Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/arch/powerpc/Kconfig

  1 source "arch/powerpc/platforms/Kconfig.cputype"
  2 
  3 config PPC32
  4         bool
  5         default y if !PPC64
  6 
  7 config 32BIT
  8         bool
  9         default y if PPC32
 10 
 11 config 64BIT
 12         bool
 13         default y if PPC64
 14 
 15 config WORD_SIZE
 16         int
 17         default 64 if PPC64
 18         default 32 if !PPC64
 19 
 20 config ARCH_PHYS_ADDR_T_64BIT
 21        def_bool PPC64 || PHYS_64BIT
 22 
 23 config ARCH_DMA_ADDR_T_64BIT
 24         def_bool ARCH_PHYS_ADDR_T_64BIT
 25 
 26 config MMU
 27         bool
 28         default y
 29 
 30 config HAVE_SETUP_PER_CPU_AREA
 31         def_bool PPC64
 32 
 33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 34         def_bool PPC64
 35 
 36 config NR_IRQS
 37         int "Number of virtual interrupt numbers"
 38         range 32 32768
 39         default "512"
 40         help
 41           This defines the number of virtual interrupt numbers the kernel
 42           can manage. Virtual interrupt numbers are what you see in
 43           /proc/interrupts. If you configure your system to have too few,
 44           drivers will fail to load or worse - handle with care.
 45 
 46 config STACKTRACE_SUPPORT
 47         bool
 48         default y
 49 
 50 config HAVE_LATENCYTOP_SUPPORT
 51         def_bool y
 52 
 53 config TRACE_IRQFLAGS_SUPPORT
 54         bool
 55         default y
 56 
 57 config LOCKDEP_SUPPORT
 58         bool
 59         default y
 60 
 61 config RWSEM_GENERIC_SPINLOCK
 62         bool
 63 
 64 config RWSEM_XCHGADD_ALGORITHM
 65         bool
 66         default y
 67 
 68 config GENERIC_LOCKBREAK
 69         bool
 70         default y
 71         depends on SMP && PREEMPT
 72 
 73 config ARCH_HAS_ILOG2_U32
 74         bool
 75         default y
 76 
 77 config ARCH_HAS_ILOG2_U64
 78         bool
 79         default y if 64BIT
 80 
 81 config GENERIC_HWEIGHT
 82         bool
 83         default y
 84 
 85 config PPC
 86         bool
 87         default y
 88         select ARCH_MIGHT_HAVE_PC_PARPORT
 89         select ARCH_MIGHT_HAVE_PC_SERIO
 90         select BINFMT_ELF
 91         select ARCH_HAS_ELF_RANDOMIZE
 92         select OF
 93         select OF_EARLY_FLATTREE
 94         select OF_RESERVED_MEM
 95         select HAVE_FTRACE_MCOUNT_RECORD
 96         select HAVE_DYNAMIC_FTRACE
 97         select HAVE_FUNCTION_TRACER
 98         select HAVE_FUNCTION_GRAPH_TRACER
 99         select SYSCTL_EXCEPTION_TRACE
100         select ARCH_WANT_OPTIONAL_GPIOLIB
101         select VIRT_TO_BUS if !PPC64
102         select HAVE_IDE
103         select HAVE_IOREMAP_PROT
104         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
105         select HAVE_KPROBES
106         select HAVE_ARCH_KGDB
107         select HAVE_KRETPROBES
108         select HAVE_ARCH_TRACEHOOK
109         select HAVE_MEMBLOCK
110         select HAVE_MEMBLOCK_NODE_MAP
111         select HAVE_DMA_ATTRS
112         select HAVE_DMA_API_DEBUG
113         select HAVE_OPROFILE
114         select HAVE_DEBUG_KMEMLEAK
115         select ARCH_HAS_SG_CHAIN
116         select GENERIC_ATOMIC64 if PPC32
117         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
118         select HAVE_PERF_EVENTS
119         select HAVE_REGS_AND_STACK_ACCESS_API
120         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
121         select ARCH_WANT_IPC_PARSE_VERSION
122         select SPARSE_IRQ
123         select IRQ_DOMAIN
124         select GENERIC_IRQ_SHOW
125         select GENERIC_IRQ_SHOW_LEVEL
126         select IRQ_FORCED_THREADING
127         select HAVE_RCU_TABLE_FREE if SMP
128         select HAVE_SYSCALL_TRACEPOINTS
129         select HAVE_BPF_JIT
130         select HAVE_ARCH_JUMP_LABEL
131         select ARCH_HAVE_NMI_SAFE_CMPXCHG
132         select ARCH_HAS_GCOV_PROFILE_ALL
133         select GENERIC_SMP_IDLE_THREAD
134         select GENERIC_CMOS_UPDATE
135         select GENERIC_TIME_VSYSCALL_OLD
136         select GENERIC_CLOCKEVENTS
137         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
138         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
