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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
a0ae9c7c | 2 | source "arch/powerpc/platforms/Kconfig.cputype" |
17e638bc | 3 | |
14cf11af PM |
4 | config PPC32 |
5 | bool | |
6 | default y if !PPC64 | |
7 | ||
234a71a7 | 8 | config 32BIT |
9 | bool | |
10 | default y if PPC32 | |
11 | ||
14cf11af PM |
12 | config 64BIT |
13 | bool | |
14 | default y if PPC64 | |
15 | ||
14cf11af PM |
16 | config MMU |
17 | bool | |
18 | default y | |
19 | ||
9fea59bd ME |
20 | config ARCH_MMAP_RND_BITS_MAX |
21 | # On Book3S 64, the default virtual address space for 64-bit processes | |
22 | # is 2^47 (128TB). As a maximum, allow randomisation to consume up to | |
23 | # 32T of address space (2^45), which should ensure a reasonable gap | |
24 | # between bottom-up and top-down allocations for applications that | |
25 | # consume "normal" amounts of address space. Book3S 64 only supports 64K | |
26 | # and 4K page sizes. | |
27 | default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) | |
28 | default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) | |
29 | # | |
30 | # On all other 64-bit platforms (currently only Book3E), the virtual | |
31 | # address space is 2^46 (64TB). Allow randomisation to consume up to 16T | |
32 | # of address space (2^44). Only 4K page sizes are supported. | |
33 | default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) | |
34 | # | |
35 | # For 32-bit, use the compat values, as they're the same. | |
36 | default ARCH_MMAP_RND_COMPAT_BITS_MAX | |
37 | ||
38 | config ARCH_MMAP_RND_BITS_MIN | |
39 | # Allow randomisation to consume up to 1GB of address space (2^30). | |
40 | default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) | |
41 | default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) | |
42 | # | |
43 | # For 32-bit, use the compat values, as they're the same. | |
44 | default ARCH_MMAP_RND_COMPAT_BITS_MIN | |
45 | ||
46 | config ARCH_MMAP_RND_COMPAT_BITS_MAX | |
47 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
48 | # Allow randomisation to consume up to 512MB of address space (2^29). | |
49 | default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) | |
50 | default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) | |
51 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) | |
52 | default 17 # 17 = 29 (512MB) - 12 (4K) | |
53 | ||
54 | config ARCH_MMAP_RND_COMPAT_BITS_MIN | |
55 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
56 | # Allow randomisation to consume up to 8MB of address space (2^23). | |
57 | default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) | |
58 | default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) | |
59 | default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) | |
60 | default 11 # 11 = 23 (8MB) - 12 (4K) | |
61 | ||
c2a7e818 | 62 | config HAVE_SETUP_PER_CPU_AREA |
e74e3962 TH |
63 | def_bool PPC64 |
64 | ||
c2a7e818 | 65 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
b32ef636 | 66 | def_bool PPC64 |
67 | ||
551b81f2 ME |
68 | config NR_IRQS |
69 | int "Number of virtual interrupt numbers" | |
859aefc5 | 70 | range 32 32768 |
551b81f2 ME |
71 | default "512" |
72 | help | |
73 | This defines the number of virtual interrupt numbers the kernel | |
74 | can manage. Virtual interrupt numbers are what you see in | |
75 | /proc/interrupts. If you configure your system to have too few, | |
76 | drivers will fail to load or worse - handle with care. | |
77 | ||
ddd703ca NP |
78 | config NMI_IPI |
79 | bool | |
2104180a | 80 | depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
ddd703ca NP |
81 | default y |
82 | ||
75eb767e NP |
83 | config PPC_WATCHDOG |
84 | bool | |
85 | depends on HARDLOCKUP_DETECTOR | |
86 | depends on HAVE_HARDLOCKUP_DETECTOR_ARCH | |
87 | default y | |
88 | help | |
89 | This is a placeholder when the powerpc hardlockup detector | |
90 | watchdog is selected (arch/powerpc/kernel/watchdog.c). It is | |
91 | seleted via the generic lockup detector menu which is why we | |
92 | have no standalone config option for it here. | |
93 | ||
fd3e0bbc CH |
94 | config STACKTRACE_SUPPORT |
95 | bool | |
96 | default y | |
97 | ||
945feb17 BH |
98 | config TRACE_IRQFLAGS_SUPPORT |
99 | bool | |
945feb17 BH |
100 | default y |
101 | ||
102 | config LOCKDEP_SUPPORT | |
103 | bool | |
104 | default y | |
105 | ||
95c354fe NP |
106 | config GENERIC_LOCKBREAK |
107 | bool | |
108 | default y | |
109 | depends on SMP && PREEMPT | |
110 | ||
e779b2f9 AM |
111 | config GENERIC_HWEIGHT |
112 | bool | |
113 | default y | |
114 | ||
14cf11af PM |
115 | config PPC |
116 | bool | |
117 | default y | |
a7d2475a ME |
118 | # |
119 | # Please keep this list sorted alphabetically. | |
120 | # | |
942fa985 | 121 | select ARCH_32BIT_OFF_T if PPC32 |
6bf752da | 122 | select ARCH_HAS_DEBUG_VIRTUAL |
a7d2475a | 123 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
a7d2475a | 124 | select ARCH_HAS_ELF_RANDOMIZE |
6974f0c4 | 125 | select ARCH_HAS_FORTIFY_SOURCE |
a7d2475a | 126 | select ARCH_HAS_GCOV_PROFILE_ALL |
fb0b0a73 | 127 | select ARCH_HAS_KCOV |
420af155 | 128 | select ARCH_HAS_MMIOWB if PPC64 |
ea8c64ac | 129 | select ARCH_HAS_PHYS_TO_DMA |
32ce3862 | 130 | select ARCH_HAS_PMEM_API if PPC64 |
3010a5ea | 131 | select ARCH_HAS_PTE_SPECIAL |
3ccfebed | 132 | select ARCH_HAS_MEMBARRIER_CALLBACKS |
abcff86d | 133 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC64 |
4ec591e5 | 134 | select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) |
a7d2475a | 135 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
6c44741d | 136 | select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64 |
a7d2475a | 137 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
c0742441 | 138 | select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64 |
a7d2475a | 139 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
350e88ba | 140 | select ARCH_KEEP_MEMBLOCK |
b7e7c37b | 141 | select ARCH_MIGHT_HAVE_PC_PARPORT |
c74e6d3d | 142 | select ARCH_MIGHT_HAVE_PC_SERIO |
4ec591e5 | 143 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
