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Commit | Line | Data |
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fb32e03f MD |
1 | # |
2 | # General architecture dependent options | |
3 | # | |
125e5645 MD |
4 | |
5 | config OPROFILE | |
b309a294 | 6 | tristate "OProfile system profiling" |
125e5645 MD |
7 | depends on PROFILING |
8 | depends on HAVE_OPROFILE | |
d69d59f4 | 9 | select RING_BUFFER |
9a5963eb | 10 | select RING_BUFFER_ALLOW_SWAP |
125e5645 MD |
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 | ||
4d4036e0 JY |
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 | ||
125e5645 | 30 | config HAVE_OPROFILE |
9ba16087 | 31 | bool |
125e5645 MD |
32 | |
33 | config KPROBES | |
34 | bool "Kprobes" | |
05ed160e | 35 | depends on MODULES |
125e5645 | 36 | depends on HAVE_KPROBES |
05ed160e | 37 | select KALLSYMS |
125e5645 MD |
38 | help |
39 | Kprobes allows you to trap at almost any kernel address and | |
40 | execute a callback function. register_kprobe() establishes | |
41 | a probepoint and specifies the callback. Kprobes is useful | |
42 | for kernel debugging, non-intrusive instrumentation and testing. | |
43 | If in doubt, say "N". | |
44 | ||
afd66255 | 45 | config OPTPROBES |
5cc718b9 MH |
46 | def_bool y |
47 | depends on KPROBES && HAVE_OPTPROBES | |
afd66255 | 48 | depends on !PREEMPT |
afd66255 | 49 | |
58340a07 | 50 | config HAVE_EFFICIENT_UNALIGNED_ACCESS |
9ba16087 | 51 | bool |
58340a07 JB |
52 | help |
53 | Some architectures are unable to perform unaligned accesses | |
54 | without the use of get_unaligned/put_unaligned. Others are | |
55 | unable to perform such accesses efficiently (e.g. trap on | |
56 | unaligned access and require fixing it up in the exception | |
57 | handler.) | |
58 | ||
59 | This symbol should be selected by an architecture if it can | |
60 | perform unaligned accesses efficiently to allow different | |
61 | code paths to be selected for these cases. Some network | |
62 | drivers, for example, could opt to not fix up alignment | |
63 | problems with received packets if doing so would not help | |
64 | much. | |
65 | ||
66 | See Documentation/unaligned-memory-access.txt for more | |
67 | information on the topic of unaligned memory accesses. | |
68 | ||
1a94bc34 HC |
69 | config HAVE_SYSCALL_WRAPPERS |
70 | bool | |
71 | ||
9edddaa2 AM |
72 | config KRETPROBES |
73 | def_bool y | |
74 | depends on KPROBES && HAVE_KRETPROBES | |
75 | ||
7c68af6e AK |
76 | config USER_RETURN_NOTIFIER |
77 | bool | |
78 | depends on HAVE_USER_RETURN_NOTIFIER | |
79 | help | |
80 | Provide a kernel-internal notification when a cpu is about to | |
81 | switch to user mode. | |
82 | ||
28b2ee20 | 83 | config HAVE_IOREMAP_PROT |
9ba16087 | 84 | bool |
28b2ee20 | 85 | |
125e5645 | 86 | config HAVE_KPROBES |
9ba16087 | 87 | bool |
9edddaa2 AM |
88 | |
89 | config HAVE_KRETPROBES | |
9ba16087 | 90 | bool |
74bc7cee | 91 | |
afd66255 MH |
92 | config HAVE_OPTPROBES |
93 | bool | |
1f5a4ad9 RM |
94 | # |
95 | # An arch should select this if it provides all these things: | |
96 | # | |
97 | # task_pt_regs() in asm/processor.h or asm/ptrace.h | |
98 | # arch_has_single_step() if there is hardware single-step support | |
99 | # arch_has_block_step() if there is hardware block-step support | |
1f5a4ad9 RM |
100 | # asm/syscall.h supplying asm-generic/syscall.h interface |
101 | # linux/regset.h user_regset interfaces | |
102 | # CORE_DUMP_USE_REGSET #define'd in linux/elf.h | |
103 | # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit} | |
104 | # TIF_NOTIFY_RESUME calls tracehook_notify_resume() | |
105 | # signal delivery calls tracehook_signal_handler() | |
106 | # | |
107 | config HAVE_ARCH_TRACEHOOK | |
9ba16087 | 108 | bool |
1f5a4ad9 | 109 | |
74bc7cee | 110 | config HAVE_DMA_ATTRS |
9ba16087 | 111 | bool |
3d442233 JA |
112 | |
113 | config USE_GENERIC_SMP_HELPERS | |
9ba16087 | 114 | bool |
9483a578 | 115 | |
f850c30c HC |
116 | config HAVE_REGS_AND_STACK_ACCESS_API |
117 | bool | |
e01292b1 HC |
118 | help |
119 | This symbol should be selected by an architecure if it supports | |
120 | the API needed to access registers and stack entries from pt_regs, | |
121 | declared in asm/ptrace.h | |
122 | For example the kprobes-based event tracer needs this API. | |
f850c30c | 123 | |
9483a578 | 124 | config HAVE_CLK |
9ba16087 | 125 | bool |
9483a578 DB |
126 | help |
127 | The <linux/clk.h> calls support software clock gating and | |
128 | thus are a key power management tool on many systems. | |
129 | ||
5ee00bd4 JR |
130 | config HAVE_DMA_API_DEBUG |
131 | bool | |
36cd3c9f HC |
132 | |
133 | config HAVE_DEFAULT_NO_SPIN_MUTEXES | |
134 | bool | |
62a038d3 P |
135 | |
136 | config HAVE_HW_BREAKPOINT | |
137 | bool | |
99e8c5a3 | 138 | depends on PERF_EVENTS |
62a038d3 | 139 | |
0102752e FW |
140 | config HAVE_MIXED_BREAKPOINTS_REGS |
141 | bool | |
142 | depends on HAVE_HW_BREAKPOINT | |
143 | help | |
144 | Depending on the arch implementation of hardware breakpoints, | |
145 | some of them have separate registers for data and instruction | |
146 | breakpoints addresses, others have mixed registers to store | |
147 | them but define the access type in a control register. | |
148 | Select this option if your arch implements breakpoints under the | |
149 | latter fashion. | |
150 | ||
7c68af6e AK |
151 | config HAVE_USER_RETURN_NOTIFIER |
152 | bool | |
a1922ed6 | 153 | |
c01d4323 FW |
154 | config HAVE_PERF_EVENTS_NMI |
155 | bool | |
23637d47 FW |
156 | help |
157 | System hardware can generate an NMI using the perf event | |
158 | subsystem. Also has support for calculating CPU cycle events | |
159 | to determine how many clock cycles in a given period. | |
c01d4323 | 160 | |
2521f2c2 | 161 | source "kernel/gcov/Kconfig" |