1 # SPDX-License-Identifier: GPL-2.0 !! 1 # SPDX-License-Identifier: GPL-2.0-only
2 config ARM !! 2 config 64BIT
>> 3 bool "64-bit kernel" if "$(ARCH)" = "sparc"
>> 4 default "$(ARCH)" = "sparc64"
>> 5 help
>> 6 SPARC is a family of RISC microprocessors designed and marketed by
>> 7 Sun Microsystems, incorporated. They are very widely found in Sun
>> 8 workstations and clones.
>> 9
>> 10 Say yes to build a 64-bit kernel - formerly known as sparc64
>> 11 Say no to build a 32-bit kernel - formerly known as sparc
>> 12
>> 13 config SPARC
3 bool 14 bool
4 default y 15 default y
5 select ARCH_32BIT_OFF_T !! 16 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
6 select ARCH_CORRECT_STACKTRACE_ON_KRET !! 17 select ARCH_MIGHT_HAVE_PC_SERIO
7 select ARCH_HAS_BINFMT_FLAT !! 18 select DMA_OPS
8 select ARCH_HAS_CPU_CACHE_ALIASING !! 19 select OF
9 select ARCH_HAS_CPU_FINALIZE_INIT if M !! 20 select OF_PROMTREE
10 select ARCH_HAS_CURRENT_STACK_POINTER !! 21 select HAVE_ASM_MODVERSIONS
11 select ARCH_HAS_DEBUG_VIRTUAL if MMU !! 22 select HAVE_IDE
12 select ARCH_HAS_DMA_ALLOC if MMU !! 23 select HAVE_OPROFILE
13 select ARCH_HAS_DMA_OPS !! 24 select HAVE_ARCH_KGDB if !SMP || SPARC64
14 select ARCH_HAS_DMA_WRITE_COMBINE if ! !! 25 select HAVE_ARCH_TRACEHOOK
15 select ARCH_HAS_ELF_RANDOMIZE !! 26 select HAVE_EXIT_THREAD
16 select ARCH_HAS_FORTIFY_SOURCE !! 27 select HAVE_PCI
17 select ARCH_HAS_KEEPINITRD !! 28 select SYSCTL_EXCEPTION_TRACE
18 select ARCH_HAS_KCOV !! 29 select RTC_CLASS
19 select ARCH_HAS_MEMBARRIER_SYNC_CORE !! 30 select RTC_DRV_M48T59
20 select ARCH_HAS_NON_OVERLAPPING_ADDRES !! 31 select RTC_SYSTOHC
21 select ARCH_HAS_PTE_SPECIAL if ARM_LPA !! 32 select HAVE_ARCH_JUMP_LABEL if SPARC64
22 select ARCH_HAS_SETUP_DMA_OPS <<
23 select ARCH_HAS_SET_MEMORY <<
24 select ARCH_STACKWALK <<
25 select ARCH_HAS_STRICT_KERNEL_RWX if M <<
26 select ARCH_HAS_STRICT_MODULE_RWX if M <<
27 select ARCH_HAS_SYNC_DMA_FOR_DEVICE <<
28 select ARCH_HAS_SYNC_DMA_FOR_CPU <<
29 select ARCH_HAS_TEARDOWN_DMA_OPS if MM <<
30 select ARCH_HAS_TICK_BROADCAST if GENE <<
31 select ARCH_HAVE_NMI_SAFE_CMPXCHG if C <<
32 select ARCH_HAS_GCOV_PROFILE_ALL <<
33 select ARCH_KEEP_MEMBLOCK <<
34 select ARCH_HAS_UBSAN <<
35 select ARCH_MIGHT_HAVE_PC_PARPORT <<
36 select ARCH_OPTIONAL_KERNEL_RWX if ARC <<
37 select ARCH_OPTIONAL_KERNEL_RWX_DEFAUL <<
38 select ARCH_NEED_CMPXCHG_1_EMU if CPU_ <<
39 select ARCH_SUPPORTS_ATOMIC_RMW <<
40 select ARCH_SUPPORTS_CFI_CLANG <<
41 select ARCH_SUPPORTS_HUGETLBFS if ARM_ <<
42 select ARCH_SUPPORTS_PER_VMA_LOCK <<
43 select ARCH_USE_BUILTIN_BSWAP <<
44 select ARCH_USE_CMPXCHG_LOCKREF <<
45 select ARCH_USE_MEMTEST <<
46 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ <<
47 select ARCH_WANT_GENERAL_HUGETLB <<
48 select ARCH_WANT_IPC_PARSE_VERSION <<
49 select ARCH_WANT_LD_ORPHAN_WARN <<
50 select BINFMT_FLAT_ARGVP_ENVP_ON_STACK <<
51 select BUILDTIME_TABLE_SORT if MMU <<
52 select COMMON_CLK if !(ARCH_RPC || ARC <<
53 select CLONE_BACKWARDS <<
54 select CPU_PM if SUSPEND || CPU_IDLE <<
55 select DCACHE_WORD_ACCESS if HAVE_EFFI <<
56 select DMA_DECLARE_COHERENT <<
57 select DMA_GLOBAL_POOL if !MMU <<
58 select DMA_NONCOHERENT_MMAP if MMU <<
59 select EDAC_SUPPORT <<
60 select EDAC_ATOMIC_SCRUB <<
61 select GENERIC_ALLOCATOR <<
62 select GENERIC_ARCH_TOPOLOGY if ARM_CP <<
63 select GENERIC_ATOMIC64 if CPU_V7M || <<
64 select GENERIC_CLOCKEVENTS_BROADCAST i <<
65 select GENERIC_IRQ_IPI if SMP <<
66 select GENERIC_CPU_AUTOPROBE <<
67 select GENERIC_CPU_DEVICES <<
68 select GENERIC_EARLY_IOREMAP <<
69 select GENERIC_IDLE_POLL_SETUP <<
70 select GENERIC_IRQ_MULTI_HANDLER <<
71 select GENERIC_IRQ_PROBE <<
72 select GENERIC_IRQ_SHOW 33 select GENERIC_IRQ_SHOW
73 select GENERIC_IRQ_SHOW_LEVEL !! 34 select ARCH_WANT_IPC_PARSE_VERSION
74 select GENERIC_LIB_DEVMEM_IS_ALLOWED <<
75 select GENERIC_PCI_IOMAP 35 select GENERIC_PCI_IOMAP
76 select GENERIC_SCHED_CLOCK !! 36 select HAVE_NMI_WATCHDOG if SPARC64
>> 37 select HAVE_CBPF_JIT if SPARC32
>> 38 select HAVE_EBPF_JIT if SPARC64
>> 39 select HAVE_DEBUG_BUGVERBOSE
77 select GENERIC_SMP_IDLE_THREAD 40 select GENERIC_SMP_IDLE_THREAD
78 select HARDIRQS_SW_RESEND !! 41 select GENERIC_CLOCKEVENTS
79 select HAS_IOPORT !! 42 select GENERIC_STRNCPY_FROM_USER
80 select HAVE_ARCH_AUDITSYSCALL if AEABI !! 43 select GENERIC_STRNLEN_USER
81 select HAVE_ARCH_BITREVERSE if (CPU_32 !! 44 select MODULES_USE_ELF_RELA
82 select HAVE_ARCH_JUMP_LABEL if !XIP_KE <<
83 select HAVE_ARCH_KFENCE if MMU && !XIP <<
84 select HAVE_ARCH_KGDB if !CPU_ENDIAN_B <<
85 select HAVE_ARCH_KASAN if MMU && !XIP_ <<
86 select HAVE_ARCH_KASAN_VMALLOC if HAVE <<
87 select HAVE_ARCH_MMAP_RND_BITS if MMU <<
88 select HAVE_ARCH_PFN_VALID <<
89 select HAVE_ARCH_SECCOMP <<
90 select HAVE_ARCH_SECCOMP_FILTER if AEA <<
91 select HAVE_ARCH_STACKLEAK <<
92 select HAVE_ARCH_THREAD_STRUCT_WHITELI <<
93 select HAVE_ARCH_TRACEHOOK <<
94 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
95 select HAVE_ARM_SMCCC if CPU_V7 <<
96 select HAVE_EBPF_JIT if !CPU_ENDIAN_BE <<
97 select HAVE_CONTEXT_TRACKING_USER <<
98 select HAVE_C_RECORDMCOUNT <<
99 select HAVE_BUILDTIME_MCOUNT_SORT <<
100 select HAVE_DEBUG_KMEMLEAK if !XIP_KER <<
101 select HAVE_DMA_CONTIGUOUS if MMU <<
102 select HAVE_DYNAMIC_FTRACE if !XIP_KER <<
103 select HAVE_DYNAMIC_FTRACE_WITH_REGS i <<
104 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
105 select HAVE_EXIT_THREAD <<
106 select HAVE_GUP_FAST if ARM_LPAE <<
107 select HAVE_FTRACE_MCOUNT_RECORD if !X <<
108 select HAVE_FUNCTION_ERROR_INJECTION <<
109 select HAVE_FUNCTION_GRAPH_TRACER <<
110 select HAVE_FUNCTION_TRACER if !XIP_KE <<
111 select HAVE_GCC_PLUGINS <<
112 select HAVE_HW_BREAKPOINT if PERF_EVEN <<
113 select HAVE_IRQ_TIME_ACCOUNTING <<
114 select HAVE_KERNEL_GZIP <<
115 select HAVE_KERNEL_LZ4 <<
116 select HAVE_KERNEL_LZMA <<
117 select HAVE_KERNEL_LZO <<
118 select HAVE_KERNEL_XZ <<
119 select HAVE_KPROBES if !XIP_KERNEL && <<
120 select HAVE_KRETPROBES if HAVE_KPROBES <<
121 select HAVE_LD_DEAD_CODE_DATA_ELIMINAT <<
122 select HAVE_MOD_ARCH_SPECIFIC <<
123 select HAVE_NMI <<
124 select HAVE_OPTPROBES if !THUMB2_KERNE <<
125 select HAVE_PAGE_SIZE_4KB <<
126 select HAVE_PCI if MMU <<
127 select HAVE_PERF_EVENTS <<
128 select HAVE_PERF_REGS <<
129 select HAVE_PERF_USER_STACK_DUMP <<
130 select MMU_GATHER_RCU_TABLE_FREE if SM <<
131 select HAVE_REGS_AND_STACK_ACCESS_API <<
132 select HAVE_RSEQ <<
133 select HAVE_STACKPROTECTOR <<
134 select HAVE_SYSCALL_TRACEPOINTS <<
135 select HAVE_UID16 <<
136 select HAVE_VIRT_CPU_ACCOUNTING_GEN <<
137 select HOTPLUG_CORE_SYNC_DEAD if HOTPL <<
138 select IRQ_FORCED_THREADING <<
139 select LOCK_MM_AND_FIND_VMA <<
140 select MODULES_USE_ELF_REL <<
141 select NEED_DMA_MAP_STATE <<
142 select OF_EARLY_FLATTREE if OF <<
143 select OLD_SIGACTION <<
144 select OLD_SIGSUSPEND3 <<
145 select PCI_DOMAINS_GENERIC if PCI <<
146 select PCI_SYSCALL if PCI 45 select PCI_SYSCALL if PCI
147 select PERF_USE_VMALLOC !! 46 select ODD_RT_SIGACTION
148 select RTC_LIB !! 47 select OLD_SIGSUSPEND
149 select SPARSE_IRQ if !(ARCH_FOOTBRIDGE !! 48 select CPU_NO_EFFICIENT_FFS
150 select SYS_SUPPORTS_APM_EMULATION !! 49 select LOCKDEP_SMALL if LOCKDEP
151 select THREAD_INFO_IN_TASK !! 50 select NEED_DMA_MAP_STATE
152 select TIMER_OF if OF <<
153 select HAVE_ARCH_VMAP_STACK if MMU && <<
154 select TRACE_IRQFLAGS_SUPPORT if !CPU_ <<
