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