1 # SPDX-License-Identifier: GPL-2.0
2 source "arch/powerpc/platforms/Kconfig.cputype
3
4 config CC_HAS_ELFV2
5 def_bool PPC64 && $(cc-option, -mabi=e
6
7 config CC_HAS_PREFIXED
8 def_bool PPC64 && $(cc-option, -mcpu=p
9
10 config CC_HAS_PCREL
11 # Clang has a bug (https://github.com/
12 # where pcrel code is not generated if
13 # -mno-vsx options are also given. Wit
14 # instructions are generated from regu
15 # do pcrel yet.
16 def_bool PPC64 && CC_IS_GCC && $(cc-op
17
18 config 32BIT
19 bool
20 default y if PPC32
21
22 config 64BIT
23 bool
24 default y if PPC64
25
26 config LIVEPATCH_64
27 def_bool PPC64
28 depends on LIVEPATCH
29
30 config MMU
31 bool
32 default y
33
34 config ARCH_MMAP_RND_BITS_MAX
35 # On Book3S 64, the default virtual ad
36 # is 2^47 (128TB). As a maximum, allow
37 # 32T of address space (2^45), which s
38 # between bottom-up and top-down alloc
39 # consume "normal" amounts of address
40 # and 4K page sizes.
41 default 29 if PPC_BOOK3S_64 && PPC_64K
42 default 33 if PPC_BOOK3S_64
43 #
44 # On all other 64-bit platforms (curre
45 # address space is 2^46 (64TB). Allow
46 # of address space (2^44). Only 4K pag
47 default 32 if 64BIT # 32 = 44 (16T
48 #
49 # For 32-bit, use the compat values, a
50 default ARCH_MMAP_RND_COMPAT_BITS_MAX
51
52 config ARCH_MMAP_RND_BITS_MIN
53 # Allow randomisation to consume up to
54 default 14 if 64BIT && PPC_64K_PAGES
55 default 18 if 64BIT
56 #
57 # For 32-bit, use the compat values, a
58 default ARCH_MMAP_RND_COMPAT_BITS_MIN
59
60 config ARCH_MMAP_RND_COMPAT_BITS_MAX
61 # Total virtual address space for 32-b
62 # Allow randomisation to consume up to
63 default 11 if PPC_256K_PAGES # 11 =
64 default 13 if PPC_64K_PAGES # 13 =
65 default 15 if PPC_16K_PAGES # 15 =
66 default 17 # 17 =
67
68 config ARCH_MMAP_RND_COMPAT_BITS_MIN
69 # Total virtual address space for 32-b
70 # Allow randomisation to consume up to
71 default 5 if PPC_256K_PAGES # 5 =
72 default 7 if PPC_64K_PAGES # 7 =
73 default 9 if PPC_16K_PAGES # 9 =
74 default 11 # 11 =
75
76 config NR_IRQS
77 int "Number of virtual interrupt numbe
78 range 32 1048576
79 default "512"