a7d2475a | 144 | select ARCH_SUPPORTS_ATOMIC_RMW |
a7d2475a ME |
145 | select ARCH_USE_BUILTIN_BSWAP |
146 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
147 | select ARCH_WANT_IPC_PARSE_VERSION | |
77e58496 | 148 | select ARCH_WEAK_RELEASE_ACQUIRE |
d812c0e1 | 149 | select BINFMT_ELF |
a7d2475a ME |
150 | select BUILDTIME_EXTABLE_SORT |
151 | select CLONE_BACKWARDS | |
152 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN | |
0c0c5230 | 153 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
a7d2475a ME |
154 | select EDAC_ATOMIC_SCRUB |
155 | select EDAC_SUPPORT | |
156 | select GENERIC_ATOMIC64 if PPC32 | |
157 | select GENERIC_CLOCKEVENTS | |
158 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP | |
159 | select GENERIC_CMOS_UPDATE | |
160 | select GENERIC_CPU_AUTOPROBE | |
179ab1cb | 161 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
a7d2475a ME |
162 | select GENERIC_IRQ_SHOW |
163 | select GENERIC_IRQ_SHOW_LEVEL | |
eb01d42a | 164 | select GENERIC_PCI_IOMAP if PCI |
a7d2475a ME |
165 | select GENERIC_SMP_IDLE_THREAD |
166 | select GENERIC_STRNCPY_FROM_USER | |
167 | select GENERIC_STRNLEN_USER | |
d4cfb113 | 168 | select GENERIC_TIME_VSYSCALL |
a7d2475a | 169 | select HAVE_ARCH_AUDITSYSCALL |
a7d2475a | 170 | select HAVE_ARCH_JUMP_LABEL |
2edb16ef | 171 | select HAVE_ARCH_KASAN if PPC32 |
a7d2475a | 172 | select HAVE_ARCH_KGDB |
9fea59bd ME |
173 | select HAVE_ARCH_MMAP_RND_BITS |
174 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
20e07af7 | 175 | select HAVE_ARCH_NVRAM_OPS |
a7d2475a ME |
176 | select HAVE_ARCH_SECCOMP_FILTER |
177 | select HAVE_ARCH_TRACEHOOK | |
178 | select HAVE_CBPF_JIT if !PPC64 | |
bf6cbd0c ME |
179 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) |
180 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) | |
a7d2475a ME |
181 | select HAVE_CONTEXT_TRACKING if PPC64 |
182 | select HAVE_DEBUG_KMEMLEAK | |
183 | select HAVE_DEBUG_STACKOVERFLOW | |
2b79d696 | 184 | select HAVE_DYNAMIC_FTRACE |
a7d2475a ME |
185 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
186 | select HAVE_EBPF_JIT if PPC64 | |
187 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) | |
188 | select HAVE_FTRACE_MCOUNT_RECORD | |
7cd01b08 | 189 | select HAVE_FUNCTION_ERROR_INJECTION |
60ce8f72 | 190 | select HAVE_FUNCTION_GRAPH_TRACER |
a7d2475a | 191 | select HAVE_FUNCTION_TRACER |
8034c2fb | 192 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
e585513b | 193 | select HAVE_GENERIC_GUP |
a7d2475a | 194 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
ec7748b5 | 195 | select HAVE_IDE |
a1f242ff | 196 | select HAVE_IOREMAP_PROT |
a7d2475a ME |
197 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
198 | select HAVE_KERNEL_GZIP | |
423bfc69 | 199 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
3f550096 | 200 | select HAVE_KPROBES |
ead514d5 | 201 | select HAVE_KPROBES_ON_FTRACE |
9edddaa2 | 202 | select HAVE_KRETPROBES |
4c1d9bb0 | 203 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
a7d2475a | 204 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
1d7cfe18 | 205 | select HAVE_MEMBLOCK_NODE_MAP |
a7d2475a | 206 | select HAVE_MOD_ARCH_SPECIFIC |
2104180a NP |
207 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
208 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) | |
4e491d14 | 209 | select HAVE_OPROFILE |
a7d2475a | 210 | select HAVE_OPTPROBES if PPC64 |
cdd6c482 | 211 | select HAVE_PERF_EVENTS |
a7d2475a | 212 | select HAVE_PERF_EVENTS_NMI if PPC64 |
92e5aae4 | 213 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH |
ed4a4ef8 | 214 | select HAVE_PERF_REGS |
17ed7c38 | 215 | select HAVE_PERF_USER_STACK_DUMP |
a7d2475a | 216 | select HAVE_RCU_TABLE_FREE if SMP |
96bc9567 | 217 | select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE |
ed6a7935 | 218 | select HAVE_MMU_GATHER_PAGE_SIZE |
359e4284 | 219 | select HAVE_REGS_AND_STACK_ACCESS_API |
a50d3250 | 220 | select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN |
a7d2475a ME |
221 | select HAVE_SYSCALL_TRACEPOINTS |
222 | select HAVE_VIRT_CPU_ACCOUNTING | |
518470fe | 223 | select HAVE_IRQ_TIME_ACCOUNTING |
8a417c48 | 224 | select HAVE_RSEQ |
a4ce5a48 | 225 | select IOMMU_HELPER if PPC64 |
cc79ca69 | 226 | select IRQ_DOMAIN |
e8d2c473 | 227 | select IRQ_FORCED_THREADING |
786d35d4 | 228 | select MODULES_USE_ELF_RELA |
06832fc0 | 229 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
86596f0a | 230 | select NEED_SG_DMA_LENGTH |
a7d2475a ME |
231 | select OF |
232 | select OF_EARLY_FLATTREE | |
a7d2475a ME |
233 | select OLD_SIGACTION if PPC32 |
234 | select OLD_SIGSUSPEND | |
2eac9c2d | 235 | select PCI_DOMAINS if PCI |
20f1b79d | 236 | select PCI_SYSCALL if PCI |
6e8cef38 | 237 | select RTC_LIB |
a7d2475a ME |
238 | select SPARSE_IRQ |
239 | select SYSCTL_EXCEPTION_TRACE | |
ed1cd6de | 240 | select THREAD_INFO_IN_TASK |
a7d2475a ME |
241 | select VIRT_TO_BUS if !PPC64 |
242 | # | |
243 | # Please keep this list sorted alphabetically. | |
244 | # | |
14cf11af | 245 | |
179ab1cb ME |
246 | config PPC_BARRIER_NOSPEC |
247 | bool | |
248 | default y | |
ebcd1bfc | 249 | depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E |
179ab1cb | 250 | |
14cf11af PM |
251 | config EARLY_PRINTK |
252 | bool | |
51d3082f | 253 | default y |
14cf11af | 254 | |
b71d47c1 JB |
255 | config PANIC_TIMEOUT |
256 | int | |
257 | default 180 | |
258 | ||
14cf11af PM |
259 | config COMPAT |
260 | bool | |
261 | default y if PPC64 | |
01e31dba | 262 | select COMPAT_BINFMT_ELF |
48b25c43 | 263 | select ARCH_WANT_OLD_COMPAT_IPC |
09a4d5d0 | 264 | select COMPAT_OLD_SIGACTION |
14cf11af PM |
265 | |
266 | config SYSVIPC_COMPAT | |
267 | bool | |
268 | depends on COMPAT && SYSVIPC | |
269 | default y | |
270 | ||
ae1e9130 | 271 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
272 | bool |
273 | default y | |
274 | ||
275 | config ARCH_MAY_HAVE_PC_FDC | |
276 | bool | |
3484a31f | 277 | default PCI |
14cf11af | 278 | |
08264cbc KG |
279 | config PPC_UDBG_16550 |
280 | bool | |
08264cbc | 281 | |
08264cbc KG |
282 | config GENERIC_TBSYNC |
283 | bool | |
284 | default y if PPC32 && SMP | |
08264cbc | 285 | |
e65e1fc2 AV |
