[mirror_ubuntu-artful-kernel.git] / arch / Kconfig

#
# General architecture dependent options
#

config OPROFILE
	tristate "OProfile system profiling (EXPERIMENTAL)"
	depends on PROFILING
	depends on HAVE_OPROFILE
	depends on TRACING_SUPPORT
	select TRACING
	select RING_BUFFER
	select RING_BUFFER_ALLOW_SWAP
	help
	  OProfile is a profiling system capable of profiling the
	  whole system, include the kernel, kernel modules, libraries,
	  and applications.

	  If unsure, say N.

config OPROFILE_IBS
	bool "OProfile AMD IBS support (EXPERIMENTAL)"
	default n
	depends on OPROFILE && SMP && X86
	help
          Instruction-Based Sampling (IBS) is a new profiling
          technique that provides rich, precise program performance
          information. IBS is introduced by AMD Family10h processors
          (AMD Opteron Quad-Core processor "Barcelona") to overcome
          the limitations of conventional performance counter
          sampling.

	  If unsure, say N.

config OPROFILE_EVENT_MULTIPLEX
	bool "OProfile multiplexing support (EXPERIMENTAL)"
	default n
	depends on OPROFILE && X86
	help
	  The number of hardware counters is limited. The multiplexing
	  feature enables OProfile to gather more events than counters
	  are provided by the hardware. This is realized by switching
	  between events at an user specified time interval.

	  If unsure, say N.

config HAVE_OPROFILE
	bool

config KPROBES
	bool "Kprobes"
	depends on KALLSYMS && MODULES
	depends on HAVE_KPROBES
	help
	  Kprobes allows you to trap at almost any kernel address and
	  execute a callback function.  register_kprobe() establishes
	  a probepoint and specifies the callback.  Kprobes is useful
	  for kernel debugging, non-intrusive instrumentation and testing.
	  If in doubt, say "N".

config HAVE_EFFICIENT_UNALIGNED_ACCESS
	bool
	help
	  Some architectures are unable to perform unaligned accesses
	  without the use of get_unaligned/put_unaligned. Others are
	  unable to perform such accesses efficiently (e.g. trap on
	  unaligned access and require fixing it up in the exception
	  handler.)

	  This symbol should be selected by an architecture if it can
	  perform unaligned accesses efficiently to allow different
	  code paths to be selected for these cases. Some network
	  drivers, for example, could opt to not fix up alignment
	  problems with received packets if doing so would not help
	  much.

	  See Documentation/unaligned-memory-access.txt for more
	  information on the topic of unaligned memory accesses.

config HAVE_SYSCALL_WRAPPERS
	bool

config KRETPROBES
	def_bool y
	depends on KPROBES && HAVE_KRETPROBES

config USER_RETURN_NOTIFIER
	bool
	depends on HAVE_USER_RETURN_NOTIFIER
	help
	  Provide a kernel-internal notification when a cpu is about to
	  switch to user mode.

config HAVE_IOREMAP_PROT
	bool

config HAVE_KPROBES
	bool

config HAVE_KRETPROBES
	bool

#
# An arch should select this if it provides all these things:
#
#	task_pt_regs()		in asm/processor.h or asm/ptrace.h
#	arch_has_single_step()	if there is hardware single-step support
#	arch_has_block_step()	if there is hardware block-step support
#	asm/syscall.h		supplying asm-generic/syscall.h interface
#	linux/regset.h		user_regset interfaces
#	CORE_DUMP_USE_REGSET	#define'd in linux/elf.h
#	TIF_SYSCALL_TRACE	calls tracehook_report_syscall_{entry,exit}
#	TIF_NOTIFY_RESUME	calls tracehook_notify_resume()
#	signal delivery		calls tracehook_signal_handler()
#
config HAVE_ARCH_TRACEHOOK
	bool

config HAVE_DMA_ATTRS
	bool

config USE_GENERIC_SMP_HELPERS
	bool

config HAVE_CLK
	bool
	help
	  The <linux/clk.h> calls support software clock gating and
	  thus are a key power management tool on many systems.

