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

It builds 5.12.11 for CONFIG_GENERIC_CPU. If I force it to build for microarchitecture 98, then the build fails when trying to build KVM libraries.

I've pushed some more fixes for clang build. Now it enables thin lto by default. I think default package with gcc is ok, and clang too, but if I made some mistake, please, report here. Thanks!

Starting from 5.12.10, upstream moved config files to a folder, and it provides a config for gcc or clang. So I added a new variable :)

So you can set $_compiler to "gcc" or "clang" (default is gcc).

@figue you were right, thanks!

Thanks @arglebargle. Looks good. Will add it in the next release.

Here's a small patch to support the new GCC 11 x86_64 microarchitecture feature level targets. Support for these choices is already upstream in the GCC patch Xanmod is applying, this just lets you pick them with the included gcc script.

92, 93, 94 select x86-64-v2, -v3 and -v4 respectively, you need GCC >= 11 for these to do anything useful. Feel free to modify however you like if 92, 93 and 94 aren't what you'd choose for this.

commit 4a477efde9fa24138733bc6b3eca7bd468e5528b
Author: Scott B <28817345+foundObjects@users.noreply.github.com>
Date:   Mon May 17 10:02:32 2021 -0700

    add new GCC-11 feature targets; require GCC>=11

diff --git a/choose-gcc-optimization.sh b/choose-gcc-optimization.sh
index e45a210..f10eec5 100755
--- a/choose-gcc-optimization.sh
+++ b/choose-gcc-optimization.sh
@@ -59,6 +59,10 @@ cat << EOF
    46) Intel Rocket Lake
    47) Intel Alder Lake

+   92) Generic-x86-64-v2 (Nehalem and newer)
+   93) Generic-x86-64-v3 (Haswell and newer)
+   94) Generic-x86-64-v4 (AVX512 CPUs)
+
    98) Intel-Native optimizations autodetected by GCC
    99) AMD-Native optimizations autodetected by GCC

@@ -117,6 +121,9 @@ case $answer in
    45) Microarchitecture=CONFIG_MSAPPHIRERAPIDS ;;
    46) Microarchitecture=CONFIG_MROCKETLAKE ;;
    47) Microarchitecture=CONFIG_MALDERLAKE ;;
+   92) Microarchitecture=CONFIG_GENERIC_CPU2 ;;
+   93) Microarchitecture=CONFIG_GENERIC_CPU3 ;;
+   94) Microarchitecture=CONFIG_GENERIC_CPU4 ;;
    98) Microarchitecture=CONFIG_MNATIVE_INTEL ;;
    99) Microarchitecture=CONFIG_MNATIVE_AMD ;;
     *) default=CONFIG_GENERIC_CPU ;;

@redsolja please clean your src (makepkg -C), patches are ok.

Cannot build.

patching file virt/kvm/kvm_main.c
==> ERROR: A failure occurred in prepare().
    Aborting...

@tam1m done! Thanks.

I'd also vote for a non-colliding _microarchitecture value.