Kconfig 17.3 KB
Newer Older
1 2 3 4 5 6
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#

mainmenu "Linux/PowerPC Kernel Configuration"

7
source "arch/powerpc/platforms/Kconfig.cputype"
8

9 10 11 12 13 14 15 16
config PPC32
	bool
	default y if !PPC64

config 64BIT
	bool
	default y if PPC64

17 18 19 20 21
config WORD_SIZE
	int
	default 64 if PPC64
	default 32 if !PPC64

22 23 24 25 26 27 28
config PPC_MERGE
	def_bool y

config MMU
	bool
	default y

29 30 31
config GENERIC_CMOS_UPDATE
	def_bool y

32 33 34 35 36 37
config GENERIC_TIME
	def_bool y

config GENERIC_TIME_VSYSCALL
	def_bool y

38 39 40
config GENERIC_CLOCKEVENTS
	def_bool y

41 42 43 44
config GENERIC_HARDIRQS
	bool
	default y

45
config HAVE_SETUP_PER_CPU_AREA
46 47
	def_bool PPC64

48 49 50 51
config IRQ_PER_CPU
	bool
	default y

52 53 54 55 56 57 58
config RWSEM_GENERIC_SPINLOCK
	bool

config RWSEM_XCHGADD_ALGORITHM
	bool
	default y

N
Nick Piggin 已提交
59 60 61 62 63
config GENERIC_LOCKBREAK
	bool
	default y
	depends on SMP && PREEMPT

64 65
config ARCH_HAS_ILOG2_U32
	bool
66
	default y
67 68 69

config ARCH_HAS_ILOG2_U64
	bool
70
	default y if 64BIT
71

72 73 74 75
config GENERIC_HWEIGHT
	bool
	default y

76 77 78 79
config GENERIC_CALIBRATE_DELAY
	bool
	default y

80 81 82 83
config GENERIC_FIND_NEXT_BIT
	bool
	default y

S
Stephen Rothwell 已提交
84 85 86
config ARCH_NO_VIRT_TO_BUS
	def_bool PPC64

87 88 89 90 91 92
config PPC
	bool
	default y

config EARLY_PRINTK
	bool
93
	default y
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114

config COMPAT
	bool
	default y if PPC64

config SYSVIPC_COMPAT
	bool
	depends on COMPAT && SYSVIPC
	default y

# All PPC32s use generic nvram driver through ppc_md
config GENERIC_NVRAM
	bool
	default y if PPC32

config SCHED_NO_NO_OMIT_FRAME_POINTER
	bool
	default y

config ARCH_MAY_HAVE_PC_FDC
	bool
115
	default !PPC_PSERIES || PCI
116

117 118 119
config PPC_OF
	def_bool y

120 121 122
config OF
	def_bool y

123 124 125 126 127 128 129 130 131
config PPC_UDBG_16550
	bool
	default n

config GENERIC_TBSYNC
	bool
	default y if PPC32 && SMP
	default n

132 133 134 135
config AUDIT_ARCH
	bool
	default y

136 137 138 139 140
config GENERIC_BUG
	bool
	default y
	depends on BUG

141
config SYS_SUPPORTS_APM_EMULATION
K
Kumar Gala 已提交
142
	default y if PMAC_APM_EMU
143 144
	bool

145 146 147 148 149 150
config DEFAULT_UIMAGE
	bool
	help
	  Used to allow a board to specify it wants a uImage built by default
	default n

151 152 153
config REDBOOT
	bool

154
config HIBERNATE_32
155
	bool
156 157 158 159 160 161 162 163 164 165 166
	depends on (PPC_PMAC && !SMP) || BROKEN
	default y

config HIBERNATE_64
	bool
	depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
	default y

config ARCH_HIBERNATION_POSSIBLE
	bool
	depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
167 168
	default y

169 170 171 172 173 174 175 176 177 178 179 180 181
config PPC_DCR_NATIVE
	bool
	default n

config PPC_DCR_MMIO
	bool
	default n

config PPC_DCR
	bool
	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
	default y

182 183
config PPC_OF_PLATFORM_PCI
	bool
184
	depends on PCI
185 186 187
	depends on PPC64 # not supported on 32 bits yet
	default n

188 189
source "init/Kconfig"