286 | config AUDIT_ARCH |
287 | bool | |
288 | default y | |
289 | ||
73c9ceab JF |
290 | config GENERIC_BUG |
291 | bool | |
292 | default y | |
293 | depends on BUG | |
294 | ||
b3028878 | 295 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 296 | default y if PMAC_APM_EMU |
b3028878 JB |
297 | bool |
298 | ||
6c5b59b9 DG |
299 | config EPAPR_BOOT |
300 | bool | |
301 | help | |
302 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
6c5b59b9 | 303 | |
f4fc4a5b KG |
304 | config DEFAULT_UIMAGE |
305 | bool | |
306 | help | |
307 | Used to allow a board to specify it wants a uImage built by default | |
f4fc4a5b | 308 | |
801e4062 JB |
309 | config ARCH_HIBERNATION_POSSIBLE |
310 | bool | |
543b9fd3 JB |
311 | default y |
312 | ||
f4cb5700 JB |
313 | config ARCH_SUSPEND_POSSIBLE |
314 | def_bool y | |
4ffd6952 | 315 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
d0832a75 ZC |
316 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
317 | || 44x || 40x | |
f4cb5700 | 318 | |
9ca12ac0 NP |
319 | config ARCH_SUSPEND_NONZERO_CPU |
320 | def_bool y | |
321 | depends on PPC_POWERNV || PPC_PSERIES | |
322 | ||
4c75a6f4 BH |
323 | config PPC_DCR_NATIVE |
324 | bool | |
4c75a6f4 BH |
325 | |
326 | config PPC_DCR_MMIO | |
327 | bool | |
4c75a6f4 BH |
328 | |
329 | config PPC_DCR | |
330 | bool | |
331 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
332 | default y | |
333 | ||
4c9d2800 BH |
334 | config PPC_OF_PLATFORM_PCI |
335 | bool | |
373a6da1 | 336 | depends on PCI |
4c9d2800 | 337 | depends on PPC64 # not supported on 32 bits yet |
4c9d2800 | 338 | |
6a11f75b | 339 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
4e003747 | 340 | depends on PPC32 || PPC_BOOK3S_64 |
6a11f75b AM |
341 | def_bool y |
342 | ||
8b7b80b9 AM |
343 | config ARCH_SUPPORTS_UPROBES |
344 | def_bool y | |
345 | ||
172ae2e7 DK |
346 | config PPC_ADV_DEBUG_REGS |
347 | bool | |
348 | depends on 40x || BOOKE | |
349 | default y | |
350 | ||
351 | config PPC_ADV_DEBUG_IACS | |
352 | int | |
353 | depends on PPC_ADV_DEBUG_REGS | |
354 | default 4 if 44x | |
355 | default 2 | |
356 | ||
357 | config PPC_ADV_DEBUG_DACS | |
358 | int | |
359 | depends on PPC_ADV_DEBUG_REGS | |
360 | default 2 | |
361 | ||
362 | config PPC_ADV_DEBUG_DVCS | |
363 | int | |
364 | depends on PPC_ADV_DEBUG_REGS | |
365 | default 2 if 44x | |
366 | default 0 | |
367 | ||
368 | config PPC_ADV_DEBUG_DAC_RANGE | |
369 | bool | |
370 | depends on PPC_ADV_DEBUG_REGS && 44x | |
371 | default y | |
372 | ||
25078dc1 | 373 | config ZONE_DMA |
1c98025c | 374 | bool |
25078dc1 | 375 | default y if PPC_BOOK3E_64 |
1c98025c | 376 | |
06ef42a1 KS |
377 | config PGTABLE_LEVELS |
378 | int | |
379 | default 2 if !PPC64 | |
06ef42a1 KS |
380 | default 4 |
381 | ||
a2d2e1ec | 382 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 383 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 384 | |
14cf11af PM |
385 | menu "Kernel options" |
386 | ||
387 | config HIGHMEM | |
388 | bool "High memory support" | |
389 | depends on PPC32 | |
390 | ||
8636a1f9 | 391 | source "kernel/Kconfig.hz" |
14cf11af | 392 | |
ba72cb8c MG |
393 | config HUGETLB_PAGE_SIZE_VARIABLE |
394 | bool | |
c5710cd2 | 395 | depends on HUGETLB_PAGE && PPC_BOOK3S_64 |
ba72cb8c MG |
396 | default y |
397 | ||
14cf11af PM |
398 | config MATH_EMULATION |
399 | bool "Math emulation" | |
968159c0 | 400 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE |
14cf11af PM |
401 | ---help--- |
402 | Some PowerPC chips designed for embedded applications do not have | |
403 | a floating-point unit and therefore do not implement the | |
404 | floating-point instructions in the PowerPC instruction set. If you | |
405 | say Y here, the kernel will include code to emulate a floating-point | |
406 | unit, which will allow programs that use floating-point | |
407 | instructions to run. | |
408 | ||
4e63f8ed BH |
409 | This is also useful to emulate missing (optional) instructions |
410 | such as fsqrt on cores that do have an FPU but do not implement | |
411 | them (such as Freescale BookE). | |
412 | ||
e05c0e81 KH |
413 | choice |
414 | prompt "Math emulation options" | |
415 | default MATH_EMULATION_FULL | |
416 | depends on MATH_EMULATION | |
417 | ||
418 | config MATH_EMULATION_FULL | |
419 | bool "Emulate all the floating point instructions" | |
420 | ---help--- | |
421 | Select this option will enable the kernel to support to emulate | |
422 | all the floating point instructions. If your SoC doesn't have | |
423 | a FPU, you should select this. | |
424 | ||
425 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
426 | bool "Just emulate the FPU unimplemented instructions" | |
427 | ---help--- | |
428 | Select this if you know there does have a hardware FPU on your | |
429 | SoC, but some floating point instructions are not implemented by that. | |
430 | ||
431 | endchoice | |
432 | ||
3d72bbc4 MN |
433 | config PPC_TRANSACTIONAL_MEM |
434 | bool "Transactional Memory support for POWERPC" | |
435 | depends on PPC_BOOK3S_64 | |
436 | depends on SMP | |
7b37a123 MN |
437 | select ALTIVEC |
438 | select VSX | |
3d72bbc4 MN |
439 | ---help--- |
440 | Support user-mode Transactional Memory on POWERPC. | |
441 | ||
951eedeb NP |
442 | config LD_HEAD_STUB_CATCH |
443 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT | |
444 | depends on PPC64 | |
951eedeb NP |
445 | help |
446 | Very large kernels can cause linker branch stubs to be generated by | |
447 | code in head_64.S, which moves the head text sections out of their | |
448 | specified location. This option can work around the problem. | |
449 | ||
450 | If unsure, say "N". | |
451 | ||
8c50b72a TD |
452 | config MPROFILE_KERNEL |
453 | depends on PPC64 && CPU_LITTLE_ENDIAN | |
abba7597 | 454 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
8c50b72a | 455 | |
14cf11af PM |
456 | config HOTPLUG_CPU |
457 | bool "Support for enabling/disabling CPUs" | |
40b31360 | 458 | depends on SMP && (PPC_PSERIES || \ |
2f4f1f81 | 459 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
14cf11af PM |
460 | ---help--- |
461 | Say Y here to be able to disable and re-enable individual | |
