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         help
  10           OProfile is a profiling system capable of profiling the
  11           whole system, include the kernel, kernel modules, libraries,
  12           and applications.
  13
  14           If unsure, say N.
  15
  16 config OPROFILE_IBS
  17         bool "OProfile AMD IBS support (EXPERIMENTAL)"
  18         default n
  19         depends on OPROFILE && SMP && X86
  20         help
  21           Instruction-Based Sampling (IBS) is a new profiling
  22           technique that provides rich, precise program performance
  23           information. IBS is introduced by AMD Family10h processors
  24           (AMD Opteron Quad-Core processor "Barcelona") to overcome
  25           the limitations of conventional performance counter
  26           sampling.
  27
  28           If unsure, say N.
  29
  30 config HAVE_OPROFILE
  31         bool
  32
  33 config 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
  44 config HAVE_EFFICIENT_UNALIGNED_ACCESS
  45         bool
  46         help
  47           Some architectures are unable to perform unaligned accesses
  48           without the use of get_unaligned/put_unaligned. Others are
  49           unable to perform such accesses efficiently (e.g. trap on
  50           unaligned access and require fixing it up in the exception
  51           handler.)
  52
  53           This symbol should be selected by an architecture if it can
  54           perform unaligned accesses efficiently to allow different
  55           code paths to be selected for these cases. Some network
  56           drivers, for example, could opt to not fix up alignment
  57           problems with received packets if doing so would not help
  58           much.
  59
  60           See Documentation/unaligned-memory-access.txt for more
  61           information on the topic of unaligned memory accesses.
  62
  63 config KRETPROBES
  64         def_bool y
  65         depends on KPROBES && HAVE_KRETPROBES
  66
  67 config HAVE_IOREMAP_PROT
  68         bool
  69
  70 config HAVE_KPROBES
  71         bool
  72
  73 config HAVE_KRETPROBES
  74         bool
  75
  76 #
  77 # An arch should select this if it provides all these things:
  78 #
  79 #       task_pt_regs()          in asm/processor.h or asm/ptrace.h
  80 #       arch_has_single_step()  if there is hardware single-step support
  81 #       arch_has_block_step()   if there is hardware block-step support
  82 #       asm/syscall.h           supplying asm-generic/syscall.h interface
  83 #       linux/regset.h          user_regset interfaces
  84 #       CORE_DUMP_USE_REGSET    #define'd in linux/elf.h
  85 #       TIF_SYSCALL_TRACE       calls tracehook_report_syscall_{entry,exit}
  86 #       TIF_NOTIFY_RESUME       calls tracehook_notify_resume()
  87 #       signal delivery         calls tracehook_signal_handler()
  88 #
  89 config HAVE_ARCH_TRACEHOOK
  90         bool
  91
  92 config HAVE_DMA_ATTRS
  93         bool
  94
  95 config USE_GENERIC_SMP_HELPERS
  96         bool
  97
  98 config HAVE_CLK
  99         bool
 100         help
 101           The <linux/clk.h> calls support software clock gating and
 102           thus are a key power management tool on many systems.
 103