190
source "arch/powerpc/sysdev/Kconfig"
191
source "arch/powerpc/platforms/Kconfig"
192 193 194 195 196 197 198

menu "Kernel options"

config HIGHMEM
	bool "High memory support"
	depends on PPC32

199
source kernel/time/Kconfig
200 201 202 203 204 205 206 207 208 209
source kernel/Kconfig.hz
source kernel/Kconfig.preempt
source "fs/Kconfig.binfmt"

# We optimistically allocate largepages from the VM, so make the limit
# large enough (16MB). This badly named config option is actually
# max order + 1
config FORCE_MAX_ZONEORDER
	int
	depends on PPC64
M
Mike Kravetz 已提交
210
	default "9" if PPC_64K_PAGES
211 212
	default "13"

213 214 215 216 217
config HUGETLB_PAGE_SIZE_VARIABLE
	bool
	depends on HUGETLB_PAGE
	default y

218 219
config MATH_EMULATION
	bool "Math emulation"
220
	depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
221 222 223 224 225 226 227 228
	---help---
	  Some PowerPC chips designed for embedded applications do not have
	  a floating-point unit and therefore do not implement the
	  floating-point instructions in the PowerPC instruction set.  If you
	  say Y here, the kernel will include code to emulate a floating-point
	  unit, which will allow programs that use floating-point
	  instructions to run.

229 230 231 232 233 234 235 236 237 238 239
config 8XX_MINIMAL_FPEMU
	bool "Minimal math emulation for 8xx"
	depends on 8xx && !MATH_EMULATION
	help
	  Older arch/ppc kernels still emulated a few floating point
	  instructions such as load and store, even when full math
	  emulation is disabled.  Say "Y" here if you want to preserve
	  this behavior.

	  It is recommended that you build a soft-float userspace instead.

240
config IOMMU_VMERGE
241 242 243
	bool "Enable IOMMU virtual merging"
	depends on PPC64
	default y
244 245 246 247 248
	help
	  Cause IO segments sent to a device for DMA to be merged virtually
	  by the IOMMU when they happen to have been allocated contiguously.
	  This doesn't add pressure to the IOMMU allocator. However, some
	  drivers don't support getting large merged segments coming back
249 250 251
	  from *_map_sg().

	  Most drivers don't have this problem; it is safe to say Y here.
252 253 254 255 256 257 258 259 260 261

config HOTPLUG_CPU
	bool "Support for enabling/disabling CPUs"
	depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
	---help---
	  Say Y here to be able to disable and re-enable individual
	  CPUs at runtime on SMP machines.

	  Say N if you are unsure.

262 263 264
config ARCH_ENABLE_MEMORY_HOTPLUG
	def_bool y

265 266
config KEXEC
	bool "kexec system call (EXPERIMENTAL)"
267
	depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
268 269 270
	help
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
271
	  but it is independent of the system firmware.   And like a reboot
272 273
	  you can start any kernel with it, not just Linux.

274
	  The name comes from the similarity to the exec system call.
275 276 277 278 279 280 281

	  It is an ongoing process to be certain the hardware in a machine
	  is properly shutdown, so do not be surprised if this code does not
	  initially work for you.  It may help to enable device hotplugging
	  support.  As of this writing the exact hardware interface is
	  strongly in flux, so no good recommendation can be made.

282
config CRASH_DUMP
283
	bool "Build a kdump crash kernel (EXPERIMENTAL)"
284 285 286 287 288 289 290 291
	depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
	help
	  Build a kernel suitable for use as a kdump capture kernel.
	  The kernel will be linked at a different address than normal, and
	  so can only be used for Kdump.

	  Don't change this unless you know what you are doing.

292 293 294 295 296 297 298 299 300 301 302 303 304
config PPCBUG_NVRAM
	bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
	default y if PPC_PREP

config IRQ_ALL_CPUS
	bool "Distribute interrupts on all CPUs by default"
	depends on SMP && !MV64360
	help
	  This option gives the kernel permission to distribute IRQs across
	  multiple CPUs.  Saying N here will route all IRQs to the first
	  CPU.  Generally saying Y is safe, although some problems have been
	  reported with SMP Power Macintoshes with this option enabled.

