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
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 depends on PPC_MULTIPLATFORM
82 bool " Apple G5 based machines"
88 depends on PPC_MULTIPLATFORM
89 bool " Maple 970FX Evaluation Board"
94 This option enables support for the Maple 970FX Evaluation Board.
95 For more informations, refer to <http://www.970eval.com>
106 depends on PPC_MULTIPLATFORM
110 # VMX is pSeries only for now until somebody writes the iSeries
111 # exception vectors for it
113 bool "Support for VMX (Altivec) vector unit"
114 depends on PPC_MULTIPLATFORM
118 depends on PPC_PSERIES
119 bool "Support for shared-processor logical partitions"
122 Enabling this option will make the kernel run more efficiently
123 on logically-partitioned pSeries systems which use shared
124 processors, that is, which share physical processors between
125 two or more partitions.
128 depends on PPC_PSERIES || PPC_ISERIES
134 depends on PPC_MULTIPLATFORM
137 config MPIC_BROKEN_U3
148 bool "Support for early boot text console"
151 Say Y here to see progress messages from the boot firmware in text
152 mode. Requires an Open Firmware compatible video card.
155 bool "Optimize for POWER4"
158 Cause the compiler to optimize for POWER4 processors. The resulting
159 binary will not work on POWER3 or RS64 processors when compiled with
160 binutils 2.15 or later.
163 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
164 depends on EXPERIMENTAL
167 Cause IO segments sent to a device for DMA to be merged virtually
168 by the IOMMU when they happen to have been allocated contiguously.
169 This doesn't add pressure to the IOMMU allocator. However, some
170 drivers don't support getting large merged segments coming back
171 from *_map_sg(). Say Y if you know the drivers you are using are
172 properly handling this case.
175 bool "Symmetric multi-processing support"
177 This enables support for systems with more than one CPU. If you have
178 a system with only one CPU, say N. If you have a system with more
181 If you say N here, the kernel will run on single and multiprocessor
182 machines, but will use only one CPU of a multiprocessor machine. If
183 you say Y here, the kernel will run on single-processor machines.
184 On a single-processor machine, the kernel will run faster if you say
187 If you don't know what to do here, say Y.
190 int "Maximum number of CPUs (2-128)"
196 bool "Hardware multithreading"
197 depends on SMP && PPC_PSERIES
200 bool "Discontiguous Memory Support"
201 depends on SMP && PPC_PSERIES
205 depends on DISCONTIGMEM
208 bool "SMT (Hyperthreading) scheduler support"
212 SMT scheduler support improves the CPU scheduler's decision making
213 when dealing with POWER5 cpus at a cost of slightly increased
214 overhead in some places. If unsure say N here.
217 bool "Preemptible Kernel"
219 This option reduces the latency of the kernel when reacting to
220 real-time or interactive events by allowing a low priority process to
221 be preempted even if it is in kernel mode executing a system call.
223 Say Y here if you are building a kernel for a desktop, embedded
224 or real-time system. Say N if you are unsure.
227 bool "Preempt The Big Kernel Lock"
231 This option reduces the latency of the kernel by making the
232 big kernel lock preemptible.
234 Say Y here if you are building a kernel for a desktop system.
235 Say N if you are unsure.
238 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
239 depends on PPC_PSERIES
240 default y if !EMBEDDED
243 # Use the generic interrupt handling code in kernel/irq/:
245 config GENERIC_HARDIRQS
251 depends on PPC_ISERIES
256 bool "Proc interface to RTAS"
257 depends on PPC_PSERIES
260 tristate "Firmware flash interface"
264 tristate "Scanlog dump interface"
268 tristate "LPAR Configuration Data"
269 depends on PPC_PSERIES || PPC_ISERIES
271 Provide system capacity information via human readable
272 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
282 Find out whether you have ISA slots on your motherboard. ISA is the
283 name of a bus system, i.e. the way the CPU talks to the other stuff
284 inside your box. If you have an Apple machine, say N here; if you
285 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
286 you have an embedded board, consult your board documentation.
301 Find out whether your system includes a PCI bus. PCI is the name of
302 a bus system, i.e. the way the CPU talks to the other stuff inside
303 your box. If you say Y here, the kernel will include drivers and
304 infrastructure code to support PCI bus devices.
310 source "fs/Kconfig.binfmt"
312 source "drivers/pci/Kconfig"
315 bool "Support for hot-pluggable CPUs"
316 depends on SMP && EXPERIMENTAL && PPC_PSERIES
319 Say Y here to be able to turn CPUs off and on.
321 Say N if you are unsure.
323 source "drivers/pcmcia/Kconfig"
325 source "drivers/pci/hotplug/Kconfig"
327 config PROC_DEVICETREE
328 bool "Support for Open Firmware device tree in /proc"
329 depends on !PPC_ISERIES
331 This option adds a device-tree directory under /proc which contains
332 an image of the device tree that the kernel copies from Open
333 Firmware. If unsure, say Y here.
336 bool "Default bootloader kernel arguments"
337 depends on !PPC_ISERIES
340 string "Initial kernel command string"
341 depends on CMDLINE_BOOL
342 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
344 On some platforms, there is currently no way for the boot loader to
345 pass arguments to the kernel. For these platforms, you can supply
346 some command-line options at build time by entering them here. In
347 most cases you will need to specify the root device here.
351 source "drivers/Kconfig"
355 menu "iSeries device drivers"
356 depends on PPC_ISERIES
359 tristate "iSeries Virtual Console Support"
362 tristate "iSeries Virtual I/O disk support"
364 If you are running on an iSeries system and you want to use
365 virtual disks created and managed by OS/400, say Y.
368 tristate "iSeries Virtual I/O CD support"
370 If you are running Linux on an IBM iSeries system and you want to
371 read a CD drive owned by OS/400, say Y here.
374 tristate "iSeries Virtual Tape Support"
376 If you are running Linux on an iSeries system and you want Linux
377 to read and/or write a tape drive owned by OS/400, say Y here.
383 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
386 source "arch/ppc64/oprofile/Kconfig"
388 source "arch/ppc64/Kconfig.debug"
390 source "kernel/vserver/Kconfig"
392 source "security/Kconfig"
396 depends on COMPAT && KEYS
399 source "crypto/Kconfig"