| blob | de3b07c7be30b0970e2d0217d2538da2740b3255 |
1 # SPDX-License-Identifier: GPL-2.0
2 source "arch/powerpc/platforms/Kconfig.cputype"
4 config PPC32
5 bool
6 default y if !PPC64
8 config 32BIT
9 bool
10 default y if PPC32
12 config 64BIT
13 bool
14 default y if PPC64
16 config ARCH_PHYS_ADDR_T_64BIT
17 def_bool PPC64 || PHYS_64BIT
19 config ARCH_DMA_ADDR_T_64BIT
20 def_bool ARCH_PHYS_ADDR_T_64BIT
22 config MMU
23 bool
24 default y
26 config ARCH_MMAP_RND_BITS_MAX
27 # On Book3S 64, the default virtual address space for 64-bit processes
28 # is 2^47 (128TB). As a maximum, allow randomisation to consume up to
29 # 32T of address space (2^45), which should ensure a reasonable gap
30 # between bottom-up and top-down allocations for applications that
31 # consume "normal" amounts of address space. Book3S 64 only supports 64K
32 # and 4K page sizes.
33 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
34 default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K)
35 #
36 # On all other 64-bit platforms (currently only Book3E), the virtual
37 # address space is 2^46 (64TB). Allow randomisation to consume up to 16T
38 # of address space (2^44). Only 4K page sizes are supported.
39 default 32 if 64BIT # 32 = 44 (16T) - 12 (4K)
40 #
41 # For 32-bit, use the compat values, as they're the same.
42 default ARCH_MMAP_RND_COMPAT_BITS_MAX
44 config ARCH_MMAP_RND_BITS_MIN
45 # Allow randomisation to consume up to 1GB of address space (2^30).
46 default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K)
47 default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K)
48 #
49 # For 32-bit, use the compat values, as they're the same.
50 default ARCH_MMAP_RND_COMPAT_BITS_MIN
52 config ARCH_MMAP_RND_COMPAT_BITS_MAX
53 # Total virtual address space for 32-bit processes is 2^31 (2GB).
54 # Allow randomisation to consume up to 512MB of address space (2^29).
55 default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K)
56 default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K)
57 default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K)
58 default 17 # 17 = 29 (512MB) - 12 (4K)
60 config ARCH_MMAP_RND_COMPAT_BITS_MIN
61 # Total virtual address space for 32-bit processes is 2^31 (2GB).
62 # Allow randomisation to consume up to 8MB of address space (2^23).
63 default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K)
64 default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K)
65 default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K)
66 default 11 # 11 = 23 (8MB) - 12 (4K)
68 config HAVE_SETUP_PER_CPU_AREA
69 def_bool PPC64
71 config NEED_PER_CPU_EMBED_FIRST_CHUNK
72 def_bool PPC64
74 config NR_IRQS
75 int "Number of virtual interrupt numbers"
76 range 32 32768
77 default "512"
78 help
79 This defines the number of virtual interrupt numbers the kernel
80 can manage. Virtual interrupt numbers are what you see in
81 /proc/interrupts. If you configure your system to have too few,
82 drivers will fail to load or worse - handle with care.
84 config NMI_IPI
85 bool
86 depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
87 default y
89 config PPC_WATCHDOG
90 bool
91 depends on HARDLOCKUP_DETECTOR
92 depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
93 default y
94 help
95 This is a placeholder when the powerpc hardlockup detector
96 watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
97 seleted via the generic lockup detector menu which is why we
98 have no standalone config option for it here.
100 config STACKTRACE_SUPPORT
101 bool
102 default y
104 config TRACE_IRQFLAGS_SUPPORT
105 bool
106 default y
108 config LOCKDEP_SUPPORT
109 bool
110 default y
112 config RWSEM_GENERIC_SPINLOCK
113 bool
115 config RWSEM_XCHGADD_ALGORITHM
116 bool
117 default y
119 config GENERIC_LOCKBREAK
120 bool
121 default y
122 depends on SMP && PREEMPT
124 config GENERIC_HWEIGHT
125 bool
126 default y
128 config ARCH_HAS_DMA_SET_COHERENT_MASK
129 bool
131 config PPC
132 bool
133 default y
134 #
135 # Please keep this list sorted alphabetically.