305 306 307 308 309
config NUMA
	bool "NUMA support"
	depends on PPC64
	default y if SMP && PPC_PSERIES

Y
Yasunori Goto 已提交
310 311 312 313 314
config NODES_SHIFT
	int
	default "4"
	depends on NEED_MULTIPLE_NODES

315 316 317 318 319
config ARCH_SELECT_MEMORY_MODEL
	def_bool y
	depends on PPC64

config ARCH_FLATMEM_ENABLE
320 321
	def_bool y
	depends on (PPC64 && !NUMA) || PPC32
322

323
config ARCH_SPARSEMEM_ENABLE
324
	def_bool y
325
	depends on PPC64
A
Andy Whitcroft 已提交
326
	select SPARSEMEM_VMEMMAP_ENABLE
327

328
config ARCH_SPARSEMEM_DEFAULT
329
	def_bool y
330
	depends on (SMP && PPC_PSERIES) || PPC_PS3
331

332
config ARCH_POPULATES_NODE_MAP
333
	def_bool y
334 335

source "mm/Kconfig"
336

M
Mike Kravetz 已提交
337 338 339 340
config ARCH_MEMORY_PROBE
	def_bool y
	depends on MEMORY_HOTPLUG

341 342 343 344 345 346 347 348 349
# Some NUMA nodes have memory ranges that span
# other nodes.  Even though a pfn is valid and
# between a node's start and end pfns, it may not
# reside on that node.  See memmap_init_zone()
# for details.
config NODES_SPAN_OTHER_NODES
	def_bool y
	depends on NEED_MULTIPLE_NODES

350 351 352 353 354
config PPC_HAS_HASH_64K
	bool
	depends on PPC64
	default n

355 356
config PPC_64K_PAGES
	bool "64k page size"
357
	depends on PPC64
358
	select PPC_HAS_HASH_64K
359 360
	help
	  This option changes the kernel logical page size to 64k. On machines
361 362 363 364
	  without processor support for 64k pages, the kernel will simulate
	  them by loading each individual 4k page on demand transparently,
	  while on hardware with such support, it will be used to map
	  normal application pages.
365

366 367 368 369 370 371 372 373
config PPC_SUBPAGE_PROT
	bool "Support setting protections for 4k subpages"
	depends on PPC_64K_PAGES
	help
	  This option adds support for a system call to allow user programs
	  to set access permissions (read/write, readonly, or no access)
	  on the 4k subpages of each 64k page.

374 375 376 377 378 379 380 381 382
config SCHED_SMT
	bool "SMT (Hyperthreading) scheduler support"
	depends on PPC64 && SMP
	help
	  SMT scheduler support improves the CPU scheduler's decision making
	  when dealing with POWER5 cpus at a cost of slightly increased
	  overhead in some places. If unsure say N here.

config PROC_DEVICETREE
383 384
	bool "Support for device tree in /proc"
	depends on PROC_FS
385 386 387
	help
	  This option adds a device-tree directory under /proc which contains
	  an image of the device tree that the kernel copies from Open
388
	  Firmware or other boot firmware. If unsure, say Y here.
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423

config CMDLINE_BOOL
	bool "Default bootloader kernel arguments"

config CMDLINE
	string "Initial kernel command string"
	depends on CMDLINE_BOOL
	default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
	help
	  On some platforms, there is currently no way for the boot loader to
	  pass arguments to the kernel. For these platforms, you can supply
	  some command-line options at build time by entering them here.  In
	  most cases you will need to specify the root device here.

if !44x || BROKEN
source kernel/power/Kconfig
endif

config SECCOMP
	bool "Enable seccomp to safely compute untrusted bytecode"
	depends on PROC_FS
	default y
	help
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via /proc/<pid>/seccomp, it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

	  If unsure, say Y. Only embedded should say N here.

424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446
config WANT_DEVICE_TREE
	bool
	default n

config DEVICE_TREE
	string "Static device tree source file"
	depends on WANT_DEVICE_TREE
	help
	  This specifies the device tree source (.dts) file to be
	  compiled and included when building the bootwrapper.  If a
	  relative filename is given, then it will be relative to
	  arch/powerpc/boot/dts.  If you are not using the bootwrapper,
	  or do not need to build a dts into the bootwrapper, this
	  field is ignored.

