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Linux kernel mirror (for testing)
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linux
1# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3#
4
5mainmenu "Linux/PowerPC Kernel Configuration"
6
7source "arch/powerpc/platforms/Kconfig.cputype"
8
9config PPC32
10 bool
11 default y if !PPC64
12
13config 64BIT
14 bool
15 default y if PPC64
16
17config WORD_SIZE
18 int
19 default 64 if PPC64
20 default 32 if !PPC64
21
22config PPC_MERGE
23 def_bool y
24
25config MMU
26 bool
27 default y
28
29config GENERIC_CMOS_UPDATE
30 def_bool y
31
32config GENERIC_TIME
33 def_bool y
34
35config GENERIC_TIME_VSYSCALL
36 def_bool y
37
38config GENERIC_CLOCKEVENTS
39 def_bool y
40
41config GENERIC_HARDIRQS
42 bool
43 default y
44
45config HAVE_SETUP_PER_CPU_AREA
46 def_bool PPC64
47
48config IRQ_PER_CPU
49 bool
50 default y
51
52config RWSEM_GENERIC_SPINLOCK
53 bool
54
55config RWSEM_XCHGADD_ALGORITHM
56 bool
57 default y
58
59config GENERIC_LOCKBREAK
60 bool
61 default y
62 depends on SMP && PREEMPT
63
64config ARCH_HAS_ILOG2_U32
65 bool
66 default y
67
68config ARCH_HAS_ILOG2_U64
69 bool
70 default y if 64BIT
71
72config GENERIC_HWEIGHT
73 bool
74 default y
75
76config GENERIC_CALIBRATE_DELAY
77 bool
78 default y
79
80config GENERIC_FIND_NEXT_BIT
81 bool
82 default y
83
84config ARCH_NO_VIRT_TO_BUS
85 def_bool PPC64
86
87config PPC
88 bool
89 default y
90
91config EARLY_PRINTK
92 bool
93 default y
94
95config COMPAT
96 bool
97 default y if PPC64
98
99config SYSVIPC_COMPAT
100 bool
101 depends on COMPAT && SYSVIPC
102 default y
103
104# All PPC32s use generic nvram driver through ppc_md
105config GENERIC_NVRAM
106 bool
107 default y if PPC32
108
109config SCHED_NO_NO_OMIT_FRAME_POINTER
110 bool
111 default y
112
113config ARCH_MAY_HAVE_PC_FDC
114 bool
115 default !PPC_PSERIES || PCI
116
117config PPC_OF
118 def_bool y
119
120config OF
121 def_bool y
122
123config PPC_UDBG_16550
124 bool
125 default n
126
127config GENERIC_TBSYNC
128 bool
129 default y if PPC32 && SMP
130 default n
131
132config AUDIT_ARCH
133 bool
134 default y
135
136config GENERIC_BUG
137 bool
138 default y
139 depends on BUG
140
141config SYS_SUPPORTS_APM_EMULATION
142 default y if PMAC_APM_EMU
143 bool
144
145config DEFAULT_UIMAGE
146 bool
147 help
148 Used to allow a board to specify it wants a uImage built by default
149 default n
150
151config REDBOOT
152 bool
153
154config HIBERNATE_32
155 bool
156 depends on (PPC_PMAC && !SMP) || BROKEN
157 default y
158
159config HIBERNATE_64
160 bool
161 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
162 default y
163
164config ARCH_HIBERNATION_POSSIBLE
165 bool
166 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
167 default y
168
169config ARCH_SUSPEND_POSSIBLE
170 def_bool y
171 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
172
173config PPC_DCR_NATIVE
174 bool
175 default n
176
177config PPC_DCR_MMIO
178 bool
179 default n
180
181config PPC_DCR
182 bool
183 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
184 default y
185
186config PPC_OF_PLATFORM_PCI
187 bool
188 depends on PCI
189 depends on PPC64 # not supported on 32 bits yet
190 default n
191
192source "init/Kconfig"
193
194source "arch/powerpc/sysdev/Kconfig"
195source "arch/powerpc/platforms/Kconfig"
196
197menu "Kernel options"
198
199config HIGHMEM
200 bool "High memory support"
201 depends on PPC32
202
203source kernel/time/Kconfig
204source kernel/Kconfig.hz
205source kernel/Kconfig.preempt
206source "fs/Kconfig.binfmt"
207
208# We optimistically allocate largepages from the VM, so make the limit
209# large enough (16MB). This badly named config option is actually
210# max order + 1
211config FORCE_MAX_ZONEORDER
212 int
213 depends on PPC64
214 default "9" if PPC_64K_PAGES
215 default "13"
216
217config HUGETLB_PAGE_SIZE_VARIABLE
218 bool
219 depends on HUGETLB_PAGE
220 default y
221
222config MATH_EMULATION
223 bool "Math emulation"
224 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
225 ---help---
226 Some PowerPC chips designed for embedded applications do not have
227 a floating-point unit and therefore do not implement the
228 floating-point instructions in the PowerPC instruction set. If you
229 say Y here, the kernel will include code to emulate a floating-point
230 unit, which will allow programs that use floating-point
231 instructions to run.
