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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 TRACE_IRQFLAGS_SUPPORT
 51         bool
 52         default y
 53 
 54 config LOCKDEP_SUPPORT
 55         bool
 56         default y
 57 
 58 config RWSEM_GENERIC_SPINLOCK
 59         bool
 60 
 61 config RWSEM_XCHGADD_ALGORITHM
 62         bool
 63         default y
 64 
 65 config GENERIC_LOCKBREAK
 66         bool
 67         default y
 68         depends on SMP && PREEMPT
 69 
 70 config ARCH_HAS_ILOG2_U32
 71         bool
 72         default y
 73 
 74 config ARCH_HAS_ILOG2_U64
 75         bool
 76         default y if 64BIT
 77 
 78 config GENERIC_HWEIGHT
 79         bool
 80         default y
 81 
 82 config ARCH_HAS_DMA_SET_COHERENT_MASK
 83         bool
 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_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
 98         select HAVE_FUNCTION_TRACER
 99         select HAVE_FUNCTION_GRAPH_TRACER
100         select SYSCTL_EXCEPTION_TRACE
101         select ARCH_WANT_OPTIONAL_GPIOLIB
102         select VIRT_TO_BUS if !PPC64
103         select HAVE_IDE
104         select HAVE_IOREMAP_PROT
105         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
106         select HAVE_KPROBES
107         select HAVE_ARCH_KGDB
108         select HAVE_KRETPROBES
109         select HAVE_ARCH_TRACEHOOK
110         select HAVE_MEMBLOCK
111         select HAVE_MEMBLOCK_NODE_MAP
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_PERF_REGS
120         select HAVE_PERF_USER_STACK_DUMP
121         select HAVE_REGS_AND_STACK_ACCESS_API
122         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
123         select ARCH_WANT_IPC_PARSE_VERSION
124         select SPARSE_IRQ
125         select IRQ_DOMAIN
126         select GENERIC_IRQ_SHOW
127         select GENERIC_IRQ_SHOW_LEVEL
128         select IRQ_FORCED_THREADING
129         select HAVE_RCU_TABLE_FREE if SMP
130         select HAVE_SYSCALL_TRACEPOINTS
131         select HAVE_CBPF_JIT if CPU_BIG_ENDIAN
132         select HAVE_ARCH_JUMP_LABEL
133         select ARCH_HAVE_NMI_SAFE_CMPXCHG
134         select ARCH_HAS_GCOV_PROFILE_ALL
135         select GENERIC_SMP_IDLE_THREAD
136         select GENERIC_CMOS_UPDATE
137         select GENERIC_TIME_VSYSCALL_OLD
138         select GENERIC_CLOCKEVENTS
139         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
140         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
141         select GENERIC_STRNCPY_FROM_USER
142         select GENERIC_STRNLEN_USER
143         select HAVE_MOD_ARCH_SPECIFIC
144         select MODULES_USE_ELF_RELA
145         select CLONE_BACKWARDS
146         select ARCH_USE_BUILTIN_BSWAP
147         select OLD_SIGSUSPEND
148         select OLD_SIGACTION if PPC32
149         select HAVE_DEBUG_STACKOVERFLOW
150         select HAVE_IRQ_EXIT_ON_IRQ_STACK
151         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
152         select HAVE_ARCH_AUDITSYSCALL
153         select ARCH_SUPPORTS_ATOMIC_RMW
154         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
155         select NO_BOOTMEM
156         select HAVE_GENERIC_RCU_GUP
157         select HAVE_PERF_EVENTS_NMI if PPC64
158         select HAVE_NMI if PERF_EVENTS
159         select EDAC_SUPPORT
160         select EDAC_ATOMIC_SCRUB
161         select ARCH_HAS_DMA_SET_COHERENT_MASK
162         select ARCH_HAS_DEVMEM_IS_ALLOWED
163         select HAVE_ARCH_SECCOMP_FILTER
164         select ARCH_HAS_UBSAN_SANITIZE_ALL
165         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
166         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
167 
168 config GENERIC_CSUM
169         def_bool CPU_LITTLE_ENDIAN
170 
171 config EARLY_PRINTK
172         bool
173         default y
174 
175 config PANIC_TIMEOUT
176         int
177         default 180
178 
179 config COMPAT
180         bool
181         default y if PPC64
182         select COMPAT_BINFMT_ELF
183         select ARCH_WANT_OLD_COMPAT_IPC
184         select COMPAT_OLD_SIGACTION
185 
186 config SYSVIPC_COMPAT
187         bool
188         depends on COMPAT && SYSVIPC