139         select GENERIC_STRNCPY_FROM_USER
140         select GENERIC_STRNLEN_USER
141         select HAVE_MOD_ARCH_SPECIFIC
142         select MODULES_USE_ELF_RELA
143         select CLONE_BACKWARDS
144         select ARCH_USE_BUILTIN_BSWAP
145         select OLD_SIGSUSPEND
146         select OLD_SIGACTION if PPC32
147         select HAVE_DEBUG_STACKOVERFLOW
148         select HAVE_IRQ_EXIT_ON_IRQ_STACK
149         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
150         select HAVE_ARCH_AUDITSYSCALL
151         select ARCH_SUPPORTS_ATOMIC_RMW
152         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
153         select NO_BOOTMEM
154         select HAVE_GENERIC_RCU_GUP
155         select HAVE_PERF_EVENTS_NMI if PPC64
156 
157 config GENERIC_CSUM
158         def_bool CPU_LITTLE_ENDIAN
159 
160 config EARLY_PRINTK
161         bool
162         default y
163 
164 config PANIC_TIMEOUT
165         int
166         default 180
167 
168 config COMPAT
169         bool
170         default y if PPC64
171         select COMPAT_BINFMT_ELF
172         select ARCH_WANT_OLD_COMPAT_IPC
173         select COMPAT_OLD_SIGACTION
174 
175 config SYSVIPC_COMPAT
176         bool
177         depends on COMPAT && SYSVIPC
178         default y
179 
180 # All PPC32s use generic nvram driver through ppc_md
181 config GENERIC_NVRAM
182         bool
183         default y if PPC32
184 
185 config SCHED_OMIT_FRAME_POINTER
186         bool
187         default y
188 
189 config ARCH_MAY_HAVE_PC_FDC
190         bool
191         default PCI
192 
193 config PPC_UDBG_16550
194         bool
195         default n
196 
197 config GENERIC_TBSYNC
198         bool
199         default y if PPC32 && SMP
200         default n
201 
202 config AUDIT_ARCH
203         bool
204         default y
205 
206 config GENERIC_BUG
207         bool
208         default y
209         depends on BUG
210 
211 config SYS_SUPPORTS_APM_EMULATION
212         default y if PMAC_APM_EMU
213         bool
214 
215 config EPAPR_BOOT
216         bool
217         help
218           Used to allow a board to specify it wants an ePAPR compliant wrapper.
219         default n
220 
221 config DEFAULT_UIMAGE
222         bool
223         help
224           Used to allow a board to specify it wants a uImage built by default
225         default n
226 
227 config ARCH_HIBERNATION_POSSIBLE
228         bool
229         default y
230 
231 config ARCH_SUSPEND_POSSIBLE
232         def_bool y
233         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
234                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
235                    || 44x || 40x
236 
237 config PPC_DCR_NATIVE
238         bool
239         default n
240 
241 config PPC_DCR_MMIO
242         bool
243         default n
244 
245 config PPC_DCR
246         bool
247         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
248         default y
249 
250 config PPC_OF_PLATFORM_PCI
251         bool
252         depends on PCI
253         depends on PPC64 # not supported on 32 bits yet
254         default n
255 
256 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
257         depends on PPC32 || PPC_STD_MMU_64
258         def_bool y
259 
260 config ARCH_SUPPORTS_UPROBES
261         def_bool y
262 
263 config PPC_ADV_DEBUG_REGS
264         bool
265         depends on 40x || BOOKE
266         default y
267 
268 config PPC_ADV_DEBUG_IACS
269         int
270         depends on PPC_ADV_DEBUG_REGS
271         default 4 if 44x
272         default 2
273 
274 config PPC_ADV_DEBUG_DACS
275         int
276         depends on PPC_ADV_DEBUG_REGS
277         default 2
278 
279 config PPC_ADV_DEBUG_DVCS
280         int
281         depends on PPC_ADV_DEBUG_REGS
282         default 2 if 44x
283         default 0
284 
285 config PPC_ADV_DEBUG_DAC_RANGE
286         bool
287         depends on PPC_ADV_DEBUG_REGS && 44x
288         default y
289 
290 config PPC_EMULATE_SSTEP
291         bool
292         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
293 
294 config ZONE_DMA32
295         bool
296         default y if PPC64
297 
298 config PGTABLE_LEVELS
299         int
300         default 2 if !PPC64
301         default 3 if PPC_64K_PAGES
