Commit | Line | Data |
---|---|---|
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) | |
4f44e8ae | 51 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
9fea59bd ME |
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 |
b4fc36e6 | 124 | select ARCH_HAS_DMA_MMAP_PGPROT |
a7d2475a | 125 | select ARCH_HAS_ELF_RANDOMIZE |
6974f0c4 | 126 | select ARCH_HAS_FORTIFY_SOURCE |
a7d2475a | 127 | select ARCH_HAS_GCOV_PROFILE_ALL |
fb0b0a73 | 128 | select ARCH_HAS_KCOV |
cbd34da7 | 129 | select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
420af155 | 130 | select ARCH_HAS_MMIOWB if PPC64 |
ea8c64ac | 131 | select ARCH_HAS_PHYS_TO_DMA |
461cef2a | 132 | select ARCH_HAS_PMEM_API |
17596731 | 133 | select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 |
3010a5ea | 134 | select ARCH_HAS_PTE_SPECIAL |
3ccfebed | 135 | select ARCH_HAS_MEMBARRIER_CALLBACKS |
b4645ffc | 136 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
4ec591e5 | 137 | select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) |
a7d2475a | 138 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
461cef2a | 139 | select ARCH_HAS_UACCESS_FLUSHCACHE |
42ac26d2 | 140 | select ARCH_HAS_UACCESS_MCSAFE if PPC64 |
a7d2475a ME |
141 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
142 | select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
350e88ba | 143 | select ARCH_KEEP_MEMBLOCK |
b7e7c37b | 144 | select ARCH_MIGHT_HAVE_PC_PARPORT |
c74e6d3d | 145 | select ARCH_MIGHT_HAVE_PC_SERIO |
4ec591e5 | 146 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
a7d2475a | 147 | select ARCH_SUPPORTS_ATOMIC_RMW |
a7d2475a ME |
148 | select ARCH_USE_BUILTIN_BSWAP |
149 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
150 | select ARCH_WANT_IPC_PARSE_VERSION | |
77e58496 | 151 | select ARCH_WEAK_RELEASE_ACQUIRE |
d812c0e1 | 152 | select BINFMT_ELF |
a7d2475a ME |
153 | select BUILDTIME_EXTABLE_SORT |
154 | select CLONE_BACKWARDS | |
155 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN | |
0c0c5230 | 156 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
a7d2475a ME |
157 | select EDAC_ATOMIC_SCRUB |
158 | select EDAC_SUPPORT | |
159 | select GENERIC_ATOMIC64 if PPC32 | |
160 | select GENERIC_CLOCKEVENTS | |
161 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP | |
162 | select GENERIC_CMOS_UPDATE | |
163 | select GENERIC_CPU_AUTOPROBE | |
179ab1cb | 164 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
a7d2475a ME |
165 | select GENERIC_IRQ_SHOW |
166 | select GENERIC_IRQ_SHOW_LEVEL | |
eb01d42a | 167 | select GENERIC_PCI_IOMAP if PCI |
a7d2475a ME |
168 | select GENERIC_SMP_IDLE_THREAD |
169 | select GENERIC_STRNCPY_FROM_USER | |
170 | select GENERIC_STRNLEN_USER | |
d4cfb113 | 171 | select GENERIC_TIME_VSYSCALL |
a7d2475a | 172 | select HAVE_ARCH_AUDITSYSCALL |
d909f910 | 173 | select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU |
a7d2475a | 174 | select HAVE_ARCH_JUMP_LABEL |
2edb16ef | 175 | select HAVE_ARCH_KASAN if PPC32 |
a7d2475a | 176 | select HAVE_ARCH_KGDB |
9fea59bd ME |
177 | select HAVE_ARCH_MMAP_RND_BITS |
178 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
20e07af7 | 179 | select HAVE_ARCH_NVRAM_OPS |
a7d2475a ME |
180 | select HAVE_ARCH_SECCOMP_FILTER |
181 | select HAVE_ARCH_TRACEHOOK | |
f079bb3c | 182 | select HAVE_C_RECORDMCOUNT |
a7d2475a | 183 | select HAVE_CBPF_JIT if !PPC64 |
bf6cbd0c ME |
184 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) |
185 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) | |
a7d2475a ME |
186 | select HAVE_CONTEXT_TRACKING if PPC64 |
187 | select HAVE_DEBUG_KMEMLEAK | |
188 | select HAVE_DEBUG_STACKOVERFLOW | |
2b79d696 | 189 | select HAVE_DYNAMIC_FTRACE |
a7d2475a ME |
190 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
191 | select HAVE_EBPF_JIT if PPC64 | |
192 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) | |
67a929e0 | 193 | select HAVE_FAST_GUP |
a7d2475a | 194 | select HAVE_FTRACE_MCOUNT_RECORD |
