# Compiling Time: 46.76 SBU
# Maintainer: James Buren <ryuo@frugalware.org>
# Contributor: Miklos Vajna <vmiklos@frugalware.org>

### NOTE: check btrfs-progs to match the kernel

## set to y to generate configs
## the build will die after patching
USE_MAKE_CONFIG=${USE_MAKE_CONFIG:-"n"}

Finclude kernel

## ZFS sh**
##  *** This kernel has unused symbols trimming enabled, please disable.
##  *** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.

## check in >=4.16.x , is being working on
## DO NOT enable CONFIG_SP5100_TCO until
## https://bugzilla.kernel.org/show_bug.cgi?id=114201 is *really* resolved
## it kills lots AMD based systems off

## DO NOT enable any CONFIG_GOLDFISH , CONFIG_*_GOLDFISH the driver is broken
## once a decision is made upstream we may re-enbale but for now just don't

## check in >=4.15.x - some fixes in tip/*
## DO NOT enable any X86_5LEVEL CONFIG .. this is a feature Intel CPUs
## will have sometime BUT if you enable such a kernel won't boot on any other BOX!

## DO NOT enable CONFIG_MQ_IOSCHED_KYBER , on my EPYC box it corrupts
## any FS in about seconds on NVMe's , need to investigate -- crazy --


## ENABLE in 14.15 ..

## BPF speculation prevention ( spectre v2 part ) -> CONFIG_BPF_JIT_ALWAYS_ON

url="https://www.kernel.org"
depends=('kmod' 'sed')
makedepends+=('bison' 'rsync')
[[ -z "$_F_kernel_name" ]] && makedepends+=('unifdef')
groups=('base')
archs=('x86_64')
## Do NOT remove noccache here
options+=('nodocs' 'genscriptlet' 'noccache')
_F_archive_grepv="rc"
up2date="Flasttar $url"

_F_kernel_patches=(
			## disable verbose output in normal mode
			ath10k-be-quiet.patch
			## this one is just for NCQ stuff for now
			ata-fix-NCQ-LOG-strings-and-move-to-debug.patch
			## wrong used there
			radeon_dp_aux_transfer_native-no-ratelimited_debug.patch
			## WELL! while technically is an BUG the KERN_ERR is nonsense here while
			##  all it does is to break silent boot. If is an bug will break the kernel
			##  it will break anyway , no matter the error level.
			acpi-use-kern_warning_even_when_error.patch
			## mute crap from ath* driver
			## Please do not remove , not upstream yet
			Unknow-SSD-HFM128GDHTNG-8310B-QUIRK_NO_APST.patch
			## Broken SUBNQN on Viper VPN100
			nvme-Patriot_Viper_VPN100-QUIRK_IGNORE_DEV_SUBNQN.patch
			## No that is just insanity.. turn that warn into debug
			## 'XXX filesystem being mounted at XXXX supports timestamps until 2038'
			## is just 2020 so flooding for 18 years with this on each mount AND/OR remount?. C'mon!
			do_not_bug_the_next_18-years.patch
			## -> dmesg | grep -E 'Applying debug destination|FW already configured'
			iwlwifi-use-debug-for-debug-infos.patch
			## somewhat broken
			fix-bootconfig-makefile.patch
			bootconfig-fallthrough.patch
			## While meant to me informative for admins that code floods
			## with lots false positive even. IOW, is more confusing than informative.
			## Not so funny on large boxes. Turn the pr_warn() into pr_debug()
			apic_vector-spam-in-debug-mode-only.patch
			## Fix iwlwifi bad reporting of Intel/Killer chips
			iwlwifi-fix-5e003982b07ae.patch
			## fix HDMI sound bc of somewhat wrong BIOS
			## See: https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T-series-Laptops/T14s-AMD-no-HDMI-audio-on-Linux/m-p/5081195?page=1
			#rn-pci-acp3x.c_blacklist_dmic_for_P14s_T14s_Campus.patch
			## revert forced default schedutil governor if Intel Pstae driver is enabled
			## this is crazy stuff and need an bug report
			0001-Revert-cpufreq-Avoid-configuring-old-governors-as-de.patch
			revert-parts-of-a00ec3874e7d326ab2dffbed92faddf6a77a84e9-no-Intel-NO.patch
			k10temp-frugalware.patch
			## UKMS Patchset
			https://raw.githubusercontent.com/dolohow/uksm/master/v5.x/uksm-5.13.patch )