302         default 4
303 
304 source "init/Kconfig"
305 
306 source "kernel/Kconfig.freezer"
307 
308 source "arch/powerpc/sysdev/Kconfig"
309 source "arch/powerpc/platforms/Kconfig"
310 
311 menu "Kernel options"
312 
313 config HIGHMEM
314         bool "High memory support"
315         depends on PPC32
316 
317 source kernel/Kconfig.hz
318 source kernel/Kconfig.preempt
319 source "fs/Kconfig.binfmt"
320 
321 config HUGETLB_PAGE_SIZE_VARIABLE
322         bool
323         depends on HUGETLB_PAGE
324         default y
325 
326 config MATH_EMULATION
327         bool "Math emulation"
328         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
329         ---help---
330           Some PowerPC chips designed for embedded applications do not have
331           a floating-point unit and therefore do not implement the
332           floating-point instructions in the PowerPC instruction set.  If you
333           say Y here, the kernel will include code to emulate a floating-point
334           unit, which will allow programs that use floating-point
335           instructions to run.
336 
337           This is also useful to emulate missing (optional) instructions
338           such as fsqrt on cores that do have an FPU but do not implement
339           them (such as Freescale BookE).
340 
341 choice
342         prompt "Math emulation options"
343         default MATH_EMULATION_FULL
344         depends on MATH_EMULATION
345 
346 config  MATH_EMULATION_FULL
347         bool "Emulate all the floating point instructions"
348         ---help---
349           Select this option will enable the kernel to support to emulate
350           all the floating point instructions. If your SoC doesn't have
351           a FPU, you should select this.
352 
353 config MATH_EMULATION_HW_UNIMPLEMENTED
354         bool "Just emulate the FPU unimplemented instructions"
355         ---help---
356           Select this if you know there does have a hardware FPU on your
357           SoC, but some floating point instructions are not implemented by that.
358 
359 endchoice
360 
361 config PPC_TRANSACTIONAL_MEM
362        bool "Transactional Memory support for POWERPC"
363        depends on PPC_BOOK3S_64
364        depends on SMP
365        select ALTIVEC
366        select VSX
367        default n
368        ---help---
369          Support user-mode Transactional Memory on POWERPC.
370 
371 config IOMMU_HELPER
372         def_bool PPC64
373 
374 config SWIOTLB
375         bool "SWIOTLB support"
376         default n
377         select IOMMU_HELPER
378         ---help---
379           Support for IO bounce buffering for systems without an IOMMU.
380           This allows us to DMA to the full physical address space on
381           platforms where the size of a physical address is larger
382           than the bus address.  Not all platforms support this.
383 
384 config HOTPLUG_CPU
385         bool "Support for enabling/disabling CPUs"
386         depends on SMP && (PPC_PSERIES || \
387         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
388         ---help---
389           Say Y here to be able to disable and re-enable individual
390           CPUs at runtime on SMP machines.
391 
392           Say N if you are unsure.
393 
394 config ARCH_CPU_PROBE_RELEASE
395         def_bool y
396         depends on HOTPLUG_CPU
397 
398 config ARCH_ENABLE_MEMORY_HOTPLUG
399         def_bool y
400 
401 config ARCH_HAS_WALK_MEMORY
402         def_bool y
403 
404 config ARCH_ENABLE_MEMORY_HOTREMOVE
405         def_bool y
406 
407 config PPC64_SUPPORTS_MEMORY_FAILURE
408         bool "Add support for memory hwpoison"
409         depends on PPC_BOOK3S_64
410         default "y" if PPC_POWERNV
411         select ARCH_SUPPORTS_MEMORY_FAILURE
412 
413 config KEXEC
414         bool "kexec system call"
415         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
416         help
417           kexec is a system call that implements the ability to shutdown your
418           current kernel, and to start another kernel.  It is like a reboot
419           but it is independent of the system firmware.   And like a reboot
420           you can start any kernel with it, not just Linux.
