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
43 config SCHED_NO_NO_OMIT_FRAME_POINTER
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
113 # VMX is pSeries only for now until somebody writes the iSeries
114 # exception vectors for it
116 bool "Support for VMX (Altivec) vector unit"
117 depends on PPC_MULTIPLATFORM
121 depends on PPC_PSERIES
122 bool "Support for shared-processor logical partitions"
125 Enabling this option will make the kernel run more efficiently
126 on logically-partitioned pSeries systems which use shared
127 processors, that is, which share physical processors between
128 two or more partitions.
131 depends on PPC_PSERIES || PPC_ISERIES
137 depends on PPC_MULTIPLATFORM
140 config MPIC_BROKEN_U3
151 bool "Support for early boot text console"
154 Say Y here to see progress messages from the boot firmware in text
155 mode. Requires an Open Firmware compatible video card.
158 bool "Optimize for POWER4"
161 Cause the compiler to optimize for POWER4 processors. The resulting
162 binary will not work on POWER3 or RS64 processors when compiled with
163 binutils 2.15 or later.
166 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
167 depends on EXPERIMENTAL
170 Cause IO segments sent to a device for DMA to be merged virtually
171 by the IOMMU when they happen to have been allocated contiguously.
172 This doesn't add pressure to the IOMMU allocator. However, some
173 drivers don't support getting large merged segments coming back
174 from *_map_sg(). Say Y if you know the drivers you are using are
175 properly handling this case.
178 bool "Symmetric multi-processing support"
180 This enables support for systems with more than one CPU. If you have
181 a system with only one CPU, say N. If you have a system with more
184 If you say N here, the kernel will run on single and multiprocessor
185 machines, but will use only one CPU of a multiprocessor machine. If
186 you say Y here, the kernel will run on single-processor machines.
187 On a single-processor machine, the kernel will run faster if you say
190 If you don't know what to do here, say Y.
193 int "Maximum number of CPUs (2-128)"
199 bool "Hardware multithreading"
200 depends on SMP && PPC_PSERIES && BROKEN
202 This option enables hardware multithreading on RS64 cpus.
203 pSeries systems p620 and p660 have such a cpu type.
206 bool "Discontiguous Memory Support"
207 depends on SMP && PPC_PSERIES
211 depends on DISCONTIGMEM
214 bool "SMT (Hyperthreading) scheduler support"
218 SMT scheduler support improves the CPU scheduler's decision making
219 when dealing with POWER5 cpus at a cost of slightly increased
220 overhead in some places. If unsure say N here.
223 bool "Preemptible Kernel"
225 This option reduces the latency of the kernel when reacting to
226 real-time or interactive events by allowing a low priority process to
227 be preempted even if it is in kernel mode executing a system call.
229 Say Y here if you are building a kernel for a desktop, embedded
230 or real-time system. Say N if you are unsure.
233 bool "Preempt The Big Kernel Lock"
237 This option reduces the latency of the kernel by making the
238 big kernel lock preemptible.
240 Say Y here if you are building a kernel for a desktop system.
241 Say N if you are unsure.
244 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
245 depends on PPC_PSERIES
246 default y if !EMBEDDED
249 # Use the generic interrupt handling code in kernel/irq/:
251 config GENERIC_HARDIRQS
257 depends on PPC_ISERIES
263 depends on PPC_PSERIES || PPC_BPA
267 bool "Proc interface to RTAS"
272 tristate "Firmware flash interface"
276 tristate "Scanlog dump interface"
277 depends on RTAS_PROC && PPC_PSERIES
280 tristate "LPAR Configuration Data"
281 depends on PPC_PSERIES || PPC_ISERIES
283 Provide system capacity information via human readable
284 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
287 bool "Enable seccomp to safely compute untrusted bytecode"
291 This kernel feature is useful for number crunching applications
292 that may need to compute untrusted bytecode during their
293 execution. By using pipes or other transports made available to
294 the process as file descriptors supporting the read/write
295 syscalls, it's possible to isolate those applications in
296 their own address space using seccomp. Once seccomp is
297 enabled via /proc/<pid>/seccomp, it cannot be disabled
298 and the task is only allowed to execute a few safe syscalls
299 defined by each seccomp mode.
301 If unsure, say Y. Only embedded should say N here.
314 Find out whether you have ISA slots on your motherboard. ISA is the
315 name of a bus system, i.e. the way the CPU talks to the other stuff
316 inside your box. If you have an Apple machine, say N here; if you
317 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
318 you have an embedded board, consult your board documentation.
330 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
333 Find out whether your system includes a PCI bus. PCI is the name of
334 a bus system, i.e. the way the CPU talks to the other stuff inside
335 your box. If you say Y here, the kernel will include drivers and
336 infrastructure code to support PCI bus devices.
342 source "fs/Kconfig.binfmt"
344 source "drivers/pci/Kconfig"
347 bool "Support for hot-pluggable CPUs"
348 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
351 Say Y here to be able to turn CPUs off and on.
353 Say N if you are unsure.
355 source "drivers/pcmcia/Kconfig"
357 source "drivers/pci/hotplug/Kconfig"
359 config PROC_DEVICETREE
360 bool "Support for Open Firmware device tree in /proc"
361 depends on !PPC_ISERIES
363 This option adds a device-tree directory under /proc which contains
364 an image of the device tree that the kernel copies from Open
365 Firmware. If unsure, say Y here.
368 bool "Default bootloader kernel arguments"
369 depends on !PPC_ISERIES
372 string "Initial kernel command string"
373 depends on CMDLINE_BOOL
374 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
376 On some platforms, there is currently no way for the boot loader to
377 pass arguments to the kernel. For these platforms, you can supply
378 some command-line options at build time by entering them here. In
379 most cases you will need to specify the root device here.
383 source "drivers/Kconfig"
387 menu "iSeries device drivers"
388 depends on PPC_ISERIES
391 tristate "iSeries Virtual Console Support"
394 tristate "iSeries Virtual I/O disk support"
396 If you are running on an iSeries system and you want to use
397 virtual disks created and managed by OS/400, say Y.
400 tristate "iSeries Virtual I/O CD support"
402 If you are running Linux on an IBM iSeries system and you want to
403 read a CD drive owned by OS/400, say Y here.
406 tristate "iSeries Virtual Tape Support"
408 If you are running Linux on an iSeries system and you want Linux
409 to read and/or write a tape drive owned by OS/400, say Y here.
415 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
418 source "arch/ppc64/oprofile/Kconfig"
420 source "arch/ppc64/Kconfig.debug"
422 source "security/Kconfig"
426 depends on COMPAT && KEYS
429 source "crypto/Kconfig"