1 # SPDX-License-Identifier: GPL-2.0
7 This option selects whether a 32-bit or a 64-bit kernel
10 menu "Processor support"
12 prompt "Processor Type"
15 There are five families of 32 bit PowerPC chips supported.
16 The most common ones are the desktop and server CPUs (601, 603,
17 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
18 embedded 512x/52xx/82xx/83xx/86xx counterparts.
19 The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
20 (85xx) each form a family of their own that is not compatible
23 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
26 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
37 select SYS_SUPPORTS_HUGETLBFS
47 bool "AMCC 44x, 46x or 47x"
60 prompt "Processor Type"
63 There are two families of 64 bit PowerPC chips supported.
64 The most common ones are the desktop and server CPUs
65 (POWER4, POWER5, 970, POWER5+, POWER6, POWER7, POWER8 ...)
67 The other are the "embedded" processors compliant with the
68 "Book 3E" variant of the architecture
71 bool "Server processors"
73 select PPC_HAVE_PMU_SUPPORT
74 select SYS_SUPPORTS_HUGETLBFS
75 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
76 select ARCH_SUPPORTS_NUMA_BALANCING
81 bool "Embedded processors"
82 select PPC_FPU # Make it a choice ?
83 select PPC_SMP_MUXED_IPI
89 prompt "CPU selection"
91 default POWER8_CPU if CPU_LITTLE_ENDIAN
94 This will create a kernel which is optimised for a particular CPU.
95 The resulting kernel may not run on other CPUs, so use this with care.
97 If unsure, select Generic.
101 depends on !CPU_LITTLE_ENDIAN
104 bool "Cell Broadband Engine"
105 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
109 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
113 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
117 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
121 depends on PPC_BOOK3S_64
122 select ARCH_HAS_FAST_MULTIPLIER
126 depends on PPC_BOOK3S_64
127 select ARCH_HAS_FAST_MULTIPLIER
130 bool "Freescale e5500"
134 bool "Freescale e6500"
141 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
145 depends on PPC_BOOK3E_64
149 depends on PPC32 && PPC_BOOK3S
150 select PPC_HAVE_PMU_SUPPORT
153 select FSL_EMB_PERFMON
154 select PPC_FSL_BOOK3E
158 bool "e500mc Support"
163 This must be enabled for running on e500mc (and derivatives
164 such as e5500/e6500), and must be disabled for running on
171 config PPC_8xx_PERF_EVENT
172 bool "PPC 8xx perf events"
173 depends on PPC_8xx && PERF_EVENTS
175 This is Performance Events support for PPC 8xx. The 8xx doesn't
176 have a PMU but some events are emulated using 8xx features.
178 config FSL_EMB_PERFMON
179 bool "Freescale Embedded Perfmon"
180 depends on E500 || PPC_83xx
182 This is the Performance Monitor support found on the e500 core
183 and some e300 cores (c3 and c4). Select this only if your
184 core supports the Embedded Performance Monitor APU
186 config FSL_EMB_PERF_EVENT
188 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
191 config FSL_EMB_PERF_EVENT_E500
193 depends on FSL_EMB_PERF_EVENT && E500
198 depends on 40x || 44x
203 depends on E200 || E500 || 44x || PPC_BOOK3E
208 depends on (E200 || E500) && PPC32
211 # this is for common code between PPC32 & PPC64 FSL BOOKE
212 config PPC_FSL_BOOK3E
214 select FSL_EMB_PERFMON
215 select PPC_SMP_MUXED_IPI
216 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
218 default y if FSL_BOOKE
222 depends on 44x || E500 || PPC_86xx
223 default y if PHYS_64BIT
226 bool 'Large physical address support' if E500 || PPC_86xx
227 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
229 This option enables kernel support for larger than 32-bit physical
230 addresses. This feature may not be available on all cores.
232 If you have more than 3.5GB of RAM or so, you also need to enable
233 SWIOTLB under Kernel Options for this to work. The actual number
234 is platform-dependent.
236 If in doubt, say N here.
239 bool "AltiVec Support"
240 depends on 6xx || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
242 This option enables kernel support for the Altivec extensions to the
243 PowerPC processor. The kernel currently supports saving and restoring
244 altivec registers, and turning on the 'altivec enable' bit so user
245 processes can execute altivec instructions.
