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_ISA_DMA
43 # We optimistically allocate largepages from the VM, so make the limit
44 # large enough (16MB). This badly named config option is actually
46 config FORCE_MAX_ZONEORDER
54 depends on COMPAT && SYSVIPC
57 menu "Platform support"
60 prompt "Platform Type"
61 default PPC_MULTIPLATFORM
64 bool "IBM Legacy iSeries"
66 config PPC_MULTIPLATFORM
72 depends on PPC_MULTIPLATFORM
73 bool " IBM pSeries & new iSeries"
77 depends on PPC_MULTIPLATFORM
78 bool " Apple G5 based machines"
84 depends on PPC_MULTIPLATFORM
85 bool " Maple 970FX Evaluation Board"
90 This option enables support for the Maple 970FX Evaluation Board.
91 For more informations, refer to http://www.970eval.com
102 depends on PPC_MULTIPLATFORM
106 # VMX is pSeries only for now until somebody writes the iSeries
107 # exception vectors for it
109 bool "Support for VMX (Altivec) vector unit"
110 depends on PPC_MULTIPLATFORM
114 depends on PPC_PSERIES
115 bool "Support for shared-processor logical partitions"
118 Enabling this option will make the kernel run more efficiently
119 on logically-partitioned pSeries systems which use shared
120 processors, that is, which share physical processors between
121 two or more partitions.
124 depends on PPC_PSERIES || PPC_ISERIES
130 depends on PPC_MULTIPLATFORM
133 config MPIC_BROKEN_U3
144 bool "Support for early boot text console"
147 Say Y here to see progress messages from the boot firmware in text
148 mode. Requires an Open Firmware compatible video card.
151 bool "Optimize for POWER4"
154 Cause the compiler to optimize for POWER4 processors. The resulting
155 binary will not work on POWER3 or RS64 processors when compiled with
156 binutils 2.15 or later.
159 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
160 depends on EXPERIMENTAL
163 Cause IO segments sent to a device for DMA to be merged virtually
164 by the IOMMU when they happen to have been allocated contiguously.
165 This doesn't add pressure to the IOMMU allocator. However, some
166 drivers don't support getting large merged segments coming back
167 from *_map_sg(). Say Y if you know the drivers you are using are
168 properly handling this case.
171 bool "Symmetric multi-processing support"
173 This enables support for systems with more than one CPU. If you have
174 a system with only one CPU, say N. If you have a system with more
177 If you say N here, the kernel will run on single and multiprocessor
178 machines, but will use only one CPU of a multiprocessor machine. If
179 you say Y here, the kernel will run on single-processor machines.
180 On a single-processor machine, the kernel will run faster if you say
183 If you don't know what to do here, say Y.
186 bool "Distribute interrupts on all CPUs by default"
187 depends on SMP && PPC_MULTIPLATFORM
189 This option gives the kernel permission to distribute IRQs across
190 multiple CPUs. Saying N here will route all IRQs to the first
194 int "Maximum number of CPUs (2-128)"
200 bool "Hardware multithreading"
201 depends on SMP && PPC_PSERIES
204 bool "Discontiguous Memory Support"
205 depends on SMP && PPC_PSERIES
209 depends on DISCONTIGMEM
212 bool "SMT (Hyperthreading) scheduler support"
216 SMT scheduler support improves the CPU scheduler's decision making
217 when dealing with POWER5 cpus at a cost of slightly increased
218 overhead in some places. If unsure say N here.
221 bool "Preemptible Kernel"
223 This option reduces the latency of the kernel when reacting to
224 real-time or interactive events by allowing a low priority process to
225 be preempted even if it is in kernel mode executing a system call.
227 Say Y here if you are building a kernel for a desktop, embedded
228 or real-time system. Say N if you are unsure.
231 # Use the generic interrupt handling code in kernel/irq/:
233 config GENERIC_HARDIRQS
239 depends on PPC_ISERIES
244 bool "Proc interface to RTAS"
245 depends on PPC_PSERIES
248 tristate "Firmware flash interface"
252 tristate "Scanlog dump interface"
256 tristate "LPAR Configuration Data"
257 depends on PPC_PSERIES || PPC_ISERIES
259 Provide system capacity information via human readable
260 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
270 Find out whether you have ISA slots on your motherboard. ISA is the
271 name of a bus system, i.e. the way the CPU talks to the other stuff
272 inside your box. If you have an Apple machine, say N here; if you
273 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
274 you have an embedded board, consult your board documentation.
289 Find out whether your system includes a PCI bus. PCI is the name of
290 a bus system, i.e. the way the CPU talks to the other stuff inside
291 your box. If you say Y here, the kernel will include drivers and
292 infrastructure code to support PCI bus devices.
298 source "fs/Kconfig.binfmt"
300 source "drivers/pci/Kconfig"
303 bool "Support for hot-pluggable CPUs"
304 depends on SMP && HOTPLUG && EXPERIMENTAL && PPC_PSERIES
306 Say Y here to be able to turn CPUs off and on.
308 Say N if you are unsure.
310 source "drivers/pcmcia/Kconfig"
312 source "drivers/pci/hotplug/Kconfig"
314 config PROC_DEVICETREE
315 bool "Support for Open Firmware device tree in /proc"
316 depends on !PPC_ISERIES
318 This option adds a device-tree directory under /proc which contains
319 an image of the device tree that the kernel copies from Open
320 Firmware. If unsure, say Y here.
323 bool "Default bootloader kernel arguments"
324 depends on !PPC_ISERIES
327 string "Initial kernel command string"
328 depends on CMDLINE_BOOL
329 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
331 On some platforms, there is currently no way for the boot loader to
332 pass arguments to the kernel. For these platforms, you can supply
333 some command-line options at build time by entering them here. In
334 most cases you will need to specify the root device here.
338 source "drivers/Kconfig"
342 menu "iSeries device drivers"
343 depends on PPC_ISERIES
346 tristate "iSeries Virtual Console Support"
349 tristate "iSeries Virtual I/O disk support"
351 If you are running on an iSeries system and you want to use
352 virtual disks created and managed by OS/400, say Y.
355 tristate "iSeries Virtual I/O CD support"
357 If you are running Linux on an IBM iSeries system and you want to
358 read a CD drive owned by OS/400, say Y here.
361 tristate "iSeries Virtual Tape Support"
363 If you are running Linux on an iSeries system and you want Linux
364 to read and/or write a tape drive owned by OS/400, say Y here.
370 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
373 source "arch/ppc64/oprofile/Kconfig"
375 source "arch/ppc64/Kconfig.debug"
377 source "kernel/vserver/Kconfig"
379 source "security/Kconfig"
383 depends on COMPAT && KEYS
386 source "crypto/Kconfig"