for ppatch in "${_F_kernel_patches[@]}"
do
	source+=("$ppatch")
	signatures+=('')
done

source+=("https://www.kernel.org/pub/linux/kernel/v5.x/$_F_archive_name-$pkgver.tar.xz" 'config.x86_64')
signatures+=("https://www.kernel.org/pub/linux/kernel/v5.x/$_F_archive_name-$pkgver.tar.sign" '')

conflicts=('wireguard-linux-compat')
replaces=('wireguard-linux-compat')
provides=('wireguard-linux-compat')


subpkgs=('cpupower')
subdescs=('Kernel cpu powersaving tool')
subrodepends=("kernel=$_F_kernelver_ver")
subdepends=('pciutils')
subgroups=('apps-extra')
subarchs=('x86_64')
subbackup=('etc/sysconfig/cpupower')
subconflicts=('cpufrequtils')
subprovides=('cpufrequtils')
subreplaces=('cpufrequtils')
suboptions=('')
subinstall=('')
source+=("cpupower" "cpupower.sh" "cpupower.service")
signatures+=('' '' '')
makedepends+=('gettext')

subpkgs+=('x86_energy_perf_policy')
subdescs+=('Kernel tool for setting MSR energy policies')
subrodepends+=("kernel=$_F_kernelver_ver")
subdepends+=('pciutils')
subgroups+=('apps-extra')
subarchs+=('x86_64')
subbackup+=('')
subconflicts+=('')
subprovides+=('')
subreplaces+=('')
suboptions+=('')
subinstall+=('')

subpkgs+=('bootconfig')
subdescs+=('Kernel tool for appending cmd line options to a initrd.')
subrodepends+=("kernel=$_F_kernelver_ver")
subdepends+=('')
subgroups+=('apps-extra')
subarchs+=('x86_64')
subbackup+=('')
subconflicts+=('')
subprovides+=('')
subreplaces+=('')
suboptions+=('')
subinstall+=('')

subpkgs+=('perf')
subdescs+=('Kernel performance profiling tool')
subrodepends+=("kernel=$_F_kernelver_ver")
subdepends+=('elfutils slang binutils>=2.35.1 xz python')
subgroups+=('devel-extra')
subarchs+=('x86_64')
subbackup+=('')
subconflicts+=('')
subprovides+=('')
subreplaces+=('')
suboptions+=('')
subinstall+=('')


subpkgs+=("kernel$_F_kernel_name-docs")
subdescs+=("Linux kernel documentation")
subrodepends+=("kernel=$_F_kernelver_ver")
subdepends+=('')
subgroups+=('devel-extra')
subarchs+=('x86_64')
subbackup+=('')
subconflicts+=('')
subprovides+=('')
subreplaces+=('')
suboptions+=('')
subinstall+=('')

subpkgs+=("kernel$_F_kernel_name-source")
subrodepends+=("make gcc>=6.2.1 kernel-headers")
subdescs+=('Linux kernel source')
subgroups+=('devel-extra chroot-core')
subdepends+=('')
subreplaces+=('')
subprovides+=('')
subconflicts+=('')
subarchs+=('x86_64')
subbackup+=('')
subinstall+=('')
suboptions+=('nodocs')

if [ -z "$_F_kernel_name" ]; then
	subpkgs+=('kernel-headers')
	subrodepends+=('')
	subgroups+=('devel devel-core')
	subdescs+=('Linux kernel include files')
	subarchs+=('x86_64')
	subbackup+=('')
	subinstall+=('')
	suboptions+=('')
	subreplaces+=('')
	subdepends+=('')
	subprovides+=('')
	subconflicts+=('')
fi

kmake() {

	make -j $(getconf _NPROCESSORS_ONLN) "$@"
}

build()
{

	Fcd
	Fexec kmake clean || Fdie

	if [ -e "$Fsrcdir/config.$CARCH" ]; then
		Fexec cp $Fsrcdir/config.$CARCH .config || Fdie
	else
		Fmessage "Cannot find a valid config.."
		exit 1
	fi

