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 help 10 OProfile is a profiling system capable of profiling the 11 whole system, include the kernel, kernel modules, libraries, 12 and applications. 13 14 If unsure, say N. 15 16config OPROFILE_IBS 17 bool "OProfile AMD IBS support (EXPERIMENTAL)" 18 default n 19 depends on OPROFILE && SMP && X86 20 help 21 Instruction-Based Sampling (IBS) is a new profiling 22 technique that provides rich, precise program performance 23 information. IBS is introduced by AMD Family10h processors 24 (AMD Opteron Quad-Core processor "Barcelona") to overcome 25 the limitations of conventional performance counter 26 sampling. 27 28 If unsure, say N. 29 30config HAVE_OPROFILE 31 bool 32 33config KPROBES 34 bool "Kprobes" 35 depends on KALLSYMS && MODULES 36 depends on HAVE_KPROBES 37 help 38 Kprobes allows you to trap at almost any kernel address and 39 execute a callback function. register_kprobe() establishes 40 a probepoint and specifies the callback. Kprobes is useful 41 for kernel debugging, non-intrusive instrumentation and testing. 42 If in doubt, say "N". 43 44config HAVE_EFFICIENT_UNALIGNED_ACCESS 45 bool 46 help 47 Some architectures are unable to perform unaligned accesses 48 without the use of get_unaligned/put_unaligned. Others are 49 unable to perform such accesses efficiently (e.g. trap on 50 unaligned access and require fixing it up in the exception 51 handler.) 52 53 This symbol should be selected by an architecture if it can 54 perform unaligned accesses efficiently to allow different 55 code paths to be selected for these cases. Some network 56 drivers, for example, could opt to not fix up alignment 57 problems with received packets if doing so would not help 58 much. 59 60 See Documentation/unaligned-memory-access.txt for more 61 information on the topic of unaligned memory accesses. 62 63config KRETPROBES 64 def_bool y 65 depends on KPROBES && HAVE_KRETPROBES 66 67config HAVE_IOREMAP_PROT 68 bool 69 70config HAVE_KPROBES 71 bool 72 73config HAVE_KRETPROBES 74 bool 75 76# 77# An arch should select this if it provides all these things: 78# 79# task_pt_regs() in asm/processor.h or asm/ptrace.h 80# arch_has_single_step() if there is hardware single-step support 81# arch_has_block_step() if there is hardware block-step support 82# asm/syscall.h supplying asm-generic/syscall.h interface 83# linux/regset.h user_regset interfaces 84# CORE_DUMP_USE_REGSET #define'd in linux/elf.h 85# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit} 86# TIF_NOTIFY_RESUME calls tracehook_notify_resume() 87# signal delivery calls tracehook_signal_handler() 88# 89config HAVE_ARCH_TRACEHOOK 90 bool 91 92config HAVE_DMA_ATTRS 93 bool 94 95config USE_GENERIC_SMP_HELPERS 96 bool 97 98config HAVE_CLK 99 bool 100 help 101 The <linux/clk.h> calls support software clock gating and 102 thus are a key power management tool on many systems. 103 104