[linux-2.6-block.git] / arch / Kconfig

#
# General architecture dependent options
#

config OPROFILE
	tristate "OProfile system profiling (EXPERIMENTAL)"
	depends on PROFILING
	depends on HAVE_OPROFILE
	select TRACING
	select RING_BUFFER
	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 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 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.
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
d69d59f4 IM	9	select TRACING
d69d59f4 IM	10	select RING_BUFFER
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
852402cc RR	18	config OPROFILE_IBS
	19	bool "OProfile AMD IBS support (EXPERIMENTAL)"
	20	default n
	21	depends on OPROFILE && SMP && X86
	22	help
	23	Instruction-Based Sampling (IBS) is a new profiling
	24	technique that provides rich, precise program performance
	25	information. IBS is introduced by AMD Family10h processors
ba8b453d	26	(AMD Opteron Quad-Core processor "Barcelona") to overcome
852402cc RR	27	the limitations of conventional performance counter
	28	sampling.
	29
	30	If unsure, say N.
	31
125e5645	32	config HAVE_OPROFILE
9ba16087	33	bool
125e5645 MD	34
	35	config KPROBES
	36	bool "Kprobes"
	37	depends on KALLSYMS && MODULES
	38	depends on HAVE_KPROBES
	39	help
	40	Kprobes allows you to trap at almost any kernel address and
	41	execute a callback function. register_kprobe() establishes
	42	a probepoint and specifies the callback. Kprobes is useful
	43	for kernel debugging, non-intrusive instrumentation and testing.
	44	If in doubt, say "N".
	45
58340a07	46	config HAVE_EFFICIENT_UNALIGNED_ACCESS
9ba16087	47	bool
58340a07 JB	48	help
	49	Some architectures are unable to perform unaligned accesses
	50	without the use of get_unaligned/put_unaligned. Others are
	51	unable to perform such accesses efficiently (e.g. trap on
	52	unaligned access and require fixing it up in the exception
	53	handler.)
	54
	55	This symbol should be selected by an architecture if it can
	56	perform unaligned accesses efficiently to allow different
	57	code paths to be selected for these cases. Some network
	58	drivers, for example, could opt to not fix up alignment
	59	problems with received packets if doing so would not help
	60	much.
	61
	62	See Documentation/unaligned-memory-access.txt for more
	63	information on the topic of unaligned memory accesses.
	64
1a94bc34 HC	65	config HAVE_SYSCALL_WRAPPERS
	66	bool
	67
9edddaa2 AM	68	config KRETPROBES
	69	def_bool y
	70	depends on KPROBES && HAVE_KRETPROBES
	71
28b2ee20	72	config HAVE_IOREMAP_PROT
9ba16087	73	bool
28b2ee20	74
125e5645	75	config HAVE_KPROBES
9ba16087	76	bool
9edddaa2 AM	77
9edddaa2 AM	78	config HAVE_KRETPROBES
9ba16087	79	bool
74bc7cee	80
1f5a4ad9 RM	81	#
	82	# An arch should select this if it provides all these things:
	83	#
	84	# task_pt_regs() in asm/processor.h or asm/ptrace.h
	85	# arch_has_single_step() if there is hardware single-step support
	86	# arch_has_block_step() if there is hardware block-step support
1f5a4ad9 RM	87	# asm/syscall.h supplying asm-generic/syscall.h interface
	88	# linux/regset.h user_regset interfaces
	89	# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
	90	# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
	91	# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
	92	# signal delivery calls tracehook_signal_handler()
	93	#
	94	config HAVE_ARCH_TRACEHOOK
9ba16087	95	bool
1f5a4ad9	96
74bc7cee	97	config HAVE_DMA_ATTRS
9ba16087	98	bool
3d442233 JA	99
3d442233 JA	100	config USE_GENERIC_SMP_HELPERS
9ba16087	101	bool
9483a578 DB	102
9483a578 DB	103	config HAVE_CLK
9ba16087	104	bool
9483a578 DB	105	help
	106	The <linux/clk.h> calls support software clock gating and
	107	thus are a key power management tool on many systems.
	108