232
233config 8XX_MINIMAL_FPEMU
234 bool "Minimal math emulation for 8xx"
235 depends on 8xx && !MATH_EMULATION
236 help
237 Older arch/ppc kernels still emulated a few floating point
238 instructions such as load and store, even when full math
239 emulation is disabled. Say "Y" here if you want to preserve
240 this behavior.
241
242 It is recommended that you build a soft-float userspace instead.
243
244config IOMMU_VMERGE
245 bool "Enable IOMMU virtual merging"
246 depends on PPC64
247 default y
248 help
249 Cause IO segments sent to a device for DMA to be merged virtually
250 by the IOMMU when they happen to have been allocated contiguously.
251 This doesn't add pressure to the IOMMU allocator. However, some
252 drivers don't support getting large merged segments coming back
253 from *_map_sg().
254
255 Most drivers don't have this problem; it is safe to say Y here.
256
257config HOTPLUG_CPU
258 bool "Support for enabling/disabling CPUs"
259 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
260 ---help---
261 Say Y here to be able to disable and re-enable individual
262 CPUs at runtime on SMP machines.
263
264 Say N if you are unsure.
265
266config ARCH_ENABLE_MEMORY_HOTPLUG
267 def_bool y
268
269config KEXEC
270 bool "kexec system call (EXPERIMENTAL)"
271 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
272 help
273 kexec is a system call that implements the ability to shutdown your
274 current kernel, and to start another kernel. It is like a reboot
275 but it is independent of the system firmware. And like a reboot
276 you can start any kernel with it, not just Linux.
277
278 The name comes from the similarity to the exec system call.
279
280 It is an ongoing process to be certain the hardware in a machine
281 is properly shutdown, so do not be surprised if this code does not
282 initially work for you. It may help to enable device hotplugging
283 support. As of this writing the exact hardware interface is
284 strongly in flux, so no good recommendation can be made.
285
286config CRASH_DUMP
287 bool "Build a kdump crash kernel (EXPERIMENTAL)"
288 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
289 help
290 Build a kernel suitable for use as a kdump capture kernel.
291 The kernel will be linked at a different address than normal, and
292 so can only be used for Kdump.
293
294 Don't change this unless you know what you are doing.
295
296config PPCBUG_NVRAM
297 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
298 default y if PPC_PREP
299
300config IRQ_ALL_CPUS
301 bool "Distribute interrupts on all CPUs by default"
302 depends on SMP && !MV64360
303 help
304 This option gives the kernel permission to distribute IRQs across
305 multiple CPUs. Saying N here will route all IRQs to the first
306 CPU. Generally saying Y is safe, although some problems have been
307 reported with SMP Power Macintoshes with this option enabled.