80 help
81 This defines the number of virtual i
82 can manage. Virtual interrupt number
83 /proc/interrupts. If you configure y
84 drivers will fail to load or worse -
85
86 config NMI_IPI
87 bool
88 depends on SMP && (DEBUGGER || KEXEC_C
89 default y
90
91 config PPC_WATCHDOG
92 bool
93 depends on HARDLOCKUP_DETECTOR_ARCH
94 default y
95 help
96 This is a placeholder when the power
97 watchdog is selected (arch/powerpc/k
98 selected via the generic lockup dete
99 have no standalone config option for
100
101 config STACKTRACE_SUPPORT
102 bool
103 default y
104
105 config LOCKDEP_SUPPORT
106 bool
107 default y
108
109 config GENERIC_LOCKBREAK
110 bool
111 default y
112 depends on SMP && PREEMPTION && !PPC_Q
113
114 config GENERIC_HWEIGHT
115 bool
116 default y
117
118 config PPC
119 bool
120 default y
121 #
122 # Please keep this list sorted alphabe
123 #
124 select ARCH_32BIT_OFF_T if PPC32
125 select ARCH_DISABLE_KASAN_INLINE
126 select ARCH_DMA_DEFAULT_COHERENT
127 select ARCH_ENABLE_MEMORY_HOTPLUG
128 select ARCH_ENABLE_MEMORY_HOTREMOVE
129 select ARCH_HAS_COPY_MC
130 select ARCH_HAS_CURRENT_STACK_POINTER
131 select ARCH_HAS_DEBUG_VIRTUAL
132 select ARCH_HAS_DEBUG_VM_PGTABLE
133 select ARCH_HAS_DEBUG_WX
134 select ARCH_HAS_DEVMEM_IS_ALLOWED
135 select ARCH_HAS_DMA_MAP_DIRECT
136 select ARCH_HAS_DMA_OPS
137 select ARCH_HAS_FORTIFY_SOURCE
138 select ARCH_HAS_GCOV_PROFILE_ALL
139 select ARCH_HAS_KCOV
140 select ARCH_HAS_KERNEL_FPU_SUPPORT
141 select ARCH_HAS_MEMBARRIER_CALLBACKS
142 select ARCH_HAS_MEMBARRIER_SYNC_CORE
143 select ARCH_HAS_MEMREMAP_COMPAT_ALIGN
144 select ARCH_HAS_MMIOWB
145 select ARCH_HAS_NON_OVERLAPPING_ADDRES
146 select ARCH_HAS_PHYS_TO_DMA
147 select ARCH_HAS_PMEM_API
148 select ARCH_HAS_PTE_DEVMAP
149 select ARCH_HAS_PTE_SPECIAL
150 select ARCH_HAS_SCALED_CPUTIME
151 select ARCH_HAS_SET_MEMORY
152 select ARCH_HAS_STRICT_KERNEL_RWX
153 select ARCH_HAS_STRICT_KERNEL_RWX
154 select ARCH_HAS_STRICT_MODULE_RWX
155 select ARCH_HAS_SYSCALL_WRAPPER
156 select ARCH_HAS_TICK_BROADCAST
157 select ARCH_HAS_UACCESS_FLUSHCACHE
158 select ARCH_HAS_UBSAN
159 select ARCH_HAVE_NMI_SAFE_CMPXCHG
160 select ARCH_HAVE_EXTRA_ELF_NOTES
161 select ARCH_KEEP_MEMBLOCK
162 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABL
163 select ARCH_MIGHT_HAVE_PC_PARPORT
164 select ARCH_MIGHT_HAVE_PC_SERIO
165 select ARCH_OPTIONAL_KERNEL_RWX
166 select ARCH_OPTIONAL_KERNEL_RWX_DEFAUL
167 select ARCH_SPLIT_ARG64
168 select ARCH_STACKWALK
169 select ARCH_SUPPORTS_ATOMIC_RMW
170 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
171 select ARCH_USE_BUILTIN_BSWAP
172 select ARCH_USE_CMPXCHG_LOCKREF
173 select ARCH_USE_MEMTEST
174 select ARCH_USE_QUEUED_RWLOCKS
175 select ARCH_WANT_DEFAULT_BPF_JIT
176 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_
177 select ARCH_WANT_IPC_PARSE_VERSION
178 select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
179 select ARCH_WANT_LD_ORPHAN_WARN
180 select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP
181 select ARCH_WANTS_MODULES_DATA_IN_VMAL
182 select ARCH_WEAK_RELEASE_ACQUIRE
183 select BINFMT_ELF
184 select BUILDTIME_TABLE_SORT
185 select CLONE_BACKWARDS
186 select CPUMASK_OFFSTACK
187 select DCACHE_WORD_ACCESS
188 select DMA_OPS_BYPASS
189 select DYNAMIC_FTRACE
190 select EDAC_ATOMIC_SCRUB
191 select EDAC_SUPPORT
192 select FTRACE_MCOUNT_USE_PATCHABLE_FUN
193 select FUNCTION_ALIGNMENT_4B
194 select GENERIC_ATOMIC64
195 select GENERIC_CLOCKEVENTS_BROADCAST
196 select GENERIC_CMOS_UPDATE
197 select GENERIC_CPU_AUTOPROBE
198 select GENERIC_CPU_VULNERABILITIES
199 select GENERIC_EARLY_IOREMAP
200 select GENERIC_GETTIMEOFDAY
201 select GENERIC_IDLE_POLL_SETUP
202 select GENERIC_IOREMAP
203 select GENERIC_IRQ_SHOW
204 select GENERIC_IRQ_SHOW_LEVEL
205 select GENERIC_PCI_IOMAP
206 select GENERIC_PTDUMP
207 select GENERIC_SMP_IDLE_THREAD
208 select GENERIC_TIME_VSYSCALL
209 select GENERIC_VDSO_TIME_NS
210 select HAS_IOPORT
211 select HAVE_ARCH_AUDITSYSCALL
212 select HAVE_ARCH_HUGE_VMALLOC
213 select HAVE_ARCH_HUGE_VMAP
214 select HAVE_ARCH_JUMP_LABEL
215 select HAVE_ARCH_JUMP_LABEL_RELATIVE
216 select HAVE_ARCH_KASAN
217 select HAVE_ARCH_KASAN
218 select HAVE_ARCH_KASAN
219 select HAVE_ARCH_KASAN_VMALLOC
220 select HAVE_ARCH_KCSAN
221 select HAVE_ARCH_KFENCE
222 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS
223 select HAVE_ARCH_WITHIN_STACK_FRAMES
224 select HAVE_ARCH_KGDB
225 select HAVE_ARCH_MMAP_RND_BITS
226 select HAVE_ARCH_MMAP_RND_COMPAT_BITS
227 select HAVE_ARCH_NVRAM_OPS
228 select HAVE_ARCH_SECCOMP_FILTER
229 select HAVE_ARCH_TRACEHOOK
