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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
a0ae9c7c 7source "arch/powerpc/platforms/Kconfig.cputype"
17e638bc 8
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9config PPC32
10 bool
11 default y if !PPC64
12
13config 64BIT
14 bool
15 default y if PPC64
16
17config PPC_MERGE
18 def_bool y
19
20config MMU
21 bool
22 default y
23
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24config GENERIC_HARDIRQS
25 bool
26 default y
27
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28config IRQ_PER_CPU
29 bool
30 default y
31
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32config RWSEM_GENERIC_SPINLOCK
33 bool
34
35config RWSEM_XCHGADD_ALGORITHM
36 bool
37 default y
38
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39config ARCH_HAS_ILOG2_U32
40 bool
ef55d53c 41 default y
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42
43config ARCH_HAS_ILOG2_U64
44 bool
ef55d53c 45 default y if 64BIT
f0d1b0b3 46
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47config GENERIC_HWEIGHT
48 bool
49 default y
50
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51config GENERIC_CALIBRATE_DELAY
52 bool
53 default y
54
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55config GENERIC_FIND_NEXT_BIT
56 bool
57 default y
58
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59config ARCH_NO_VIRT_TO_BUS
60 def_bool PPC64
61
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62config PPC
63 bool
64 default y
65
66config EARLY_PRINTK
67 bool
51d3082f 68 default y
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69
70config COMPAT
71 bool
72 default y if PPC64
73
74config SYSVIPC_COMPAT
75 bool
76 depends on COMPAT && SYSVIPC
77 default y
78
79# All PPC32s use generic nvram driver through ppc_md
80config GENERIC_NVRAM
81 bool
82 default y if PPC32
83
84config SCHED_NO_NO_OMIT_FRAME_POINTER
85 bool
86 default y
87
88config ARCH_MAY_HAVE_PC_FDC
89 bool
bed59275 90 default !PPC_PSERIES || PCI
14cf11af 91
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92config PPC_OF
93 def_bool y
94
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95config OF
96 def_bool y
97
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98config PPC_UDBG_16550
99 bool
100 default n
101
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102config GENERIC_TBSYNC
103 bool
104 default y if PPC32 && SMP
105 default n
106
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107config AUDIT_ARCH
108 bool
109 default y
110
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111config GENERIC_BUG
112 bool
113 default y
114 depends on BUG
115
b3028878 116config SYS_SUPPORTS_APM_EMULATION
58da10bb 117 default y if PMAC_APM_EMU
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118 bool
119
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120config DEFAULT_UIMAGE
121 bool
122 help
123 Used to allow a board to specify it wants a uImage built by default
124 default n
125
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126config PPC64_SWSUSP
127 bool
128 depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
129 default y
130
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131config PPC_DCR_NATIVE
132 bool
133 default n
134
135config PPC_DCR_MMIO
136 bool
137 default n
138
139config PPC_DCR
140 bool
141 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
142 default y
143
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144config PPC_OF_PLATFORM_PCI
145 bool
146 depends on PPC64 # not supported on 32 bits yet
147 default n
148
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149source "init/Kconfig"
150
4330f5da 151source "arch/powerpc/platforms/Kconfig"
14cf11af 152
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153menu "Kernel options"
154
155config HIGHMEM
156 bool "High memory support"
157 depends on PPC32
158
159source kernel/Kconfig.hz
160source kernel/Kconfig.preempt
161source "fs/Kconfig.binfmt"
162
163# We optimistically allocate largepages from the VM, so make the limit
164# large enough (16MB). This badly named config option is actually
165# max order + 1
166config FORCE_MAX_ZONEORDER
167 int
168 depends on PPC64
02864867 169 default "9" if PPC_64K_PAGES
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170 default "13"
171
172config MATH_EMULATION
173 bool "Math emulation"
4d52719a 174 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
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175 ---help---
176 Some PowerPC chips designed for embedded applications do not have
177 a floating-point unit and therefore do not implement the
178 floating-point instructions in the PowerPC instruction set. If you
179 say Y here, the kernel will include code to emulate a floating-point
180 unit, which will allow programs that use floating-point
181 instructions to run.
