1source "arch/powerpc/platforms/Kconfig.cputype"
2
3config PPC32
4 bool
5 default y if !PPC64
6
7config 32BIT
8 bool
9 default y if PPC32
10
11config 64BIT
12 bool
13 default y if PPC64
14
15config ARCH_PHYS_ADDR_T_64BIT
16 def_bool PPC64 || PHYS_64BIT
17
18config ARCH_DMA_ADDR_T_64BIT
19 def_bool ARCH_PHYS_ADDR_T_64BIT
20
21config MMU
22 bool
23 default y
24
25config HAVE_SETUP_PER_CPU_AREA
26 def_bool PPC64
27
28config NEED_PER_CPU_EMBED_FIRST_CHUNK
29 def_bool PPC64
30
31config NR_IRQS
32 int "Number of virtual interrupt numbers"
33 range 32 32768
34 default "512"
35 help
36 This defines the number of virtual interrupt numbers the kernel
37 can manage. Virtual interrupt numbers are what you see in
38 /proc/interrupts. If you configure your system to have too few,
39 drivers will fail to load or worse - handle with care.
40
41config STACKTRACE_SUPPORT
42 bool
43 default y
44
45config TRACE_IRQFLAGS_SUPPORT
46 bool
47 default y
48
49config LOCKDEP_SUPPORT
50 bool
51 default y
52
53config RWSEM_GENERIC_SPINLOCK
54 bool
55
56config RWSEM_XCHGADD_ALGORITHM
57 bool
58 default y
59
60config GENERIC_LOCKBREAK
61 bool
62 default y
63 depends on SMP && PREEMPT
64
65config ARCH_HAS_ILOG2_U32
66 bool
67 default y
68
69config ARCH_HAS_ILOG2_U64
70 bool
71 default y if 64BIT
72
73config GENERIC_HWEIGHT
74 bool
75 default y
76
77config ARCH_HAS_DMA_SET_COHERENT_MASK
78 bool
79
80config PPC
81 bool
82 default y
83 select ARCH_MIGHT_HAVE_PC_PARPORT
84 select ARCH_MIGHT_HAVE_PC_SERIO
85 select BINFMT_ELF
86 select ARCH_HAS_ELF_RANDOMIZE
87 select OF
88 select OF_EARLY_FLATTREE
89 select OF_RESERVED_MEM
90 select HAVE_FTRACE_MCOUNT_RECORD
91 select HAVE_DYNAMIC_FTRACE
92 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
93 select HAVE_FUNCTION_TRACER
94 select HAVE_FUNCTION_GRAPH_TRACER
95 select SYSCTL_EXCEPTION_TRACE
96 select VIRT_TO_BUS if !PPC64
97 select HAVE_IDE
98 select HAVE_IOREMAP_PROT
99 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
100 select HAVE_KPROBES
101 select HAVE_ARCH_KGDB
102 select HAVE_KRETPROBES
103 select HAVE_ARCH_TRACEHOOK
104 select HAVE_MEMBLOCK
105 select HAVE_MEMBLOCK_NODE_MAP
106 select HAVE_DMA_API_DEBUG
107 select HAVE_OPROFILE
108 select HAVE_DEBUG_KMEMLEAK
109 select ARCH_HAS_SG_CHAIN
110 select GENERIC_ATOMIC64 if PPC32
111 select HAVE_PERF_EVENTS
112 select HAVE_PERF_REGS
113 select HAVE_PERF_USER_STACK_DUMP
114 select HAVE_REGS_AND_STACK_ACCESS_API
115 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
116 select ARCH_WANT_IPC_PARSE_VERSION
117 select SPARSE_IRQ
118 select IRQ_DOMAIN
119 select GENERIC_IRQ_SHOW
120 select GENERIC_IRQ_SHOW_LEVEL
121 select IRQ_FORCED_THREADING
122 select HAVE_RCU_TABLE_FREE if SMP
123 select HAVE_SYSCALL_TRACEPOINTS
124 select HAVE_CBPF_JIT if !PPC64
125 select HAVE_EBPF_JIT if PPC64
126 select HAVE_ARCH_JUMP_LABEL
127 select ARCH_HAVE_NMI_SAFE_CMPXCHG
128 select ARCH_HAS_GCOV_PROFILE_ALL
129 select GENERIC_SMP_IDLE_THREAD
130 select GENERIC_CMOS_UPDATE
131 select GENERIC_TIME_VSYSCALL_OLD
132 select GENERIC_CLOCKEVENTS
133 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
134 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
135 select GENERIC_STRNCPY_FROM_USER
136 select GENERIC_STRNLEN_USER
137 select HAVE_MOD_ARCH_SPECIFIC
138 select MODULES_USE_ELF_RELA
139 select CLONE_BACKWARDS
