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         help
  13           OProfile is a profiling system capable of profiling the
  14           whole system, include the kernel, kernel modules, libraries,
  15           and applications.
  16
  17           If unsure, say N.
  18
  19 config OPROFILE_IBS
  20         bool "OProfile AMD IBS support (EXPERIMENTAL)"
  21         default n
  22         depends on OPROFILE && SMP && X86
  23         help
  24           Instruction-Based Sampling (IBS) is a new profiling
  25           technique that provides rich, precise program performance
  26           information. IBS is introduced by AMD Family10h processors
  27           (AMD Opteron Quad-Core processor "Barcelona") to overcome
  28           the limitations of conventional performance counter
  29           sampling.
  30
  31           If unsure, say N.
  32
  33 config OPROFILE_EVENT_MULTIPLEX
  34         bool "OProfile multiplexing support (EXPERIMENTAL)"
  35         default n
  36         depends on OPROFILE && X86
  37         help
  38           The number of hardware counters is limited. The multiplexing
  39           feature enables OProfile to gather more events than counters
  40           are provided by the hardware. This is realized by switching
  41           between events at an user specified time interval.
  42
  43           If unsure, say N.
  44
  45 config HAVE_OPROFILE
  46         bool
  47
  48 config KPROBES
  49         bool "Kprobes"
  50         depends on KALLSYMS && MODULES
  51         depends on HAVE_KPROBES
  52         help
  53           Kprobes allows you to trap at almost any kernel address and
  54           execute a callback function.  register_kprobe() establishes
  55           a probepoint and specifies the callback.  Kprobes is useful
  56           for kernel debugging, non-intrusive instrumentation and testing.
  57           If in doubt, say "N".
  58
  59 config HAVE_EFFICIENT_UNALIGNED_ACCESS
  60         bool
  61         help
  62           Some architectures are unable to perform unaligned accesses
  63           without the use of get_unaligned/put_unaligned. Others are
  64           unable to perform such accesses efficiently (e.g. trap on
  65           unaligned access and require fixing it up in the exception
  66           handler.)
  67
  68           This symbol should be selected by an architecture if it can
  69           perform unaligned accesses efficiently to allow different
  70           code paths to be selected for these cases. Some network
  71           drivers, for example, could opt to not fix up alignment
  72           problems with received packets if doing so would not help
  73           much.
  74
  75           See Documentation/unaligned-memory-access.txt for more
  76           information on the topic of unaligned memory accesses.
  77
  78 config HAVE_SYSCALL_WRAPPERS
  79         bool
  80
  81 config KRETPROBES
  82         def_bool y
  83         depends on KPROBES && HAVE_KRETPROBES
  84
  85 config HAVE_IOREMAP_PROT
  86         bool
  87
  88 config HAVE_KPROBES
  89         bool
  90
  91 config HAVE_KRETPROBES
  92         bool
  93
  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 #
 107 config HAVE_ARCH_TRACEHOOK
 108         bool
 109
 110 config HAVE_DMA_ATTRS
 111         bool
 112
 113 config USE_GENERIC_SMP_HELPERS
 114         bool
 115
 116 config HAVE_CLK
 117         bool
 118         help
 119           The <linux/clk.h> calls support software clock gating and
 120           thus are a key power management tool on many systems.
 121
 122 config HAVE_DMA_API_DEBUG
 123         bool
 124
 125 config HAVE_DEFAULT_NO_SPIN_MUTEXES
 126         bool
 127
 128 source "kernel/gcov/Kconfig"