| blob | 73ce5dd076420720822890ab8425632d3632870c |
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_PHYS_TO_DMA
143 select ARCH_HAS_PMEM_API if PPC64
144 select ARCH_HAS_MEMBARRIER_CALLBACKS
145 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
146 select ARCH_HAS_SG_CHAIN
147 select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION)
148 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
149 select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64
150 select ARCH_HAS_UBSAN_SANITIZE_ALL
151 select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64
152 select ARCH_HAVE_NMI_SAFE_CMPXCHG
153 select ARCH_MIGHT_HAVE_PC_PARPORT
154 select ARCH_MIGHT_HAVE_PC_SERIO
155 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
156 select ARCH_SUPPORTS_ATOMIC_RMW
157 select ARCH_USE_BUILTIN_BSWAP
158 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
159 select ARCH_WANT_IPC_PARSE_VERSION
160 select ARCH_WEAK_RELEASE_ACQUIRE
161 select BINFMT_ELF
162 select BUILDTIME_EXTABLE_SORT
163 select CLONE_BACKWARDS
164 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
165 select EDAC_ATOMIC_SCRUB
166 select EDAC_SUPPORT
167 select GENERIC_ATOMIC64 if PPC32
168 select GENERIC_CLOCKEVENTS
169 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
170 select GENERIC_CMOS_UPDATE
171 select GENERIC_CPU_AUTOPROBE
172 select GENERIC_CPU_VULNERABILITIES if PPC_BOOK3S_64
173 select GENERIC_IRQ_SHOW
174 select GENERIC_IRQ_SHOW_LEVEL
175 select GENERIC_SMP_IDLE_THREAD
176 select GENERIC_STRNCPY_FROM_USER
177 select GENERIC_STRNLEN_USER
178 select GENERIC_TIME_VSYSCALL
179 select HAVE_ARCH_AUDITSYSCALL
180 select HAVE_ARCH_JUMP_LABEL
181 select HAVE_ARCH_KGDB
182 select HAVE_ARCH_MMAP_RND_BITS
183 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
184 select HAVE_ARCH_SECCOMP_FILTER
185 select HAVE_ARCH_TRACEHOOK
186 select HAVE_CBPF_JIT if !PPC64
187 select HAVE_CONTEXT_TRACKING if PPC64
188 select HAVE_DEBUG_KMEMLEAK
189 select HAVE_DEBUG_STACKOVERFLOW
190 select HAVE_DMA_API_DEBUG
191 select HAVE_DYNAMIC_FTRACE
192 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
193 select HAVE_EBPF_JIT if PPC64
194 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
195 select HAVE_FTRACE_MCOUNT_RECORD
196 select HAVE_FUNCTION_GRAPH_TRACER
197 select HAVE_FUNCTION_TRACER
198 select HAVE_GCC_PLUGINS
199 select HAVE_GENERIC_GUP
200 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
201 select HAVE_IDE
202 select HAVE_IOREMAP_PROT
203 select HAVE_IRQ_EXIT_ON_IRQ_STACK
204 select HAVE_KERNEL_GZIP
205 select HAVE_KPROBES
206 select HAVE_KPROBES_ON_FTRACE
207 select HAVE_KRETPROBES
208 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
209 select HAVE_MEMBLOCK
210 select HAVE_MEMBLOCK_NODE_MAP
211 select HAVE_MOD_ARCH_SPECIFIC
212 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
213 select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S)
214 select HAVE_OPROFILE
215 select HAVE_OPTPROBES if PPC64
216 select HAVE_PERF_EVENTS
217 select HAVE_PERF_EVENTS_NMI if PPC64
218 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
219 select HAVE_PERF_REGS
220 select HAVE_PERF_USER_STACK_DUMP
221 select HAVE_RCU_TABLE_FREE if SMP
222 select HAVE_REGS_AND_STACK_ACCESS_API
223 select HAVE_SYSCALL_TRACEPOINTS
224 select HAVE_VIRT_CPU_ACCOUNTING
225 select HAVE_IRQ_TIME_ACCOUNTING
226 select IRQ_DOMAIN
227 select IRQ_FORCED_THREADING
228 select MODULES_USE_ELF_RELA
229 select NO_BOOTMEM
230 select OF
231 select OF_EARLY_FLATTREE
232 select OF_RESERVED_MEM
233 select OLD_SIGACTION if PPC32
234 select OLD_SIGSUSPEND
235 select SPARSE_IRQ
236 select SYSCTL_EXCEPTION_TRACE
237 select VIRT_TO_BUS if !PPC64
238 #
239 # Please keep this list sorted alphabetically.