136 #
137 select ARCH_HAS_DEVMEM_IS_ALLOWED
138 select ARCH_HAS_DMA_SET_COHERENT_MASK
139 select ARCH_HAS_ELF_RANDOMIZE
140 select ARCH_HAS_FORTIFY_SOURCE
141 select ARCH_HAS_GCOV_PROFILE_ALL
142 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
143 select ARCH_HAS_SG_CHAIN
144 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
145 select ARCH_HAS_UBSAN_SANITIZE_ALL
146 select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64
147 select ARCH_HAVE_NMI_SAFE_CMPXCHG
148 select ARCH_MIGHT_HAVE_PC_PARPORT
149 select ARCH_MIGHT_HAVE_PC_SERIO
150 select ARCH_SUPPORTS_ATOMIC_RMW
151 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
152 select ARCH_USE_BUILTIN_BSWAP
153 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
154 select ARCH_WANT_IPC_PARSE_VERSION
155 select ARCH_WEAK_RELEASE_ACQUIRE
156 select BINFMT_ELF
157 select BUILDTIME_EXTABLE_SORT
158 select CLONE_BACKWARDS
159 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
160 select EDAC_ATOMIC_SCRUB
161 select EDAC_SUPPORT
162 select GENERIC_ATOMIC64 if PPC32
163 select GENERIC_CLOCKEVENTS
164 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
165 select GENERIC_CMOS_UPDATE
166 select GENERIC_CPU_AUTOPROBE
167 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC
168 select GENERIC_IRQ_SHOW
169 select GENERIC_IRQ_SHOW_LEVEL
170 select GENERIC_SMP_IDLE_THREAD
171 select GENERIC_STRNCPY_FROM_USER
172 select GENERIC_STRNLEN_USER
173 select GENERIC_TIME_VSYSCALL
174 select HAVE_ARCH_AUDITSYSCALL
175 select HAVE_ARCH_JUMP_LABEL
176 select HAVE_ARCH_KGDB
177 select HAVE_ARCH_MMAP_RND_BITS
178 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
179 select HAVE_ARCH_SECCOMP_FILTER
180 select HAVE_ARCH_TRACEHOOK
181 select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION)
182 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
183 select HAVE_CBPF_JIT if !PPC64
184 select HAVE_CONTEXT_TRACKING if PPC64
185 select HAVE_DEBUG_KMEMLEAK
186 select HAVE_DEBUG_STACKOVERFLOW
187 select HAVE_DMA_API_DEBUG
188 select HAVE_DYNAMIC_FTRACE
189 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
190 select HAVE_EBPF_JIT if PPC64
191 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
192 select HAVE_FTRACE_MCOUNT_RECORD
193 select HAVE_FUNCTION_GRAPH_TRACER
194 select HAVE_FUNCTION_TRACER
195 select HAVE_GCC_PLUGINS
196 select HAVE_GENERIC_GUP
197 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
198 select HAVE_IDE
199 select HAVE_IOREMAP_PROT
200 select HAVE_IRQ_EXIT_ON_IRQ_STACK
201 select HAVE_KERNEL_GZIP
202 select HAVE_KPROBES
203 select HAVE_KPROBES_ON_FTRACE
204 select HAVE_KRETPROBES
205 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
206 select HAVE_MEMBLOCK
207 select HAVE_MEMBLOCK_NODE_MAP
208 select HAVE_MOD_ARCH_SPECIFIC
209 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
210 select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S)
211 select HAVE_OPROFILE
212 select HAVE_OPTPROBES if PPC64
213 select HAVE_PERF_EVENTS
214 select HAVE_PERF_EVENTS_NMI if PPC64
215 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
216 select HAVE_PERF_REGS
217 select HAVE_PERF_USER_STACK_DUMP
218 select HAVE_RCU_TABLE_FREE if SMP
219 select HAVE_REGS_AND_STACK_ACCESS_API
220 select HAVE_SYSCALL_TRACEPOINTS
221 select HAVE_VIRT_CPU_ACCOUNTING
222 select HAVE_IRQ_TIME_ACCOUNTING
223 select IRQ_DOMAIN
224 select IRQ_FORCED_THREADING
225 select MODULES_USE_ELF_RELA
226 select NO_BOOTMEM
227 select OF
228 select OF_EARLY_FLATTREE
229 select OF_RESERVED_MEM
230 select OLD_SIGACTION if PPC32
231 select OLD_SIGSUSPEND
232 select SPARSE_IRQ
233 select SYSCTL_EXCEPTION_TRACE
234 select VIRT_TO_BUS if !PPC64
235 #
236 # Please keep this list sorted alphabetically.
