6 This option selects whether a 32-bit or a 64-bit kernel
9 menu "Processor support"
11 prompt "Processor Type"
14 There are five families of 32 bit PowerPC chips supported.
15 The most common ones are the desktop and server CPUs (601, 603,
16 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
17 embedded 512x/52xx/82xx/83xx/86xx counterparts.
18 The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
19 (85xx) each form a family of their own that is not compatible
22 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
25 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
36 select SYS_SUPPORTS_HUGETLBFS
46 bool "AMCC 44x, 46x or 47x"
59 prompt "Processor Type"
62 There are two families of 64 bit PowerPC chips supported.
63 The most common ones are the desktop and server CPUs
64 (POWER4, POWER5, 970, POWER5+, POWER6, POWER7, POWER8 ...)
66 The other are the "embedded" processors compliant with the
67 "Book 3E" variant of the architecture
70 bool "Server processors"
72 select PPC_HAVE_PMU_SUPPORT
73 select SYS_SUPPORTS_HUGETLBFS
74 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
75 select ARCH_SUPPORTS_NUMA_BALANCING
80 bool "Embedded processors"
81 select PPC_FPU # Make it a choice ?
82 select PPC_SMP_MUXED_IPI
88 prompt "CPU selection"
90 default POWER8_CPU if CPU_LITTLE_ENDIAN
93 This will create a kernel which is optimised for a particular CPU.
94 The resulting kernel may not run on other CPUs, so use this with care.
96 If unsure, select Generic.
100 depends on !CPU_LITTLE_ENDIAN
103 bool "Cell Broadband Engine"
104 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
108 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
112 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
116 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
120 depends on PPC_BOOK3S_64
121 select ARCH_HAS_FAST_MULTIPLIER
125 depends on PPC_BOOK3S_64
126 select ARCH_HAS_FAST_MULTIPLIER
129 bool "Freescale e5500"
133 bool "Freescale e6500"
140 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
144 depends on PPC_BOOK3E_64
148 depends on PPC32 && PPC_BOOK3S
149 select PPC_HAVE_PMU_SUPPORT
152 select FSL_EMB_PERFMON
153 select PPC_FSL_BOOK3E
157 bool "e500mc Support"
162 This must be enabled for running on e500mc (and derivatives
163 such as e5500/e6500), and must be disabled for running on
170 config PPC_8xx_PERF_EVENT
171 bool "PPC 8xx perf events"
172 depends on PPC_8xx && PERF_EVENTS
174 This is Performance Events support for PPC 8xx. The 8xx doesn't
175 have a PMU but some events are emulated using 8xx features.
177 config FSL_EMB_PERFMON
178 bool "Freescale Embedded Perfmon"
179 depends on E500 || PPC_83xx
181 This is the Performance Monitor support found on the e500 core
182 and some e300 cores (c3 and c4). Select this only if your
183 core supports the Embedded Performance Monitor APU
185 config FSL_EMB_PERF_EVENT
187 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
190 config FSL_EMB_PERF_EVENT_E500
192 depends on FSL_EMB_PERF_EVENT && E500
197 depends on 40x || 44x
202 depends on E200 || E500 || 44x || PPC_BOOK3E
207 depends on (E200 || E500) && PPC32
210 # this is for common code between PPC32 & PPC64 FSL BOOKE
211 config PPC_FSL_BOOK3E
213 select FSL_EMB_PERFMON
214 select PPC_SMP_MUXED_IPI
215 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
217 default y if FSL_BOOKE
221 depends on 44x || E500 || PPC_86xx
222 default y if PHYS_64BIT
225 bool 'Large physical address support' if E500 || PPC_86xx
226 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
228 This option enables kernel support for larger than 32-bit physical
229 addresses. This feature may not be available on all cores.
231 If you have more than 3.5GB of RAM or so, you also need to enable
232 SWIOTLB under Kernel Options for this to work. The actual number
233 is platform-dependent.
235 If in doubt, say N here.
238 bool "AltiVec Support"
239 depends on 6xx || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
241 This option enables kernel support for the Altivec extensions to the
242 PowerPC processor. The kernel currently supports saving and restoring
243 altivec registers, and turning on the 'altivec enable' bit so user
244 processes can execute altivec instructions.
