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Mathieu Desnoyersfb32e032008-02-02 15:10:33 -05001#
2# General architecture dependent options
3#
Mathieu Desnoyers125e5642008-02-02 15:10:36 -05004
5config OPROFILE
6 tristate "OProfile system profiling (EXPERIMENTAL)"
7 depends on PROFILING
8 depends on HAVE_OPROFILE
Ingo Molnar40ada302009-03-05 21:19:55 +01009 depends on TRACING_SUPPORT
Ingo Molnard69d59f2008-12-12 09:38:57 +010010 select TRACING
11 select RING_BUFFER
Christian Borntraeger9a5963e2009-09-16 21:56:49 +020012 select RING_BUFFER_ALLOW_SWAP
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050013 help
14 OProfile is a profiling system capable of profiling the
15 whole system, include the kernel, kernel modules, libraries,
16 and applications.
17
18 If unsure, say N.
19
Robert Richter852402c2008-07-22 21:09:06 +020020config OPROFILE_IBS
21 bool "OProfile AMD IBS support (EXPERIMENTAL)"
22 default n
23 depends on OPROFILE && SMP && X86
24 help
25 Instruction-Based Sampling (IBS) is a new profiling
26 technique that provides rich, precise program performance
27 information. IBS is introduced by AMD Family10h processors
Jesper Dangaard Brouerba8b4532008-10-24 15:05:12 +020028 (AMD Opteron Quad-Core processor "Barcelona") to overcome
Robert Richter852402c2008-07-22 21:09:06 +020029 the limitations of conventional performance counter
30 sampling.
31
32 If unsure, say N.
33
Jason Yeh4d4036e2009-07-08 13:49:38 +020034config OPROFILE_EVENT_MULTIPLEX
35 bool "OProfile multiplexing support (EXPERIMENTAL)"
36 default n
37 depends on OPROFILE && X86
38 help
39 The number of hardware counters is limited. The multiplexing
40 feature enables OProfile to gather more events than counters
41 are provided by the hardware. This is realized by switching
42 between events at an user specified time interval.
43
44 If unsure, say N.
45
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050046config HAVE_OPROFILE
Jan Beulich9ba16082008-10-15 22:01:38 -070047 bool
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050048
49config KPROBES
50 bool "Kprobes"
51 depends on KALLSYMS && MODULES
52 depends on HAVE_KPROBES
53 help
54 Kprobes allows you to trap at almost any kernel address and
55 execute a callback function. register_kprobe() establishes
56 a probepoint and specifies the callback. Kprobes is useful
57 for kernel debugging, non-intrusive instrumentation and testing.
58 If in doubt, say "N".
59
Johannes Berg58340a02008-07-25 01:45:33 -070060config HAVE_EFFICIENT_UNALIGNED_ACCESS
Jan Beulich9ba16082008-10-15 22:01:38 -070061 bool
Johannes Berg58340a02008-07-25 01:45:33 -070062 help
63 Some architectures are unable to perform unaligned accesses
64 without the use of get_unaligned/put_unaligned. Others are
65 unable to perform such accesses efficiently (e.g. trap on
66 unaligned access and require fixing it up in the exception
67 handler.)
68
69 This symbol should be selected by an architecture if it can
70 perform unaligned accesses efficiently to allow different
71 code paths to be selected for these cases. Some network
72 drivers, for example, could opt to not fix up alignment
73 problems with received packets if doing so would not help
74 much.
75
76 See Documentation/unaligned-memory-access.txt for more
77 information on the topic of unaligned memory accesses.
78
Heiko Carstens1a94bc32009-01-14 14:13:59 +010079config HAVE_SYSCALL_WRAPPERS
80 bool
81
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080082config KRETPROBES
83 def_bool y
84 depends on KPROBES && HAVE_KRETPROBES
85
Avi Kivity7c68af62009-09-19 09:40:22 +030086config USER_RETURN_NOTIFIER
87 bool
88 depends on HAVE_USER_RETURN_NOTIFIER
89 help
90 Provide a kernel-internal notification when a cpu is about to
91 switch to user mode.
92
Rik van Riel28b2ee22008-07-23 21:27:05 -070093config HAVE_IOREMAP_PROT
Jan Beulich9ba16082008-10-15 22:01:38 -070094 bool
Rik van Riel28b2ee22008-07-23 21:27:05 -070095
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050096config HAVE_KPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -070097 bool
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080098
99config HAVE_KRETPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -0700100 bool
Arthur Kepner74bc7ce2008-04-29 01:00:30 -0700101
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700102#
103# An arch should select this if it provides all these things:
104#
105# task_pt_regs() in asm/processor.h or asm/ptrace.h
106# arch_has_single_step() if there is hardware single-step support
107# arch_has_block_step() if there is hardware block-step support
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700108# asm/syscall.h supplying asm-generic/syscall.h interface
109# linux/regset.h user_regset interfaces
110# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
111# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
112# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
113# signal delivery calls tracehook_signal_handler()
114#
115config HAVE_ARCH_TRACEHOOK
Jan Beulich9ba16082008-10-15 22:01:38 -0700116 bool
Roland McGrath1f5a4ad2008-07-25 19:45:57 -0700117
Arthur Kepner74bc7ce2008-04-29 01:00:30 -0700118config HAVE_DMA_ATTRS
Jan Beulich9ba16082008-10-15 22:01:38 -0700119 bool
Jens Axboe3d442232008-06-26 11:21:34 +0200120
121config USE_GENERIC_SMP_HELPERS
Jan Beulich9ba16082008-10-15 22:01:38 -0700122 bool
David Brownell9483a572008-07-23 21:26:48 -0700123
124config HAVE_CLK
Jan Beulich9ba16082008-10-15 22:01:38 -0700125 bool
David Brownell9483a572008-07-23 21:26:48 -0700126 help
127 The <linux/clk.h> calls support software clock gating and
128 thus are a key power management tool on many systems.
129
Joerg Roedel5ee00bd2009-01-09 12:14:24 +0100130config HAVE_DMA_API_DEBUG
131 bool
Heiko Carstens36cd3c92009-04-09 18:48:34 +0200132
133config HAVE_DEFAULT_NO_SPIN_MUTEXES
134 bool
K.Prasad62a038d2009-06-01 23:43:33 +0530135
136config HAVE_HW_BREAKPOINT
137 bool
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +0200138 depends on HAVE_PERF_EVENTS
139 select ANON_INODES
140 select PERF_EVENTS
K.Prasad62a038d2009-06-01 23:43:33 +0530141
Avi Kivity7c68af62009-09-19 09:40:22 +0300142config HAVE_USER_RETURN_NOTIFIER
143 bool
Ingo Molnara1922ed2009-09-07 08:19:51 +0200144
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700145source "kernel/gcov/Kconfig"