237 #
239 config PPC_BARRIER_NOSPEC
240 bool
241 default y
242 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
244 config GENERIC_CSUM
245 def_bool n
247 config EARLY_PRINTK
248 bool
249 default y
251 config PANIC_TIMEOUT
252 int
253 default 180
255 config COMPAT
256 bool
257 default y if PPC64
258 select COMPAT_BINFMT_ELF
259 select ARCH_WANT_OLD_COMPAT_IPC
260 select COMPAT_OLD_SIGACTION
262 config SYSVIPC_COMPAT
263 bool
264 depends on COMPAT && SYSVIPC
265 default y
267 # All PPC32s use generic nvram driver through ppc_md
268 config GENERIC_NVRAM
269 bool
270 default y if PPC32
272 config SCHED_OMIT_FRAME_POINTER
273 bool
274 default y
276 config ARCH_MAY_HAVE_PC_FDC
277 bool
278 default PCI
280 config PPC_UDBG_16550
281 bool
282 default n
284 config GENERIC_TBSYNC
285 bool
286 default y if PPC32 && SMP
287 default n
289 config AUDIT_ARCH
290 bool
291 default y
293 config GENERIC_BUG
294 bool
295 default y
296 depends on BUG
298 config SYS_SUPPORTS_APM_EMULATION
299 default y if PMAC_APM_EMU
300 bool
302 config EPAPR_BOOT
303 bool
304 help
305 Used to allow a board to specify it wants an ePAPR compliant wrapper.
306 default n
308 config DEFAULT_UIMAGE
309 bool
310 help
311 Used to allow a board to specify it wants a uImage built by default
312 default n
314 config ARCH_HIBERNATION_POSSIBLE
315 bool
316 default y
318 config ARCH_SUSPEND_POSSIBLE
319 def_bool y
320 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
321 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
322 || 44x || 40x
324 config PPC_DCR_NATIVE
325 bool
326 default n
328 config PPC_DCR_MMIO
329 bool
330 default n
332 config PPC_DCR
333 bool
334 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
335 default y
337 config PPC_OF_PLATFORM_PCI
338 bool
339 depends on PCI
340 depends on PPC64 # not supported on 32 bits yet
341 default n
343 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
344 depends on PPC32 || PPC_STD_MMU_64
345 def_bool y
347 config ARCH_SUPPORTS_UPROBES
348 def_bool y
350 config PPC_ADV_DEBUG_REGS
351 bool
352 depends on 40x || BOOKE
353 default y
355 config PPC_ADV_DEBUG_IACS
356 int
357 depends on PPC_ADV_DEBUG_REGS
358 default 4 if 44x
359 default 2
361 config PPC_ADV_DEBUG_DACS
362 int
363 depends on PPC_ADV_DEBUG_REGS
364 default 2
366 config PPC_ADV_DEBUG_DVCS
367 int
368 depends on PPC_ADV_DEBUG_REGS
369 default 2 if 44x
370 default 0
372 config PPC_ADV_DEBUG_DAC_RANGE
373 bool
374 depends on PPC_ADV_DEBUG_REGS && 44x
375 default y
377 config ZONE_DMA32
378 bool
379 default y if PPC64
381 config PGTABLE_LEVELS
382 int
383 default 2 if !PPC64
384 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
385 default 4
387 source "init/Kconfig"
389 source "kernel/Kconfig.freezer"
391 source "arch/powerpc/sysdev/Kconfig"
392 source "arch/powerpc/platforms/Kconfig"
394 menu "Kernel options"
396 config HIGHMEM
397 bool "High memory support"
398 depends on PPC32
400 source kernel/Kconfig.hz
401 source kernel/Kconfig.preempt
402 source "fs/Kconfig.binfmt"
404 config HUGETLB_PAGE_SIZE_VARIABLE
405 bool
406 depends on HUGETLB_PAGE
407 default y
409 config MATH_EMULATION
410 bool "Math emulation"
411 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
412 ---help---
413 Some PowerPC chips designed for embedded applications do not have
414 a floating-point unit and therefore do not implement the
415 floating-point instructions in the PowerPC instruction set. If you
416 say Y here, the kernel will include code to emulate a floating-point
417 unit, which will allow programs that use floating-point
418 instructions to run.
420 This is also useful to emulate missing (optional) instructions
421 such as fsqrt on cores that do have an FPU but do not implement
422 them (such as Freescale BookE).
424 choice
425 prompt "Math emulation options"
426 default MATH_EMULATION_FULL
427 depends on MATH_EMULATION
429 config MATH_EMULATION_FULL
430 bool "Emulate all the floating point instructions"
431 ---help---
432 Select this option will enable the kernel to support to emulate
433 all the floating point instructions. If your SoC doesn't have
434 a FPU, you should select this.
436 config MATH_EMULATION_HW_UNIMPLEMENTED
437 bool "Just emulate the FPU unimplemented instructions"
438 ---help---
439 Select this if you know there does have a hardware FPU on your
440 SoC, but some floating point instructions are not implemented by that.
442 endchoice
444 config PPC_TRANSACTIONAL_MEM
445 bool "Transactional Memory support for POWERPC"
446 depends on PPC_BOOK3S_64
447 depends on SMP
448 select ALTIVEC
449 select VSX
450 default n
451 ---help---
452 Support user-mode Transactional Memory on POWERPC.
454 config LD_HEAD_STUB_CATCH
455 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
456 depends on PPC64
457 default n
458 help
459 Very large kernels can cause linker branch stubs to be generated by
460 code in head_64.S, which moves the head text sections out of their
461 specified location. This option can work around the problem.