182
183config IOMMU_VMERGE
184 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
185 depends on EXPERIMENTAL && PPC64
186 default n
187 help
188 Cause IO segments sent to a device for DMA to be merged virtually
189 by the IOMMU when they happen to have been allocated contiguously.
190 This doesn't add pressure to the IOMMU allocator. However, some
191 drivers don't support getting large merged segments coming back
192 from *_map_sg(). Say Y if you know the drivers you are using are
193 properly handling this case.
194
195config HOTPLUG_CPU
196 bool "Support for enabling/disabling CPUs"
197 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
198 ---help---
199 Say Y here to be able to disable and re-enable individual
200 CPUs at runtime on SMP machines.
201
202 Say N if you are unsure.
203
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204config ARCH_ENABLE_MEMORY_HOTPLUG
205 def_bool y
206
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207config KEXEC
208 bool "kexec system call (EXPERIMENTAL)"
fd4ba7e2 209 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
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210 help
211 kexec is a system call that implements the ability to shutdown your
212 current kernel, and to start another kernel. It is like a reboot
1f1332f7 213 but it is independent of the system firmware. And like a reboot
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214 you can start any kernel with it, not just Linux.
215
1f1332f7 216 The name comes from the similarity to the exec system call.
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217
218 It is an ongoing process to be certain the hardware in a machine
219 is properly shutdown, so do not be surprised if this code does not
220 initially work for you. It may help to enable device hotplugging
221 support. As of this writing the exact hardware interface is
222 strongly in flux, so no good recommendation can be made.
223
e8625d46 224config CRASH_DUMP
cd9c99d7 225 bool "Build a kdump crash kernel (EXPERIMENTAL)"
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226 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
227 help
228 Build a kernel suitable for use as a kdump capture kernel.
229 The kernel will be linked at a different address than normal, and
230 so can only be used for Kdump.
231
232 Don't change this unless you know what you are doing.
233
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234config PPCBUG_NVRAM
235 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
236 default y if PPC_PREP
237
238config IRQ_ALL_CPUS
239 bool "Distribute interrupts on all CPUs by default"
240 depends on SMP && !MV64360
241 help
242 This option gives the kernel permission to distribute IRQs across
243 multiple CPUs. Saying N here will route all IRQs to the first
244 CPU. Generally saying Y is safe, although some problems have been
245 reported with SMP Power Macintoshes with this option enabled.
246
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247config NUMA
248 bool "NUMA support"
249 depends on PPC64
250 default y if SMP && PPC_PSERIES
251
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252config NODES_SHIFT
253 int
254 default "4"
255 depends on NEED_MULTIPLE_NODES
256
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257config ARCH_SELECT_MEMORY_MODEL
258 def_bool y
259 depends on PPC64
260
261config ARCH_FLATMEM_ENABLE
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262 def_bool y
263 depends on (PPC64 && !NUMA) || PPC32
14cf11af 264
45fb6cea 265config ARCH_SPARSEMEM_ENABLE
14cf11af 266 def_bool y
9100b205 267 depends on PPC64
14cf11af 268
45fb6cea 269config ARCH_SPARSEMEM_DEFAULT
14cf11af 270 def_bool y
78bde53e 271 depends on (SMP && PPC_PSERIES) || PPC_PS3
14cf11af 272
c67c3cb4 273config ARCH_POPULATES_NODE_MAP
14cf11af 274 def_bool y
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275
276source "mm/Kconfig"
14cf11af 277
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278config ARCH_MEMORY_PROBE
279 def_bool y
280 depends on MEMORY_HOTPLUG
281
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282# Some NUMA nodes have memory ranges that span
283# other nodes. Even though a pfn is valid and
284# between a node's start and end pfns, it may not
285# reside on that node. See memmap_init_zone()
286# for details.