230 select HAVE_ASM_MODVERSIONS
231 select HAVE_CONTEXT_TRACKING_USER
232 select HAVE_C_RECORDMCOUNT
233 select HAVE_DEBUG_KMEMLEAK
234 select HAVE_DEBUG_STACKOVERFLOW
235 select HAVE_DYNAMIC_FTRACE
236 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
237 select HAVE_DYNAMIC_FTRACE_WITH_REGS
238 select HAVE_EBPF_JIT
239 select HAVE_EFFICIENT_UNALIGNED_ACCESS
240 select HAVE_GUP_FAST
241 select HAVE_FTRACE_MCOUNT_RECORD
242 select HAVE_FUNCTION_ARG_ACCESS_API
243 select HAVE_FUNCTION_DESCRIPTORS
244 select HAVE_FUNCTION_ERROR_INJECTION
245 select HAVE_FUNCTION_GRAPH_TRACER
246 select HAVE_FUNCTION_TRACER
247 select HAVE_GCC_PLUGINS
248 select HAVE_GENERIC_VDSO
249 select HAVE_HARDLOCKUP_DETECTOR_ARCH
250 select HAVE_HARDLOCKUP_DETECTOR_PERF
251 select HAVE_HW_BREAKPOINT
252 select HAVE_IOREMAP_PROT
253 select HAVE_IRQ_TIME_ACCOUNTING
254 select HAVE_KERNEL_GZIP
255 select HAVE_KERNEL_LZMA
256 select HAVE_KERNEL_LZO
257 select HAVE_KERNEL_XZ
258 select HAVE_KPROBES
259 select HAVE_KPROBES_ON_FTRACE
260 select HAVE_KRETPROBES
261 select HAVE_LD_DEAD_CODE_DATA_ELIMINAT
262 select HAVE_LIVEPATCH
263 select HAVE_MOD_ARCH_SPECIFIC
264 select HAVE_NMI
265 select HAVE_OPTPROBES
266 select HAVE_OBJTOOL
267 select HAVE_OBJTOOL_MCOUNT
268 select HAVE_PERF_EVENTS
269 select HAVE_PERF_EVENTS_NMI
270 select HAVE_PERF_REGS
271 select HAVE_PERF_USER_STACK_DUMP
272 select HAVE_RETHOOK
273 select HAVE_REGS_AND_STACK_ACCESS_API
274 select HAVE_RELIABLE_STACKTRACE
275 select HAVE_RSEQ
276 select HAVE_SETUP_PER_CPU_AREA
277 select HAVE_SOFTIRQ_ON_OWN_STACK
278 select HAVE_STACKPROTECTOR
279 select HAVE_STACKPROTECTOR
280 select HAVE_STATIC_CALL
281 select HAVE_SYSCALL_TRACEPOINTS
282 select HAVE_VIRT_CPU_ACCOUNTING
283 select HAVE_VIRT_CPU_ACCOUNTING_GEN
284 select HOTPLUG_SMT
285 select SMT_NUM_THREADS_DYNAMIC
286 select HUGETLB_PAGE_SIZE_VARIABLE
287 select IOMMU_HELPER
288 select IRQ_DOMAIN
289 select IRQ_FORCED_THREADING
290 select KASAN_VMALLOC
291 select LOCK_MM_AND_FIND_VMA
292 select MMU_GATHER_PAGE_SIZE
293 select MMU_GATHER_RCU_TABLE_FREE
294 select MMU_GATHER_MERGE_VMAS
295 select MMU_LAZY_TLB_SHOOTDOWN
296 select MODULES_USE_ELF_RELA
297 select NEED_DMA_MAP_STATE
298 select NEED_PER_CPU_EMBED_FIRST_CHUNK
299 select NEED_PER_CPU_PAGE_FIRST_CHUNK
300 select NEED_SG_DMA_LENGTH
301 select OF
302 select OF_EARLY_FLATTREE
303 select OLD_SIGACTION
304 select OLD_SIGSUSPEND
305 select PCI_DOMAINS
306 select PCI_MSI_ARCH_FALLBACKS
307 select PCI_SYSCALL
308 select PPC_DAWR
309 select RTC_LIB
310 select SPARSE_IRQ
311 select STRICT_KERNEL_RWX if STRICT_MOD
312 select SYSCTL_EXCEPTION_TRACE
313 select THREAD_INFO_IN_TASK
314 select TRACE_IRQFLAGS_SUPPORT
315 select VDSO_GETRANDOM
316 #
317 # Please keep this list sorted alphabe
318 #
319
320 config PPC_BARRIER_NOSPEC
321 bool
322 default y
323 depends on PPC_BOOK3S_64 || PPC_E500
324
325 config PPC_HAS_LBARX_LHARX
326 bool
327
328 config EARLY_PRINTK
329 bool
330 default y
331
332 config PANIC_TIMEOUT
333 int
334 default 180
335
336 config COMPAT
337 bool "Enable support for 32bit binarie
338 depends on PPC64
339 default y if !CPU_LITTLE_ENDIAN
340 select ARCH_WANT_OLD_COMPAT_IPC
341 select COMPAT_OLD_SIGACTION
342
343 config SCHED_OMIT_FRAME_POINTER
344 bool
345 default y
346
347 config ARCH_MAY_HAVE_PC_FDC
348 bool
349 default PCI
350
351 config PPC_UDBG_16550
352 bool
353
354 config GENERIC_TBSYNC
355 bool
356 default y if PPC32 && SMP
357
358 config AUDIT_ARCH
359 bool
360 default y
361
362 config GENERIC_BUG
363 bool
364 default y
365 depends on BUG
366
367 config GENERIC_BUG_RELATIVE_POINTERS
368 def_bool y
369 depends on GENERIC_BUG
370
371 config SYS_SUPPORTS_APM_EMULATION
372 default y if PMAC_APM_EMU
373 bool
374
375 config EPAPR_BOOT
376 bool
377 help
378 Used to allow a board to specify it
379
380 config DEFAULT_UIMAGE
381 bool
382 help
383 Used to allow a board to specify it
384
385 config ARCH_HIBERNATION_POSSIBLE
386 bool
387 default y
388
389 config ARCH_SUSPEND_POSSIBLE
390 def_bool y
391 depends on ADB_PMU || PPC_EFIKA || PPC
392 (PPC_85xx && !PPC_E500MC) |
393 || 44x
394
395 config ARCH_SUSPEND_NONZERO_CPU
396 def_bool y
397 depends on PPC_POWERNV || PPC_PSERIES
398
399 config ARCH_HAS_ADD_PAGES
400 def_bool y
401 depends on ARCH_ENABLE_MEMORY_HOTPLUG
402
403 config PPC_DCR_NATIVE
404 bool
405
406 config PPC_DCR_MMIO
407 bool
408
409 config PPC_DCR
410 bool
411 depends on PPC_DCR_NATIVE || PPC_DCR_M
412 default y
413
414 config PPC_PCI_OF_BUS_MAP
415 bool "Use pci_to_OF_bus_map (deprecate
416 depends on PPC32