463 If unsure, say "N".
465 config DISABLE_MPROFILE_KERNEL
466 bool "Disable use of mprofile-kernel for kernel tracing"
467 depends on PPC64 && CPU_LITTLE_ENDIAN
468 default y
469 help
470 Selecting this options disables use of the mprofile-kernel ABI for
471 kernel tracing. That will cause options such as live patching
472 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
473 be disabled also.
475 If you have a toolchain which supports mprofile-kernel, then you can
476 disable this. Otherwise leave it enabled. If you're not sure, say
477 "Y".
479 config MPROFILE_KERNEL
480 depends on PPC64 && CPU_LITTLE_ENDIAN
481 def_bool !DISABLE_MPROFILE_KERNEL
483 config IOMMU_HELPER
484 def_bool PPC64
486 config SWIOTLB
487 bool "SWIOTLB support"
488 default n
489 select IOMMU_HELPER
490 ---help---
491 Support for IO bounce buffering for systems without an IOMMU.
492 This allows us to DMA to the full physical address space on
493 platforms where the size of a physical address is larger
494 than the bus address. Not all platforms support this.
496 config HOTPLUG_CPU
497 bool "Support for enabling/disabling CPUs"
498 depends on SMP && (PPC_PSERIES || \
499 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
500 ---help---
501 Say Y here to be able to disable and re-enable individual
502 CPUs at runtime on SMP machines.
504 Say N if you are unsure.
506 config ARCH_CPU_PROBE_RELEASE
507 def_bool y
508 depends on HOTPLUG_CPU
510 config ARCH_ENABLE_MEMORY_HOTPLUG
511 def_bool y
513 config ARCH_HAS_WALK_MEMORY
514 def_bool y
516 config ARCH_ENABLE_MEMORY_HOTREMOVE
517 def_bool y
519 config PPC64_SUPPORTS_MEMORY_FAILURE
520 bool "Add support for memory hwpoison"
521 depends on PPC_BOOK3S_64
522 default "y" if PPC_POWERNV
523 select ARCH_SUPPORTS_MEMORY_FAILURE
525 config KEXEC
526 bool "kexec system call"
527 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
528 select KEXEC_CORE
529 help
530 kexec is a system call that implements the ability to shutdown your
531 current kernel, and to start another kernel. It is like a reboot
532 but it is independent of the system firmware. And like a reboot
533 you can start any kernel with it, not just Linux.
535 The name comes from the similarity to the exec system call.
537 It is an ongoing process to be certain the hardware in a machine
538 is properly shutdown, so do not be surprised if this code does not
539 initially work for you. As of this writing the exact hardware
540 interface is strongly in flux, so no good recommendation can be
541 made.
543 config KEXEC_FILE
544 bool "kexec file based system call"
545 select KEXEC_CORE
546 select HAVE_IMA_KEXEC
547 select BUILD_BIN2C
548 depends on PPC64
549 depends on CRYPTO=y
550 depends on CRYPTO_SHA256=y
551 help
552 This is a new version of the kexec system call. This call is
553 file based and takes in file descriptors as system call arguments
554 for kernel and initramfs as opposed to a list of segments as is the
555 case for the older kexec call.
557 config RELOCATABLE
558 bool "Build a relocatable kernel"
559 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
560 select NONSTATIC_KERNEL
561 select MODULE_REL_CRCS if MODVERSIONS
562 help
563 This builds a kernel image that is capable of running at the
564 location the kernel is loaded at. For ppc32, there is no any
565 alignment restrictions, and this feature is a superset of
566 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
567 16k-aligned base address. The kernel is linked as a
568 position-independent executable (PIE) and contains dynamic relocations
569 which are processed early in the bootup process.
571 One use is for the kexec on panic case where the recovery kernel
572 must live at a different physical address than the primary
573 kernel.
575 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
576 it has been loaded at and the compile time physical addresses
577 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
578 setting can still be useful to bootwrappers that need to know the
579 load address of the kernel (eg. u-boot/mkimage).
581 config RELOCATABLE_TEST
582 bool "Test relocatable kernel"
583 depends on (PPC64 && RELOCATABLE)
584 default n
585 help
586 This runs the relocatable kernel at the address it was initially
587 loaded at, which tends to be non-zero and therefore test the
588 relocation code.
590 config CRASH_DUMP
591 bool "Build a dump capture kernel"
592 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
593 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
594 help
595 Build a kernel suitable for use as a dump capture kernel.
596 The same kernel binary can be used as production kernel and dump
597 capture kernel.
599 config FA_DUMP
600 bool "Firmware-assisted dump"
601 depends on PPC64 && PPC_RTAS
602 select CRASH_CORE
603 select CRASH_DUMP
604 help
605 A robust mechanism to get reliable kernel crash dump with
606 assistance from firmware. This approach does not use kexec,
607 instead firmware assists in booting the capture kernel
608 while preserving memory contents. Firmware-assisted dump
609 is meant to be a kdump replacement offering robustness and
610 speed not possible without system firmware assistance.
