Bash aliases to aid in kernel dev

.bash_aliases

kgit-config() {
	git config user.name "Your name"
	git config user.email "[email protected]"
	git config commit.gpgsign false
	git config pull.rebase true
	
	git config sendemail.smtpServer "smtp.email.com"
	git config sendemail.smtpEncryption tls
	git config sendemail.smtpServerPort 587
	git config sendemail.smtpUser "[email protected]"
	git config sendemail.confirm "always"
	
	echo -e '#!/bin/bash
		
		patch=$(git show --format=email HEAD)
		./scripts/checkpatch.pl --show-types --strict --codespell - <<< "$patch"
	' | awk '{$1=$1};1' > .git/hooks/post-commit
	chmod u+x .git/hooks/post-commit
}

alias git-config-kernel=kgit-config


alias kcheckpatch="git diff | ./scripts/checkpatch.pl --show-types --strict - "


kconfig() {
	case "$1" in
		"--def")
			make defconfig "${@:5}"
			./scripts/kconfig/merge_config.sh .config \
				./kernel/configs/kvm_guest.config \
				$HOME/linux/config/common.config
			;;

		"--fix")
			./scripts/kconfig/merge_config.sh .config \
				./kernel/configs/kvm_guest.config \
				$HOME/linux/config/common.config
			;;

		"--virt")
			virtme-configkernel --arch=x86_64 --defconfig "${@:6}"
			./scripts/kconfig/merge_config.sh .config \
				$HOME/linux/config/common.config
			;;

		"--debug")
			./scripts/kconfig/merge_config.sh .config \
				./kernel/configs/kvm_guest.config \
				./kernel/configs/debug.config \
				$HOME/linux/config/common.config \
				$HOME/linux/config/tracing.config
			;;

		"--merge")
			if [[ "$2" == "" ]]; then
				echo "Which config in the config folder?"
			else
				./scripts/kconfig/merge_config.sh .config \
					"$HOME/linux/config/$2.config"
			fi
			;;

		"--single")
			./scripts/kconfig/merge_config.sh .config
			;;

		*)
			printf "Pass --def, --fix, --virt, --debug, --merge, "
			printf "or --single.\n"
			;;
	esac
}


kmake-all() {
	(
		set -e

		if [[ -f ".llvm" ]]; then
			echo -e ".llvm found - Using LLVM.\n"
			make -j18 all LLVM=1 "$@"
		else
			echo -e ".llvm not found - Using GCC\n"
			make -j18 all "$@"
		fi

		# Store loadable modules so we can use in QEMU via virtfs.
		# Note: We clear the old folder to avoid failing mkdir et al.
		rm -rf .compiled_modules
		make INSTALL_MOD_PATH=./.compiled_modules modules_install

		# Symlink to local dir in /lib/modules/*/build won't work in
		# the VM, so remove it and just add the config file there.
		rm ./.compiled_modules/lib/modules/*/build
		mkdir $(ls -d ./.compiled_modules/lib/modules/*)/build
		cp .config ./.compiled_modules/lib/modules/*/build
	)
}


kemulate() {
	qemu_args=""

	# We will pass user args to QEMU, except the flags.
	# Since flag processing is needed, we will append them in the end.
	# Also, by appending the user args at the end, the default arguments
	# can be overriden by user.
	user_args="$@"

	# Use host for the KVM on terminal.
	qemu_args+="-cpu host -accel kvm -nographic"
	qemu_args+=" "

	# Memory size.
	qemu_args+="-m 4G"
	qemu_args+=" "

	# Number of cores.
	qemu_args+="-smp 6"
	qemu_args+=" "

	# Kernel image location.
	qemu_args+="-kernel ./arch/x86_64/boot/bzImage"
	qemu_args+=" "

	# Kernel command line parameters.
	qemu_args+="-append \""
	qemu_args+="console=ttyS0 root=/dev/sda earlyprintk=serial nokaslr "
	qemu_args+="net.ifnames=0 panic_on_warn=1 panic_on_io_nmi=1 "
	qemu_args+="panic_on_rcu_stall=1 max_rcu_stall_to_panic=1 "
	qemu_args+="panic_on_unrecovered_nmi=1"

	if [[ "$1" == "--selinux" ]]; then
		qemu_args+=" selinux=1"
		user_args="${user_args:9}"
	else
		qemu_args+=" selinux=0"
	fi

	qemu_args+="\" "

