[net-next-2.6.git] / arch / Kconfig

#
# General architecture dependent options
#

config OPROFILE
	tristate "OProfile system profiling"
	depends on PROFILING
	depends on HAVE_OPROFILE
	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_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 OPTPROBES
	bool "Kprobes jump optimization support (EXPERIMENTAL)"
	default y
	depends on KPROBES
	depends on !PREEMPT
	depends on HAVE_OPTPROBES
	select KALLSYMS_ALL
	help
	  This option will allow kprobes to optimize breakpoint to
	  a jump for reducing its overhead.

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

config HAVE_OPTPROBES
	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_REGS_AND_STACK_ACCESS_API
	bool
	help
	  This symbol should be selected by an architecure if it supports
	  the API needed to access registers and stack entries from pt_regs,
	  declared in asm/ptrace.h
	  For example the kprobes-based event tracer needs this API.

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
125e5645 MD	5	config OPROFILE
b309a294	6	tristate "OProfile system profiling"
125e5645 MD	7	depends on PROFILING
125e5645 MD	8	depends on HAVE_OPROFILE
d69d59f4	9	select RING_BUFFER
9a5963eb	10	select RING_BUFFER_ALLOW_SWAP
125e5645 MD	11	help
	12	OProfile is a profiling system capable of profiling the
	13	whole system, include the kernel, kernel modules, libraries,
	14	and applications.
	15
	16	If unsure, say N.
	17
4d4036e0 JY	18	config OPROFILE_EVENT_MULTIPLEX
	19	bool "OProfile multiplexing support (EXPERIMENTAL)"
	20	default n
	21	depends on OPROFILE && X86
	22	help
	23	The number of hardware counters is limited. The multiplexing
	24	feature enables OProfile to gather more events than counters
	25	are provided by the hardware. This is realized by switching
	26	between events at an user specified time interval.
	27
	28	If unsure, say N.
	29
125e5645	30	config HAVE_OPROFILE
9ba16087	31	bool
125e5645 MD	32
	33	config KPROBES
	34	bool "Kprobes"
	35	depends on KALLSYMS && MODULES
	36	depends on HAVE_KPROBES
	37	help
	38	Kprobes allows you to trap at almost any kernel address and
	39	execute a callback function. register_kprobe() establishes
	40	a probepoint and specifies the callback. Kprobes is useful
	41	for kernel debugging, non-intrusive instrumentation and testing.
	42	If in doubt, say "N".
	43
afd66255 MH	44	config OPTPROBES
	45	bool "Kprobes jump optimization support (EXPERIMENTAL)"
	46	default y
	47	depends on KPROBES
	48	depends on !PREEMPT
	49	depends on HAVE_OPTPROBES
	50	select KALLSYMS_ALL
	51	help
	52	This option will allow kprobes to optimize breakpoint to
	53	a jump for reducing its overhead.
	54
58340a07	55	config HAVE_EFFICIENT_UNALIGNED_ACCESS
9ba16087	56	bool
58340a07 JB	57	help
	58	Some architectures are unable to perform unaligned accesses
	59	without the use of get_unaligned/put_unaligned. Others are
	60	unable to perform such accesses efficiently (e.g. trap on
	61	unaligned access and require fixing it up in the exception
	62	handler.)
	63
	64	This symbol should be selected by an architecture if it can
	65	perform unaligned accesses efficiently to allow different
	66	code paths to be selected for these cases. Some network
	67	drivers, for example, could opt to not fix up alignment
	68	problems with received packets if doing so would not help
	69	much.
	70
	71	See Documentation/unaligned-memory-access.txt for more
	72	information on the topic of unaligned memory accesses.
	73
1a94bc34 HC	74	config HAVE_SYSCALL_WRAPPERS
	75	bool
	76
9edddaa2 AM	77	config KRETPROBES
	78	def_bool y
	79	depends on KPROBES && HAVE_KRETPROBES
	80
7c68af6e AK	81	config USER_RETURN_NOTIFIER
	82	bool
	83	depends on HAVE_USER_RETURN_NOTIFIER
	84	help
	85	Provide a kernel-internal notification when a cpu is about to
	86	switch to user mode.
	87
28b2ee20	88	config HAVE_IOREMAP_PROT
9ba16087	89	bool
28b2ee20	90
125e5645	91	config HAVE_KPROBES
9ba16087	92	bool
9edddaa2 AM	93
9edddaa2 AM	94	config HAVE_KRETPROBES
9ba16087	95	bool
74bc7cee	96
afd66255 MH	97	config HAVE_OPTPROBES
afd66255 MH	98	bool
1f5a4ad9 RM	99	#
	100	# An arch should select this if it provides all these things:
	101	#
	102	# task_pt_regs() in asm/processor.h or asm/ptrace.h
	103	# arch_has_single_step() if there is hardware single-step support
	104	# arch_has_block_step() if there is hardware block-step support
1f5a4ad9 RM	105	# asm/syscall.h supplying asm-generic/syscall.h interface
	106	# linux/regset.h user_regset interfaces
	107	# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
	108	# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
	109	# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
	110	# signal delivery calls tracehook_signal_handler()
	111	#
	112	config HAVE_ARCH_TRACEHOOK
9ba16087	113	bool
1f5a4ad9	114
74bc7cee	115	config HAVE_DMA_ATTRS
9ba16087	116	bool
3d442233 JA	117
3d442233 JA	118	config USE_GENERIC_SMP_HELPERS
9ba16087	119	bool
9483a578	120
f850c30c HC	121	config HAVE_REGS_AND_STACK_ACCESS_API
f850c30c HC	122	bool
e01292b1 HC	123	help
	124	This symbol should be selected by an architecure if it supports
	125	the API needed to access registers and stack entries from pt_regs,
	126	declared in asm/ptrace.h
	127	For example the kprobes-based event tracer needs this API.
f850c30c	128
9483a578	129	config HAVE_CLK
9ba16087	130	bool
9483a578 DB	131	help
	132	The <linux/clk.h> calls support software clock gating and
	133	thus are a key power management tool on many systems.
	134
5ee00bd4 JR	135	config HAVE_DMA_API_DEBUG
5ee00bd4 JR	136	bool
36cd3c9f HC	137
	138	config HAVE_DEFAULT_NO_SPIN_MUTEXES
	139	bool
62a038d3 P	140
	141	config HAVE_HW_BREAKPOINT
	142	bool
99e8c5a3	143	depends on PERF_EVENTS
62a038d3	144
7c68af6e AK	145	config HAVE_USER_RETURN_NOTIFIER
7c68af6e AK	146	bool
a1922ed6	147
2521f2c2	148	source "kernel/gcov/Kconfig"