240 #
242 config GENERIC_CSUM
243 def_bool n
245 config EARLY_PRINTK
246 bool
247 default y
249 config PANIC_TIMEOUT
250 int
251 default 180
253 config COMPAT
254 bool
255 default y if PPC64
256 select COMPAT_BINFMT_ELF
257 select ARCH_WANT_OLD_COMPAT_IPC
258 select COMPAT_OLD_SIGACTION
260 config SYSVIPC_COMPAT
261 bool
262 depends on COMPAT && SYSVIPC
263 default y
265 # All PPC32s use generic nvram driver through ppc_md
266 config GENERIC_NVRAM
267 bool
268 default y if PPC32
270 config SCHED_OMIT_FRAME_POINTER
271 bool
272 default y
274 config ARCH_MAY_HAVE_PC_FDC
275 bool
276 default PCI
278 config PPC_UDBG_16550
279 bool
280 default n
282 config GENERIC_TBSYNC
283 bool
284 default y if PPC32 && SMP
285 default n
287 config AUDIT_ARCH
288 bool
289 default y
291 config GENERIC_BUG
292 bool
293 default y
294 depends on BUG
296 config SYS_SUPPORTS_APM_EMULATION
297 default y if PMAC_APM_EMU
298 bool
300 config EPAPR_BOOT
301 bool
302 help
303 Used to allow a board to specify it wants an ePAPR compliant wrapper.
304 default n
306 config DEFAULT_UIMAGE
307 bool
308 help
309 Used to allow a board to specify it wants a uImage built by default
310 default n
312 config ARCH_HIBERNATION_POSSIBLE
313 bool
314 default y
316 config ARCH_SUSPEND_POSSIBLE
317 def_bool y
318 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
319 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
320 || 44x || 40x
322 config PPC_DCR_NATIVE
323 bool
324 default n
326 config PPC_DCR_MMIO
327 bool
328 default n
330 config PPC_DCR
331 bool
332 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
333 default y
335 config PPC_OF_PLATFORM_PCI
336 bool
337 depends on PCI
338 depends on PPC64 # not supported on 32 bits yet
339 default n
341 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
342 depends on PPC32 || PPC_BOOK3S_64
343 def_bool y
345 config ARCH_SUPPORTS_UPROBES
346 def_bool y
348 config PPC_ADV_DEBUG_REGS
349 bool
350 depends on 40x || BOOKE
351 default y
353 config PPC_ADV_DEBUG_IACS
354 int
355 depends on PPC_ADV_DEBUG_REGS
356 default 4 if 44x
357 default 2
359 config PPC_ADV_DEBUG_DACS
360 int
361 depends on PPC_ADV_DEBUG_REGS
362 default 2
364 config PPC_ADV_DEBUG_DVCS
365 int
366 depends on PPC_ADV_DEBUG_REGS
367 default 2 if 44x
368 default 0
370 config PPC_ADV_DEBUG_DAC_RANGE
371 bool
372 depends on PPC_ADV_DEBUG_REGS && 44x
373 default y
375 config ZONE_DMA32
376 bool
377 default y if PPC64
379 config PGTABLE_LEVELS
380 int
381 default 2 if !PPC64
382 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
383 default 4
385 source "init/Kconfig"
387 source "kernel/Kconfig.freezer"
389 source "arch/powerpc/sysdev/Kconfig"
390 source "arch/powerpc/platforms/Kconfig"
392 menu "Kernel options"
394 config HIGHMEM
395 bool "High memory support"
396 depends on PPC32
398 source kernel/Kconfig.hz
399 source kernel/Kconfig.preempt
400 source "fs/Kconfig.binfmt"
402 config HUGETLB_PAGE_SIZE_VARIABLE
403 bool
404 depends on HUGETLB_PAGE
405 default y
407 config MATH_EMULATION
408 bool "Math emulation"
409 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
410 ---help---
411 Some PowerPC chips designed for embedded applications do not have
412 a floating-point unit and therefore do not implement the
413 floating-point instructions in the PowerPC instruction set. If you
414 say Y here, the kernel will include code to emulate a floating-point
415 unit, which will allow programs that use floating-point
416 instructions to run.