421 
422           The name comes from the similarity to the exec system call.
423 
424           It is an ongoing process to be certain the hardware in a machine
425           is properly shutdown, so do not be surprised if this code does not
426           initially work for you.  As of this writing the exact hardware
427           interface is strongly in flux, so no good recommendation can be
428           made.
429 
430 config CRASH_DUMP
431         bool "Build a kdump crash kernel"
432         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
433         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
434         help
435           Build a kernel suitable for use as a kdump capture kernel.
436           The same kernel binary can be used as production kernel and dump
437           capture kernel.
438 
439 config FA_DUMP
440         bool "Firmware-assisted dump"
441         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
442         help
443           A robust mechanism to get reliable kernel crash dump with
444           assistance from firmware. This approach does not use kexec,
445           instead firmware assists in booting the kdump kernel
446           while preserving memory contents. Firmware-assisted dump
447           is meant to be a kdump replacement offering robustness and
448           speed not possible without system firmware assistance.
449 
450           If unsure, say "N"
451 
452 config IRQ_ALL_CPUS
453         bool "Distribute interrupts on all CPUs by default"
454         depends on SMP
455         help
456           This option gives the kernel permission to distribute IRQs across
457           multiple CPUs.  Saying N here will route all IRQs to the first
458           CPU.  Generally saying Y is safe, although some problems have been
459           reported with SMP Power Macintoshes with this option enabled.
460 
461 config NUMA
462         bool "NUMA support"
463         depends on PPC64
464         default y if SMP && PPC_PSERIES
465 
466 config NODES_SHIFT
467         int
468         default "8" if PPC64
469         default "4"
470         depends on NEED_MULTIPLE_NODES
471 
472 config USE_PERCPU_NUMA_NODE_ID
473         def_bool y
474         depends on NUMA
475 
476 config HAVE_MEMORYLESS_NODES
477         def_bool y
478         depends on NUMA
479 
480 config ARCH_SELECT_MEMORY_MODEL
481         def_bool y
482         depends on PPC64
483 
484 config ARCH_FLATMEM_ENABLE
485         def_bool y
486         depends on (PPC64 && !NUMA) || PPC32
487 
488 config ARCH_SPARSEMEM_ENABLE
489         def_bool y
490         depends on PPC64
491         select SPARSEMEM_VMEMMAP_ENABLE
492 
493 config ARCH_SPARSEMEM_DEFAULT
494         def_bool y
495         depends on (SMP && PPC_PSERIES) || PPC_PS3
496 
497 config SYS_SUPPORTS_HUGETLBFS
498         bool
499 
500 source "mm/Kconfig"
501 
502 config ARCH_MEMORY_PROBE
503         def_bool y
504         depends on MEMORY_HOTPLUG
505 
506 # Some NUMA nodes have memory ranges that span
507 # other nodes.  Even though a pfn is valid and
508 # between a node's start and end pfns, it may not
509 # reside on that node.  See memmap_init_zone()
510 # for details.
511 config NODES_SPAN_OTHER_NODES
512         def_bool y
513         depends on NEED_MULTIPLE_NODES
514 
515 config PPC_HAS_HASH_64K
516         bool
517         depends on PPC64
518         default n
519 
520 config STDBINUTILS
521         bool "Using standard binutils settings"
522         depends on 44x
523         default y
524         help
525           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
526           Note, that kernel will be able to run only those applications,
527           which had been compiled using binutils later than 2.17.50.0.3 with
528           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
529           the older binutils, you can patch them with a trivial patch, which
530           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
531 
532 choice
533         prompt "Page size"
534         default PPC_4K_PAGES
535         help
536           Select the kernel logical page size. Increasing the page size
537           will reduce software overhead at each page boundary, allow
538           hardware prefetch mechanisms to be more effective, and allow
539           larger dma transfers increasing IO efficiency and reducing
540           overhead. However the utilization of memory will increase.
541           For example, each cached file will using a multiple of the
542           page size to hold its contents and the difference between the
543           end of file and the end of page is wasted.
544 
545           Some dedicated systems, such as software raid serving with
546           accelerated calculations, have shown significant increases.
547 
548           If you configure a 64 bit kernel for 64k pages but the
549           processor does not support them, then the kernel will simulate
550           them with 4k pages, loading them on demand, but with the
551           reduced software overhead and larger internal fragmentation.
