[PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework

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* [PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework
@ 2026-08-07 21:44 Masami Hiramatsu (Google)
  2026-08-07 21:44 ` [PATCH v3 1/2] tracing/boot: Add support for eprobe, fprobe, and tprobe events Masami Hiramatsu (Google)
  2026-08-07 21:44 ` [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework Masami Hiramatsu (Google)
  0 siblings, 2 replies; 4+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-07 21:44 UTC (permalink / raw)
  To: Steven Rostedt, Masami Hiramatsu, Jonathan Corbet, Shuah Khan
  Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel, linux-doc,
	linux-kselftest

Hi,

This is the 3rd version of series to extend kernel boot-time tracing to
support newly added dynamic event types (eprobes, fprobes, and tracepoint
probes) and introduces an automated QEMU-based test suite under
tools/testing/selftests/ftrace/boottime/.
The previous version is here:

 https://lore.kernel.org/all/178602969872.141946.3932041319962687996.stgit@devnote2/

Changes in v3:
 - tracing/boot: Check return values of strscpy() and snprintf() in
   trace_boot_add_probe_event() to prevent silent buffer truncation.
 - selftests/ftrace: 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.
 - selftests/ftrace: Support executing run_boottime_test.sh both in-tree
   and in installed kselftest environment.
 - selftests/ftrace: Add HUP, INT, and TERM signal handlers to tempdir
   cleanup trap.
 - selftests/ftrace: Validate workdir creation and update
   run_single_test() to return 0 on test failure so set -e is not
   suspended by invocation in an AND-OR list.

Changes in v2:
 - Fix raw command detection logic for eprobes, fprobes, and tprobes
   by requiring ':' or isspace() after type prefix.
 - Consolidate duplicate loop logic into trace_boot_add_probe_event()
   helper function.
 - 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.

Thanks,

---
base-commit: 54f133c6178d06b169dceae18cc92c4945933b8c

Masami Hiramatsu (Google) (2):
      tracing/boot: Add support for eprobe, fprobe, and tprobe events
      selftests/ftrace: Add boot-time tracing test framework


 Documentation/trace/boottime-trace.rst             |   18 +
 kernel/trace/trace_boot.c                          |   97 +++++++
 kernel/trace/trace_dynevent.c                      |    5 
 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 
 20 files changed, 600 insertions(+), 4 deletions(-)
 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

--
Masami Hiramatsu (Google) <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH v3 1/2] tracing/boot: Add support for eprobe, fprobe, and tprobe events
  2026-08-07 21:44 [PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework Masami Hiramatsu (Google)
@ 2026-08-07 21:44 ` Masami Hiramatsu (Google)
  2026-08-07 21:44 ` [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework Masami Hiramatsu (Google)
  1 sibling, 0 replies; 4+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-07 21:44 UTC (permalink / raw)
  To: Steven Rostedt, Masami Hiramatsu, Jonathan Corbet, Shuah Khan
  Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel, linux-doc,
	linux-kselftest

From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Boot-time tracing currently supports kprobe-events and synthetic-events
under per-event configuration options.

Extend boot-time tracing to support newly added dynamic probe types:
- event probes (eprobe) under the "eprobes" event group
- function probes (fprobe) under the "fprobes" event group
- tracepoint probes (tprobe) under the "tracepoints" or "tprobes"
  event group

To support this cleanly, update dyn_event_create() in trace_dynevent.c
so that passing NULL as the type parameter delegates to
create_dyn_event(), allowing generic creation of any registered
dynamic event type from a raw command string.

Update Documentation/trace/boottime-trace.rst accordingly to describe
the new per-event bootconfig options.

Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Changes in v3:
 - Check return values of strscpy() and snprintf() in trace_boot_add_probe_event()
   to prevent silent buffer truncation when constructing probe event strings.