155 select USE_OF if !(ARCH_FOOTBRIDGE || <<
156 # Above selects are sorted alphabetica <<
157 # according to that. Thanks. <<
158 help <<
159 The ARM series is a line of low-powe <<
160 licensed by ARM Ltd and targeted at <<
161 handhelds such as the Compaq IPAQ. <<
162 manufactured, but legacy ARM-based P <<
163 Europe. There is an ARM Linux proje <<
164 <http://www.arm.linux.org.uk/>. <<
165 <<
166 config ARM_HAS_GROUP_RELOCS <<
167 def_bool y <<
168 depends on !LD_IS_LLD || LLD_VERSION > <<
169 depends on !COMPILE_TEST <<
170 help <<
171 Whether or not to use R_ARM_ALU_PC_G <<
172 relocations, which have been around <<
173 supported in LLD until version 14. T <<
174 which is usually sufficient, but not <<
175 this feature when doing compile test <<
176 <<
177 config ARM_DMA_USE_IOMMU <<
178 bool <<
179 select NEED_SG_DMA_LENGTH 51 select NEED_SG_DMA_LENGTH
180 52
181 if ARM_DMA_USE_IOMMU !! 53 config SPARC32
182 !! 54 def_bool !64BIT
183 config ARM_DMA_IOMMU_ALIGNMENT !! 55 select ARCH_32BIT_OFF_T
184 int "Maximum PAGE_SIZE order of alignm !! 56 select ARCH_HAS_SYNC_DMA_FOR_CPU
185 range 4 9 !! 57 select GENERIC_ATOMIC64
186 default 8 !! 58 select CLZ_TAB
187 help !! 59 select HAVE_UID16
188 DMA mapping framework by default ali !! 60 select OLD_SIGACTION
189 PAGE_SIZE order which is greater tha <<
190 size. This works well for buffers up <<
191 for larger buffers it just a waste o <<
192 relatively small addressing window ( <<
193 virtual space with just a few alloca <<
194 <<
195 With this parameter you can specify <<
196 DMA IOMMU buffers. Larger buffers wi <<
197 specified order. The order is expres <<
198 by the PAGE_SIZE. <<
199 <<
200 endif <<
201 <<
202 config SYS_SUPPORTS_APM_EMULATION <<
203 bool <<
204 61
205 config HAVE_TCM !! 62 config SPARC64
206 bool !! 63 def_bool 64BIT
207 select GENERIC_ALLOCATOR !! 64 select HAVE_FUNCTION_TRACER
>> 65 select HAVE_FUNCTION_GRAPH_TRACER
>> 66 select HAVE_KRETPROBES
>> 67 select HAVE_KPROBES
>> 68 select MMU_GATHER_RCU_TABLE_FREE if SMP
>> 69 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
>> 70 select HAVE_DYNAMIC_FTRACE
>> 71 select HAVE_FTRACE_MCOUNT_RECORD
>> 72 select HAVE_SYSCALL_TRACEPOINTS
>> 73 select HAVE_CONTEXT_TRACKING
>> 74 select HAVE_TIF_NOHZ
>> 75 select HAVE_DEBUG_KMEMLEAK
>> 76 select IOMMU_HELPER
>> 77 select SPARSE_IRQ
>> 78 select RTC_DRV_CMOS
>> 79 select RTC_DRV_BQ4802
>> 80 select RTC_DRV_SUN4V
>> 81 select RTC_DRV_STARFIRE
>> 82 select HAVE_PERF_EVENTS
>> 83 select PERF_USE_VMALLOC
>> 84 select ARCH_HAVE_NMI_SAFE_CMPXCHG
>> 85 select HAVE_C_RECORDMCOUNT
>> 86 select HAVE_ARCH_AUDITSYSCALL
>> 87 select ARCH_SUPPORTS_ATOMIC_RMW
>> 88 select HAVE_NMI
>> 89 select HAVE_REGS_AND_STACK_ACCESS_API
>> 90 select ARCH_USE_QUEUED_RWLOCKS
>> 91 select ARCH_USE_QUEUED_SPINLOCKS
>> 92 select GENERIC_TIME_VSYSCALL
>> 93 select ARCH_CLOCKSOURCE_DATA
>> 94 select ARCH_HAS_PTE_SPECIAL
>> 95 select PCI_DOMAINS if PCI
>> 96 select ARCH_HAS_GIGANTIC_PAGE
208 97
209 config HAVE_PROC_CPU !! 98 config ARCH_PROC_KCORE_TEXT
210 bool !! 99 def_bool y
211 100
212 config NO_IOPORT_MAP !! 101 config CPU_BIG_ENDIAN
213 bool !! 102 def_bool y
214 103
215 config SBUS !! 104 config ARCH_ATU
216 bool 105 bool
>> 106 default y if SPARC64
217 107
218 config STACKTRACE_SUPPORT 108 config STACKTRACE_SUPPORT
219 bool 109 bool
220 default y !! 110 default y if SPARC64
221 111
222 config LOCKDEP_SUPPORT 112 config LOCKDEP_SUPPORT
223 bool 113 bool
224 default y !! 114 default y if SPARC64
225 <<
226 config ARCH_HAS_ILOG2_U32 <<
227 bool <<
228 <<
229 config ARCH_HAS_ILOG2_U64 <<
230 bool <<
231 <<
232 config ARCH_HAS_BANDGAP <<
233 bool <<
234 115
235 config FIX_EARLYCON_MEM !! 116 config ARCH_HIBERNATION_POSSIBLE
236 def_bool y if MMU !! 117 def_bool y if SPARC64
237 <<
238 config GENERIC_HWEIGHT <<
239 bool <<
240 default y <<
241 118
242 config GENERIC_CALIBRATE_DELAY !! 119 config AUDIT_ARCH
243 bool 120 bool
244 default y 121 default y
245 122
246 config ARCH_MAY_HAVE_PC_FDC !! 123 config HAVE_SETUP_PER_CPU_AREA
247 bool !! 124 def_bool y if SPARC64
248 <<
249 config ARCH_SUPPORTS_UPROBES <<
250 def_bool y <<
251 125
252 config GENERIC_ISA_DMA !! 126 config NEED_PER_CPU_EMBED_FIRST_CHUNK
253 bool !! 127 def_bool y if SPARC64
254 128
255 config FIQ !! 129 config NEED_PER_CPU_PAGE_FIRST_CHUNK
256 bool !! 130 def_bool y if SPARC64
257 131
258 config ARCH_MTD_XIP !! 132 config MMU
259 bool 133 bool
260 <<
261 config ARM_PATCH_PHYS_VIRT <<
262 bool "Patch physical to virtual transl <<
263 default y 134 default y
264 depends on MMU <<
265 help <<
266 Patch phys-to-virt and virt-to-phys <<
267 boot and module load time according <<
268 kernel in system memory. <<
269 <<
270 This can only be used with non-XIP M <<
271 of physical memory is at a 2 MiB bou <<
272 135
273 Only disable this option if you know !! 136 config HIGHMEM
274 this feature (eg, building a kernel <<
275 you need to shrink the kernel to the <<
276 <<
277 config NEED_MACH_IO_H <<
278 bool 137 bool
279 help !! 138 default y if SPARC32
280 Select this when mach/io.h is requir <<
281 definitions for this platform. The <<
282 be avoided when possible. <<
283 139
284 config NEED_MACH_MEMORY_H !! 140 config ZONE_DMA
285 bool 141 bool
286 help !! 142 default y if SPARC32
287 Select this when mach/memory.h is re <<
288 definitions for this platform. The <<
289 be avoided when possible. <<
290 143
291 config PHYS_OFFSET !! 144 config GENERIC_ISA_DMA
292 hex "Physical address of main memory" !! 145 bool
293 depends on !ARM_PATCH_PHYS_VIRT || !AU !! 146 default y if SPARC32
294 default DRAM_BASE if !MMU <<
295 default 0x00000000 if ARCH_FOOTBRIDGE <<
296 default 0x10000000 if ARCH_OMAP1 || AR <<
297 default 0xa0000000 if ARCH_PXA <<
298 default 0xc0000000 if ARCH_EP93XX || A <<
299 default 0 <<
300 help <<
301 Please provide the physical address <<
302 location of main memory in your syst <<
303 147
304 config GENERIC_BUG !! 148 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
305 def_bool y !! 149 def_bool y if SPARC64
306 depends on BUG <<
307 150
308 config PGTABLE_LEVELS 151 config PGTABLE_LEVELS
309 int !! 152 default 4 if 64BIT
310 default 3 if ARM_LPAE !! 153 default 3
311 default 2 <<
312 <<
313 menu "System Type" <<
314 <<
315 config MMU <<
316 bool "MMU-based Paged Memory Managemen <<
317 default y <<
318 help <<
319 Select if you want MMU-based virtual <<
320 support by paged memory management. <<
321 <<
322 config ARM_SINGLE_ARMV7M <<
323 def_bool !MMU <<
324 select ARM_NVIC <<
325 select CPU_V7M <<
326 select NO_IOPORT_MAP <<
327 154
328 config ARCH_MMAP_RND_BITS_MIN !! 155 config ARCH_SUPPORTS_UPROBES
329 default 8 !! 156 def_bool y if SPARC64
330 157
331 config ARCH_MMAP_RND_BITS_MAX !! 158 menu "Processor type and features"
332 default 14 if PAGE_OFFSET=0x40000000 <<
333 default 15 if PAGE_OFFSET=0x80000000 <<
334 default 16 <<
335 159
336 config ARCH_MULTIPLATFORM !! 160 config SMP
337 bool "Require kernel to be portable to !! 161 bool "Symmetric multi-processing support"
338 depends on MMU && !(ARCH_FOOTBRIDGE || <<
339 default y <<
340 help 162 help
341 In general, all Arm machines can be !! 163 This enables support for systems with more than one CPU. If you have
342 kernel image, covering either Armv4/ !! 164 a system with only one CPU, say N. If you have a system with more
343 !! 165 than one CPU, say Y.
