Has someone a working setup for Kernel development with NixOS?

[Domen Kožar]

Forgot to answer, thanks for the ping:
https://github.com/NixOS/nixpkgs/issues/14721

On Mon, Jun 27, 2016, 20:30 Matthias Beyer  wrote:

> Hi there,
>
> so I'm sending a PING on this because nobody responded. This will be
> my only PING (as I'm really interested in doing this) and I will not
> send any further PINGs on this, as it might be too much noise for some
> people in here.
>
> On 18-06-2016 20:16:48, Matthias Beyer wrote:
> > Hi,
> >
> > I want to get my feet wet with kernel development after my bachelors
> > thesis and maybe someone has a working setup for kernel dev with
> > NixOS.
> >
> > I especially think about doing a `nixos-rebuild build-vm` with a
> > self-compiled kernel, so what I'm looking for is something like this:
> >
> > A way to build a QEMU VM with all my stuff installed (what
> > `nixos-rebuild build-vm` does) _without_ changing my
> > configuration.nix
> >
> > Does someone of you people on this list have a setup for this? Does
> > someone have a suggestion how to do this?
> >
> > I'm also thinking about using build machines for this and so on ...
> >
> > --- snip ---
> >
> > Of course you can do all these things without nixos, but I kinda like
> > the idea of doing it with nixos tools so I can have my system
> > services, programs and so on be tested in the VM without having to do
> > much setup on my own.
>
> --
> Mit freundlichen Grüßen,
> Kind regards,
> Matthias Beyer
>
> Proudly sent with mutt.
> Happily signed with gnupg.
> ___
> nix-dev mailing list
> nix-dev@lists.science.uu.nl
> http://lists.science.uu.nl/mailman/listinfo/nix-dev
>
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Re: [Nix-dev] Has someone a working setup for Kernel development with NixOS?

[Matthias Beyer]

Hi there,

so I'm sending a PING on this because nobody responded. This will be 
my only PING (as I'm really interested in doing this) and I will not 
send any further PINGs on this, as it might be too much noise for some 
people in here.

On 18-06-2016 20:16:48, Matthias Beyer wrote:
> Hi,
> 
> I want to get my feet wet with kernel development after my bachelors 
> thesis and maybe someone has a working setup for kernel dev with 
> NixOS.
> 
> I especially think about doing a `nixos-rebuild build-vm` with a 
> self-compiled kernel, so what I'm looking for is something like this:
> 
> A way to build a QEMU VM with all my stuff installed (what 
> `nixos-rebuild build-vm` does) _without_ changing my 
> configuration.nix
> 
> Does someone of you people on this list have a setup for this? Does 
> someone have a suggestion how to do this?
> 
> I'm also thinking about using build machines for this and so on ...
> 
> --- snip ---
> 
> Of course you can do all these things without nixos, but I kinda like 
> the idea of doing it with nixos tools so I can have my system 
> services, programs and so on be tested in the VM without having to do 
> much setup on my own.

-- 
Mit freundlichen Grüßen,
Kind regards,
Matthias Beyer

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[Nix-dev] Has someone a working setup for Kernel development with NixOS?

[Matthias Beyer]

Hi,

I want to get my feet wet with kernel development after my bachelors 
thesis and maybe someone has a working setup for kernel dev with 
NixOS.

I especially think about doing a `nixos-rebuild build-vm` with a 
self-compiled kernel, so what I'm looking for is something like this:

A way to build a QEMU VM with all my stuff installed (what 
`nixos-rebuild build-vm` does) _without_ changing my 
configuration.nix

Does someone of you people on this list have a setup for this? Does 
someone have a suggestion how to do this?

I'm also thinking about using build machines for this and so on ...

--- snip ---

Of course you can do all these things without nixos, but I kinda like 
the idea of doing it with nixos tools so I can have my system 
services, programs and so on be tested in the VM without having to do 
much setup on my own.

-- 
Mit freundlichen Grüßen,
Kind regards,
Matthias Beyer

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