308
309config NUMA
310 bool "NUMA support"
311 depends on PPC64
312 default y if SMP && PPC_PSERIES
313
314config NODES_SHIFT
315 int
316 default "4"
317 depends on NEED_MULTIPLE_NODES
318
319config ARCH_SELECT_MEMORY_MODEL
320 def_bool y
321 depends on PPC64
322
323config ARCH_FLATMEM_ENABLE
324 def_bool y
325 depends on (PPC64 && !NUMA) || PPC32
326
327config ARCH_SPARSEMEM_ENABLE
328 def_bool y
329 depends on PPC64
330 select SPARSEMEM_VMEMMAP_ENABLE
331
332config ARCH_SPARSEMEM_DEFAULT
333 def_bool y
334 depends on (SMP && PPC_PSERIES) || PPC_PS3
335
336config ARCH_POPULATES_NODE_MAP
337 def_bool y
338
339source "mm/Kconfig"
340
341config ARCH_MEMORY_PROBE
342 def_bool y
343 depends on MEMORY_HOTPLUG
344
345# Some NUMA nodes have memory ranges that span
346# other nodes. Even though a pfn is valid and
347# between a node's start and end pfns, it may not
348# reside on that node. See memmap_init_zone()
349# for details.
350config NODES_SPAN_OTHER_NODES
351 def_bool y
352 depends on NEED_MULTIPLE_NODES
353
354config PPC_HAS_HASH_64K
355 bool
356 depends on PPC64
357 default n
358
359config PPC_64K_PAGES
360 bool "64k page size"
361 depends on PPC64
362 select PPC_HAS_HASH_64K
363 help
364 This option changes the kernel logical page size to 64k. On machines
365 without processor support for 64k pages, the kernel will simulate
366 them by loading each individual 4k page on demand transparently,
367 while on hardware with such support, it will be used to map
368 normal application pages.
369
370config PPC_SUBPAGE_PROT
371 bool "Support setting protections for 4k subpages"
372 depends on PPC_64K_PAGES
373 help
374 This option adds support for a system call to allow user programs
375 to set access permissions (read/write, readonly, or no access)
376 on the 4k subpages of each 64k page.
377
378config SCHED_SMT
379 bool "SMT (Hyperthreading) scheduler support"
380 depends on PPC64 && SMP
381 help
382 SMT scheduler support improves the CPU scheduler's decision making
383 when dealing with POWER5 cpus at a cost of slightly increased
384 overhead in some places. If unsure say N here.
385
386config PROC_DEVICETREE
387 bool "Support for device tree in /proc"
388 depends on PROC_FS
389 help
390 This option adds a device-tree directory under /proc which contains
391 an image of the device tree that the kernel copies from Open
392 Firmware or other boot firmware. If unsure, say Y here.
393
394config CMDLINE_BOOL
395 bool "Default bootloader kernel arguments"
396
397config CMDLINE
398 string "Initial kernel command string"
399 depends on CMDLINE_BOOL
400 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
401 help
402 On some platforms, there is currently no way for the boot loader to
403 pass arguments to the kernel. For these platforms, you can supply
404 some command-line options at build time by entering them here. In
405 most cases you will need to specify the root device here.
406
407if !44x || BROKEN
408config ARCH_WANTS_FREEZER_CONTROL
409 def_bool y
410 depends on ADB_PMU
411
412source kernel/power/Kconfig
413endif
414
415config SECCOMP
416 bool "Enable seccomp to safely compute untrusted bytecode"
417 depends on PROC_FS
418 default y
419 help
420 This kernel feature is useful for number crunching applications
421 that may need to compute untrusted bytecode during their
422 execution. By using pipes or other transports made available to
423 the process as file descriptors supporting the read/write
424 syscalls, it's possible to isolate those applications in
425 their own address space using seccomp. Once seccomp is
426 enabled via /proc/<pid>/seccomp, it cannot be disabled
427 and the task is only allowed to execute a few safe syscalls
428 defined by each seccomp mode.
429
430 If unsure, say Y. Only embedded should say N here.
431
432config WANT_DEVICE_TREE
433 bool
434 default n
435
436config DEVICE_TREE
437 string "Static device tree source file"
438 depends on WANT_DEVICE_TREE
439 help
440 This specifies the device tree source (.dts) file to be
441 compiled and included when building the bootwrapper. If a
442 relative filename is given, then it will be relative to
443 arch/powerpc/boot/dts. If you are not using the bootwrapper,
444 or do not need to build a dts into the bootwrapper, this
445 field is ignored.
