Re: [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework

On Sat,  8 Aug 2026 06:44:21 +0900
"Masami Hiramatsu (Google)" <[email protected]> wrote:

> From: Masami Hiramatsu (Google) <[email protected]>
> 
> Add an automated test framework under
> tools/testing/selftests/ftrace/boottime/ to verify boot-time tracing
> configuration parsing.
> 
> The test runner (run_boottime_test.sh) sources ktap_helpers.sh to
> generate output in TAP version 13 format. It builds a minimal
> initramfs with busybox, attaches bootconfig examples using
> tools/bootconfig/bootconfig, boots QEMU, and runs corresponding
> tracefs checker scripts.

This needs more fix which Sashiko pointed. But I think I rather like
to rewrite this for more generic boot time tracing, including
kernel cmdline not only bootconfig, and persistent ring buffer
etc. We does not have a functional test for such features in
ftracetest, because ftracetest only runs after boot.
So let me pick [1/2] and make another series for this test.


Thank you,

> 
> Assisted-by: Antigravity:gemini-3.6-flash
> Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
> 
> Changes in v3:
>  - Remove boottime/run_boottime_test.sh from TEST_PROGS_EXTENDED in Makefile
>    to prevent lib.mk from flattening it into top-level ftrace/ on make install.
>  - Support executing run_boottime_test.sh both in-tree and in installed
>    kselftest environment.
>  - Add HUP, INT, and TERM signal handlers to tempdir cleanup trap.
>  - Validate workdir creation and update run_single_test() to return 0 on test
>    failures so set -e is not suspended by invocation in an AND-OR list.
> 
> Changes in v2:
>  - Copy shared library dependencies using ldd if busybox is dynamically
>    linked.
>  - Wrap QEMU execution with timeout command and add -T/--timeout CLI
>    option.
>  - Add pre-flight checks for busybox architecture compatibility and
>    cpio tool in run_boottime_test.sh.
>  - Fix POSIX syntax compatibility and allow bypassing HOST_ARCH skip
>    when custom kernel/QEMU parameters are passed.
>  - Add boottime/run_boottime_test.sh to TEST_PROGS_EXTENDED in
>    selftests/ftrace/Makefile.
> ---
>  tools/testing/selftests/ftrace/Makefile            |    2 
>  tools/testing/selftests/ftrace/boottime/Makefile   |   10 +
>  tools/testing/selftests/ftrace/boottime/README     |   58 ++++
>  .../ftrace/boottime/bootconfigs/01-kprobe.bconf    |    5 
>  .../ftrace/boottime/bootconfigs/02-synth.bconf     |    4 
>  .../ftrace/boottime/bootconfigs/03-eprobe.bconf    |    4 
>  .../ftrace/boottime/bootconfigs/04-fprobe.bconf    |    4 
>  .../ftrace/boottime/bootconfigs/05-tprobe.bconf    |    4 
>  .../ftrace/boottime/bootconfigs/06-instance.bconf  |    5 
>  .../selftests/ftrace/boottime/run_boottime_test.sh |  271 ++++++++++++++++++++
>  .../selftests/ftrace/boottime/tests/01-kprobe.sh   |   18 +
>  .../selftests/ftrace/boottime/tests/02-synth.sh    |   18 +
>  .../selftests/ftrace/boottime/tests/03-eprobe.sh   |   18 +
>  .../selftests/ftrace/boottime/tests/04-fprobe.sh   |   18 +
>  .../selftests/ftrace/boottime/tests/05-tprobe.sh   |   18 +
>  .../selftests/ftrace/boottime/tests/06-instance.sh |   23 ++
>  tools/testing/selftests/ftrace/config              |    4 
>  17 files changed, 483 insertions(+), 1 deletion(-)
>  create mode 100644 tools/testing/selftests/ftrace/boottime/Makefile
>  create mode 100644 tools/testing/selftests/ftrace/boottime/README
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