344 However, some configuration options <<
345 specific physical addresses or enabl <<
346 break other machines. <<
347 <<
348 Selecting N here allows using those <<
349 DEBUG_UNCOMPRESS, XIP_KERNEL and ZBO <<
350 <<
351 source "arch/arm/Kconfig.platforms" <<
352 <<
353 # <<
354 # This is sorted alphabetically by mach-* path <<
355 # Kconfigs may be included either alphabetical <<
356 # plat- suffix) or along side the correspondin <<
357 # <<
358 source "arch/arm/mach-actions/Kconfig" <<
359 <<
360 source "arch/arm/mach-alpine/Kconfig" <<
361 <<
362 source "arch/arm/mach-artpec/Kconfig" <<
363 <<
364 source "arch/arm/mach-aspeed/Kconfig" <<
365 <<
366 source "arch/arm/mach-at91/Kconfig" <<
367 <<
368 source "arch/arm/mach-axxia/Kconfig" <<
369 <<
370 source "arch/arm/mach-bcm/Kconfig" <<
371 <<
372 source "arch/arm/mach-berlin/Kconfig" <<
373 <<
374 source "arch/arm/mach-clps711x/Kconfig" <<
375 <<
376 source "arch/arm/mach-davinci/Kconfig" <<
377 <<
378 source "arch/arm/mach-digicolor/Kconfig" <<
379 <<
380 source "arch/arm/mach-dove/Kconfig" <<
381 <<
382 source "arch/arm/mach-ep93xx/Kconfig" <<
383 <<
384 source "arch/arm/mach-exynos/Kconfig" <<
385 <<
386 source "arch/arm/mach-footbridge/Kconfig" <<
387 <<
388 source "arch/arm/mach-gemini/Kconfig" <<
389 <<
390 source "arch/arm/mach-highbank/Kconfig" <<
391 <<
392 source "arch/arm/mach-hisi/Kconfig" <<
393 <<
394 source "arch/arm/mach-hpe/Kconfig" <<
395 <<
396 source "arch/arm/mach-imx/Kconfig" <<
397 <<
398 source "arch/arm/mach-ixp4xx/Kconfig" <<
399 <<
400 source "arch/arm/mach-keystone/Kconfig" <<
401 <<
402 source "arch/arm/mach-lpc32xx/Kconfig" <<
403 <<
404 source "arch/arm/mach-mediatek/Kconfig" <<
405 <<
406 source "arch/arm/mach-meson/Kconfig" <<
407 <<
408 source "arch/arm/mach-milbeaut/Kconfig" <<
409 <<
410 source "arch/arm/mach-mmp/Kconfig" <<
411 <<
412 source "arch/arm/mach-mstar/Kconfig" <<
413 <<
414 source "arch/arm/mach-mv78xx0/Kconfig" <<
415 <<
416 source "arch/arm/mach-mvebu/Kconfig" <<
417 <<
418 source "arch/arm/mach-mxs/Kconfig" <<
419 <<
420 source "arch/arm/mach-nomadik/Kconfig" <<
421 <<
422 source "arch/arm/mach-npcm/Kconfig" <<
423 <<
424 source "arch/arm/mach-omap1/Kconfig" <<
425 <<
426 source "arch/arm/mach-omap2/Kconfig" <<
427 <<
428 source "arch/arm/mach-orion5x/Kconfig" <<
429 <<
430 source "arch/arm/mach-pxa/Kconfig" <<
431 <<
432 source "arch/arm/mach-qcom/Kconfig" <<
433 <<
434 source "arch/arm/mach-realtek/Kconfig" <<
435 <<
436 source "arch/arm/mach-rpc/Kconfig" <<
437 <<
438 source "arch/arm/mach-rockchip/Kconfig" <<
439 <<
440 source "arch/arm/mach-s3c/Kconfig" <<
441 <<
442 source "arch/arm/mach-s5pv210/Kconfig" <<
443 <<
444 source "arch/arm/mach-sa1100/Kconfig" <<
445 <<
446 source "arch/arm/mach-shmobile/Kconfig" <<
447 <<
448 source "arch/arm/mach-socfpga/Kconfig" <<
449 <<
450 source "arch/arm/mach-spear/Kconfig" <<
451 <<
452 source "arch/arm/mach-sti/Kconfig" <<
453 <<
454 source "arch/arm/mach-stm32/Kconfig" <<
455 <<
456 source "arch/arm/mach-sunxi/Kconfig" <<
457 <<
458 source "arch/arm/mach-tegra/Kconfig" <<
459 <<
460 source "arch/arm/mach-ux500/Kconfig" <<
461 166
462 source "arch/arm/mach-versatile/Kconfig" !! 167 If you say N here, the kernel will run on uni- and multiprocessor
>> 168 machines, but will use only one CPU of a multiprocessor machine. If
>> 169 you say Y here, the kernel will run on many, but not all,
>> 170 uniprocessor machines. On a uniprocessor machine, the kernel
>> 171 will run faster if you say N here.
463 172
464 source "arch/arm/mach-vt8500/Kconfig" !! 173 People using multiprocessor machines who say Y here should also say
>> 174 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 175 Management" code will be disabled if you say Y here.
465 176
466 source "arch/arm/mach-zynq/Kconfig" !! 177 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
>> 178 available at <http://www.tldp.org/docs.html#howto>.
467 179
468 # ARMv7-M architecture !! 180 If you don't know what to do here, say N.
469 config ARCH_LPC18XX <<
470 bool "NXP LPC18xx/LPC43xx" <<
471 depends on ARM_SINGLE_ARMV7M <<
472 select ARCH_HAS_RESET_CONTROLLER <<
473 select ARM_AMBA <<
474 select CLKSRC_LPC32XX <<
475 select PINCTRL <<
476 help <<
477 Support for NXP's LPC18xx Cortex-M3 <<
478 high performance microcontrollers. <<
479 181
480 config ARCH_MPS2 !! 182 config NR_CPUS
481 bool "ARM MPS2 platform" !! 183 int "Maximum number of CPUs"
482 depends on ARM_SINGLE_ARMV7M !! 184 depends on SMP
483 select ARM_AMBA !! 185 range 2 32 if SPARC32
484 select CLKSRC_MPS2 !! 186 range 2 4096 if SPARC64
485 help !! 187 default 32 if SPARC32
486 Support for Cortex-M Prototyping Sys !! 188 default 4096 if SPARC64
487 with a range of available cores like <<
488 189
489 Please, note that depends which Appl !! 190 source "kernel/Kconfig.hz"
490 for the platform may vary, so adjust <<
491 191
492 # Definitions to make life easier !! 192 config GENERIC_HWEIGHT
493 config ARCH_ACORN <<
494 bool 193 bool
>> 194 default y
495 195
496 config PLAT_ORION !! 196 config GENERIC_CALIBRATE_DELAY
497 bool 197 bool
498 select CLKSRC_MMIO !! 198 default y
499 select GENERIC_IRQ_CHIP <<
500 select IRQ_DOMAIN <<
501 199
502 config PLAT_ORION_LEGACY !! 200 config ARCH_MAY_HAVE_PC_FDC
503 bool 201 bool
504 select PLAT_ORION !! 202 default y
505 203
506 config PLAT_VERSATILE !! 204 config EMULATED_CMPXCHG
507 bool 205 bool
508 !! 206 default y if SPARC32
509 source "arch/arm/mm/Kconfig" <<
510 <<
511 config IWMMXT <<
512 bool "Enable iWMMXt support" <<
513 depends on CPU_XSCALE || CPU_XSC3 || C <<
514 default y if PXA27x || PXA3xx || ARCH_ <<
515 help 207 help
516 Enable support for iWMMXt context sw !! 208 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
517 running on a CPU that supports it. !! 209 is emulated, and therefore it is not completely atomic.