189         default y
190 
191 # All PPC32s use generic nvram driver through ppc_md
192 config GENERIC_NVRAM
193         bool
194         default y if PPC32
195 
196 config SCHED_OMIT_FRAME_POINTER
197         bool
198         default y
199 
200 config ARCH_MAY_HAVE_PC_FDC
201         bool
202         default PCI
203 
204 config PPC_UDBG_16550
205         bool
206         default n
207 
208 config GENERIC_TBSYNC
209         bool
210         default y if PPC32 && SMP
211         default n
212 
213 config AUDIT_ARCH
214         bool
215         default y
216 
217 config GENERIC_BUG
218         bool
219         default y
220         depends on BUG
221 
222 config SYS_SUPPORTS_APM_EMULATION
223         default y if PMAC_APM_EMU
224         bool
225 
226 config EPAPR_BOOT
227         bool
228         help
229           Used to allow a board to specify it wants an ePAPR compliant wrapper.
230         default n
231 
232 config DEFAULT_UIMAGE
233         bool
234         help
235           Used to allow a board to specify it wants a uImage built by default
236         default n
237 
238 config ARCH_HIBERNATION_POSSIBLE
239         bool
240         default y
241 
242 config ARCH_SUSPEND_POSSIBLE
243         def_bool y
244         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
245                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
246                    || 44x || 40x
247 
248 config PPC_DCR_NATIVE
249         bool
250         default n
251 
252 config PPC_DCR_MMIO
253         bool
254         default n
255 
256 config PPC_DCR
257         bool
258         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
259         default y
260 
261 config PPC_OF_PLATFORM_PCI
262         bool
263         depends on PCI
264         depends on PPC64 # not supported on 32 bits yet
265         default n
266 
267 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
268         depends on PPC32 || PPC_STD_MMU_64
269         def_bool y
270 
271 config ARCH_SUPPORTS_UPROBES
272         def_bool y
273 
274 config PPC_ADV_DEBUG_REGS
275         bool
276         depends on 40x || BOOKE
277         default y
278 
279 config PPC_ADV_DEBUG_IACS
280         int
281         depends on PPC_ADV_DEBUG_REGS
282         default 4 if 44x
283         default 2
284 
285 config PPC_ADV_DEBUG_DACS
286         int
287         depends on PPC_ADV_DEBUG_REGS
288         default 2
289 
290 config PPC_ADV_DEBUG_DVCS
291         int
292         depends on PPC_ADV_DEBUG_REGS
293         default 2 if 44x
294         default 0
295 
296 config PPC_ADV_DEBUG_DAC_RANGE
297         bool
298         depends on PPC_ADV_DEBUG_REGS && 44x
299         default y
300 
301 config PPC_EMULATE_SSTEP
302         bool
303         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
304 
305 config ZONE_DMA32
306         bool
307         default y if PPC64
308 
309 config PGTABLE_LEVELS
310         int
311         default 2 if !PPC64
312         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
313         default 4
314 
315 source "init/Kconfig"
316 
317 source "kernel/Kconfig.freezer"
318 
319 source "arch/powerpc/sysdev/Kconfig"
320 source "arch/powerpc/platforms/Kconfig"
321 
322 menu "Kernel options"
323 
324 config HIGHMEM
325         bool "High memory support"
326         depends on PPC32
327 
328 source kernel/Kconfig.hz
329 source kernel/Kconfig.preempt
330 source "fs/Kconfig.binfmt"
331 
332 config HUGETLB_PAGE_SIZE_VARIABLE
333         bool
334         depends on HUGETLB_PAGE
335         default y
336 
337 config MATH_EMULATION
338         bool "Math emulation"
339         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
340         ---help---
341           Some PowerPC chips designed for embedded applications do not have
342           a floating-point unit and therefore do not implement the
343           floating-point instructions in the PowerPC instruction set.  If you
344           say Y here, the kernel will include code to emulate a floating-point
345           unit, which will allow programs that use floating-point
346           instructions to run.
