Root/arch/Kconfig

1#
2# General architecture dependent options
3#
4
5config 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
18config 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
30config HAVE_OPROFILE
31    bool
32
33config 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
44config OPTPROBES
45    bool "Kprobes jump optimization support (EXPERIMENTAL)"
46    default y
47    depends on KPROBES
48    depends on !PREEMPT
49    depends on HAVE_OPTPROBES
50    select KALLSYMS_ALL
51    help
52      This option will allow kprobes to optimize breakpoint to
53      a jump for reducing its overhead.
54
55config HAVE_EFFICIENT_UNALIGNED_ACCESS
56    bool
57    help
58      Some architectures are unable to perform unaligned accesses
59      without the use of get_unaligned/put_unaligned. Others are
60      unable to perform such accesses efficiently (e.g. trap on
61      unaligned access and require fixing it up in the exception
62      handler.)
63
64      This symbol should be selected by an architecture if it can
65      perform unaligned accesses efficiently to allow different
66      code paths to be selected for these cases. Some network
67      drivers, for example, could opt to not fix up alignment
68      problems with received packets if doing so would not help
69      much.
70
71      See Documentation/unaligned-memory-access.txt for more
72      information on the topic of unaligned memory accesses.
73
74config HAVE_SYSCALL_WRAPPERS
75    bool
76
77config KRETPROBES
78    def_bool y
79    depends on KPROBES && HAVE_KRETPROBES
80
81config USER_RETURN_NOTIFIER
82    bool
83    depends on HAVE_USER_RETURN_NOTIFIER
84    help
85      Provide a kernel-internal notification when a cpu is about to
86      switch to user mode.
87
88config HAVE_IOREMAP_PROT
89    bool
90
91config HAVE_KPROBES
92    bool
93
94config HAVE_KRETPROBES
95    bool
96
97config HAVE_OPTPROBES
98    bool
99#
100# An arch should select this if it provides all these things:
101#
102# task_pt_regs() in asm/processor.h or asm/ptrace.h
103# arch_has_single_step() if there is hardware single-step support
104# arch_has_block_step() if there is hardware block-step support
105# asm/syscall.h supplying asm-generic/syscall.h interface
106# linux/regset.h user_regset interfaces
107# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
108# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
109# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
110# signal delivery calls tracehook_signal_handler()
111#
112config HAVE_ARCH_TRACEHOOK
113    bool
114
115config HAVE_DMA_ATTRS
116    bool
117
118config USE_GENERIC_SMP_HELPERS
119    bool
120
121config HAVE_REGS_AND_STACK_ACCESS_API
122    bool
123    help
124      This symbol should be selected by an architecure if it supports
125      the API needed to access registers and stack entries from pt_regs,
126      declared in asm/ptrace.h
127      For example the kprobes-based event tracer needs this API.
128
129config HAVE_CLK
130    bool
131    help
132      The <linux/clk.h> calls support software clock gating and
133      thus are a key power management tool on many systems.
134
135config HAVE_DMA_API_DEBUG
136    bool
137
138config HAVE_DEFAULT_NO_SPIN_MUTEXES
139    bool
140
141config HAVE_HW_BREAKPOINT
142    bool
143    depends on PERF_EVENTS
144
145config HAVE_USER_RETURN_NOTIFIER
146    bool
147
148source "kernel/gcov/Kconfig"
149

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