140 select ARCH_USE_BUILTIN_BSWAP
141 select OLD_SIGSUSPEND
142 select OLD_SIGACTION if PPC32
143 select HAVE_DEBUG_STACKOVERFLOW
144 select HAVE_IRQ_EXIT_ON_IRQ_STACK
145 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
146 select HAVE_ARCH_AUDITSYSCALL
147 select ARCH_SUPPORTS_ATOMIC_RMW
148 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
149 select NO_BOOTMEM
150 select HAVE_GENERIC_RCU_GUP
151 select HAVE_PERF_EVENTS_NMI if PPC64
152 select HAVE_NMI if PERF_EVENTS
153 select EDAC_SUPPORT
154 select EDAC_ATOMIC_SCRUB
155 select ARCH_HAS_DMA_SET_COHERENT_MASK
156 select ARCH_HAS_DEVMEM_IS_ALLOWED
157 select HAVE_ARCH_SECCOMP_FILTER
158 select ARCH_HAS_UBSAN_SANITIZE_ALL
159 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
160 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
161 select GENERIC_CPU_AUTOPROBE
162 select HAVE_VIRT_CPU_ACCOUNTING
163 select HAVE_ARCH_HARDENED_USERCOPY
164 select HAVE_KERNEL_GZIP
165
166config GENERIC_CSUM
167 def_bool CPU_LITTLE_ENDIAN
168
169config EARLY_PRINTK
170 bool
171 default y
172
173config PANIC_TIMEOUT
174 int
175 default 180
176
177config COMPAT
178 bool
179 default y if PPC64
180 select COMPAT_BINFMT_ELF
181 select ARCH_WANT_OLD_COMPAT_IPC
182 select COMPAT_OLD_SIGACTION
183
184config SYSVIPC_COMPAT
185 bool
186 depends on COMPAT && SYSVIPC
187 default y
188
189
190config GENERIC_NVRAM
191 bool
192 default y if PPC32
193
194config SCHED_OMIT_FRAME_POINTER
195 bool
196 default y
197
198config ARCH_MAY_HAVE_PC_FDC
199 bool
200 default PCI
201
202config PPC_UDBG_16550
203 bool
204 default n
205
206config GENERIC_TBSYNC
207 bool
208 default y if PPC32 && SMP
209 default n
210
211config AUDIT_ARCH
212 bool
213 default y
214
215config GENERIC_BUG
216 bool
217 default y
218 depends on BUG
219
220config SYS_SUPPORTS_APM_EMULATION
221 default y if PMAC_APM_EMU
222 bool
223
224config EPAPR_BOOT
225 bool
226 help
227 Used to allow a board to specify it wants an ePAPR compliant wrapper.
228 default n
229
230config DEFAULT_UIMAGE
231 bool
232 help
233 Used to allow a board to specify it wants a uImage built by default
234 default n
235
236config ARCH_HIBERNATION_POSSIBLE
237 bool
238 default y
239
240config ARCH_SUSPEND_POSSIBLE
241 def_bool y
242 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
243 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
244 || 44x || 40x
245
246config PPC_DCR_NATIVE
247 bool
248 default n
249
250config PPC_DCR_MMIO
251 bool
252 default n
253
254config PPC_DCR
255 bool
256 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
257 default y
258
259config PPC_OF_PLATFORM_PCI
260 bool
261 depends on PCI
262 depends on PPC64
263 default n
264
265config ARCH_SUPPORTS_DEBUG_PAGEALLOC
266 depends on PPC32 || PPC_STD_MMU_64
267 def_bool y
268
269config ARCH_SUPPORTS_UPROBES
270 def_bool y
271
272config PPC_ADV_DEBUG_REGS
273 bool
274 depends on 40x || BOOKE
275 default y
276
277config PPC_ADV_DEBUG_IACS
278 int
279 depends on PPC_ADV_DEBUG_REGS
280 default 4 if 44x
281 default 2
282
283config PPC_ADV_DEBUG_DACS
284 int
285 depends on PPC_ADV_DEBUG_REGS
286 default 2
287
288config PPC_ADV_DEBUG_DVCS
289 int
290 depends on PPC_ADV_DEBUG_REGS
291 default 2 if 44x
292 default 0
293
294config PPC_ADV_DEBUG_DAC_RANGE
295 bool
296 depends on PPC_ADV_DEBUG_REGS && 44x
297 default y
298
299config PPC_EMULATE_SSTEP
