1 # SPDX-License-Identifier: GPL-2.0-only
2 menu "GCOV-based kernel profiling"
3
4 config GCOV_KERNEL
5 bool "Enable gcov-based kernel profili
6 depends on DEBUG_FS
7 depends on !ARCH_WANTS_NO_INSTR || CC_
8 select CONSTRUCTORS
9 default n
10 help
11 This option enables gcov-based code pr
12 measurements).
13
14 If unsure, say N.
15
16 Additionally specify CONFIG_GCOV_PROFI
17 for the entire kernel. To enable profi
18 directories, add a line similar to the
19 Makefile:
20
21 For a single file (e.g. main.o):
22 GCOV_PROFILE_main.o := y
23
24 For all files in one directory:
25 GCOV_PROFILE := y
26
27 To exclude files from being profiled e
28 is specified, use:
29
30 GCOV_PROFILE_main.o := n
31 and:
32 GCOV_PROFILE := n
33
34 Note that the debugfs filesystem has t
35 profiling data.
36
37 config ARCH_HAS_GCOV_PROFILE_ALL
38 def_bool n
39
40 config GCOV_PROFILE_ALL
41 bool "Profile entire Kernel"
42 depends on !COMPILE_TEST
43 depends on GCOV_KERNEL
44 depends on ARCH_HAS_GCOV_PROFILE_ALL
45 default n
46 help
47 This options activates profiling for t
48
49 If unsure, say N.
50
51 Note that a kernel compiled with profi
52 larger and run slower. Also be sure to
53 which are not linked to the kernel ima
54
55 endmenu
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