462 | CPUs at runtime on SMP machines. | |
463 | ||
464 | Say N if you are unsure. | |
465 | ||
12633e80 NF |
466 | config ARCH_CPU_PROBE_RELEASE |
467 | def_bool y | |
468 | depends on HOTPLUG_CPU | |
469 | ||
cc57637b YG |
470 | config ARCH_ENABLE_MEMORY_HOTPLUG |
471 | def_bool y | |
472 | ||
1482471d BP |
473 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
474 | def_bool y | |
475 | ||
f2296a3d MS |
476 | config PPC64_SUPPORTS_MEMORY_FAILURE |
477 | bool "Add support for memory hwpoison" | |
478 | depends on PPC_BOOK3S_64 | |
479 | default "y" if PPC_POWERNV | |
480 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
481 | ||
14cf11af | 482 | config KEXEC |
642e56ff | 483 | bool "kexec system call" |
96eea642 | 484 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
2965faa5 | 485 | select KEXEC_CORE |
14cf11af PM |
486 | help |
487 | kexec is a system call that implements the ability to shutdown your | |
488 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 489 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
490 | you can start any kernel with it, not just Linux. |
491 | ||
1f1332f7 | 492 | The name comes from the similarity to the exec system call. |
14cf11af PM |
493 | |
494 | It is an ongoing process to be certain the hardware in a machine | |
495 | is properly shutdown, so do not be surprised if this code does not | |
bf220695 GU |
496 | initially work for you. As of this writing the exact hardware |
497 | interface is strongly in flux, so no good recommendation can be | |
498 | made. | |
14cf11af | 499 | |
80f60e50 TJB |
500 | config KEXEC_FILE |
501 | bool "kexec file based system call" | |
502 | select KEXEC_CORE | |
467d2782 | 503 | select HAVE_IMA_KEXEC |
80f60e50 TJB |
504 | select BUILD_BIN2C |
505 | depends on PPC64 | |
506 | depends on CRYPTO=y | |
507 | depends on CRYPTO_SHA256=y | |
508 | help | |
509 | This is a new version of the kexec system call. This call is | |
510 | file based and takes in file descriptors as system call arguments | |
511 | for kernel and initramfs as opposed to a list of segments as is the | |
512 | case for the older kexec call. | |
513 | ||
b799a09f AT |
514 | config ARCH_HAS_KEXEC_PURGATORY |
515 | def_bool KEXEC_FILE | |
516 | ||
4c91bd6e KH |
517 | config RELOCATABLE |
518 | bool "Build a relocatable kernel" | |
084a275e | 519 | depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
4c91bd6e | 520 | select NONSTATIC_KERNEL |
71810db2 | 521 | select MODULE_REL_CRCS if MODVERSIONS |
4c91bd6e KH |
522 | help |
523 | This builds a kernel image that is capable of running at the | |
524 | location the kernel is loaded at. For ppc32, there is no any | |
525 | alignment restrictions, and this feature is a superset of | |
526 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use | |
527 | 16k-aligned base address. The kernel is linked as a | |
528 | position-independent executable (PIE) and contains dynamic relocations | |
529 | which are processed early in the bootup process. | |
530 | ||
531 | One use is for the kexec on panic case where the recovery kernel | |
532 | must live at a different physical address than the primary | |
533 | kernel. | |
534 | ||
535 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
536 | it has been loaded at and the compile time physical addresses | |
537 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
538 | setting can still be useful to bootwrappers that need to know the | |
539 | load address of the kernel (eg. u-boot/mkimage). | |
540 | ||
70839d20 NP |
541 | config RELOCATABLE_TEST |
542 | bool "Test relocatable kernel" | |
543 | depends on (PPC64 && RELOCATABLE) | |
70839d20 NP |
544 | help |
545 | This runs the relocatable kernel at the address it was initially | |
546 | loaded at, which tends to be non-zero and therefore test the | |
547 | relocation code. | |
548 | ||
e8625d46 | 549 | config CRASH_DUMP |
22bd0177 | 550 | bool "Build a dump capture kernel" |
be34fff0 | 551 | depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
084a275e | 552 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
e8625d46 | 553 | help |
22bd0177 | 554 | Build a kernel suitable for use as a dump capture kernel. |
54622f10 MK |
555 | The same kernel binary can be used as production kernel and dump |
556 | capture kernel. | |
e8625d46 | 557 | |
eb39c880 MS |
558 | config FA_DUMP |
559 | bool "Firmware-assisted dump" | |
22bd0177 HB |
560 | depends on PPC64 && PPC_RTAS |
561 | select CRASH_CORE | |
562 | select CRASH_DUMP | |
242f271c | 563 | help |
eb39c880 MS |
564 | A robust mechanism to get reliable kernel crash dump with |
565 | assistance from firmware. This approach does not use kexec, | |
22bd0177 | 566 | instead firmware assists in booting the capture kernel |
eb39c880 MS |
567 | while preserving memory contents. Firmware-assisted dump |
568 | is meant to be a kdump replacement offering robustness and | |
569 | speed not possible without system firmware assistance. | |
242f271c MA |
570 | |
571 | If unsure, say "N" | |
572 | ||
14cf11af PM |
573 | config IRQ_ALL_CPUS |
574 | bool "Distribute interrupts on all CPUs by default" | |
6cf09b9d | 575 | depends on SMP |
14cf11af PM |
576 | help |
577 | This option gives the kernel permission to distribute IRQs across | |
578 | multiple CPUs. Saying N here will route all IRQs to the first | |
579 | CPU. Generally saying Y is safe, although some problems have been | |
580 | reported with SMP Power Macintoshes with this option enabled. | |
581 | ||
ffa27b6b AW |
582 | config NUMA |
583 | bool "NUMA support" | |
584 | depends on PPC64 | |
585 | default y if SMP && PPC_PSERIES | |
586 | ||
c80d79d7 YG |
587 | config NODES_SHIFT |
588 | int | |
ea55bf29 | 589 | default "8" if PPC64 |
c80d79d7 YG |
590 | default "4" |
591 | depends on NEED_MULTIPLE_NODES | |
592 | ||
8c272261 NA |
593 | config USE_PERCPU_NUMA_NODE_ID |
594 | def_bool y | |
595 | depends on NUMA | |
596 | ||
64bb80d8 NA |
597 | config HAVE_MEMORYLESS_NODES |
598 | def_bool y | |
599 | depends on NUMA | |
600 | ||
14cf11af PM |
601 | config ARCH_SELECT_MEMORY_MODEL |
602 | def_bool y | |