347 
348           This is also useful to emulate missing (optional) instructions
349           such as fsqrt on cores that do have an FPU but do not implement
350           them (such as Freescale BookE).
351 
352 choice
353         prompt "Math emulation options"
354         default MATH_EMULATION_FULL
355         depends on MATH_EMULATION
356 
357 config  MATH_EMULATION_FULL
358         bool "Emulate all the floating point instructions"
359         ---help---
360           Select this option will enable the kernel to support to emulate
361           all the floating point instructions. If your SoC doesn't have
362           a FPU, you should select this.
363 
364 config MATH_EMULATION_HW_UNIMPLEMENTED
365         bool "Just emulate the FPU unimplemented instructions"
366         ---help---
367           Select this if you know there does have a hardware FPU on your
368           SoC, but some floating point instructions are not implemented by that.
369 
370 endchoice
371 
372 config PPC_TRANSACTIONAL_MEM
373        bool "Transactional Memory support for POWERPC"
374        depends on PPC_BOOK3S_64
375        depends on SMP
376        select ALTIVEC
377        select VSX
378        default n
379        ---help---
380          Support user-mode Transactional Memory on POWERPC.
381 
382 config DISABLE_MPROFILE_KERNEL
383         bool "Disable use of mprofile-kernel for kernel tracing"
384         depends on PPC64 && CPU_LITTLE_ENDIAN
385         default y
386         help
387           Selecting this options disables use of the mprofile-kernel ABI for
388           kernel tracing. That will cause options such as live patching
389           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
390           be disabled also.
391 
392           If you have a toolchain which supports mprofile-kernel, then you can
393           enable this. Otherwise leave it disabled. If you're not sure, say
394           "N".
395 
396 config MPROFILE_KERNEL
397         depends on PPC64 && CPU_LITTLE_ENDIAN
398         def_bool !DISABLE_MPROFILE_KERNEL
399 
400 config IOMMU_HELPER
401         def_bool PPC64
402 
403 config SWIOTLB
404         bool "SWIOTLB support"
405         default n
406         select IOMMU_HELPER
407         ---help---
408           Support for IO bounce buffering for systems without an IOMMU.
409           This allows us to DMA to the full physical address space on
410           platforms where the size of a physical address is larger
411           than the bus address.  Not all platforms support this.
412 
413 config HOTPLUG_CPU
414         bool "Support for enabling/disabling CPUs"
415         depends on SMP && (PPC_PSERIES || \
416         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
417         ---help---
418           Say Y here to be able to disable and re-enable individual
419           CPUs at runtime on SMP machines.
420 
421           Say N if you are unsure.
422 
423 config ARCH_CPU_PROBE_RELEASE
424         def_bool y
425         depends on HOTPLUG_CPU
426 
427 config ARCH_ENABLE_MEMORY_HOTPLUG
428         def_bool y
429 
430 config ARCH_HAS_WALK_MEMORY
431         def_bool y
432 
433 config ARCH_ENABLE_MEMORY_HOTREMOVE
434         def_bool y
435 
436 config PPC64_SUPPORTS_MEMORY_FAILURE
437         bool "Add support for memory hwpoison"
438         depends on PPC_BOOK3S_64
439         default "y" if PPC_POWERNV
440         select ARCH_SUPPORTS_MEMORY_FAILURE
441 
442 config KEXEC
443         bool "kexec system call"
444         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
445         select KEXEC_CORE
446         help
447           kexec is a system call that implements the ability to shutdown your
448           current kernel, and to start another kernel.  It is like a reboot
449           but it is independent of the system firmware.   And like a reboot
450           you can start any kernel with it, not just Linux.
451 
452           The name comes from the similarity to the exec system call.
453 
454           It is an ongoing process to be certain the hardware in a machine
455           is properly shutdown, so do not be surprised if this code does not
456           initially work for you.  As of this writing the exact hardware
457           interface is strongly in flux, so no good recommendation can be
458           made.
459 
460 config CRASH_DUMP
461         bool "Build a kdump crash kernel"
462         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
463         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
464         help
465           Build a kernel suitable for use as a kdump capture kernel.
466           The same kernel binary can be used as production kernel and dump
467           capture kernel.