246 This option is only usefully if you have a processor that supports
247 altivec (G4, otherwise known as 74xx series), but does not have
248 any affect on a non-altivec cpu (it does, however add code to the
251 If in doubt, say Y here.
255 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
258 This option enables kernel support for the Vector Scaler extensions
259 to the PowerPC processor. The kernel currently supports saving and
260 restoring VSX registers, and turning on the 'VSX enable' bit so user
261 processes can execute VSX instructions.
263 This option is only useful if you have a processor that supports
264 VSX (P7 and above), but does not have any affect on a non-VSX
265 CPUs (it does, however add code to the kernel).
267 If in doubt, say Y here.
271 depends on E200 || (E500 && !PPC_E500MC)
275 depends on SPE_POSSIBLE
278 This option enables kernel support for the Signal Processing
279 Extensions (SPE) to the PowerPC processor. The kernel currently
280 supports saving and restoring SPE registers, and turning on the
281 'spe enable' bit so user processes can execute SPE instructions.
283 This option is only useful if you have a processor that supports
284 SPE (e500, otherwise known as 85xx series), but does not have any
285 effect on a non-spe cpu (it does, however add code to the kernel).
287 If in doubt, say Y here.
291 depends on PPC_BOOK3S
293 config PPC_STD_MMU_32
295 depends on PPC_STD_MMU && PPC32
297 config PPC_STD_MMU_64
299 depends on PPC_STD_MMU && PPC64
302 bool "Radix MMU Support"
303 depends on PPC_BOOK3S_64
304 select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
307 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
308 is only implemented by IBM Power9 CPUs, if you don't have one of them
309 you can probably disable this.
311 config ARCH_ENABLE_HUGEPAGE_MIGRATION
313 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
316 config PPC_MMU_NOHASH
318 depends on !PPC_STD_MMU
320 config PPC_BOOK3E_MMU
322 depends on FSL_BOOKE || PPC_BOOK3E
326 default y if PPC_STD_MMU_64
329 config PPC_HAVE_PMU_SUPPORT
334 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
336 This enables the powerpc-specific perf_event back-end.
339 # Allow platforms to force SMP=y by selecting this
345 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
346 select GENERIC_IRQ_MIGRATION
347 bool "Symmetric multi-processing support" if !FORCE_SMP
349 This enables support for systems with more than one CPU. If you have
350 a system with only one CPU, say N. If you have a system with more
351 than one CPU, say Y. Note that the kernel does not currently
352 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
353 since they have inadequate hardware support for multiprocessor
356 If you say N here, the kernel will run on single and multiprocessor
357 machines, but will use only one CPU of a multiprocessor machine. If
358 you say Y here, the kernel will run on single-processor machines.
359 On a single-processor machine, the kernel will run faster if you say
362 If you don't know what to do here, say N.
365 int "Maximum number of CPUs (2-8192)"
368 default "32" if PPC64
371 config NOT_COHERENT_CACHE
373 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || GAMECUBE_COMMON
377 config CHECK_CACHE_COHERENCY
388 depends on PPC32 || CPU_BIG_ENDIAN
390 This symbol controls whether we build the 32-bit VDSO. We obviously
391 want to do that if we're building a 32-bit kernel. If we're building
392 a 64-bit kernel then we only want a 32-bit VDSO if we're building for
393 big endian. That is because the only little endian configuration we
394 support is ppc64le which is 64-bit only.
397 prompt "Endianness selection"
398 default CPU_BIG_ENDIAN
400 This option selects whether a big endian or little endian kernel will
403 config CPU_BIG_ENDIAN
404 bool "Build big endian kernel"
406 Build a big endian kernel.
408 If unsure, select this option.
410 config CPU_LITTLE_ENDIAN
411 bool "Build little endian kernel"
412 depends on PPC_BOOK3S_64
413 select PPC64_BOOT_WRAPPER
415 Build a little endian kernel.
417 Note that if cross compiling a little endian kernel,
418 CROSS_COMPILE must point to a toolchain capable of targeting
419 little endian powerpc.
423 config PPC64_BOOT_WRAPPER
425 depends on CPU_LITTLE_ENDIAN