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
475 config PPC_IBM_CELL_BLADE
476 bool "IBM Cell Blade"
477 depends on PPC_MULTIPLATFORM && PPC64
478 select PPC_CELL_NATIVE
481 select PPC_UDBG_16550
482 select UDBG_RTAS_CONSOLE
484 config UDBG_RTAS_CONSOLE
485 bool "RTAS based debug console"
490 depends on PPC_PSERIES
496 depends on PPC_MULTIPLATFORM && PPC64
503 config RTAS_ERROR_LOGGING
509 bool "Proc interface to RTAS"
514 tristate "Firmware flash interface"
515 depends on PPC64 && RTAS_PROC
521 config MPIC_BROKEN_U3
527 depends on PPC_PSERIES || PPC_ISERIES
532 depends on PPC_PSERIES
533 bool "Support for GX bus based adapters"
535 Bus device driver for GX bus based adapters.
545 source "drivers/cpufreq/Kconfig"
548 bool "Support for Apple PowerBooks"
549 depends on CPU_FREQ && ADB_PMU && PPC32
550 select CPU_FREQ_TABLE
552 This adds support for frequency switching on Apple PowerBooks,
553 this currently includes some models of iBook & Titanium
556 config CPU_FREQ_PMAC64
557 bool "Support for some Apple G5s"
558 depends on CPU_FREQ && PPC64
559 select CPU_FREQ_TABLE
561 This adds support for frequency switching on Apple iMac G5,
562 and some of the more recent desktop G5 machines as well.
564 config PPC601_SYNC_FIX
565 bool "Workarounds for PPC601 bugs"
566 depends on 6xx && (PPC_PREP || PPC_PMAC)
568 Some versions of the PPC601 (the first PowerPC chip) have bugs which
569 mean that extra synchronization instructions are required near
570 certain instructions, typically those that make major changes to the
571 CPU state. These extra instructions reduce performance slightly.
572 If you say N here, these extra instructions will not be included,
573 resulting in a kernel which will run faster but may not run at all
574 on some systems with the PPC601 chip.
576 If in doubt, say Y here.
579 bool "On-chip CPU temperature sensor support"
582 G3 and G4 processors have an on-chip temperature sensor called the
583 'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
584 temperature within 2-4 degrees Celsius. This option shows the current
585 on-die temperature in /proc/cpuinfo if the cpu supports it.
587 Unfortunately, on some chip revisions, this sensor is very inaccurate
588 and in many cases, does not work at all, so don't assume the cpu
589 temp is actually what /proc/cpuinfo says it is.
592 bool "Interrupt driven TAU driver (DANGEROUS)"
595 The TAU supports an interrupt driven mode which causes an interrupt
596 whenever the temperature goes out of range. This is the fastest way
597 to get notified the temp has exceeded a range. With this option off,
598 a timer is used to re-check the temperature periodically.
600 However, on some cpus it appears that the TAU interrupt hardware
601 is buggy and can cause a situation which would lead unexplained hard
604 Unless you are extending the TAU driver, or enjoy kernel/hardware
605 debugging, leave this option off.
608 bool "Average high and low temp"