468 
469 config FA_DUMP
470         bool "Firmware-assisted dump"
471         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
472         help
473           A robust mechanism to get reliable kernel crash dump with
474           assistance from firmware. This approach does not use kexec,
475           instead firmware assists in booting the kdump kernel
476           while preserving memory contents. Firmware-assisted dump
477           is meant to be a kdump replacement offering robustness and
478           speed not possible without system firmware assistance.
479 
480           If unsure, say "N"
481 
482 config IRQ_ALL_CPUS
483         bool "Distribute interrupts on all CPUs by default"
484         depends on SMP
485         help
486           This option gives the kernel permission to distribute IRQs across
487           multiple CPUs.  Saying N here will route all IRQs to the first
488           CPU.  Generally saying Y is safe, although some problems have been
489           reported with SMP Power Macintoshes with this option enabled.
490 
491 config NUMA
492         bool "NUMA support"
493         depends on PPC64
494         default y if SMP && PPC_PSERIES
495 
496 config NODES_SHIFT
497         int
498         default "8" if PPC64
499         default "4"
500         depends on NEED_MULTIPLE_NODES
501 
502 config USE_PERCPU_NUMA_NODE_ID
503         def_bool y
504         depends on NUMA
505 
506 config HAVE_MEMORYLESS_NODES
507         def_bool y
508         depends on NUMA
509 
510 config ARCH_SELECT_MEMORY_MODEL
511         def_bool y
512         depends on PPC64
513 
514 config ARCH_FLATMEM_ENABLE
515         def_bool y
516         depends on (PPC64 && !NUMA) || PPC32
517 
518 config ARCH_SPARSEMEM_ENABLE
519         def_bool y
520         depends on PPC64
521         select SPARSEMEM_VMEMMAP_ENABLE
522 
523 config ARCH_SPARSEMEM_DEFAULT
524         def_bool y
525         depends on (SMP && PPC_PSERIES) || PPC_PS3
526 
527 config SYS_SUPPORTS_HUGETLBFS
528         bool
529 
530 source "mm/Kconfig"
531 
532 config ARCH_MEMORY_PROBE
533         def_bool y
534         depends on MEMORY_HOTPLUG
535 
536 # Some NUMA nodes have memory ranges that span
537 # other nodes.  Even though a pfn is valid and
538 # between a node's start and end pfns, it may not
539 # reside on that node.  See memmap_init_zone()
540 # for details.
541 config NODES_SPAN_OTHER_NODES
542         def_bool y
543         depends on NEED_MULTIPLE_NODES
544 
545 config STDBINUTILS
546         bool "Using standard binutils settings"
547         depends on 44x
548         default y
549         help
550           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
551           Note, that kernel will be able to run only those applications,
552           which had been compiled using binutils later than 2.17.50.0.3 with
553           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
554           the older binutils, you can patch them with a trivial patch, which
555           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
556 
557 choice
558         prompt "Page size"
559         default PPC_4K_PAGES
560         help
561           Select the kernel logical page size. Increasing the page size
562           will reduce software overhead at each page boundary, allow
563           hardware prefetch mechanisms to be more effective, and allow
564           larger dma transfers increasing IO efficiency and reducing
565           overhead. However the utilization of memory will increase.
566           For example, each cached file will using a multiple of the
567           page size to hold its contents and the difference between the
568           end of file and the end of page is wasted.
569 
570           Some dedicated systems, such as software raid serving with
571           accelerated calculations, have shown significant increases.
572 
573           If you configure a 64 bit kernel for 64k pages but the
574           processor does not support them, then the kernel will simulate
575           them with 4k pages, loading them on demand, but with the
576           reduced software overhead and larger internal fragmentation.
577           For the 32 bit kernel, a large page option will not be offered
578           unless it is supported by the configured processor.