418 This is also useful to emulate missing (optional) instructions
419 such as fsqrt on cores that do have an FPU but do not implement
420 them (such as Freescale BookE).
422 choice
423 prompt "Math emulation options"
424 default MATH_EMULATION_FULL
425 depends on MATH_EMULATION
427 config MATH_EMULATION_FULL
428 bool "Emulate all the floating point instructions"
429 ---help---
430 Select this option will enable the kernel to support to emulate
431 all the floating point instructions. If your SoC doesn't have
432 a FPU, you should select this.
434 config MATH_EMULATION_HW_UNIMPLEMENTED
435 bool "Just emulate the FPU unimplemented instructions"
436 ---help---
437 Select this if you know there does have a hardware FPU on your
438 SoC, but some floating point instructions are not implemented by that.
440 endchoice
442 config PPC_TRANSACTIONAL_MEM
443 bool "Transactional Memory support for POWERPC"
444 depends on PPC_BOOK3S_64
445 depends on SMP
446 select ALTIVEC
447 select VSX
448 default n
449 ---help---
450 Support user-mode Transactional Memory on POWERPC.
452 config LD_HEAD_STUB_CATCH
453 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
454 depends on PPC64
455 default n
456 help
457 Very large kernels can cause linker branch stubs to be generated by
458 code in head_64.S, which moves the head text sections out of their
459 specified location. This option can work around the problem.
461 If unsure, say "N".
463 config DISABLE_MPROFILE_KERNEL
464 bool "Disable use of mprofile-kernel for kernel tracing"
465 depends on PPC64 && CPU_LITTLE_ENDIAN
466 default y
467 help
468 Selecting this options disables use of the mprofile-kernel ABI for
469 kernel tracing. That will cause options such as live patching
470 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
471 be disabled also.
473 If you have a toolchain which supports mprofile-kernel, then you can
474 disable this. Otherwise leave it enabled. If you're not sure, say
475 "Y".
477 config MPROFILE_KERNEL
478 depends on PPC64 && CPU_LITTLE_ENDIAN
479 def_bool !DISABLE_MPROFILE_KERNEL
481 config IOMMU_HELPER
482 def_bool PPC64
484 config SWIOTLB
485 bool "SWIOTLB support"
486 default n
487 select IOMMU_HELPER
488 ---help---
489 Support for IO bounce buffering for systems without an IOMMU.
490 This allows us to DMA to the full physical address space on
491 platforms where the size of a physical address is larger
492 than the bus address. Not all platforms support this.
494 config HOTPLUG_CPU
495 bool "Support for enabling/disabling CPUs"
496 depends on SMP && (PPC_PSERIES || \
497 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
498 ---help---
499 Say Y here to be able to disable and re-enable individual
500 CPUs at runtime on SMP machines.
502 Say N if you are unsure.
504 config ARCH_CPU_PROBE_RELEASE
505 def_bool y
506 depends on HOTPLUG_CPU
508 config ARCH_ENABLE_MEMORY_HOTPLUG
509 def_bool y
511 config ARCH_HAS_WALK_MEMORY
512 def_bool y
514 config ARCH_ENABLE_MEMORY_HOTREMOVE
515 def_bool y
517 config PPC64_SUPPORTS_MEMORY_FAILURE
518 bool "Add support for memory hwpoison"
519 depends on PPC_BOOK3S_64
520 default "y" if PPC_POWERNV
521 select ARCH_SUPPORTS_MEMORY_FAILURE
523 config KEXEC
524 bool "kexec system call"
525 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
526 select KEXEC_CORE
527 help
528 kexec is a system call that implements the ability to shutdown your
529 current kernel, and to start another kernel. It is like a reboot
530 but it is independent of the system firmware. And like a reboot
531 you can start any kernel with it, not just Linux.
533 The name comes from the similarity to the exec system call.
535 It is an ongoing process to be certain the hardware in a machine
536 is properly shutdown, so do not be surprised if this code does not
537 initially work for you. As of this writing the exact hardware
538 interface is strongly in flux, so no good recommendation can be
539 made.
541 config KEXEC_FILE
542 bool "kexec file based system call"
543 select KEXEC_CORE
544 select HAVE_IMA_KEXEC
545 select BUILD_BIN2C
546 depends on PPC64
547 depends on CRYPTO=y
548 depends on CRYPTO_SHA256=y
549 help
550 This is a new version of the kexec system call. This call is
551 file based and takes in file descriptors as system call arguments
552 for kernel and initramfs as opposed to a list of segments as is the
553 case for the older kexec call.
