1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
5 mainmenu "Linux/PowerPC Kernel Configuration"
11 This option selects whether a 32-bit or a 64-bit kernel
29 config GENERIC_HARDIRQS
37 config RWSEM_GENERIC_SPINLOCK
40 config RWSEM_XCHGADD_ALGORITHM
44 config GENERIC_HWEIGHT
48 config GENERIC_CALIBRATE_DELAY
52 config GENERIC_FIND_NEXT_BIT
70 depends on COMPAT && SYSVIPC
73 # All PPC32s use generic nvram driver through ppc_md
78 config SCHED_NO_NO_OMIT_FRAME_POINTER
82 config ARCH_MAY_HAVE_PC_FDC
95 default y if PPC32 && SMP
102 config DEFAULT_UIMAGE
105 Used to allow a board to specify it wants a uImage built by default
108 menu "Processor support"
110 prompt "Processor Type"
119 There are four families of PowerPC chips supported. The more common
120 types (601, 603, 604, 740, 750, 7400), the Motorola embedded
121 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
122 embedded versions (403 and 405) and the high end 64 bit Power
123 processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
125 Unless you are building a kernel for one of the embedded processor
126 systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx.
127 Note that the kernel runs in 32-bit mode even on 64-bit chips.
130 bool "Freescale 52xx"
135 bool "Freescale 82xx"
140 bool "Freescale 83xx"
147 bool "Freescale 85xx"
153 bool "Freescale 86xx"
159 The Freescale E600 SoCs have 74xx cores.
163 select PPC_DCR_NATIVE
167 select PPC_DCR_NATIVE
173 bool "Freescale e200"
178 bool "Optimize for POWER4"
182 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
183 The resulting binary will not work on POWER3 or RS64 processors
184 when compiled with binutils 2.15 or later.
189 default y if !POWER4_ONLY
198 # this is temp to handle compat with arch=ppc
202 # this is temp to handle compat with arch=ppc
213 config PPC_DCR_NATIVE
223 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
228 depends on E200 || E500
233 depends on E200 || E500
238 depends on 44x || E500
240 default y if E500 && PHYS_64BIT
243 bool 'Large physical address support' if E500
244 depends on 44x || E500
247 This option enables kernel support for larger than 32-bit physical
248 addresses. This features is not be available on all e500 cores.
250 If in doubt, say N here.
253 bool "AltiVec Support"
254 depends on CLASSIC32 || POWER4
256 This option enables kernel support for the Altivec extensions to the
257 PowerPC processor. The kernel currently supports saving and restoring
258 altivec registers, and turning on the 'altivec enable' bit so user
259 processes can execute altivec instructions.
261 This option is only usefully if you have a processor that supports
262 altivec (G4, otherwise known as 74xx series), but does not have
263 any affect on a non-altivec cpu (it does, however add code to the
266 If in doubt, say Y here.
270 depends on E200 || E500
273 This option enables kernel support for the Signal Processing
274 Extensions (SPE) to the PowerPC processor. The kernel currently
275 supports saving and restoring SPE registers, and turning on the
276 'spe enable' bit so user processes can execute SPE instructions.
278 This option is only useful if you have a processor that supports
279 SPE (e500, otherwise known as 85xx series), but does not have any
280 effect on a non-spe cpu (it does, however add code to the kernel).
282 If in doubt, say Y here.
286 depends on 6xx || POWER3 || POWER4 || PPC64
289 config PPC_STD_MMU_32
291 depends on PPC_STD_MMU && PPC32
293 config VIRT_CPU_ACCOUNTING
294 bool "Deterministic task and CPU time accounting"
298 Select this option to enable more accurate task and CPU time
299 accounting. This is done by reading a CPU counter on each
300 kernel entry and exit and on transitions within the kernel
301 between system, softirq and hardirq state, so there is a
302 small performance impact. This also enables accounting of
303 stolen time on logically-partitioned systems running on
304 IBM POWER5-based machines.
306 If in doubt, say Y here.
309 depends on PPC_STD_MMU
310 bool "Symmetric multi-processing support"
312 This enables support for systems with more than one CPU. If you have
313 a system with only one CPU, say N. If you have a system with more
314 than one CPU, say Y. Note that the kernel does not currently
315 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
316 since they have inadequate hardware support for multiprocessor
319 If you say N here, the kernel will run on single and multiprocessor
320 machines, but will use only one CPU of a multiprocessor machine. If
321 you say Y here, the kernel will run on single-processor machines.