417 depends on PPC_PMAC || PPC_CHRP
418 help
419 This option uses pci_to_OF_bus_map t
420 restricts the system to only having
421 the "pci-OF-bus-map" property to be
422
423 If unsure, say "N".
424
425 config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
426 depends on PPC32
427 depends on !PPC_PCI_OF_BUS_MAP
428 bool "Assign PCI bus numbers from zero
429 default y
430 help
431 By default on PPC32 were PCI bus num
432 So system could have only 256 PCI bu
433 PCI domains. When this option is ena
434 PCI domain dependent and each PCI co
435 256 PCI buses, like it is on other L
436
437 config PPC_OF_PLATFORM_PCI
438 bool
439 depends on PCI
440 depends on PPC64 # not supported on 32
441
442 config ARCH_SUPPORTS_UPROBES
443 def_bool y
444
445 config PPC_ADV_DEBUG_REGS
446 bool
447 depends on BOOKE
448 default y
449
450 config PPC_ADV_DEBUG_IACS
451 int
452 depends on PPC_ADV_DEBUG_REGS
453 default 4 if 44x
454 default 2
455
456 config PPC_ADV_DEBUG_DACS
457 int
458 depends on PPC_ADV_DEBUG_REGS
459 default 2
460
461 config PPC_ADV_DEBUG_DVCS
462 int
463 depends on PPC_ADV_DEBUG_REGS
464 default 2 if 44x
465 default 0
466
467 config PPC_ADV_DEBUG_DAC_RANGE
468 bool
469 depends on PPC_ADV_DEBUG_REGS && 44x
470 default y
471
472 config PPC_DAWR
473 bool
474
475 config PGTABLE_LEVELS
476 int
477 default 2 if !PPC64
478 default 4
479
480 source "arch/powerpc/sysdev/Kconfig"
481 source "arch/powerpc/platforms/Kconfig"
482
483 menu "Kernel options"
484
485 config HIGHMEM
486 bool "High memory support"
487 depends on PPC32
488 select KMAP_LOCAL
489
490 source "kernel/Kconfig.hz"
491
492 config MATH_EMULATION
493 bool "Math emulation"
494 depends on 44x || PPC_8xx || PPC_MPC83
495 select PPC_FPU_REGS
496 help
497 Some PowerPC chips designed for embe
498 a floating-point unit and therefore
499 floating-point instructions in the P
500 say Y here, the kernel will include
501 unit, which will allow programs that
502 instructions to run.
503
504 This is also useful to emulate missi
505 such as fsqrt on cores that do have
506 them (such as Freescale BookE).
507
508 choice
509 prompt "Math emulation options"
510 default MATH_EMULATION_FULL
511 depends on MATH_EMULATION
512
513 config MATH_EMULATION_FULL
514 bool "Emulate all the floating point i
515 help
516 Select this option will enable the k
517 all the floating point instructions.
518 a FPU, you should select this.
519
520 config MATH_EMULATION_HW_UNIMPLEMENTED
521 bool "Just emulate the FPU unimplement
522 help
523 Select this if you know there does h
524 SoC, but some floating point instruc
525
526 endchoice
527
528 config PPC_TRANSACTIONAL_MEM
529 bool "Transactional Memory support for
530 depends on PPC_BOOK3S_64
531 depends on SMP
532 select ALTIVEC
533 select VSX
534 help
535 Support user-mode Transactional Memo
536
537 config PPC_UV
538 bool "Ultravisor support"
539 depends on KVM_BOOK3S_HV_POSSIBLE
540 depends on DEVICE_PRIVATE
541 default n
542 help
543 This option paravirtualizes the kern
544 supports the Protected Execution Fac
545 the ultravisor firmware runs at a pr
546 hypervisor.
547
548 If unsure, say "N".
549
550 config LD_HEAD_STUB_CATCH
551 bool "Reserve 256 bytes to cope with l
552 depends on PPC64
553 help
554 Very large kernels can cause linker
555 code in head_64.S, which moves the h
556 specified location. This option can
557
558 If unsure, say "N".
559
560 config MPROFILE_KERNEL
561 depends on PPC64_ELF_ABI_V2 && FUNCTIO
562 def_bool $(success,$(srctree)/arch/pow
563 def_bool $(success,$(srctree)/arch/pow
564
565 config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
566 depends on FUNCTION_TRACER && (PPC32 |
567 depends on $(cc-option,-fpatchable-fun
568 def_bool y if PPC32
569 def_bool $(success,$(srctree)/arch/pow
570 def_bool $(success,$(srctree)/arch/pow
571
572 config HOTPLUG_CPU
573 bool "Support for enabling/disabling C
574 depends on SMP && (PPC_PSERIES || \
575 PPC_PMAC || PPC_POWERNV || FSL
576 help
577 Say Y here to be able to disable and
578 CPUs at runtime on SMP machines.
579
580 Say N if you are unsure.
581
582 config INTERRUPT_SANITIZE_REGISTERS
583 bool "Clear gprs on interrupt arrival"
584 depends on PPC64 && ARCH_HAS_SYSCALL_W
585 default PPC_BOOK3E_64 || PPC_PSERIES |
586 help
587 Reduce the influence of user registe
588 syscalls through clearing user state
589 the exception.
590
591 config PPC_QUEUED_SPINLOCKS
592 bool "Queued spinlocks" if EXPERT
593 depends on SMP
594 default PPC_BOOK3S_64
595 help
596 Say Y here to use queued spinlocks w
597 fairness on large SMP and NUMA syste
598 performance.
