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.
204 bool "Optimize for POWER4"
207 Cause the compiler to optimize for POWER4 processors. The resulting
208 binary will not work on POWER3 or RS64 processors when compiled with
209 binutils 2.15 or later.
212 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
213 depends on EXPERIMENTAL
216 Cause IO segments sent to a device for DMA to be merged virtually
217 by the IOMMU when they happen to have been allocated contiguously.
218 This doesn't add pressure to the IOMMU allocator. However, some
219 drivers don't support getting large merged segments coming back
220 from *_map_sg(). Say Y if you know the drivers you are using are
221 properly handling this case.
224 bool "Symmetric multi-processing support"
226 This enables support for systems with more than one CPU. If you have
227 a system with only one CPU, say N. If you have a system with more
230 If you say N here, the kernel will run on single and multiprocessor
231 machines, but will use only one CPU of a multiprocessor machine. If
232 you say Y here, the kernel will run on single-processor machines.
233 On a single-processor machine, the kernel will run faster if you say
236 If you don't know what to do here, say Y.
239 int "Maximum number of CPUs (2-128)"
245 bool "Hardware multithreading"
246 depends on SMP && PPC_PSERIES && BROKEN
248 This option enables hardware multithreading on RS64 cpus.
249 pSeries systems p620 and p660 have such a cpu type.
253 default y if SMP && PPC_PSERIES
255 config ARCH_SELECT_MEMORY_MODEL
258 config ARCH_FLATMEM_ENABLE
262 config ARCH_DISCONTIGMEM_ENABLE
264 depends on SMP && PPC_PSERIES
266 config ARCH_DISCONTIGMEM_DEFAULT
268 depends on ARCH_DISCONTIGMEM_ENABLE
270 config ARCH_SPARSEMEM_ENABLE
272 depends on ARCH_DISCONTIGMEM_ENABLE
276 config HAVE_ARCH_EARLY_PFN_TO_NID
278 depends on NEED_MULTIPLE_NODES
280 # Some NUMA nodes have memory ranges that span
281 # other nodes. Even though a pfn is valid and
282 # between a node's start and end pfns, it may not
283 # reside on that node.
285 # This is a relatively temporary hack that should
286 # be able to go away when sparsemem is fully in
288 config NODES_SPAN_OTHER_NODES
290 depends on NEED_MULTIPLE_NODES
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
321 config RTAS_ERROR_LOGGING
327 bool "Proc interface to RTAS"
332 tristate "Firmware flash interface"
336 tristate "Scanlog dump interface"
337 depends on RTAS_PROC && PPC_PSERIES
340 tristate "LPAR Configuration Data"
341 depends on PPC_PSERIES || PPC_ISERIES
343 Provide system capacity information via human readable
344 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
347 bool "Enable seccomp to safely compute untrusted bytecode"
351 This kernel feature is useful for number crunching applications
352 that may need to compute untrusted bytecode during their
353 execution. By using pipes or other transports made available to
354 the process as file descriptors supporting the read/write
355 syscalls, it's possible to isolate those applications in
356 their own address space using seccomp. Once seccomp is
357 enabled via /proc/<pid>/seccomp, it cannot be disabled
358 and the task is only allowed to execute a few safe syscalls
359 defined by each seccomp mode.
361 If unsure, say Y. Only embedded should say N here.
363 source "fs/Kconfig.binfmt"
366 bool "Support for hot-pluggable CPUs"
367 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
370 Say Y here to be able to turn CPUs off and on.
372 Say N if you are unsure.
374 config PROC_DEVICETREE
375 bool "Support for Open Firmware device tree in /proc"
377 This option adds a device-tree directory under /proc which contains
378 an image of the device tree that the kernel copies from Open
379 Firmware. If unsure, say Y here.
382 bool "Default bootloader kernel arguments"
383 depends on !PPC_ISERIES
386 string "Initial kernel command string"
387 depends on CMDLINE_BOOL
388 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
390 On some platforms, there is currently no way for the boot loader to
391 pass arguments to the kernel. For these platforms, you can supply
392 some command-line options at build time by entering them here. In
393 most cases you will need to specify the root device here.
406 Find out whether you have ISA slots on your motherboard. ISA is the
407 name of a bus system, i.e. the way the CPU talks to the other stuff
408 inside your box. If you have an Apple machine, say N here; if you
409 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
410 you have an embedded board, consult your board documentation.
422 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
425 Find out whether your system includes a PCI bus. PCI is the name of
426 a bus system, i.e. the way the CPU talks to the other stuff inside
427 your box. If you say Y here, the kernel will include drivers and
428 infrastructure code to support PCI bus devices.
434 source "drivers/pci/Kconfig"
436 source "drivers/pcmcia/Kconfig"
438 source "drivers/pci/hotplug/Kconfig"
444 source "drivers/Kconfig"
448 menu "iSeries device drivers"
449 depends on PPC_ISERIES
452 tristate "iSeries Virtual Console Support"
455 tristate "iSeries Virtual I/O disk support"
457 If you are running on an iSeries system and you want to use
458 virtual disks created and managed by OS/400, say Y.
461 tristate "iSeries Virtual I/O CD support"
463 If you are running Linux on an IBM iSeries system and you want to
464 read a CD drive owned by OS/400, say Y here.
467 tristate "iSeries Virtual Tape Support"
469 If you are running Linux on an iSeries system and you want Linux
470 to read and/or write a tape drive owned by OS/400, say Y here.
476 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
479 source "arch/powerpc/oprofile/Kconfig"
481 source "arch/ppc64/Kconfig.debug"
483 source "security/Kconfig"
487 depends on COMPAT && KEYS
490 source "crypto/Kconfig"