322 On a single-processor machine, the kernel will run faster if you say
325 If you don't know what to do here, say N.
328 int "Maximum number of CPUs (2-128)"
331 default "32" if PPC64
334 config NOT_COHERENT_CACHE
336 depends on 4xx || 8xx || E200
340 source "init/Kconfig"
342 menu "Platform support"
343 depends on PPC64 || CLASSIC32
346 prompt "Machine type"
347 default PPC_MULTIPLATFORM
349 config PPC_MULTIPLATFORM
350 bool "Generic desktop/server/laptop"
352 Select this option if configuring for an IBM pSeries or
353 RS/6000 machine, an Apple machine, or a PReP, CHRP,
354 Maple or Cell-based machine.
357 bool "Embedded 6xx/7xx/7xxx-based board"
358 depends on PPC32 && (BROKEN||BROKEN_ON_SMP)
362 depends on PPC32 && BROKEN
364 Select APUS if configuring for a PowerUP Amiga.
365 More information is available at:
366 <http://linux-apus.sourceforge.net/>.
371 depends on PPC_MPC836x || PPC_MPC832x
374 The QUICC Engine (QE) is a new generation of communications
375 coprocessors on Freescale embedded CPUs (akin to CPM in older chips).
376 Selecting this option means that you wish to build a kernel
377 for a machine with a QE coprocessor.
380 depends on PPC_MULTIPLATFORM && PPC64
381 bool "IBM pSeries & new (POWER5-based) iSeries"
385 select RTAS_ERROR_LOGGING
386 select PPC_UDBG_16550
390 bool "IBM Legacy iSeries"
391 depends on PPC_MULTIPLATFORM && PPC64
394 bool "Common Hardware Reference Platform (CHRP) based machines"
395 depends on PPC_MULTIPLATFORM && PPC32
398 select PPC_INDIRECT_PCI
401 select PPC_UDBG_16550
405 bool "bPlan Efika 5k2. MPC5200B based computer"
406 depends on PPC_MULTIPLATFORM && PPC32
413 bool "Apple PowerMac based machines"
414 depends on PPC_MULTIPLATFORM
416 select PPC_INDIRECT_PCI if PPC32
417 select PPC_MPC106 if PPC32
422 depends on PPC_PMAC && POWER4
425 select MPIC_BROKEN_U3
426 select GENERIC_TBSYNC
431 bool "PowerPC Reference Platform (PReP) based machines"
432 depends on PPC_MULTIPLATFORM && PPC32 && BROKEN
435 select PPC_INDIRECT_PCI
436 select PPC_UDBG_16550
440 depends on PPC_MULTIPLATFORM && PPC64
441 bool "Maple 970FX Evaluation Board"
