# Copyright 2020-2024 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 EAPI=8 KERNEL_IUSE_GENERIC_UKI=1 KERNEL_IUSE_MODULES_SIGN=1 inherit kernel-build toolchain-funcs MY_P=linux-${PV%.*} # https://dev.gentoo.org/~mpagano/genpatches/kernels.html GENPATCHES_P=genpatches-${PV%.*}-$(( ${PV##*.} + 2 )) # https://github.com/projg2/gentoo-kernel-config GENTOO_CONFIG_VER=g14 # https://github.com/CachyOS/linux-cachyos CONFIG_COMMIT="f843b48b52fb52c00f76b7d29f70ba1eb2b4cc06" CONFIG_PV="${PV}-${CONFIG_COMMIT::8}" CONFIG_P="${PN}-${CONFIG_PV}" # https://github.com/CachyOS/kernel-patches PATCH_COMMIT="b7980f97f1b88029af0cee9e3ab17c76857e335d" PATCH_PV="${PV}-${PATCH_COMMIT::8}" PATCH_P="${PN}-${PATCH_PV}" # supported linux-cachyos flavours from CachyOS/linux-cachyos (excl. lts/rc) FLAVOURS="cachyos bmq bore deckify eevdf hardened rt-bore sched-ext server" # array of patches in format # : # special use - always applies patch # applied in this order CACHY_PATCH_SPECS=( # global -:all/0001-cachyos-base-all.patch deckify:misc/0001-acpi-call.patch deckify:misc/0001-handheld.patch deckify:misc/0001-wifi-ath11k-Rename-QCA2066-fw-dir-to-QCA206X.patch # _cpusched cachyos:sched/0001-sched-ext.patch cachyos:sched/0001-bore-cachy-ext.patch bore:sched/0001-bore-cachy.patch bmq:sched/0001-prjc-cachy.patch eevdf:sched/0001-eevdf-next.patch server:sched/0001-eevdf-next.patch # server selects eevdf rt-bore:misc/0001-rt.patch rt-bore:sched/0001-bore-cachy-rt.patch #hardened:sched/0001-bore-cachy.patch #hardened:misc/0001-hardened.patch sched-ext:sched/0001-sched-ext.patch ) # build use dependent CACHY_PATCH_URIS # repo archive includes a bunch of old stuff we don't need gen_cachy_patch_uris() { local base spec cond patch file base="https://raw.githubusercontent.com/CachyOS/kernel-patches" base+="/${PATCH_COMMIT}/$(ver_cut 1-2)" for spec in "${CACHY_PATCH_SPECS[@]}"; do IFS=":" read -r cond patch <<<"${spec}" file="${PATCH_P}-${patch##*/}" if [[ "${cond}" == "-" ]]; then CACHY_PATCH_URIS+="${base}/${patch} -> ${file} " else CACHY_PATCH_URIS+="${cond}? ( ${base}/${patch} -> ${file} ) " fi done export CACHY_PATCH_URIS } gen_cachy_patch_uris DESCRIPTION="Linux kernel built with CachyOS and Gentoo patches" HOMEPAGE=" https://cachyos.org/ https://github.com/CachyOS/linux-cachyos/ https://www.kernel.org/ " SRC_URI+=" https://cdn.kernel.org/pub/linux/kernel/v$(ver_cut 1).x/${MY_P}.tar.xz https://dev.gentoo.org/~mpagano/dist/genpatches/${GENPATCHES_P}.base.tar.xz https://dev.gentoo.org/~mpagano/dist/genpatches/${GENPATCHES_P}.extras.tar.xz https://dev.gentoo.org/~alicef/dist/genpatches/${GENPATCHES_P}.base.tar.xz https://dev.gentoo.org/~alicef/dist/genpatches/${GENPATCHES_P}.extras.tar.xz https://github.com/projg2/gentoo-kernel-config/archive/${GENTOO_CONFIG_VER}.tar.gz -> gentoo-kernel-config-${GENTOO_CONFIG_VER}.tar.gz https://raw.githubusercontent.com/CachyOS/linux-cachyos/${CONFIG_COMMIT}/linux-cachyos/config -> ${CONFIG_P}-kernel.config ${CACHY_PATCH_URIS} " S=${WORKDIR}/${MY_P} KEYWORDS="~amd64" IUSE="clang debug lto ${FLAVOURS/cachyos/+cachyos}" REQUIRED_USE=" ^^ ( ${FLAVOURS} ) lto? ( clang ) " BDEPEND=" clang? ( sys-devel/clang sys-devel/lld sys-devel/llvm ) debug? ( dev-util/pahole ) " PDEPEND=" >=virtual/dist-kernel-${PV} " QA_FLAGS_IGNORED=" usr/src/linux-.*/scripts/gcc-plugins/.*.so usr/src/linux-.*/vmlinux usr/src/linux-.*/arch/powerpc/kernel/vdso.