599
600 config ARCH_CPU_PROBE_RELEASE
601 def_bool y
602 depends on HOTPLUG_CPU
603
604 config PPC64_SUPPORTS_MEMORY_FAILURE
605 bool "Add support for memory hwpoison"
606 depends on PPC_BOOK3S_64
607 default "y" if PPC_POWERNV
608 select ARCH_SUPPORTS_MEMORY_FAILURE
609
610 config ARCH_SUPPORTS_KEXEC
611 def_bool PPC_BOOK3S || PPC_E500 || (44
612
613 config ARCH_SUPPORTS_KEXEC_FILE
614 def_bool PPC64
615
616 config ARCH_SUPPORTS_KEXEC_PURGATORY
617 def_bool y
618
619 config ARCH_SELECTS_KEXEC_FILE
620 def_bool y
621 depends on KEXEC_FILE
622 select KEXEC_ELF
623 select HAVE_IMA_KEXEC if IMA
624
625 config PPC64_BIG_ENDIAN_ELF_ABI_V2
626 # Option is available to BFD, but LLD
627 # always true there.
628 prompt "Build big-endian kernel using
629 def_bool y
630 depends on PPC64 && CPU_BIG_ENDIAN
631 depends on CC_HAS_ELFV2
632 help
633 This builds the kernel image using t
634 V2 ABI Specification", which has a r
635 function calls. This internal kernel
636 userspace compatibility.
637
638 The V2 ABI is standard for 64-bit li
639 it is less well tested by kernel and
640 build userspace this way, and it can
641
642 config RELOCATABLE
643 bool "Build a relocatable kernel"
644 depends on PPC64 || (FLATMEM && (44x |
645 select NONSTATIC_KERNEL
646 help
647 This builds a kernel image that is c
648 location the kernel is loaded at. Fo
649 alignment restrictions, and this fea
650 DYNAMIC_MEMSTART and hence overrides
651 16k-aligned base address. The kernel
652 position-independent executable (PIE
653 which are processed early in the boo
654
655 One use is for the kexec on panic ca
656 must live at a different physical ad
657 kernel.
658
659 Note: If CONFIG_RELOCATABLE=y, then
660 it has been loaded at and the compil
661 CONFIG_PHYSICAL_START is ignored. H
662 setting can still be useful to bootw
663 load address of the kernel (eg. u-bo
664
665 config RANDOMIZE_BASE
666 bool "Randomize the address of the ker
667 depends on PPC_85xx && FLATMEM
668 depends on RELOCATABLE
669 help
670 Randomizes the virtual address at wh
671 loaded, as a security feature that d
672 relying on knowledge of the location
673
674 If unsure, say Y.
675
676 config RELOCATABLE_TEST
677 bool "Test relocatable kernel"
678 depends on (PPC64 && RELOCATABLE)
679 help
680 This runs the relocatable kernel at
681 loaded at, which tends to be non-zer
682 relocation code.
683
684 config ARCH_SUPPORTS_CRASH_DUMP
685 def_bool PPC64 || PPC_BOOK3S_32 || PPC
686
687 config ARCH_SELECTS_CRASH_DUMP
688 def_bool y
689 depends on CRASH_DUMP
690 select RELOCATABLE if PPC64 || 44x ||
691
692 config ARCH_SUPPORTS_CRASH_HOTPLUG
693 def_bool y
694 depends on PPC64
695
696 config FA_DUMP
697 bool "Firmware-assisted dump"
698 depends on CRASH_DUMP && PPC64 && (PPC
699 help
700 A robust mechanism to get reliable k
701 assistance from firmware. This appro
702 instead firmware assists in booting
703 while preserving memory contents. Fi
704 is meant to be a kdump replacement o
705 speed not possible without system fi
706
707 If unsure, say "y". Only special ker
708 need to say "N" here.
709
710 config PRESERVE_FA_DUMP
711 bool "Preserve Firmware-assisted dump"
712 depends on PPC64 && PPC_POWERNV && !FA
713 help
714 On a kernel with FA_DUMP disabled, t
715 crash data from a previously crash'e
716 memory preserving kernel boot would
717 Petitboot kernel is the typical usec
718
719 config OPAL_CORE
720 bool "Export OPAL memory as /sys/firmw
721 depends on PPC64 && PPC_POWERNV
722 help
723 This option uses the MPIPL support i
724 ELF core of OPAL memory after a cras
725 as /sys/firmware/opal/core file whic
726 OPAL crashes using GDB.
727
728 config IRQ_ALL_CPUS
729 bool "Distribute interrupts on all CPU
730 depends on SMP
731 help
732 This option gives the kernel permiss
733 multiple CPUs. Saying N here will r
734 CPU. Generally saying Y is safe, al
735 reported with SMP Power Macintoshes
736
737 config NUMA
738 bool "NUMA Memory Allocation and Sched
739 depends on PPC64 && SMP
740 default y if PPC_PSERIES || PPC_POWERN
741 select USE_PERCPU_NUMA_NODE_ID
742 help
743 Enable NUMA (Non-Uniform Memory Acce
744
745 The kernel will try to allocate memo
746 local memory controller of the CPU a
747 NUMA awareness to the kernel.
748
749 config NODES_SHIFT
750 int
751 default "8" if PPC64
752 default "4"
753 depends on NUMA
754
755 config HAVE_MEMORYLESS_NODES
756 def_bool y
757 depends on NUMA
758
759 config ARCH_SELECT_MEMORY_MODEL
760 def_bool y
761 depends on PPC64
762
763 config ARCH_FLATMEM_ENABLE
764 def_bool y
765 depends on (PPC64 && !NUMA) || PPC32
766
767 config ARCH_SPARSEMEM_ENABLE
768 def_bool y
769 depends on PPC64
770 select SPARSEMEM_VMEMMAP_ENABLE
771
772 config ARCH_SPARSEMEM_DEFAULT
773 def_bool y
774 depends on PPC_BOOK3S_64
775
776 config ILLEGAL_POINTER_VALUE
777 hex
778 # This is roughly half way between the
779 # of kernel space, which seems about a
780 default 0x5deadbeef0000000 if PPC64
781 default 0
782
783 config ARCH_MEMORY_PROBE
784 def_bool y
785 depends on MEMORY_HOTPLUG
786
787 choice
788 prompt "Page size"