	# Debian image to boot.
	qemu_args+="-drive file=$HOME/linux/qemu/image/bookworm.img,"
	qemu_args+="format=raw"
	qemu_args+=" "

	# User settings for SSH.
	qemu_args+="-net user,host=10.0.2.10,hostfwd=tcp:127.0.0.1:10021-:22"
	qemu_args+=" "

	# NIC settings.
	qemu_args+="-net nic,model=e1000"
	qemu_args+=" "

	# PID file.
	qemu_args+="-pidfile vm.pid"
	qemu_args+=" "

	# Use virtfs to get access to loadable modules inside QEMU.
	qemu_args+="-virtfs local,path=./.compiled_modules/lib/modules,"
	qemu_args+="mount_tag=compiled_modules,security_model=passthrough"
	qemu_args+=" "

	# Append the user args.
	qemu_args+="$user_args"

	# Run QEMU (eval used to avoid bash splitting arguments on spaces)
	eval "qemu-system-x86_64 $qemu_args 2>&1 | tee vm.log"
}


alias kemulate-one="kemulate -smp 1"


kemulate-virt() {
	kernel="./arch/x86_64/boot/bzImage"
	stretch_image="$HOME/linux/qemu/image/stretch.img"

	qemu_args="$@"

	cmd_line="console=ttyS0 root=/dev/sda earlyprintk=serial "
	cmd_line+="net.ifnames=0 nokaslr "

	if [[ "$1" == "--selinux" ]]; then
		cmd_line+="selinux=1"
		qemu_args="${qemu_args:9}"
	else
		cmd_line+="selinux=0"
	fi

	virtme-run \
		--kdir . \
		--mods auto \
		--rw \
		--graphics \
		--qemu-opts \
			-m 4G \
			-smp 6 \
			-kernel "$kernel" \
			-append "$cmd_line" \
			-drive file=$stretch_image,format=raw \
			-net user,host=10.0.2.10,hostfwd=tcp:127.0.0.1:10021-:22 \
			-net nic,model=e1000 \
			-cpu host \
			-pidfile vm.pid \
			-vga virtio \
			-display gtk,gl=on \
			$qemu_args \
	2>&1 | tee vm.log
}


klogin() {
	ssh -i $HOME/linux/qemu/image/stretch.id_rsa \
		-p 10021 -o "StrictHostKeyChecking no" root@localhost \
	2>&1 | tee ssh_op.log
}


syzkemu() {
	syzkaller_dir="$HOME/linux/syzkaller"

	scp -P 10021 -i $HOME/linux/qemu/image/stretch.id_rsa \
		$syzkaller_dir/bin/linux_amd64/syz-execprog \
		$syzkaller_dir/bin/linux_amd64/syz-executor \
		root@localhost:/root/syz/
}


ktrace-decode() {
	if [[ "$1" == "" || "$2" == "" ]]; then
		echo "Provide input and output filenames."
		exit 1
	fi

	(./scripts/decode_stacktrace.sh vmlinux < "$1") > "$2"
}


kget-maintainers() {
	./scripts/get_maintainer.pl "$@"
}


kunit-drm-run() {
	make ARCH=um mrproper

	./tools/testing/kunit/kunit.py run \
		--kunitconfig=drivers/gpu/drm/tests/ \
		--make_options=LLVM=1 \
		--kunitconfig=$HOME/linux/kunit.config
}


kunit-drm-coverage() {
	make ARCH=um mrproper

	./tools/testing/kunit/kunit.py run \
		--kunitconfig=drivers/gpu/drm/tests/ \
		--make_options=CC=gcc-6 \
		--kunitconfig=$HOME/linux/kunit.config

	lcov -t "kunit_tests" -o coverage.info -c -d .kunit/ \
		--gcov-tool=gcov-6

	genhtml -o /tmp/coverage_html coverage.info

	firefox /tmp/coverage_html/drivers/gpu/drm/index.html
}


ksend-patch() {
	# This is for sending a single patch with Thunderbird.
	# Prefer git send-email though, the existence of this
	# implies I already tried to skirt it, unsuccessfully.