611 The TAU hardware can compare the temperature to an upper and lower
612 bound. The default behavior is to show both the upper and lower
613 bound in /proc/cpuinfo. If the range is large, the temperature is
614 either changing a lot, or the TAU hardware is broken (likely on some
615 G4's). If the range is small (around 4 degrees), the temperature is
616 relatively stable. If you say Y here, a single temperature value,
617 halfway between the upper and lower bounds, will be reported in
620 If in doubt, say N here.
624 source arch/powerpc/platforms/embedded6xx/Kconfig
625 source arch/powerpc/platforms/4xx/Kconfig
626 source arch/powerpc/platforms/82xx/Kconfig
627 source arch/powerpc/platforms/83xx/Kconfig
628 source arch/powerpc/platforms/85xx/Kconfig
629 source arch/powerpc/platforms/86xx/Kconfig
630 source arch/powerpc/platforms/8xx/Kconfig
631 source arch/powerpc/platforms/cell/Kconfig
633 menu "Kernel options"
636 bool "High memory support"
639 source kernel/Kconfig.hz
640 source kernel/Kconfig.preempt
641 source "fs/Kconfig.binfmt"
643 # We optimistically allocate largepages from the VM, so make the limit
644 # large enough (16MB). This badly named config option is actually
646 config FORCE_MAX_ZONEORDER
649 default "9" if PPC_64K_PAGES
652 config MATH_EMULATION
653 bool "Math emulation"
654 depends on 4xx || 8xx || E200 || E500
656 Some PowerPC chips designed for embedded applications do not have
657 a floating-point unit and therefore do not implement the
658 floating-point instructions in the PowerPC instruction set. If you
659 say Y here, the kernel will include code to emulate a floating-point
660 unit, which will allow programs that use floating-point
664 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
665 depends on EXPERIMENTAL && PPC64
668 Cause IO segments sent to a device for DMA to be merged virtually
669 by the IOMMU when they happen to have been allocated contiguously.
670 This doesn't add pressure to the IOMMU allocator. However, some
671 drivers don't support getting large merged segments coming back
672 from *_map_sg(). Say Y if you know the drivers you are using are
673 properly handling this case.
676 bool "Support for enabling/disabling CPUs"
677 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
679 Say Y here to be able to disable and re-enable individual
680 CPUs at runtime on SMP machines.
682 Say N if you are unsure.
684 config ARCH_ENABLE_MEMORY_HOTPLUG
688 bool "kexec system call (EXPERIMENTAL)"
689 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
691 kexec is a system call that implements the ability to shutdown your
692 current kernel, and to start another kernel. It is like a reboot
693 but it is independent of the system firmware. And like a reboot
694 you can start any kernel with it, not just Linux.
696 The name comes from the similarity to the exec system call.
698 It is an ongoing process to be certain the hardware in a machine
699 is properly shutdown, so do not be surprised if this code does not
700 initially work for you. It may help to enable device hotplugging
701 support. As of this writing the exact hardware interface is
702 strongly in flux, so no good recommendation can be made.
705 bool "Build a kdump crash kernel (EXPERIMENTAL)"
706 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
708 Build a kernel suitable for use as a kdump capture kernel.
709 The kernel will be linked at a different address than normal, and
710 so can only be used for Kdump.
712 Don't change this unless you know what you are doing.
716 depends on 8xx || 8260
720 bool "PC PS/2 style Keyboard"
721 depends on 4xx || CPM2
724 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
725 default y if PPC_PREP
728 bool "Distribute interrupts on all CPUs by default"
729 depends on SMP && !MV64360
731 This option gives the kernel permission to distribute IRQs across
732 multiple CPUs. Saying N here will route all IRQs to the first
733 CPU. Generally saying Y is safe, although some problems have been
734 reported with SMP Power Macintoshes with this option enabled.
736 source "arch/powerpc/platforms/pseries/Kconfig"
741 default y if SMP && PPC_PSERIES
746 depends on NEED_MULTIPLE_NODES
748 config ARCH_SELECT_MEMORY_MODEL
752 config ARCH_FLATMEM_ENABLE
754 depends on (PPC64 && !NUMA) || PPC32
756 config ARCH_SPARSEMEM_ENABLE
760 config ARCH_SPARSEMEM_DEFAULT
762 depends on (SMP && PPC_PSERIES) || PPC_CELL
764 config ARCH_POPULATES_NODE_MAP
769 config ARCH_MEMORY_PROBE
771 depends on MEMORY_HOTPLUG
773 # Some NUMA nodes have memory ranges that span
774 # other nodes. Even though a pfn is valid and
775 # between a node's start and end pfns, it may not
776 # reside on that node. See memmap_init_zone()
778 config NODES_SPAN_OTHER_NODES
780 depends on NEED_MULTIPLE_NODES
786 This option changes the kernel logical page size to 64k. On machines
787 without processor support for 64k pages, the kernel will simulate
788 them by loading each individual 4k page on demand transparently,
789 while on hardware with such support, it will be used to map
790 normal application pages.