444 select MPIC_BROKEN_U3
445 select GENERIC_TBSYNC
446 select PPC_UDBG_16550
450 This option enables support for the Maple 970FX Evaluation Board.
451 For more information, refer to <http://www.970eval.com>
454 depends on PPC_MULTIPLATFORM && PPC64
455 bool "PA Semi SoC-based platforms"
458 select PPC_UDBG_16550
459 select GENERIC_TBSYNC
461 This option enables support for PA Semi's PWRficient line
462 of SoC processors, including PA6T-1682M
468 config PPC_CELL_NATIVE
474 config PPC_IBM_CELL_BLADE
475 bool "IBM Cell Blade"
476 depends on PPC_MULTIPLATFORM && PPC64
477 select PPC_CELL_NATIVE
480 select PPC_UDBG_16550
481 select UDBG_RTAS_CONSOLE
483 config UDBG_RTAS_CONSOLE
484 bool "RTAS based debug console"
489 depends on PPC_PSERIES
495 depends on PPC_MULTIPLATFORM && PPC64
502 config RTAS_ERROR_LOGGING
508 bool "Proc interface to RTAS"
513 tristate "Firmware flash interface"
514 depends on PPC64 && RTAS_PROC
520 config MPIC_BROKEN_U3
526 depends on PPC_PSERIES || PPC_ISERIES
531 depends on PPC_PSERIES
532 bool "Support for GX bus based adapters"
534 Bus device driver for GX bus based adapters.
544 source "drivers/cpufreq/Kconfig"
547 bool "Support for Apple PowerBooks"
548 depends on CPU_FREQ && ADB_PMU && PPC32
549 select CPU_FREQ_TABLE
551 This adds support for frequency switching on Apple PowerBooks,
552 this currently includes some models of iBook & Titanium
555 config CPU_FREQ_PMAC64
556 bool "Support for some Apple G5s"
557 depends on CPU_FREQ && PPC64
558 select CPU_FREQ_TABLE
560 This adds support for frequency switching on Apple iMac G5,
561 and some of the more recent desktop G5 machines as well.
563 config PPC601_SYNC_FIX
564 bool "Workarounds for PPC601 bugs"
565 depends on 6xx && (PPC_PREP || PPC_PMAC)
567 Some versions of the PPC601 (the first PowerPC chip) have bugs which
568 mean that extra synchronization instructions are required near
569 certain instructions, typically those that make major changes to the
570 CPU state. These extra instructions reduce performance slightly.
571 If you say N here, these extra instructions will not be included,
572 resulting in a kernel which will run faster but may not run at all
573 on some systems with the PPC601 chip.
575 If in doubt, say Y here.
578 bool "On-chip CPU temperature sensor support"
581 G3 and G4 processors have an on-chip temperature sensor called the
582 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
583 temperature within 2-4 degrees Celsius. This option shows the current
584 on-die temperature in /proc/cpuinfo if the cpu supports it.
586 Unfortunately, on some chip revisions, this sensor is very inaccurate
587 and in many cases, does not work at all, so don't assume the cpu
588 temp is actually what /proc/cpuinfo says it is.
591 bool "Interrupt driven TAU driver (DANGEROUS)"
594 The TAU supports an interrupt driven mode which causes an interrupt
595 whenever the temperature goes out of range. This is the fastest way
596 to get notified the temp has exceeded a range. With this option off,
597 a timer is used to re-check the temperature periodically.
599 However, on some cpus it appears that the TAU interrupt hardware
600 is buggy and can cause a situation which would lead unexplained hard
603 Unless you are extending the TAU driver, or enjoy kernel/hardware
604 debugging, leave this option off.
607 bool "Average high and low temp"