579 
580           If unsure, choose 4K_PAGES.
581 
582 config PPC_4K_PAGES
583         bool "4k page size"
584         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
585 
586 config PPC_16K_PAGES
587         bool "16k page size"
588         depends on 44x || PPC_8xx
589 
590 config PPC_64K_PAGES
591         bool "64k page size"
592         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
593         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
594 
595 config PPC_256K_PAGES
596         bool "256k page size"
597         depends on 44x && !STDBINUTILS
598         help
599           Make the page size 256k.
600 
601           As the ELF standard only requires alignment to support page
602           sizes up to 64k, you will need to compile all of your user
603           space applications with a non-standard binutils settings
604           (see the STDBINUTILS description for details).
605 
606           Say N unless you know what you are doing.
607 
608 endchoice
609 
610 config FORCE_MAX_ZONEORDER
611         int "Maximum zone order"
612         range 8 9 if PPC64 && PPC_64K_PAGES
613         default "9" if PPC64 && PPC_64K_PAGES
614         range 9 13 if PPC64 && !PPC_64K_PAGES
615         default "13" if PPC64 && !PPC_64K_PAGES
616         range 9 64 if PPC32 && PPC_16K_PAGES
617         default "9" if PPC32 && PPC_16K_PAGES
618         range 7 64 if PPC32 && PPC_64K_PAGES
619         default "7" if PPC32 && PPC_64K_PAGES
620         range 5 64 if PPC32 && PPC_256K_PAGES
621         default "5" if PPC32 && PPC_256K_PAGES
622         range 11 64
623         default "11"
624         help
625           The kernel memory allocator divides physically contiguous memory
626           blocks into "zones", where each zone is a power of two number of
627           pages.  This option selects the largest power of two that the kernel
628           keeps in the memory allocator.  If you need to allocate very large
629           blocks of physically contiguous memory, then you may need to
630           increase this value.
631 
632           This config option is actually maximum order plus one. For example,
633           a value of 11 means that the largest free memory block is 2^10 pages.
634 
635           The page size is not necessarily 4KB.  For example, on 64-bit
636           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
637           this in mind when choosing a value for this option.
638 
639 config PPC_SUBPAGE_PROT
640         bool "Support setting protections for 4k subpages"
641         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
642         help
643           This option adds support for a system call to allow user programs
644           to set access permissions (read/write, readonly, or no access)
645           on the 4k subpages of each 64k page.
646 
647 config PPC_COPRO_BASE
648         bool
649         default n
650 
651 config SCHED_SMT
652         bool "SMT (Hyperthreading) scheduler support"
653         depends on PPC64 && SMP
654         help
655           SMT scheduler support improves the CPU scheduler's decision making
656           when dealing with POWER5 cpus at a cost of slightly increased
657           overhead in some places. If unsure say N here.
658 
659 config PPC_DENORMALISATION
660         bool "PowerPC denormalisation exception handling"
661         depends on PPC_BOOK3S_64
662         default "y" if PPC_POWERNV
663         ---help---
664           Add support for handling denormalisation of single precision
665           values.  Useful for bare metal only.  If unsure say Y here.
666 
667 config CMDLINE_BOOL
668         bool "Default bootloader kernel arguments"
669 
670 config CMDLINE
671         string "Initial kernel command string"
672         depends on CMDLINE_BOOL
673         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
674         help
675           On some platforms, there is currently no way for the boot loader to
676           pass arguments to the kernel. For these platforms, you can supply
677           some command-line options at build time by entering them here.  In
678           most cases you will need to specify the root device here.
679 
680 config CMDLINE_FORCE
681         bool "Always use the default kernel command string"
682         depends on CMDLINE_BOOL
683         help
684           Always use the default kernel command string, even if the boot
685           loader passes other arguments to the kernel.
686           This is useful if you cannot or don't want to change the
687           command-line options your boot loader passes to the kernel.
688 
689 config EXTRA_TARGETS
690         string "Additional default image types"
691         help
692           List additional targets to be built by the bootwrapper here (separated
693           by spaces).  This is useful for targets that depend of device tree
694           files in the .dts directory.
695 
696           Targets in this list will be build as part of the default build
697           target, or when the user does a 'make zImage' or a
698           'make zImage.initrd'.