>  create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
>  create mode 100755 tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
>  create mode 100755 tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> 
> diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile
> index 7c12263f8260..8d8881744149 100644
> --- a/tools/testing/selftests/ftrace/Makefile
> +++ b/tools/testing/selftests/ftrace/Makefile
> @@ -3,7 +3,7 @@ all:
>  
>  TEST_PROGS_EXTENDED := ftracetest
>  TEST_PROGS := ftracetest-ktap
> -TEST_FILES := test.d settings
> +TEST_FILES := test.d settings boottime
>  EXTRA_CLEAN := $(OUTPUT)/logs/*
>  
>  TEST_GEN_FILES := poll
> diff --git a/tools/testing/selftests/ftrace/boottime/Makefile b/tools/testing/selftests/ftrace/boottime/Makefile
> new file mode 100644
> index 000000000000..fd0975350f10
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/Makefile
> @@ -0,0 +1,10 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +all:
> +
> +run_tests:
> +	@./run_boottime_test.sh
> +
> +clean:
> +
> +.PHONY: all run_tests clean
> diff --git a/tools/testing/selftests/ftrace/boottime/README b/tools/testing/selftests/ftrace/boottime/README
> new file mode 100644
> index 000000000000..a6f930a6e44c
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/README
> @@ -0,0 +1,58 @@
> +Boot-Time Tracing Test Suite
> +============================
> +
> +This directory contains an automated test framework to verify kernel boot-time
> +tracing configuration parsing and tracefs application during early boot.
> +
> +Overview
> +--------
> +The test runner (`run_boottime_test.sh`) constructs a lightweight initramfs with
> +busybox and a tracefs checker script from `tests/`, attaches a bootconfig example
> +from `bootconfigs/` using the `bootconfig` tool, boots the target kernel image under
> +QEMU, and reports results according to the TAP version 13 format.
> +
> +Required Tools
> +--------------
> +- Host Architecture: x86 (x86_64/i686/i386/x86; tests skip on non-x86 hosts)
> +- `qemu-system-x86_64` (or custom QEMU executable)
> +- `busybox` (host binary at `/usr/bin/busybox` or custom path)
> +- `bootconfig` (compiled from `tools/bootconfig/bootconfig` or in PATH)
> +- `cpio` (standard archiver)
> +
> +Required Kernel Configurations
> +------------------------------
> +The kernel binary under test must be compiled with:
> +- `CONFIG_BOOT_CONFIG=y`
> +- `CONFIG_BOOTTIME_TRACING=y`
> +
> +Additional feature-specific config options enable respective testcases:
> +- `CONFIG_KPROBE_EVENTS=y` (for `01-kprobe`)
> +- `CONFIG_SYNTH_EVENTS=y`  (for `02-synth`)
> +- `CONFIG_EPROBE_EVENTS=y` (for `03-eprobe`)
> +- `CONFIG_FPROBE_EVENTS=y` (for `04-fprobe` and `05-tprobe`)
> +- `CONFIG_FUNCTION_TRACER=y` (for tracer options in `06-instance`)
> +
> +Usage
> +-----
> +To run all test cases with a compiled kernel image:
> +
> +  $ ./run_boottime_test.sh -k /path/to/bzImage
> +
> +To run a specific test case (e.g. `01-kprobe`):
> +
> +  $ ./run_boottime_test.sh -k /path/to/bzImage -t 01-kprobe
> +
> +Customizing Tool Paths:
> +
> +  $ ./run_boottime_test.sh -b /path/to/bootconfig \
> +                         -k /path/to/bzImage \
> +                         -q /path/to/qemu-system-x86_64 \
> +                         -B /path/to/busybox
> +
> +Environment Variables
> +---------------------
> +Tool locations and kernel paths can also be set via environment variables:
> +- `BOOTCONFIG`: Path to the `bootconfig` tool
> +- `KERNEL`: Path to the `bzImage` kernel binary
> +- `QEMU`: Path to the QEMU binary