612 If unsure, say "N"
614 config IRQ_ALL_CPUS
615 bool "Distribute interrupts on all CPUs by default"
616 depends on SMP
617 help
618 This option gives the kernel permission to distribute IRQs across
619 multiple CPUs. Saying N here will route all IRQs to the first
620 CPU. Generally saying Y is safe, although some problems have been
621 reported with SMP Power Macintoshes with this option enabled.
623 config NUMA
624 bool "NUMA support"
625 depends on PPC64
626 default y if SMP && PPC_PSERIES
628 config NODES_SHIFT
629 int
630 default "8" if PPC64
631 default "4"
632 depends on NEED_MULTIPLE_NODES
634 config USE_PERCPU_NUMA_NODE_ID
635 def_bool y
636 depends on NUMA
638 config HAVE_MEMORYLESS_NODES
639 def_bool y
640 depends on NUMA
642 config ARCH_SELECT_MEMORY_MODEL
643 def_bool y
644 depends on PPC64
646 config ARCH_FLATMEM_ENABLE
647 def_bool y
648 depends on (PPC64 && !NUMA) || PPC32
650 config ARCH_SPARSEMEM_ENABLE
651 def_bool y
652 depends on PPC64
653 select SPARSEMEM_VMEMMAP_ENABLE
655 config ARCH_SPARSEMEM_DEFAULT
656 def_bool y
657 depends on PPC_BOOK3S_64
659 config SYS_SUPPORTS_HUGETLBFS
660 bool
662 config ILLEGAL_POINTER_VALUE
663 hex
664 # This is roughly half way between the top of user space and the bottom
665 # of kernel space, which seems about as good as we can get.
666 default 0x5deadbeef0000000 if PPC64
667 default 0
669 source "mm/Kconfig"
671 config ARCH_MEMORY_PROBE
672 def_bool y
673 depends on MEMORY_HOTPLUG
675 # Some NUMA nodes have memory ranges that span
676 # other nodes. Even though a pfn is valid and
677 # between a node's start and end pfns, it may not
678 # reside on that node. See memmap_init_zone()
679 # for details.
680 config NODES_SPAN_OTHER_NODES
681 def_bool y
682 depends on NEED_MULTIPLE_NODES
684 config STDBINUTILS
685 bool "Using standard binutils settings"
686 depends on 44x
687 default y
688 help
689 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
690 Note, that kernel will be able to run only those applications,
691 which had been compiled using binutils later than 2.17.50.0.3 with
692 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
693 the older binutils, you can patch them with a trivial patch, which
694 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
696 choice
697 prompt "Page size"
698 default PPC_4K_PAGES
699 help
700 Select the kernel logical page size. Increasing the page size
701 will reduce software overhead at each page boundary, allow
702 hardware prefetch mechanisms to be more effective, and allow
703 larger dma transfers increasing IO efficiency and reducing
704 overhead. However the utilization of memory will increase.
705 For example, each cached file will using a multiple of the
706 page size to hold its contents and the difference between the
707 end of file and the end of page is wasted.
709 Some dedicated systems, such as software raid serving with
710 accelerated calculations, have shown significant increases.
712 If you configure a 64 bit kernel for 64k pages but the
713 processor does not support them, then the kernel will simulate
714 them with 4k pages, loading them on demand, but with the
715 reduced software overhead and larger internal fragmentation.
716 For the 32 bit kernel, a large page option will not be offered
717 unless it is supported by the configured processor.
719 If unsure, choose 4K_PAGES.
721 config PPC_4K_PAGES
722 bool "4k page size"
723 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
725 config PPC_16K_PAGES
726 bool "16k page size"
727 depends on 44x || PPC_8xx
729 config PPC_64K_PAGES
730 bool "64k page size"
731 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
732 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
734 config PPC_256K_PAGES
735 bool "256k page size"
736 depends on 44x && !STDBINUTILS
737 help
738 Make the page size 256k.
740 As the ELF standard only requires alignment to support page
741 sizes up to 64k, you will need to compile all of your user
742 space applications with a non-standard binutils settings
743 (see the STDBINUTILS description for details).
745 Say N unless you know what you are doing.
747 endchoice
749 config THREAD_SHIFT
750 int "Thread shift" if EXPERT
751 range 13 15
752 default "15" if PPC_256K_PAGES
753 default "14" if PPC64
754 default "13"
755 help
756 Used to define the stack size. The default is almost always what you
757 want. Only change this if you know what you are doing.