518 <<
519 if !MMU <<
520 source "arch/arm/Kconfig-nommu" <<
521 endif <<
522 <<
523 config PJ4B_ERRATA_4742 <<
524 bool "PJ4B Errata 4742: IDLE Wake Up C <<
525 depends on CPU_PJ4B && MACH_ARMADA_370 <<
526 default y <<
527 help <<
528 When coming out of either a Wait for <<
529 Event (WFE) IDLE states, a specific <<
530 the retiring WFI/WFE instructions an <<
531 instructions. This sensitivity can <<
532 Workaround: <<
533 The software must insert either a Da <<
534 or Data Memory Barrier (DMB) command <<
535 instruction <<
536 <<
537 config ARM_ERRATA_326103 <<
538 bool "ARM errata: FSR write bit incorr <<
539 depends on CPU_V6 <<
540 help <<
541 Executing a SWP instruction to read- <<
542 of the FSR on the ARM 1136 prior to <<
543 treat the access as a read, preventi <<
544 causing the faulting task to liveloc <<
545 <<
546 config ARM_ERRATA_411920 <<
547 bool "ARM errata: Invalidation of the <<
548 depends on CPU_V6 || CPU_V6K <<
549 help <<
550 Invalidation of the Instruction Cach <<
551 fail. This erratum is present in 113 <<
552 It does not affect the MPCore. This <<
553 recommended workaround. <<
554 <<
555 config ARM_ERRATA_430973 <<
556 bool "ARM errata: Stale prediction on <<
557 depends on CPU_V7 <<
558 help <<
559 This option enables the workaround f <<
560 r1p* erratum. If a code sequence con <<
561 interworking branch is replaced with <<
562 same virtual address, whether due to <<
563 to physical address re-mapping, Cort <<
564 stale interworking branch prediction <<
565 executing the new code sequence in t <<
566 The workaround enables the BTB/BTAC <<
567 and also flushes the branch target c <<
568 Note that setting specific bits in t <<
569 available in non-secure mode. <<
570 <<
571 config ARM_ERRATA_458693 <<
572 bool "ARM errata: Processor deadlock w <<
573 depends on CPU_V7 <<
574 depends on !ARCH_MULTIPLATFORM <<
575 help <<
576 This option enables the workaround f <<
577 erratum. For very specific sequences <<
578 possible for a hazard condition inte <<
579 be incorrectly associated with a dif <<
580 hazard might then cause a processor <<
581 the L1 caching of the NEON accesses <<
582 in the ACTLR register. Note that set <<
583 register may not be available in non <<
584 available on a multiplatform kernel. <<
585 bootloader instead. <<
586 <<
587 config ARM_ERRATA_460075 <<
588 bool "ARM errata: Data written to the <<
589 depends on CPU_V7 <<
590 depends on !ARCH_MULTIPLATFORM <<
591 help <<
592 This option enables the workaround f <<
593 erratum. Any asynchronous access to <<
594 situation in which recent store tran <<
595 and overwritten with stale memory co <<
596 workaround disables the write-alloca <<
597 ACTLR register. Note that setting sp <<
598 may not be available in non-secure m <<
599 a multiplatform kernel. This should <<
600 instead. <<
601 <<
602 config ARM_ERRATA_742230 <<
603 bool "ARM errata: DMB operation may be <<
604 depends on CPU_V7 && SMP <<
605 depends on !ARCH_MULTIPLATFORM <<
606 help <<
607 This option enables the workaround f <<
608 (r1p0..r2p2) erratum. Under rare cir <<
609 between two write operations may not <<
610 ordering of the two writes. This wor <<
611 the diagnostic register of the Corte <<
612 instruction to behave as a DSB, ensu <<
613 the two writes. Note that setting sp <<
614 register may not be available in non <<
615 available on a multiplatform kernel. <<
616 bootloader instead. <<
617 <<
618 config ARM_ERRATA_742231 <<
619 bool "ARM errata: Incorrect hazard han <<
620 depends on CPU_V7 && SMP <<
621 depends on !ARCH_MULTIPLATFORM <<
622 help <<
623 This option enables the workaround f <<
624 (r2p0..r2p2) erratum. Under certain <<
625 Cortex-A9 MPCore micro-architecture, <<
626 accessing some data located in the s <<
627 data due to bad handling of the addr <<
628 replaced from one of the CPUs at the <<
629 accessing it. This workaround sets s <<
630 register of the Cortex-A9 which redu <<
631 capabilities of the processor. Note <<
632 diagnostics register may not be avai <<
633 is not available on a multiplatform <<
634 the bootloader instead. <<
635 <<
636 config ARM_ERRATA_643719 <<
637 bool "ARM errata: LoUIS bit field in C <<
638 depends on CPU_V7 && SMP <<
639 default y <<
640 help <<
641 This option enables the workaround f <<
642 r1p0) erratum. On affected cores the <<
643 register returns zero when it should <<
644 corrects this value, ensuring cache <<
645 it behave as intended and avoiding d <<
646 <<
647 config ARM_ERRATA_720789 <<
648 bool "ARM errata: TLBIASIDIS and TLBIM <<
649 depends on CPU_V7 <<
650 help <<
651 This option enables the workaround f <<
652 r2p0) erratum. A faulty ASID can be <<
653 broadcasted CP15 TLB maintenance ope <<
654 As a consequence of this erratum, so <<
655 invalidated are not, resulting in an <<
656 tables. The workaround changes the T <<
657 entries regardless of the ASID. <<
658 <<
659 config ARM_ERRATA_743622 <<
660 bool "ARM errata: Faulty hazard checki <<
661 depends on CPU_V7 <<
662 depends on !ARCH_MULTIPLATFORM <<
663 help <<
664 This option enables the workaround f <<
665 (r2p*) erratum. Under very rare cond <<
666 optimisation in the Cortex-A9 Store <<
667 corruption. This workaround sets a s <<
668 register of the Cortex-A9 which disa <<
669 optimisation, preventing the defect <<
670 visible impact on the overall perfor <<
671 processor. Note that setting specifi <<
672 may not be available in non-secure m <<
673 multiplatform kernel. This should be <<
674 <<
675 config ARM_ERRATA_751472 <<
676 bool "ARM errata: Interrupted ICIALLUI <<
677 depends on CPU_V7 <<
678 depends on !ARCH_MULTIPLATFORM <<
679 help <<
680 This option enables the workaround f <<
681 to r3p0) erratum. An interrupted ICI <<
682 completion of a following broadcaste <<
683 operation is received by a CPU befor <<
684 potentially leading to corrupted ent <<
685 Note that setting specific bits in t <<
686 not be available in non-secure mode <<
687 a multiplatform kernel. This should <<
688 instead. <<
689 <<
690 config ARM_ERRATA_754322 <<
691 bool "ARM errata: possible faulty MMU <<
692 depends on CPU_V7 <<
693 help <<
694 This option enables the workaround f <<
695 r3p*) erratum. A speculative memory <<
696 which starts prior to an ASID switch <<
697 can populate the micro-TLB with a st <<
698 the new ASID. This workaround places <<
699 switching code so that no page table <<
700 <<
701 config ARM_ERRATA_754327 <<
702 bool "ARM errata: no automatic Store B <<
703 depends on CPU_V7 && SMP <<
704 help <<
705 This option enables the workaround f <<
706 r2p0) erratum. The Store Buffer does <<
707 mechanism and therefore a livelock m <<
708 continuously polls a memory location <<
709 This workaround defines cpu_relax() <<
710 written polling loops from denying v <<
711 <<
712 config ARM_ERRATA_364296 <<
713 bool "ARM errata: Possible cache data <<
714 depends on CPU_V6 <<
715 help <<
716 This options enables the workaround <<
717 r0p2 erratum (possible cache data co <<
718 hit-under-miss enabled). It sets the <<
719 the auxiliary control register and t <<
720 register, thus disabling hit-under-m <<
721 processor into full low interrupt la <<
722 is not affected. <<
723 <<
724 config ARM_ERRATA_764369 <<
725 bool "ARM errata: Data cache line main <<
726 depends on CPU_V7 && SMP <<
727 help <<
728 This option enables the workaround f <<
729 affecting Cortex-A9 MPCore with two <<
730 current revisions). Under certain ti <<
731 cache line maintenance operation by <<
732 Shareable memory region may fail to <<
733 Point of Coherency or to the Point o <<
734 system. This workaround adds a DSB i <<
735 relevant cache maintenance functions <<
736 in the diagnostic control register o <<
737 <<
738 config ARM_ERRATA_764319 <<
739 bool "ARM errata: Read to DBGPRSR and <<
740 depends on CPU_V7 <<
741 help <<
742 This option enables the workaround f <<
743 CP14 read accesses to the DBGPRSR an <<
744 unexpected Undefined Instruction exc <<
745 external pin is set to 0, even when <<
746 from a privileged mode. This work ar <<
747 way the kernel does not stop executi <<
748 <<
749 config ARM_ERRATA_775420 <<
750 bool "ARM errata: A data cache maintena <<
751 depends on CPU_V7 <<
752 help <<
753 This option enables the workaround fo <<
754 r2p6,r2p8,r2p10,r3p0) erratum. In cas <<
755 operation aborts with MMU exception, <<
756 to deadlock. This workaround puts DSB <<
757 an abort may occur on cache maintenan <<
758 <<
759 config ARM_ERRATA_798181 <<
760 bool "ARM errata: TLBI/DSB failure on <<
761 depends on CPU_V7 && SMP <<
762 help <<
763 On Cortex-A15 (r0p0..r3p2) the TLBI* <<
764 adequately shooting down all use of <<
765 option enables the Linux kernel work <<
766 which sends an IPI to the CPUs that <<
767 as the one being invalidated. <<
768 <<
769 config ARM_ERRATA_773022 <<
770 bool "ARM errata: incorrect instructio <<
771 depends on CPU_V7 <<
772 help <<
773 This option enables the workaround f <<
774 (up to r0p4) erratum. In certain rar <<
775 loop buffer may deliver incorrect in <<
776 workaround disables the loop buffer <<
777 <<
778 config ARM_ERRATA_818325_852422 <<
779 bool "ARM errata: A12: some seqs of op <<
780 depends on CPU_V7 <<
781 help <<
782 This option enables the workaround f <<
783 - Cortex-A12 818325: Execution of an <<
784 instruction might deadlock. Fixed <<
785 - Cortex-A12 852422: Execution of a <<
786 lead to either a data corruption o <<
787 any Cortex-A12 cores yet. <<
788 This workaround for all both errata <<
789 Feature Register. This bit disables <<
790 sequence of 2 instructions that use <<
791 <<
792 config ARM_ERRATA_821420 <<
793 bool "ARM errata: A12: sequence of VMO <<
794 depends on CPU_V7 <<
795 help <<
796 This option enables the workaround f <<
797 (all revs) erratum. In very rare tim <<
798 of VMOV to Core registers instructio <<
799 one is in the shadow of a branch or <<
800 deadlock when the VMOV instructions <<
801 <<
802 config ARM_ERRATA_825619 <<
803 bool "ARM errata: A12: DMB NSHST/ISHST <<
804 depends on CPU_V7 <<
805 help <<
806 This option enables the workaround f <<
807 (all revs) erratum. Within rare timi <<
808 DMB NSHST or DMB ISHST instruction f <<
809 and Device/Strongly-Ordered loads an <<
810 <<
811 config ARM_ERRATA_857271 <<
812 bool "ARM errata: A12: CPU might deadl <<
813 depends on CPU_V7 <<
814 help <<
815 This option enables the workaround f <<
816 (all revs) erratum. Under very rare <<
817 hang. The workaround is expected to <<
818 <<
819 config ARM_ERRATA_852421 <<
820 bool "ARM errata: A17: DMB ST might fa <<
821 depends on CPU_V7 <<
822 help <<
823 This option enables the workaround f <<
824 (r1p0, r1p1, r1p2) erratum. Under ve <<
825 execution of a DMB ST instruction mi <<
826 stores from GroupA and stores from G <<
827 <<
828 config ARM_ERRATA_852423 <<
829 bool "ARM errata: A17: some seqs of op <<
830 depends on CPU_V7 <<
831 help <<
832 This option enables the workaround f <<
833 - Cortex-A17 852423: Execution of a <<
834 lead to either a data corruption o <<
835 any Cortex-A17 cores yet. <<
836 This is identical to Cortex-A12 erra <<
837 config option from the A12 erratum d <<
838 for and handled. <<
839 <<
840 config ARM_ERRATA_857272 <<
841 bool "ARM errata: A17: CPU might deadl <<
842 depends on CPU_V7 <<
843 help <<
844 This option enables the workaround f <<
845 This erratum is not known to be fixe <<
846 This is identical to Cortex-A12 erra <<
847 config option from the A12 erratum d <<
848 for and handled. <<
849 <<
850 endmenu <<
851 <<
852 source "arch/arm/common/Kconfig" <<
853 <<
854 menu "Bus support" <<
855 210
856 config ISA !! 211 # Makefile helpers
>> 212 config SPARC32_SMP
857 bool 213 bool
858 help !! 214 default y
859 Find out whether you have ISA slots !! 215 depends on SPARC32 && SMP
860 name of a bus system, i.e. the way t <<
861 inside your box. Other bus systems <<
862 (MCA) or VESA. ISA is an older syst <<
863 newer boards don't support it. If y <<
864 216
865 # Select ISA DMA interface !! 217 config SPARC64_SMP
866 config ISA_DMA_API <<
867 bool 218 bool
>> 219 default y
>> 220 depends on SPARC64 && SMP
868 221
869 config ARM_ERRATA_814220 !! 222 config EARLYFB
870 bool "ARM errata: Cache maintenance by !! 223 bool "Support for early boot text console"