Changes in v2:
 - Fix raw command detection logic for eprobes, fprobes, and tprobes
   by requiring ':' or isspace() after type prefix.
 - Consolidate duplicate loop logic into trace_boot_add_probe_event()
   helper function.
---
 Documentation/trace/boottime-trace.rst |   18 +++++-
 kernel/trace/trace_boot.c              |   97 ++++++++++++++++++++++++++++++++
 kernel/trace/trace_dynevent.c          |    5 ++
 3 files changed, 117 insertions(+), 3 deletions(-)

diff --git a/Documentation/trace/boottime-trace.rst b/Documentation/trace/boottime-trace.rst
index 651f3a2c01de..2c3c1fedb92c 100644
--- a/Documentation/trace/boottime-trace.rst
+++ b/Documentation/trace/boottime-trace.rst
@@ -121,9 +121,21 @@ ftrace.[instance.INSTANCE.]event.synthetic.EVENT.fields = FIELD[, FIELD2[...]]
    Defines new synthetic event with FIELDs. Each field should be
    "type varname".
 
-Note that kprobe and synthetic event definitions can be written under
-instance node, but those are also visible from other instances. So please
-take care for event name conflict.
+ftrace.[instance.INSTANCE.]event.eprobes.EVENT.probes = PROBE[, PROBE2[...]]
+   Defines new event probe based on PROBEs. This option is available only
+   for the event which group name is "eprobes".
+
+ftrace.[instance.INSTANCE.]event.fprobes.EVENT.probes = PROBE[, PROBE2[...]]
+   Defines new fprobe event based on PROBEs. This option is available only
+   for the event which group name is "fprobes".
+
+ftrace.[instance.INSTANCE.]event.tracepoints.EVENT.probes = PROBE[, PROBE2[...]]
+   Defines new tracepoint probe based on PROBEs. This option is available only
+   for the event which group name is "tracepoints" or "tprobes".
+
+Note that dynamic event definitions can be written under instance node, but
+those are also visible from other instances. So please take care for event
+name conflict.
 
 Ftrace Histogram Options
 ------------------------
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 2ca2541c8a58..5da0a8bbb110 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -18,6 +18,7 @@
 #include <linux/trace_events.h>
 
 #include "trace.h"
+#include "trace_dynevent.h"
 
 #define MAX_BUF_LEN 256
 
@@ -172,6 +173,93 @@ trace_boot_add_synth_event(struct xbc_node *node, const char *event)
 }
 #endif
 
+#if defined(CONFIG_EPROBE_EVENTS) || defined(CONFIG_FPROBE_EVENTS)
+static int __init
+trace_boot_add_probe_event(struct xbc_node *node, const char *group,
+			    const char *event, char type, const char *type_name)
+{
+	struct xbc_node *anode;
+	char buf[MAX_BUF_LEN];
+	const char *val;
+	int ret = 0;
+
+	xbc_node_for_each_array_value(node, "probes", anode, val) {
+		if (val[0] == type && (val[1] == ':' || isspace(val[1]))) {
+			ret = strscpy(buf, val, MAX_BUF_LEN);
+			if (ret < 0) {
+				pr_err("%s command is too long: %s\n", type_name, val);
+				break;
+			}
+		} else {
+			ret = snprintf(buf, MAX_BUF_LEN, "%c:%s/%s %s", type, group, event, val);
+			if (ret >= MAX_BUF_LEN || ret < 0) {
+				pr_err("%s command is too long: %c:%s/%s %s\n",
+				       type_name, type, group, event, val);
+				ret = -E2BIG;
+				break;
+			}
+		}
+
+		ret = dyn_event_create(buf, NULL);
+		if (ret) {
+			pr_err("Failed to add %s: %s\n", type_name, buf);
+			break;
+		}
+	}
+
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_EPROBE_EVENTS
+static inline int __init
+trace_boot_add_eprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	return trace_boot_add_probe_event(node, group, event, 'e', "eprobe");
+}
+#else
+static inline int __init
+trace_boot_add_eprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	pr_err("Event probe is not supported.\n");
+	return -EOPNOTSUPP;
+}
+#endif
+
+#ifdef CONFIG_FPROBE_EVENTS
+static inline int __init
+trace_boot_add_fprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	return trace_boot_add_probe_event(node, group, event, 'f', "fprobe");
+}
+
+static inline int __init
+trace_boot_add_tprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	return trace_boot_add_probe_event(node, group, event, 't', "tprobe");
+}
+#else
+static inline int __init
+trace_boot_add_fprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	pr_err("Fprobe event is not supported.\n");
+	return -EOPNOTSUPP;
+}
+
+static inline int __init
+trace_boot_add_tprobe_event(struct xbc_node *node, const char *group,
+			    const char *event)
+{
+	pr_err("Tracepoint probe is not supported.\n");
+	return -EOPNOTSUPP;
+}
+#endif
+
 #ifdef CONFIG_HIST_TRIGGERS
 static int __init __printf(3, 4)
 append_printf(char **bufp, char *end, const char *fmt, ...)
@@ -477,6 +565,15 @@ trace_boot_init_one_event(struct trace_array *tr, struct xbc_node *gnode,
 	if (!strcmp(group, "synthetic"))
 		if (trace_boot_add_synth_event(enode, event) < 0)
 			return;
+	if (!strcmp(group, "eprobes"))
+		if (trace_boot_add_eprobe_event(enode, group, event) < 0)
+			return;
+	if (!strcmp(group, "fprobes"))
+		if (trace_boot_add_fprobe_event(enode, group, event) < 0)
+			return;
+	if (!strcmp(group, "tracepoints") || !strcmp(group, "tprobes"))
+		if (trace_boot_add_tprobe_event(enode, group, event) < 0)
+			return;
 
