2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
19 config RWSEM_GENERIC_SPINLOCK
22 config RWSEM_XCHGADD_ALGORITHM
26 config GENERIC_CALIBRATE_DELAY
30 config GENERIC_ISA_DMA
42 config SCHED_NO_NO_OMIT_FRAME_POINTER
46 config ARCH_MAY_HAVE_PC_FDC
50 # We optimistically allocate largepages from the VM, so make the limit
51 # large enough (16MB). This badly named config option is actually
53 config FORCE_MAX_ZONEORDER
61 depends on COMPAT && SYSVIPC
64 menu "Platform support"
67 prompt "Platform Type"
68 default PPC_MULTIPLATFORM
71 bool "IBM Legacy iSeries"
73 config PPC_MULTIPLATFORM
79 depends on PPC_MULTIPLATFORM
80 bool " IBM pSeries & new iSeries"
84 bool " Broadband Processor Architecture"
85 depends on PPC_MULTIPLATFORM
88 depends on PPC_MULTIPLATFORM
89 bool " Apple G5 based machines"
94 depends on PPC_MULTIPLATFORM
95 bool " Maple 970FX Evaluation Board"
100 This option enables support for the Maple 970FX Evaluation Board.
101 For more informations, refer to <http://www.970eval.com>
112 depends on PPC_MULTIPLATFORM
117 depends on PPC_PSERIES
122 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
127 depends on PPC_PSERIES
136 # VMX is pSeries only for now until somebody writes the iSeries
137 # exception vectors for it
139 bool "Support for VMX (Altivec) vector unit"
140 depends on PPC_MULTIPLATFORM
144 depends on PPC_PSERIES
145 bool "Support for shared-processor logical partitions"
148 Enabling this option will make the kernel run more efficiently
149 on logically-partitioned pSeries systems which use shared
150 processors, that is, which share physical processors between
151 two or more partitions.
154 bool "kexec system call (EXPERIMENTAL)"
155 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
157 kexec is a system call that implements the ability to shutdown your
158 current kernel, and to start another kernel. It is like a reboot
159 but it is indepedent of the system firmware. And like a reboot
160 you can start any kernel with it, not just Linux.
162 The name comes from the similiarity to the exec system call.
164 It is an ongoing process to be certain the hardware in a machine
165 is properly shutdown, so do not be surprised if this code does not
166 initially work for you. It may help to enable device hotplugging
167 support. As of this writing the exact hardware interface is
168 strongly in flux, so no good recommendation can be made.
171 depends on PPC_PSERIES || PPC_ISERIES
177 depends on PPC_MULTIPLATFORM
180 config MPIC_BROKEN_U3
191 bool "Support for early boot text console"
194 Say Y here to see progress messages from the boot firmware in text
195 mode. Requires an Open Firmware compatible video card.
201 bool "Optimize for POWER4"
204 Cause the compiler to optimize for POWER4 processors. The resulting
205 binary will not work on POWER3 or RS64 processors when compiled with
206 binutils 2.15 or later.
209 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
210 depends on EXPERIMENTAL
213 Cause IO segments sent to a device for DMA to be merged virtually
214 by the IOMMU when they happen to have been allocated contiguously.
215 This doesn't add pressure to the IOMMU allocator. However, some
216 drivers don't support getting large merged segments coming back
217 from *_map_sg(). Say Y if you know the drivers you are using are
218 properly handling this case.
221 bool "Symmetric multi-processing support"
223 This enables support for systems with more than one CPU. If you have
224 a system with only one CPU, say N. If you have a system with more
227 If you say N here, the kernel will run on single and multiprocessor
228 machines, but will use only one CPU of a multiprocessor machine. If
229 you say Y here, the kernel will run on single-processor machines.
230 On a single-processor machine, the kernel will run faster if you say
233 If you don't know what to do here, say Y.
236 int "Maximum number of CPUs (2-128)"
242 bool "Hardware multithreading"
243 depends on SMP && PPC_PSERIES && BROKEN
245 This option enables hardware multithreading on RS64 cpus.
246 pSeries systems p620 and p660 have such a cpu type.
248 config ARCH_SELECT_MEMORY_MODEL
251 config ARCH_FLATMEM_ENABLE
255 config ARCH_DISCONTIGMEM_ENABLE
257 depends on SMP && PPC_PSERIES
259 config ARCH_DISCONTIGMEM_DEFAULT
261 depends on ARCH_DISCONTIGMEM_ENABLE
263 config ARCH_FLATMEM_ENABLE
266 config ARCH_SPARSEMEM_ENABLE
268 depends on ARCH_DISCONTIGMEM_ENABLE
272 config HAVE_ARCH_EARLY_PFN_TO_NID
274 depends on NEED_MULTIPLE_NODES
276 # Some NUMA nodes have memory ranges that span
277 # other nodes. Even though a pfn is valid and
278 # between a node's start and end pfns, it may not
279 # reside on that node.