871 depends on CPU_V7 !! 224 default y
>> 225 depends on SPARC64
872 help 226 help
873 The v7 ARM states that all cache and !! 227 Say Y here to enable a faster early framebuffer boot console.
874 operations that do not specify an ad <<
875 each other, in program order. <<
876 However, because of this erratum, an <<
877 operation can overtake an L1 set/way <<
878 This ERRATA only affected the Cortex <<
879 r0p4, r0p5. <<
880 228
881 endmenu !! 229 config SECCOMP
>> 230 bool "Enable seccomp to safely compute untrusted bytecode"
>> 231 depends on SPARC64 && PROC_FS
>> 232 default y
>> 233 help
>> 234 This kernel feature is useful for number crunching applications
>> 235 that may need to compute untrusted bytecode during their
>> 236 execution. By using pipes or other transports made available to
>> 237 the process as file descriptors supporting the read/write
>> 238 syscalls, it's possible to isolate those applications in
>> 239 their own address space using seccomp. Once seccomp is
>> 240 enabled via /proc/<pid>/seccomp, it cannot be disabled
>> 241 and the task is only allowed to execute a few safe syscalls
>> 242 defined by each seccomp mode.
882 243
883 menu "Kernel Features" !! 244 If unsure, say Y. Only embedded should say N here.
884 245
885 config HAVE_SMP !! 246 config HOTPLUG_CPU
886 bool !! 247 bool "Support for hot-pluggable CPUs"
>> 248 depends on SPARC64 && SMP
887 help 249 help
888 This option should be selected by ma !! 250 Say Y here to experiment with turning CPUs off and on. CPUs
889 capable CPU. !! 251 can be controlled through /sys/devices/system/cpu/cpu#.
>> 252 Say N if you want to disable CPU hotplug.
890 253
891 The only effect of this option is to !! 254 if SPARC64
892 options available to the user for co !! 255 source "drivers/cpufreq/Kconfig"
>> 256 endif
893 257
894 config SMP !! 258 config US3_MC
895 bool "Symmetric Multi-Processing" !! 259 tristate "UltraSPARC-III Memory Controller driver"
896 depends on CPU_V6K || CPU_V7 !! 260 depends on SPARC64
897 depends on HAVE_SMP !! 261 default y
898 depends on MMU || ARM_MPU <<
899 select IRQ_WORK <<
900 help 262 help
901 This enables support for systems wit !! 263 This adds a driver for the UltraSPARC-III memory controller.
902 a system with only one CPU, say N. I !! 264 Loading this driver allows exact mnemonic strings to be
903 than one CPU, say Y. !! 265 printed in the event of a memory error, so that the faulty DIMM
>> 266 on the motherboard can be matched to the error.
904 267
905 If you say N here, the kernel will r !! 268 If in doubt, say Y, as this information can be very useful.
906 machines, but will use only one CPU <<
907 you say Y here, the kernel will run <<
908 uniprocessor machines. On a uniproce <<
909 will run faster if you say N here. <<
910 269
911 See also <file:Documentation/arch/x8 !! 270 # Global things across all Sun machines.
912 <file:Documentation/admin-guide/lock !! 271 config GENERIC_LOCKBREAK
913 <http://tldp.org/HOWTO/SMP-HOWTO.htm !! 272 bool
>> 273 default y
>> 274 depends on SPARC64 && SMP && PREEMPTION
914 275
915 If you don't know what to do here, s !! 276 config NUMA
>> 277 bool "NUMA support"
>> 278 depends on SPARC64 && SMP
916 279
917 config SMP_ON_UP !! 280 config NODES_SHIFT
918 bool "Allow booting SMP kernel on unip !! 281 int "Maximum NUMA Nodes (as a power of 2)"
919 depends on SMP && MMU !! 282 range 4 5 if SPARC64
920 default y !! 283 default "5"
>> 284 depends on NEED_MULTIPLE_NODES
921 help 285 help
922 SMP kernels contain instructions whi !! 286 Specify the maximum number of NUMA Nodes available on the target
923 Enabling this option allows the kern !! 287 system. Increases memory reserved to accommodate various tables.
924 these instructions safe. Disabling <<
925 savings. <<
926 288
927 If you don't know what to do here, s !! 289 config ARCH_SPARSEMEM_ENABLE
>> 290 def_bool y if SPARC64
>> 291 select SPARSEMEM_VMEMMAP_ENABLE
928 292
>> 293 config ARCH_SPARSEMEM_DEFAULT
>> 294 def_bool y if SPARC64
929 295
930 config CURRENT_POINTER_IN_TPIDRURO !! 296 config FORCE_MAX_ZONEORDER
931 def_bool y !! 297 int "Maximum zone order"
932 depends on CPU_32v6K && !CPU_V6 !! 298 default "13"
>> 299 help
>> 300 The kernel memory allocator divides physically contiguous memory
>> 301 blocks into "zones", where each zone is a power of two number of
>> 302 pages. This option selects the largest power of two that the kernel
>> 303 keeps in the memory allocator. If you need to allocate very large
>> 304 blocks of physically contiguous memory, then you may need to
>> 305 increase this value.
933 306
934 config IRQSTACKS !! 307 This config option is actually maximum order plus one. For example,
935 def_bool y !! 308 a value of 13 means that the largest free memory block is 2^12 pages.
936 select HAVE_IRQ_EXIT_ON_IRQ_STACK !! 309
937 select HAVE_SOFTIRQ_ON_OWN_STACK !! 310 if SPARC64
>> 311 source "kernel/power/Kconfig"
>> 312 endif
938 313
939 config ARM_CPU_TOPOLOGY !! 314 config SCHED_SMT
940 bool "Support cpu topology definition" !! 315 bool "SMT (Hyperthreading) scheduler support"
941 depends on SMP && CPU_V7 !! 316 depends on SPARC64 && SMP
942 default y 317 default y
943 help 318 help
944 Support ARM cpu topology definition. !! 319 SMT scheduler support improves the CPU scheduler's decision making
945 affinity between processors which is !! 320 when dealing with SPARC cpus at a cost of slightly increased overhead
946 topology of an ARM System. !! 321 in some places. If unsure say N here.
947 322
948 config SCHED_MC 323 config SCHED_MC
949 bool "Multi-core scheduler support" 324 bool "Multi-core scheduler support"
950 depends on ARM_CPU_TOPOLOGY !! 325 depends on SPARC64 && SMP
>> 326 default y
951 help 327 help
952 Multi-core scheduler support improve 328 Multi-core scheduler support improves the CPU scheduler's decision
953 making when dealing with multi-core 329 making when dealing with multi-core CPU chips at a cost of slightly
954 increased overhead in some places. I 330 increased overhead in some places. If unsure say N here.
955 331
956 config SCHED_SMT !! 332 config CMDLINE_BOOL
957 bool "SMT scheduler support" !! 333 bool "Default bootloader kernel arguments"
958 depends on ARM_CPU_TOPOLOGY !! 334 depends on SPARC64
959 help <<
960 Improves the CPU scheduler's decisio <<
961 MultiThreading at a cost of slightly <<
962 places. If unsure say N here. <<
963 335
964 config HAVE_ARM_SCU !! 336 config CMDLINE
965 bool !! 337 string "Initial kernel command string"
>> 338 depends on CMDLINE_BOOL
>> 339 default "console=ttyS0,9600 root=/dev/sda1"
966 help 340 help
967 This option enables support for the !! 341 Say Y here if you want to be able to pass default arguments to
>> 342 the kernel. This will be overridden by the bootloader, if you
>> 343 use one (such as SILO). This is most useful if you want to boot
>> 344 a kernel from TFTP, and want default options to be available
>> 345 with having them passed on the command line.
968 346
969 config HAVE_ARM_ARCH_TIMER !! 347 NOTE: This option WILL override the PROM bootargs setting!
970 bool "Architected timer support" <<
971 depends on CPU_V7 <<
972 select ARM_ARCH_TIMER <<
973 help <<
974 This option enables support for the <<
975 348
976 config HAVE_ARM_TWD !! 349 config SUN_PM
977 bool 350 bool
>> 351 default y if SPARC32
978 help 352 help
979 This options enables support for the !! 353 Enable power management and CPU standby features on supported
>> 354 SPARC platforms.
