# 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