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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
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
Robert Richter852402c2008-07-22 21:09:06 +020016config OPROFILE_IBS
17 bool "OProfile AMD IBS support (EXPERIMENTAL)"
18 default n
19 depends on OPROFILE && SMP && X86
20 help
21 Instruction-Based Sampling (IBS) is a new profiling
22 technique that provides rich, precise program performance
23 information. IBS is introduced by AMD Family10h processors
Jesper Dangaard Brouerba8b4532008-10-24 15:05:12 +020024 (AMD Opteron Quad-Core processor "Barcelona") to overcome
Robert Richter852402c2008-07-22 21:09:06 +020025 the limitations of conventional performance counter
26 sampling.
27
28 If unsure, say N.
29
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050030config HAVE_OPROFILE
Jan Beulich9ba16082008-10-15 22:01:38 -070031 bool
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050032
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
Johannes Berg58340a02008-07-25 01:45:33 -070044config HAVE_EFFICIENT_UNALIGNED_ACCESS
Jan Beulich9ba16082008-10-15 22:01:38 -070045 bool
Johannes Berg58340a02008-07-25 01:45:33 -070046 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
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080063config KRETPROBES
64 def_bool y
65 depends on KPROBES && HAVE_KRETPROBES
66
Rik van Riel28b2ee22008-07-23 21:27:05 -070067config HAVE_IOREMAP_PROT
Jan Beulich9ba16082008-10-15 22:01:38 -070068 bool
Rik van Riel28b2ee22008-07-23 21:27:05 -070069
Mathieu Desnoyers125e5642008-02-02 15:10:36 -050070config HAVE_KPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -070071 bool
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080072
73config HAVE_KRETPROBES
Jan Beulich9ba16082008-10-15 22:01:38 -070074 bool
Arthur Kepner74bc7ce2008-04-29 01:00:30 -070075
Roland McGrath1f5a4ad2008-07-25 19:45:57 -070076#
77# An arch should select this if it provides all these things:
78#
79# task_pt_regs() in asm/processor.h or asm/ptrace.h
80# arch_has_single_step() if there is hardware single-step support
81# arch_has_block_step() if there is hardware block-step support
Roland McGrath1f5a4ad2008-07-25 19:45:57 -070082# asm/syscall.h supplying asm-generic/syscall.h interface
83# linux/regset.h user_regset interfaces
84# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
85# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
86# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
87# signal delivery calls tracehook_signal_handler()
88#
89config HAVE_ARCH_TRACEHOOK
Jan Beulich9ba16082008-10-15 22:01:38 -070090 bool
Roland McGrath1f5a4ad2008-07-25 19:45:57 -070091
Arthur Kepner74bc7ce2008-04-29 01:00:30 -070092config HAVE_DMA_ATTRS
Jan Beulich9ba16082008-10-15 22:01:38 -070093 bool
Jens Axboe3d442232008-06-26 11:21:34 +020094
95config USE_GENERIC_SMP_HELPERS
Jan Beulich9ba16082008-10-15 22:01:38 -070096 bool
David Brownell9483a572008-07-23 21:26:48 -070097
98config HAVE_CLK
Jan Beulich9ba16082008-10-15 22:01:38 -070099 bool
David Brownell9483a572008-07-23 21:26:48 -0700100 help
101 The <linux/clk.h> calls support software clock gating and
102 thus are a key power management tool on many systems.
103