980 355
981 config MCPM !! 356 config SPARC_LED
982 bool "Multi-Cluster Power Management" !! 357 tristate "Sun4m LED driver"
983 depends on CPU_V7 && SMP !! 358 depends on SPARC32
984 help 359 help
985 This option provides the common powe !! 360 This driver toggles the front-panel LED on sun4m systems
986 for (multi-)cluster based systems, s !! 361 in a user-specifiable manner. Its state can be probed
987 systems. !! 362 by reading /proc/led and its blinking mode can be changed
>> 363 via writes to /proc/led
988 364
989 config MCPM_QUAD_CLUSTER !! 365 config SERIAL_CONSOLE
990 bool 366 bool
991 depends on MCPM !! 367 depends on SPARC32
992 help !! 368 default y
993 To avoid wasting resources unnecessa <<
994 to 2 clusters by default. <<
995 Platforms with 3 or 4 clusters that <<
996 option to allow the additional clust <<
997 <<
998 config BIG_LITTLE <<
999 bool "big.LITTLE support (Experimental <<
1000 depends on CPU_V7 && SMP <<
1001 select MCPM <<
1002 help <<
1003 This option enables support selecti <<
1004 system architecture. <<
1005 <<
1006 config BL_SWITCHER <<
1007 bool "big.LITTLE switcher support" <<
1008 depends on BIG_LITTLE && MCPM && HOTP <<
1009 select CPU_PM <<
1010 help <<
1011 The big.LITTLE "switcher" provides <<
1012 transparently handle transition bet <<
1013 and a cluster of A7's in a big.LITT <<
1014 <<
1015 config BL_SWITCHER_DUMMY_IF <<
1016 tristate "Simple big.LITTLE switcher <<
1017 depends on BL_SWITCHER && DEBUG_KERNE <<
1018 help <<
1019 This is a simple and dummy char dev <<
1020 the big.LITTLE switcher core code. <<
1021 debugging purposes only. <<
1022 <<
1023 choice <<
1024 prompt "Memory split" <<
1025 depends on MMU <<
1026 default VMSPLIT_3G <<
1027 help <<
1028 Select the desired split between ke <<
1029 <<
1030 If you are not absolutely sure what <<
1031 option alone! <<
1032 <<
1033 config VMSPLIT_3G <<
1034 bool "3G/1G user/kernel split <<
1035 config VMSPLIT_3G_OPT <<
1036 depends on !ARM_LPAE <<
1037 bool "3G/1G user/kernel split <<
1038 config VMSPLIT_2G <<
1039 bool "2G/2G user/kernel split <<
1040 config VMSPLIT_1G <<
1041 bool "1G/3G user/kernel split <<
1042 endchoice <<
1043 <<
1044 config PAGE_OFFSET <<
1045 hex <<
1046 default PHYS_OFFSET if !MMU <<
1047 default 0x40000000 if VMSPLIT_1G <<
1048 default 0x80000000 if VMSPLIT_2G <<
1049 default 0xB0000000 if VMSPLIT_3G_OPT <<
1050 default 0xC0000000 <<
1051 <<
1052 config KASAN_SHADOW_OFFSET <<
1053 hex <<
1054 depends on KASAN <<
1055 default 0x1f000000 if PAGE_OFFSET=0x4 <<
1056 default 0x5f000000 if PAGE_OFFSET=0x8 <<
1057 default 0x9f000000 if PAGE_OFFSET=0xC <<
1058 default 0x8f000000 if PAGE_OFFSET=0xB <<
1059 default 0xffffffff <<
1060 <<
1061 config NR_CPUS <<
1062 int "Maximum number of CPUs (2-32)" <<
1063 range 2 16 if DEBUG_KMAP_LOCAL <<
1064 range 2 32 if !DEBUG_KMAP_LOCAL <<
1065 depends on SMP <<
1066 default "4" <<
1067 help 369 help
1068 The maximum number of CPUs that the !! 370 If you say Y here, it will be possible to use a serial port as the
1069 Up to 32 CPUs can be supported, or !! 371 system console (the system console is the device which receives all
1070 debugging is enabled, which uses ha !! 372 kernel messages and warnings and which allows logins in single user
1071 slots as guard regions. !! 373 mode). This could be useful if some terminal or printer is connected
>> 374 to that serial port.
1072 375
1073 config HOTPLUG_CPU !! 376 Even if you say Y here, the currently visible virtual console
1074 bool "Support for hot-pluggable CPUs" !! 377 (/dev/tty0) will still be used as the system console by default, but
1075 depends on SMP !! 378 you can alter that using a kernel command line option such as
1076 select GENERIC_IRQ_MIGRATION !! 379 "console=ttyS1". (Try "man bootparam" or see the documentation of
1077 help !! 380 your boot loader (silo) about how to pass options to the kernel at
1078 Say Y here to experiment with turni !! 381 boot time.)
1079 can be controlled through /sys/devi <<
1080 382
1081 config ARM_PSCI !! 383 If you don't have a graphics card installed and you say Y here, the
1082 bool "Support for the ARM Power State !! 384 kernel will automatically use the first serial line, /dev/ttyS0, as
1083 depends on HAVE_ARM_SMCCC !! 385 system console.
1084 select ARM_PSCI_FW <<
1085 help <<
1086 Say Y here if you want Linux to com <<
1087 implementing the PSCI specification <<
1088 management operations described in <<
1089 0022A ("Power State Coordination In <<
1090 ARM processors"). <<
1091 <<
1092 config HZ_FIXED <<
1093 int <<
1094 default 128 if SOC_AT91RM9200 <<
1095 default 0 <<
1096 <<
1097 choice <<
1098 depends on HZ_FIXED = 0 <<
1099 prompt "Timer frequency" <<
1100 <<
1101 config HZ_100 <<
1102 bool "100 Hz" <<
1103 <<
1104 config HZ_200 <<
1105 bool "200 Hz" <<
1106 <<
1107 config HZ_250 <<
1108 bool "250 Hz" <<
1109 <<
1110 config HZ_300 <<
1111 bool "300 Hz" <<
1112 <<
1113 config HZ_500 <<
1114 bool "500 Hz" <<
1115 <<
1116 config HZ_1000 <<
1117 bool "1000 Hz" <<
1118 <<
1119 endchoice <<
1120 <<
1121 config HZ <<
1122 int <<
1123 default HZ_FIXED if HZ_FIXED != 0 <<
1124 default 100 if HZ_100 <<
1125 default 200 if HZ_200 <<
1126 default 250 if HZ_250 <<
1127 default 300 if HZ_300 <<
1128 default 500 if HZ_500 <<
1129 default 1000 <<
1130 <<
1131 config SCHED_HRTICK <<
1132 def_bool HIGH_RES_TIMERS <<
1133 <<
1134 config THUMB2_KERNEL <<
1135 bool "Compile the kernel in Thumb-2 m <<
1136 depends on (CPU_V7 || CPU_V7M) && !CP <<
1137 default y if CPU_THUMBONLY <<
1138 select ARM_UNWIND <<
1139 help <<
1140 By enabling this option, the kernel <<
1141 Thumb-2 mode. <<
1142 386
1143 If unsure, say N. 387 If unsure, say N.
1144 388
1145 config ARM_PATCH_IDIV !! 389 config SPARC_LEON
1146 bool "Runtime patch udiv/sdiv instruc !! 390 bool "Sparc Leon processor family"
1147 depends on CPU_32v7 !! 391 depends on SPARC32
1148 default y !! 392 select USB_EHCI_BIG_ENDIAN_MMIO
1149 help !! 393 select USB_EHCI_BIG_ENDIAN_DESC
1150 The ARM compiler inserts calls to _ !! 394 select USB_UHCI_BIG_ENDIAN_MMIO
1151 __aeabi_uidiv() when it needs to pe !! 395 select USB_UHCI_BIG_ENDIAN_DESC
1152 and unsigned integers. Some v7 CPUs !! 396 help
1153 and udiv instructions that can be u !! 397 If you say Y here if you are running on a SPARC-LEON processor.
1154 functions. !! 398 The LEON processor is a synthesizable VHDL model of the
1155 !! 399 SPARC-v8 standard. LEON is part of the GRLIB collection of
1156 Enabling this option allows the ker !! 400 IP cores that are distributed under GPL. GRLIB can be downloaded
1157 replace the first two instructions !! 401 from www.gaisler.com. You can download a sparc-linux cross-compilation
1158 with the sdiv or udiv plus "bx lr" !! 402 toolchain at www.gaisler.com.
1159 it is running on supports them. Typ !! 403
1160 and less power intensive than runni !! 404 if SPARC_LEON
1161 code to do integer division. !! 405 menu "U-Boot options"
1162 !! 406
1163 config AEABI !! 407 config UBOOT_LOAD_ADDR
1164 bool "Use the ARM EABI to compile the !! 408 hex "uImage Load Address"
1165 !CPU_V7M && !CPU_V6 && !CPU_V !! 409 default 0x40004000
1166 default CPU_V7 || CPU_V7M || CPU_V6 | !! 410 help
1167 help !! 411 U-Boot kernel load address, the address in physical address space
1168 This option allows for the kernel t !! 412 where u-boot will place the Linux kernel before booting it.
1169 ARM ABI (aka EABI). This is only u !! 413 This address is normally the base address of main memory + 0x4000.
1170 space environment that is also comp !! 414
1171 !! 415 config UBOOT_FLASH_ADDR
1172 Since there are major incompatibili !! 416 hex "uImage.o Load Address"
1173 EABI, especially with regard to str !! 417 default 0x00080000
1174 option also changes the kernel sysc !! 418 help
1175 disambiguate both ABIs and allow fo !! 419 Optional setting only affecting the uImage.o ELF-image used to
1176 (selected with CONFIG_OABI_COMPAT). !! 420 download the uImage file to the target using a ELF-loader other than
1177 !! 421 U-Boot. It may for example be used to download an uImage to FLASH with
1178 To use this you need GCC version 4. !! 422 the GRMON utility before even starting u-boot.
1179 !! 423
1180 config OABI_COMPAT !! 424 config UBOOT_ENTRY_ADDR
1181 bool "Allow old ABI binaries to run w !! 425 hex "uImage Entry Address"
1182 depends on AEABI && !THUMB2_KERNEL !! 426 default 0xf0004000
1183 help <<
1184 This option preserves the old sysca <<
1185 new (ARM EABI) one. It also provide <<
1186 intercept syscalls that have struct <<
1187 in memory differs between the legac <<
1188 (only for non "thumb" binaries). Th <<
1189 overhead to all syscalls and produc <<
1190 <<
1191 The seccomp filter system will not <<
1192 selected, since there is no way yet <<
1193 between calling conventions during <<
1194 <<
1195 If you know you'll be using only pu <<
1196 can say N here. If this option is n <<
1197 to execute a legacy ABI binary then <<
1198 UNPREDICTABLE (in fact it can be pr <<
1199 at all). If in doubt say N. <<
1200 <<
1201 config ARCH_SELECT_MEMORY_MODEL <<
1202 def_bool y <<
1203 <<
1204 config ARCH_FLATMEM_ENABLE <<
1205 def_bool !(ARCH_RPC || ARCH_SA1100) <<
1206 <<
1207 config ARCH_SPARSEMEM_ENABLE <<
1208 def_bool !ARCH_FOOTBRIDGE <<
1209 select SPARSEMEM_STATIC if SPARSEMEM <<
1210 <<
1211 config HIGHMEM <<
1212 bool "High Memory Support" <<
1213 depends on MMU <<
1214 select KMAP_LOCAL <<
1215 select KMAP_LOCAL_NON_LINEAR_PTE_ARRA <<
1216 help <<
1217 The address space of ARM processors <<
1218 and it has to accommodate user addr <<
1219 space as well as some memory mapped <<
1220 have a large amount of physical mem <<
1221 memory can be "permanently mapped" <<
1222 memory that is not permanently mapp <<
1223 <<
1224 Depending on the selected kernel/us <<
1225 vmalloc space and actual amount of <<
1226 option which should result in a sli <<
1227 <<
1228 If unsure, say n. <<
1229 <<
1230 config HIGHPTE <<
1231 bool "Allocate 2nd-level pagetables f <<
1232 depends on HIGHMEM <<
1233 default y <<
1234 help <<
1235 The VM uses one page of physical me <<
1236 For systems with a lot of processes <<
1237 precious low memory, eventually lea <<
1238 consumed by page tables. Setting t <<
1239 user-space 2nd level page tables to <<
1240 <<
1241 config ARM_PAN <<
1242 bool "Enable privileged no-access" <<
1243 depends on MMU <<
1244 default y <<
1245 help <<
1246 Increase kernel security by ensurin <<
1247 are unable to access userspace addr <<
1248 use-after-free bugs becoming an exp <<
1249 by ensuring that magic values (such <<
1250 fault when dereferenced. <<
1251 <<
1252 The implementation uses CPU domains <<
1253 disabling of TTBR0 page table walks <<
1254 <<
1255 config CPU_SW_DOMAIN_PAN <<
1256 def_bool y <<
1257 depends on ARM_PAN && !ARM_LPAE <<
1258 help <<
1259 Enable use of CPU domains to implem <<
1260 <<
1261 CPUs with low-vector mappings use a <<
1262 Their lower 1MB needs to remain acc <<
1263 the remainder of userspace will bec <<
1264 <<
1265 config CPU_TTBR0_PAN <<
1266 def_bool y <<
1267 depends on ARM_PAN && ARM_LPAE <<
1268 help 427 help
1269 Enable privileged no-access by disa !! 428 Do not change this unless you know what you're doing. This is
1270 running in kernel mode. !! 429 hardcoded by the SPARC32 and LEON port.