555 config RELOCATABLE
556 bool "Build a relocatable kernel"
557 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
558 select NONSTATIC_KERNEL
559 select MODULE_REL_CRCS if MODVERSIONS
560 help
561 This builds a kernel image that is capable of running at the
562 location the kernel is loaded at. For ppc32, there is no any
563 alignment restrictions, and this feature is a superset of
564 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
565 16k-aligned base address. The kernel is linked as a
566 position-independent executable (PIE) and contains dynamic relocations
567 which are processed early in the bootup process.
569 One use is for the kexec on panic case where the recovery kernel
570 must live at a different physical address than the primary
571 kernel.
573 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
574 it has been loaded at and the compile time physical addresses
575 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
576 setting can still be useful to bootwrappers that need to know the
577 load address of the kernel (eg. u-boot/mkimage).
579 config RELOCATABLE_TEST
580 bool "Test relocatable kernel"
581 depends on (PPC64 && RELOCATABLE)
582 default n
583 help
584 This runs the relocatable kernel at the address it was initially
585 loaded at, which tends to be non-zero and therefore test the
586 relocation code.
588 config CRASH_DUMP
589 bool "Build a dump capture kernel"
590 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
591 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
592 help
593 Build a kernel suitable for use as a dump capture kernel.
594 The same kernel binary can be used as production kernel and dump
595 capture kernel.
597 config FA_DUMP
598 bool "Firmware-assisted dump"
599 depends on PPC64 && PPC_RTAS
600 select CRASH_CORE
601 select CRASH_DUMP
602 help
603 A robust mechanism to get reliable kernel crash dump with
604 assistance from firmware. This approach does not use kexec,
605 instead firmware assists in booting the capture kernel
606 while preserving memory contents. Firmware-assisted dump
607 is meant to be a kdump replacement offering robustness and
608 speed not possible without system firmware assistance.
610 If unsure, say "N"
612 config IRQ_ALL_CPUS
613 bool "Distribute interrupts on all CPUs by default"
614 depends on SMP
615 help
616 This option gives the kernel permission to distribute IRQs across
617 multiple CPUs. Saying N here will route all IRQs to the first
618 CPU. Generally saying Y is safe, although some problems have been
619 reported with SMP Power Macintoshes with this option enabled.
621 config NUMA
622 bool "NUMA support"
623 depends on PPC64
624 default y if SMP && PPC_PSERIES
626 config NODES_SHIFT
627 int
628 default "8" if PPC64
629 default "4"
630 depends on NEED_MULTIPLE_NODES
632 config USE_PERCPU_NUMA_NODE_ID
633 def_bool y
634 depends on NUMA
636 config HAVE_MEMORYLESS_NODES
637 def_bool y
638 depends on NUMA
640 config ARCH_SELECT_MEMORY_MODEL
641 def_bool y
642 depends on PPC64
644 config ARCH_FLATMEM_ENABLE
645 def_bool y
646 depends on (PPC64 && !NUMA) || PPC32
648 config ARCH_SPARSEMEM_ENABLE
649 def_bool y
650 depends on PPC64
651 select SPARSEMEM_VMEMMAP_ENABLE
653 config ARCH_SPARSEMEM_DEFAULT
654 def_bool y
655 depends on PPC_BOOK3S_64
657 config SYS_SUPPORTS_HUGETLBFS
658 bool
660 config ILLEGAL_POINTER_VALUE
661 hex
662 # This is roughly half way between the top of user space and the bottom
663 # of kernel space, which seems about as good as we can get.
664 default 0x5deadbeef0000000 if PPC64
665 default 0
667 source "mm/Kconfig"
669 config ARCH_MEMORY_PROBE
670 def_bool y
671 depends on MEMORY_HOTPLUG
673 # Some NUMA nodes have memory ranges that span
674 # other nodes. Even though a pfn is valid and
675 # between a node's start and end pfns, it may not
676 # reside on that node. See memmap_init_zone()
677 # for details.
