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 select RING_BUFFER_ALLOW_SWAP 13 help 14 OProfile is a profiling system capable of profiling the 15 whole system, include the kernel, kernel modules, libraries, 16 and applications. 17 18 If unsure, say N. 19 20config OPROFILE_IBS 21 bool "OProfile AMD IBS support (EXPERIMENTAL)" 22 default n 23 depends on OPROFILE && SMP && X86 24 help 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 30 sampling. 31 32 If unsure, say N. 33 34config OPROFILE_EVENT_MULTIPLEX 35 bool "OProfile multiplexing support (EXPERIMENTAL)" 36 default n 37 depends on OPROFILE && X86 38 help 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. 43 44 If unsure, say N. 45 46config HAVE_OPROFILE 47 bool 48 49config KPROBES 50 bool "Kprobes" 51 depends on KALLSYMS && MODULES 52 depends on HAVE_KPROBES 53 help 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. 58 If in doubt, say "N". 59 60config HAVE_EFFICIENT_UNALIGNED_ACCESS 61 bool 62 help 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 67 handler.) 68 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 74 much. 75 76 See Documentation/unaligned-memory-access.txt for more 77 information on the topic of unaligned memory accesses. 78 79config HAVE_SYSCALL_WRAPPERS 80 bool 81 82config KRETPROBES 83 def_bool y 84 depends on KPROBES && HAVE_KRETPROBES 85 86config USER_RETURN_NOTIFIER 87 bool 88 depends on HAVE_USER_RETURN_NOTIFIER 89 help 90 Provide a kernel-internal notification when a cpu is about to 91 switch to user mode. 92 93config HAVE_IOREMAP_PROT 94 bool 95 96config HAVE_KPROBES 97 bool 98 99config HAVE_KRETPROBES 100 bool 101 102# 103# An arch should select this if it provides all these things: 104# 105# task_pt_regs() in asm/processor.h or asm/ptrace.h 106# arch_has_single_step() if there is hardware single-step support 107# arch_has_block_step() if there is hardware block-step support 108# asm/syscall.h supplying asm-generic/syscall.h interface 109# linux/regset.h user_regset interfaces 110# CORE_DUMP_USE_REGSET #define'd in linux/elf.h 111# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit} 112# TIF_NOTIFY_RESUME calls tracehook_notify_resume() 113# signal delivery calls tracehook_signal_handler() 114# 115config HAVE_ARCH_TRACEHOOK 116 bool 117 118config HAVE_DMA_ATTRS 119 bool 120 121config USE_GENERIC_SMP_HELPERS 122 bool 123 124config HAVE_CLK 125 bool 126 help 127 The <linux/clk.h> calls support software clock gating and 128 thus are a key power management tool on many systems. 129 130config HAVE_DMA_API_DEBUG 131 bool 132 133config HAVE_DEFAULT_NO_SPIN_MUTEXES 134 bool 135 136config HAVE_HW_BREAKPOINT 137 bool 138 depends on PERF_EVENTS 139 140config HAVE_USER_RETURN_NOTIFIER 141 bool 142 143source "kernel/gcov/Kconfig" 144