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
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 depends on PPC_PSERIES || PPC_ISERIES
152 depends on PPC_MULTIPLATFORM
155 config MPIC_BROKEN_U3
166 bool "Support for early boot text console"
169 Say Y here to see progress messages from the boot firmware in text
170 mode. Requires an Open Firmware compatible video card.
173 bool "Optimize for POWER4"
176 Cause the compiler to optimize for POWER4 processors. The resulting
177 binary will not work on POWER3 or RS64 processors when compiled with
178 binutils 2.15 or later.
181 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
182 depends on EXPERIMENTAL
185 Cause IO segments sent to a device for DMA to be merged virtually
186 by the IOMMU when they happen to have been allocated contiguously.
187 This doesn't add pressure to the IOMMU allocator. However, some
188 drivers don't support getting large merged segments coming back
189 from *_map_sg(). Say Y if you know the drivers you are using are
190 properly handling this case.
193 bool "Symmetric multi-processing support"
195 This enables support for systems with more than one CPU. If you have
196 a system with only one CPU, say N. If you have a system with more
199 If you say N here, the kernel will run on single and multiprocessor
200 machines, but will use only one CPU of a multiprocessor machine. If
201 you say Y here, the kernel will run on single-processor machines.
202 On a single-processor machine, the kernel will run faster if you say
205 If you don't know what to do here, say Y.
208 int "Maximum number of CPUs (2-128)"
214 bool "Hardware multithreading"
215 depends on SMP && PPC_PSERIES && BROKEN
217 This option enables hardware multithreading on RS64 cpus.
218 pSeries systems p620 and p660 have such a cpu type.
221 bool "Discontiguous Memory Support"
222 depends on SMP && PPC_PSERIES
226 depends on DISCONTIGMEM
229 bool "SMT (Hyperthreading) scheduler support"
233 SMT scheduler support improves the CPU scheduler's decision making
234 when dealing with POWER5 cpus at a cost of slightly increased
235 overhead in some places. If unsure say N here.
238 bool "Preemptible Kernel"
240 This option reduces the latency of the kernel when reacting to
241 real-time or interactive events by allowing a low priority process to
242 be preempted even if it is in kernel mode executing a system call.
244 Say Y here if you are building a kernel for a desktop, embedded
245 or real-time system. Say N if you are unsure.
248 bool "Preempt The Big Kernel Lock"
252 This option reduces the latency of the kernel by making the
253 big kernel lock preemptible.
255 Say Y here if you are building a kernel for a desktop system.
256 Say N if you are unsure.
259 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
260 depends on PPC_PSERIES
261 default y if !EMBEDDED
264 # Use the generic interrupt handling code in kernel/irq/:
266 config GENERIC_HARDIRQS
272 depends on PPC_ISERIES
278 depends on PPC_PSERIES || PPC_BPA
282 bool "Proc interface to RTAS"
287 tristate "Firmware flash interface"
291 tristate "Scanlog dump interface"
292 depends on RTAS_PROC && PPC_PSERIES
295 tristate "LPAR Configuration Data"
296 depends on PPC_PSERIES || PPC_ISERIES
298 Provide system capacity information via human readable
299 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
302 bool "Enable seccomp to safely compute untrusted bytecode"
306 This kernel feature is useful for number crunching applications
307 that may need to compute untrusted bytecode during their
308 execution. By using pipes or other transports made available to
309 the process as file descriptors supporting the read/write
310 syscalls, it's possible to isolate those applications in
311 their own address space using seccomp. Once seccomp is
312 enabled via /proc/<pid>/seccomp, it cannot be disabled
313 and the task is only allowed to execute a few safe syscalls
314 defined by each seccomp mode.
316 If unsure, say Y. Only embedded should say N here.
329 Find out whether you have ISA slots on your motherboard. ISA is the
330 name of a bus system, i.e. the way the CPU talks to the other stuff
331 inside your box. If you have an Apple machine, say N here; if you
332 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
333 you have an embedded board, consult your board documentation.
345 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
348 Find out whether your system includes a PCI bus. PCI is the name of
349 a bus system, i.e. the way the CPU talks to the other stuff inside
350 your box. If you say Y here, the kernel will include drivers and
351 infrastructure code to support PCI bus devices.
357 source "fs/Kconfig.binfmt"
359 source "drivers/pci/Kconfig"
362 bool "Support for hot-pluggable CPUs"
363 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
366 Say Y here to be able to turn CPUs off and on.
368 Say N if you are unsure.
370 source "drivers/pcmcia/Kconfig"
372 source "drivers/pci/hotplug/Kconfig"
374 config PROC_DEVICETREE
375 bool "Support for Open Firmware device tree in /proc"
376 depends on !PPC_ISERIES
378 This option adds a device-tree directory under /proc which contains
379 an image of the device tree that the kernel copies from Open
380 Firmware. If unsure, say Y here.
383 bool "Default bootloader kernel arguments"
384 depends on !PPC_ISERIES
387 string "Initial kernel command string"
388 depends on CMDLINE_BOOL
389 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
391 On some platforms, there is currently no way for the boot loader to
392 pass arguments to the kernel. For these platforms, you can supply
393 some command-line options at build time by entering them here. In
394 most cases you will need to specify the root device here.
398 source "drivers/Kconfig"
402 menu "iSeries device drivers"
403 depends on PPC_ISERIES
406 tristate "iSeries Virtual Console Support"
409 tristate "iSeries Virtual I/O disk support"
411 If you are running on an iSeries system and you want to use
412 virtual disks created and managed by OS/400, say Y.
415 tristate "iSeries Virtual I/O CD support"
417 If you are running Linux on an IBM iSeries system and you want to
418 read a CD drive owned by OS/400, say Y here.
421 tristate "iSeries Virtual Tape Support"
423 If you are running Linux on an iSeries system and you want Linux
424 to read and/or write a tape drive owned by OS/400, say Y here.
430 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
433 source "arch/ppc64/oprofile/Kconfig"
435 source "arch/ppc64/Kconfig.debug"
437 source "security/Kconfig"
441 depends on COMPAT && KEYS
444 source "crypto/Kconfig"