> +- `BUSYBOX`: Path to the `busybox` binary
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> new file mode 100644
> index 000000000000..f607840e3858
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> @@ -0,0 +1,5 @@
> +ftrace.event.kprobes.vfs_read {
> +	probes = "vfs_read $arg1 $arg2"
> +	filter = "common_pid < 200"
> +	enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> new file mode 100644
> index 000000000000..b1f37713f33c
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.synthetic.boot_lat {
> +	fields = "unsigned long id", "u64 delta"
> +	enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> new file mode 100644
> index 000000000000..f954aa7fb8bd
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.eprobes.ep_read {
> +	probes = "syscalls/sys_enter_openat"
> +	enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> new file mode 100644
> index 000000000000..82ae2ac0629f
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.fprobes.fp_read {
> +	probes = "vfs_read"
> +	enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> new file mode 100644
> index 000000000000..02a2803c770a
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.tracepoints.tp_sched {
> +	probes = "sched_switch"
> +	enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> new file mode 100644
> index 000000000000..31f81da570ea
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> @@ -0,0 +1,5 @@
> +ftrace.instance.foo {
> +	event.sched.sched_switch.enable
> +	buffer_size = 1MB
> +	tracing_on = 1
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> new file mode 100755
> index 000000000000..7ba1afc91c35
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> @@ -0,0 +1,271 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Boot-time tracing test runner
> +# Builds a lightweight initramfs, attaches a bootconfig, boots QEMU,
> +# and verifies tracefs configuration using test scripts.
> +
> +set -e
> +
> +SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
> +if [ -d "$SCRIPT_DIR/boottime" ]; then
> +	SCRIPT_DIR="$SCRIPT_DIR/boottime"
> +fi
> +KERNEL_SRC="$(cd "$SCRIPT_DIR/../../../../.." && pwd)"
> +
> +# Source KTAP helpers
> +if [ -f "$SCRIPT_DIR/../../kselftest/ktap_helpers.sh" ]; then
> +	KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../../kselftest" && pwd)"
> +elif [ -f "$SCRIPT_DIR/../kselftest/ktap_helpers.sh" ]; then
> +	KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../kselftest" && pwd)"
> +else
> +	echo "Error: ktap_helpers.sh not found relative to $SCRIPT_DIR"
> +	exit 1
> +fi
> +. "$KSELFTEST_DIR/ktap_helpers.sh"
> +
> +BOOTCONFIG="${BOOTCONFIG:-"$KERNEL_SRC/tools/bootconfig/bootconfig"}"
> +KERNEL="${KERNEL:-"$KERNEL_SRC/arch/x86/boot/bzImage"}"
> +QEMU="${QEMU:-"qemu-system-x86_64"}"
> +BUSYBOX="${BUSYBOX:-"$(which busybox 2>/dev/null || echo "/usr/bin/busybox")"}"
> +TIMEOUT="${TIMEOUT:-30s}"
> +TARGET_TEST="all"
> +
> +usage() {
> +	echo "Usage: $0 [options]"
> +	echo "Options:"
> +	echo "  -b, --bootconfig PATH   Path to bootconfig tool (default: $BOOTCONFIG)"
> +	echo "  -k, --kernel PATH       Path to kernel image (default: $KERNEL)"
> +	echo "  -q, --qemu PATH         Path to QEMU executable (default: $QEMU)"
> +	echo "  -B, --busybox PATH      Path to busybox binary (default: $BUSYBOX)"
> +	echo "  -T, --timeout DURATION  QEMU execution timeout (default: $TIMEOUT)"
> +	echo "  -t, --test NAME         Run specific test (e.g. 01-kprobe) or 'all'"
> +	echo "  -h, --help              Show this help message"