610 The TAU hardware can compare the temperature to an upper and lower
611 bound. The default behavior is to show both the upper and lower
612 bound in /proc/cpuinfo. If the range is large, the temperature is
613 either changing a lot, or the TAU hardware is broken (likely on some
614 G4's). If the range is small (around 4 degrees), the temperature is
615 relatively stable. If you say Y here, a single temperature value,
616 halfway between the upper and lower bounds, will be reported in
619 If in doubt, say N here.
623 source arch/powerpc/platforms/embedded6xx/Kconfig
624 source arch/powerpc/platforms/4xx/Kconfig
625 source arch/powerpc/platforms/82xx/Kconfig
626 source arch/powerpc/platforms/83xx/Kconfig
627 source arch/powerpc/platforms/85xx/Kconfig
628 source arch/powerpc/platforms/86xx/Kconfig
629 source arch/powerpc/platforms/8xx/Kconfig
630 source arch/powerpc/platforms/cell/Kconfig
632 menu "Kernel options"
635 bool "High memory support"
638 source kernel/Kconfig.hz
639 source kernel/Kconfig.preempt
640 source "fs/Kconfig.binfmt"
642 # We optimistically allocate largepages from the VM, so make the limit
643 # large enough (16MB). This badly named config option is actually
645 config FORCE_MAX_ZONEORDER
648 default "9" if PPC_64K_PAGES
651 config MATH_EMULATION
652 bool "Math emulation"
653 depends on 4xx || 8xx || E200 || E500
655 Some PowerPC chips designed for embedded applications do not have
656 a floating-point unit and therefore do not implement the
657 floating-point instructions in the PowerPC instruction set. If you
658 say Y here, the kernel will include code to emulate a floating-point
659 unit, which will allow programs that use floating-point
663 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
664 depends on EXPERIMENTAL && PPC64
667 Cause IO segments sent to a device for DMA to be merged virtually
668 by the IOMMU when they happen to have been allocated contiguously.
669 This doesn't add pressure to the IOMMU allocator. However, some
670 drivers don't support getting large merged segments coming back
671 from *_map_sg(). Say Y if you know the drivers you are using are
672 properly handling this case.
675 bool "Support for enabling/disabling CPUs"
676 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
678 Say Y here to be able to disable and re-enable individual
679 CPUs at runtime on SMP machines.
681 Say N if you are unsure.
683 config ARCH_ENABLE_MEMORY_HOTPLUG
687 bool "kexec system call (EXPERIMENTAL)"
688 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
690 kexec is a system call that implements the ability to shutdown your
691 current kernel, and to start another kernel. It is like a reboot
692 but it is independent of the system firmware. And like a reboot
693 you can start any kernel with it, not just Linux.
695 The name comes from the similarity to the exec system call.
697 It is an ongoing process to be certain the hardware in a machine
698 is properly shutdown, so do not be surprised if this code does not
699 initially work for you. It may help to enable device hotplugging
700 support. As of this writing the exact hardware interface is
701 strongly in flux, so no good recommendation can be made.
704 bool "Build a kdump crash kernel (EXPERIMENTAL)"
705 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
707 Build a kernel suitable for use as a kdump capture kernel.
708 The kernel will be linked at a different address than normal, and
709 so can only be used for Kdump.
711 Don't change this unless you know what you are doing.
715 depends on 8xx || 8260
719 bool "PC PS/2 style Keyboard"
720 depends on 4xx || CPM2
723 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
724 default y if PPC_PREP
727 bool "Distribute interrupts on all CPUs by default"
728 depends on SMP && !MV64360
730 This option gives the kernel permission to distribute IRQs across
731 multiple CPUs. Saying N here will route all IRQs to the first
732 CPU. Generally saying Y is safe, although some problems have been
733 reported with SMP Power Macintoshes with this option enabled.
735 source "arch/powerpc/platforms/pseries/Kconfig"
740 default y if SMP && PPC_PSERIES
745 depends on NEED_MULTIPLE_NODES
747 config ARCH_SELECT_MEMORY_MODEL
751 config ARCH_FLATMEM_ENABLE
753 depends on (PPC64 && !NUMA) || PPC32
755 config ARCH_SPARSEMEM_ENABLE
759 config ARCH_SPARSEMEM_DEFAULT
761 depends on (SMP && PPC_PSERIES) || PPC_CELL
763 config ARCH_POPULATES_NODE_MAP
768 config ARCH_MEMORY_PROBE
770 depends on MEMORY_HOTPLUG
772 # Some NUMA nodes have memory ranges that span
773 # other nodes. Even though a pfn is valid and
774 # between a node's start and end pfns, it may not
775 # reside on that node. See memmap_init_zone()
777 config NODES_SPAN_OTHER_NODES
779 depends on NEED_MULTIPLE_NODES
785 This option changes the kernel logical page size to 64k. On machines
786 without processor support for 64k pages, the kernel will simulate
787 them by loading each individual 4k page on demand transparently,
788 while on hardware with such support, it will be used to map
789 normal application pages.