287config NODES_SPAN_OTHER_NODES
288 def_bool y
289 depends on NEED_MULTIPLE_NODES
290
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291config PPC_HAS_HASH_64K
292 bool
293 depends on PPC64
294 default n
295
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296config PPC_64K_PAGES
297 bool "64k page size"
863c84b9 298 depends on PPC64
16c2d476 299 select PPC_HAS_HASH_64K
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300 help
301 This option changes the kernel logical page size to 64k. On machines
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302 without processor support for 64k pages, the kernel will simulate
303 them by loading each individual 4k page on demand transparently,
304 while on hardware with such support, it will be used to map
305 normal application pages.
3c726f8d 306
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307config SCHED_SMT
308 bool "SMT (Hyperthreading) scheduler support"
309 depends on PPC64 && SMP
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310 help
311 SMT scheduler support improves the CPU scheduler's decision making
312 when dealing with POWER5 cpus at a cost of slightly increased
313 overhead in some places. If unsure say N here.
314
315config PROC_DEVICETREE
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316 bool "Support for device tree in /proc"
317 depends on PROC_FS
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318 help
319 This option adds a device-tree directory under /proc which contains
320 an image of the device tree that the kernel copies from Open
5f296755 321 Firmware or other boot firmware. If unsure, say Y here.
14cf11af 322
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323config CMDLINE_BOOL
324 bool "Default bootloader kernel arguments"
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325
326config CMDLINE
327 string "Initial kernel command string"
328 depends on CMDLINE_BOOL
329 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
330 help
331 On some platforms, there is currently no way for the boot loader to
332 pass arguments to the kernel. For these platforms, you can supply
333 some command-line options at build time by entering them here. In
334 most cases you will need to specify the root device here.
335
336if !44x || BROKEN
337source kernel/power/Kconfig
338endif
339
340config SECCOMP
341 bool "Enable seccomp to safely compute untrusted bytecode"
342 depends on PROC_FS
343 default y
344 help
345 This kernel feature is useful for number crunching applications
346 that may need to compute untrusted bytecode during their
347 execution. By using pipes or other transports made available to
348 the process as file descriptors supporting the read/write
349 syscalls, it's possible to isolate those applications in
350 their own address space using seccomp. Once seccomp is
351 enabled via /proc/<pid>/seccomp, it cannot be disabled
352 and the task is only allowed to execute a few safe syscalls
353 defined by each seccomp mode.
354
355 If unsure, say Y. Only embedded should say N here.
356
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357config WANT_DEVICE_TREE
358 bool
359 default n
360
361config DEVICE_TREE
362 string "Static device tree source file"
363 depends on WANT_DEVICE_TREE
364 help
365 This specifies the device tree source (.dts) file to be
366 compiled and included when building the bootwrapper. If a
367 relative filename is given, then it will be relative to
368 arch/powerpc/boot/dts. If you are not using the bootwrapper,
369 or do not need to build a dts into the bootwrapper, this
370 field is ignored.
371
372 For example, this is required when building a cuImage target
373 for an older U-Boot, which cannot pass a device tree itself.
374 Such a kernel will not work with a newer U-Boot that tries to
375 pass a device tree (unless you tell it not to). If your U-Boot
376 does not mention a device tree in "help bootm", then use the
377 cuImage target and specify a device tree here. Otherwise, use
378 the uImage target and leave this field blank.
379
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380endmenu
381
382config ISA_DMA_API
383 bool
384 default y
385
386menu "Bus options"
387
388config ISA
389 bool "Support for ISA-bus hardware"
390 depends on PPC_PREP || PPC_CHRP
f9bd170a 391 select PPC_I8259
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392 help
393 Find out whether you have ISA slots on your motherboard. ISA is the
394 name of a bus system, i.e. the way the CPU talks to the other stuff
395 inside your box. If you have an Apple machine, say N here; if you
396 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
397 you have an embedded board, consult your board documentation.
