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arch/Kconfig 4.27 KB
fb32e03fd   Mathieu Desnoyers   Create arch/Kconfig
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  #
  # General architecture dependent options
  #
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  config OPROFILE
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  	tristate "OProfile system profiling"
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  	depends on PROFILING
  	depends on HAVE_OPROFILE
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  	select RING_BUFFER
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  	select RING_BUFFER_ALLOW_SWAP
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  	help
  	  OProfile is a profiling system capable of profiling the
  	  whole system, include the kernel, kernel modules, libraries,
  	  and applications.
  
  	  If unsure, say N.
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  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.
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  config HAVE_OPROFILE
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  	bool
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  config KPROBES
  	bool "Kprobes"
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  	depends on MODULES
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  	depends on HAVE_KPROBES
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  	select KALLSYMS
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  	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".
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  config OPTPROBES
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  	def_bool y
  	depends on KPROBES && HAVE_OPTPROBES
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  	depends on !PREEMPT
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  config HAVE_EFFICIENT_UNALIGNED_ACCESS
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  	bool
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  	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.
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  config HAVE_SYSCALL_WRAPPERS
  	bool
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  config KRETPROBES
  	def_bool y
  	depends on KPROBES && HAVE_KRETPROBES
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  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.
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  config HAVE_IOREMAP_PROT
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  	bool
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  config HAVE_KPROBES
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  	bool
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  config HAVE_KRETPROBES
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  	bool
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  config HAVE_OPTPROBES
  	bool
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  #
  # 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
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  #	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
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  	bool
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  config HAVE_DMA_ATTRS
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  	bool
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  config USE_GENERIC_SMP_HELPERS
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  	bool
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  config HAVE_REGS_AND_STACK_ACCESS_API
  	bool
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  	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.
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  config HAVE_CLK
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  	bool
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  	help
  	  The <linux/clk.h> calls support software clock gating and
  	  thus are a key power management tool on many systems.
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  config HAVE_DMA_API_DEBUG
  	bool
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  config HAVE_DEFAULT_NO_SPIN_MUTEXES
  	bool
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  config HAVE_HW_BREAKPOINT
  	bool
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  	depends on PERF_EVENTS
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  config HAVE_MIXED_BREAKPOINTS_REGS
  	bool
  	depends on HAVE_HW_BREAKPOINT
  	help
  	  Depending on the arch implementation of hardware breakpoints,
  	  some of them have separate registers for data and instruction
  	  breakpoints addresses, others have mixed registers to store
  	  them but define the access type in a control register.
  	  Select this option if your arch implements breakpoints under the
  	  latter fashion.
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  config HAVE_USER_RETURN_NOTIFIER
  	bool
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  config HAVE_PERF_EVENTS_NMI
  	bool
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  	help
  	  System hardware can generate an NMI using the perf event
  	  subsystem.  Also has support for calculating CPU cycle events
  	  to determine how many clock cycles in a given period.
c01d43233   Frederic Weisbecker   lockup_detector: ...
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  config HAVE_ARCH_JUMP_LABEL
  	bool
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  source "kernel/gcov/Kconfig"