789 default PPC_64K_PAGES if PPC_BOOK3S_64
790 default PPC_4K_PAGES
791 help
792 Select the kernel logical page size.
793 will reduce software overhead at eac
794 hardware prefetch mechanisms to be m
795 larger dma transfers increasing IO e
796 overhead. However the utilization of
797 For example, each cached file will u
798 page size to hold its contents and t
799 end of file and the end of page is w
800
801 Some dedicated systems, such as soft
802 accelerated calculations, have shown
803
804 If you configure a 64 bit kernel for
805 processor does not support them, the
806 them with 4k pages, loading them on
807 reduced software overhead and larger
808 For the 32 bit kernel, a large page
809 unless it is supported by the config
810
811 If unsure, choose 4K_PAGES.
812
813 config PPC_4K_PAGES
814 bool "4k page size"
815 select HAVE_ARCH_SOFT_DIRTY if PPC_BOO
816 select HAVE_PAGE_SIZE_4KB
817
818 config PPC_16K_PAGES
819 bool "16k page size"
820 depends on 44x || PPC_8xx
821 select HAVE_PAGE_SIZE_16KB
822
823 config PPC_64K_PAGES
824 bool "64k page size"
825 depends on 44x || PPC_BOOK3S_64
826 select HAVE_ARCH_SOFT_DIRTY if PPC_BOO
827 select HAVE_PAGE_SIZE_64KB
828
829 config PPC_256K_PAGES
830 bool "256k page size (Requires non-sta
831 depends on 44x && !PPC_47x
832 select HAVE_PAGE_SIZE_256KB
833 help
834 Make the page size 256k.
835
836 The kernel will only be able to run
837 compiled with '-zmax-page-size' set
838 binutils later than 2.17.50.0.3, or
839 definition from 0x10000 to 0x40000 i
840
841 endchoice
842
843 config THREAD_SHIFT
844 int "Thread shift" if EXPERT
845 range 13 15
846 default "15" if PPC_256K_PAGES
847 default "15" if PPC_PSERIES || PPC_POW
848 default "14" if PPC64
849 default "13"
850 help
851 Used to define the stack size. The d
852 want. Only change this if you know w
853
854 config DATA_SHIFT_BOOL
855 bool "Set custom data alignment"
856 depends on ADVANCED_OPTIONS
857 depends on STRICT_KERNEL_RWX || DEBUG_
858 depends on (PPC_8xx && !PIN_TLB_DATA &
859 PPC_BOOK3S_32 || PPC_85xx
860 help
861 This option allows you to set the ke
862 RAM is mapped by blocks, the alignme
863 number of possible blocks. The defau
864
865 Say N here unless you know what you
866
867 config DATA_SHIFT
868 int "Data shift" if DATA_SHIFT_BOOL
869 default 24 if STRICT_KERNEL_RWX && PPC
870 range 17 28 if (STRICT_KERNEL_RWX || D
871 range 19 23 if (STRICT_KERNEL_RWX || D
872 range 20 24 if (STRICT_KERNEL_RWX || D
873 default 22 if STRICT_KERNEL_RWX && PPC
874 default 18 if (DEBUG_PAGEALLOC || KFEN
875 default 23 if (STRICT_KERNEL_RWX || DE
876 (PIN_TLB_DATA || PIN_TLB
877 default 19 if (STRICT_KERNEL_RWX || DE
878 default 24 if STRICT_KERNEL_RWX && PPC
879 default PAGE_SHIFT
880 help
881 On Book3S 32 (603+), DBATs are used
882 Smaller is the alignment, greater is
883
884 On 8xx, large pages (512kb or 8M) ar
885 memory. Aligning to 8M reduces TLB m
886 in that case. If PIN_TLB is selected
887 8M pages will be pinned.
888
889 config ARCH_FORCE_MAX_ORDER
890 int "Order of maximal physically conti
891 range 7 8 if PPC64 && PPC_64K_PAGES
892 default "8" if PPC64 && PPC_64K_PAGES
893 range 12 12 if PPC64 && !PPC_64K_PAGES
894 default "12" if PPC64 && !PPC_64K_PAGE
895 range 8 10 if PPC32 && PPC_16K_PAGES
896 default "8" if PPC32 && PPC_16K_PAGES
897 range 6 10 if PPC32 && PPC_64K_PAGES
898 default "6" if PPC32 && PPC_64K_PAGES
899 range 4 10 if PPC32 && PPC_256K_PAGES
900 default "4" if PPC32 && PPC_256K_PAGES
901 range 10 12
902 default "10"
903 help
904 The kernel page allocator limits the
905 contiguous allocations. The limit is
906 defines the maximal power of two of
907 allocated as a single contiguous blo
908 overriding the default setting when
909 large blocks of physically contiguou
910
911 The page size is not necessarily 4KB
912 systems, 64KB pages can be enabled v
913 this in mind when choosing a value f
914
915 Don't change if unsure.
916
917 config PPC_SUBPAGE_PROT
918 bool "Support setting protections for
919 default n
920 depends on PPC_64S_HASH_MMU && PPC_64K
921 help
922 This option adds support for system
923 to set access permissions (read/writ
924 on the 4k subpages of each 64k page.
925
926 If unsure, say N here.
927
928 config PPC_PROT_SAO_LPAR
929 bool "Support PROT_SAO mappings in LPA
930 depends on PPC_BOOK3S_64
931 help
932 This option adds support for PROT_SA
933 inside LPARs on supported CPUs.