> +	exit 1
> +}
> +
> +while [ $# -gt 0 ]; do
> +	case "$1" in
> +		-b|--bootconfig)
> +			BOOTCONFIG="$2"
> +			shift 2
> +			;;
> +		-k|--kernel)
> +			KERNEL="$2"
> +			shift 2
> +			;;
> +		-q|--qemu)
> +			QEMU="$2"
> +			shift 2
> +			;;
> +		-B|--busybox)
> +			BUSYBOX="$2"
> +			shift 2
> +			;;
> +		-T|--timeout)
> +			TIMEOUT="$2"
> +			shift 2
> +			;;
> +		-t|--test)
> +			TARGET_TEST="$2"
> +			shift 2
> +			;;
> +		-h|--help)
> +			usage
> +			;;
> +		*)
> +			echo "Unknown option: $1"
> +			usage
> +			;;
> +	esac
> +done
> +
> +# Check host architecture
> +HOST_ARCH="$(uname -m)"
> +case "$HOST_ARCH" in
> +	x86_64|i686|i386|x86)
> +		;;
> +	*)
> +		if [ "$KERNEL" = "$KERNEL_SRC/arch/x86/boot/bzImage" ]; then
> +			ktap_print_header
> +			ktap_skip_all \
> +				"Default boot-time tracing test is x86 only ($HOST_ARCH)"
> +			exit 0
> +		fi
> +		;;
> +esac
> +
> +# Ensure bootconfig tool is built if Makefile exists
> +if [ ! -x "$BOOTCONFIG" ]; then
> +	if [ -f "$KERNEL_SRC/tools/bootconfig/Makefile" ]; then
> +		make -C "$KERNEL_SRC/tools/bootconfig" > /dev/null 2>&1 || true
> +	fi
> +	if [ ! -x "$BOOTCONFIG" ]; then
> +		BOOTCONFIG="$(which bootconfig 2>/dev/null || true)"
> +	fi
> +fi
> +
> +if [ ! -x "$BOOTCONFIG" ]; then
> +	ktap_print_header
> +	ktap_skip_all "bootconfig tool not found at $BOOTCONFIG"
> +	exit 0
> +fi
> +
> +if [ ! -f "$KERNEL" ]; then
> +	ktap_print_header
> +	ktap_skip_all "Kernel image not found at $KERNEL"
> +	exit 0
> +fi
> +
> +if ! command -v "$QEMU" >/dev/null 2>&1; then
> +	ktap_print_header
> +	ktap_skip_all "QEMU binary not found: $QEMU"
> +	exit 0
> +fi
> +
> +if [ ! -x "$BUSYBOX" ]; then
> +	ktap_print_header
> +	ktap_skip_all "busybox binary not found at $BUSYBOX"
> +	exit 0
> +fi
> +
> +# Verify busybox architecture compatibility
> +if command -v file >/dev/null 2>&1; then
> +	BUSYBOX_INFO="$(file -b "$BUSYBOX" 2>/dev/null || true)"
> +	case "$KERNEL" in
> +		*x86*)
> +			case "$BUSYBOX_INFO" in
> +				*x86-64*|*x86_64*|*80386*|*i386*)
> +					;;
> +				*)
> +					ktap_print_header
> +					ktap_skip_all "busybox binary architecture is incompatible with x86 kernel ($BUSYBOX_INFO)"
> +					exit 0
> +					;;
> +			esac
> +			;;
> +	esac
> +fi
> +
> +if ! command -v cpio >/dev/null 2>&1; then
> +	ktap_print_header
> +	ktap_skip_all "cpio tool not found"
> +	exit 0
> +fi
> +
> +run_single_test() {
> +	local bconf_file="$1"
> +	local test_script="$2"
> +	local name="$(basename "$bconf_file" .bconf)"
> +
> +	local workdir="$(mktemp -d)"
> +	if [ -z "$workdir" ] || [ ! -d "$workdir" ]; then
> +		ktap_test_fail "$name (failed to create temporary directory)"
> +		return 0
> +	fi
> +	trap 'rm -rf "$workdir"' EXIT HUP INT TERM
> +
> +	local rootfs="$workdir/rootfs"
> +	mkdir -p "$rootfs"/{bin,sbin,etc,proc,sys,dev,tmp}
> +
> +	cp "$BUSYBOX" "$rootfs/bin/busybox"
> +	chmod +x "$rootfs/bin/busybox"
> +	(cd "$rootfs/bin" && for applet in sh cat mount umount echo sync reboot \
> +		poweroff cpio grep; do ln -s busybox $applet; done)
> +
> +	if command -v ldd >/dev/null 2>&1; then
> +		for lib in $(ldd "$BUSYBOX" 2>/dev/null | grep -o '/[^ ]*'); do
> +			if [ -f "$lib" ]; then
> +				mkdir -p "$rootfs$(dirname "$lib")"
> +				cp -L "$lib" "$rootfs$lib" 2>/dev/null || true
> +			fi
> +		done
> +	fi
> +
> +	cat << 'EOF' > "$rootfs/init"
> +#!/bin/sh
> +mount -t proc proc /proc 2>/dev/null
> +mount -t sysfs sys /sys 2>/dev/null
> +mount -t tracefs nodev /sys/kernel/tracing 2>/dev/null
> +
> +/bin/check_test.sh
> +RET=$?