	  For example, this is required when building a cuImage target
	  for an older U-Boot, which cannot pass a device tree itself.
	  Such a kernel will not work with a newer U-Boot that tries to
	  pass a device tree (unless you tell it not to).  If your U-Boot
	  does not mention a device tree in "help bootm", then use the
	  cuImage target and specify a device tree here.  Otherwise, use
	  the uImage target and leave this field blank.

447 448 449 450
endmenu

config ISA_DMA_API
	bool
451
	default !PPC_ISERIES || PCI
452 453 454 455 456 457

menu "Bus options"

config ISA
	bool "Support for ISA-bus hardware"
	depends on PPC_PREP || PPC_CHRP
458
	select PPC_I8259
459 460 461 462 463 464 465
	help
	  Find out whether you have ISA slots on your motherboard.  ISA is the
	  name of a bus system, i.e. the way the CPU talks to the other stuff
	  inside your box.  If you have an Apple machine, say N here; if you
	  have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
	  you have an embedded board, consult your board documentation.

466 467 468 469
config ZONE_DMA
	bool
	default y

470 471 472 473 474
config GENERIC_ISA_DMA
	bool
	depends on PPC64 || POWER4 || 6xx && !CPM2
	default y

475 476 477
config PPC_INDIRECT_PCI
	bool
	depends on PCI
478
	default y if 40x || 44x
479 480
	default n

481 482 483 484 485 486
config EISA
	bool

config SBUS
	bool

487 488 489
config FSL_SOC
	bool

490 491 492 493
config FSL_PCI
 	bool
	select PPC_INDIRECT_PCI

494 495 496 497 498
# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
config MCA
	bool

config PCI
499
	bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
500
		|| PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
501
		|| PPC_PS3 || 44x
502
	default y if !40x && !CPM2 && !8xx && !PPC_83xx \
503
		&& !PPC_85xx && !PPC_86xx
504
	default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
505
	default PCI_QSPAN if !4xx && !CPM2 && 8xx
506
	select ARCH_SUPPORTS_MSI
507 508 509 510 511 512 513
	help
	  Find out whether your system includes a PCI bus. PCI is the name of
	  a bus system, i.e. the way the CPU talks to the other stuff inside
	  your box.  If you say Y here, the kernel will include drivers and
	  infrastructure code to support PCI bus devices.

config PCI_DOMAINS
514 515 516 517
	def_bool PCI

config PCI_SYSCALL
	def_bool PCI
518 519 520 521

config PCI_QSPAN
	bool "QSpan PCI"
	depends on !4xx && !CPM2 && 8xx
522
	select PPC_I8259
523 524 525 526 527 528 529
	help
	  Say Y here if you have a system based on a Motorola 8xx-series
	  embedded processor with a QSPAN PCI interface, otherwise say N.

config PCI_8260
	bool
	depends on PCI && 8260
530
	select PPC_INDIRECT_PCI
531 532 533
	default y

config 8260_PCI9
534
	bool "Enable workaround for MPC826x erratum PCI 9"
535
	depends on PCI_8260 && !8272
536 537 538
	default y

choice
539
	prompt "IDMA channel for PCI 9 workaround"
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555
	depends on 8260_PCI9

config 8260_PCI9_IDMA1
	bool "IDMA1"

config 8260_PCI9_IDMA2
	bool "IDMA2"

config 8260_PCI9_IDMA3
	bool "IDMA3"

config 8260_PCI9_IDMA4
	bool "IDMA4"

endchoice

556 557
source "drivers/pci/pcie/Kconfig"

558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

source "drivers/pci/hotplug/Kconfig"

endmenu

menu "Advanced setup"
	depends on PPC32

config ADVANCED_OPTIONS
	bool "Prompt for advanced kernel configuration options"
	help
	  This option will enable prompting for a variety of advanced kernel
	  configuration options.  These options can cause the kernel to not
	  work if they are set incorrectly, but can be used to optimize certain
	  aspects of kernel memory management.

	  Unless you know what you are doing, say N here.

comment "Default settings for advanced configuration options are used"
	depends on !ADVANCED_OPTIONS

config HIGHMEM_START_BOOL
	bool "Set high memory pool address"
	depends on ADVANCED_OPTIONS && HIGHMEM
	help
	  This option allows you to set the base address of the kernel virtual
	  area used to map high memory pages.  This can be useful in
	  optimizing the layout of kernel virtual memory.