934
935 This may cause issues when performin
936 a CPU that supports SAO to one that
937
938 If unsure, say N here.
939
940 config PPC_COPRO_BASE
941 bool
942
943 config SCHED_SMT
944 bool "SMT (Hyperthreading) scheduler s
945 depends on PPC64 && SMP
946 help
947 SMT scheduler support improves the C
948 when dealing with POWER5 cpus at a c
949 overhead in some places. If unsure s
950
951 config PPC_DENORMALISATION
952 bool "PowerPC denormalisation exceptio
953 depends on PPC_BOOK3S_64
954 default "y" if PPC_POWERNV
955 help
956 Add support for handling denormalisa
957 values. Useful for bare metal only.
958
959 config CMDLINE
960 string "Initial kernel command string"
961 default ""
962 help
963 On some platforms, there is currentl
964 pass arguments to the kernel. For th
965 some command-line options at build t
966 most cases you will need to specify
967
968 choice
969 prompt "Kernel command line type"
970 depends on CMDLINE != ""
971 default CMDLINE_FROM_BOOTLOADER
972
973 config CMDLINE_FROM_BOOTLOADER
974 bool "Use bootloader kernel arguments
975 help
976 Uses the command-line options passed
977 the boot loader doesn't provide any,
978 string provided in CMDLINE will be u
979
980 config CMDLINE_EXTEND
981 bool "Extend bootloader kernel argumen
982 help
983 The command-line arguments provided
984 appended to the default kernel comma
985
986 config CMDLINE_FORCE
987 bool "Always use the default kernel co
988 help
989 Always use the default kernel comman
990 loader passes other arguments to the
991 This is useful if you cannot or don'
992 command-line options your boot loade
993
994 endchoice
995
996 config EXTRA_TARGETS
997 string "Additional default image types
998 help
999 List additional targets to be built
1000 by spaces). This is useful for tar
1001 files in the .dts directory.
1002
1003 Targets in this list will be build
1004 target, or when the user does a 'ma
1005 'make zImage.initrd'.
1006
1007 If unsure, leave blank
1008
1009 config ARCH_WANTS_FREEZER_CONTROL
1010 def_bool y
1011 depends on ADB_PMU
1012
1013 source "kernel/power/Kconfig"
1014
1015 config PPC_MEM_KEYS
1016 prompt "PowerPC Memory Protection Key
1017 def_bool y
1018 depends on PPC_BOOK3S_64
1019 depends on PPC_64S_HASH_MMU
1020 select ARCH_USES_HIGH_VMA_FLAGS
1021 select ARCH_HAS_PKEYS
1022 help
1023 Memory Protection Keys provides a m
1024 page-based protections, but without
1025 page tables when an application cha
1026
1027 For details, see Documentation/core
1028
1029 If unsure, say y.
1030
1031 config ARCH_PKEY_BITS
1032 int
1033 default 5
1034
1035 config PPC_SECURE_BOOT
1036 prompt "Enable secure boot support"
1037 bool
1038 depends on PPC_POWERNV || PPC_PSERIES
1039 depends on IMA_ARCH_POLICY
1040 imply IMA_SECURE_AND_OR_TRUSTED_BOOT
1041 select PSERIES_PLPKS if PPC_PSERIES
1042 help
1043 Systems with firmware secure boot e
1044 policies to extend secure boot to t
1045 to enable OS secure boot on systems
1046 it. If in doubt say N.
1047
1048 config PPC_SECVAR_SYSFS
1049 bool "Enable sysfs interface for POWE
1050 default y
1051 depends on PPC_SECURE_BOOT
1052 depends on SYSFS
1053 help
1054 POWER secure variables are managed
1055 These variables are exposed to user
1056 read/write operations on these vari
1057 secure boot enabled and want to exp
1058
1059 endmenu
1060
1061 config ISA_DMA_API
1062 bool
1063 default PCI
1064
1065 menu "Bus options"
1066
1067 config ISA
1068 bool "Support for ISA-bus hardware"
1069 depends on PPC_CHRP
1070 select PPC_I8259
1071 help
1072 Find out whether you have ISA slots
1073 name of a bus system, i.e. the way
1074 inside your box. If you have an Ap
1075 have an IBM RS/6000 or pSeries mach
1076 embedded board, consult your board
1077
1078 config GENERIC_ISA_DMA
1079 bool
1080 depends on ISA_DMA_API
1081 default y
1082
1083 config PPC_INDIRECT_PCI
1084 bool
1085 depends on PCI
1086 default y if 44x
1087
1088 config SBUS
1089 bool
1090
1091 config FSL_SOC
1092 bool
1093
1094 config FSL_PCI
1095 bool
1096 select ARCH_HAS_DMA_SET_MASK
1097 select PPC_INDIRECT_PCI
1098 select PCI_QUIRKS
1099
1100 config FSL_PMC
1101 bool
1102 default y
1103 depends on SUSPEND && (PPC_85xx || PP
1104 help
1105 Freescale MPC85xx/MPC86xx power man
1106 (suspend/resume). For MPC83xx see p
1107
1108 config PPC4xx_CPM
1109 bool
1110 default y
1111 depends on SUSPEND && 44x
1112 help
1113 PPC4xx Clock Power Management (CPM)
1114 It also enables support for two dif
1115 and idle-doze).
1116
1117 config FSL_LBC
1118 bool "Freescale Local Bus support"
1119 help
1120 Enables reporting of errors from th
1121 controller. Also contains some com
1122 drivers for specific local bus peri
1123
1124 config FSL_GTM
1125 bool
1126 depends on PPC_83xx || QUICC_ENGINE |
1127 help
1128 Freescale General-purpose Timers su
1129
1130 config FSL_RIO
1131 bool "Freescale Embedded SRIO Control
1132 depends on RAPIDIO = y && HAVE_RAPIDI
1133 default "n"
1134 help
1135 Include support for RapidIO control
1136 processors (MPC8548, MPC8641, etc).