300 bool
301 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
302
303config ZONE_DMA32
304 bool
305 default y if PPC64
306
307config PGTABLE_LEVELS
308 int
309 default 2 if !PPC64
310 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
311 default 4
312
313source "init/Kconfig"
314
315source "kernel/Kconfig.freezer"
316
317source "arch/powerpc/sysdev/Kconfig"
318source "arch/powerpc/platforms/Kconfig"
319
320menu "Kernel options"
321
322config HIGHMEM
323 bool "High memory support"
324 depends on PPC32
325
326source kernel/Kconfig.hz
327source kernel/Kconfig.preempt
328source "fs/Kconfig.binfmt"
329
330config HUGETLB_PAGE_SIZE_VARIABLE
331 bool
332 depends on HUGETLB_PAGE
333 default y
334
335config MATH_EMULATION
336 bool "Math emulation"
337 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
338 ---help---
339 Some PowerPC chips designed for embedded applications do not have
340 a floating-point unit and therefore do not implement the
341 floating-point instructions in the PowerPC instruction set. If you
342 say Y here, the kernel will include code to emulate a floating-point
343 unit, which will allow programs that use floating-point
344 instructions to run.
345
346 This is also useful to emulate missing (optional) instructions
347 such as fsqrt on cores that do have an FPU but do not implement
348 them (such as Freescale BookE).
349
350choice
351 prompt "Math emulation options"
352 default MATH_EMULATION_FULL
353 depends on MATH_EMULATION
354
355config MATH_EMULATION_FULL
356 bool "Emulate all the floating point instructions"
357 ---help---
358 Select this option will enable the kernel to support to emulate
359 all the floating point instructions. If your SoC doesn't have
360 a FPU, you should select this.
361
362config MATH_EMULATION_HW_UNIMPLEMENTED
363 bool "Just emulate the FPU unimplemented instructions"
364 ---help---
365 Select this if you know there does have a hardware FPU on your
366 SoC, but some floating point instructions are not implemented by that.
367
368endchoice
369
370config PPC_TRANSACTIONAL_MEM
371 bool "Transactional Memory support for POWERPC"
372 depends on PPC_BOOK3S_64
373 depends on SMP
374 select ALTIVEC
375 select VSX
376 default n
377 ---help---
378 Support user-mode Transactional Memory on POWERPC.
379
380config DISABLE_MPROFILE_KERNEL
381 bool "Disable use of mprofile-kernel for kernel tracing"
382 depends on PPC64 && CPU_LITTLE_ENDIAN
383 default y
384 help
385 Selecting this options disables use of the mprofile-kernel ABI for
386 kernel tracing. That will cause options such as live patching
387 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
388 be disabled also.
389
390 If you have a toolchain which supports mprofile-kernel, then you can
391 enable this. Otherwise leave it disabled. If you're not sure, say
392 "N".
393
394config MPROFILE_KERNEL
395 depends on PPC64 && CPU_LITTLE_ENDIAN
396 def_bool !DISABLE_MPROFILE_KERNEL
397
398config IOMMU_HELPER
399 def_bool PPC64
400
401config SWIOTLB
402 bool "SWIOTLB support"
403 default n
404 select IOMMU_HELPER
405 ---help---
406 Support for IO bounce buffering for systems without an IOMMU.
407 This allows us to DMA to the full physical address space on
408 platforms where the size of a physical address is larger
409 than the bus address. Not all platforms support this.