446
447 For example, this is required when building a cuImage target
448 for an older U-Boot, which cannot pass a device tree itself.
449 Such a kernel will not work with a newer U-Boot that tries to
450 pass a device tree (unless you tell it not to). If your U-Boot
451 does not mention a device tree in "help bootm", then use the
452 cuImage target and specify a device tree here. Otherwise, use
453 the uImage target and leave this field blank.
454
455endmenu
456
457config ISA_DMA_API
458 bool
459 default !PPC_ISERIES || PCI
460
461menu "Bus options"
462
463config ISA
464 bool "Support for ISA-bus hardware"
465 depends on PPC_PREP || PPC_CHRP
466 select PPC_I8259
467 help
468 Find out whether you have ISA slots on your motherboard. ISA is the
469 name of a bus system, i.e. the way the CPU talks to the other stuff
470 inside your box. If you have an Apple machine, say N here; if you
471 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
472 you have an embedded board, consult your board documentation.
473
474config ZONE_DMA
475 bool
476 default y
477
478config GENERIC_ISA_DMA
479 bool
480 depends on PPC64 || POWER4 || 6xx && !CPM2
481 default y
482
483config PPC_INDIRECT_PCI
484 bool
485 depends on PCI
486 default y if 40x || 44x
487 default n
488
489config EISA
490 bool
491
492config SBUS
493 bool
494
495config FSL_SOC
496 bool
497
498config FSL_PCI
499 bool
500 select PPC_INDIRECT_PCI
501
502# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
503config MCA
504 bool
505
506config PCI
507 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
508 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
509 || PPC_PS3 || 44x
510 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
511 && !PPC_85xx && !PPC_86xx
512 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
513 default PCI_QSPAN if !4xx && !CPM2 && 8xx
514 select ARCH_SUPPORTS_MSI
515 help
516 Find out whether your system includes a PCI bus. PCI is the name of
517 a bus system, i.e. the way the CPU talks to the other stuff inside
518 your box. If you say Y here, the kernel will include drivers and
519 infrastructure code to support PCI bus devices.
520
521config PCI_DOMAINS
522 def_bool PCI
523
524config PCI_SYSCALL
525 def_bool PCI
526
527config PCI_QSPAN
528 bool "QSpan PCI"
529 depends on !4xx && !CPM2 && 8xx
530 select PPC_I8259
531 help
532 Say Y here if you have a system based on a Motorola 8xx-series
533 embedded processor with a QSPAN PCI interface, otherwise say N.
534
535config PCI_8260
536 bool
537 depends on PCI && 8260
538 select PPC_INDIRECT_PCI
539 default y
540
541config 8260_PCI9
542 bool "Enable workaround for MPC826x erratum PCI 9"
543 depends on PCI_8260 && !8272
544 default y
545
546choice
547 prompt "IDMA channel for PCI 9 workaround"
548 depends on 8260_PCI9
549
550config 8260_PCI9_IDMA1
551 bool "IDMA1"
552
553config 8260_PCI9_IDMA2
554 bool "IDMA2"
555
556config 8260_PCI9_IDMA3
557 bool "IDMA3"
558
559config 8260_PCI9_IDMA4
560 bool "IDMA4"
561
562endchoice
563
564source "drivers/pci/pcie/Kconfig"
565
566source "drivers/pci/Kconfig"
567
568source "drivers/pcmcia/Kconfig"
569
570source "drivers/pci/hotplug/Kconfig"
571
572endmenu
573
574menu "Advanced setup"
575 depends on PPC32
576
577config ADVANCED_OPTIONS
578 bool "Prompt for advanced kernel configuration options"
579 help
580 This option will enable prompting for a variety of advanced kernel
581 configuration options. These options can cause the kernel to not
582 work if they are set incorrectly, but can be used to optimize certain
583 aspects of kernel memory management.
584
585 Unless you know what you are doing, say N here.
586
587comment "Default settings for advanced configuration options are used"
588 depends on !ADVANCED_OPTIONS
589
590config HIGHMEM_START_BOOL
591 bool "Set high memory pool address"
592 depends on ADVANCED_OPTIONS && HIGHMEM
593 help
594 This option allows you to set the base address of the kernel virtual
595 area used to map high memory pages. This can be useful in
596 optimizing the layout of kernel virtual memory.
