LXR linux/arch/Kconfig

   1#
   2# General architecture dependent options
   3#
   4
   5config OPROFILE
   6        tristate "OProfile system profiling (EXPERIMENTAL)"
   7        depends on PROFILING
   8        depends on HAVE_OPROFILE
   9        depends on TRACING_SUPPORT
  10        select TRACING
  11        select RING_BUFFER
  12        select RING_BUFFER_ALLOW_SWAP
  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
  20config 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
  28          (AMD Opteron Quad-Core processor "Barcelona") to overcome
  29          the limitations of conventional performance counter
  30          sampling.
  31
  32          If unsure, say N.
  33
  34config 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
  46config HAVE_OPROFILE
  47        bool
  48
  49config 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
  60config HAVE_EFFICIENT_UNALIGNED_ACCESS
  61        bool
  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
  79config HAVE_SYSCALL_WRAPPERS
  80        bool
  81
  82config KRETPROBES
  83        def_bool y
  84        depends on KPROBES && HAVE_KRETPROBES
  85
  86config 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
  93config HAVE_IOREMAP_PROT
  94        bool
  95
  96config HAVE_KPROBES
  97        bool
  98
  99config HAVE_KRETPROBES
 100        bool
 101
 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
 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#
 115config HAVE_ARCH_TRACEHOOK
 116        bool
 117
 118config HAVE_DMA_ATTRS
 119        bool
 120
 121config USE_GENERIC_SMP_HELPERS
 122        bool
 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_USER_RETURN_NOTIFIER
 141        bool
 142
 143source "kernel/gcov/Kconfig"
 144