793 bool "SMT (Hyperthreading) scheduler support"
794 depends on PPC64 && SMP
796 SMT scheduler support improves the CPU scheduler's decision making
797 when dealing with POWER5 cpus at a cost of slightly increased
798 overhead in some places. If unsure say N here.
800 config PROC_DEVICETREE
801 bool "Support for device tree in /proc"
804 This option adds a device-tree directory under /proc which contains
805 an image of the device tree that the kernel copies from Open
806 Firmware or other boot firmware. If unsure, say Y here.
808 source "arch/powerpc/platforms/prep/Kconfig"
811 bool "Default bootloader kernel arguments"
812 depends on !PPC_ISERIES
815 string "Initial kernel command string"
816 depends on CMDLINE_BOOL
817 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
819 On some platforms, there is currently no way for the boot loader to
820 pass arguments to the kernel. For these platforms, you can supply
821 some command-line options at build time by entering them here. In
822 most cases you will need to specify the root device here.
825 source kernel/power/Kconfig
829 bool "Enable seccomp to safely compute untrusted bytecode"
833 This kernel feature is useful for number crunching applications
834 that may need to compute untrusted bytecode during their
835 execution. By using pipes or other transports made available to
836 the process as file descriptors supporting the read/write
837 syscalls, it's possible to isolate those applications in
838 their own address space using seccomp. Once seccomp is
839 enabled via /proc/<pid>/seccomp, it cannot be disabled
840 and the task is only allowed to execute a few safe syscalls
841 defined by each seccomp mode.
843 If unsure, say Y. Only embedded should say N here.
854 bool "Support for ISA-bus hardware"
855 depends on PPC_PREP || PPC_CHRP
858 Find out whether you have ISA slots on your motherboard. ISA is the
859 name of a bus system, i.e. the way the CPU talks to the other stuff
860 inside your box. If you have an Apple machine, say N here; if you
861 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
862 you have an embedded board, consult your board documentation.
864 config GENERIC_ISA_DMA
866 depends on PPC64 || POWER4 || 6xx && !CPM2
881 config PPC_INDIRECT_PCI
884 default y if 40x || 44x
896 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
901 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
902 || PPC_MPC52xx || (EMBEDDED && PPC_ISERIES) || MPC7448HPC2
903 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
904 && !PPC_85xx && !PPC_86xx
905 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
906 default PCI_QSPAN if !4xx && !CPM2 && 8xx
908 Find out whether your system includes a PCI bus. PCI is the name of
909 a bus system, i.e. the way the CPU talks to the other stuff inside
910 your box. If you say Y here, the kernel will include drivers and
911 infrastructure code to support PCI bus devices.
919 depends on !4xx && !CPM2 && 8xx
922 Say Y here if you have a system based on a Motorola 8xx-series
923 embedded processor with a QSPAN PCI interface, otherwise say N.
927 depends on PCI && 8260
928 select PPC_INDIRECT_PCI
932 bool "Enable workaround for MPC826x erratum PCI 9"
933 depends on PCI_8260 && !ADS8272
937 prompt "IDMA channel for PCI 9 workaround"
940 config 8260_PCI9_IDMA1
943 config 8260_PCI9_IDMA2
946 config 8260_PCI9_IDMA3
949 config 8260_PCI9_IDMA4
954 source "drivers/pci/pcie/Kconfig"
956 source "drivers/pci/Kconfig"
958 source "drivers/pcmcia/Kconfig"
960 source "drivers/pci/hotplug/Kconfig"
964 menu "Advanced setup"
967 config ADVANCED_OPTIONS
968 bool "Prompt for advanced kernel configuration options"
970 This option will enable prompting for a variety of advanced kernel
971 configuration options. These options can cause the kernel to not
972 work if they are set incorrectly, but can be used to optimize certain
973 aspects of kernel memory management.
