2 # General architecture dependent options
6 tristate "OProfile system profiling (EXPERIMENTAL)"
8 depends on HAVE_OPROFILE
9 depends on TRACING_SUPPORT
13 OProfile is a profiling system capable of profiling the
14 whole system, include the kernel, kernel modules, libraries,
20 bool "OProfile AMD IBS support (EXPERIMENTAL)"
22 depends on OPROFILE && SMP && X86
24 Instruction-Based Sampling (IBS) is a new profiling
25 technique that provides rich, precise program performance
26 information. IBS is introduced by AMD Family10h processors
27 (AMD Opteron Quad-Core processor "Barcelona") to overcome
28 the limitations of conventional performance counter
33 config OPROFILE_EVENT_MULTIPLEX
34 bool "OProfile multiplexing support (EXPERIMENTAL)"
36 depends on OPROFILE && X86
38 The number of hardware counters is limited. The multiplexing
39 feature enables OProfile to gather more events than counters
40 are provided by the hardware. This is realized by switching
41 between events at an user specified time interval.
50 depends on KALLSYMS && MODULES
51 depends on HAVE_KPROBES
53 Kprobes allows you to trap at almost any kernel address and
54 execute a callback function. register_kprobe() establishes
55 a probepoint and specifies the callback. Kprobes is useful
56 for kernel debugging, non-intrusive instrumentation and testing.
59 config HAVE_EFFICIENT_UNALIGNED_ACCESS
62 Some architectures are unable to perform unaligned accesses
63 without the use of get_unaligned/put_unaligned. Others are
64 unable to perform such accesses efficiently (e.g. trap on
65 unaligned access and require fixing it up in the exception
68 This symbol should be selected by an architecture if it can
69 perform unaligned accesses efficiently to allow different
70 code paths to be selected for these cases. Some network
71 drivers, for example, could opt to not fix up alignment
72 problems with received packets if doing so would not help
75 See Documentation/unaligned-memory-access.txt for more
76 information on the topic of unaligned memory accesses.
78 config HAVE_SYSCALL_WRAPPERS
83 depends on KPROBES && HAVE_KRETPROBES
85 config HAVE_IOREMAP_PROT
91 config HAVE_KRETPROBES
95 # An arch should select this if it provides all these things:
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
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()
107 config HAVE_ARCH_TRACEHOOK
110 config HAVE_DMA_ATTRS
113 config USE_GENERIC_SMP_HELPERS
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 source "kernel/gcov/Kconfig"