2 # General architecture dependent options
6 tristate "OProfile system profiling"
8 depends on HAVE_OPROFILE
10 select RING_BUFFER_ALLOW_SWAP
12 OProfile is a profiling system capable of profiling the
13 whole system, include the kernel, kernel modules, libraries,
18 config OPROFILE_EVENT_MULTIPLEX
19 bool "OProfile multiplexing support (EXPERIMENTAL)"
21 depends on OPROFILE && X86
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.
35 depends on KALLSYMS && MODULES
36 depends on HAVE_KPROBES
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.
44 config HAVE_EFFICIENT_UNALIGNED_ACCESS
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
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
60 See Documentation/unaligned-memory-access.txt for more
61 information on the topic of unaligned memory accesses.
63 config HAVE_SYSCALL_WRAPPERS
68 depends on KPROBES && HAVE_KRETPROBES
70 config USER_RETURN_NOTIFIER
72 depends on HAVE_USER_RETURN_NOTIFIER
74 Provide a kernel-internal notification when a cpu is about to
77 config HAVE_IOREMAP_PROT
83 config HAVE_KRETPROBES
87 # An arch should select this if it provides all these things:
89 # task_pt_regs() in asm/processor.h or asm/ptrace.h
90 # arch_has_single_step() if there is hardware single-step support
91 # arch_has_block_step() if there is hardware block-step support
92 # asm/syscall.h supplying asm-generic/syscall.h interface
93 # linux/regset.h user_regset interfaces
94 # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
95 # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
96 # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
97 # signal delivery calls tracehook_signal_handler()
99 config HAVE_ARCH_TRACEHOOK
102 config HAVE_DMA_ATTRS
105 config USE_GENERIC_SMP_HELPERS
108 config HAVE_REGS_AND_STACK_ACCESS_API
111 This symbol should be selected by an architecure if it supports
112 the API needed to access registers and stack entries from pt_regs,
113 declared in asm/ptrace.h
114 For example the kprobes-based event tracer needs this API.
119 The <linux/clk.h> calls support software clock gating and
120 thus are a key power management tool on many systems.
122 config HAVE_DMA_API_DEBUG
125 config HAVE_DEFAULT_NO_SPIN_MUTEXES
128 config HAVE_HW_BREAKPOINT
130 depends on PERF_EVENTS
132 config HAVE_USER_RETURN_NOTIFIER
135 source "kernel/gcov/Kconfig"