	# Need argument for commit.
	if [ $# -eq 0 ]; then
		echo "Provide at least commit ID / branch."
		return 1
	fi

	# Create and check the patch.
	patch=$(git format-patch --stdout "$@")
	echo -e "$patch\n\n"

	./scripts/checkpatch.pl --show-types --strict -  <<< "$patch"
	if [ $? -ne 0 ]; then
		# Last command failed.
		return 1
	fi

	# Remove the first three lines, it is in mbox format but we are going for a GUI client.
	patch=$(sed -e '1,3d' <<< "$patch")

	if [[ ${patch:15:1} == "]" ]]; then  # Starts with "Subject: [PATCH]"
		# Save and remove the subject line.
		subject=${patch#"Subject: "}
		subject=${subject%%$'\n'*}

		patch=${patch#*$'\n'}
		patch="${patch:1}"  # Removes the remaining newline.
	else
		echo "Supplied multiple patches in one email. Don't do it."
		return 1
	fi

	thunderbird -compose "format='text',subject='$subject',body='$patch'" > /dev/null 2>&1 &
	disown
}

common.config

CONFIG_DYNAMIC_DEBUG=y
CONFIG_DEBUG_FS=y
CONFIG_CONFIGFS_FS=y
CONFIG_SECURITYFS=y

CONFIG_DEBUG_INFO=y

CONFIG_KASAN=y
CONFIG_UBSAN=y

CONFIG_PANIC_ON_OOPS=y
CONFIG_PANIC_ON_OOPS_VALUE=1
CONFIG_PANIC_TIMEOUT=0


CONFIG_PREEMPT_BUILD=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_COUNT=y
CONFIG_PREEMPTION=y
CONFIG_PREEMPT_DYNAMIC=y
CONFIG_SCHED_CORE=y
CONFIG_PREEMPT_RCU=y
CONFIG_PREEMPT_NOTIFIERS=y

CONFIG_LOCKUP_DETECTOR=y

CONFIG_SOFTLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y

CONFIG_HAVE_HARDLOCKUP_DETECTOR_BUDDY=y
CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HARDLOCKUP_DETECTOR_COUNTS_HRTIMER=y
CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y

CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=140
CONFIG_BOOTPARAM_HUNG_TASK_PANIC=y
CONFIG_WQ_WATCHDOG=y

CONFIG_TUN=y


CONFIG_FAULT_INJECTION=y
CONFIG_FAILSLAB=y
CONFIG_FAIL_PAGE_ALLOC=y
CONFIG_FAULT_INJECTION_USERCOPY=y
CONFIG_FAIL_MAKE_REQUEST=y
CONFIG_FAIL_IO_TIMEOUT=y
CONFIG_FAIL_FUTEX=y
CONFIG_FAULT_INJECTION_DEBUG_FS=y

keyutils.config

CONFIG_KEYS=y
CONFIG_TMPFS=y
CONFIG_CRYPTO_LIB_CHACHA20POLY1305=y
CONFIG_BIG_KEYS=y

CONFIG_TRUSTED_KEYS=y
CONFIG_SYSTEM_TRUSTED_KEYRING=y
CONFIG_SECONDARY_TRUSTED_KEYRING=y
CONFIG_SYSTEM_BLACKLIST_KEYRING=y

# Generate a dummy key with:
# openssl req -x509 -newkey rsa:4096 -out key.pem -sha256 -nodes -subj "/CN=."
CONFIG_SYSTEM_TRUSTED_KEYS="key.pem"

CONFIG_CRYPTO_DH=y
CONFIG_KEY_DH_OPERATIONS=y

CONFIG_INTEGRITY=y
CONFIG_INTEGRITY_SIGNATURE=y
CONFIG_INTEGRITY_ASYMMETRIC_KEYS=y
CONFIG_INTEGRITY_TRUSTED_KEYRING=y

kunit.config

CONFIG_VIRTIO_UML=y
CONFIG_UML_PCI_OVER_VIRTIO=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_GCOV=y

tracing.config

CONFIG_KCOV=y
CONFIG_KASAN=y
CONFIG_KASAN_INLINE=y
CONFIG_FTRACE=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_IRQSOFF_TRACER=y
CONFIG_PREEMPT_TRACER=y
CONFIG_SCHED_TRACER=y
CONFIG_STACK_TRACER=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_FUNCTION_PROFILER=y
CONFIG_FTRACE_MCOUNT_RECORD=y

CONFIG_NET_9P_DEBUG=y

I force-pushed squashing changes.