792 bool "SMT (Hyperthreading) scheduler support"
793 depends on PPC64 && SMP
795 SMT scheduler support improves the CPU scheduler's decision making
796 when dealing with POWER5 cpus at a cost of slightly increased
797 overhead in some places. If unsure say N here.
799 config PROC_DEVICETREE
800 bool "Support for device tree in /proc"
803 This option adds a device-tree directory under /proc which contains
804 an image of the device tree that the kernel copies from Open
805 Firmware or other boot firmware. If unsure, say Y here.
807 source "arch/powerpc/platforms/prep/Kconfig"
810 bool "Default bootloader kernel arguments"
811 depends on !PPC_ISERIES
814 string "Initial kernel command string"
815 depends on CMDLINE_BOOL
816 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
818 On some platforms, there is currently no way for the boot loader to
819 pass arguments to the kernel. For these platforms, you can supply
820 some command-line options at build time by entering them here. In
821 most cases you will need to specify the root device here.
824 source kernel/power/Kconfig
828 bool "Enable seccomp to safely compute untrusted bytecode"
832 This kernel feature is useful for number crunching applications
833 that may need to compute untrusted bytecode during their
834 execution. By using pipes or other transports made available to
835 the process as file descriptors supporting the read/write
836 syscalls, it's possible to isolate those applications in
837 their own address space using seccomp. Once seccomp is
838 enabled via /proc/<pid>/seccomp, it cannot be disabled
839 and the task is only allowed to execute a few safe syscalls
840 defined by each seccomp mode.
842 If unsure, say Y. Only embedded should say N here.
853 bool "Support for ISA-bus hardware"
854 depends on PPC_PREP || PPC_CHRP
857 Find out whether you have ISA slots on your motherboard. ISA is the
858 name of a bus system, i.e. the way the CPU talks to the other stuff
859 inside your box. If you have an Apple machine, say N here; if you
860 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
861 you have an embedded board, consult your board documentation.
863 config GENERIC_ISA_DMA
865 depends on PPC64 || POWER4 || 6xx && !CPM2
880 config PPC_INDIRECT_PCI
883 default y if 40x || 44x
895 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
900 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
901 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2
902 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
903 && !PPC_85xx && !PPC_86xx
904 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
905 default PCI_QSPAN if !4xx && !CPM2 && 8xx
907 Find out whether your system includes a PCI bus. PCI is the name of
908 a bus system, i.e. the way the CPU talks to the other stuff inside
909 your box. If you say Y here, the kernel will include drivers and
910 infrastructure code to support PCI bus devices.
918 depends on !4xx && !CPM2 && 8xx
921 Say Y here if you have a system based on a Motorola 8xx-series
922 embedded processor with a QSPAN PCI interface, otherwise say N.
926 depends on PCI && 8260
927 select PPC_INDIRECT_PCI
931 bool "Enable workaround for MPC826x erratum PCI 9"
932 depends on PCI_8260 && !ADS8272
936 prompt "IDMA channel for PCI 9 workaround"
939 config 8260_PCI9_IDMA1
942 config 8260_PCI9_IDMA2
945 config 8260_PCI9_IDMA3
948 config 8260_PCI9_IDMA4
953 source "drivers/pci/pcie/Kconfig"
955 source "drivers/pci/Kconfig"
957 source "drivers/pcmcia/Kconfig"
959 source "drivers/pci/hotplug/Kconfig"
963 menu "Advanced setup"
966 config ADVANCED_OPTIONS
967 bool "Prompt for advanced kernel configuration options"
969 This option will enable prompting for a variety of advanced kernel
970 configuration options. These options can cause the kernel to not
971 work if they are set incorrectly, but can be used to optimize certain
972 aspects of kernel memory management.
974 Unless you know what you are doing, say N here.
976 comment "Default settings for advanced configuration options are used"
977 depends on !ADVANCED_OPTIONS
979 config HIGHMEM_START_BOOL
980 bool "Set high memory pool address"
981 depends on ADVANCED_OPTIONS && HIGHMEM
983 This option allows you to set the base address of the kernel virtual
984 area used to map high memory pages. This can be useful in
985 optimizing the layout of kernel virtual memory.
