arch/Kconfig

   1 #
   2 # General architecture dependent options
   3 #
   4
   5 config 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
  20 config 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
  34 config 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
  46 config HAVE_OPROFILE
  47         bool
  48
  49 config 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
  60 config 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
  79 config HAVE_SYSCALL_WRAPPERS
  80         bool
  81
  82 config KRETPROBES
  83         def_bool y
  84         depends on KPROBES && HAVE_KRETPROBES
  85
  86 config 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
  93 config HAVE_IOREMAP_PROT
  94         bool
  95
  96 config HAVE_KPROBES
  97         bool
  98
  99 config 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 #
 115 config HAVE_ARCH_TRACEHOOK
 116         bool
 117
 118 config HAVE_DMA_ATTRS
 119         bool
 120
 121 config USE_GENERIC_SMP_HELPERS
 122         bool
 123
 124 config 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
 130 config HAVE_DMA_API_DEBUG
 131         bool
 132
 133 config HAVE_DEFAULT_NO_SPIN_MUTEXES
 134         bool
 135
 136 config HAVE_HW_BREAKPOINT
 137         bool
 138         depends on PERF_EVENTS
 139
 140 config HAVE_USER_RETURN_NOTIFIER
 141         bool
 142
 143 source "kernel/gcov/Kconfig"