597
598 Say N here unless you know what you are doing.
599
600config HIGHMEM_START
601 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
602 default "0xfe000000"
603
604config LOWMEM_SIZE_BOOL
605 bool "Set maximum low memory"
606 depends on ADVANCED_OPTIONS
607 help
608 This option allows you to set the maximum amount of memory which
609 will be used as "low memory", that is, memory which the kernel can
610 access directly, without having to set up a kernel virtual mapping.
611 This can be useful in optimizing the layout of kernel virtual
612 memory.
613
614 Say N here unless you know what you are doing.
615
616config LOWMEM_SIZE
617 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
618 default "0x30000000"
619
620config KERNEL_START_BOOL
621 bool "Set custom kernel base address"
622 depends on ADVANCED_OPTIONS
623 help
624 This option allows you to set the kernel virtual address at which
625 the kernel will map low memory (the kernel image will be linked at
626 this address). This can be useful in optimizing the virtual memory
627 layout of the system.
628
629 Say N here unless you know what you are doing.
630
631config KERNEL_START
632 hex "Virtual address of kernel base" if KERNEL_START_BOOL
633 default "0xc0000000"
634
635config TASK_SIZE_BOOL
636 bool "Set custom user task size"
637 depends on ADVANCED_OPTIONS
638 help
639 This option allows you to set the amount of virtual address space
640 allocated to user tasks. This can be useful in optimizing the
641 virtual memory layout of the system.
642
643 Say N here unless you know what you are doing.
644
645config TASK_SIZE
646 hex "Size of user task space" if TASK_SIZE_BOOL
647 default "0x80000000" if PPC_PREP || PPC_8xx
648 default "0xc0000000"
649
650config CONSISTENT_START_BOOL
651 bool "Set custom consistent memory pool address"
652 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
653 help
654 This option allows you to set the base virtual address
655 of the consistent memory pool. This pool of virtual
656 memory is used to make consistent memory allocations.
657
658config CONSISTENT_START
659 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
660 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
661 default "0xff100000" if NOT_COHERENT_CACHE
662
663config CONSISTENT_SIZE_BOOL
664 bool "Set custom consistent memory pool size"
665 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
666 help
667 This option allows you to set the size of the
668 consistent memory pool. This pool of virtual memory
669 is used to make consistent memory allocations.
670
671config CONSISTENT_SIZE
672 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
673 default "0x00200000" if NOT_COHERENT_CACHE
674
675config BOOT_LOAD_BOOL
676 bool "Set the boot link/load address"
677 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
678 help
679 This option allows you to set the initial load address of the zImage
680 or zImage.initrd file. This can be useful if you are on a board
681 which has a small amount of memory.
682
683 Say N here unless you know what you are doing.
684
685config BOOT_LOAD
686 hex "Link/load address for booting" if BOOT_LOAD_BOOL
687 default "0x00400000" if 40x || 8xx || 8260
688 default "0x01000000" if 44x
689 default "0x00800000"
690
691config PIN_TLB
692 bool "Pinned Kernel TLBs (860 ONLY)"
693 depends on ADVANCED_OPTIONS && 8xx
694endmenu
695
696if PPC64
697config KERNEL_START
698 hex
699 default "0xc000000000000000"
700endif
701
702source "net/Kconfig"
703
704source "drivers/Kconfig"
705
706source "fs/Kconfig"
707
708# XXX source "arch/ppc/8xx_io/Kconfig"
709
710# XXX source "arch/ppc/8260_io/Kconfig"
711
712source "arch/powerpc/sysdev/qe_lib/Kconfig"
713
714source "lib/Kconfig"
715
716source "kernel/Kconfig.instrumentation"
717
718source "arch/powerpc/Kconfig.debug"
719
720source "security/Kconfig"
721
722config KEYS_COMPAT
723 bool
724 depends on COMPAT && KEYS
725 default y
726
727source "crypto/Kconfig"
728
729config PPC_CLOCK
730 bool
731 default n
732
733config PPC_LIB_RHEAP
734 bool
735