410
411config HOTPLUG_CPU
412 bool "Support for enabling/disabling CPUs"
413 depends on SMP && (PPC_PSERIES || \
414 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
415 ---help---
416 Say Y here to be able to disable and re-enable individual
417 CPUs at runtime on SMP machines.
418
419 Say N if you are unsure.
420
421config ARCH_CPU_PROBE_RELEASE
422 def_bool y
423 depends on HOTPLUG_CPU
424
425config ARCH_ENABLE_MEMORY_HOTPLUG
426 def_bool y
427
428config ARCH_HAS_WALK_MEMORY
429 def_bool y
430
431config ARCH_ENABLE_MEMORY_HOTREMOVE
432 def_bool y
433
434config PPC64_SUPPORTS_MEMORY_FAILURE
435 bool "Add support for memory hwpoison"
436 depends on PPC_BOOK3S_64
437 default "y" if PPC_POWERNV
438 select ARCH_SUPPORTS_MEMORY_FAILURE
439
440config KEXEC
441 bool "kexec system call"
442 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
443 select KEXEC_CORE
444 help
445 kexec is a system call that implements the ability to shutdown your
446 current kernel, and to start another kernel. It is like a reboot
447 but it is independent of the system firmware. And like a reboot
448 you can start any kernel with it, not just Linux.
449
450 The name comes from the similarity to the exec system call.
451
452 It is an ongoing process to be certain the hardware in a machine
453 is properly shutdown, so do not be surprised if this code does not
454 initially work for you. As of this writing the exact hardware
455 interface is strongly in flux, so no good recommendation can be
456 made.
457
458config RELOCATABLE
459 bool "Build a relocatable kernel"
460 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
461 select NONSTATIC_KERNEL
462 help
463 This builds a kernel image that is capable of running at the
464 location the kernel is loaded at. For ppc32, there is no any
465 alignment restrictions, and this feature is a superset of
466 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
467 16k-aligned base address. The kernel is linked as a
468 position-independent executable (PIE) and contains dynamic relocations
469 which are processed early in the bootup process.
470
471 One use is for the kexec on panic case where the recovery kernel
472 must live at a different physical address than the primary
473 kernel.
474
475 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
476 it has been loaded at and the compile time physical addresses
477 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
478 setting can still be useful to bootwrappers that need to know the
479 load address of the kernel (eg. u-boot/mkimage).
480
481config CRASH_DUMP
482 bool "Build a kdump crash kernel"
483 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
484 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
485 help
486 Build a kernel suitable for use as a kdump capture kernel.
487 The same kernel binary can be used as production kernel and dump
488 capture kernel.
489
490config FA_DUMP
491 bool "Firmware-assisted dump"
492 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
493 help
494 A robust mechanism to get reliable kernel crash dump with
495 assistance from firmware. This approach does not use kexec,
496 instead firmware assists in booting the kdump kernel
497 while preserving memory contents. Firmware-assisted dump
498 is meant to be a kdump replacement offering robustness and
499 speed not possible without system firmware assistance.
500
501 If unsure, say "N"
502
503config IRQ_ALL_CPUS
504 bool "Distribute interrupts on all CPUs by default"
505 depends on SMP
506 help
507 This option gives the kernel permission to distribute IRQs across
508 multiple CPUs. Saying N here will route all IRQs to the first
509 CPU. Generally saying Y is safe, although some problems have been
510 reported with SMP Power Macintoshes with this option enabled.
