1# 2# General architecture dependent options 3# 4 5config OPROFILE 6 tristate "OProfile system profiling (EXPERIMENTAL)" 7 depends on PROFILING 8 depends on HAVE_OPROFILE 9 depends on TRACING_SUPPORT 10 select TRACING 11 select RING_BUFFER 12 help 13 OProfile is a profiling system capable of profiling the 14 whole system, include the kernel, kernel modules, libraries, 15 and applications. 16 17 If unsure, say N. 18 19config OPROFILE_IBS 20 bool "OProfile AMD IBS support (EXPERIMENTAL)" 21 default n 22 depends on OPROFILE && SMP && X86 23 help 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 29 sampling. 30 31 If unsure, say N. 32 33config OPROFILE_EVENT_MULTIPLEX 34 bool "OProfile multiplexing support (EXPERIMENTAL)" 35 default n 36 depends on OPROFILE && X86 37 help 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. 42 43 If unsure, say N. 44 45config HAVE_OPROFILE 46 bool 47 48config KPROBES 49 bool "Kprobes" 50 depends on KALLSYMS && MODULES 51 depends on HAVE_KPROBES 52 help 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. 57 If in doubt, say "N". 58 59config HAVE_EFFICIENT_UNALIGNED_ACCESS 60 bool 61 help 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 66 handler.) 67 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 73 much. 74 75 See Documentation/unaligned-memory-access.txt for more 76 information on the topic of unaligned memory accesses. 77 78config HAVE_SYSCALL_WRAPPERS 79 bool 80 81config KRETPROBES 82 def_bool y 83 depends on KPROBES && HAVE_KRETPROBES 84 85config HAVE_IOREMAP_PROT 86 bool 87 88config HAVE_KPROBES 89 bool 90 91config HAVE_KRETPROBES 92 bool 93 94# 95# An arch should select this if it provides all these things: 96# 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() 106# 107config HAVE_ARCH_TRACEHOOK 108 bool 109 110config HAVE_DMA_ATTRS 111 bool 112 113config USE_GENERIC_SMP_HELPERS 114 bool 115 116config HAVE_CLK 117 bool 118 help 119 The <linux/clk.h> calls support software clock gating and 120 thus are a key power management tool on many systems. 121 122config HAVE_DMA_API_DEBUG 123 bool 124 125config HAVE_DEFAULT_NO_SPIN_MUTEXES 126 bool 127 128source "kernel/gcov/Kconfig" 129