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Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig new file mode 100644 index 00000000..26b0e239 --- /dev/null +++ b/arch/Kconfig @@ -0,0 +1,181 @@ +# +# General architecture dependent options +# + +config OPROFILE + tristate "OProfile system profiling" + depends on PROFILING + depends on HAVE_OPROFILE + select RING_BUFFER + select RING_BUFFER_ALLOW_SWAP + 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_EVENT_MULTIPLEX + bool "OProfile multiplexing support (EXPERIMENTAL)" + default n + depends on OPROFILE && X86 + help + The number of hardware counters is limited. The multiplexing + feature enables OProfile to gather more events than counters + are provided by the hardware. This is realized by switching + between events at an user specified time interval. + + If unsure, say N. + +config HAVE_OPROFILE + bool + +config KPROBES + bool "Kprobes" + depends on MODULES + depends on HAVE_KPROBES + select KALLSYMS + 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 JUMP_LABEL + bool "Optimize trace point call sites" + depends on HAVE_ARCH_JUMP_LABEL + help + If it is detected that the compiler has support for "asm goto", + the kernel will compile trace point locations with just a + nop instruction. When trace points are enabled, the nop will + be converted to a jump to the trace function. This technique + lowers overhead and stress on the branch prediction of the + processor. + + On i386, options added to the compiler flags may increase + the size of the kernel slightly. + +config OPTPROBES + def_bool y + depends on KPROBES && HAVE_OPTPROBES + depends on !PREEMPT + +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 HAVE_SYSCALL_WRAPPERS + bool + +config KRETPROBES + def_bool y + depends on KPROBES && HAVE_KRETPROBES + +config USER_RETURN_NOTIFIER + bool + depends on HAVE_USER_RETURN_NOTIFIER + help + Provide a kernel-internal notification when a cpu is about to + switch to user mode. + +config HAVE_IOREMAP_PROT + bool + +config HAVE_KPROBES + bool + +config HAVE_KRETPROBES + bool + +config HAVE_OPTPROBES + 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 +# 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_REGS_AND_STACK_ACCESS_API + bool + help + This symbol should be selected by an architecure if it supports + the API needed to access registers and stack entries from pt_regs, + declared in asm/ptrace.h + For example the kprobes-based event tracer needs this API. + +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. + +config HAVE_DMA_API_DEBUG + bool + +config HAVE_HW_BREAKPOINT + bool + depends on PERF_EVENTS + +config HAVE_MIXED_BREAKPOINTS_REGS + bool + depends on HAVE_HW_BREAKPOINT + help + Depending on the arch implementation of hardware breakpoints, + some of them have separate registers for data and instruction + breakpoints addresses, others have mixed registers to store + them but define the access type in a control register. + Select this option if your arch implements breakpoints under the + latter fashion. + +config HAVE_USER_RETURN_NOTIFIER + bool + +config HAVE_PERF_EVENTS_NMI + bool + help + System hardware can generate an NMI using the perf event + subsystem. Also has support for calculating CPU cycle events + to determine how many clock cycles in a given period. + +config HAVE_ARCH_JUMP_LABEL + bool + +config HAVE_ARCH_MUTEX_CPU_RELAX + bool + +config HAVE_RCU_TABLE_FREE + bool + +source "kernel/gcov/Kconfig" |