Merge tag 'for-linus-6.2-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / kernel / gcov / Kconfig
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ec8f24b7 1# SPDX-License-Identifier: GPL-2.0-only
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2menu "GCOV-based kernel profiling"
3
4config GCOV_KERNEL
5 bool "Enable gcov-based kernel profiling"
d2c32258 6 depends on DEBUG_FS
51c2ee6d 7 depends on !ARCH_WANTS_NO_INSTR || CC_HAS_NO_PROFILE_FN_ATTR
55b6f763 8 select CONSTRUCTORS
2521f2c2 9 default n
a7f7f624 10 help
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11 This option enables gcov-based code profiling (e.g. for code coverage
12 measurements).
13
14 If unsure, say N.
15
16 Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
17 for the entire kernel. To enable profiling for specific files or
18 directories, add a line similar to the following to the respective
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 even when CONFIG_GCOV_PROFILE_ALL
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 to be mounted to access
35 profiling data.
36
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37config ARCH_HAS_GCOV_PROFILE_ALL
38 def_bool n
39
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40config GCOV_PROFILE_ALL
41 bool "Profile entire Kernel"
cc622420 42 depends on !COMPILE_TEST
2521f2c2 43 depends on GCOV_KERNEL
957e3fac 44 depends on ARCH_HAS_GCOV_PROFILE_ALL
2521f2c2 45 default n
a7f7f624 46 help
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47 This options activates profiling for the entire kernel.
48
49 If unsure, say N.
50
51 Note that a kernel compiled with profiling flags will be significantly
52 larger and run slower. Also be sure to exclude files from profiling
53 which are not linked to the kernel image to prevent linker errors.
54
55endmenu