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