603 | depends on PPC64 | |
604 | ||
605 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
606 | def_bool y |
607 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 608 | |
45fb6cea | 609 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 610 | def_bool y |
9100b205 | 611 | depends on PPC64 |
d29eff7b | 612 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 613 | |
45fb6cea | 614 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 615 | def_bool y |
7b3912f4 | 616 | depends on PPC_BOOK3S_64 |
14cf11af | 617 | |
5a1eb5c4 | 618 | config SYS_SUPPORTS_HUGETLBFS |
41151e77 | 619 | bool |
5a1eb5c4 | 620 | |
f6853eb5 ME |
621 | config ILLEGAL_POINTER_VALUE |
622 | hex | |
623 | # This is roughly half way between the top of user space and the bottom | |
624 | # of kernel space, which seems about as good as we can get. | |
625 | default 0x5deadbeef0000000 if PPC64 | |
626 | default 0 | |
627 | ||
7e9191da MK |
628 | config ARCH_MEMORY_PROBE |
629 | def_bool y | |
630 | depends on MEMORY_HOTPLUG | |
631 | ||
75167957 AW |
632 | # Some NUMA nodes have memory ranges that span |
633 | # other nodes. Even though a pfn is valid and | |
634 | # between a node's start and end pfns, it may not | |
635 | # reside on that node. See memmap_init_zone() | |
636 | # for details. | |
637 | config NODES_SPAN_OTHER_NODES | |
638 | def_bool y | |
639 | depends on NEED_MULTIPLE_NODES | |
640 | ||
e1240122 YT |
641 | config STDBINUTILS |
642 | bool "Using standard binutils settings" | |
643 | depends on 44x | |
644 | default y | |
645 | help | |
646 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
647 | Note, that kernel will be able to run only those applications, | |
648 | which had been compiled using binutils later than 2.17.50.0.3 with | |
649 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
650 | the older binutils, you can patch them with a trivial patch, which | |
651 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
652 | ||
ca9153a3 IY |
653 | choice |
654 | prompt "Page size" | |
655 | default PPC_4K_PAGES | |
3c726f8d | 656 | help |
ca9153a3 IY |
657 | Select the kernel logical page size. Increasing the page size |
658 | will reduce software overhead at each page boundary, allow | |
659 | hardware prefetch mechanisms to be more effective, and allow | |
660 | larger dma transfers increasing IO efficiency and reducing | |
661 | overhead. However the utilization of memory will increase. | |
662 | For example, each cached file will using a multiple of the | |
663 | page size to hold its contents and the difference between the | |
664 | end of file and the end of page is wasted. | |
665 | ||
666 | Some dedicated systems, such as software raid serving with | |
667 | accelerated calculations, have shown significant increases. | |
668 | ||
669 | If you configure a 64 bit kernel for 64k pages but the | |
670 | processor does not support them, then the kernel will simulate | |
671 | them with 4k pages, loading them on demand, but with the | |
672 | reduced software overhead and larger internal fragmentation. | |
673 | For the 32 bit kernel, a large page option will not be offered | |
674 | unless it is supported by the configured processor. | |
675 | ||
676 | If unsure, choose 4K_PAGES. | |
677 | ||
678 | config PPC_4K_PAGES | |
679 | bool "4k page size" | |
19f97c98 | 680 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 IY |
681 | |
682 | config PPC_16K_PAGES | |
55f8b5b8 | 683 | bool "16k page size" |
55c8fc3f | 684 | depends on 44x || PPC_8xx |
ca9153a3 IY |
685 | |
686 | config PPC_64K_PAGES | |
55f8b5b8 | 687 | bool "64k page size" |
bba43630 | 688 | depends on 44x || PPC_BOOK3S_64 |
19f97c98 | 689 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 | 690 | |
e1240122 | 691 | config PPC_256K_PAGES |
55f8b5b8 ME |
692 | bool "256k page size" |
693 | depends on 44x && !STDBINUTILS | |
e1240122 YT |
694 | help |
695 | Make the page size 256k. | |
696 | ||
697 | As the ELF standard only requires alignment to support page | |
698 | sizes up to 64k, you will need to compile all of your user | |
699 | space applications with a non-standard binutils settings | |
700 | (see the STDBINUTILS description for details). | |
701 | ||
702 | Say N unless you know what you are doing. | |
703 | ||
ca9153a3 | 704 | endchoice |
3c726f8d | 705 | |
555f4fdb CL |
706 | config PPC_PAGE_SHIFT |
707 | int | |
708 | default 18 if PPC_256K_PAGES | |
709 | default 16 if PPC_64K_PAGES | |
710 | default 14 if PPC_16K_PAGES | |
711 | default 12 | |
712 | ||
47613407 HM |
713 | config THREAD_SHIFT |
714 | int "Thread shift" if EXPERT | |
715 | range 13 15 | |
716 | default "15" if PPC_256K_PAGES | |
717 | default "14" if PPC64 | |
718 | default "13" | |
719 | help | |
720 | Used to define the stack size. The default is almost always what you | |
721 | want. Only change this if you know what you are doing. | |
722 | ||
0f4a9041 | 723 | config ETEXT_SHIFT_BOOL |
8f54a6f7 CL |
724 | bool "Set custom etext alignment" if STRICT_KERNEL_RWX && \ |
725 | (PPC_BOOK3S_32 || PPC_8xx) | |
0f4a9041 CL |
726 | depends on ADVANCED_OPTIONS |
727 | help | |
728 | This option allows you to set the kernel end of text alignment. When | |
729 | RAM is mapped by blocks, the alignment needs to fit the size and | |
730 | number of possible blocks. The default should be OK for most configs. | |
731 | ||
732 | Say N here unless you know what you are doing. | |
733 | ||
166d97d9 | 734 | config ETEXT_SHIFT |
0f4a9041 CL |
735 | int "_etext shift" if ETEXT_SHIFT_BOOL |
736 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 | |
8f54a6f7 | 737 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
63b2bc61 | 738 | default 17 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
d5f17ee9 | 739 | default 19 if STRICT_KERNEL_RWX && PPC_8xx |
166d97d9 | 740 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
741 | help |
742 | On Book3S 32 (603+), IBATs are used to map kernel text. | |
743 | Smaller is the alignment, greater is the number of necessary IBATs. | |
744 | ||
8f54a6f7 CL |
745 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
746 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