511
512config NUMA
513 bool "NUMA support"
514 depends on PPC64
515 default y if SMP && PPC_PSERIES
516
517config NODES_SHIFT
518 int
519 default "8" if PPC64
520 default "4"
521 depends on NEED_MULTIPLE_NODES
522
523config USE_PERCPU_NUMA_NODE_ID
524 def_bool y
525 depends on NUMA
526
527config HAVE_MEMORYLESS_NODES
528 def_bool y
529 depends on NUMA
530
531config ARCH_SELECT_MEMORY_MODEL
532 def_bool y
533 depends on PPC64
534
535config ARCH_FLATMEM_ENABLE
536 def_bool y
537 depends on (PPC64 && !NUMA) || PPC32
538
539config ARCH_SPARSEMEM_ENABLE
540 def_bool y
541 depends on PPC64
542 select SPARSEMEM_VMEMMAP_ENABLE
543
544config ARCH_SPARSEMEM_DEFAULT
545 def_bool y
546 depends on (SMP && PPC_PSERIES) || PPC_PS3
547
548config SYS_SUPPORTS_HUGETLBFS
549 bool
550
551source "mm/Kconfig"
552
553config ARCH_MEMORY_PROBE
554 def_bool y
555 depends on MEMORY_HOTPLUG
556
557
558
559
560
561
562config NODES_SPAN_OTHER_NODES
563 def_bool y
564 depends on NEED_MULTIPLE_NODES
565
566config STDBINUTILS
567 bool "Using standard binutils settings"
568 depends on 44x
569 default y
570 help
571 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
572 Note, that kernel will be able to run only those applications,
573 which had been compiled using binutils later than 2.17.50.0.3 with
574 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
575 the older binutils, you can patch them with a trivial patch, which
576 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
577
578choice
579 prompt "Page size"
580 default PPC_4K_PAGES
581 help
582 Select the kernel logical page size. Increasing the page size
583 will reduce software overhead at each page boundary, allow
584 hardware prefetch mechanisms to be more effective, and allow
585 larger dma transfers increasing IO efficiency and reducing
586 overhead. However the utilization of memory will increase.
587 For example, each cached file will using a multiple of the
588 page size to hold its contents and the difference between the
589 end of file and the end of page is wasted.
590
591 Some dedicated systems, such as software raid serving with
592 accelerated calculations, have shown significant increases.
593
594 If you configure a 64 bit kernel for 64k pages but the
595 processor does not support them, then the kernel will simulate
596 them with 4k pages, loading them on demand, but with the
597 reduced software overhead and larger internal fragmentation.
598 For the 32 bit kernel, a large page option will not be offered
599 unless it is supported by the configured processor.
600
601 If unsure, choose 4K_PAGES.
602
603config PPC_4K_PAGES
604 bool "4k page size"
605 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
606
607config PPC_16K_PAGES
608 bool "16k page size"
609 depends on 44x || PPC_8xx
610
611config PPC_64K_PAGES
612 bool "64k page size"
613 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
614 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
615
616config PPC_256K_PAGES
617 bool "256k page size"
618 depends on 44x && !STDBINUTILS
619 help
620 Make the page size 256k.
621
622 As the ELF standard only requires alignment to support page
623 sizes up to 64k, you will need to compile all of your user
624 space applications with a non-standard binutils settings
625 (see the STDBINUTILS description for details).
626
627 Say N unless you know what you are doing.
628
629endchoice
630
631config FORCE_MAX_ZONEORDER
632 int "Maximum zone order"
633 range 8 9 if PPC64 && PPC_64K_PAGES
634 default "9" if PPC64 && PPC_64K_PAGES
635 range 13 13 if PPC64 && !PPC_64K_PAGES
636 default "13" if PPC64 && !PPC_64K_PAGES
637 range 9 64 if PPC32 && PPC_16K_PAGES
638 default "9" if PPC32 && PPC_16K_PAGES
639 range 7 64 if PPC32 && PPC_64K_PAGES
640 default "7" if PPC32 && PPC_64K_PAGES
641 range 5 64 if PPC32 && PPC_256K_PAGES
642 default "5" if PPC32 && PPC_256K_PAGES
643 range 11 64
644 default "11"
645 help
646 The kernel memory allocator divides physically contiguous memory
647 blocks into "zones", where each zone is a power of two number of
648 pages. This option selects the largest power of two that the kernel
649 keeps in the memory allocator. If you need to allocate very large
650 blocks of physically contiguous memory, then you may need to
651 increase this value.
652
653 This config option is actually maximum order plus one. For example,
654 a value of 11 means that the largest free memory block is 2^10 pages.
655
656 The page size is not necessarily 4KB. For example, on 64-bit
657 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
658 this in mind when choosing a value for this option.
659
660config PPC_SUBPAGE_PROT
661 bool "Support setting protections for 4k subpages"
662 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
663 help
664 This option adds support for a system call to allow user programs
665 to set access permissions (read/write, readonly, or no access)
666 on the 4k subpages of each 64k page.
667
668config PPC_COPRO_BASE
669 bool
670 default n
671
672config SCHED_SMT
673 bool "SMT (Hyperthreading) scheduler support"
674 depends on PPC64 && SMP
675 help
676 SMT scheduler support improves the CPU scheduler's decision making
677 when dealing with POWER5 cpus at a cost of slightly increased
678 overhead in some places. If unsure say N here.