759 config FORCE_MAX_ZONEORDER
760 int "Maximum zone order"
761 range 8 9 if PPC64 && PPC_64K_PAGES
762 default "9" if PPC64 && PPC_64K_PAGES
763 range 13 13 if PPC64 && !PPC_64K_PAGES
764 default "13" if PPC64 && !PPC_64K_PAGES
765 range 9 64 if PPC32 && PPC_16K_PAGES
766 default "9" if PPC32 && PPC_16K_PAGES
767 range 7 64 if PPC32 && PPC_64K_PAGES
768 default "7" if PPC32 && PPC_64K_PAGES
769 range 5 64 if PPC32 && PPC_256K_PAGES
770 default "5" if PPC32 && PPC_256K_PAGES
771 range 11 64
772 default "11"
773 help
774 The kernel memory allocator divides physically contiguous memory
775 blocks into "zones", where each zone is a power of two number of
776 pages. This option selects the largest power of two that the kernel
777 keeps in the memory allocator. If you need to allocate very large
778 blocks of physically contiguous memory, then you may need to
779 increase this value.
781 This config option is actually maximum order plus one. For example,
782 a value of 11 means that the largest free memory block is 2^10 pages.
784 The page size is not necessarily 4KB. For example, on 64-bit
785 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
786 this in mind when choosing a value for this option.
788 config PPC_SUBPAGE_PROT
789 bool "Support setting protections for 4k subpages"
790 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
791 help
792 This option adds support for a system call to allow user programs
793 to set access permissions (read/write, readonly, or no access)
794 on the 4k subpages of each 64k page.
796 config PPC_COPRO_BASE
797 bool
798 default n
800 config SCHED_SMT
801 bool "SMT (Hyperthreading) scheduler support"
802 depends on PPC64 && SMP
803 help
804 SMT scheduler support improves the CPU scheduler's decision making
805 when dealing with POWER5 cpus at a cost of slightly increased
806 overhead in some places. If unsure say N here.
808 config PPC_DENORMALISATION
809 bool "PowerPC denormalisation exception handling"
810 depends on PPC_BOOK3S_64
811 default "y" if PPC_POWERNV
812 ---help---
813 Add support for handling denormalisation of single precision
814 values. Useful for bare metal only. If unsure say Y here.
816 config CMDLINE_BOOL
817 bool "Default bootloader kernel arguments"
819 config CMDLINE
820 string "Initial kernel command string"
821 depends on CMDLINE_BOOL
822 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
823 help
824 On some platforms, there is currently no way for the boot loader to
825 pass arguments to the kernel. For these platforms, you can supply
826 some command-line options at build time by entering them here. In
827 most cases you will need to specify the root device here.
829 config CMDLINE_FORCE
830 bool "Always use the default kernel command string"
831 depends on CMDLINE_BOOL
832 help
833 Always use the default kernel command string, even if the boot
834 loader passes other arguments to the kernel.
835 This is useful if you cannot or don't want to change the
836 command-line options your boot loader passes to the kernel.
838 config EXTRA_TARGETS
839 string "Additional default image types"
840 help
841 List additional targets to be built by the bootwrapper here (separated
842 by spaces). This is useful for targets that depend of device tree
843 files in the .dts directory.
845 Targets in this list will be build as part of the default build
846 target, or when the user does a 'make zImage' or a
847 'make zImage.initrd'.
849 If unsure, leave blank
851 config ARCH_WANTS_FREEZER_CONTROL
852 def_bool y
853 depends on ADB_PMU
855 source kernel/power/Kconfig
857 config SECCOMP
858 bool "Enable seccomp to safely compute untrusted bytecode"
859 depends on PROC_FS
860 default y
861 help
862 This kernel feature is useful for number crunching applications
863 that may need to compute untrusted bytecode during their
864 execution. By using pipes or other transports made available to
865 the process as file descriptors supporting the read/write
866 syscalls, it's possible to isolate those applications in
867 their own address space using seccomp. Once seccomp is
868 enabled via /proc/<pid>/seccomp, it cannot be disabled
869 and the task is only allowed to execute a few safe syscalls
870 defined by each seccomp mode.
872 If unsure, say Y. Only embedded should say N here.
874 endmenu
876 config ISA_DMA_API
877 bool
878 default PCI
880 menu "Bus options"
882 config ISA
883 bool "Support for ISA-bus hardware"
884 depends on PPC_CHRP
885 select PPC_I8259
886 help
887 Find out whether you have ISA slots on your motherboard. ISA is the
888 name of a bus system, i.e. the way the CPU talks to the other stuff
889 inside your box. If you have an Apple machine, say N here; if you
890 have an IBM RS/6000 or pSeries machine, say Y. If you have an
891 embedded board, consult your board documentation.
