2 # General architecture dependent options
6 tristate "OProfile system profiling (EXPERIMENTAL)"
8 depends on HAVE_OPROFILE
12 OProfile is a profiling system capable of profiling the
13 whole system, include the kernel, kernel modules, libraries,
19 bool "OProfile AMD IBS support (EXPERIMENTAL)"
21 depends on OPROFILE && SMP && X86
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
37 depends on KALLSYMS && MODULES
38 depends on HAVE_KPROBES
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.
46 config HAVE_EFFICIENT_UNALIGNED_ACCESS
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
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
62 See Documentation/unaligned-memory-access.txt for more
63 information on the topic of unaligned memory accesses.
65 config HAVE_SYSCALL_WRAPPERS
70 depends on KPROBES && HAVE_KRETPROBES
72 config HAVE_IOREMAP_PROT
78 config HAVE_KRETPROBES
82 # An arch should select this if it provides all these things:
84 # task_pt_regs() in asm/processor.h or asm/ptrace.h
85 # arch_has_single_step() if there is hardware single-step support
86 # arch_has_block_step() if there is hardware block-step support
87 # asm/syscall.h supplying asm-generic/syscall.h interface
88 # linux/regset.h user_regset interfaces
89 # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
90 # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
91 # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
92 # signal delivery calls tracehook_signal_handler()
94 config HAVE_ARCH_TRACEHOOK
100 config USE_GENERIC_SMP_HELPERS
106 The <linux/clk.h> calls support software clock gating and
107 thus are a key power management tool on many systems.