kernel-hacking: move kernel testing and coverage options to same submenu

Move error injection, coverage, testing options to a new top level
submenu 'Kernel Testing and Coverage'.  They are all for test purpose.

Link: http://lkml.kernel.org/r/20190909144453.3520-5-changbin.du@gmail.comSigned-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/Kconfig.debug

@@ -764,53 +764,6 @@ source "lib/Kconfig.kasan"
 
 endmenu # "Memory Debugging"
 
-config ARCH_HAS_KCOV
-	bool
-	help
-	  An architecture should select this when it can successfully
-	  build and run with CONFIG_KCOV. This typically requires
-	  disabling instrumentation for some early boot code.
-
-config CC_HAS_SANCOV_TRACE_PC
-	def_bool $(cc-option,-fsanitize-coverage=trace-pc)
-
-config KCOV
-	bool "Code coverage for fuzzing"
-	depends on ARCH_HAS_KCOV
-	depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
-	select DEBUG_FS
-	select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
-	help
-	  KCOV exposes kernel code coverage information in a form suitable
-	  for coverage-guided fuzzing (randomized testing).
-
-	  If RANDOMIZE_BASE is enabled, PC values will not be stable across
-	  different machines and across reboots. If you need stable PC values,
-	  disable RANDOMIZE_BASE.
-
-	  For more details, see Documentation/dev-tools/kcov.rst.
-
-config KCOV_ENABLE_COMPARISONS
-	bool "Enable comparison operands collection by KCOV"
-	depends on KCOV
-	depends on $(cc-option,-fsanitize-coverage=trace-cmp)
-	help
-	  KCOV also exposes operands of every comparison in the instrumented
-	  code along with operand sizes and PCs of the comparison instructions.
-	  These operands can be used by fuzzing engines to improve the quality
-	  of fuzzing coverage.
-
-config KCOV_INSTRUMENT_ALL
-	bool "Instrument all code by default"
-	depends on KCOV
-	default y
-	help
-	  If you are doing generic system call fuzzing (like e.g. syzkaller),
-	  then you will want to instrument the whole kernel and you should
-	  say y here. If you are doing more targeted fuzzing (like e.g.
-	  filesystem fuzzing with AFL) then you will want to enable coverage
-	  for more specific subsets of files, and should say n here.
-
 config DEBUG_SHIRQ
 	bool "Debug shared IRQ handlers"
 	depends on DEBUG_KERNEL
@@ -1480,6 +1433,54 @@ config CPU_HOTPLUG_STATE_CONTROL
 
 	  Say N if your are unsure.
 
+config LATENCYTOP
+	bool "Latency measuring infrastructure"
+	depends on DEBUG_KERNEL
+	depends on STACKTRACE_SUPPORT
+	depends on PROC_FS
+	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
+	select KALLSYMS
+	select KALLSYMS_ALL
+	select STACKTRACE
+	select SCHEDSTATS
+	select SCHED_DEBUG
+	help
+	  Enable this option if you want to use the LatencyTOP tool
+	  to find out which userspace is blocking on what kernel operations.
+
+source "kernel/trace/Kconfig"
+
+config PROVIDE_OHCI1394_DMA_INIT
+	bool "Remote debugging over FireWire early on boot"
+	depends on PCI && X86
+	help
+	  If you want to debug problems which hang or crash the kernel early
+	  on boot and the crashing machine has a FireWire port, you can use
+	  this feature to remotely access the memory of the crashed machine
+	  over FireWire. This employs remote DMA as part of the OHCI1394
+	  specification which is now the standard for FireWire controllers.
+
+	  With remote DMA, you can monitor the printk buffer remotely using
+	  firescope and access all memory below 4GB using fireproxy from gdb.
+	  Even controlling a kernel debugger is possible using remote DMA.
+
+	  Usage:
+
+	  If ohci1394_dma=early is used as boot parameter, it will initialize
+	  all OHCI1394 controllers which are found in the PCI config space.
+
+	  As all changes to the FireWire bus such as enabling and disabling
+	  devices cause a bus reset and thereby disable remote DMA for all
+	  devices, be sure to have the cable plugged and FireWire enabled on
+	  the debugging host before booting the debug target for debugging.
+
+	  This code (~1k) is freed after boot. By then, the firewire stack
+	  in charge of the OHCI-1394 controllers should be used instead.
+
+	  See Documentation/debugging-via-ohci1394.txt for more information.
+
+source "lib/kunit/Kconfig"
+
 config NOTIFIER_ERROR_INJECTION
 	tristate "Notifier error injection"
 	depends on DEBUG_KERNEL
@@ -1638,53 +1639,57 @@ config FAULT_INJECTION_STACKTRACE_FILTER
 	help
 	  Provide stacktrace filter for fault-injection capabilities
 