699 
700           If unsure, leave blank
701 
702 config ARCH_WANTS_FREEZER_CONTROL
703         def_bool y
704         depends on ADB_PMU
705 
706 source kernel/power/Kconfig
707 
708 config SECCOMP
709         bool "Enable seccomp to safely compute untrusted bytecode"
710         depends on PROC_FS
711         default y
712         help
713           This kernel feature is useful for number crunching applications
714           that may need to compute untrusted bytecode during their
715           execution. By using pipes or other transports made available to
716           the process as file descriptors supporting the read/write
717           syscalls, it's possible to isolate those applications in
718           their own address space using seccomp. Once seccomp is
719           enabled via /proc/<pid>/seccomp, it cannot be disabled
720           and the task is only allowed to execute a few safe syscalls
721           defined by each seccomp mode.
722 
723           If unsure, say Y. Only embedded should say N here.
724 
725 endmenu
726 
727 config ISA_DMA_API
728         bool
729         default PCI
730 
731 menu "Bus options"
732 
733 config ISA
734         bool "Support for ISA-bus hardware"
735         depends on PPC_CHRP
736         select PPC_I8259
737         help
738           Find out whether you have ISA slots on your motherboard.  ISA is the
739           name of a bus system, i.e. the way the CPU talks to the other stuff
740           inside your box.  If you have an Apple machine, say N here; if you
741           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
742           embedded board, consult your board documentation.
743 
744 config ZONE_DMA
745         bool
746         default y
747 
748 config NEED_DMA_MAP_STATE
749         def_bool (PPC64 || NOT_COHERENT_CACHE)
750 
751 config NEED_SG_DMA_LENGTH
752         def_bool y
753 
754 config GENERIC_ISA_DMA
755         bool
756         depends on ISA_DMA_API
757         default y
758 
759 config PPC_INDIRECT_PCI
760         bool
761         depends on PCI
762         default y if 40x || 44x
763         default n
764 
765 config EISA
766         bool
767 
768 config SBUS
769         bool
770 
771 config FSL_SOC
772         bool
773 
774 config FSL_PCI
775         bool
776         select PPC_INDIRECT_PCI
777         select PCI_QUIRKS
778 
779 config FSL_PMC
780         bool
781         default y
782         depends on SUSPEND && (PPC_85xx || PPC_86xx)
783         help
784           Freescale MPC85xx/MPC86xx power management controller support
785           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
786 
787 config PPC4xx_CPM
788         bool
789         default y
790         depends on SUSPEND && (44x || 40x)
791         help
792           PPC4xx Clock Power Management (CPM) support (suspend/resume).
793           It also enables support for two different idle states (idle-wait
794           and idle-doze).
795 
796 config 4xx_SOC
797         bool
798 
799 config FSL_LBC
800         bool "Freescale Local Bus support"
801         help
802           Enables reporting of errors from the Freescale local bus
803           controller.  Also contains some common code used by
804           drivers for specific local bus peripherals.
805 
806 config FSL_GTM
807         bool
808         depends on PPC_83xx || QUICC_ENGINE || CPM2
809         help
810           Freescale General-purpose Timers support
811 
812 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
813 config MCA
814         bool
815 
816 # Platforms that what PCI turned unconditionally just do select PCI
817 # in their config node.  Platforms that want to choose at config
818 # time should select PPC_PCI_CHOICE
819 config PPC_PCI_CHOICE
820         bool
821 
822 config PCI
823         bool "PCI support" if PPC_PCI_CHOICE
824         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
825                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
826         default PCI_QSPAN if !4xx && !CPM2 && 8xx
827         select GENERIC_PCI_IOMAP
828         help
829           Find out whether your system includes a PCI bus. PCI is the name of
830           a bus system, i.e. the way the CPU talks to the other stuff inside
831           your box.  If you say Y here, the kernel will include drivers and
832           infrastructure code to support PCI bus devices.
833 
834 config PCI_DOMAINS
835         def_bool PCI
836 
837 config PCI_SYSCALL
838         def_bool PCI
839 
840 config PCI_QSPAN
841         bool "QSpan PCI"
842         depends on !4xx && !CPM2 && 8xx
843         select PPC_I8259
844         help
845           Say Y here if you have a system based on a Motorola 8xx-series
846           embedded processor with a QSPAN PCI interface, otherwise say N.