747 | in that case. | |
748 | ||
0f4a9041 | 749 | config DATA_SHIFT_BOOL |
8f54a6f7 CL |
750 | bool "Set custom data alignment" if STRICT_KERNEL_RWX && \ |
751 | (PPC_BOOK3S_32 || PPC_8xx) | |
0f4a9041 CL |
752 | depends on ADVANCED_OPTIONS |
753 | help | |
754 | This option allows you to set the kernel data alignment. When | |
755 | RAM is mapped by blocks, the alignment needs to fit the size and | |
756 | number of possible blocks. The default should be OK for most configs. | |
757 | ||
758 | Say N here unless you know what you are doing. | |
166d97d9 CL |
759 | |
760 | config DATA_SHIFT | |
0f4a9041 | 761 | int "Data shift" if DATA_SHIFT_BOOL |
166d97d9 | 762 | default 24 if STRICT_KERNEL_RWX && PPC64 |
0f4a9041 | 763 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
8f54a6f7 | 764 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
63b2bc61 | 765 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
8f54a6f7 | 766 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
166d97d9 | 767 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
768 | help |
769 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. | |
770 | Smaller is the alignment, greater is the number of necessary DBATs. | |
166d97d9 | 771 | |
8f54a6f7 CL |
772 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
773 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
774 | in that case. | |
775 | ||
53bcddb9 SR |
776 | config FORCE_MAX_ZONEORDER |
777 | int "Maximum zone order" | |
a7ee5395 | 778 | range 8 9 if PPC64 && PPC_64K_PAGES |
066c4b87 | 779 | default "9" if PPC64 && PPC_64K_PAGES |
d5a1e42c | 780 | range 13 13 if PPC64 && !PPC_64K_PAGES |
066c4b87 BH |
781 | default "13" if PPC64 && !PPC_64K_PAGES |
782 | range 9 64 if PPC32 && PPC_16K_PAGES | |
783 | default "9" if PPC32 && PPC_16K_PAGES | |
784 | range 7 64 if PPC32 && PPC_64K_PAGES | |
785 | default "7" if PPC32 && PPC_64K_PAGES | |
786 | range 5 64 if PPC32 && PPC_256K_PAGES | |
787 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 788 | range 11 64 |
53bcddb9 SR |
789 | default "11" |
790 | help | |
791 | The kernel memory allocator divides physically contiguous memory | |
792 | blocks into "zones", where each zone is a power of two number of | |
793 | pages. This option selects the largest power of two that the kernel | |
794 | keeps in the memory allocator. If you need to allocate very large | |
795 | blocks of physically contiguous memory, then you may need to | |
796 | increase this value. | |
797 | ||
798 | This config option is actually maximum order plus one. For example, | |
799 | a value of 11 means that the largest free memory block is 2^10 pages. | |
800 | ||
801 | The page size is not necessarily 4KB. For example, on 64-bit | |
802 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
803 | this in mind when choosing a value for this option. | |
804 | ||
fa28237c PM |
805 | config PPC_SUBPAGE_PROT |
806 | bool "Support setting protections for 4k subpages" | |
4e003747 | 807 | depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
fa28237c PM |
808 | help |
809 | This option adds support for a system call to allow user programs | |
810 | to set access permissions (read/write, readonly, or no access) | |
811 | on the 4k subpages of each 64k page. | |
812 | ||
e83d0169 IM |
813 | config PPC_COPRO_BASE |
814 | bool | |
e83d0169 | 815 | |
14cf11af PM |
816 | config SCHED_SMT |
817 | bool "SMT (Hyperthreading) scheduler support" | |
818 | depends on PPC64 && SMP | |
14cf11af PM |
819 | help |
820 | SMT scheduler support improves the CPU scheduler's decision making | |
821 | when dealing with POWER5 cpus at a cost of slightly increased | |
822 | overhead in some places. If unsure say N here. | |
823 | ||
b92a66a6 MN |
824 | config PPC_DENORMALISATION |
825 | bool "PowerPC denormalisation exception handling" | |
826 | depends on PPC_BOOK3S_64 | |
4e90a2a7 | 827 | default "y" if PPC_POWERNV |
b92a66a6 MN |
828 | ---help--- |
829 | Add support for handling denormalisation of single precision | |
830 | values. Useful for bare metal only. If unsure say Y here. | |
831 | ||
14cf11af PM |
832 | config CMDLINE_BOOL |
833 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
834 | |
835 | config CMDLINE | |
cbe46bd4 CL |
836 | string "Initial kernel command string" if CMDLINE_BOOL |
837 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL | |
838 | default "" | |
14cf11af PM |
839 | help |
840 | On some platforms, there is currently no way for the boot loader to | |
841 | pass arguments to the kernel. For these platforms, you can supply | |
842 | some command-line options at build time by entering them here. In | |
843 | most cases you will need to specify the root device here. | |
844 | ||
eb3b80f6 SS |
845 | config CMDLINE_FORCE |
846 | bool "Always use the default kernel command string" | |
847 | depends on CMDLINE_BOOL | |
848 | help | |
849 | Always use the default kernel command string, even if the boot | |
850 | loader passes other arguments to the kernel. | |
851 | This is useful if you cannot or don't want to change the | |
852 | command-line options your boot loader passes to the kernel. | |
853 | ||
c356aa45 GL |
854 | config EXTRA_TARGETS |
855 | string "Additional default image types" | |
856 | help | |
857 | List additional targets to be built by the bootwrapper here (separated | |
858 | by spaces). This is useful for targets that depend of device tree | |
859 | files in the .dts directory. | |
860 | ||
861 | Targets in this list will be build as part of the default build | |
862 | target, or when the user does a 'make zImage' or a | |
863 | 'make zImage.initrd'. | |
864 | ||
865 | If unsure, leave blank | |
866 | ||
b28f5081 JB |
867 | config ARCH_WANTS_FREEZER_CONTROL |
868 | def_bool y | |
869 | depends on ADB_PMU | |
870 | ||
8636a1f9 | 871 | source "kernel/power/Kconfig" |
14cf11af PM |
872 | |
873 | config SECCOMP | |
874 | bool "Enable seccomp to safely compute untrusted bytecode" | |
875 | depends on PROC_FS | |
876 | default y | |
877 | help | |
878 | This kernel feature is useful for number crunching applications | |
