Arch Linux User Repository

Adding

scripts/config --disable CONFIG_IMA_ARCH_POLICY

to myconfig does solve the "Failed to insert module 'nvidia': Key was rejected by service" problem.

Anyone who configured secure boot using sbctl and want to load dkms modules can try this solution.

This package have several variables to enable/disable features.

##
## The following variables can be customized at build time. Use env or export to change at your wish
##
##   Example: env _microarchitecture=98 use_numa=n use_tracers=n makepkg -sc
##
## Look inside 'choose-gcc-optimization.sh' to choose your microarchitecture
## Valid numbers between: 0 to 99
## Default is: 0 => generic
## Good option if your package is for one machine: 98 (Intel native) or 99 (AMD native)
if [ -z ${_microarchitecture+x} ]; then
  _microarchitecture=0
fi

## Disable NUMA since most users do not have multiple processors. Breaks CUDA/NvEnc.
## Archlinux and Xanmod enable it by default.
## Set variable "use_numa" to: n to disable (possibly increase performance)
##                             y to enable  (stock default)
if [ -z ${use_numa+x} ]; then
  use_numa=y
fi

## Since upstream disabled CONFIG_STACK_TRACER (limits debugging and analyzing of the kernel)
## you can enable them setting this option. Caution, because they have an impact in performance.
## Stock Archlinux has this enabled. 
## Set variable "use_tracers" to: n to disable (possibly increase performance, XanMod default)
##                                y to enable  (Archlinux default)
if [ -z ${use_tracers+x} ]; then
  use_tracers=n
fi

# Unique compiler supported upstream is GCC
## Choose between GCC and CLANG config (default is GCC)
## Use the environment variable "_compiler=clang"
if [ "${_compiler}" = "clang" ]; then
  _compiler_flags="CC=clang HOSTCC=clang LLVM=1 LLVM_IAS=1"
fi

# Choose between the 4 main configs for stable branch. Default x86-64-v1 which use CONFIG_GENERIC_CPU2:
# Possible values: config_x86-64-v1 (default) / config_x86-64-v2 / config_x86-64-v3 / config_x86-64-v4
# This will be overwritten by selecting any option in microarchitecture script
# Source files: https://github.com/xanmod/linux/tree/5.17/CONFIGS/xanmod/gcc
if [ -z ${_config+x} ]; then
  _config=config_x86-64-v1
fi

# Compress modules with ZSTD (to save disk space)
if [ -z ${_compress_modules+x} ]; then
  _compress_modules=n
fi

# Compile ONLY used modules to VASTLY reduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
if [ -z ${_localmodcfg} ]; then
  _localmodcfg=n
fi

# Tweak kernel options prior to a build via nconfig
if [ -z ${_makenconfig} ]; then
  _makenconfig=n
fi

Personally I'm running now xanmod kernel compiled with this:

env _microarchitecture=98 use_tracers=n use_numa=n _localmodcfg=y _compress_modules=y makepkg -sic

Also, you can now create the file myconfig in your local repo to build this package with a custom config or use ${XDG_CONFIG_HOME}/linux-xanmod/myconfig. This file can be a full kernel config or be a script with several entries to add/remove options (you have several examples in PKGBUILD by using scripts/config):

Code involved:

  for _myconfig in "${SRCDEST}/myconfig" "${HOME}/.config/linux-xanmod/myconfig" "${XDG_CONFIG_HOME}/linux-xanmod/myconfig" ; do
    if [ -f "${_myconfig}" ] && [ "$(wc -l <"${_myconfig}")" -gt "0" ]; then
      if grep -q 'scripts/config' "${_myconfig}"; then
        # myconfig is a partial file. Executing as a script
        msg2 "Applying myconfig..."
        bash -x "${_myconfig}"
      else
        # myconfig is a full config file. Replacing default .config
        msg2 "Using user CUSTOM config..."
        cp -f "${_myconfig}" .config
      fi
      echo
      break
    fi
  done

Hey guys, is this meant to be built skipping pgp verification? As i'm currently getting an error with that

I configured secure boot using sbctl. When using linux-xanmod, it can boot up normally but nvidia related modules don't load:

systemd-modules-load[143]: Failed to insert module 'nvidia': Key was rejected by service
systemd-modules-load[143]: Failed to insert module 'nvidia_modeset': Key was rejected by service
systemd-modules-load[143]: Failed to insert module 'nvidia_uvm': Key was rejected by service
systemd-modules-load[143]: Failed to insert module 'nvidia_drm': Key was rejected by service

As far as I know dkms automatically generates /var/lib/dkms/mok.key to signs modules, what if I tell dkms to sign nvidia modules using the key that was used to sign the built-in modules when compiling linux-xanmod? It probably doesn't help, in the same case extra/linux-zen is able to load nvidia, and I'm wondering what options the xanmod patch changed to cause this problem.

EDIT: Maybe CONFIG_IMA_ARCH_POLICY=y. The solution seems to be to use the kernel's built-in signatures as I mentioned, or to use slim? or to recompile to remove this option.

@Riedler yeah, I personally use only a reduced myconfig, so I didn't have to maintain a full config:

cat .config/linux-xanmod/myconfig      
scripts/config --enable CONFIG_IWLWIFI_DEBUG
scripts/config --module CONFIG_MMC_BLOCK
scripts/config --set-val MMC_BLOCK_MINORS 8
scripts/config --module CONFIG_SND_DMAENGINE_PCM
scripts/config --module CONFIG_SND_COMPRESS_OFFLOAD
scripts/config --module CONFIG_AC97_BUS
scripts/config --enable CONFIG_INPUT_TABLET
scripts/config --enable CONFIG_TRACING
scripts/config --enable CONFIG_KPROBE_EVENTS
scripts/config --enable CONFIG_BPF_EVENTS

@figue nothing too crazy I think. Not even sure if any of this goes through to linux-xanmod.

/etc/makepkg → https://pastebin.com/S5GJqpqZ

as for myconfig - yeah somewhat, see here: https://github.com/RiedleroD/dotfiles/blob/master/linux-xanmod.conf

I should probably stop using the myconfig, I don't have time to maintain the custom one anymore…

@Riedler are you using any custom flag?

I'm sorry I don't have time to debug this rn 😢 I just wanted to mention the error in case it's an obvious problem somewhere…

@Riedler Have you tried building in a clean chroot?

Seems to have built okay here: linux-xanmod.log

since after 6.7.7 I haven't been able to compile this package. It says: libbpf: failed to find '.BTF' ELF section in /tmp/makepkg/linux-xanmod/src/linux-6.7/vmlinux when I try to compile 6.7.12…