847 
848 config PCI_8260
849         bool
850         depends on PCI && 8260
851         select PPC_INDIRECT_PCI
852         default y
853 
854 source "drivers/pci/Kconfig"
855 
856 source "drivers/pcmcia/Kconfig"
857 
858 config HAS_RAPIDIO
859         bool
860         default n
861 
862 config RAPIDIO
863         tristate "RapidIO support"
864         depends on HAS_RAPIDIO || PCI
865         help
866           If you say Y here, the kernel will include drivers and
867           infrastructure code to support RapidIO interconnect devices.
868 
869 config FSL_RIO
870         bool "Freescale Embedded SRIO Controller support"
871         depends on RAPIDIO = y && HAS_RAPIDIO
872         default "n"
873         ---help---
874           Include support for RapidIO controller on Freescale embedded
875           processors (MPC8548, MPC8641, etc).
876 
877 source "drivers/rapidio/Kconfig"
878 
879 endmenu
880 
881 config NONSTATIC_KERNEL
882         bool
883         default n
884 
885 menu "Advanced setup"
886         depends on PPC32
887 
888 config ADVANCED_OPTIONS
889         bool "Prompt for advanced kernel configuration options"
890         help
891           This option will enable prompting for a variety of advanced kernel
892           configuration options.  These options can cause the kernel to not
893           work if they are set incorrectly, but can be used to optimize certain
894           aspects of kernel memory management.
895 
896           Unless you know what you are doing, say N here.
897 
898 comment "Default settings for advanced configuration options are used"
899         depends on !ADVANCED_OPTIONS
900 
901 config LOWMEM_SIZE_BOOL
902         bool "Set maximum low memory"
903         depends on ADVANCED_OPTIONS
904         help
905           This option allows you to set the maximum amount of memory which
906           will be used as "low memory", that is, memory which the kernel can
907           access directly, without having to set up a kernel virtual mapping.
908           This can be useful in optimizing the layout of kernel virtual
909           memory.
910 
911           Say N here unless you know what you are doing.
912 
913 config LOWMEM_SIZE
914         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
915         default "0x30000000"
916 
917 config LOWMEM_CAM_NUM_BOOL
918         bool "Set number of CAMs to use to map low memory"
919         depends on ADVANCED_OPTIONS && FSL_BOOKE
920         help
921           This option allows you to set the maximum number of CAM slots that
922           will be used to map low memory.  There are a limited number of slots
923           available and even more limited number that will fit in the L1 MMU.
924           However, using more entries will allow mapping more low memory.  This
925           can be useful in optimizing the layout of kernel virtual memory.
926 
927           Say N here unless you know what you are doing.
928 
929 config LOWMEM_CAM_NUM
930         depends on FSL_BOOKE
931         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
932         default 3
933 
934 config DYNAMIC_MEMSTART
935         bool "Enable page aligned dynamic load address for kernel"
936         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
937         select NONSTATIC_KERNEL
938         help
939           This option enables the kernel to be loaded at any page aligned
940           physical address. The kernel creates a mapping from KERNELBASE to 
941           the address where the kernel is loaded. The page size here implies
942           the TLB page size of the mapping for kernel on the particular platform.
943           Please refer to the init code for finding the TLB page size.
944 
945           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
946           kernel image, where the only restriction is the page aligned kernel
947           load address. When this option is enabled, the compile time physical 
948           address CONFIG_PHYSICAL_START is ignored.
949 
950           This option is overridden by CONFIG_RELOCATABLE
951 
952 config RELOCATABLE
953         bool "Build a relocatable kernel"
954         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
955         select NONSTATIC_KERNEL
956         help
957           This builds a kernel image that is capable of running at the
958           location the kernel is loaded at, without any alignment restrictions.
959           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
960 
961           One use is for the kexec on panic case where the recovery kernel
962           must live at a different physical address than the primary
963           kernel.
964 
965           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
966           it has been loaded at and the compile time physical addresses
967           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
968           setting can still be useful to bootwrappers that need to know the
969           load address of the kernel (eg. u-boot/mkimage).
970 
971 config RELOCATABLE_PPC32
972         def_bool y
973         depends on PPC32 && RELOCATABLE
974 
975 config PAGE_OFFSET_BOOL
976         bool "Set custom page offset address"
977         depends on ADVANCED_OPTIONS
978         help
979           This option allows you to set the kernel virtual address at which
980           the kernel will map low memory.  This can be useful in optimizing
981           the virtual memory layout of the system.