552           For the 32 bit kernel, a large page option will not be offered
553           unless it is supported by the configured processor.
554 
555           If unsure, choose 4K_PAGES.
556 
557 config PPC_4K_PAGES
558         bool "4k page size"
559 
560 config PPC_16K_PAGES
561         bool "16k page size" if 44x || PPC_8xx
562 
563 config PPC_64K_PAGES
564         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
565         depends on !PPC_FSL_BOOK3E
566         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
567 
568 config PPC_256K_PAGES
569         bool "256k page size" if 44x
570         depends on !STDBINUTILS
571         help
572           Make the page size 256k.
573 
574           As the ELF standard only requires alignment to support page
575           sizes up to 64k, you will need to compile all of your user
576           space applications with a non-standard binutils settings
577           (see the STDBINUTILS description for details).
578 
579           Say N unless you know what you are doing.
580 
581 endchoice
582 
583 config FORCE_MAX_ZONEORDER
584         int "Maximum zone order"
585         range 9 64 if PPC64 && PPC_64K_PAGES
586         default "9" if PPC64 && PPC_64K_PAGES
587         range 13 64 if PPC64 && !PPC_64K_PAGES
588         default "13" if PPC64 && !PPC_64K_PAGES
589         range 9 64 if PPC32 && PPC_16K_PAGES
590         default "9" if PPC32 && PPC_16K_PAGES
591         range 7 64 if PPC32 && PPC_64K_PAGES
592         default "7" if PPC32 && PPC_64K_PAGES
593         range 5 64 if PPC32 && PPC_256K_PAGES
594         default "5" if PPC32 && PPC_256K_PAGES
595         range 11 64
596         default "11"
597         help
598           The kernel memory allocator divides physically contiguous memory
599           blocks into "zones", where each zone is a power of two number of
600           pages.  This option selects the largest power of two that the kernel
601           keeps in the memory allocator.  If you need to allocate very large
602           blocks of physically contiguous memory, then you may need to
603           increase this value.
604 
605           This config option is actually maximum order plus one. For example,
606           a value of 11 means that the largest free memory block is 2^10 pages.
607 
608           The page size is not necessarily 4KB.  For example, on 64-bit
609           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
610           this in mind when choosing a value for this option.
611 
612 config PPC_SUBPAGE_PROT
613         bool "Support setting protections for 4k subpages"
614         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
615         help
616           This option adds support for a system call to allow user programs
617           to set access permissions (read/write, readonly, or no access)
618           on the 4k subpages of each 64k page.
619 
620 config PPC_COPRO_BASE
621         bool
622         default n
623 
624 config SCHED_SMT
625         bool "SMT (Hyperthreading) scheduler support"
626         depends on PPC64 && SMP
627         help
628           SMT scheduler support improves the CPU scheduler's decision making
629           when dealing with POWER5 cpus at a cost of slightly increased
630           overhead in some places. If unsure say N here.
631 
632 config PPC_DENORMALISATION
633         bool "PowerPC denormalisation exception handling"
634         depends on PPC_BOOK3S_64
635         default "y" if PPC_POWERNV
636         ---help---
637           Add support for handling denormalisation of single precision
638           values.  Useful for bare metal only.  If unsure say Y here.
639 
640 config CMDLINE_BOOL
641         bool "Default bootloader kernel arguments"
642 
643 config CMDLINE
644         string "Initial kernel command string"
645         depends on CMDLINE_BOOL
646         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
647         help
648           On some platforms, there is currently no way for the boot loader to
649           pass arguments to the kernel. For these platforms, you can supply
650           some command-line options at build time by entering them here.  In
651           most cases you will need to specify the root device here.
652 
653 config CMDLINE_FORCE
654         bool "Always use the default kernel command string"
655         depends on CMDLINE_BOOL
656         help
657           Always use the default kernel command string, even if the boot
658           loader passes other arguments to the kernel.
659           This is useful if you cannot or don't want to change the
660           command-line options your boot loader passes to the kernel.
661 
662 config EXTRA_TARGETS
663         string "Additional default image types"
664         help
665           List additional targets to be built by the bootwrapper here (separated
666           by spaces).  This is useful for targets that depend of device tree
667           files in the .dts directory.
668 
669           Targets in this list will be build as part of the default build
670           target, or when the user does a 'make zImage' or a
671           'make zImage.initrd'.