> +
> +if [ $RET -eq 0 ]; then
> +	echo "TEST RESULT: PASS"
> +else
> +	echo "TEST RESULT: FAIL"
> +fi
> +
> +sync
> +echo o > /proc/sysrq-trigger 2>/dev/null || reboot -f 2>/dev/null || poweroff -f 2>/dev/null
> +EOF
> +	chmod +x "$rootfs/init"
> +
> +	cp "$test_script" "$rootfs/bin/check_test.sh"
> +	chmod +x "$rootfs/bin/check_test.sh"
> +
> +	local initramfs="$workdir/initramfs.cpio"
> +	(cd "$rootfs" && find . | cpio -o -H newc --quiet) > "$initramfs"
> +
> +	# Attach bootconfig
> +	"$BOOTCONFIG" -a "$bconf_file" "$initramfs" > /dev/null
> +
> +	# Run QEMU with timeout
> +	local timeout_cmd=""
> +	if command -v timeout >/dev/null 2>&1; then
> +		timeout_cmd="timeout $TIMEOUT"
> +	fi
> +
> +	local logfile="$workdir/qemu.log"
> +	$timeout_cmd "$QEMU" -kernel "$KERNEL" \
> +		-initrd "$initramfs" \
> +		-append "bootconfig console=ttyS0 quiet panic=-1" \
> +		-nographic \
> +		-no-reboot > "$logfile" 2>&1 || true
> +
> +	if grep -q "TEST RESULT: PASS" "$logfile"; then
> +		ktap_test_pass "$name"
> +	else
> +		ktap_test_fail "$name"
> +		ktap_print_msg "QEMU Console Output for $name:"
> +		while IFS= read -r line; do
> +			ktap_print_msg "$line"
> +		done < "$logfile"
> +	fi
> +
> +	rm -rf "$workdir"
> +	trap - EXIT HUP INT TERM
> +	return 0
> +}
> +
> +TEST_FILES=("$SCRIPT_DIR/bootconfigs"/*.bconf)
> +TOTAL_TESTS=0
> +for bconf in "${TEST_FILES[@]}"; do
> +	name="$(basename "$bconf" .bconf)"
> +	if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
> +		continue
> +	fi
> +	TOTAL_TESTS=$((TOTAL_TESTS + 1))
> +done
> +
> +ktap_print_header
> +ktap_set_plan "$TOTAL_TESTS"
> +
> +for bconf in "${TEST_FILES[@]}"; do
> +	name="$(basename "$bconf" .bconf)"
> +	test_script="$SCRIPT_DIR/tests/$name.sh"
> +
> +	if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
> +		continue
> +	fi
> +
> +	if [ ! -f "$test_script" ]; then
> +		ktap_test_skip "$name (test script missing)"
> +		continue
> +	fi
> +
> +	run_single_test "$bconf" "$test_script"
> +done
> +
> +ktap_finished
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> new file mode 100755
> index 000000000000..a20e7e82d158
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check kprobe bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/kprobes/vfs_read" ]; then
> +	echo "FAIL: kprobe event kprobes/vfs_read does not exist"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/kprobes/vfs_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: kprobe event kprobes/vfs_read is not enabled ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 01-kprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> new file mode 100755
> index 000000000000..46d3b152cbea
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check synthetic event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/synthetic/boot_lat" ]; then
> +	echo "FAIL: synthetic event synthetic/boot_lat does not exist"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/synthetic/boot_lat/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: synthetic event synthetic/boot_lat is not enabled ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 02-synth"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> new file mode 100755
> index 000000000000..108f9ba31c06
