LXR linux/arch/Kconfig

   1#
   2# General architecture dependent options
   3#
   4
   5config OPROFILE
   6        tristate "OProfile system profiling"
   7        depends on PROFILING
   8        depends on HAVE_OPROFILE
   9        select RING_BUFFER
  10        select RING_BUFFER_ALLOW_SWAP
  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
  18config 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
  30config HAVE_OPROFILE
  31        bool
  32
  33config 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
  44config OPTPROBES
  45        def_bool y
  46        depends on KPROBES && HAVE_OPTPROBES
  47        depends on !PREEMPT
  48        select KALLSYMS_ALL
  49
  50config HAVE_EFFICIENT_UNALIGNED_ACCESS
  51        bool
  52        help
  53          Some architectures are unable to perform unaligned accesses
  54          without the use of get_unaligned/put_unaligned. Others are
  55          unable to perform such accesses efficiently (e.g. trap on
  56          unaligned access and require fixing it up in the exception
  57          handler.)
  58
  59          This symbol should be selected by an architecture if it can
  60          perform unaligned accesses efficiently to allow different
  61          code paths to be selected for these cases. Some network
  62          drivers, for example, could opt to not fix up alignment
  63          problems with received packets if doing so would not help
  64          much.
  65
  66          See Documentation/unaligned-memory-access.txt for more
  67          information on the topic of unaligned memory accesses.
  68
  69config HAVE_SYSCALL_WRAPPERS
  70        bool
  71
  72config KRETPROBES
  73        def_bool y
  74        depends on KPROBES && HAVE_KRETPROBES
  75
  76config USER_RETURN_NOTIFIER
  77        bool
  78        depends on HAVE_USER_RETURN_NOTIFIER
  79        help
  80          Provide a kernel-internal notification when a cpu is about to
  81          switch to user mode.
  82
  83config HAVE_IOREMAP_PROT
  84        bool
  85
  86config HAVE_KPROBES
  87        bool
  88
  89config HAVE_KRETPROBES
  90        bool
  91
  92config HAVE_OPTPROBES
  93        bool
  94#
  95# An arch should select this if it provides all these things:
  96#
  97#       task_pt_regs()          in asm/processor.h or asm/ptrace.h
  98#       arch_has_single_step()  if there is hardware single-step support
  99#       arch_has_block_step()   if there is hardware block-step support
 100#       asm/syscall.h           supplying asm-generic/syscall.h interface
 101#       linux/regset.h          user_regset interfaces
 102#       CORE_DUMP_USE_REGSET    #define'd in linux/elf.h
 103#       TIF_SYSCALL_TRACE       calls tracehook_report_syscall_{entry,exit}
 104#       TIF_NOTIFY_RESUME       calls tracehook_notify_resume()
 105#       signal delivery         calls tracehook_signal_handler()
 106#
 107config HAVE_ARCH_TRACEHOOK
 108        bool
 109
 110config HAVE_DMA_ATTRS
 111        bool
 112
 113config USE_GENERIC_SMP_HELPERS
 114        bool
 115
 116config HAVE_REGS_AND_STACK_ACCESS_API
 117        bool
 118        help
 119          This symbol should be selected by an architecure if it supports
 120          the API needed to access registers and stack entries from pt_regs,
 121          declared in asm/ptrace.h
 122          For example the kprobes-based event tracer needs this API.
 123
 124config HAVE_CLK
 125        bool
 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
 130config HAVE_DMA_API_DEBUG
 131        bool
 132
 133config HAVE_DEFAULT_NO_SPIN_MUTEXES
 134        bool
 135
 136config HAVE_HW_BREAKPOINT
 137        bool
 138        depends on PERF_EVENTS
 139
 140config HAVE_MIXED_BREAKPOINTS_REGS
 141        bool
 142        depends on HAVE_HW_BREAKPOINT
 143        help
 144          Depending on the arch implementation of hardware breakpoints,
 145          some of them have separate registers for data and instruction
 146          breakpoints addresses, others have mixed registers to store
 147          them but define the access type in a control register.
 148          Select this option if your arch implements breakpoints under the
 149          latter fashion.
 150
 151config HAVE_USER_RETURN_NOTIFIER
 152        bool
 153
 154source "kernel/gcov/Kconfig"
 155