678 config NODES_SPAN_OTHER_NODES
679 def_bool y
680 depends on NEED_MULTIPLE_NODES
682 config STDBINUTILS
683 bool "Using standard binutils settings"
684 depends on 44x
685 default y
686 help
687 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
688 Note, that kernel will be able to run only those applications,
689 which had been compiled using binutils later than 2.17.50.0.3 with
690 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
691 the older binutils, you can patch them with a trivial patch, which
692 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
694 choice
695 prompt "Page size"
696 default PPC_4K_PAGES
697 help
698 Select the kernel logical page size. Increasing the page size
699 will reduce software overhead at each page boundary, allow
700 hardware prefetch mechanisms to be more effective, and allow
701 larger dma transfers increasing IO efficiency and reducing
702 overhead. However the utilization of memory will increase.
703 For example, each cached file will using a multiple of the
704 page size to hold its contents and the difference between the
705 end of file and the end of page is wasted.
707 Some dedicated systems, such as software raid serving with
708 accelerated calculations, have shown significant increases.
710 If you configure a 64 bit kernel for 64k pages but the
711 processor does not support them, then the kernel will simulate
712 them with 4k pages, loading them on demand, but with the
713 reduced software overhead and larger internal fragmentation.
714 For the 32 bit kernel, a large page option will not be offered
715 unless it is supported by the configured processor.
717 If unsure, choose 4K_PAGES.
719 config PPC_4K_PAGES
720 bool "4k page size"
721 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
723 config PPC_16K_PAGES
724 bool "16k page size"
725 depends on 44x || PPC_8xx
727 config PPC_64K_PAGES
728 bool "64k page size"
729 depends on !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_64)
730 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
732 config PPC_256K_PAGES
733 bool "256k page size"
734 depends on 44x && !STDBINUTILS
735 help
736 Make the page size 256k.
738 As the ELF standard only requires alignment to support page
739 sizes up to 64k, you will need to compile all of your user
740 space applications with a non-standard binutils settings
741 (see the STDBINUTILS description for details).
743 Say N unless you know what you are doing.
745 endchoice
747 config THREAD_SHIFT
748 int "Thread shift" if EXPERT
749 range 13 15
750 default "15" if PPC_256K_PAGES
751 default "14" if PPC64
752 default "13"
753 help
754 Used to define the stack size. The default is almost always what you
755 want. Only change this if you know what you are doing.
757 config FORCE_MAX_ZONEORDER
758 int "Maximum zone order"
759 range 8 9 if PPC64 && PPC_64K_PAGES
760 default "9" if PPC64 && PPC_64K_PAGES
761 range 13 13 if PPC64 && !PPC_64K_PAGES
762 default "13" if PPC64 && !PPC_64K_PAGES
763 range 9 64 if PPC32 && PPC_16K_PAGES
764 default "9" if PPC32 && PPC_16K_PAGES
765 range 7 64 if PPC32 && PPC_64K_PAGES
766 default "7" if PPC32 && PPC_64K_PAGES
767 range 5 64 if PPC32 && PPC_256K_PAGES
768 default "5" if PPC32 && PPC_256K_PAGES
769 range 11 64
770 default "11"
771 help
772 The kernel memory allocator divides physically contiguous memory
773 blocks into "zones", where each zone is a power of two number of
774 pages. This option selects the largest power of two that the kernel
775 keeps in the memory allocator. If you need to allocate very large
776 blocks of physically contiguous memory, then you may need to
777 increase this value.
779 This config option is actually maximum order plus one. For example,
780 a value of 11 means that the largest free memory block is 2^10 pages.
782 The page size is not necessarily 4KB. For example, on 64-bit
783 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
784 this in mind when choosing a value for this option.
786 config PPC_SUBPAGE_PROT
787 bool "Support setting protections for 4k subpages"
788 depends on PPC_BOOK3S_64 && PPC_64K_PAGES
789 help
790 This option adds support for a system call to allow user programs
791 to set access permissions (read/write, readonly, or no access)
792 on the 4k subpages of each 64k page.
794 config PPC_COPRO_BASE
795 bool
796 default n
798 config SCHED_SMT
799 bool "SMT (Hyperthreading) scheduler support"
800 depends on PPC64 && SMP
801 help
802 SMT scheduler support improves the CPU scheduler's decision making
803 when dealing with POWER5 cpus at a cost of slightly increased
804 overhead in some places. If unsure say N here.
806 config PPC_DENORMALISATION
807 bool "PowerPC denormalisation exception handling"
808 depends on PPC_BOOK3S_64
809 default "y" if PPC_POWERNV
810 ---help---
811 Add support for handling denormalisation of single precision
812 values. Useful for bare metal only. If unsure say Y here.
