2 # General architecture dependent options
6 tristate "OProfile system profiling (EXPERIMENTAL)"
8 depends on HAVE_OPROFILE
10 OProfile is a profiling system capable of profiling the
11 whole system, include the kernel, kernel modules, libraries,
17 bool "OProfile AMD IBS support (EXPERIMENTAL)"
19 depends on OPROFILE && SMP && X86
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
35 depends on KALLSYMS && MODULES
36 depends on HAVE_KPROBES
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.
44 config HAVE_EFFICIENT_UNALIGNED_ACCESS
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
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
60 See Documentation/unaligned-memory-access.txt for more
61 information on the topic of unaligned memory accesses.
65 depends on KPROBES && HAVE_KRETPROBES
67 config HAVE_IOREMAP_PROT
73 config HAVE_KRETPROBES
77 # An arch should select this if it provides all these things:
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()
91 config HAVE_ARCH_TRACEHOOK
97 config USE_GENERIC_SMP_HELPERS
103 The <linux/clk.h> calls support software clock gating and
104 thus are a key power management tool on many systems.