893 config ZONE_DMA
894 bool
895 default y
897 config NEED_DMA_MAP_STATE
898 def_bool (PPC64 || NOT_COHERENT_CACHE)
900 config NEED_SG_DMA_LENGTH
901 def_bool y
903 config GENERIC_ISA_DMA
904 bool
905 depends on ISA_DMA_API
906 default y
908 config PPC_INDIRECT_PCI
909 bool
910 depends on PCI
911 default y if 40x || 44x
912 default n
914 config EISA
915 bool
917 config SBUS
918 bool
920 config FSL_SOC
921 bool
923 config FSL_PCI
924 bool
925 select PPC_INDIRECT_PCI
926 select PCI_QUIRKS
928 config FSL_PMC
929 bool
930 default y
931 depends on SUSPEND && (PPC_85xx || PPC_86xx)
932 help
933 Freescale MPC85xx/MPC86xx power management controller support
934 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
936 config PPC4xx_CPM
937 bool
938 default y
939 depends on SUSPEND && (44x || 40x)
940 help
941 PPC4xx Clock Power Management (CPM) support (suspend/resume).
942 It also enables support for two different idle states (idle-wait
943 and idle-doze).
945 config 4xx_SOC
946 bool
948 config FSL_LBC
949 bool "Freescale Local Bus support"
950 help
951 Enables reporting of errors from the Freescale local bus
952 controller. Also contains some common code used by
953 drivers for specific local bus peripherals.
955 config FSL_GTM
956 bool
957 depends on PPC_83xx || QUICC_ENGINE || CPM2
958 help
959 Freescale General-purpose Timers support
961 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
962 config MCA
963 bool
965 # Platforms that what PCI turned unconditionally just do select PCI
966 # in their config node. Platforms that want to choose at config
967 # time should select PPC_PCI_CHOICE
968 config PPC_PCI_CHOICE
969 bool
971 config PCI
972 bool "PCI support" if PPC_PCI_CHOICE
973 default y if !40x && !CPM2 && !PPC_8xx && !PPC_83xx \
974 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
975 default PCI_QSPAN if PPC_8xx
976 select GENERIC_PCI_IOMAP
977 help
978 Find out whether your system includes a PCI bus. PCI is the name of
979 a bus system, i.e. the way the CPU talks to the other stuff inside
980 your box. If you say Y here, the kernel will include drivers and
981 infrastructure code to support PCI bus devices.
983 config PCI_DOMAINS
984 def_bool PCI
986 config PCI_SYSCALL
987 def_bool PCI
989 config PCI_QSPAN
990 bool "QSpan PCI"
991 depends on PPC_8xx
992 select PPC_I8259
993 help
994 Say Y here if you have a system based on a Motorola 8xx-series
995 embedded processor with a QSPAN PCI interface, otherwise say N.
997 config PCI_8260
998 bool
999 depends on PCI && 8260
1000 select PPC_INDIRECT_PCI
1001 default y
1003 source "drivers/pci/Kconfig"
1005 source "drivers/pcmcia/Kconfig"
1007 config HAS_RAPIDIO
1008 bool
1009 default n
1011 config RAPIDIO
1012 tristate "RapidIO support"
1013 depends on HAS_RAPIDIO || PCI
1014 help
1015 If you say Y here, the kernel will include drivers and
1016 infrastructure code to support RapidIO interconnect devices.
1018 config FSL_RIO
1019 bool "Freescale Embedded SRIO Controller support"
1020 depends on RAPIDIO = y && HAS_RAPIDIO
1021 default "n"
1022 ---help---
1023 Include support for RapidIO controller on Freescale embedded
1024 processors (MPC8548, MPC8641, etc).
1026 source "drivers/rapidio/Kconfig"
1028 endmenu
1030 config NONSTATIC_KERNEL
1031 bool
1032 default n
1034 menu "Advanced setup"
1035 depends on PPC32
1037 config ADVANCED_OPTIONS
1038 bool "Prompt for advanced kernel configuration options"
1039 help
1040 This option will enable prompting for a variety of advanced kernel
1041 configuration options. These options can cause the kernel to not
1042 work if they are set incorrectly, but can be used to optimize certain
1043 aspects of kernel memory management.
1045 Unless you know what you are doing, say N here.
1047 comment "Default settings for advanced configuration options are used"
1048 depends on !ADVANCED_OPTIONS
1050 config LOWMEM_SIZE_BOOL
1051 bool "Set maximum low memory"
1052 depends on ADVANCED_OPTIONS
1053 help
1054 This option allows you to set the maximum amount of memory which
1055 will be used as "low memory", that is, memory which the kernel can
1056 access directly, without having to set up a kernel virtual mapping.
1057 This can be useful in optimizing the layout of kernel virtual
1058 memory.
1060 Say N here unless you know what you are doing.
1062 config LOWMEM_SIZE
1063 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1064 default "0x30000000"
1066 config LOWMEM_CAM_NUM_BOOL
1067 bool "Set number of CAMs to use to map low memory"
1068 depends on ADVANCED_OPTIONS && FSL_BOOKE
1069 help
1070 This option allows you to set the maximum number of CAM slots that
1071 will be used to map low memory. There are a limited number of slots
1072 available and even more limited number that will fit in the L1 MMU.