814 config CMDLINE_BOOL
815 bool "Default bootloader kernel arguments"
817 config CMDLINE
818 string "Initial kernel command string"
819 depends on CMDLINE_BOOL
820 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
821 help
822 On some platforms, there is currently no way for the boot loader to
823 pass arguments to the kernel. For these platforms, you can supply
824 some command-line options at build time by entering them here. In
825 most cases you will need to specify the root device here.
827 config CMDLINE_FORCE
828 bool "Always use the default kernel command string"
829 depends on CMDLINE_BOOL
830 help
831 Always use the default kernel command string, even if the boot
832 loader passes other arguments to the kernel.
833 This is useful if you cannot or don't want to change the
834 command-line options your boot loader passes to the kernel.
836 config EXTRA_TARGETS
837 string "Additional default image types"
838 help
839 List additional targets to be built by the bootwrapper here (separated
840 by spaces). This is useful for targets that depend of device tree
841 files in the .dts directory.
843 Targets in this list will be build as part of the default build
844 target, or when the user does a 'make zImage' or a
845 'make zImage.initrd'.
847 If unsure, leave blank
849 config ARCH_WANTS_FREEZER_CONTROL
850 def_bool y
851 depends on ADB_PMU
853 source kernel/power/Kconfig
855 config SECCOMP
856 bool "Enable seccomp to safely compute untrusted bytecode"
857 depends on PROC_FS
858 default y
859 help
860 This kernel feature is useful for number crunching applications
861 that may need to compute untrusted bytecode during their
862 execution. By using pipes or other transports made available to
863 the process as file descriptors supporting the read/write
864 syscalls, it's possible to isolate those applications in
865 their own address space using seccomp. Once seccomp is
866 enabled via /proc/<pid>/seccomp, it cannot be disabled
867 and the task is only allowed to execute a few safe syscalls
868 defined by each seccomp mode.
870 If unsure, say Y. Only embedded should say N here.
872 config PPC_MEM_KEYS
873 prompt "PowerPC Memory Protection Keys"
874 def_bool y
875 depends on PPC_BOOK3S_64
876 select ARCH_USES_HIGH_VMA_FLAGS
877 select ARCH_HAS_PKEYS
878 help
879 Memory Protection Keys provides a mechanism for enforcing
880 page-based protections, but without requiring modification of the
881 page tables when an application changes protection domains.
883 For details, see Documentation/vm/protection-keys.txt
885 If unsure, say y.
887 endmenu
889 config ISA_DMA_API
890 bool
891 default PCI
893 menu "Bus options"
895 config ISA
896 bool "Support for ISA-bus hardware"
897 depends on PPC_CHRP
898 select PPC_I8259
899 help
900 Find out whether you have ISA slots on your motherboard. ISA is the
901 name of a bus system, i.e. the way the CPU talks to the other stuff
902 inside your box. If you have an Apple machine, say N here; if you
903 have an IBM RS/6000 or pSeries machine, say Y. If you have an
904 embedded board, consult your board documentation.
906 config ZONE_DMA
907 bool
908 default y
910 config NEED_DMA_MAP_STATE
911 def_bool (PPC64 || NOT_COHERENT_CACHE)
913 config NEED_SG_DMA_LENGTH
914 def_bool y
916 config GENERIC_ISA_DMA
917 bool
918 depends on ISA_DMA_API
919 default y
921 config PPC_INDIRECT_PCI
922 bool
923 depends on PCI
924 default y if 40x || 44x
925 default n
927 config EISA
928 bool
930 config SBUS
931 bool
933 config FSL_SOC
934 bool
936 config FSL_PCI
937 bool
938 select PPC_INDIRECT_PCI
939 select PCI_QUIRKS
941 config FSL_PMC
942 bool
943 default y
944 depends on SUSPEND && (PPC_85xx || PPC_86xx)
945 help
946 Freescale MPC85xx/MPC86xx power management controller support
947 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
949 config PPC4xx_CPM
950 bool
951 default y
952 depends on SUSPEND && (44x || 40x)
953 help
954 PPC4xx Clock Power Management (CPM) support (suspend/resume).
955 It also enables support for two different idle states (idle-wait
956 and idle-doze).
958 config 4xx_SOC
959 bool
961 config FSL_LBC
962 bool "Freescale Local Bus support"
963 help
964 Enables reporting of errors from the Freescale local bus
965 controller. Also contains some common code used by
966 drivers for specific local bus peripherals.