672 
673           If unsure, leave blank
674 
675 config ARCH_WANTS_FREEZER_CONTROL
676         def_bool y
677         depends on ADB_PMU
678 
679 source kernel/power/Kconfig
680 
681 config SECCOMP
682         bool "Enable seccomp to safely compute untrusted bytecode"
683         depends on PROC_FS
684         default y
685         help
686           This kernel feature is useful for number crunching applications
687           that may need to compute untrusted bytecode during their
688           execution. By using pipes or other transports made available to
689           the process as file descriptors supporting the read/write
690           syscalls, it's possible to isolate those applications in
691           their own address space using seccomp. Once seccomp is
692           enabled via /proc/<pid>/seccomp, it cannot be disabled
693           and the task is only allowed to execute a few safe syscalls
694           defined by each seccomp mode.
695 
696           If unsure, say Y. Only embedded should say N here.
697 
698 endmenu
699 
700 config ISA_DMA_API
701         bool
702         default PCI
703 
704 menu "Bus options"
705 
706 config ISA
707         bool "Support for ISA-bus hardware"
708         depends on PPC_CHRP
709         select PPC_I8259
710         help
711           Find out whether you have ISA slots on your motherboard.  ISA is the
712           name of a bus system, i.e. the way the CPU talks to the other stuff
713           inside your box.  If you have an Apple machine, say N here; if you
714           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
715           embedded board, consult your board documentation.
716 
717 config ZONE_DMA
718         bool
719         default y
720 
721 config NEED_DMA_MAP_STATE
722         def_bool (PPC64 || NOT_COHERENT_CACHE)
723 
724 config NEED_SG_DMA_LENGTH
725         def_bool y
726 
727 config GENERIC_ISA_DMA
728         bool
729         depends on ISA_DMA_API
730         default y
731 
732 config PPC_INDIRECT_PCI
733         bool
734         depends on PCI
735         default y if 40x || 44x
736         default n
737 
738 config EISA
739         bool
740 
741 config SBUS
742         bool
743 
744 config FSL_SOC
745         bool
746 
747 config FSL_PCI
748         bool
749         select PPC_INDIRECT_PCI
750         select PCI_QUIRKS
751 
752 config FSL_PMC
753         bool
754         default y
755         depends on SUSPEND && (PPC_85xx || PPC_86xx)
756         help
757           Freescale MPC85xx/MPC86xx power management controller support
758           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
759 
760 config PPC4xx_CPM
761         bool
762         default y
763         depends on SUSPEND && (44x || 40x)
764         help
765           PPC4xx Clock Power Management (CPM) support (suspend/resume).
766           It also enables support for two different idle states (idle-wait
767           and idle-doze).
768 
769 config 4xx_SOC
770         bool
771 
772 config FSL_LBC
773         bool "Freescale Local Bus support"
774         depends on FSL_SOC
775         help
776           Enables reporting of errors from the Freescale local bus
777           controller.  Also contains some common code used by
778           drivers for specific local bus peripherals.
779 
780 config FSL_GTM
781         bool
782         depends on PPC_83xx || QUICC_ENGINE || CPM2
783         help
784           Freescale General-purpose Timers support
785 
786 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
787 config MCA
788         bool
789 
790 # Platforms that what PCI turned unconditionally just do select PCI
791 # in their config node.  Platforms that want to choose at config
792 # time should select PPC_PCI_CHOICE
793 config PPC_PCI_CHOICE
794         bool
795 
796 config PCI
797         bool "PCI support" if PPC_PCI_CHOICE
798         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
799                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
800         default PCI_QSPAN if !4xx && !CPM2 && 8xx
801         select GENERIC_PCI_IOMAP
802         help
803           Find out whether your system includes a PCI bus. PCI is the name of
804           a bus system, i.e. the way the CPU talks to the other stuff inside
805           your box.  If you say Y here, the kernel will include drivers and
806           infrastructure code to support PCI bus devices.
807 
808 config PCI_DOMAINS
809         def_bool PCI
810 
811 config PCI_SYSCALL
812         def_bool PCI
813 
814 config PCI_QSPAN
815         bool "QSpan PCI"
816         depends on !4xx && !CPM2 && 8xx
817         select PPC_I8259
818         help
819           Say Y here if you have a system based on a Motorola 8xx-series
820           embedded processor with a QSPAN PCI interface, otherwise say N.