	# not using Fpatchall here since not applying the patches from
	# _F_kernel_patches() having the wrong extension would be stange :)
	local i

	for i in "${_F_kernel_patches[@]}"
	do
		Fpatch `strip_url $i`
	done

	if Fuse $USE_MAKE_CONFIG; then
		Fdie
	fi

	if [ -z "$_F_kernel_name" -a $_F_kernel_dontfakeversion -eq 0 ]; then
		# stock kernel, nobody interested in the buildsystem's detail
		export KBUILD_BUILD_USER="fst"
		export KBUILD_BUILD_HOST="`uname -m`.frugalware.org"
	fi

	# remove unneded localversions
	rm -fv localversion-*
	rm -fv ../*.{gz,bz2,sign}

	yes "" | kmake config


	if [ $_F_kernel_dontfakeversion -eq 0 ]; then
		if [ "${_F_kernel_ver#*.*.}" = "$_F_kernel_ver" ]; then
			# If patten match fails, sublevel version is missing
			Fsed "SUBLEVEL =.*" "SUBLEVEL =" Makefile
		else
			 Fsed "SUBLEVEL =.*" "SUBLEVEL = ${_F_kernel_ver#*.*.}" Makefile
		fi
		Fsed "EXTRAVERSION =.*" "EXTRAVERSION = $_F_kernel_uname" Makefile
	else
		Fexec kmake include/config/kernel.release
		unset _F_kernel_ver
		_F_kernel_uname=$(cat include/config/kernel.release)
	fi

	## let we do kernel$_F_kernel_name-source before make
	Fmkdir /usr/src
	Fexec cp -Ra $Fsrcdir/linux-$_F_kernelver_ver $Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname || Fdie
	Fln linux-$_F_kernel_ver$_F_kernel_uname /usr/src/linux
	Fexec kmake -C $Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname scripts || Fdie
	Fexec kmake -C $Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname prepare || Fdie

	Fexec rm -rfv $Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname/{.git,.gitignore,.config.old,Documentation,COPYING,CREDITS,MAINTAINERS,README} || Fdie
	Fexec rm -rff $Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname/usr/ || Fdie

	# Workaround for permissions bug
	Ffileschmod usr/src/linux-$_F_kernel_ver$_F_kernel_uname/include/generated 644

	Fsplit kernel$_F_kernel_name-source usr/src

	## now the kernel$_F_kernel_name-docs
	Fmkdir /usr/src/linux-$_F_kernel_ver$_F_kernel_uname
	Fexec cp -Ra $Fsrcdir/linux-$_F_kernelver_ver/{Documentation,COPYING,CREDITS,MAINTAINERS,README} \
				$Fdestdir/usr/src/linux-$_F_kernel_ver$_F_kernel_uname || Fdie
	## do we need to ln /usr/share/doc ?!
	Fsplit kernel$_F_kernel_name-docs usr/src


	if [ -z "$_F_kernel_name" ]; then
		Fexec kmake INSTALL_HDR_PATH=$Fdestdir/usr headers_install || Fdie
		[ -e $Fdestdir/usr/include/scsi ] && Frm /usr/include/scsi
		[ -e $Fdestdir/usr/include/drm ] && Frm /usr/include/drm
		Fsplit kernel-headers /usr
	fi

	## now time to eat some cookies and wait the kernel got compiled :)
	## use verbose by default, we want to know what is going on...
	Fexec kmake V=1 || Fdie

	Fmkdir /boot
	Fmkdir /lib/modules
	Ffilerel .config /boot/config-$_F_kernel_ver$_F_kernel_uname
	if [ ! -z "$_F_kernel_vmlinuz" ]; then
		Ffilerel $_F_kernel_vmlinuz /boot/$_F_kernel_path-$_F_kernel_ver$_F_kernel_uname
	else
		Ffilerel arch/x86/boot/bzImage /boot/$_F_kernel_path-$_F_kernel_ver$_F_kernel_uname
	fi