 	mutex_lock(&event_mutex);
 	file = find_event_file(tr, group, event);
diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c
index c4dfbc293bae..6f2e39b797e5 100644
--- a/kernel/trace/trace_dynevent.c
+++ b/kernel/trace/trace_dynevent.c
@@ -116,6 +116,8 @@ int dyn_event_release(const char *raw_command, struct dyn_event_operations *type
 	return ret;
 }
 
+static int create_dyn_event(const char *raw_command);
+
 /*
  * Locked version of event creation. The event creation must be protected by
  * dyn_event_ops_mutex because of protecting trace_probe_log.
@@ -124,6 +126,9 @@ int dyn_event_create(const char *raw_command, struct dyn_event_operations *type)
 {
 	int ret;
 
+	if (!type)
+		return create_dyn_event(raw_command);
+
 	mutex_lock(&dyn_event_ops_mutex);
 	ret = type->create(raw_command);
 	mutex_unlock(&dyn_event_ops_mutex);


^ permalink raw reply related	[flat|nested] 4+ messages in thread

* [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework
  2026-08-07 21:44 [PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework Masami Hiramatsu (Google)
  2026-08-07 21:44 ` [PATCH v3 1/2] tracing/boot: Add support for eprobe, fprobe, and tprobe events Masami Hiramatsu (Google)
@ 2026-08-07 21:44 ` Masami Hiramatsu (Google)
  2026-08-08 12:19   ` Masami Hiramatsu
  1 sibling, 1 reply; 4+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-07 21:44 UTC (permalink / raw)
  To: Steven Rostedt, Masami Hiramatsu, Jonathan Corbet, Shuah Khan
  Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel, linux-doc,
	linux-kselftest

From: Masami Hiramatsu (Google) <mhiramat@kernel.org>

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.

Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

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


^ permalink raw reply related	[flat|nested] 4+ messages in thread

* Re: [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework
  2026-08-07 21:44 ` [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework Masami Hiramatsu (Google)
@ 2026-08-08 12:19   ` Masami Hiramatsu
  0 siblings, 0 replies; 4+ messages in thread
From: Masami Hiramatsu @ 2026-08-08 12:19 UTC (permalink / raw)
  To: Masami Hiramatsu (Google)
  Cc: Steven Rostedt, Jonathan Corbet, Shuah Khan, Mathieu Desnoyers,
	linux-kernel, linux-trace-kernel, linux-doc, linux-kselftest

On Sat,  8 Aug 2026 06:44:21 +0900
"Masami Hiramatsu (Google)" <mhiramat@kernel.org> wrote:

> From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
> 
> 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) <mhiramat@kernel.org>
> 
> 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) <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2026-08-08 12:20 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-08-07 21:44 [PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework Masami Hiramatsu (Google)
2026-08-07 21:44 ` [PATCH v3 1/2] tracing/boot: Add support for eprobe, fprobe, and tprobe events Masami Hiramatsu (Google)
2026-08-07 21:44 ` [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework Masami Hiramatsu (Google)
2026-08-08 12:19   ` Masami Hiramatsu

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