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- #
- # General architecture dependent options
- #
- config OPROFILE
- tristate "OProfile system profiling (EXPERIMENTAL)"
- depends on PROFILING
- depends on HAVE_OPROFILE
- help
- OProfile is a profiling system capable of profiling the
- whole system, include the kernel, kernel modules, libraries,
- and applications.
- If unsure, say N.
- config OPROFILE_IBS
- bool "OProfile AMD IBS support (EXPERIMENTAL)"
- default n
- depends on OPROFILE && SMP && X86
- help
- Instruction-Based Sampling (IBS) is a new profiling
- technique that provides rich, precise program performance
- information. IBS is introduced by AMD Family10h processors
- (AMD Opteron Quad-Core processor "Barcelona") to overcome
- the limitations of conventional performance counter
- sampling.
- If unsure, say N.
- config HAVE_OPROFILE
- bool
- config KPROBES
- bool "Kprobes"
- depends on KALLSYMS && MODULES
- depends on HAVE_KPROBES
- help
- Kprobes allows you to trap at almost any kernel address and
- execute a callback function. register_kprobe() establishes
- a probepoint and specifies the callback. Kprobes is useful
- for kernel debugging, non-intrusive instrumentation and testing.
- If in doubt, say "N".
- config HAVE_EFFICIENT_UNALIGNED_ACCESS
- bool
- help
- Some architectures are unable to perform unaligned accesses
- without the use of get_unaligned/put_unaligned. Others are
- unable to perform such accesses efficiently (e.g. trap on
- unaligned access and require fixing it up in the exception
- handler.)
- This symbol should be selected by an architecture if it can
- perform unaligned accesses efficiently to allow different
- code paths to be selected for these cases. Some network
- drivers, for example, could opt to not fix up alignment
- problems with received packets if doing so would not help
- much.
- See Documentation/unaligned-memory-access.txt for more
- information on the topic of unaligned memory accesses.
- config KRETPROBES
- def_bool y
- depends on KPROBES && HAVE_KRETPROBES
- config HAVE_IOREMAP_PROT
- bool
- config HAVE_KPROBES
- bool
- config HAVE_KRETPROBES
- bool
- #
- # An arch should select this if it provides all these things:
- #
- # task_pt_regs() in asm/processor.h or asm/ptrace.h
- # arch_has_single_step() if there is hardware single-step support
- # arch_has_block_step() if there is hardware block-step support
- # arch_ptrace() and not #define __ARCH_SYS_PTRACE
- # compat_arch_ptrace() and #define __ARCH_WANT_COMPAT_SYS_PTRACE
- # asm/syscall.h supplying asm-generic/syscall.h interface
- # linux/regset.h user_regset interfaces
- # CORE_DUMP_USE_REGSET #define'd in linux/elf.h
- # TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
- # TIF_NOTIFY_RESUME calls tracehook_notify_resume()
- # signal delivery calls tracehook_signal_handler()
- #
- config HAVE_ARCH_TRACEHOOK
- bool
- config HAVE_DMA_ATTRS
- bool
- config USE_GENERIC_SMP_HELPERS
- bool
- config HAVE_CLK
- bool
- help
- The <linux/clk.h> calls support software clock gating and
- thus are a key power management tool on many systems.
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