*/vdso.*.so.dbg " # get the "cachy name" of the kernel # as in CachyOS/linux-cachyos repo cachy_get_version() { local flavour for flavour in ${FLAVOURS}; do if use "${flavour}"; then if [[ "${flavour}" == "cachyos" ]]; then echo "linux-cachyos" || die else echo "linux-cachyos-${flavour}" || die fi return fi done } # get the patches based on flavour choice cachy_get_patches() { local spec cond patch patches for spec in "${CACHY_PATCH_SPECS[@]}"; do IFS=":" read -r cond patch <<<"${spec}" || die if [[ "${cond}" == "-" ]] || use "${cond}"; then patches+="${DISTDIR}/${PATCH_P}-${patch##*/} " fi done echo ${patches} || die } # echo formatted kernel config line # $1 can be one of set, unset, mod or val # $2 config name as in CONFIG_ # $3 if $1 is val set val as a config string kconf() { if [[ $# -lt 2 ]]; then die "kconf needs at least 2 args" fi case "$1" in set) echo "CONFIG_$2=y" ;; unset) echo "# CONFIG_$2 is not set" ;; mod) echo "CONFIG_$2=m" ;; val) if [[ -z "${3}" ]]; then die "kconf val requires a value" fi echo "CONFIG_$2=$3" ;; *) die "invalid option $1 for kconf" ;; esac } # config defaults from Arch PKGBUILD cachy_get_config() { # first setup the _* vars (only those that differ) local _cachy_config _cpusched _HZ_ticks _tickrate _preempt _hugepage _use_llvm_lto if use cachyos; then _cachy_config=y _cpusched=cachyos _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use bmq; then _cachy_config=y _cpusched=bmq _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use bore; then _cachy_config=y _cpusched=bore _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use deckify; then _cachy_config=y _cpusched=cachyos _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use eevdf; then _cachy_config=y _cpusched=eevdf _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use hardened; then _cachy_config=y _cpusched=hardened _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=madvise elif use rt-bore; then _cachy_config=y _cpusched=rt-bore _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use sched-ext; then _cachy_config=y _cpusched=sched-ext _HZ_ticks=1000 _tickrate=full _preempt=full _hugepage=always elif use server; then _cachy_config= _cpusched=eevdf _HZ_ticks=300 _tickrate=idle _preempt=server _hugepage=always fi if use lto; then _use_llvm_lto=thin else _use_llvm_lto=none fi # _cachy_config if [[ -n "${_cachy_config}" ]]; then kconf set CACHY fi # _cpusched case "${_cpusched}" in cachyos) kconf set SCHED_CLASS_EXT kconf set SCHED_BORE ;; bore|hardened) kconf set SCHED_BORE ;; bmq) kconf set SCHED_ALT kconf set SCHED_BMQ ;; eevdf) ;; rt-bore) kconf set SCHED_BORE kconf set PREEMPT_COUNT kconf set PREEMPTION kconf unset PREEMPT_VOLUNTARY kconf unset PREEMPT kconf unset PREEMPT_NONE kconf unset PREEMPT_RT kconf unset PREEMPT_DYNAMIC kconf set PREEMPT_BUILD kconf set PREEMPT_BUILD_AUTO kconf set PREEMPT_AUTO ;; sched-ext) kconf set SCHED_CLASS_EXT ;; *) die "Invalid _cpusched value: ${_cpusched}" ;; esac # _HZ_ticks case "${_HZ_ticks}" in 100|250|500|600|625|750|1000) kconf unset HZ_300 kconf set "HZ_${_HZ_ticks}" kconf val HZ "${_HZ_ticks}" ;; 300) kconf set HZ_300 kconf val HZ 300 ;; *) die "Invalid _HZ_ticks value: ${_HZ_ticks}" ;; esac # _nr_cpus kconf val NR_CPUS 320 # _tickrate case "${_tickrate}" in idle) kconf unset HZ_PERIODIC kconf unset NO_HZ_FULL kconf set NO_HZ_IDLE kconf set NO_HZ kconf