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         select TRACING
  10         select RING_BUFFER
  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
  18 config OPROFILE_IBS
  19         bool "OProfile AMD IBS support (EXPERIMENTAL)"
  20         default n
  21         depends on OPROFILE && SMP && X86
  22         help
  23           Instruction-Based Sampling (IBS) is a new profiling
  24           technique that provides rich, precise program performance
  25           information. IBS is introduced by AMD Family10h processors
  26           (AMD Opteron Quad-Core processor "Barcelona") to overcome
  27           the limitations of conventional performance counter
  28           sampling.
  29
  30           If unsure, say N.
  31
  32 config HAVE_OPROFILE
  33         bool
  34
  35 config KPROBES
  36         bool "Kprobes"
  37         depends on KALLSYMS && MODULES
  38         depends on HAVE_KPROBES
  39         help
  40           Kprobes allows you to trap at almost any kernel address and
  41           execute a callback function.  register_kprobe() establishes
  42           a probepoint and specifies the callback.  Kprobes is useful
  43           for kernel debugging, non-intrusive instrumentation and testing.
  44           If in doubt, say "N".
  45
  46 config HAVE_EFFICIENT_UNALIGNED_ACCESS
  47         bool
  48         help
  49           Some architectures are unable to perform unaligned accesses
  50           without the use of get_unaligned/put_unaligned. Others are
  51           unable to perform such accesses efficiently (e.g. trap on
  52           unaligned access and require fixing it up in the exception
  53           handler.)
  54
  55           This symbol should be selected by an architecture if it can
  56           perform unaligned accesses efficiently to allow different
  57           code paths to be selected for these cases. Some network
  58           drivers, for example, could opt to not fix up alignment
  59           problems with received packets if doing so would not help
  60           much.
  61
  62           See Documentation/unaligned-memory-access.txt for more
  63           information on the topic of unaligned memory accesses.
  64
  65 config KRETPROBES
  66         def_bool y
  67         depends on KPROBES && HAVE_KRETPROBES
  68
  69 config HAVE_IOREMAP_PROT
  70         bool
  71
  72 config HAVE_KPROBES
  73         bool
  74
  75 config HAVE_KRETPROBES
  76         bool
  77
  78 #
  79 # An arch should select this if it provides all these things:
  80 #
  81 #       task_pt_regs()          in asm/processor.h or asm/ptrace.h
  82 #       arch_has_single_step()  if there is hardware single-step support
  83 #       arch_has_block_step()   if there is hardware block-step support
  84 #       asm/syscall.h           supplying asm-generic/syscall.h interface
  85 #       linux/regset.h          user_regset interfaces
  86 #       CORE_DUMP_USE_REGSET    #define'd in linux/elf.h
  87 #       TIF_SYSCALL_TRACE       calls tracehook_report_syscall_{entry,exit}
  88 #       TIF_NOTIFY_RESUME       calls tracehook_notify_resume()
  89 #       signal delivery         calls tracehook_signal_handler()
  90 #
  91 config HAVE_ARCH_TRACEHOOK
  92         bool
  93
  94 config HAVE_DMA_ATTRS
  95         bool
  96
  97 config USE_GENERIC_SMP_HELPERS
  98         bool
  99
 100 config HAVE_CLK
 101         bool
 102         help
 103           The <linux/clk.h> calls support software clock gating and
 104           thus are a key power management tool on many systems.
 105