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gerrit-public.fairphone.software / kernel / msm-4.9 / 23637d477c1f53acbb176a02c241d60a25888fae / . / arch / Kconfig
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Mathieu Desnoyersfb32e032008-02-02 15:10:33 -0500[diff] [blame]1#
2# General architecture dependent options
3#
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]4
5config OPROFILE
Robert Richterb309a292010-02-26 15:01:23 +0100[diff] [blame]6 tristate "OProfile system profiling"
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]7 depends on PROFILING
8 depends on HAVE_OPROFILE
Ingo Molnard69d59f2008-12-12 09:38:57 +0100[diff] [blame]9 select RING_BUFFER
Christian Borntraeger9a5963e2009-09-16 21:56:49 +0200[diff] [blame]10 select RING_BUFFER_ALLOW_SWAP
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]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
Jason Yeh4d4036e2009-07-08 13:49:38 +0200[diff] [blame]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
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]30config HAVE_OPROFILE
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]31 bool
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]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
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500[diff] [blame]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
Johannes Berg58340a02008-07-25 01:45:33 -0700[diff] [blame]55config HAVE_EFFICIENT_UNALIGNED_ACCESS
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]56 bool
Johannes Berg58340a02008-07-25 01:45:33 -0700[diff] [blame]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
Heiko Carstens1a94bc32009-01-14 14:13:59 +0100[diff] [blame]74config HAVE_SYSCALL_WRAPPERS
75 bool
76
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800[diff] [blame]77config KRETPROBES
78 def_bool y
79 depends on KPROBES && HAVE_KRETPROBES
80
Avi Kivity7c68af62009-09-19 09:40:22 +0300[diff] [blame]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
Rik van Riel28b2ee22008-07-23 21:27:05 -0700[diff] [blame]88config HAVE_IOREMAP_PROT
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]89 bool
Rik van Riel28b2ee22008-07-23 21:27:05 -0700[diff] [blame]90
Mathieu Desnoyers125e5642008-02-02 15:10:36 -0500[diff] [blame]91config HAVE_KPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]92 bool
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800[diff] [blame]93
94config HAVE_KRETPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]95 bool
Arthur Kepner74bc7ce2008-04-29 01:00:30 -0700[diff] [blame]96
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500[diff] [blame]97config HAVE_OPTPROBES
98 bool
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700[diff] [blame]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
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700[diff] [blame]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
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]113 bool
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700[diff] [blame]114
Arthur Kepner74bc7ce2008-04-29 01:00:30 -0700[diff] [blame]115config HAVE_DMA_ATTRS
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]116 bool
Jens Axboe3d442232008-06-26 11:21:34 +0200[diff] [blame]117
118config USE_GENERIC_SMP_HELPERS
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]119 bool
David Brownell9483a572008-07-23 21:26:48 -0700[diff] [blame]120
Heiko Carstensf850c30c2010-02-10 17:25:17 +0100[diff] [blame]121config HAVE_REGS_AND_STACK_ACCESS_API
122 bool
Heiko Carstense01292b2010-02-18 14:25:21 +0100[diff] [blame]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.
Heiko Carstensf850c30c2010-02-10 17:25:17 +0100[diff] [blame]128
David Brownell9483a572008-07-23 21:26:48 -0700[diff] [blame]129config HAVE_CLK
Jan Beulich9ba16082008-10-15 22:01:38 -0700[diff] [blame]130 bool
David Brownell9483a572008-07-23 21:26:48 -0700[diff] [blame]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
Joerg Roedel5ee00bd2009-01-09 12:14:24 +0100[diff] [blame]135config HAVE_DMA_API_DEBUG
136 bool
Heiko Carstens36cd3c92009-04-09 18:48:34 +0200[diff] [blame]137
138config HAVE_DEFAULT_NO_SPIN_MUTEXES
139 bool
K.Prasad62a038d2009-06-01 23:43:33 +0530[diff] [blame]140
141config HAVE_HW_BREAKPOINT
142 bool
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +0100[diff] [blame]143 depends on PERF_EVENTS
K.Prasad62a038d2009-06-01 23:43:33 +0530[diff] [blame]144
Avi Kivity7c68af62009-09-19 09:40:22 +0300[diff] [blame]145config HAVE_USER_RETURN_NOTIFIER
146 bool
Ingo Molnara1922ed2009-09-07 08:19:51 +0200[diff] [blame]147
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +0200[diff] [blame]148config HAVE_PERF_EVENTS_NMI
149 bool
Frederic Weisbecker23637d42010-05-15 23:15:20 +0200[diff] [blame^]150 help
151 System hardware can generate an NMI using the perf event
152 subsystem. Also has support for calculating CPU cycle events
153 to determine how many clock cycles in a given period.
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +0200[diff] [blame]154
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700[diff] [blame]155source "kernel/gcov/Kconfig"