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

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