set NO_HZ_COMMON ;; full) kconf unset HZ_PERIODIC kconf unset NO_HZ_IDLE kconf unset CONTEXT_TRACKING_FORCE kconf set NO_HZ_FULL_NODEF kconf set NO_HZ_FULL kconf set NO_HZ kconf set NO_HZ_COMMON kconf set CONTEXT_TRACKING ;; *) die "Invalid _tickrate value: ${_tickrate}" ;; esac # _preempt if [[ "${_cpusched}" != rt* ]]; then case "${_preempt}" in full) kconf set PREEMPT_BUILD kconf unset PREEMPT_NONE kconf unset PREEMPT_VOLUNTARY kconf set PREEMPT kconf set PREEMPT_COUNT kconf set PREEMPTION kconf set PREEMPT_DYNAMIC ;; server) kconf set PREEMPT_NONE_BUILD kconf set PREEMPT_NONE kconf unset PREEMPT_VOLUNTARY kconf unset PREEMPT kconf unset PREEMPTION kconf unset PREEMPT_DYNAMIC ;; *) die "Invalid _preempt value: ${_preempt}" ;; esac fi # _cc_harder kconf unset CC_OPTIMIZE_FOR_PERFORMANCE kconf set CC_OPTIMIZE_FOR_PERFORMANCE_O3 # _tcp_bbr3 kconf mod TCP_CONG_CUBIC kconf unset DEFAULT_CUBIC kconf set TCP_CONG_BBR kconf val DEFAULT_TCP_CONG "\"bbr\"" # _hugepage case "${_hugepage}" in always) kconf unset TRANSPARENT_HUGEPAGE_MADVISE kconf set TRANSPARENT_HUGEPAGE_ALWAYS ;; madvise) kconf unset TRANSPARENT_HUGEPAGE_ALWAYS kconf set TRANSPARENT_HUGEPAGE_MADVISE ;; *) die "Invalid _hugepage value: ${_hugepage}" ;; esac # _user_ns kconf set USER_NS # _use_llvm_lto case "${_use_llvm_lto}" in thin) kconf set LTO kconf set LTO_CLANG kconf set ARCH_SUPPORTS_LTO_CLANG kconf set ARCH_SUPPORTS_LTO_CLANG_THIN kconf unset LTO_NONE kconf set HAS_LTO_CLANG kconf unset LTO_CLANG_FULL kconf set LTO_CLANG_THIN kconf set HAVE_GCC_PLUGINS ;; none) kconf set LTO_NONE ;; *) die "Invalid _use_llvm_lto value: ${_use_llvm_lto}" ;; esac } pkg_setup() { if use clang; then OLD_AR="${AR}"; AR="llvm-ar" OLD_AS="${AS}"; AS="llvm-as" OLD_CC="${CC}"; CC="clang" OLD_LD="${LD}"; LD="ld.lld" OLD_NM="${NM}"; NM="llvm-nm" OLD_OBJCOPY="${OBJCOPY}"; OBJCOPY="llvm-objcopy" OLD_OBJDUMP="${OBJDUMP}"; OBJDUMP="llvm-objcopy" OLD_READELF="${READELF}"; READELF="llvm-readelf" OLD_STRIP="${STRIP}"; STRIP="llvm-strip" tc-export AS CC LD AR NM STRIP OBJCOPY OBJDUMP READELF export LLVM="1" export LLVM_IAS="1" einfo "Forcing LLVM toolchain due to USE=clang:" einfo "AR: ${OLD_AR} -> ${AR}" einfo "AS: ${OLD_AS} -> ${AS}" einfo "CC: ${OLD_CC} -> ${CC}" einfo "LD: ${OLD_LD} -> ${LD}" einfo "NM: ${OLD_NM} -> ${NM}" einfo "OBJCOPY: ${OLD_OBJCOPY} -> ${OBJCOPY}" einfo "OBJDUMP: ${OLD_OBJDUMP} -> ${OBJDUMP}" einfo "READELF: ${OLD_READELF} -> ${READELF}" einfo "STRIP: ${OLD_STRIP} -> ${STRIP}" einfo "Setting LLVM=1 LLVM_IAS=1" fi } src_prepare() { # in cachyos patches rm "${WORKDIR}/2005_netfilter-xtables-fix-typo.patch" || die local PATCHES=( # meh, genpatches have no directory "${WORKDIR}"/*.patch # CachyOS Patches $(cachy_get_patches) ) default # Localversion kconf val LOCALVERSION "\"-$(cachy_get_version)\"" > "${T}"/version.config || die # CachyOS config as base cp "${DISTDIR}/${CONFIG_P}-kernel.config" .config || die # Package defaults cachy_get_config > "${T}"/cachy-defaults.config || die # Gentoo defaults local dist_conf_path="${WORKDIR}/gentoo-kernel-config-${GENTOO_CONFIG_VER}" local merge_configs=( "${T}"/version.config "${dist_conf_path}"/base.config "${T}"/cachy-defaults.config ) use debug || merge_configs+=( "${dist_conf_path}"/no-debug.config ) use secureboot && merge_configs+=( "${dist_conf_path}/secureboot.config" ) kernel-build_merge_configs "${merge_configs[@]}" }