	Fln config-$_F_kernel_ver$_F_kernel_uname /boot/config
	Fln System.map-$_F_kernel_ver$_F_kernel_uname /boot/System.map
	Fln $_F_kernel_path-$_F_kernel_ver$_F_kernel_uname /boot/$_F_kernel_path

	Fexec kmake INSTALL_MOD_PATH=$Fdestdir $MAKEFLAGS modules_install || Fdie
	# dump symol versions so that later builds will have dependencies and
	# modversions
	Ffilerel System.map /boot/System.map-$_F_kernel_ver$_F_kernel_uname
	Ffilerel /usr/src/linux-$_F_kernel_ver$_F_kernel_uname/Module.symvers

	# Since kernel 5.10 this is needed to build external modules
	Ffilerel scripts/module.lds /usr/src/linux-$_F_kernel_ver$_F_kernel_uname/scripts/module.lds
	Frm /lib/modules/$_F_kernel_ver$_F_kernel_uname/build
	Frm /lib/modules/$_F_kernel_ver$_F_kernel_uname/source

	Fln /usr/src/linux-$_F_kernel_ver$_F_kernel_uname /lib/modules/$_F_kernel_ver$_F_kernel_uname/build
	Fln /usr/src/linux-$_F_kernel_ver$_F_kernel_uname /lib/modules/$_F_kernel_ver$_F_kernel_uname/source

	Fsplit kernel$_F_kernel_name-source usr/src/linux-$_F_kernel_ver$_F_kernel_uname/Module.symvers
	Fsplit kernel$_F_kernel_name-source usr/src/linux-$_F_kernel_ver$_F_kernel_uname/scripts/module.lds

	Fexec /sbin/depmod -a -b $Fdestdir $_F_kernel_ver$_F_kernel_uname || Fdie

	# build bootconfig
	Fexec cd tools/bootconfig
	Fexec kmake || Fdie
	Fexec kmake DESTDIR="$Fdestdir" install || Fdie
	Fsplit bootconfig usr/sbin

	Fexec cd ../..

	# build cpupower
	Fexec cd tools/power/cpupower

	Fexec kmake clean || Fdie

	Fsed '$(OPTIMIZATION) -fomit-frame-pointer' "$CFLAGS" Makefile
	Fsed 'lib64' 'lib' Makefile
	Fexec kmake DEBUG=false CPUFREQ_BENCH=false || Fdie
	Fexec kmake DESTDIR="$Fdestdir" CPUFREQ_BENCH=false install || Fdie
	Fmv /usr/man /usr/share
	Ffile /etc/sysconfig/cpupower
	Fexe /usr/sbin/cpupower.sh
	Ffile /lib/systemd/system/cpupower.service

	Fsplit cpupower etc/
	Fsplit cpupower lib/systemd
	Fsplit cpupower usr/bin/
	Fsplit cpupower usr/include/
	Fsplit cpupower usr/lib/
	Fsplit cpupower usr/sbin/
	Fsplit cpupower usr/share/

	# build x86_energy_perf_policy
	Fexec cd ../x86/x86_energy_perf_policy
	Fexec kmake clean || Fdie
	Fsed '$(OPTIMIZATION) -fomit-frame-pointer' "$CFLAGS" Makefile
	Fexec kmake  || Fdie
	Fmkdir usr/bin usr/share/man/man8
	Fexec kmake DESTDIR="$Fdestdir" install || Fdie

	Fsplit x86_energy_perf_policy usr/bin/
	Fsplit x86_energy_perf_policy usr/share/

	# build perf
	Fexec cd ../../../perf

	Fsed "lib64" "lib" Makefile.config
	Fsed "libexec/perf-core" "lib/perf/perf-core" Makefile.config
	Fexec kmake  						\
		WERROR=0						\
		DESTDIR="$Fdestdir/usr"        	\
		NO_GTK2=1                      	\
		NO_LIBAUDIT=1                  	\
		NO_LIBNUMA=1                   	\
		NO_LIBUNWIND=1                 	\
		PERF_VERSION="$pkgver-$pkgrel" 	\
		install || Fdie

	Fmv /usr/etc /etc/
	Frm /usr/etc
	Fsplit perf etc/
	Fsplit perf usr/bin/
	Fsplit perf usr/share/
	Fsplit perf usr/lib

}

# optimization OK