679
680config PPC_DENORMALISATION
681 bool "PowerPC denormalisation exception handling"
682 depends on PPC_BOOK3S_64
683 default "y" if PPC_POWERNV
684 ---help---
685 Add support for handling denormalisation of single precision
686 values. Useful for bare metal only. If unsure say Y here.
687
688config CMDLINE_BOOL
689 bool "Default bootloader kernel arguments"
690
691config CMDLINE
692 string "Initial kernel command string"
693 depends on CMDLINE_BOOL
694 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
695 help
696 On some platforms, there is currently no way for the boot loader to
697 pass arguments to the kernel. For these platforms, you can supply
698 some command-line options at build time by entering them here. In
699 most cases you will need to specify the root device here.
700
701config CMDLINE_FORCE
702 bool "Always use the default kernel command string"
703 depends on CMDLINE_BOOL
704 help
705 Always use the default kernel command string, even if the boot
706 loader passes other arguments to the kernel.
707 This is useful if you cannot or don't want to change the
708 command-line options your boot loader passes to the kernel.
709
710config EXTRA_TARGETS
711 string "Additional default image types"
712 help
713 List additional targets to be built by the bootwrapper here (separated
714 by spaces). This is useful for targets that depend of device tree
715 files in the .dts directory.
716
717 Targets in this list will be build as part of the default build
718 target, or when the user does a 'make zImage' or a
719 'make zImage.initrd'.
720
721 If unsure, leave blank
722
723config ARCH_WANTS_FREEZER_CONTROL
724 def_bool y
725 depends on ADB_PMU
726
727source kernel/power/Kconfig
728
729config SECCOMP
730 bool "Enable seccomp to safely compute untrusted bytecode"
731 depends on PROC_FS
732 default y
733 help
734 This kernel feature is useful for number crunching applications
735 that may need to compute untrusted bytecode during their
736 execution. By using pipes or other transports made available to
737 the process as file descriptors supporting the read/write
738 syscalls, it's possible to isolate those applications in
739 their own address space using seccomp. Once seccomp is
740 enabled via /proc/<pid>/seccomp, it cannot be disabled
741 and the task is only allowed to execute a few safe syscalls
742 defined by each seccomp mode.
743
744 If unsure, say Y. Only embedded should say N here.
745
746endmenu
747
748config ISA_DMA_API
749 bool
750 default PCI
751
752menu "Bus options"
753
754config ISA
755 bool "Support for ISA-bus hardware"
756 depends on PPC_CHRP
757 select PPC_I8259
758 help
759 Find out whether you have ISA slots on your motherboard. ISA is the
760 name of a bus system, i.e. the way the CPU talks to the other stuff
761 inside your box. If you have an Apple machine, say N here; if you
762 have an IBM RS/6000 or pSeries machine, say Y. If you have an
763 embedded board, consult your board documentation.
764
765config ZONE_DMA
766 bool
767 default y
768
769config NEED_DMA_MAP_STATE
770 def_bool (PPC64 || NOT_COHERENT_CACHE)
771
772config NEED_SG_DMA_LENGTH
773 def_bool y
774
775config GENERIC_ISA_DMA
776 bool
777 depends on ISA_DMA_API
778 default y
779
780config PPC_INDIRECT_PCI
781 bool
782 depends on PCI
783 default y if 40x || 44x
784 default n
785
786config EISA
787 bool
788
789config SBUS
790 bool
791
792config FSL_SOC
793 bool
794
795config FSL_PCI
796 bool
797 select PPC_INDIRECT_PCI
798 select PCI_QUIRKS
799
800config FSL_PMC
801 bool
802 default y
803 depends on SUSPEND && (PPC_85xx || PPC_86xx)
804 help
805 Freescale MPC85xx/MPC86xx power management controller support
806 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
807
808config PPC4xx_CPM
809 bool
810 default y
811 depends on SUSPEND && (44x || 40x)
812 help
813 PPC4xx Clock Power Management (CPM) support (suspend/resume).
814 It also enables support for two different idle states (idle-wait
815 and idle-doze).
