2 # General architecture dependent options
6 tristate "OProfile system profiling (EXPERIMENTAL)"
8 depends on HAVE_OPROFILE
9 depends on TRACING_SUPPORT
12 select RING_BUFFER_ALLOW_SWAP
14 OProfile is a profiling system capable of profiling the
15 whole system, include the kernel, kernel modules, libraries,
21 bool "OProfile AMD IBS support (EXPERIMENTAL)"
23 depends on OPROFILE && SMP && X86
25 Instruction-Based Sampling (IBS) is a new profiling
26 technique that provides rich, precise program performance
27 information. IBS is introduced by AMD Family10h processors
28 (AMD Opteron Quad-Core processor "Barcelona") to overcome
29 the limitations of conventional performance counter
34 config OPROFILE_EVENT_MULTIPLEX
35 bool "OProfile multiplexing support (EXPERIMENTAL)"
37 depends on OPROFILE && X86
39 The number of hardware counters is limited. The multiplexing
40 feature enables OProfile to gather more events than counters
41 are provided by the hardware. This is realized by switching
42 between events at an user specified time interval.
51 depends on KALLSYMS && MODULES
52 depends on HAVE_KPROBES
54 Kprobes allows you to trap at almost any kernel address and
55 execute a callback function. register_kprobe() establishes
56 a probepoint and specifies the callback. Kprobes is useful
57 for kernel debugging, non-intrusive instrumentation and testing.
60 config HAVE_EFFICIENT_UNALIGNED_ACCESS
63 Some architectures are unable to perform unaligned accesses
64 without the use of get_unaligned/put_unaligned. Others are
65 unable to perform such accesses efficiently (e.g. trap on
66 unaligned access and require fixing it up in the exception
69 This symbol should be selected by an architecture if it can
70 perform unaligned accesses efficiently to allow different
71 code paths to be selected for these cases. Some network
72 drivers, for example, could opt to not fix up alignment
73 problems with received packets if doing so would not help
76 See Documentation/unaligned-memory-access.txt for more
77 information on the topic of unaligned memory accesses.
79 config HAVE_SYSCALL_WRAPPERS
84 depends on KPROBES && HAVE_KRETPROBES
86 config HAVE_IOREMAP_PROT
92 config HAVE_KRETPROBES
96 # An arch should select this if it provides all these things:
98 # task_pt_regs() in asm/processor.h or asm/ptrace.h
99 # arch_has_single_step() if there is hardware single-step support
100 # arch_has_block_step() if there is hardware block-step support
101 # asm/syscall.h supplying asm-generic/syscall.h interface
102 # linux/regset.h user_regset interfaces
103 # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
104 # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
105 # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
106 # signal delivery calls tracehook_signal_handler()
108 config HAVE_ARCH_TRACEHOOK
111 config HAVE_DMA_ATTRS
114 config USE_GENERIC_SMP_HELPERS
120 The <linux/clk.h> calls support software clock gating and
121 thus are a key power management tool on many systems.
123 config HAVE_DMA_API_DEBUG
126 config HAVE_DEFAULT_NO_SPIN_MUTEXES
129 source "kernel/gcov/Kconfig"