821 
822 config PCI_8260
823         bool
824         depends on PCI && 8260
825         select PPC_INDIRECT_PCI
826         default y
827 
828 source "drivers/pci/pcie/Kconfig"
829 
830 source "drivers/pci/Kconfig"
831 
832 source "drivers/pcmcia/Kconfig"
833 
834 source "drivers/pci/hotplug/Kconfig"
835 
836 config HAS_RAPIDIO
837         bool
838         default n
839 
840 config RAPIDIO
841         tristate "RapidIO support"
842         depends on HAS_RAPIDIO || PCI
843         help
844           If you say Y here, the kernel will include drivers and
845           infrastructure code to support RapidIO interconnect devices.
846 
847 config FSL_RIO
848         bool "Freescale Embedded SRIO Controller support"
849         depends on RAPIDIO = y && HAS_RAPIDIO
850         default "n"
851         ---help---
852           Include support for RapidIO controller on Freescale embedded
853           processors (MPC8548, MPC8641, etc).
854 
855 source "drivers/rapidio/Kconfig"
856 
857 endmenu
858 
859 config NONSTATIC_KERNEL
860         bool
861         default n
862 
863 menu "Advanced setup"
864         depends on PPC32
865 
866 config ADVANCED_OPTIONS
867         bool "Prompt for advanced kernel configuration options"
868         help
869           This option will enable prompting for a variety of advanced kernel
870           configuration options.  These options can cause the kernel to not
871           work if they are set incorrectly, but can be used to optimize certain
872           aspects of kernel memory management.
873 
874           Unless you know what you are doing, say N here.
875 
876 comment "Default settings for advanced configuration options are used"
877         depends on !ADVANCED_OPTIONS
878 
879 config LOWMEM_SIZE_BOOL
880         bool "Set maximum low memory"
881         depends on ADVANCED_OPTIONS
882         help
883           This option allows you to set the maximum amount of memory which
884           will be used as "low memory", that is, memory which the kernel can
885           access directly, without having to set up a kernel virtual mapping.
886           This can be useful in optimizing the layout of kernel virtual
887           memory.
888 
889           Say N here unless you know what you are doing.
890 
891 config LOWMEM_SIZE
892         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
893         default "0x30000000"
894 
895 config LOWMEM_CAM_NUM_BOOL
896         bool "Set number of CAMs to use to map low memory"
897         depends on ADVANCED_OPTIONS && FSL_BOOKE
898         help
899           This option allows you to set the maximum number of CAM slots that
900           will be used to map low memory.  There are a limited number of slots
901           available and even more limited number that will fit in the L1 MMU.
902           However, using more entries will allow mapping more low memory.  This
903           can be useful in optimizing the layout of kernel virtual memory.
904 
905           Say N here unless you know what you are doing.
906 
907 config LOWMEM_CAM_NUM
908         depends on FSL_BOOKE
909         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
910         default 3
911 
912 config DYNAMIC_MEMSTART
913         bool "Enable page aligned dynamic load address for kernel"
914         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
915         select NONSTATIC_KERNEL
916         help
917           This option enables the kernel to be loaded at any page aligned
918           physical address. The kernel creates a mapping from KERNELBASE to 
919           the address where the kernel is loaded. The page size here implies
920           the TLB page size of the mapping for kernel on the particular platform.
921           Please refer to the init code for finding the TLB page size.
922 
923           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
924           kernel image, where the only restriction is the page aligned kernel
925           load address. When this option is enabled, the compile time physical 
926           address CONFIG_PHYSICAL_START is ignored.
927 
928           This option is overridden by CONFIG_RELOCATABLE
929 
930 config RELOCATABLE
931         bool "Build a relocatable kernel"
932         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
933         select NONSTATIC_KERNEL
934         help
935           This builds a kernel image that is capable of running at the
936           location the kernel is loaded at, without any alignment restrictions.
937           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
938 
939           One use is for the kexec on panic case where the recovery kernel
940           must live at a different physical address than the primary
941           kernel.
942 
943           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
944           it has been loaded at and the compile time physical addresses
945           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
946           setting can still be useful to bootwrappers that need to know the
947           load address of the kernel (eg. u-boot/mkimage).