816
817config 4xx_SOC
818 bool
819
820config FSL_LBC
821 bool "Freescale Local Bus support"
822 help
823 Enables reporting of errors from the Freescale local bus
824 controller. Also contains some common code used by
825 drivers for specific local bus peripherals.
826
827config FSL_GTM
828 bool
829 depends on PPC_83xx || QUICC_ENGINE || CPM2
830 help
831 Freescale General-purpose Timers support
832
833
834config MCA
835 bool
836
837
838
839
840config PPC_PCI_CHOICE
841 bool
842
843config PCI
844 bool "PCI support" if PPC_PCI_CHOICE
845 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
846 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
847 default PCI_QSPAN if !4xx && !CPM2 && 8xx
848 select GENERIC_PCI_IOMAP
849 help
850 Find out whether your system includes a PCI bus. PCI is the name of
851 a bus system, i.e. the way the CPU talks to the other stuff inside
852 your box. If you say Y here, the kernel will include drivers and
853 infrastructure code to support PCI bus devices.
854
855config PCI_DOMAINS
856 def_bool PCI
857
858config PCI_SYSCALL
859 def_bool PCI
860
861config PCI_QSPAN
862 bool "QSpan PCI"
863 depends on !4xx && !CPM2 && 8xx
864 select PPC_I8259
865 help
866 Say Y here if you have a system based on a Motorola 8xx-series
867 embedded processor with a QSPAN PCI interface, otherwise say N.
868
869config PCI_8260
870 bool
871 depends on PCI && 8260
872 select PPC_INDIRECT_PCI
873 default y
874
875source "drivers/pci/Kconfig"
876
877source "drivers/pcmcia/Kconfig"
878
879config HAS_RAPIDIO
880 bool
881 default n
882
883config RAPIDIO
884 tristate "RapidIO support"
885 depends on HAS_RAPIDIO || PCI
886 help
887 If you say Y here, the kernel will include drivers and
888 infrastructure code to support RapidIO interconnect devices.
889
890config FSL_RIO
891 bool "Freescale Embedded SRIO Controller support"
892 depends on RAPIDIO = y && HAS_RAPIDIO
893 default "n"
894 ---help---
895 Include support for RapidIO controller on Freescale embedded
896 processors (MPC8548, MPC8641, etc).
897
898source "drivers/rapidio/Kconfig"
899
900endmenu
901
902config NONSTATIC_KERNEL
903 bool
904 default n
905
906menu "Advanced setup"
907 depends on PPC32
908
909config ADVANCED_OPTIONS
910 bool "Prompt for advanced kernel configuration options"
911 help
912 This option will enable prompting for a variety of advanced kernel
913 configuration options. These options can cause the kernel to not
914 work if they are set incorrectly, but can be used to optimize certain
915 aspects of kernel memory management.
916
917 Unless you know what you are doing, say N here.
918
919comment "Default settings for advanced configuration options are used"
920 depends on !ADVANCED_OPTIONS
921
922config LOWMEM_SIZE_BOOL
923 bool "Set maximum low memory"
924 depends on ADVANCED_OPTIONS
925 help
926 This option allows you to set the maximum amount of memory which
927 will be used as "low memory", that is, memory which the kernel can
928 access directly, without having to set up a kernel virtual mapping.
929 This can be useful in optimizing the layout of kernel virtual
930 memory.
931
932 Say N here unless you know what you are doing.
933
934config LOWMEM_SIZE
935 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
936 default "0x30000000"
937
938config LOWMEM_CAM_NUM_BOOL
939 bool "Set number of CAMs to use to map low memory"
940 depends on ADVANCED_OPTIONS && FSL_BOOKE
941 help
942 This option allows you to set the maximum number of CAM slots that
943 will be used to map low memory. There are a limited number of slots
944 available and even more limited number that will fit in the L1 MMU.
945 However, using more entries will allow mapping more low memory. This
946 can be useful in optimizing the layout of kernel virtual memory.
947
948 Say N here unless you know what you are doing.
949
950config LOWMEM_CAM_NUM
951 depends on FSL_BOOKE
952 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
953 default 3
954
955config DYNAMIC_MEMSTART
956 bool "Enable page aligned dynamic load address for kernel"
957 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
958 select NONSTATIC_KERNEL
959 help
960 This option enables the kernel to be loaded at any page aligned
961 physical address. The kernel creates a mapping from KERNELBASE to
962 the address where the kernel is loaded. The page size here implies
963 the TLB page size of the mapping for kernel on the particular platform.