398
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399config ZONE_DMA
400 bool
401 default y
402
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403config GENERIC_ISA_DMA
404 bool
405 depends on PPC64 || POWER4 || 6xx && !CPM2
406 default y
407
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408config PPC_INDIRECT_PCI
409 bool
410 depends on PCI
63dafe57 411 default y if 40x || 44x
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412 default n
413
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414config PPC_INDIRECT_PCI_BE
415 bool
416 depends PPC_INDIRECT_PCI
417 default n
418
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419config EISA
420 bool
421
422config SBUS
423 bool
424
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425config FSL_SOC
426 bool
427
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428# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
429config MCA
430 bool
431
432config PCI
53158620 433 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
bed59275 434 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
d3c7ffab 435 || PPC_PS3
f21f49ea 436 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
53158620 437 && !PPC_85xx && !PPC_86xx
f21f49ea 438 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
14cf11af 439 default PCI_QSPAN if !4xx && !CPM2 && 8xx
df87ef55 440 select ARCH_SUPPORTS_MSI
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441 help
442 Find out whether your system includes a PCI bus. PCI is the name of
443 a bus system, i.e. the way the CPU talks to the other stuff inside
444 your box. If you say Y here, the kernel will include drivers and
445 infrastructure code to support PCI bus devices.
446
447config PCI_DOMAINS
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448 def_bool PCI
449
450config PCI_SYSCALL
451 def_bool PCI
14cf11af 452
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453config PCI_QSPAN
454 bool "QSpan PCI"
455 depends on !4xx && !CPM2 && 8xx
f9bd170a 456 select PPC_I8259
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457 help
458 Say Y here if you have a system based on a Motorola 8xx-series
459 embedded processor with a QSPAN PCI interface, otherwise say N.
460
461config PCI_8260
462 bool
463 depends on PCI && 8260
25635c71 464 select PPC_INDIRECT_PCI
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465 default y
466
467config 8260_PCI9
4a3ecc62 468 bool "Enable workaround for MPC826x erratum PCI 9"
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469 depends on PCI_8260 && !ADS8272
470 default y
471
472choice
4a3ecc62 473 prompt "IDMA channel for PCI 9 workaround"
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474 depends on 8260_PCI9
475
476config 8260_PCI9_IDMA1
477 bool "IDMA1"
478
479config 8260_PCI9_IDMA2
480 bool "IDMA2"
481
482config 8260_PCI9_IDMA3
483 bool "IDMA3"
484
485config 8260_PCI9_IDMA4
486 bool "IDMA4"
487
488endchoice
489
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490source "drivers/pci/pcie/Kconfig"
491
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492source "drivers/pci/Kconfig"
493
494source "drivers/pcmcia/Kconfig"
495
496source "drivers/pci/hotplug/Kconfig"
497
498endmenu
499
500menu "Advanced setup"
501 depends on PPC32
502
503config ADVANCED_OPTIONS
504 bool "Prompt for advanced kernel configuration options"
505 help
506 This option will enable prompting for a variety of advanced kernel
507 configuration options. These options can cause the kernel to not
508 work if they are set incorrectly, but can be used to optimize certain
509 aspects of kernel memory management.
510
511 Unless you know what you are doing, say N here.
512
513comment "Default settings for advanced configuration options are used"
514 depends on !ADVANCED_OPTIONS
515
516config HIGHMEM_START_BOOL
517 bool "Set high memory pool address"
518 depends on ADVANCED_OPTIONS && HIGHMEM
519 help
520 This option allows you to set the base address of the kernel virtual
521 area used to map high memory pages. This can be useful in
522 optimizing the layout of kernel virtual memory.
523
524 Say N here unless you know what you are doing.
525
526config HIGHMEM_START
527 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
528 default "0xfe000000"
529
530config LOWMEM_SIZE_BOOL
531 bool "Set maximum low memory"
532 depends on ADVANCED_OPTIONS
533 help
534 This option allows you to set the maximum amount of memory which
535 will be used as "low memory", that is, memory which the kernel can
536 access directly, without having to set up a kernel virtual mapping.
537 This can be useful in optimizing the layout of kernel virtual
538 memory.