	  Say N here unless you know what you are doing.

config HIGHMEM_START
	hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
	default "0xfe000000"

config LOWMEM_SIZE_BOOL
	bool "Set maximum low memory"
	depends on ADVANCED_OPTIONS
	help
	  This option allows you to set the maximum amount of memory which
	  will be used as "low memory", that is, memory which the kernel can
	  access directly, without having to set up a kernel virtual mapping.
	  This can be useful in optimizing the layout of kernel virtual
	  memory.

	  Say N here unless you know what you are doing.

config LOWMEM_SIZE
	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
	default "0x30000000"

config KERNEL_START_BOOL
	bool "Set custom kernel base address"
	depends on ADVANCED_OPTIONS
	help
	  This option allows you to set the kernel virtual address at which
	  the kernel will map low memory (the kernel image will be linked at
	  this address).  This can be useful in optimizing the virtual memory
	  layout of the system.

	  Say N here unless you know what you are doing.

config KERNEL_START
	hex "Virtual address of kernel base" if KERNEL_START_BOOL
	default "0xc0000000"

config TASK_SIZE_BOOL
	bool "Set custom user task size"
	depends on ADVANCED_OPTIONS
	help
	  This option allows you to set the amount of virtual address space
	  allocated to user tasks.  This can be useful in optimizing the
	  virtual memory layout of the system.

	  Say N here unless you know what you are doing.

config TASK_SIZE
	hex "Size of user task space" if TASK_SIZE_BOOL
639 640
	default "0x80000000" if PPC_PREP || PPC_8xx
	default "0xc0000000"
641 642 643 644 645 646

config CONSISTENT_START_BOOL
	bool "Set custom consistent memory pool address"
	depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
	help
	  This option allows you to set the base virtual address
M
Matt LaPlante 已提交
647
	  of the consistent memory pool.  This pool of virtual
648 649 650 651
	  memory is used to make consistent memory allocations.

config CONSISTENT_START
	hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
S
Scott Wood 已提交
652
	default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
653 654 655 656 657 658
	default "0xff100000" if NOT_COHERENT_CACHE

config CONSISTENT_SIZE_BOOL
	bool "Set custom consistent memory pool size"
	depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
	help
M
Matt LaPlante 已提交
659
	  This option allows you to set the size of the
660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
	  consistent memory pool.  This pool of virtual memory
	  is used to make consistent memory allocations.

config CONSISTENT_SIZE
	hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
	default "0x00200000" if NOT_COHERENT_CACHE

config BOOT_LOAD_BOOL
	bool "Set the boot link/load address"
	depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
	help
	  This option allows you to set the initial load address of the zImage
	  or zImage.initrd file.  This can be useful if you are on a board
	  which has a small amount of memory.

	  Say N here unless you know what you are doing.

config BOOT_LOAD
	hex "Link/load address for booting" if BOOT_LOAD_BOOL
	default "0x00400000" if 40x || 8xx || 8260
	default "0x01000000" if 44x
	default "0x00800000"

config PIN_TLB
	bool "Pinned Kernel TLBs (860 ONLY)"
	depends on ADVANCED_OPTIONS && 8xx
endmenu

S
Stephen Rothwell 已提交
688 689 690
if PPC64
config KERNEL_START
	hex
S
Stephen Rothwell 已提交
691
	default "0xc000000000000000"
S
Stephen Rothwell 已提交
692 693
endif

694 695 696 697 698 699 700 701 702 703
source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

# XXX source "arch/ppc/8xx_io/Kconfig"

# XXX source "arch/ppc/8260_io/Kconfig"

704 705
source "arch/powerpc/sysdev/qe_lib/Kconfig"

706 707
source "lib/Kconfig"

708
source "kernel/Kconfig.instrumentation"
709

710 711 712 713 714 715 716 717 718 719
source "arch/powerpc/Kconfig.debug"

source "security/Kconfig"

config KEYS_COMPAT
	bool
	depends on COMPAT && KEYS
	default y

source "crypto/Kconfig"
720 721 722 723

config PPC_CLOCK
	bool
	default n
724 725 726 727

config PPC_LIB_RHEAP
	bool