964 Please refer to the init code for finding the TLB page size.
965
966 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
967 kernel image, where the only restriction is the page aligned kernel
968 load address. When this option is enabled, the compile time physical
969 address CONFIG_PHYSICAL_START is ignored.
970
971 This option is overridden by CONFIG_RELOCATABLE
972
973config PAGE_OFFSET_BOOL
974 bool "Set custom page offset address"
975 depends on ADVANCED_OPTIONS
976 help
977 This option allows you to set the kernel virtual address at which
978 the kernel will map low memory. This can be useful in optimizing
979 the virtual memory layout of the system.
980
981 Say N here unless you know what you are doing.
982
983config PAGE_OFFSET
984 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
985 default "0xc0000000"
986
987config KERNEL_START_BOOL
988 bool "Set custom kernel base address"
989 depends on ADVANCED_OPTIONS
990 help
991 This option allows you to set the kernel virtual address at which
992 the kernel will be loaded. Normally this should match PAGE_OFFSET
993 however there are times (like kdump) that one might not want them
994 to be the same.
995
996 Say N here unless you know what you are doing.
997
998config KERNEL_START
999 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1000 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1001 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1002 default "0xc0000000"
1003
1004config PHYSICAL_START_BOOL
1005 bool "Set physical address where the kernel is loaded"
1006 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1007 help
1008 This gives the physical address where the kernel is loaded.
1009
1010 Say N here unless you know what you are doing.
1011
1012config PHYSICAL_START
1013 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1014 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1015 default "0x00000000"
1016
1017config PHYSICAL_ALIGN
1018 hex
1019 default "0x04000000" if FSL_BOOKE
1020 help
1021 This value puts the alignment restrictions on physical address
1022 where kernel is loaded and run from. Kernel is compiled for an
1023 address which meets above alignment restriction.
1024
1025config TASK_SIZE_BOOL
1026 bool "Set custom user task size"
1027 depends on ADVANCED_OPTIONS
1028 help
1029 This option allows you to set the amount of virtual address space
1030 allocated to user tasks. This can be useful in optimizing the
1031 virtual memory layout of the system.
1032
1033 Say N here unless you know what you are doing.
1034
1035config TASK_SIZE
1036 hex "Size of user task space" if TASK_SIZE_BOOL
1037 default "0x80000000" if PPC_8xx
1038 default "0xc0000000"
1039
1040config CONSISTENT_SIZE_BOOL
1041 bool "Set custom consistent memory pool size"
1042 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1043 help
1044 This option allows you to set the size of the
1045 consistent memory pool. This pool of virtual memory
1046 is used to make consistent memory allocations.
1047
1048config CONSISTENT_SIZE
1049 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1050 default "0x00200000" if NOT_COHERENT_CACHE
1051
1052config PIN_TLB
1053 bool "Pinned Kernel TLBs (860 ONLY)"
1054 depends on ADVANCED_OPTIONS && 8xx
1055
1056config PIN_TLB_IMMR
1057 bool "Pinned TLB for IMMR"
1058 depends on PIN_TLB
1059 default y
1060endmenu
1061
1062if PPC64
1063
1064config PAGE_OFFSET
1065 hex
1066 default "0xc000000000000000"
1067config KERNEL_START
1068 hex
1069 default "0xc000000000000000"
1070config PHYSICAL_START
1071 hex
1072 default "0x00000000"
1073endif
1074
1075config ARCH_RANDOM
1076 def_bool n
1077
1078source "net/Kconfig"
1079
1080source "drivers/Kconfig"
1081
1082source "fs/Kconfig"
1083
1084source "lib/Kconfig"
1085
1086source "arch/powerpc/Kconfig.debug"
1087
1088source "security/Kconfig"
1089
1090config KEYS_COMPAT
1091 bool
1092 depends on COMPAT && KEYS
1093 default y
1094
1095source "crypto/Kconfig"
1096
1097config PPC_LIB_RHEAP
1098 bool
1099
1100source "arch/powerpc/kvm/Kconfig"
1101
1102source "kernel/livepatch/Kconfig"
1103