968 config FSL_GTM
969 bool
970 depends on PPC_83xx || QUICC_ENGINE || CPM2
971 help
972 Freescale General-purpose Timers support
974 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
975 config MCA
976 bool
978 # Platforms that what PCI turned unconditionally just do select PCI
979 # in their config node. Platforms that want to choose at config
980 # time should select PPC_PCI_CHOICE
981 config PPC_PCI_CHOICE
982 bool
984 config PCI
985 bool "PCI support" if PPC_PCI_CHOICE
986 default y if !40x && !CPM2 && !PPC_8xx && !PPC_83xx \
987 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
988 default PCI_QSPAN if PPC_8xx
989 select GENERIC_PCI_IOMAP
990 help
991 Find out whether your system includes a PCI bus. PCI is the name of
992 a bus system, i.e. the way the CPU talks to the other stuff inside
993 your box. If you say Y here, the kernel will include drivers and
994 infrastructure code to support PCI bus devices.
996 config PCI_DOMAINS
997 def_bool PCI
999 config PCI_SYSCALL
1000 def_bool PCI
1002 config PCI_QSPAN
1003 bool "QSpan PCI"
1004 depends on PPC_8xx
1005 select PPC_I8259
1006 help
1007 Say Y here if you have a system based on a Motorola 8xx-series
1008 embedded processor with a QSPAN PCI interface, otherwise say N.
1010 config PCI_8260
1011 bool
1012 depends on PCI && 8260
1013 select PPC_INDIRECT_PCI
1014 default y
1016 source "drivers/pci/Kconfig"
1018 source "drivers/pcmcia/Kconfig"
1020 config HAS_RAPIDIO
1021 bool
1022 default n
1024 config RAPIDIO
1025 tristate "RapidIO support"
1026 depends on HAS_RAPIDIO || PCI
1027 help
1028 If you say Y here, the kernel will include drivers and
1029 infrastructure code to support RapidIO interconnect devices.
1031 config FSL_RIO
1032 bool "Freescale Embedded SRIO Controller support"
1033 depends on RAPIDIO = y && HAS_RAPIDIO
1034 default "n"
1035 ---help---
1036 Include support for RapidIO controller on Freescale embedded
1037 processors (MPC8548, MPC8641, etc).
1039 source "drivers/rapidio/Kconfig"
1041 endmenu
1043 config NONSTATIC_KERNEL
1044 bool
1045 default n
1047 menu "Advanced setup"
1048 depends on PPC32
1050 config ADVANCED_OPTIONS
1051 bool "Prompt for advanced kernel configuration options"
1052 help
1053 This option will enable prompting for a variety of advanced kernel
1054 configuration options. These options can cause the kernel to not
1055 work if they are set incorrectly, but can be used to optimize certain
1056 aspects of kernel memory management.
1058 Unless you know what you are doing, say N here.
1060 comment "Default settings for advanced configuration options are used"
1061 depends on !ADVANCED_OPTIONS
1063 config LOWMEM_SIZE_BOOL
1064 bool "Set maximum low memory"
1065 depends on ADVANCED_OPTIONS
1066 help
1067 This option allows you to set the maximum amount of memory which
1068 will be used as "low memory", that is, memory which the kernel can
1069 access directly, without having to set up a kernel virtual mapping.
1070 This can be useful in optimizing the layout of kernel virtual
1071 memory.
1073 Say N here unless you know what you are doing.
1075 config LOWMEM_SIZE
1076 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1077 default "0x30000000"
1079 config LOWMEM_CAM_NUM_BOOL
1080 bool "Set number of CAMs to use to map low memory"
1081 depends on ADVANCED_OPTIONS && FSL_BOOKE
1082 help
1083 This option allows you to set the maximum number of CAM slots that
1084 will be used to map low memory. There are a limited number of slots
1085 available and even more limited number that will fit in the L1 MMU.
1086 However, using more entries will allow mapping more low memory. This
1087 can be useful in optimizing the layout of kernel virtual memory.
1089 Say N here unless you know what you are doing.
1091 config LOWMEM_CAM_NUM
1092 depends on FSL_BOOKE
1093 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1094 default 3
1096 config DYNAMIC_MEMSTART
1097 bool "Enable page aligned dynamic load address for kernel"
1098 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1099 select NONSTATIC_KERNEL
1100 help
1101 This option enables the kernel to be loaded at any page aligned
1102 physical address. The kernel creates a mapping from KERNELBASE to
1103 the address where the kernel is loaded. The page size here implies
1104 the TLB page size of the mapping for kernel on the particular platform.
