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
39 config SCHED_NO_NO_OMIT_FRAME_POINTER
43 config ARCH_MAY_HAVE_PC_FDC
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 bool "kexec system call (EXPERIMENTAL)"
147 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
149 kexec is a system call that implements the ability to shutdown your
150 current kernel, and to start another kernel. It is like a reboot
151 but it is indepedent of the system firmware. And like a reboot
152 you can start any kernel with it, not just Linux.
154 The name comes from the similiarity to the exec system call.
156 It is an ongoing process to be certain the hardware in a machine
157 is properly shutdown, so do not be surprised if this code does not
158 initially work for you. It may help to enable device hotplugging
159 support. As of this writing the exact hardware interface is
160 strongly in flux, so no good recommendation can be made.
163 depends on PPC_PSERIES || PPC_ISERIES
169 depends on PPC_MULTIPLATFORM
172 config MPIC_BROKEN_U3
183 bool "Support for early boot text console"
186 Say Y here to see progress messages from the boot firmware in text
187 mode. Requires an Open Firmware compatible video card.
193 bool "Optimize for POWER4"
196 Cause the compiler to optimize for POWER4 processors. The resulting
197 binary will not work on POWER3 or RS64 processors when compiled with
198 binutils 2.15 or later.
201 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
202 depends on EXPERIMENTAL
205 Cause IO segments sent to a device for DMA to be merged virtually
206 by the IOMMU when they happen to have been allocated contiguously.
207 This doesn't add pressure to the IOMMU allocator. However, some
208 drivers don't support getting large merged segments coming back
209 from *_map_sg(). Say Y if you know the drivers you are using are
210 properly handling this case.
213 bool "Symmetric multi-processing support"
215 This enables support for systems with more than one CPU. If you have
216 a system with only one CPU, say N. If you have a system with more
219 If you say N here, the kernel will run on single and multiprocessor
220 machines, but will use only one CPU of a multiprocessor machine. If
221 you say Y here, the kernel will run on single-processor machines.
222 On a single-processor machine, the kernel will run faster if you say
225 If you don't know what to do here, say Y.
228 int "Maximum number of CPUs (2-128)"
234 bool "Hardware multithreading"
235 depends on SMP && PPC_PSERIES && BROKEN
237 This option enables hardware multithreading on RS64 cpus.
238 pSeries systems p620 and p660 have such a cpu type.
240 config ARCH_SELECT_MEMORY_MODEL
243 config ARCH_FLATMEM_ENABLE
247 config ARCH_DISCONTIGMEM_ENABLE
249 depends on SMP && PPC_PSERIES
251 config ARCH_DISCONTIGMEM_DEFAULT
253 depends on ARCH_DISCONTIGMEM_ENABLE
255 config ARCH_FLATMEM_ENABLE
258 config ARCH_SPARSEMEM_ENABLE
260 depends on ARCH_DISCONTIGMEM_ENABLE
264 config HAVE_ARCH_EARLY_PFN_TO_NID
266 depends on NEED_MULTIPLE_NODES
268 # Some NUMA nodes have memory ranges that span
269 # other nodes. Even though a pfn is valid and
270 # between a node's start and end pfns, it may not
271 # reside on that node.
273 # This is a relatively temporary hack that should
274 # be able to go away when sparsemem is fully in
276 config NODES_SPAN_OTHER_NODES
278 depends on NEED_MULTIPLE_NODES
282 default y if DISCONTIGMEM || SPARSEMEM
285 bool "SMT (Hyperthreading) scheduler support"
289 SMT scheduler support improves the CPU scheduler's decision making
290 when dealing with POWER5 cpus at a cost of slightly increased
291 overhead in some places. If unsure say N here.
293 source "kernel/Kconfig.preempt"
294 source kernel/Kconfig.hz
297 bool "PCI Extended Error Handling (EEH)" if EMBEDDED
298 depends on PPC_PSERIES
299 default y if !EMBEDDED
302 # Use the generic interrupt handling code in kernel/irq/:
304 config GENERIC_HARDIRQS
310 depends on PPC_PSERIES || PPC_BPA
314 bool "Proc interface to RTAS"
319 tristate "Firmware flash interface"
323 tristate "Scanlog dump interface"
324 depends on RTAS_PROC && PPC_PSERIES
327 tristate "LPAR Configuration Data"
328 depends on PPC_PSERIES || PPC_ISERIES
330 Provide system capacity information via human readable
331 <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
334 bool "Enable seccomp to safely compute untrusted bytecode"
338 This kernel feature is useful for number crunching applications
339 that may need to compute untrusted bytecode during their
340 execution. By using pipes or other transports made available to
341 the process as file descriptors supporting the read/write
342 syscalls, it's possible to isolate those applications in
343 their own address space using seccomp. Once seccomp is
344 enabled via /proc/<pid>/seccomp, it cannot be disabled
345 and the task is only allowed to execute a few safe syscalls
346 defined by each seccomp mode.
348 If unsure, say Y. Only embedded should say N here.
350 source "fs/Kconfig.binfmt"
353 bool "Support for hot-pluggable CPUs"
354 depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
357 Say Y here to be able to turn CPUs off and on.
359 Say N if you are unsure.
361 config PROC_DEVICETREE
362 bool "Support for Open Firmware device tree in /proc"
364 This option adds a device-tree directory under /proc which contains
365 an image of the device tree that the kernel copies from Open
366 Firmware. If unsure, say Y here.
369 bool "Default bootloader kernel arguments"
370 depends on !PPC_ISERIES
373 string "Initial kernel command string"
374 depends on CMDLINE_BOOL
375 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
377 On some platforms, there is currently no way for the boot loader to
378 pass arguments to the kernel. For these platforms, you can supply
379 some command-line options at build time by entering them here. In
380 most cases you will need to specify the root device here.
393 Find out whether you have ISA slots on your motherboard. ISA is the
394 name of a bus system, i.e. the way the CPU talks to the other stuff
395 inside your box. If you have an Apple machine, say N here; if you
396 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
397 you have an embedded board, consult your board documentation.
409 bool "support for PCI devices" if (EMBEDDED && PPC_ISERIES)
412 Find out whether your system includes a PCI bus. PCI is the name of
413 a bus system, i.e. the way the CPU talks to the other stuff inside
414 your box. If you say Y here, the kernel will include drivers and
415 infrastructure code to support PCI bus devices.
421 source "drivers/pci/Kconfig"
423 source "drivers/pcmcia/Kconfig"
425 source "drivers/pci/hotplug/Kconfig"
431 source "drivers/Kconfig"
435 menu "iSeries device drivers"
436 depends on PPC_ISERIES
439 tristate "iSeries Virtual Console Support"
442 tristate "iSeries Virtual I/O disk support"
444 If you are running on an iSeries system and you want to use
445 virtual disks created and managed by OS/400, say Y.
448 tristate "iSeries Virtual I/O CD support"
450 If you are running Linux on an IBM iSeries system and you want to
451 read a CD drive owned by OS/400, say Y here.
454 tristate "iSeries Virtual Tape Support"
456 If you are running Linux on an iSeries system and you want Linux
457 to read and/or write a tape drive owned by OS/400, say Y here.
463 depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
466 source "arch/powerpc/oprofile/Kconfig"
468 source "arch/ppc64/Kconfig.debug"
470 source "security/Kconfig"
474 depends on COMPAT && KEYS
477 source "crypto/Kconfig"