1073 However, using more entries will allow mapping more low memory. This
1074 can be useful in optimizing the layout of kernel virtual memory.
1076 Say N here unless you know what you are doing.
1078 config LOWMEM_CAM_NUM
1079 depends on FSL_BOOKE
1080 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1081 default 3
1083 config DYNAMIC_MEMSTART
1084 bool "Enable page aligned dynamic load address for kernel"
1085 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1086 select NONSTATIC_KERNEL
1087 help
1088 This option enables the kernel to be loaded at any page aligned
1089 physical address. The kernel creates a mapping from KERNELBASE to
1090 the address where the kernel is loaded. The page size here implies
1091 the TLB page size of the mapping for kernel on the particular platform.
1092 Please refer to the init code for finding the TLB page size.
1094 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1095 kernel image, where the only restriction is the page aligned kernel
1096 load address. When this option is enabled, the compile time physical
1097 address CONFIG_PHYSICAL_START is ignored.
1099 This option is overridden by CONFIG_RELOCATABLE
1101 config PAGE_OFFSET_BOOL
1102 bool "Set custom page offset address"
1103 depends on ADVANCED_OPTIONS
1104 help
1105 This option allows you to set the kernel virtual address at which
1106 the kernel will map low memory. This can be useful in optimizing
1107 the virtual memory layout of the system.
1109 Say N here unless you know what you are doing.
1111 config PAGE_OFFSET
1112 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1113 default "0xc0000000"
1115 config KERNEL_START_BOOL
1116 bool "Set custom kernel base address"
1117 depends on ADVANCED_OPTIONS
1118 help
1119 This option allows you to set the kernel virtual address at which
1120 the kernel will be loaded. Normally this should match PAGE_OFFSET
1121 however there are times (like kdump) that one might not want them
1122 to be the same.
1124 Say N here unless you know what you are doing.
1126 config KERNEL_START
1127 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1128 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1129 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1130 default "0xc0000000"
1132 config PHYSICAL_START_BOOL
1133 bool "Set physical address where the kernel is loaded"
1134 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1135 help
1136 This gives the physical address where the kernel is loaded.
1138 Say N here unless you know what you are doing.
1140 config PHYSICAL_START
1141 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1142 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1143 default "0x00000000"
1145 config PHYSICAL_ALIGN
1146 hex
1147 default "0x04000000" if FSL_BOOKE
1148 help
1149 This value puts the alignment restrictions on physical address
1150 where kernel is loaded and run from. Kernel is compiled for an
1151 address which meets above alignment restriction.
1153 config TASK_SIZE_BOOL
1154 bool "Set custom user task size"
1155 depends on ADVANCED_OPTIONS
1156 help
1157 This option allows you to set the amount of virtual address space
1158 allocated to user tasks. This can be useful in optimizing the
1159 virtual memory layout of the system.
1161 Say N here unless you know what you are doing.
1163 config TASK_SIZE
1164 hex "Size of user task space" if TASK_SIZE_BOOL
1165 default "0x80000000" if PPC_8xx
1166 default "0xc0000000"
1168 config CONSISTENT_SIZE_BOOL
1169 bool "Set custom consistent memory pool size"
1170 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1171 help
1172 This option allows you to set the size of the
1173 consistent memory pool. This pool of virtual memory
1174 is used to make consistent memory allocations.
1176 config CONSISTENT_SIZE
1177 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1178 default "0x00200000" if NOT_COHERENT_CACHE
1180 config PIN_TLB
1181 bool "Pinned Kernel TLBs (860 ONLY)"
1182 depends on ADVANCED_OPTIONS && PPC_8xx && \
1183 !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
1185 config PIN_TLB_DATA
1186 bool "Pinned TLB for DATA"
1187 depends on PIN_TLB
1188 default y
1190 config PIN_TLB_IMMR
1191 bool "Pinned TLB for IMMR"
1192 depends on PIN_TLB
1193 default y
1195 config PIN_TLB_TEXT
1196 bool "Pinned TLB for TEXT"
1197 depends on PIN_TLB
1198 default y
1199 endmenu
1201 if PPC64
1202 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1203 config PAGE_OFFSET
1204 hex
1205 default "0xc000000000000000"
1206 config KERNEL_START
1207 hex
1208 default "0xc000000000000000"
1209 config PHYSICAL_START
1210 hex
1211 default "0x00000000"
1212 endif
1214 config ARCH_RANDOM
1215 def_bool n
1217 source "net/Kconfig"
1219 source "drivers/Kconfig"
1221 source "fs/Kconfig"
1223 source "lib/Kconfig"
1225 source "arch/powerpc/Kconfig.debug"
1227 source "security/Kconfig"
1229 source "crypto/Kconfig"
1231 config PPC_LIB_RHEAP
1232 bool
1234 source "arch/powerpc/kvm/Kconfig"
1236 source "kernel/livepatch/Kconfig"