539
540 Say N here unless you know what you are doing.
541
542config LOWMEM_SIZE
543 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
544 default "0x30000000"
545
546config KERNEL_START_BOOL
547 bool "Set custom kernel base address"
548 depends on ADVANCED_OPTIONS
549 help
550 This option allows you to set the kernel virtual address at which
551 the kernel will map low memory (the kernel image will be linked at
552 this address). This can be useful in optimizing the virtual memory
553 layout of the system.
554
555 Say N here unless you know what you are doing.
556
557config KERNEL_START
558 hex "Virtual address of kernel base" if KERNEL_START_BOOL
559 default "0xc0000000"
560
561config TASK_SIZE_BOOL
562 bool "Set custom user task size"
563 depends on ADVANCED_OPTIONS
564 help
565 This option allows you to set the amount of virtual address space
566 allocated to user tasks. This can be useful in optimizing the
567 virtual memory layout of the system.
568
569 Say N here unless you know what you are doing.
570
571config TASK_SIZE
572 hex "Size of user task space" if TASK_SIZE_BOOL
573 default "0x80000000"
574
575config CONSISTENT_START_BOOL
576 bool "Set custom consistent memory pool address"
577 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
578 help
579 This option allows you to set the base virtual address
4b3f686d 580 of the consistent memory pool. This pool of virtual
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581 memory is used to make consistent memory allocations.
582
583config CONSISTENT_START
584 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
585 default "0xff100000" if NOT_COHERENT_CACHE
586
587config CONSISTENT_SIZE_BOOL
588 bool "Set custom consistent memory pool size"
589 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
590 help
4b3f686d 591 This option allows you to set the size of the
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592 consistent memory pool. This pool of virtual memory
593 is used to make consistent memory allocations.
594
595config CONSISTENT_SIZE
596 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
597 default "0x00200000" if NOT_COHERENT_CACHE
598
599config BOOT_LOAD_BOOL
600 bool "Set the boot link/load address"
601 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
602 help
603 This option allows you to set the initial load address of the zImage
604 or zImage.initrd file. This can be useful if you are on a board
605 which has a small amount of memory.
606
607 Say N here unless you know what you are doing.
608
609config BOOT_LOAD
610 hex "Link/load address for booting" if BOOT_LOAD_BOOL
611 default "0x00400000" if 40x || 8xx || 8260
612 default "0x01000000" if 44x
613 default "0x00800000"
614
615config PIN_TLB
616 bool "Pinned Kernel TLBs (860 ONLY)"
617 depends on ADVANCED_OPTIONS && 8xx
618endmenu
619
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620if PPC64
621config KERNEL_START
622 hex
eeb2d218 623 default "0xc000000000000000"
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624endif
625
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626source "net/Kconfig"
627
628source "drivers/Kconfig"
629
630source "fs/Kconfig"
631
632# XXX source "arch/ppc/8xx_io/Kconfig"
633
634# XXX source "arch/ppc/8260_io/Kconfig"
635
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636source "arch/powerpc/sysdev/qe_lib/Kconfig"
637
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638source "lib/Kconfig"
639
cd6b0762 640menu "Instrumentation Support"
98750261 641 depends on EXPERIMENTAL
cd6b0762 642
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643source "arch/powerpc/oprofile/Kconfig"
644
cd6b0762 645config KPROBES
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646 bool "Kprobes"
647 depends on !BOOKE && !4xx && KALLSYMS && MODULES
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648 help
649 Kprobes allows you to trap at almost any kernel address and
650 execute a callback function. register_kprobe() establishes
651 a probepoint and specifies the callback. Kprobes is useful
652 for kernel debugging, non-intrusive instrumentation and testing.
653 If in doubt, say "N".
654endmenu
655
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656source "arch/powerpc/Kconfig.debug"
657
658source "security/Kconfig"
659
660config KEYS_COMPAT
661 bool
662 depends on COMPAT && KEYS
663 default y
664
665source "crypto/Kconfig"