2 # General architecture dependent options
6 tristate "OProfile system profiling (EXPERIMENTAL)"
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,
19 bool "OProfile AMD IBS support (EXPERIMENTAL)"
21 depends on OPROFILE && SMP && X86
23 Instruction-Based Sampling (IBS) is a new profiling
24 technique that provides rich, precise program performance
25 information. IBS is introduced by AMD Family10h processors
26 (AMD Opteron Quad-Core processor "Barcelona") to overcome
27 the limitations of conventional performance counter
32 config OPROFILE_EVENT_MULTIPLEX
33 bool "OProfile multiplexing support (EXPERIMENTAL)"
35 depends on OPROFILE && X86
37 The number of hardware counters is limited. The multiplexing
38 feature enables OProfile to gather more events than counters
39 are provided by the hardware. This is realized by switching
40 between events at an user specified time interval.
49 depends on KALLSYMS && MODULES
50 depends on HAVE_KPROBES
52 Kprobes allows you to trap at almost any kernel address and
53 execute a callback function. register_kprobe() establishes
54 a probepoint and specifies the callback. Kprobes is useful
55 for kernel debugging, non-intrusive instrumentation and testing.
58 config HAVE_EFFICIENT_UNALIGNED_ACCESS
61 Some architectures are unable to perform unaligned accesses
62 without the use of get_unaligned/put_unaligned. Others are
63 unable to perform such accesses efficiently (e.g. trap on
64 unaligned access and require fixing it up in the exception
67 This symbol should be selected by an architecture if it can
68 perform unaligned accesses efficiently to allow different
69 code paths to be selected for these cases. Some network
70 drivers, for example, could opt to not fix up alignment
71 problems with received packets if doing so would not help
74 See Documentation/unaligned-memory-access.txt for more
75 information on the topic of unaligned memory accesses.
77 config HAVE_SYSCALL_WRAPPERS
82 depends on KPROBES && HAVE_KRETPROBES
84 config USER_RETURN_NOTIFIER
86 depends on HAVE_USER_RETURN_NOTIFIER
88 Provide a kernel-internal notification when a cpu is about to
91 config HAVE_IOREMAP_PROT
97 config HAVE_KRETPROBES
101 # An arch should select this if it provides all these things:
103 # task_pt_regs() in asm/processor.h or asm/ptrace.h
104 # arch_has_single_step() if there is hardware single-step support
105 # arch_has_block_step() if there is hardware block-step support
106 # asm/syscall.h supplying asm-generic/syscall.h interface
107 # linux/regset.h user_regset interfaces
108 # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
109 # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
110 # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
111 # signal delivery calls tracehook_signal_handler()
113 config HAVE_ARCH_TRACEHOOK
116 config HAVE_DMA_ATTRS
119 config USE_GENERIC_SMP_HELPERS
125 The <linux/clk.h> calls support software clock gating and
126 thus are a key power management tool on many systems.
128 config HAVE_DMA_API_DEBUG
131 config HAVE_DEFAULT_NO_SPIN_MUTEXES
134 config HAVE_HW_BREAKPOINT
136 depends on PERF_EVENTS
138 config HAVE_USER_RETURN_NOTIFIER
141 source "kernel/gcov/Kconfig"