[linux.git] / kernel / gcov / Kconfig

# SPDX-License-Identifier: GPL-2.0-only
menu "GCOV-based kernel profiling"

config GCOV_KERNEL
	bool "Enable gcov-based kernel profiling"
	depends on DEBUG_FS
	select CONSTRUCTORS if !UML
	default n
	help
	This option enables gcov-based code profiling (e.g. for code coverage
	measurements).

	If unsure, say N.

	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
	for the entire kernel. To enable profiling for specific files or
	directories, add a line similar to the following to the respective
	Makefile:

	For a single file (e.g. main.o):
	        GCOV_PROFILE_main.o := y

	For all files in one directory:
	        GCOV_PROFILE := y

	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
	is specified, use:

	        GCOV_PROFILE_main.o := n
	and:
	        GCOV_PROFILE := n

	Note that the debugfs filesystem has to be mounted to access
	profiling data.

config ARCH_HAS_GCOV_PROFILE_ALL
	def_bool n

config GCOV_PROFILE_ALL
	bool "Profile entire Kernel"
	depends on !COMPILE_TEST
	depends on GCOV_KERNEL
	depends on ARCH_HAS_GCOV_PROFILE_ALL
	default n
	help
	This options activates profiling for the entire kernel.

	If unsure, say N.

	Note that a kernel compiled with profiling flags will be significantly
	larger and run slower. Also be sure to exclude files from profiling
	which are not linked to the kernel image to prevent linker errors.

endmenu
Commit	Line	Data
ec8f24b7	1	# SPDX-License-Identifier: GPL-2.0-only
2521f2c2 PO	2	menu "GCOV-based kernel profiling"
	3
	4	config GCOV_KERNEL
	5	bool "Enable gcov-based kernel profiling"
d2c32258	6	depends on DEBUG_FS
87c9366e	7	select CONSTRUCTORS if !UML
2521f2c2	8	default n
a7f7f624	9	help
2521f2c2 PO	10	This option enables gcov-based code profiling (e.g. for code coverage
	11	measurements).
	12
	13	If unsure, say N.
	14
	15	Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
	16	for the entire kernel. To enable profiling for specific files or
	17	directories, add a line similar to the following to the respective
	18	Makefile:
	19
	20	For a single file (e.g. main.o):
	21	GCOV_PROFILE_main.o := y
	22
	23	For all files in one directory:
	24	GCOV_PROFILE := y
	25
	26	To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
	27	is specified, use:
	28
	29	GCOV_PROFILE_main.o := n
	30	and:
	31	GCOV_PROFILE := n
	32
	33	Note that the debugfs filesystem has to be mounted to access
	34	profiling data.
	35
957e3fac RV	36	config ARCH_HAS_GCOV_PROFILE_ALL
	37	def_bool n
	38
2521f2c2 PO	39	config GCOV_PROFILE_ALL
2521f2c2 PO	40	bool "Profile entire Kernel"
cc622420	41	depends on !COMPILE_TEST
2521f2c2	42	depends on GCOV_KERNEL
957e3fac	43	depends on ARCH_HAS_GCOV_PROFILE_ALL
2521f2c2	44	default n
a7f7f624	45	help
2521f2c2 PO	46	This options activates profiling for the entire kernel.
	47
	48	If unsure, say N.
	49
	50	Note that a kernel compiled with profiling flags will be significantly
	51	larger and run slower. Also be sure to exclude files from profiling
	52	which are not linked to the kernel image to prevent linker errors.
	53
	54	endmenu