281 # This is a relatively temporary hack that should
282 # be able to go away when sparsemem is fully in
284 config NODES_SPAN_OTHER_NODES
286 depends on NEED_MULTIPLE_NODES
290 default y if DISCONTIGMEM || SPARSEMEM
293 bool "SMT (Hyperthreading) scheduler support"
297 SMT scheduler support improves the CPU scheduler's decision making
298 when dealing with POWER5 cpus at a cost of slightly increased
299 overhead in some places. If unsure say N here.
301 source "kernel/Kconfig.preempt"
302 source kernel/Kconfig.hz
305 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
306 depends on PPC_PSERIES
307 default y if !EMBEDDED
310 # Use the generic interrupt handling code in kernel/irq/:
312 config GENERIC_HARDIRQS
318 depends on PPC_PSERIES || PPC_BPA
322 bool "Proc interface to RTAS"
327 tristate "Firmware flash interface"
331 tristate "Scanlog dump interface"
332 depends on RTAS_PROC && PPC_PSERIES
335 tristate "LPAR Configuration Data"
336 depends on PPC_PSERIES || PPC_ISERIES
338 Provide system capacity information via human readable
339 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
342 bool "Enable seccomp to safely compute untrusted bytecode"
346 This kernel feature is useful for number crunching applications
347 that may need to compute untrusted bytecode during their
348 execution. By using pipes or other transports made available to
349 the process as file descriptors supporting the read/write
350 syscalls, it's possible to isolate those applications in
351 their own address space using seccomp. Once seccomp is
352 enabled via /proc/<pid>/seccomp, it cannot be disabled
353 and the task is only allowed to execute a few safe syscalls
354 defined by each seccomp mode.
356 If unsure, say Y. Only embedded should say N here.
358 source "fs/Kconfig.binfmt"
361 bool "Support for hot-pluggable CPUs"
362 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
365 Say Y here to be able to turn CPUs off and on.
367 Say N if you are unsure.
369 config PROC_DEVICETREE
370 bool "Support for Open Firmware device tree in /proc"
372 This option adds a device-tree directory under /proc which contains
373 an image of the device tree that the kernel copies from Open
374 Firmware. If unsure, say Y here.
377 bool "Default bootloader kernel arguments"
378 depends on !PPC_ISERIES
381 string "Initial kernel command string"
382 depends on CMDLINE_BOOL
383 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
385 On some platforms, there is currently no way for the boot loader to
386 pass arguments to the kernel. For these platforms, you can supply
387 some command-line options at build time by entering them here. In
388 most cases you will need to specify the root device here.
401 Find out whether you have ISA slots on your motherboard. ISA is the
402 name of a bus system, i.e. the way the CPU talks to the other stuff
403 inside your box. If you have an Apple machine, say N here; if you
404 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
405 you have an embedded board, consult your board documentation.
417 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
420 Find out whether your system includes a PCI bus. PCI is the name of
421 a bus system, i.e. the way the CPU talks to the other stuff inside
422 your box. If you say Y here, the kernel will include drivers and
423 infrastructure code to support PCI bus devices.
429 source "drivers/pci/Kconfig"
431 source "drivers/pcmcia/Kconfig"
433 source "drivers/pci/hotplug/Kconfig"
439 source "drivers/Kconfig"
443 menu "iSeries device drivers"
444 depends on PPC_ISERIES
447 tristate "iSeries Virtual Console Support"
450 tristate "iSeries Virtual I/O disk support"
452 If you are running on an iSeries system and you want to use
453 virtual disks created and managed by OS/400, say Y.
456 tristate "iSeries Virtual I/O CD support"
458 If you are running Linux on an IBM iSeries system and you want to
459 read a CD drive owned by OS/400, say Y here.
462 tristate "iSeries Virtual Tape Support"
464 If you are running Linux on an iSeries system and you want Linux
465 to read and/or write a tape drive owned by OS/400, say Y here.
471 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
474 source "arch/powerpc/oprofile/Kconfig"
476 source "arch/ppc64/Kconfig.debug"
478 source "security/Kconfig"
482 depends on COMPAT && KEYS
485 source "crypto/Kconfig"