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
39 config SCHED_NO_NO_OMIT_FRAME_POINTER
43 config ARCH_MAY_HAVE_PC_FDC
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 bool "kexec system call (EXPERIMENTAL)"
147 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
149 kexec is a system call that implements the ability to shutdown your
150 current kernel, and to start another kernel. It is like a reboot
151 but it is indepedent of the system firmware. And like a reboot
152 you can start any kernel with it, not just Linux.
154 The name comes from the similiarity to the exec system call.
156 It is an ongoing process to be certain the hardware in a machine
157 is properly shutdown, so do not be surprised if this code does not
158 initially work for you. It may help to enable device hotplugging
159 support. As of this writing the exact hardware interface is
160 strongly in flux, so no good recommendation can be made.
163 depends on PPC_PSERIES || PPC_ISERIES
169 depends on PPC_MULTIPLATFORM
172 config MPIC_BROKEN_U3
183 bool "Support for early boot text console"
186 Say Y here to see progress messages from the boot firmware in text
187 mode. Requires an Open Firmware compatible video card.
190 bool "Optimize for POWER4"
193 Cause the compiler to optimize for POWER4 processors. The resulting
194 binary will not work on POWER3 or RS64 processors when compiled with
195 binutils 2.15 or later.
198 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
199 depends on EXPERIMENTAL
202 Cause IO segments sent to a device for DMA to be merged virtually
203 by the IOMMU when they happen to have been allocated contiguously.
204 This doesn't add pressure to the IOMMU allocator. However, some
205 drivers don't support getting large merged segments coming back
206 from *_map_sg(). Say Y if you know the drivers you are using are
207 properly handling this case.
210 bool "Symmetric multi-processing support"
212 This enables support for systems with more than one CPU. If you have
213 a system with only one CPU, say N. If you have a system with more
216 If you say N here, the kernel will run on single and multiprocessor
217 machines, but will use only one CPU of a multiprocessor machine. If
218 you say Y here, the kernel will run on single-processor machines.
219 On a single-processor machine, the kernel will run faster if you say
222 If you don't know what to do here, say Y.
225 int "Maximum number of CPUs (2-128)"
231 bool "Hardware multithreading"
232 depends on SMP && PPC_PSERIES && BROKEN
234 This option enables hardware multithreading on RS64 cpus.
235 pSeries systems p620 and p660 have such a cpu type.
237 config ARCH_SELECT_MEMORY_MODEL
240 config ARCH_FLATMEM_ENABLE
244 config ARCH_DISCONTIGMEM_ENABLE
246 depends on SMP && PPC_PSERIES
248 config ARCH_DISCONTIGMEM_DEFAULT
250 depends on ARCH_DISCONTIGMEM_ENABLE
252 config ARCH_FLATMEM_ENABLE
255 config ARCH_SPARSEMEM_ENABLE
257 depends on ARCH_DISCONTIGMEM_ENABLE
261 config HAVE_ARCH_EARLY_PFN_TO_NID
263 depends on NEED_MULTIPLE_NODES
265 # Some NUMA nodes have memory ranges that span
266 # other nodes. Even though a pfn is valid and
267 # between a node's start and end pfns, it may not
268 # reside on that node.
270 # This is a relatively temporary hack that should
271 # be able to go away when sparsemem is fully in
273 config NODES_SPAN_OTHER_NODES
275 depends on NEED_MULTIPLE_NODES
279 default y if DISCONTIGMEM || SPARSEMEM
282 bool "SMT (Hyperthreading) scheduler support"
286 SMT scheduler support improves the CPU scheduler's decision making
287 when dealing with POWER5 cpus at a cost of slightly increased
288 overhead in some places. If unsure say N here.
290 source "kernel/Kconfig.preempt"
291 source kernel/Kconfig.hz
294 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
295 depends on PPC_PSERIES
296 default y if !EMBEDDED
299 # Use the generic interrupt handling code in kernel/irq/:
301 config GENERIC_HARDIRQS
307 depends on PPC_PSERIES || PPC_BPA
311 bool "Proc interface to RTAS"
316 tristate "Firmware flash interface"
320 tristate "Scanlog dump interface"
321 depends on RTAS_PROC && PPC_PSERIES
324 tristate "LPAR Configuration Data"
325 depends on PPC_PSERIES || PPC_ISERIES
327 Provide system capacity information via human readable
328 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
331 bool "Enable seccomp to safely compute untrusted bytecode"
335 This kernel feature is useful for number crunching applications
336 that may need to compute untrusted bytecode during their
337 execution. By using pipes or other transports made available to
338 the process as file descriptors supporting the read/write
339 syscalls, it's possible to isolate those applications in
340 their own address space using seccomp. Once seccomp is
341 enabled via /proc/<pid>/seccomp, it cannot be disabled
342 and the task is only allowed to execute a few safe syscalls
343 defined by each seccomp mode.
345 If unsure, say Y. Only embedded should say N here.
347 source "fs/Kconfig.binfmt"
350 bool "Support for hot-pluggable CPUs"
351 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
354 Say Y here to be able to turn CPUs off and on.
356 Say N if you are unsure.
358 config PROC_DEVICETREE
359 bool "Support for Open Firmware device tree in /proc"
360 depends on !PPC_ISERIES
362 This option adds a device-tree directory under /proc which contains
363 an image of the device tree that the kernel copies from Open
364 Firmware. If unsure, say Y here.
367 bool "Default bootloader kernel arguments"
368 depends on !PPC_ISERIES
371 string "Initial kernel command string"
372 depends on CMDLINE_BOOL
373 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
375 On some platforms, there is currently no way for the boot loader to
376 pass arguments to the kernel. For these platforms, you can supply
377 some command-line options at build time by entering them here. In
378 most cases you will need to specify the root device here.
391 Find out whether you have ISA slots on your motherboard. ISA is the
392 name of a bus system, i.e. the way the CPU talks to the other stuff
393 inside your box. If you have an Apple machine, say N here; if you
394 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
395 you have an embedded board, consult your board documentation.
407 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
410 Find out whether your system includes a PCI bus. PCI is the name of
411 a bus system, i.e. the way the CPU talks to the other stuff inside
412 your box. If you say Y here, the kernel will include drivers and
413 infrastructure code to support PCI bus devices.
419 source "drivers/pci/Kconfig"
421 source "drivers/pcmcia/Kconfig"
423 source "drivers/pci/hotplug/Kconfig"
429 source "drivers/Kconfig"
433 menu "iSeries device drivers"
434 depends on PPC_ISERIES
437 tristate "iSeries Virtual Console Support"
440 tristate "iSeries Virtual I/O disk support"
442 If you are running on an iSeries system and you want to use
443 virtual disks created and managed by OS/400, say Y.
446 tristate "iSeries Virtual I/O CD support"
448 If you are running Linux on an IBM iSeries system and you want to
449 read a CD drive owned by OS/400, say Y here.
452 tristate "iSeries Virtual Tape Support"
454 If you are running Linux on an iSeries system and you want Linux
455 to read and/or write a tape drive owned by OS/400, say Y here.
461 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
464 source "arch/powerpc/oprofile/Kconfig"
466 source "arch/ppc64/Kconfig.debug"
468 source "security/Kconfig"
472 depends on COMPAT && KEYS
475 source "crypto/Kconfig"