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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" | |
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 | ||
afd66255 MH |
44 | config 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 | ||
58340a07 | 55 | config HAVE_EFFICIENT_UNALIGNED_ACCESS |
9ba16087 | 56 | bool |
58340a07 JB |
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 | ||
1a94bc34 HC |
74 | config HAVE_SYSCALL_WRAPPERS |
75 | bool | |
76 | ||
9edddaa2 AM |
77 | config KRETPROBES |
78 | def_bool y | |
79 | depends on KPROBES && HAVE_KRETPROBES | |
80 | ||
7c68af6e AK |
81 | config 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 | ||
28b2ee20 | 88 | config HAVE_IOREMAP_PROT |
9ba16087 | 89 | bool |
28b2ee20 | 90 | |
125e5645 | 91 | config HAVE_KPROBES |
9ba16087 | 92 | bool |
9edddaa2 AM |
93 | |
94 | config HAVE_KRETPROBES | |
9ba16087 | 95 | bool |
74bc7cee | 96 | |
afd66255 MH |
97 | config HAVE_OPTPROBES |
98 | bool | |
1f5a4ad9 RM |
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 | |
1f5a4ad9 RM |
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 | # | |
112 | config HAVE_ARCH_TRACEHOOK | |
9ba16087 | 113 | bool |
1f5a4ad9 | 114 | |
74bc7cee | 115 | config HAVE_DMA_ATTRS |
9ba16087 | 116 | bool |
3d442233 JA |
117 | |
118 | config USE_GENERIC_SMP_HELPERS | |
9ba16087 | 119 | bool |
9483a578 | 120 | |
f850c30c HC |
121 | config HAVE_REGS_AND_STACK_ACCESS_API |
122 | bool | |
e01292b1 HC |
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. | |
f850c30c | 128 | |
9483a578 | 129 | config HAVE_CLK |
9ba16087 | 130 | bool |
9483a578 DB |
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 | ||
5ee00bd4 JR |
135 | config HAVE_DMA_API_DEBUG |
136 | bool | |
36cd3c9f HC |
137 | |
138 | config HAVE_DEFAULT_NO_SPIN_MUTEXES | |
139 | bool | |
62a038d3 P |
140 | |
141 | config HAVE_HW_BREAKPOINT | |
142 | bool | |
99e8c5a3 | 143 | depends on PERF_EVENTS |
62a038d3 | 144 | |
7c68af6e AK |
145 | config HAVE_USER_RETURN_NOTIFIER |
146 | bool | |
a1922ed6 | 147 | |
c01d4323 FW |
148 | config HAVE_PERF_EVENTS_NMI |
149 | bool | |
150 | ||
2521f2c2 | 151 | source "kernel/gcov/Kconfig" |