879 | that may need to compute untrusted bytecode during their | |
880 | execution. By using pipes or other transports made available to | |
881 | the process as file descriptors supporting the read/write | |
882 | syscalls, it's possible to isolate those applications in | |
883 | their own address space using seccomp. Once seccomp is | |
884 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
885 | and the task is only allowed to execute a few safe syscalls | |
886 | defined by each seccomp mode. | |
887 | ||
888 | If unsure, say Y. Only embedded should say N here. | |
889 | ||
92e3da3c RP |
890 | config PPC_MEM_KEYS |
891 | prompt "PowerPC Memory Protection Keys" | |
892 | def_bool y | |
893 | depends on PPC_BOOK3S_64 | |
894 | select ARCH_USES_HIGH_VMA_FLAGS | |
895 | select ARCH_HAS_PKEYS | |
896 | help | |
897 | Memory Protection Keys provides a mechanism for enforcing | |
898 | page-based protections, but without requiring modification of the | |
899 | page tables when an application changes protection domains. | |
900 | ||
ad56b738 | 901 | For details, see Documentation/vm/protection-keys.rst |
92e3da3c RP |
902 | |
903 | If unsure, say y. | |
904 | ||
14cf11af PM |
905 | endmenu |
906 | ||
907 | config ISA_DMA_API | |
908 | bool | |
3d066d77 | 909 | default PCI |
14cf11af PM |
910 | |
911 | menu "Bus options" | |
912 | ||
913 | config ISA | |
914 | bool "Support for ISA-bus hardware" | |
933ee711 | 915 | depends on PPC_CHRP |
f9bd170a | 916 | select PPC_I8259 |
14cf11af PM |
917 | help |
918 | Find out whether you have ISA slots on your motherboard. ISA is the | |
919 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
920 | inside your box. If you have an Apple machine, say N here; if you | |
933ee711 PB |
921 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
922 | embedded board, consult your board documentation. | |
14cf11af PM |
923 | |
924 | config GENERIC_ISA_DMA | |
925 | bool | |
1927445a | 926 | depends on ISA_DMA_API |
14cf11af PM |
927 | default y |
928 | ||
25635c71 PM |
929 | config PPC_INDIRECT_PCI |
930 | bool | |
931 | depends on PCI | |
63dafe57 | 932 | default y if 40x || 44x |
25635c71 | 933 | |
14cf11af PM |
934 | config SBUS |
935 | bool | |
936 | ||
08264cbc KG |
937 | config FSL_SOC |
938 | bool | |
939 | ||
55c44991 RZ |
940 | config FSL_PCI |
941 | bool | |
11ddce15 | 942 | select ARCH_HAS_DMA_SET_MASK |
55c44991 | 943 | select PPC_INDIRECT_PCI |
d0839118 | 944 | select PCI_QUIRKS |
55c44991 | 945 | |
4ffd6952 AV |
946 | config FSL_PMC |
947 | bool | |
948 | default y | |
949 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
950 | help | |
951 | Freescale MPC85xx/MPC86xx power management controller support | |
952 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
953 | ||
d164f6d4 VG |
954 | config PPC4xx_CPM |
955 | bool | |
956 | default y | |
957 | depends on SUSPEND && (44x || 40x) | |
958 | help | |
959 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
960 | It also enables support for two different idle states (idle-wait | |
961 | and idle-doze). | |
962 | ||
2a706919 SR |
963 | config 4xx_SOC |
964 | bool | |
965 | ||
acaa7aa3 | 966 | config FSL_LBC |
3ab8f2a2 | 967 | bool "Freescale Local Bus support" |
acaa7aa3 | 968 | help |
3ab8f2a2 RZ |
969 | Enables reporting of errors from the Freescale local bus |
970 | controller. Also contains some common code used by | |
971 | drivers for specific local bus peripherals. | |
acaa7aa3 | 972 | |
83ff9dcf AV |
973 | config FSL_GTM |
974 | bool | |
975 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
976 | help | |
977 | Freescale General-purpose Timers support | |
978 | ||
14cf11af PM |
979 | config PCI_8260 |
980 | bool | |
981 | depends on PCI && 8260 | |
25635c71 | 982 | select PPC_INDIRECT_PCI |
14cf11af PM |
983 | default y |
984 | ||
388b78ad AB |
985 | config FSL_RIO |
986 | bool "Freescale Embedded SRIO Controller support" | |
1753d50c | 987 | depends on RAPIDIO = y && HAVE_RAPIDIO |
388b78ad AB |
988 | default "n" |
989 | ---help--- | |
990 | Include support for RapidIO controller on Freescale embedded | |
991 | processors (MPC8548, MPC8641, etc). | |
992 | ||
14cf11af PM |
993 | endmenu |
994 | ||
0f890c8d SP |
995 | config NONSTATIC_KERNEL |
996 | bool | |
0f890c8d | 997 | |
14cf11af PM |
998 | menu "Advanced setup" |
999 | depends on PPC32 | |
1000 | ||
1001 | config ADVANCED_OPTIONS | |
1002 | bool "Prompt for advanced kernel configuration options" | |
1003 | help | |
1004 | This option will enable prompting for a variety of advanced kernel | |
1005 | configuration options. These options can cause the kernel to not | |
1006 | work if they are set incorrectly, but can be used to optimize certain | |
1007 | aspects of kernel memory management. | |
1008 | ||
1009 | Unless you know what you are doing, say N here. | |
1010 | ||
1011 | comment "Default settings for advanced configuration options are used" | |
1012 | depends on !ADVANCED_OPTIONS | |
1013 | ||
14cf11af PM |
1014 | config LOWMEM_SIZE_BOOL |
1015 | bool "Set maximum low memory" | |
1016 | depends on ADVANCED_OPTIONS | |
1017 | help | |
1018 | This option allows you to set the maximum amount of memory which | |
1019 | will be used as "low memory", that is, memory which the kernel can | |
1020 | access directly, without having to set up a kernel virtual mapping. | |
1021 | This can be useful in optimizing the layout of kernel virtual | |
1022 | memory. | |
1023 | ||
1024 | Say N here unless you know what you are doing. | |
1025 | ||
1026 | config LOWMEM_SIZE | |
1027 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
1028 | default "0x30000000" | |
1029 | ||
96051465 TP |
1030 | config LOWMEM_CAM_NUM_BOOL |
1031 | bool "Set number of CAMs to use to map low memory" | |
1032 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
1033 | help | |
1034 | This option allows you to set the maximum number of CAM slots that | |
1035 | will be used to map low memory. There are a limited number of slots | |
1036 | available and even more limited number that will fit in the L1 MMU. | |
1037 | However, using more entries will allow mapping more low memory. This | |