1105 Please refer to the init code for finding the TLB page size.
1107 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1108 kernel image, where the only restriction is the page aligned kernel
1109 load address. When this option is enabled, the compile time physical
1110 address CONFIG_PHYSICAL_START is ignored.
1112 This option is overridden by CONFIG_RELOCATABLE
1114 config PAGE_OFFSET_BOOL
1115 bool "Set custom page offset address"
1116 depends on ADVANCED_OPTIONS
1117 help
1118 This option allows you to set the kernel virtual address at which
1119 the kernel will map low memory. This can be useful in optimizing
1120 the virtual memory layout of the system.
1122 Say N here unless you know what you are doing.
1124 config PAGE_OFFSET
1125 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1126 default "0xc0000000"
1128 config KERNEL_START_BOOL
1129 bool "Set custom kernel base address"
1130 depends on ADVANCED_OPTIONS
1131 help
1132 This option allows you to set the kernel virtual address at which
1133 the kernel will be loaded. Normally this should match PAGE_OFFSET
1134 however there are times (like kdump) that one might not want them
1135 to be the same.
1137 Say N here unless you know what you are doing.
1139 config KERNEL_START
1140 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1141 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1142 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1143 default "0xc0000000"
1145 config PHYSICAL_START_BOOL
1146 bool "Set physical address where the kernel is loaded"
1147 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1148 help
1149 This gives the physical address where the kernel is loaded.
1151 Say N here unless you know what you are doing.
1153 config PHYSICAL_START
1154 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1155 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1156 default "0x00000000"
1158 config PHYSICAL_ALIGN
1159 hex
1160 default "0x04000000" if FSL_BOOKE
1161 help
1162 This value puts the alignment restrictions on physical address
1163 where kernel is loaded and run from. Kernel is compiled for an
1164 address which meets above alignment restriction.
1166 config TASK_SIZE_BOOL
1167 bool "Set custom user task size"
1168 depends on ADVANCED_OPTIONS
1169 help
1170 This option allows you to set the amount of virtual address space
1171 allocated to user tasks. This can be useful in optimizing the
1172 virtual memory layout of the system.
1174 Say N here unless you know what you are doing.
1176 config TASK_SIZE
1177 hex "Size of user task space" if TASK_SIZE_BOOL
1178 default "0x80000000" if PPC_8xx
1179 default "0xc0000000"
1181 config CONSISTENT_SIZE_BOOL
1182 bool "Set custom consistent memory pool size"
1183 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1184 help
1185 This option allows you to set the size of the
1186 consistent memory pool. This pool of virtual memory
1187 is used to make consistent memory allocations.
1189 config CONSISTENT_SIZE
1190 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1191 default "0x00200000" if NOT_COHERENT_CACHE
1193 config PIN_TLB
1194 bool "Pinned Kernel TLBs (860 ONLY)"
1195 depends on ADVANCED_OPTIONS && PPC_8xx && \
1196 !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
1198 config PIN_TLB_DATA
1199 bool "Pinned TLB for DATA"
1200 depends on PIN_TLB
1201 default y
1203 config PIN_TLB_IMMR
1204 bool "Pinned TLB for IMMR"
1205 depends on PIN_TLB
1206 default y
1208 config PIN_TLB_TEXT
1209 bool "Pinned TLB for TEXT"
1210 depends on PIN_TLB
1211 default y
1212 endmenu
1214 if PPC64
1215 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1216 config PAGE_OFFSET
1217 hex
1218 default "0xc000000000000000"
1219 config KERNEL_START
1220 hex
1221 default "0xc000000000000000"
1222 config PHYSICAL_START
1223 hex
1224 default "0x00000000"
1225 endif
1227 config ARCH_RANDOM
1228 def_bool n
1230 source "net/Kconfig"
1232 source "drivers/Kconfig"
1234 source "fs/Kconfig"
1236 source "lib/Kconfig"
1238 source "arch/powerpc/Kconfig.debug"
1240 source "security/Kconfig"
1242 source "crypto/Kconfig"
1244 config PPC_LIB_RHEAP
1245 bool
1247 source "arch/powerpc/kvm/Kconfig"
1249 source "kernel/livepatch/Kconfig"