-config LATENCYTOP
-	bool "Latency measuring infrastructure"
-	depends on DEBUG_KERNEL
-	depends on STACKTRACE_SUPPORT
-	depends on PROC_FS
-	select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
-	select KALLSYMS
-	select KALLSYMS_ALL
-	select STACKTRACE
-	select SCHEDSTATS
-	select SCHED_DEBUG
-	help
-	  Enable this option if you want to use the LatencyTOP tool
-	  to find out which userspace is blocking on what kernel operations.
+endmenu # "Kernel Testing and Coverage"
 
-source "kernel/trace/Kconfig"
+menu "Kernel Testing and Coverage"
 
-config PROVIDE_OHCI1394_DMA_INIT
-	bool "Remote debugging over FireWire early on boot"
-	depends on PCI && X86
+config ARCH_HAS_KCOV
+	bool
 	help
-	  If you want to debug problems which hang or crash the kernel early
-	  on boot and the crashing machine has a FireWire port, you can use
-	  this feature to remotely access the memory of the crashed machine
-	  over FireWire. This employs remote DMA as part of the OHCI1394
-	  specification which is now the standard for FireWire controllers.
+	  An architecture should select this when it can successfully
+	  build and run with CONFIG_KCOV. This typically requires
+	  disabling instrumentation for some early boot code.
 
-	  With remote DMA, you can monitor the printk buffer remotely using
-	  firescope and access all memory below 4GB using fireproxy from gdb.
-	  Even controlling a kernel debugger is possible using remote DMA.
+config CC_HAS_SANCOV_TRACE_PC
+	def_bool $(cc-option,-fsanitize-coverage=trace-pc)
 
-	  Usage:
 
-	  If ohci1394_dma=early is used as boot parameter, it will initialize
-	  all OHCI1394 controllers which are found in the PCI config space.
+config KCOV
+	bool "Code coverage for fuzzing"
+	depends on ARCH_HAS_KCOV
+	depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
+	select DEBUG_FS
+	select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
+	help
+	  KCOV exposes kernel code coverage information in a form suitable
+	  for coverage-guided fuzzing (randomized testing).
 
-	  As all changes to the FireWire bus such as enabling and disabling
-	  devices cause a bus reset and thereby disable remote DMA for all
-	  devices, be sure to have the cable plugged and FireWire enabled on
-	  the debugging host before booting the debug target for debugging.
+	  If RANDOMIZE_BASE is enabled, PC values will not be stable across
+	  different machines and across reboots. If you need stable PC values,
+	  disable RANDOMIZE_BASE.
 
-	  This code (~1k) is freed after boot. By then, the firewire stack
-	  in charge of the OHCI-1394 controllers should be used instead.
+	  For more details, see Documentation/dev-tools/kcov.rst.
 
-	  See Documentation/debugging-via-ohci1394.txt for more information.
+config KCOV_ENABLE_COMPARISONS
+	bool "Enable comparison operands collection by KCOV"
+	depends on KCOV
+	depends on $(cc-option,-fsanitize-coverage=trace-cmp)
+	help
+	  KCOV also exposes operands of every comparison in the instrumented
+	  code along with operand sizes and PCs of the comparison instructions.
+	  These operands can be used by fuzzing engines to improve the quality
+	  of fuzzing coverage.
 
-source "lib/kunit/Kconfig"
+config KCOV_INSTRUMENT_ALL
+	bool "Instrument all code by default"
+	depends on KCOV
+	default y
+	help
+	  If you are doing generic system call fuzzing (like e.g. syzkaller),
+	  then you will want to instrument the whole kernel and you should
+	  say y here. If you are doing more targeted fuzzing (like e.g.
+	  filesystem fuzzing with AFL) then you will want to enable coverage
+	  for more specific subsets of files, and should say n here.
 
 menuconfig RUNTIME_TESTING_MENU
 	bool "Runtime Testing"