1038 | can be useful in optimizing the layout of kernel virtual memory. | |
1039 | ||
1040 | Say N here unless you know what you are doing. | |
1041 | ||
1042 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 1043 | depends on FSL_BOOKE |
96051465 TP |
1044 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
1045 | default 3 | |
1046 | ||
0f890c8d | 1047 | config DYNAMIC_MEMSTART |
642e56ff KC |
1048 | bool "Enable page aligned dynamic load address for kernel" |
1049 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) | |
0f890c8d SP |
1050 | select NONSTATIC_KERNEL |
1051 | help | |
1052 | This option enables the kernel to be loaded at any page aligned | |
1053 | physical address. The kernel creates a mapping from KERNELBASE to | |
1054 | the address where the kernel is loaded. The page size here implies | |
1055 | the TLB page size of the mapping for kernel on the particular platform. | |
1056 | Please refer to the init code for finding the TLB page size. | |
1057 | ||
1058 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
1059 | kernel image, where the only restriction is the page aligned kernel | |
1060 | load address. When this option is enabled, the compile time physical | |
1061 | address CONFIG_PHYSICAL_START is ignored. | |
1062 | ||
9c5f7d39 SP |
1063 | This option is overridden by CONFIG_RELOCATABLE |
1064 | ||
37dd2bad KG |
1065 | config PAGE_OFFSET_BOOL |
1066 | bool "Set custom page offset address" | |
1067 | depends on ADVANCED_OPTIONS | |
1068 | help | |
1069 | This option allows you to set the kernel virtual address at which | |
1070 | the kernel will map low memory. This can be useful in optimizing | |
1071 | the virtual memory layout of the system. | |
1072 | ||
1073 | Say N here unless you know what you are doing. | |
1074 | ||
1075 | config PAGE_OFFSET | |
1076 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
1077 | default "0xc0000000" | |
1078 | ||
14cf11af PM |
1079 | config KERNEL_START_BOOL |
1080 | bool "Set custom kernel base address" | |
1081 | depends on ADVANCED_OPTIONS | |
1082 | help | |
1083 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
1084 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
1085 | however there are times (like kdump) that one might not want them | |
1086 | to be the same. | |
14cf11af PM |
1087 | |
1088 | Say N here unless you know what you are doing. | |
1089 | ||
1090 | config KERNEL_START | |
1091 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 1092 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
0f890c8d | 1093 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
14cf11af PM |
1094 | default "0xc0000000" |
1095 | ||
37dd2bad KG |
1096 | config PHYSICAL_START_BOOL |
1097 | bool "Set physical address where the kernel is loaded" | |
1098 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
1099 | help | |
1100 | This gives the physical address where the kernel is loaded. | |
1101 | ||
1102 | Say N here unless you know what you are doing. | |
1103 | ||
1104 | config PHYSICAL_START | |
1105 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
26598f28 | 1106 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
37dd2bad KG |
1107 | default "0x00000000" |
1108 | ||
1109 | config PHYSICAL_ALIGN | |
1110 | hex | |
c8f3570b | 1111 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
1112 | help |
1113 | This value puts the alignment restrictions on physical address | |
1114 | where kernel is loaded and run from. Kernel is compiled for an | |
1115 | address which meets above alignment restriction. | |
1116 | ||
14cf11af PM |
1117 | config TASK_SIZE_BOOL |
1118 | bool "Set custom user task size" | |
1119 | depends on ADVANCED_OPTIONS | |
1120 | help | |
1121 | This option allows you to set the amount of virtual address space | |
1122 | allocated to user tasks. This can be useful in optimizing the | |
1123 | virtual memory layout of the system. | |
1124 | ||
1125 | Say N here unless you know what you are doing. | |
1126 | ||
1127 | config TASK_SIZE | |
1128 | hex "Size of user task space" if TASK_SIZE_BOOL | |
933ee711 | 1129 | default "0x80000000" if PPC_8xx |
4d9e5510 | 1130 | default "0xc0000000" |
14cf11af | 1131 | |
84532a0f BH |
1132 | config CONSISTENT_SIZE_BOOL |
1133 | bool "Set custom consistent memory pool size" | |
1134 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
1135 | help | |
1136 | This option allows you to set the size of the | |
1137 | consistent memory pool. This pool of virtual memory | |
1138 | is used to make consistent memory allocations. | |
1139 | ||
1140 | config CONSISTENT_SIZE | |
1141 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
1142 | default "0x00200000" if NOT_COHERENT_CACHE | |
1143 | ||
14cf11af PM |
1144 | config PIN_TLB |
1145 | bool "Pinned Kernel TLBs (860 ONLY)" | |
87be3e2d CL |
1146 | depends on ADVANCED_OPTIONS && PPC_8xx && \ |
1147 | !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX | |
62f64b49 | 1148 | |
a3059b0c CL |
1149 | config PIN_TLB_DATA |
1150 | bool "Pinned TLB for DATA" | |
1151 | depends on PIN_TLB | |
1152 | default y | |
62f64b49 CL |
1153 | |
1154 | config PIN_TLB_IMMR | |
1155 | bool "Pinned TLB for IMMR" | |
96d19d70 | 1156 | depends on PIN_TLB || PPC_EARLY_DEBUG_CPM |
62f64b49 | 1157 | default y |
a3059b0c CL |
1158 | |
1159 | config PIN_TLB_TEXT | |
1160 | bool "Pinned TLB for TEXT" | |
1161 | depends on PIN_TLB | |
1162 | default y | |
14cf11af PM |
1163 | endmenu |
1164 | ||
cabb5587 | 1165 | if PPC64 |
bdbc29c1 | 1166 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
37dd2bad KG |
1167 | config PAGE_OFFSET |
1168 | hex | |
1169 | default "0xc000000000000000" | |
cabb5587 SR |
1170 | config KERNEL_START |
1171 | hex | |
eeb2d218 | 1172 | default "0xc000000000000000" |
37dd2bad KG |
1173 | config PHYSICAL_START |
1174 | hex | |
37dd2bad | 1175 | default "0x00000000" |
cabb5587 SR |
1176 | endif |
1177 | ||
a4da0d50 ME |
1178 | config ARCH_RANDOM |
1179 | def_bool n | |
1180 | ||
1088a209 SM |
1181 | config PPC_LIB_RHEAP |
1182 | bool | |
1183 | ||
bbf45ba5 | 1184 | source "arch/powerpc/kvm/Kconfig" |
85baa095 ME |
1185 | |
1186 | source "kernel/livepatch/Kconfig" |