948 
949 config RELOCATABLE_PPC32
950         def_bool y
951         depends on PPC32 && RELOCATABLE
952 
953 config PAGE_OFFSET_BOOL
954         bool "Set custom page offset address"
955         depends on ADVANCED_OPTIONS
956         help
957           This option allows you to set the kernel virtual address at which
958           the kernel will map low memory.  This can be useful in optimizing
959           the virtual memory layout of the system.
960 
961           Say N here unless you know what you are doing.
962 
963 config PAGE_OFFSET
964         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
965         default "0xc0000000"
966 
967 config KERNEL_START_BOOL
968         bool "Set custom kernel base address"
969         depends on ADVANCED_OPTIONS
970         help
971           This option allows you to set the kernel virtual address at which
972           the kernel will be loaded.  Normally this should match PAGE_OFFSET
973           however there are times (like kdump) that one might not want them
974           to be the same.
975 
976           Say N here unless you know what you are doing.
977 
978 config KERNEL_START
979         hex "Virtual address of kernel base" if KERNEL_START_BOOL
980         default PAGE_OFFSET if PAGE_OFFSET_BOOL
981         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
982         default "0xc0000000"
983 
984 config PHYSICAL_START_BOOL
985         bool "Set physical address where the kernel is loaded"
986         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
987         help
988           This gives the physical address where the kernel is loaded.
989 
990           Say N here unless you know what you are doing.
991 
992 config PHYSICAL_START
993         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
994         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
995         default "0x00000000"
996 
997 config PHYSICAL_ALIGN
998         hex
999         default "0x04000000" if FSL_BOOKE
1000         help
1001           This value puts the alignment restrictions on physical address
1002           where kernel is loaded and run from. Kernel is compiled for an
1003           address which meets above alignment restriction.
1004 
1005 config TASK_SIZE_BOOL
1006         bool "Set custom user task size"
1007         depends on ADVANCED_OPTIONS
1008         help
1009           This option allows you to set the amount of virtual address space
1010           allocated to user tasks.  This can be useful in optimizing the
1011           virtual memory layout of the system.
1012 
1013           Say N here unless you know what you are doing.
1014 
1015 config TASK_SIZE
1016         hex "Size of user task space" if TASK_SIZE_BOOL
1017         default "0x80000000" if PPC_8xx
1018         default "0xc0000000"
1019 
1020 config CONSISTENT_SIZE_BOOL
1021         bool "Set custom consistent memory pool size"
1022         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1023         help
1024           This option allows you to set the size of the
1025           consistent memory pool.  This pool of virtual memory
1026           is used to make consistent memory allocations.
1027 
1028 config CONSISTENT_SIZE
1029         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1030         default "0x00200000" if NOT_COHERENT_CACHE
1031 
1032 config PIN_TLB
1033         bool "Pinned Kernel TLBs (860 ONLY)"
1034         depends on ADVANCED_OPTIONS && 8xx
1035 endmenu
1036 
1037 if PPC64
1038 config RELOCATABLE
1039         bool "Build a relocatable kernel"
1040         depends on !COMPILE_TEST
1041         select NONSTATIC_KERNEL
1042         help
1043           This builds a kernel image that is capable of running anywhere
1044           in the RMA (real memory area) at any 16k-aligned base address.
1045           The kernel is linked as a position-independent executable (PIE)
1046           and contains dynamic relocations which are processed early
1047           in the bootup process.
1048 
1049           One use is for the kexec on panic case where the recovery kernel
1050           must live at a different physical address than the primary
1051           kernel.
1052 
1053 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1054 config PAGE_OFFSET
1055         hex
1056         default "0xc000000000000000"
1057 config KERNEL_START
1058         hex
1059         default "0xc000000000000000"
1060 config PHYSICAL_START
1061         hex
1062         default "0x00000000"
1063 endif
1064 
1065 config  ARCH_RANDOM
1066         def_bool n
1067 
1068 source "net/Kconfig"
1069 
1070 source "drivers/Kconfig"
1071 
1072 source "fs/Kconfig"
1073 
1074 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1075 
1076 source "lib/Kconfig"
1077 
1078 source "arch/powerpc/Kconfig.debug"
1079 
1080 source "security/Kconfig"
1081 
1082 config KEYS_COMPAT
1083         bool
1084         depends on COMPAT && KEYS
1085         default y
1086 
1087 source "crypto/Kconfig"
1088 
1089 config PPC_LIB_RHEAP
1090         bool
1091 
1092 source "arch/powerpc/kvm/Kconfig"

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