987 Say N here unless you know what you are doing.
990 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
993 config LOWMEM_SIZE_BOOL
994 bool "Set maximum low memory"
995 depends on ADVANCED_OPTIONS
997 This option allows you to set the maximum amount of memory which
998 will be used as "low memory", that is, memory which the kernel can
999 access directly, without having to set up a kernel virtual mapping.
1000 This can be useful in optimizing the layout of kernel virtual
1003 Say N here unless you know what you are doing.
1006 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1007 default "0x30000000"
1009 config KERNEL_START_BOOL
1010 bool "Set custom kernel base address"
1011 depends on ADVANCED_OPTIONS
1013 This option allows you to set the kernel virtual address at which
1014 the kernel will map low memory (the kernel image will be linked at
1015 this address). This can be useful in optimizing the virtual memory
1016 layout of the system.
1018 Say N here unless you know what you are doing.
1021 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1022 default "0xc0000000"
1024 config TASK_SIZE_BOOL
1025 bool "Set custom user task size"
1026 depends on ADVANCED_OPTIONS
1028 This option allows you to set the amount of virtual address space
1029 allocated to user tasks. This can be useful in optimizing the
1030 virtual memory layout of the system.
1032 Say N here unless you know what you are doing.
1035 hex "Size of user task space" if TASK_SIZE_BOOL
1036 default "0x80000000"
1038 config CONSISTENT_START_BOOL
1039 bool "Set custom consistent memory pool address"
1040 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1042 This option allows you to set the base virtual address
1043 of the consistent memory pool. This pool of virtual
1044 memory is used to make consistent memory allocations.
1046 config CONSISTENT_START
1047 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
1048 default "0xff100000" if NOT_COHERENT_CACHE
1050 config CONSISTENT_SIZE_BOOL
1051 bool "Set custom consistent memory pool size"
1052 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1054 This option allows you to set the size of the
1055 consistent memory pool. This pool of virtual memory
1056 is used to make consistent memory allocations.
1058 config CONSISTENT_SIZE
1059 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1060 default "0x00200000" if NOT_COHERENT_CACHE
1062 config BOOT_LOAD_BOOL
1063 bool "Set the boot link/load address"
1064 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
1066 This option allows you to set the initial load address of the zImage
1067 or zImage.initrd file. This can be useful if you are on a board
1068 which has a small amount of memory.
1070 Say N here unless you know what you are doing.
1073 hex "Link/load address for booting" if BOOT_LOAD_BOOL
1074 default "0x00400000" if 40x || 8xx || 8260
1075 default "0x01000000" if 44x
1076 default "0x00800000"
1079 bool "Pinned Kernel TLBs (860 ONLY)"
1080 depends on ADVANCED_OPTIONS && 8xx
1086 default "0xc000000000000000"
1089 source "net/Kconfig"
1091 source "drivers/Kconfig"
1095 # XXX source "arch/ppc/8xx_io/Kconfig"
1097 # XXX source "arch/ppc/8260_io/Kconfig"
1099 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1101 source "arch/powerpc/platforms/iseries/Kconfig"
1103 source "lib/Kconfig"
1105 menu "Instrumentation Support"
1106 depends on EXPERIMENTAL
1108 source "arch/powerpc/oprofile/Kconfig"
1111 bool "Kprobes (EXPERIMENTAL)"
1112 depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES
1114 Kprobes allows you to trap at almost any kernel address and
1115 execute a callback function. register_kprobe() establishes
1116 a probepoint and specifies the callback. Kprobes is useful
1117 for kernel debugging, non-intrusive instrumentation and testing.
1118 If in doubt, say "N".
1121 source "arch/powerpc/Kconfig.debug"
1123 source "security/Kconfig"
1127 depends on COMPAT && KEYS
1130 source "crypto/Kconfig"