2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
16 config RWSEM_GENERIC_SPINLOCK
19 config RWSEM_XCHGADD_ALGORITHM
23 config GENERIC_CALIBRATE_DELAY
27 config GENERIC_ISA_DMA
43 config SCHED_NO_NO_OMIT_FRAME_POINTER
47 # We optimistically allocate largepages from the VM, so make the limit
48 # large enough (16MB). This badly named config option is actually
50 config FORCE_MAX_ZONEORDER
58 depends on COMPAT && SYSVIPC
61 menu "Platform support"
64 prompt "Platform Type"
65 default PPC_MULTIPLATFORM
68 bool "IBM Legacy iSeries"
70 config PPC_MULTIPLATFORM
76 depends on PPC_MULTIPLATFORM
77 bool " IBM pSeries & new iSeries"
81 bool " Broadband Processor Architecture"
82 depends on PPC_MULTIPLATFORM
85 depends on PPC_MULTIPLATFORM
86 bool " Apple G5 based machines"
91 depends on PPC_MULTIPLATFORM
92 bool " Maple 970FX Evaluation Board"
97 This option enables support for the Maple 970FX Evaluation Board.
98 For more informations, refer to <http://www.970eval.com>
109 depends on PPC_MULTIPLATFORM
114 depends on PPC_PSERIES
119 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
128 # VMX is pSeries only for now until somebody writes the iSeries
129 # exception vectors for it
131 bool "Support for VMX (Altivec) vector unit"
132 depends on PPC_MULTIPLATFORM
136 depends on PPC_PSERIES
137 bool "Support for shared-processor logical partitions"
140 Enabling this option will make the kernel run more efficiently
141 on logically-partitioned pSeries systems which use shared
142 processors, that is, which share physical processors between
143 two or more partitions.
146 depends on PPC_PSERIES || PPC_ISERIES
152 depends on PPC_MULTIPLATFORM
155 config MPIC_BROKEN_U3
166 bool "Support for early boot text console"
169 Say Y here to see progress messages from the boot firmware in text
170 mode. Requires an Open Firmware compatible video card.
173 bool "Optimize for POWER4"
176 Cause the compiler to optimize for POWER4 processors. The resulting
177 binary will not work on POWER3 or RS64 processors when compiled with
178 binutils 2.15 or later.
181 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
182 depends on EXPERIMENTAL
185 Cause IO segments sent to a device for DMA to be merged virtually
186 by the IOMMU when they happen to have been allocated contiguously.
187 This doesn't add pressure to the IOMMU allocator. However, some
188 drivers don't support getting large merged segments coming back
189 from *_map_sg(). Say Y if you know the drivers you are using are
190 properly handling this case.
193 bool "Symmetric multi-processing support"
195 This enables support for systems with more than one CPU. If you have
196 a system with only one CPU, say N. If you have a system with more
199 If you say N here, the kernel will run on single and multiprocessor
200 machines, but will use only one CPU of a multiprocessor machine. If
201 you say Y here, the kernel will run on single-processor machines.
202 On a single-processor machine, the kernel will run faster if you say
205 If you don't know what to do here, say Y.
208 int "Maximum number of CPUs (2-128)"
214 bool "Hardware multithreading"
215 depends on SMP && PPC_PSERIES && BROKEN
217 This option enables hardware multithreading on RS64 cpus.
218 pSeries systems p620 and p660 have such a cpu type.
220 config ARCH_SELECT_MEMORY_MODEL
223 config ARCH_FLATMEM_ENABLE
227 config ARCH_DISCONTIGMEM_ENABLE
229 depends on SMP && PPC_PSERIES
231 config ARCH_DISCONTIGMEM_DEFAULT
233 depends on ARCH_DISCONTIGMEM_ENABLE
235 config ARCH_FLATMEM_ENABLE
238 config ARCH_SPARSEMEM_ENABLE
240 depends on ARCH_DISCONTIGMEM_ENABLE
244 config HAVE_ARCH_EARLY_PFN_TO_NID
246 depends on NEED_MULTIPLE_NODES
248 # Some NUMA nodes have memory ranges that span
249 # other nodes. Even though a pfn is valid and
250 # between a node's start and end pfns, it may not
251 # reside on that node.
