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,
21 depends on KALLSYMS && MODULES
22 depends on HAVE_KPROBES
24 Kprobes allows you to trap at almost any kernel address and
25 execute a callback function. register_kprobe() establishes
26 a probepoint and specifies the callback. Kprobes is useful
27 for kernel debugging, non-intrusive instrumentation and testing.
30 config HAVE_EFFICIENT_UNALIGNED_ACCESS
33 Some architectures are unable to perform unaligned accesses
34 without the use of get_unaligned/put_unaligned. Others are
35 unable to perform such accesses efficiently (e.g. trap on
36 unaligned access and require fixing it up in the exception
39 This symbol should be selected by an architecture if it can
40 perform unaligned accesses efficiently to allow different
41 code paths to be selected for these cases. Some network
42 drivers, for example, could opt to not fix up alignment
43 problems with received packets if doing so would not help
46 See Documentation/unaligned-memory-access.txt for more
47 information on the topic of unaligned memory accesses.
51 depends on KPROBES && HAVE_KRETPROBES
53 config HAVE_IOREMAP_PROT
59 config HAVE_KRETPROBES
63 # An arch should select this if it provides all these things:
65 # task_pt_regs() in asm/processor.h or asm/ptrace.h
66 # arch_has_single_step() if there is hardware single-step support
67 # arch_has_block_step() if there is hardware block-step support
68 # arch_ptrace() and not #define __ARCH_SYS_PTRACE
69 # compat_arch_ptrace() and #define __ARCH_WANT_COMPAT_SYS_PTRACE
70 # asm/syscall.h supplying asm-generic/syscall.h interface
71 # linux/regset.h user_regset interfaces
72 # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
73 # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
74 # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
75 # signal delivery calls tracehook_signal_handler()
77 config HAVE_ARCH_TRACEHOOK
83 config USE_GENERIC_SMP_HELPERS
89 The <linux/clk.h> calls support software clock gating and
90 thus are a key power management tool on many systems.