975 Unless you know what you are doing, say N here.
977 comment "Default settings for advanced configuration options are used"
978 depends on !ADVANCED_OPTIONS
980 config HIGHMEM_START_BOOL
981 bool "Set high memory pool address"
982 depends on ADVANCED_OPTIONS && HIGHMEM
984 This option allows you to set the base address of the kernel virtual
985 area used to map high memory pages. This can be useful in
986 optimizing the layout of kernel virtual memory.
988 Say N here unless you know what you are doing.
991 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
994 config LOWMEM_SIZE_BOOL
995 bool "Set maximum low memory"
996 depends on ADVANCED_OPTIONS
998 This option allows you to set the maximum amount of memory which
999 will be used as "low memory", that is, memory which the kernel can
1000 access directly, without having to set up a kernel virtual mapping.
1001 This can be useful in optimizing the layout of kernel virtual
1004 Say N here unless you know what you are doing.
1007 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1008 default "0x30000000"
1010 config KERNEL_START_BOOL
1011 bool "Set custom kernel base address"
1012 depends on ADVANCED_OPTIONS
1014 This option allows you to set the kernel virtual address at which
1015 the kernel will map low memory (the kernel image will be linked at
1016 this address). This can be useful in optimizing the virtual memory
1017 layout of the system.
1019 Say N here unless you know what you are doing.
1022 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1023 default "0xc0000000"
1025 config TASK_SIZE_BOOL
1026 bool "Set custom user task size"
1027 depends on ADVANCED_OPTIONS
1029 This option allows you to set the amount of virtual address space
1030 allocated to user tasks. This can be useful in optimizing the
1031 virtual memory layout of the system.
1033 Say N here unless you know what you are doing.
1036 hex "Size of user task space" if TASK_SIZE_BOOL
1037 default "0x80000000"
1039 config CONSISTENT_START_BOOL
1040 bool "Set custom consistent memory pool address"
1041 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1043 This option allows you to set the base virtual address
1044 of the consistent memory pool. This pool of virtual
1045 memory is used to make consistent memory allocations.
1047 config CONSISTENT_START
1048 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
1049 default "0xff100000" if NOT_COHERENT_CACHE
1051 config CONSISTENT_SIZE_BOOL
1052 bool "Set custom consistent memory pool size"
1053 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1055 This option allows you to set the size of the
1056 consistent memory pool. This pool of virtual memory
1057 is used to make consistent memory allocations.
1059 config CONSISTENT_SIZE
1060 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1061 default "0x00200000" if NOT_COHERENT_CACHE
1063 config BOOT_LOAD_BOOL
1064 bool "Set the boot link/load address"
1065 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
1067 This option allows you to set the initial load address of the zImage
1068 or zImage.initrd file. This can be useful if you are on a board
1069 which has a small amount of memory.
1071 Say N here unless you know what you are doing.
1074 hex "Link/load address for booting" if BOOT_LOAD_BOOL
1075 default "0x00400000" if 40x || 8xx || 8260
1076 default "0x01000000" if 44x
1077 default "0x00800000"
1080 bool "Pinned Kernel TLBs (860 ONLY)"
1081 depends on ADVANCED_OPTIONS && 8xx
1087 default "0xc000000000000000"
1090 source "net/Kconfig"
1092 source "drivers/Kconfig"
1096 # XXX source "arch/ppc/8xx_io/Kconfig"
1098 # XXX source "arch/ppc/8260_io/Kconfig"
1100 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1102 source "arch/powerpc/platforms/iseries/Kconfig"
1104 source "lib/Kconfig"
1106 menu "Instrumentation Support"
1107 depends on EXPERIMENTAL
1109 source "arch/powerpc/oprofile/Kconfig"
1112 bool "Kprobes (EXPERIMENTAL)"
1113 depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES
1115 Kprobes allows you to trap at almost any kernel address and
1116 execute a callback function. register_kprobe() establishes
1117 a probepoint and specifies the callback. Kprobes is useful
1118 for kernel debugging, non-intrusive instrumentation and testing.
1119 If in doubt, say "N".
1122 source "arch/powerpc/Kconfig.debug"
1124 source "security/Kconfig"
1128 depends on COMPAT && KEYS
1131 source "crypto/Kconfig"