253 # This is a relatively temporary hack that should
254 # be able to go away when sparsemem is fully in
256 config NODES_SPAN_OTHER_NODES
258 depends on NEED_MULTIPLE_NODES
262 default y if DISCONTIGMEM || SPARSEMEM
265 bool "SMT (Hyperthreading) scheduler support"
269 SMT scheduler support improves the CPU scheduler's decision making
270 when dealing with POWER5 cpus at a cost of slightly increased
271 overhead in some places. If unsure say N here.
274 bool "Preemptible Kernel"
276 This option reduces the latency of the kernel when reacting to
277 real-time or interactive events by allowing a low priority process to
278 be preempted even if it is in kernel mode executing a system call.
280 Say Y here if you are building a kernel for a desktop, embedded
281 or real-time system. Say N if you are unsure.
284 bool "Preempt The Big Kernel Lock"
288 This option reduces the latency of the kernel by making the
289 big kernel lock preemptible.
291 Say Y here if you are building a kernel for a desktop system.
292 Say N if you are unsure.
295 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
296 depends on PPC_PSERIES
297 default y if !EMBEDDED
300 # Use the generic interrupt handling code in kernel/irq/:
302 config GENERIC_HARDIRQS
308 depends on PPC_ISERIES
314 depends on PPC_PSERIES || PPC_BPA
318 bool "Proc interface to RTAS"
323 tristate "Firmware flash interface"
327 tristate "Scanlog dump interface"
328 depends on RTAS_PROC && PPC_PSERIES
331 tristate "LPAR Configuration Data"
332 depends on PPC_PSERIES || PPC_ISERIES
334 Provide system capacity information via human readable
335 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
338 bool "Enable seccomp to safely compute untrusted bytecode"
342 This kernel feature is useful for number crunching applications
343 that may need to compute untrusted bytecode during their
344 execution. By using pipes or other transports made available to
345 the process as file descriptors supporting the read/write
346 syscalls, it's possible to isolate those applications in
347 their own address space using seccomp. Once seccomp is
348 enabled via /proc/<pid>/seccomp, it cannot be disabled
349 and the task is only allowed to execute a few safe syscalls
350 defined by each seccomp mode.
352 If unsure, say Y. Only embedded should say N here.
365 Find out whether you have ISA slots on your motherboard. ISA is the
366 name of a bus system, i.e. the way the CPU talks to the other stuff
367 inside your box. If you have an Apple machine, say N here; if you
368 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
369 you have an embedded board, consult your board documentation.
381 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
384 Find out whether your system includes a PCI bus. PCI is the name of
385 a bus system, i.e. the way the CPU talks to the other stuff inside
386 your box. If you say Y here, the kernel will include drivers and
387 infrastructure code to support PCI bus devices.
393 source "fs/Kconfig.binfmt"
395 source "drivers/pci/Kconfig"
398 bool "Support for hot-pluggable CPUs"
399 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
402 Say Y here to be able to turn CPUs off and on.
404 Say N if you are unsure.
406 source "drivers/pcmcia/Kconfig"
408 source "drivers/pci/hotplug/Kconfig"
410 config PROC_DEVICETREE
411 bool "Support for Open Firmware device tree in /proc"
412 depends on !PPC_ISERIES
414 This option adds a device-tree directory under /proc which contains
415 an image of the device tree that the kernel copies from Open
416 Firmware. If unsure, say Y here.
419 bool "Default bootloader kernel arguments"
420 depends on !PPC_ISERIES
423 string "Initial kernel command string"
424 depends on CMDLINE_BOOL
425 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
427 On some platforms, there is currently no way for the boot loader to
428 pass arguments to the kernel. For these platforms, you can supply
429 some command-line options at build time by entering them here. In
430 most cases you will need to specify the root device here.
434 source "drivers/Kconfig"
438 menu "iSeries device drivers"
439 depends on PPC_ISERIES
442 tristate "iSeries Virtual Console Support"
445 tristate "iSeries Virtual I/O disk support"
447 If you are running on an iSeries system and you want to use
448 virtual disks created and managed by OS/400, say Y.
451 tristate "iSeries Virtual I/O CD support"
453 If you are running Linux on an IBM iSeries system and you want to
454 read a CD drive owned by OS/400, say Y here.
457 tristate "iSeries Virtual Tape Support"
459 If you are running Linux on an iSeries system and you want Linux
460 to read and/or write a tape drive owned by OS/400, say Y here.
466 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
469 source "arch/ppc64/oprofile/Kconfig"
471 source "arch/ppc64/Kconfig.debug"
473 source "security/Kconfig"
477 depends on COMPAT && KEYS
480 source "crypto/Kconfig"