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 def_bool n 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 def_bool n 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 def_bool n 69 70config HAVE_KPROBES 71 def_bool n 72 73config HAVE_KRETPROBES 74 def_bool n 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# arch_ptrace() and not #define __ARCH_SYS_PTRACE 83# compat_arch_ptrace() and #define __ARCH_WANT_COMPAT_SYS_PTRACE 84# asm/syscall.h supplying asm-generic/syscall.h interface 85# linux/regset.h user_regset interfaces 86# CORE_DUMP_USE_REGSET #define'd in linux/elf.h 87# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit} 88# TIF_NOTIFY_RESUME calls tracehook_notify_resume() 89# signal delivery calls tracehook_signal_handler() 90# 91config HAVE_ARCH_TRACEHOOK 92 def_bool n 93 94config HAVE_DMA_ATTRS 95 def_bool n 96 97config USE_GENERIC_SMP_HELPERS 98 def_bool n 99 100config HAVE_CLK 101 def_bool n 102 help 103 The <linux/clk.h> calls support software clock gating and 104 thus are a key power management tool on many systems. 105 106