1271 <<
1272 config HW_PERF_EVENTS <<
1273 def_bool y <<
1274 depends on ARM_PMU <<
1275 <<
1276 config ARM_MODULE_PLTS <<
1277 bool "Use PLTs to allow module memory <<
1278 depends on MODULES <<
1279 select KASAN_VMALLOC if KASAN <<
1280 default y <<
1281 help <<
1282 Allocate PLTs when loading modules <<
1283 targets are too far away for their <<
1284 in the instructions themselves can <<
1285 module's PLT. This allows modules t <<
1286 vmalloc area after the dedicated mo <<
1287 exhausted. The modules will use sli <<
1288 rounding up to page size, the actua <<
1289 the same. <<
1290 <<
1291 Disabling this is usually safe for <<
1292 configurations. If unsure, say y. <<
1293 <<
1294 config ARCH_FORCE_MAX_ORDER <<
1295 int "Order of maximal physically cont <<
1296 default "11" if SOC_AM33XX <<
1297 default "8" if SA1111 <<
1298 default "10" <<
1299 help <<
1300 The kernel page allocator limits th <<
1301 contiguous allocations. The limit i <<
1302 defines the maximal power of two of <<
1303 allocated as a single contiguous bl <<
1304 overriding the default setting when <<
1305 large blocks of physically contiguo <<
1306 <<
1307 Don't change if unsure. <<
1308 <<
1309 config ALIGNMENT_TRAP <<
1310 def_bool CPU_CP15_MMU <<
1311 select HAVE_PROC_CPU if PROC_FS <<
1312 help <<
1313 ARM processors cannot fetch/store i <<
1314 naturally aligned on the bus, i.e., <<
1315 address divisible by 4. On 32-bit A <<
1316 fetch/store instructions will be em <<
1317 here, which has a severe performanc <<
1318 correct operation of some network p <<
1319 configuration it is safe to say N, <<
1320 <<
1321 config UACCESS_WITH_MEMCPY <<
1322 bool "Use kernel mem{cpy,set}() for { <<
1323 depends on MMU <<
1324 default y if CPU_FEROCEON <<
1325 help <<
1326 Implement faster copy_to_user and c <<
1327 cores where a 8-word STM instructio <<
1328 memory write throughput than a sequ <<
1329 <<
1330 A possible side effect is a slight <<
1331 between threads sharing the same ad <<
1332 such copy operations with large buf <<
1333 <<
1334 However, if the CPU data cache is u <<
1335 this option is unlikely to provide <<
1336 <<
1337 config PARAVIRT <<
1338 bool "Enable paravirtualization code" <<
1339 help <<
1340 This changes the kernel so it can m <<
1341 under a hypervisor, potentially imp <<
1342 over full virtualization. <<
1343 <<
1344 config PARAVIRT_TIME_ACCOUNTING <<
1345 bool "Paravirtual steal time accounti <<
1346 select PARAVIRT <<
1347 help <<
1348 Select this option to enable fine g <<
1349 accounting. Time spent executing ot <<
1350 the current vCPU is discounted from <<
1351 that, there can be a small performa <<
1352 <<
1353 If in doubt, say N here. <<
1354 <<
1355 config XEN_DOM0 <<
1356 def_bool y <<
1357 depends on XEN <<
1358 <<
1359 config XEN <<
1360 bool "Xen guest support on ARM" <<
1361 depends on ARM && AEABI && OF <<
1362 depends on CPU_V7 && !CPU_V6 <<
1363 depends on !GENERIC_ATOMIC64 <<
1364 depends on MMU <<
1365 select ARCH_DMA_ADDR_T_64BIT <<
1366 select ARM_PSCI <<
1367 select SWIOTLB <<
1368 select SWIOTLB_XEN <<
1369 select PARAVIRT <<
1370 help <<
1371 Say Y if you want to run Linux in a <<
1372 <<
1373 config CC_HAVE_STACKPROTECTOR_TLS <<
1374 def_bool $(cc-option,-mtp=cp15 -mstac <<
1375 <<
1376 config STACKPROTECTOR_PER_TASK <<
1377 bool "Use a unique stack canary value <<
1378 depends on STACKPROTECTOR && CURRENT_ <<
1379 depends on GCC_PLUGINS || CC_HAVE_STA <<
1380 select GCC_PLUGIN_ARM_SSP_PER_TASK if <<
1381 default y <<
1382 help <<
1383 Due to the fact that GCC uses an or <<
1384 which to load the value of the stac <<
1385 change at reboot time on SMP system <<
1386 kernel's address space are forced t <<
1387 the entire duration that the system <<
1388 430
1389 Enable this option to switch to a d !! 431 This is the virtual address u-boot jumps to when booting the Linux
1390 different canary value for each tas !! 432 Kernel.
1391 433
1392 endmenu 434 endmenu
>> 435 endif
1393 436
1394 menu "Boot options" !! 437 endmenu
1395 <<
1396 config USE_OF <<
1397 bool "Flattened Device Tree support" <<
1398 select IRQ_DOMAIN <<
1399 select OF <<
1400 help <<
1401 Include support for flattened devic <<
1402 <<
1403 config ARCH_WANT_FLAT_DTB_INSTALL <<
1404 def_bool y <<
1405 438
1406 config ATAGS !! 439 menu "Bus options (PCI etc.)"
1407 bool "Support for the traditional ATA !! 440 config SBUS
>> 441 bool
1408 default y 442 default y
1409 help <<
1410 This is the traditional way of pass <<
1411 time. If you are solely relying on <<
1412 the ARM_ATAG_DTB_COMPAT option) the <<
1413 to remove ATAGS support from your k <<
1414 <<
1415 config DEPRECATED_PARAM_STRUCT <<
1416 bool "Provide old way to pass kernel <<
1417 depends on ATAGS <<
1418 help <<
1419 This was deprecated in 2001 and ann <<
1420 Some old boot loaders still use thi <<
1421 <<
1422 # Compressed boot loader in ROM. Yes, we rea <<
1423 # TEXT and BSS so we preserve their values in <<
1424 config ZBOOT_ROM_TEXT <<
1425 hex "Compressed ROM boot loader base <<
1426 default 0x0 <<
1427 help <<
1428 The physical address at which the R <<
1429 placed in the target. Platforms wh <<
1430 ROM-able zImage formats normally se <<
1431 value in their defconfig file. <<
1432 <<
1433 If ZBOOT_ROM is not enabled, this h <<
1434 <<
1435 config ZBOOT_ROM_BSS <<
1436 hex "Compressed ROM boot loader BSS a <<
1437 default 0x0 <<
1438 help <<
1439 The base address of an area of read <<
1440 for the ROM-able zImage which must <<
1441 decompressor is running. It must be <<
1442 entire decompressed kernel plus an <<
1443 Platforms which normally make use o <<
1444 normally set this to a suitable val <<
1445 <<
1446 If ZBOOT_ROM is not enabled, this h <<
1447 <<
1448 config ZBOOT_ROM <<
1449 bool "Compressed boot loader in ROM/f <<
1450 depends on ZBOOT_ROM_TEXT != ZBOOT_RO <<
1451 depends on !ARM_APPENDED_DTB && !XIP_ <<
1452 help <<
1453 Say Y here if you intend to execute <<
1454 (zImage) directly from ROM or flash <<
1455 <<
1456 config ARM_APPENDED_DTB <<
1457 bool "Use appended device tree blob t <<
1458 depends on OF <<
1459 help <<
1460 With this option, the boot code wil <<
1461 (DTB) appended to zImage <<
1462 (e.g. cat zImage <filename>.dtb > z <<
1463 <<
1464 This is meant as a backward compati <<
1465 systems with a bootloader that can' <<
1466 the documented boot protocol using <<
1467 <<
1468 Beware that there is very little in <<
1469 this option being confused by lefto <<
1470 look like a DTB header after a rebo <<
1471 to zImage. Do not leave this optio <<
1472 if you don't intend to always appen <<
1473 location into r2 of a bootloader pr <<
1474 to this option. <<
1475 <<
1476 config ARM_ATAG_DTB_COMPAT <<
1477 bool "Supplement the appended DTB wit <<
1478 depends on ARM_APPENDED_DTB <<
1479 help <<
1480 Some old bootloaders can't be updat <<
1481 they provide ATAGs with memory conf <<
1482 the kernel cmdline string, etc. Su <<
1483 provided by the bootloader and can' <<
1484 DTB. To allow a device tree enable <<
1485 bootloaders, this option allows zIm <<
1486 from the ATAG list and store it at <<
1487 <<
1488 choice <<
1489 prompt "Kernel command line type" <<
1490 depends on ARM_ATAG_DTB_COMPAT <<
1491 default ARM_ATAG_DTB_COMPAT_CMDLINE_F <<
1492 <<
1493 config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTL <<
1494 bool "Use bootloader kernel arguments <<
1495 help <<
1496 Uses the command-line options passe <<
1497 the device tree bootargs property. <<
1498 any, the device tree bootargs prope <<
1499 443
1500 config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND !! 444 config SBUSCHAR
1501 bool "Extend with bootloader kernel a !! 445 bool
1502 help !! 446 default y
1503 The command-line arguments provided <<
1504 appended to the the device tree boo <<
1505 <<
1506 endchoice <<
1507 447
1508 config CMDLINE !! 448 config SUN_LDOMS
1509 string "Default kernel command string !! 449 bool "Sun Logical Domains support"
1510 default "" !! 450 depends on SPARC64
1511 help 451 help
1512 On some architectures (e.g. CATS), !! 452 Say Y here is you want to support virtual devices via
1513 for the boot loader to pass argumen !! 453 Logical Domains.