247 This option is only usefully if you have a processor that supports
248 altivec (G4, otherwise known as 74xx series), but does not have
249 any affect on a non-altivec cpu (it does, however add code to the
252 If in doubt, say Y here.
256 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
259 This option enables kernel support for the Vector Scaler extensions
260 to the PowerPC processor. The kernel currently supports saving and
261 restoring VSX registers, and turning on the 'VSX enable' bit so user
262 processes can execute VSX instructions.
264 This option is only useful if you have a processor that supports
265 VSX (P7 and above), but does not have any affect on a non-VSX
266 CPUs (it does, however add code to the kernel).
268 If in doubt, say Y here.
272 depends on E200 || (E500 && !PPC_E500MC)
276 depends on SPE_POSSIBLE
279 This option enables kernel support for the Signal Processing
280 Extensions (SPE) to the PowerPC processor. The kernel currently
281 supports saving and restoring SPE registers, and turning on the
282 'spe enable' bit so user processes can execute SPE instructions.
284 This option is only useful if you have a processor that supports
285 SPE (e500, otherwise known as 85xx series), but does not have any
286 effect on a non-spe cpu (it does, however add code to the kernel).
288 If in doubt, say Y here.
292 depends on PPC_BOOK3S
294 config PPC_STD_MMU_32
296 depends on PPC_STD_MMU && PPC32
298 config PPC_STD_MMU_64
300 depends on PPC_STD_MMU && PPC64
303 bool "Radix MMU Support"
304 depends on PPC_BOOK3S_64
305 select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
308 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
309 is only implemented by IBM Power9 CPUs, if you don't have one of them
310 you can probably disable this.
312 config ARCH_ENABLE_HUGEPAGE_MIGRATION
314 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
317 config PPC_MMU_NOHASH
319 depends on !PPC_STD_MMU
321 config PPC_BOOK3E_MMU
323 depends on FSL_BOOKE || PPC_BOOK3E
327 default y if PPC_STD_MMU_64
330 config PPC_HAVE_PMU_SUPPORT
335 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
337 This enables the powerpc-specific perf_event back-end.
340 # Allow platforms to force SMP=y by selecting this
346 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
347 select GENERIC_IRQ_MIGRATION
348 bool "Symmetric multi-processing support" if !FORCE_SMP
350 This enables support for systems with more than one CPU. If you have
351 a system with only one CPU, say N. If you have a system with more
352 than one CPU, say Y. Note that the kernel does not currently
353 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
354 since they have inadequate hardware support for multiprocessor
357 If you say N here, the kernel will run on single and multiprocessor
358 machines, but will use only one CPU of a multiprocessor machine. If
359 you say Y here, the kernel will run on single-processor machines.
360 On a single-processor machine, the kernel will run faster if you say
363 If you don't know what to do here, say N.
366 int "Maximum number of CPUs (2-8192)"
369 default "32" if PPC64
372 config NOT_COHERENT_CACHE
374 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || GAMECUBE_COMMON
378 config CHECK_CACHE_COHERENCY
389 depends on PPC32 || CPU_BIG_ENDIAN
391 This symbol controls whether we build the 32-bit VDSO. We obviously
392 want to do that if we're building a 32-bit kernel. If we're building
393 a 64-bit kernel then we only want a 32-bit VDSO if we're building for
394 big endian. That is because the only little endian configuration we
395 support is ppc64le which is 64-bit only.
398 prompt "Endianness selection"
399 default CPU_BIG_ENDIAN
401 This option selects whether a big endian or little endian kernel will
404 config CPU_BIG_ENDIAN
405 bool "Build big endian kernel"
407 Build a big endian kernel.
409 If unsure, select this option.
411 config CPU_LITTLE_ENDIAN
412 bool "Build little endian kernel"
413 depends on PPC_BOOK3S_64
414 select PPC64_BOOT_WRAPPER
416 Build a little endian kernel.
418 Note that if cross compiling a little endian kernel,
419 CROSS_COMPILE must point to a toolchain capable of targeting
420 little endian powerpc.
424 config PPC64_BOOT_WRAPPER
426 depends on CPU_LITTLE_ENDIAN