arch/Kconfig

   1 #
   2 # General architecture dependent options
   3 #
   4
   5 config OPROFILE
   6         tristate "OProfile system profiling"
   7         depends on PROFILING
   8         depends on HAVE_OPROFILE
   9         select RING_BUFFER
  10         select RING_BUFFER_ALLOW_SWAP
  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_EVENT_MULTIPLEX
  19         bool "OProfile multiplexing support (EXPERIMENTAL)"
  20         default n
  21         depends on OPROFILE && X86
  22         help
  23           The number of hardware counters is limited. The multiplexing
  24           feature enables OProfile to gather more events than counters
  25           are provided by the hardware. This is realized by switching
  26           between events at an user specified time interval.
  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 HAVE_SYSCALL_WRAPPERS
  64         bool
  65
  66 config KRETPROBES
  67         def_bool y
  68         depends on KPROBES && HAVE_KRETPROBES
  69
  70 config USER_RETURN_NOTIFIER
  71         bool
  72         depends on HAVE_USER_RETURN_NOTIFIER
  73         help
  74           Provide a kernel-internal notification when a cpu is about to
  75           switch to user mode.
  76
  77 config HAVE_IOREMAP_PROT
  78         bool
  79
  80 config HAVE_KPROBES
  81         bool
  82
  83 config HAVE_KRETPROBES
  84         bool
  85
  86 #
  87 # An arch should select this if it provides all these things:
  88 #
  89 #       task_pt_regs()          in asm/processor.h or asm/ptrace.h
  90 #       arch_has_single_step()  if there is hardware single-step support
  91 #       arch_has_block_step()   if there is hardware block-step support
  92 #       asm/syscall.h           supplying asm-generic/syscall.h interface
  93 #       linux/regset.h          user_regset interfaces
  94 #       CORE_DUMP_USE_REGSET    #define'd in linux/elf.h
  95 #       TIF_SYSCALL_TRACE       calls tracehook_report_syscall_{entry,exit}
  96 #       TIF_NOTIFY_RESUME       calls tracehook_notify_resume()
  97 #       signal delivery         calls tracehook_signal_handler()
  98 #
  99 config HAVE_ARCH_TRACEHOOK
 100         bool
 101
 102 config HAVE_DMA_ATTRS
 103         bool
 104
 105 config USE_GENERIC_SMP_HELPERS
 106         bool
 107
 108 config HAVE_REGS_AND_STACK_ACCESS_API
 109         bool
 110         help
 111           This symbol should be selected by an architecure if it supports
 112           the API needed to access registers and stack entries from pt_regs,
 113           declared in asm/ptrace.h
 114           For example the kprobes-based event tracer needs this API.
 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 config HAVE_HW_BREAKPOINT
 129         bool
 130         depends on PERF_EVENTS
 131
 132 config HAVE_USER_RETURN_NOTIFIER
 133         bool
 134
 135 source "kernel/gcov/Kconfig"