config HAVE_DMA_API_DEBUG
	bool

config HAVE_DEFAULT_NO_SPIN_MUTEXES
	bool

config HAVE_HW_BREAKPOINT
	bool
	depends on PERF_EVENTS

config HAVE_USER_RETURN_NOTIFIER
	bool

source "kernel/gcov/Kconfig"
Commit	Line	Data
fb32e03f MD	1	#
	2	# General architecture dependent options
	3	#
125e5645 MD	4
	5	config OPROFILE
	6	tristate "OProfile system profiling (EXPERIMENTAL)"
	7	depends on PROFILING
	8	depends on HAVE_OPROFILE
40ada30f	9	depends on TRACING_SUPPORT
d69d59f4 IM	10	select TRACING
d69d59f4 IM	11	select RING_BUFFER
9a5963eb	12	select RING_BUFFER_ALLOW_SWAP
125e5645 MD	13	help
	14	OProfile is a profiling system capable of profiling the
	15	whole system, include the kernel, kernel modules, libraries,
	16	and applications.
	17
	18	If unsure, say N.
	19
852402cc RR	20	config OPROFILE_IBS
	21	bool "OProfile AMD IBS support (EXPERIMENTAL)"
	22	default n
	23	depends on OPROFILE && SMP && X86
	24	help
	25	Instruction-Based Sampling (IBS) is a new profiling
	26	technique that provides rich, precise program performance
	27	information. IBS is introduced by AMD Family10h processors
ba8b453d	28	(AMD Opteron Quad-Core processor "Barcelona") to overcome
852402cc RR	29	the limitations of conventional performance counter
	30	sampling.
	31
	32	If unsure, say N.
	33
4d4036e0 JY	34	config OPROFILE_EVENT_MULTIPLEX
	35	bool "OProfile multiplexing support (EXPERIMENTAL)"
	36	default n
	37	depends on OPROFILE && X86
	38	help
	39	The number of hardware counters is limited. The multiplexing
	40	feature enables OProfile to gather more events than counters
	41	are provided by the hardware. This is realized by switching
	42	between events at an user specified time interval.
	43
	44	If unsure, say N.
	45
125e5645	46	config HAVE_OPROFILE
9ba16087	47	bool
125e5645 MD	48
	49	config KPROBES
	50	bool "Kprobes"
	51	depends on KALLSYMS && MODULES
	52	depends on HAVE_KPROBES
	53	help
	54	Kprobes allows you to trap at almost any kernel address and
	55	execute a callback function. register_kprobe() establishes
	56	a probepoint and specifies the callback. Kprobes is useful
	57	for kernel debugging, non-intrusive instrumentation and testing.
	58	If in doubt, say "N".
	59
58340a07	60	config HAVE_EFFICIENT_UNALIGNED_ACCESS
9ba16087	61	bool
58340a07 JB	62	help
	63	Some architectures are unable to perform unaligned accesses
	64	without the use of get_unaligned/put_unaligned. Others are
	65	unable to perform such accesses efficiently (e.g. trap on
	66	unaligned access and require fixing it up in the exception
	67	handler.)
	68
	69	This symbol should be selected by an architecture if it can
	70	perform unaligned accesses efficiently to allow different
	71	code paths to be selected for these cases. Some network
	72	drivers, for example, could opt to not fix up alignment
	73	problems with received packets if doing so would not help
	74	much.
	75
	76	See Documentation/unaligned-memory-access.txt for more
	77	information on the topic of unaligned memory accesses.
	78
1a94bc34 HC	79	config HAVE_SYSCALL_WRAPPERS
	80	bool
	81
9edddaa2 AM	82	config KRETPROBES
	83	def_bool y
	84	depends on KPROBES && HAVE_KRETPROBES
	85
7c68af6e AK	86	config USER_RETURN_NOTIFIER
	87	bool
	88	depends on HAVE_USER_RETURN_NOTIFIER
	89	help
	90	Provide a kernel-internal notification when a cpu is about to
	91	switch to user mode.
	92
28b2ee20	93	config HAVE_IOREMAP_PROT
9ba16087	94	bool
28b2ee20	95
125e5645	96	config HAVE_KPROBES
9ba16087	97	bool
9edddaa2 AM	98
9edddaa2 AM	99	config HAVE_KRETPROBES
9ba16087	100	bool
74bc7cee	101
1f5a4ad9 RM	102	#
	103	# An arch should select this if it provides all these things:
	104	#
	105	# task_pt_regs() in asm/processor.h or asm/ptrace.h
	106	# arch_has_single_step() if there is hardware single-step support
	107	# arch_has_block_step() if there is hardware block-step support
1f5a4ad9 RM	108	# asm/syscall.h supplying asm-generic/syscall.h interface
	109	# linux/regset.h user_regset interfaces
	110	# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
	111	# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
	112	# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
	113	# signal delivery calls tracehook_signal_handler()
	114	#
	115	config HAVE_ARCH_TRACEHOOK
9ba16087	116	bool
1f5a4ad9	117
74bc7cee	118	config HAVE_DMA_ATTRS
9ba16087	119	bool
3d442233 JA	120
3d442233 JA	121	config USE_GENERIC_SMP_HELPERS
9ba16087	122	bool
9483a578 DB	123
9483a578 DB	124	config HAVE_CLK
9ba16087	125	bool
9483a578 DB	126	help
	127	The <linux/clk.h> calls support software clock gating and
	128	thus are a key power management tool on many systems.
	129
5ee00bd4 JR	130	config HAVE_DMA_API_DEBUG
5ee00bd4 JR	131	bool
36cd3c9f HC	132
	133	config HAVE_DEFAULT_NO_SPIN_MUTEXES
	134	bool
62a038d3 P	135
	136	config HAVE_HW_BREAKPOINT
	137	bool
99e8c5a3	138	depends on PERF_EVENTS
62a038d3	139
7c68af6e AK	140	config HAVE_USER_RETURN_NOTIFIER
7c68af6e AK	141	bool
a1922ed6	142
2521f2c2	143	source "kernel/gcov/Kconfig"