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check eprobe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/eprobes/ep_read" ]; then
> +	echo "FAIL: eprobe event eprobes/ep_read does not exist"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/eprobes/ep_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: eprobe event eprobes/ep_read is not enabled ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 03-eprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> new file mode 100755
> index 000000000000..c0a316bf7dde
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check fprobe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/fprobes/fp_read" ]; then
> +	echo "FAIL: fprobe event fprobes/fp_read does not exist"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/fprobes/fp_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: fprobe event fprobes/fp_read is not enabled ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 04-fprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> new file mode 100755
> index 000000000000..b29119b81e07
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check tracepoint probe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/tracepoints/tp_sched" ]; then
> +	echo "FAIL: tracepoint probe event tracepoints/tp_sched does not exist"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/tracepoints/tp_sched/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: tracepoint probe event tracepoints/tp_sched is not enabled ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 05-tprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> new file mode 100755
> index 000000000000..a95fdddaa6a6
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> @@ -0,0 +1,23 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check instance bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/instances/foo" ]; then
> +	echo "FAIL: trace instance foo does not exist"
> +	exit 1
> +fi
> +
> +if [ ! -d "$TRACEDIR/instances/foo/events/sched/sched_switch" ]; then
> +	echo "FAIL: event sched_switch does not exist in instance foo"
> +	exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/instances/foo/events/sched/sched_switch/enable")
> +if [ "$ENABLE" != "1" ]; then
> +	echo "FAIL: event sched_switch is not enabled in instance foo ($ENABLE)"
> +	exit 1
> +fi
> +
> +echo "PASS: 06-instance"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
> index 544de0db5f58..fec41c6b290e 100644
> --- a/tools/testing/selftests/ftrace/config
> +++ b/tools/testing/selftests/ftrace/config
> @@ -1,3 +1,5 @@
> +CONFIG_BOOT_CONFIG=y
> +CONFIG_BOOTTIME_TRACING=y
>  CONFIG_BPF_SYSCALL=y
>  CONFIG_DEBUG_INFO_BTF=y
>  CONFIG_DEBUG_INFO_DWARF4=y
> @@ -8,6 +10,7 @@ CONFIG_FTRACE=y
>  CONFIG_FTRACE_SYSCALLS=y
>  CONFIG_FUNCTION_GRAPH_RETVAL=y
>  CONFIG_FUNCTION_PROFILER=y
> +CONFIG_FUNCTION_TRACER=y
>  CONFIG_HIST_TRIGGERS=y
>  CONFIG_IRQSOFF_TRACER=y
>  CONFIG_KALLSYMS_ALL=y
> @@ -24,6 +27,7 @@ CONFIG_SAMPLE_TRACE_EVENTS=m
>  CONFIG_SAMPLE_TRACE_PRINTK=m
>  CONFIG_SCHED_TRACER=y
>  CONFIG_STACK_TRACER=y
> +CONFIG_SYNTH_EVENTS=y
>  CONFIG_TRACER_SNAPSHOT=y
>  CONFIG_UPROBES=y
>  CONFIG_UPROBE_EVENTS=y
> 


-- 
Masami Hiramatsu (Google) <[email protected]>