982 
983           Say N here unless you know what you are doing.
984 
985 config PAGE_OFFSET
986         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
987         default "0xc0000000"
988 
989 config KERNEL_START_BOOL
990         bool "Set custom kernel base address"
991         depends on ADVANCED_OPTIONS
992         help
993           This option allows you to set the kernel virtual address at which
994           the kernel will be loaded.  Normally this should match PAGE_OFFSET
995           however there are times (like kdump) that one might not want them
996           to be the same.
997 
998           Say N here unless you know what you are doing.
999 
1000 config KERNEL_START
1001         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1002         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1003         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1004         default "0xc0000000"
1005 
1006 config PHYSICAL_START_BOOL
1007         bool "Set physical address where the kernel is loaded"
1008         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1009         help
1010           This gives the physical address where the kernel is loaded.
1011 
1012           Say N here unless you know what you are doing.
1013 
1014 config PHYSICAL_START
1015         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1016         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1017         default "0x00000000"
1018 
1019 config PHYSICAL_ALIGN
1020         hex
1021         default "0x04000000" if FSL_BOOKE
1022         help
1023           This value puts the alignment restrictions on physical address
1024           where kernel is loaded and run from. Kernel is compiled for an
1025           address which meets above alignment restriction.
1026 
1027 config TASK_SIZE_BOOL
1028         bool "Set custom user task size"
1029         depends on ADVANCED_OPTIONS
1030         help
1031           This option allows you to set the amount of virtual address space
1032           allocated to user tasks.  This can be useful in optimizing the
1033           virtual memory layout of the system.
1034 
1035           Say N here unless you know what you are doing.
1036 
1037 config TASK_SIZE
1038         hex "Size of user task space" if TASK_SIZE_BOOL
1039         default "0x80000000" if PPC_8xx
1040         default "0xc0000000"
1041 
1042 config CONSISTENT_SIZE_BOOL
1043         bool "Set custom consistent memory pool size"
1044         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1045         help
1046           This option allows you to set the size of the
1047           consistent memory pool.  This pool of virtual memory
1048           is used to make consistent memory allocations.
1049 
1050 config CONSISTENT_SIZE
1051         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1052         default "0x00200000" if NOT_COHERENT_CACHE
1053 
1054 config PIN_TLB
1055         bool "Pinned Kernel TLBs (860 ONLY)"
1056         depends on ADVANCED_OPTIONS && 8xx
1057 endmenu
1058 
1059 if PPC64
1060 config RELOCATABLE
1061         bool "Build a relocatable kernel"
1062         depends on !COMPILE_TEST
1063         select NONSTATIC_KERNEL
1064         help
1065           This builds a kernel image that is capable of running anywhere
1066           in the RMA (real memory area) at any 16k-aligned base address.
1067           The kernel is linked as a position-independent executable (PIE)
1068           and contains dynamic relocations which are processed early
1069           in the bootup process.
1070 
1071           One use is for the kexec on panic case where the recovery kernel
1072           must live at a different physical address than the primary
1073           kernel.
1074 
1075 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1076 config PAGE_OFFSET
1077         hex
1078         default "0xc000000000000000"
1079 config KERNEL_START
1080         hex
1081         default "0xc000000000000000"
1082 config PHYSICAL_START
1083         hex
1084         default "0x00000000"
1085 endif
1086 
1087 config  ARCH_RANDOM
1088         def_bool n
1089 
1090 source "net/Kconfig"
1091 
1092 source "drivers/Kconfig"
1093 
1094 source "fs/Kconfig"
1095 
1096 source "lib/Kconfig"
1097 
1098 source "arch/powerpc/Kconfig.debug"
1099 
1100 source "security/Kconfig"
1101 
1102 config KEYS_COMPAT
1103         bool
1104         depends on COMPAT && KEYS
1105         default y
1106 
1107 source "crypto/Kconfig"
1108 
1109 config PPC_LIB_RHEAP
1110         bool
1111 
1112 source "arch/powerpc/kvm/Kconfig"
1113 
1114 source "kernel/livepatch/Kconfig"

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