1137
1138 endmenu
1139
1140 config NONSTATIC_KERNEL
1141 bool
1142
1143 menu "Advanced setup"
1144 depends on PPC32
1145
1146 config ADVANCED_OPTIONS
1147 bool "Prompt for advanced kernel conf
1148 help
1149 This option will enable prompting f
1150 configuration options. These optio
1151 work if they are set incorrectly, b
1152 aspects of kernel memory management
1153
1154 Unless you know what you are doing,
1155
1156 comment "Default settings for advanced config
1157 depends on !ADVANCED_OPTIONS
1158
1159 config LOWMEM_SIZE_BOOL
1160 bool "Set maximum low memory"
1161 depends on ADVANCED_OPTIONS
1162 help
1163 This option allows you to set the m
1164 will be used as "low memory", that
1165 access directly, without having to
1166 This can be useful in optimizing th
1167 memory.
1168
1169 Say N here unless you know what you
1170
1171 config LOWMEM_SIZE
1172 hex "Maximum low memory size (in byte
1173 default "0x30000000"
1174
1175 config LOWMEM_CAM_NUM_BOOL
1176 bool "Set number of CAMs to use to ma
1177 depends on ADVANCED_OPTIONS && PPC_85
1178 help
1179 This option allows you to set the m
1180 will be used to map low memory. Th
1181 available and even more limited num
1182 However, using more entries will al
1183 can be useful in optimizing the lay
1184
1185 Say N here unless you know what you
1186
1187 config LOWMEM_CAM_NUM
1188 depends on PPC_85xx
1189 int "Number of CAMs to use to map low
1190 default 3 if !STRICT_KERNEL_RWX
1191 default 9 if DATA_SHIFT >= 24
1192 default 12 if DATA_SHIFT >= 22
1193 default 15
1194
1195 config DYNAMIC_MEMSTART
1196 bool "Enable page aligned dynamic loa
1197 depends on ADVANCED_OPTIONS && FLATME
1198 select NONSTATIC_KERNEL
1199 help
1200 This option enables the kernel to b
1201 physical address. The kernel create
1202 the address where the kernel is loa
1203 the TLB page size of the mapping fo
1204 Please refer to the init code for f
1205
1206 DYNAMIC_MEMSTART is an easy way of
1207 kernel image, where the only restri
1208 load address. When this option is e
1209 address CONFIG_PHYSICAL_START is ig
1210
1211 This option is overridden by CONFIG
1212
1213 config PAGE_OFFSET_BOOL
1214 bool "Set custom page offset address"
1215 depends on ADVANCED_OPTIONS
1216 help
1217 This option allows you to set the k
1218 the kernel will map low memory. Th
1219 the virtual memory layout of the sy
1220
1221 Say N here unless you know what you
1222
1223 config PAGE_OFFSET
1224 hex "Virtual address of memory base"
1225 default "0xc0000000"
1226
1227 config KERNEL_START_BOOL
1228 bool "Set custom kernel base address"
1229 depends on ADVANCED_OPTIONS
1230 help
1231 This option allows you to set the k
1232 the kernel will be loaded. Normall
1233 however there are times (like kdump
1234 to be the same.
1235
1236 Say N here unless you know what you
1237
1238 config KERNEL_START
1239 hex "Virtual address of kernel base"
1240 default PAGE_OFFSET if PAGE_OFFSET_BO
1241 default "0xc2000000" if CRASH_DUMP &&
1242 default "0xc0000000"
1243
1244 config PHYSICAL_START_BOOL
1245 bool "Set physical address where the
1246 depends on ADVANCED_OPTIONS && FLATME
1247 help
1248 This gives the physical address whe
1249
1250 Say N here unless you know what you
1251
1252 config PHYSICAL_START
1253 hex "Physical address where the kerne
1254 default "0x02000000" if PPC_BOOK3S &&
1255 default "0x00000000"
1256
1257 config PHYSICAL_ALIGN
1258 hex
1259 default "0x04000000" if PPC_85xx
1260 help
1261 This value puts the alignment restr
1262 where kernel is loaded and run from
1263 address which meets above alignment
1264
1265 config TASK_SIZE_BOOL
1266 bool "Set custom user task size"
1267 depends on ADVANCED_OPTIONS
1268 help
1269 This option allows you to set the a
1270 allocated to user tasks. This can
1271 virtual memory layout of the system
1272
1273 Say N here unless you know what you
1274
1275 config TASK_SIZE
1276 hex "Size of user task space" if TASK
1277 default "0x80000000" if PPC_8xx
1278 default "0xb0000000" if PPC_BOOK3S_32
1279 default "0xc0000000"
1280
1281 config MODULES_SIZE_BOOL
1282 bool "Set custom size for modules/exe
1283 depends on EXECMEM && ADVANCED_OPTION
1284 help
1285 This option allows you to set the s
1286 space dedicated for modules/execmem
1287 For the time being it is only for 8
1288 platform share it with vmalloc spac
1289
1290 Say N here unless you know what you
1291
1292 config MODULES_SIZE
1293 int "Size of modules/execmem area (In
1294 range 1 256 if EXECMEM
1295 default 64 if EXECMEM && PPC_BOOK3S_3
1296 default 32 if EXECMEM && PPC_8xx
1297 default 0
1298
1299 endmenu
1300
1301 if PPC64
1302 # This value must have zeroes in the bottom 6
1303 config PAGE_OFFSET
1304 hex
1305 default "0xc000000000000000"
1306 config KERNEL_START
1307 hex
1308 default "0xc000000000000000"
1309 config PHYSICAL_START
1310 hex
1311 default "0x00000000"
1312 endif
1313
1314 config PPC_LIB_RHEAP
1315 bool
1316
1317 source "arch/powerpc/kvm/Kconfig"
1318
1319 source "kernel/livepatch/Kconfig"
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