1514 architectures, you should supply so <<
1515 time by entering them here. As a mi <<
1516 memory size and the root device (e. <<
1517 <<
1518 choice <<
1519 prompt "Kernel command line type" <<
1520 depends on CMDLINE != "" <<
1521 default CMDLINE_FROM_BOOTLOADER <<
1522 <<
1523 config CMDLINE_FROM_BOOTLOADER <<
1524 bool "Use bootloader kernel arguments <<
1525 help <<
1526 Uses the command-line options passe <<
1527 the boot loader doesn't provide any <<
1528 string provided in CMDLINE will be <<
1529 <<
1530 config CMDLINE_EXTEND <<
1531 bool "Extend bootloader kernel argume <<
1532 help <<
1533 The command-line arguments provided <<
1534 appended to the default kernel comm <<
1535 <<
1536 config CMDLINE_FORCE <<
1537 bool "Always use the default kernel c <<
1538 help <<
1539 Always use the default kernel comma <<
1540 loader passes other arguments to th <<
1541 This is useful if you cannot or don <<
1542 command-line options your boot load <<
1543 endchoice <<
1544 <<
1545 config XIP_KERNEL <<
1546 bool "Kernel Execute-In-Place from RO <<
1547 depends on !ARM_LPAE && !ARCH_MULTIPL <<
1548 depends on !ARM_PATCH_IDIV && !ARM_PA <<
1549 help <<
1550 Execute-In-Place allows the kernel <<
1551 directly addressable by the CPU, su <<
1552 space since the text section of the <<
1553 to RAM. Read-write sections, such <<
1554 are still copied to RAM. The XIP k <<
1555 it has to run directly from flash, <<
1556 store it. The flash address used t <<
1557 and for storing it, is configuratio <<
1558 say Y here, you must know the prope <<
1559 store the kernel image depending on <<
1560 <<
1561 Also note that the make target beco <<
1562 "make zImage" or "make Image". The <<
1563 ROM memory will be arch/arm/boot/xi <<
1564 454
1565 If unsure, say N. !! 455 config PCIC_PCI
1566 !! 456 bool
1567 config XIP_PHYS_ADDR !! 457 depends on PCI && SPARC32 && !SPARC_LEON
1568 hex "XIP Kernel Physical Location" <<
1569 depends on XIP_KERNEL <<
1570 default "0x00080000" <<
1571 help <<
1572 This is the physical address in you <<
1573 be linked for and stored to. This <<
1574 own flash usage. <<
1575 <<
1576 config XIP_DEFLATED_DATA <<
1577 bool "Store kernel .data section comp <<
1578 depends on XIP_KERNEL <<
1579 select ZLIB_INFLATE <<
1580 help <<
1581 Before the kernel is actually execu <<
1582 copied to RAM from ROM. This option <<
1583 in compressed form and decompressed <<
1584 copied, saving some precious ROM sp <<
1585 slightly longer boot delay. <<
1586 <<
1587 config ARCH_SUPPORTS_KEXEC <<
1588 def_bool (!SMP || PM_SLEEP_SMP) && MM <<
1589 <<
1590 config ATAGS_PROC <<
1591 bool "Export atags in procfs" <<
1592 depends on ATAGS && KEXEC <<
1593 default y 458 default y
1594 help <<
1595 Should the atags used to boot the k <<
1596 file in procfs. Useful with kexec. <<
1597 <<
1598 config ARCH_SUPPORTS_CRASH_DUMP <<
1599 def_bool y <<
1600 <<
1601 config AUTO_ZRELADDR <<
1602 bool "Auto calculation of the decompr <<
1603 default !(ARCH_FOOTBRIDGE || ARCH_RPC <<
1604 help <<
1605 ZRELADDR is the physical address wh <<
1606 image will be placed. If AUTO_ZRELA <<
1607 will be determined at run-time, eit <<
1608 with 0xf8000000, or, if invalid, fr <<
1609 This assumes the zImage being place <<
1610 start of memory. <<
1611 <<
1612 config EFI_STUB <<
1613 bool <<
1614 <<
1615 config EFI <<
1616 bool "UEFI runtime support" <<
1617 depends on OF && !CPU_BIG_ENDIAN && M <<
1618 select UCS2_STRING <<
1619 select EFI_PARAMS_FROM_FDT <<
1620 select EFI_STUB <<
1621 select EFI_GENERIC_STUB <<
1622 select EFI_RUNTIME_WRAPPERS <<
1623 help <<
1624 This option provides support for ru <<
1625 by UEFI firmware (such as non-volat <<
1626 clock, and platform reset). A UEFI <<
1627 allow the kernel to be booted as an <<
1628 is only useful for kernels that may <<
1629 UEFI firmware. <<
1630 <<
1631 config DMI <<
1632 bool "Enable support for SMBIOS (DMI) <<
1633 depends on EFI <<
1634 default y <<
1635 help <<
1636 This enables SMBIOS/DMI feature for <<
1637 <<
1638 This option is only useful on syste <<
1639 However, even with this option, the <<
1640 continue to boot on existing non-UE <<
1641 <<
1642 NOTE: This does *NOT* enable or enc <<
1643 i.e., the the practice of identifyi <<
1644 decide whether certain workarounds <<
1645 firmware need to be enabled. This w <<
1646 to be enabled much earlier than we <<
1647 <<
1648 endmenu <<
1649 <<
1650 menu "CPU Power Management" <<
1651 <<
1652 source "drivers/cpufreq/Kconfig" <<
1653 <<
1654 source "drivers/cpuidle/Kconfig" <<
1655 459
1656 endmenu !! 460 config LEON_PCI
1657 !! 461 bool
1658 menu "Floating point emulation" !! 462 depends on PCI && SPARC_LEON
1659 !! 463 default y
1660 comment "At least one emulation must be selec <<
1661 <<
1662 config FPE_NWFPE <<
1663 bool "NWFPE math emulation" <<
1664 depends on (!AEABI || OABI_COMPAT) && <<
1665 help <<
1666 Say Y to include the NWFPE floating <<
1667 This is necessary to run most binar <<
1668 support floating point hardware so <<
1669 your machine has an FPA or floating <<
1670 <<
1671 You may say N here if you are going <<
1672 early in the bootup. <<
1673 464
1674 config FPE_NWFPE_XP !! 465 config SPARC_GRPCI1
1675 bool "Support extended precision" !! 466 bool "GRPCI Host Bridge Support"
1676 depends on FPE_NWFPE !! 467 depends on LEON_PCI
>> 468 default y
1677 help 469 help
1678 Say Y to include 80-bit support in !! 470 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
1679 emulator. Otherwise, only 32 and 6 !! 471 PCI host controller is typically found in GRLIB SPARC32/LEON
1680 Note that gcc does not generate 80- !! 472 systems. The driver has one property (all_pci_errors) controlled
1681 so in most cases this option only e !! 473 from the bootloader that makes the GRPCI to generate interrupts
1682 floating point emulator without any !! 474 on detected PCI Parity and System errors.
1683 <<
1684 You almost surely want to say N her <<
1685 475
1686 config FPE_FASTFPE !! 476 config SPARC_GRPCI2
1687 bool "FastFPE math emulation (EXPERIM !! 477 bool "GRPCI2 Host Bridge Support"
1688 depends on (!AEABI || OABI_COMPAT) && !! 478 depends on LEON_PCI
>> 479 default y
1689 help 480 help
1690 Say Y here to include the FAST floa !! 481 Say Y here to include the GRPCI2 Host Bridge Driver.
1691 This is an experimental much faster <<
1692 precision for the mantissa. It doe <<
1693 It is very simple, and approximatel <<
1694 <<
1695 It should be sufficient for most pr <<
1696 for scientific calculations, but yo <<
1697 If you do not feel you need a faste <<
1698 choose NWFPE. <<
1699 482
1700 config VFP !! 483 config SUN_OPENPROMFS
1701 bool "VFP-format floating point maths !! 484 tristate "Openprom tree appears in /proc/openprom"
1702 depends on CPU_V6 || CPU_V6K || CPU_A <<
1703 help 485 help
1704 Say Y to include VFP support code i !! 486 If you say Y, the OpenPROM device tree will be available as a
1705 if your hardware includes a VFP uni !! 487 virtual file system, which you can mount to /proc/openprom by "mount
>> 488 -t openpromfs none /proc/openprom".
1706 489
1707 Please see <file:Documentation/arch !! 490 To compile the /proc/openprom support as a module, choose M here: the
1708 release notes and additional status !! 491 module will be called openpromfs.
1709 492
1710 Say N if your target does not have !! 493 Only choose N if you know in advance that you will not need to modify
>> 494 OpenPROM settings on the running system.
1711 495
1712 config VFPv3 !! 496 # Makefile helpers
>> 497 config SPARC64_PCI
1713 bool 498 bool
1714 depends on VFP !! 499 default y
1715 default y if CPU_V7 !! 500 depends on SPARC64 && PCI
1716 <<
1717 config NEON <<
1718 bool "Advanced SIMD (NEON) Extension <<
1719 depends on VFPv3 && CPU_V7 <<
1720 help <<
1721 Say Y to include support code for N <<
1722 Extension. <<
1723 501
1724 config KERNEL_MODE_NEON !! 502 config SPARC64_PCI_MSI
1725 bool "Support for NEON in kernel mode !! 503 bool
1726 depends on NEON && AEABI !! 504 default y
1727 help !! 505 depends on SPARC64_PCI && PCI_MSI
1728 Say Y to include support for NEON i <<
1729 506
1730 endmenu 507 endmenu
1731 508
1732 menu "Power management options" !! 509 config COMPAT
1733 <<
1734 source "kernel/power/Kconfig" <<
1735 <<
1736 config ARCH_SUSPEND_POSSIBLE <<
1737 depends on CPU_ARM920T || CPU_ARM926T <<
1738 CPU_V6 || CPU_V6K || CPU_V7 | <<
1739 def_bool y <<
1740 <<
1741 config ARM_CPU_SUSPEND <<
1742 def_bool PM_SLEEP || BL_SWITCHER || A <<
1743 depends on ARCH_SUSPEND_POSSIBLE <<
1744 <<
1745 config ARCH_HIBERNATION_POSSIBLE <<
1746 bool 510 bool
1747 depends on MMU !! 511 depends on SPARC64
1748 default y if ARCH_SUSPEND_POSSIBLE !! 512 default y
>> 513 select COMPAT_BINFMT_ELF
>> 514 select HAVE_UID16
>> 515 select ARCH_WANT_OLD_COMPAT_IPC
>> 516 select COMPAT_OLD_SIGACTION
1749 517
1750 endmenu !! 518 config SYSVIPC_COMPAT
>> 519 bool
>> 520 depends on COMPAT && SYSVIPC
>> 521 default y
1751 522
1752 source "arch/arm/Kconfig.assembler" !! 523 source "drivers/sbus/char/Kconfig"
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