# SPDX-License-Identifier: GPL-2.0-onlymenu "GCOV-based kernel profiling" config GCOV_KERNEL	bool "Enable gcov-based kernel profiling"	depends on DEBUG_FS	depends on !ARCH_WANTS_NO_INSTR || CC_HAS_NO_PROFILE_FN_ATTR	select CONSTRUCTORS	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