7cd01b08 | 195 | select HAVE_FUNCTION_ERROR_INJECTION |
60ce8f72 | 196 | select HAVE_FUNCTION_GRAPH_TRACER |
a7d2475a | 197 | select HAVE_FUNCTION_TRACER |
8034c2fb | 198 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
a7d2475a | 199 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
ec7748b5 | 200 | select HAVE_IDE |
a1f242ff | 201 | select HAVE_IOREMAP_PROT |
a7d2475a ME |
202 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
203 | select HAVE_KERNEL_GZIP | |
1cc9a21b | 204 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
264bffad | 205 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
423bfc69 | 206 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
3f550096 | 207 | select HAVE_KPROBES |
ead514d5 | 208 | select HAVE_KPROBES_ON_FTRACE |
9edddaa2 | 209 | select HAVE_KRETPROBES |
4c1d9bb0 | 210 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
a7d2475a | 211 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
1d7cfe18 | 212 | select HAVE_MEMBLOCK_NODE_MAP |
a7d2475a | 213 | select HAVE_MOD_ARCH_SPECIFIC |
2104180a NP |
214 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
215 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) | |
4e491d14 | 216 | select HAVE_OPROFILE |
a7d2475a | 217 | select HAVE_OPTPROBES if PPC64 |
cdd6c482 | 218 | select HAVE_PERF_EVENTS |
a7d2475a | 219 | select HAVE_PERF_EVENTS_NMI if PPC64 |
92e5aae4 | 220 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH |
ed4a4ef8 | 221 | select HAVE_PERF_REGS |
17ed7c38 | 222 | select HAVE_PERF_USER_STACK_DUMP |
a7d2475a | 223 | select HAVE_RCU_TABLE_FREE if SMP |
96bc9567 | 224 | select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE |
ed6a7935 | 225 | select HAVE_MMU_GATHER_PAGE_SIZE |
359e4284 | 226 | select HAVE_REGS_AND_STACK_ACCESS_API |
a50d3250 | 227 | select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN |
a7d2475a ME |
228 | select HAVE_SYSCALL_TRACEPOINTS |
229 | select HAVE_VIRT_CPU_ACCOUNTING | |
518470fe | 230 | select HAVE_IRQ_TIME_ACCOUNTING |
8a417c48 | 231 | select HAVE_RSEQ |
a4ce5a48 | 232 | select IOMMU_HELPER if PPC64 |
cc79ca69 | 233 | select IRQ_DOMAIN |
e8d2c473 | 234 | select IRQ_FORCED_THREADING |
786d35d4 | 235 | select MODULES_USE_ELF_RELA |
06832fc0 | 236 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
86596f0a | 237 | select NEED_SG_DMA_LENGTH |
a7d2475a ME |
238 | select OF |
239 | select OF_EARLY_FLATTREE | |
a7d2475a ME |
240 | select OLD_SIGACTION if PPC32 |
241 | select OLD_SIGSUSPEND | |
2eac9c2d | 242 | select PCI_DOMAINS if PCI |
20f1b79d | 243 | select PCI_SYSCALL if PCI |
a278e7ea | 244 | select PPC_DAWR if PPC64 |
6e8cef38 | 245 | select RTC_LIB |
a7d2475a ME |
246 | select SPARSE_IRQ |
247 | select SYSCTL_EXCEPTION_TRACE | |
ed1cd6de | 248 | select THREAD_INFO_IN_TASK |
a7d2475a ME |
249 | select VIRT_TO_BUS if !PPC64 |
250 | # | |
251 | # Please keep this list sorted alphabetically. | |
252 | # | |
14cf11af | 253 | |
179ab1cb | 254 | config PPC_BARRIER_NOSPEC |
4f44e8ae EWI |
255 | bool |
256 | default y | |
257 | depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E | |
179ab1cb | 258 | |
14cf11af PM |
259 | config EARLY_PRINTK |
260 | bool | |
51d3082f | 261 | default y |
14cf11af | 262 | |
b71d47c1 JB |
263 | config PANIC_TIMEOUT |
264 | int | |
265 | default 180 | |
266 | ||
14cf11af PM |
267 | config COMPAT |
268 | bool | |
269 | default y if PPC64 | |
01e31dba | 270 | select COMPAT_BINFMT_ELF |
48b25c43 | 271 | select ARCH_WANT_OLD_COMPAT_IPC |
09a4d5d0 | 272 | select COMPAT_OLD_SIGACTION |
14cf11af PM |
273 | |
274 | config SYSVIPC_COMPAT | |
275 | bool | |
276 | depends on COMPAT && SYSVIPC | |
277 | default y | |
278 | ||
ae1e9130 | 279 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
280 | bool |
281 | default y | |
282 | ||
283 | config ARCH_MAY_HAVE_PC_FDC | |
284 | bool | |
3484a31f | 285 | default PCI |
14cf11af | 286 | |
08264cbc KG |
287 | config PPC_UDBG_16550 |
288 | bool | |
08264cbc | 289 | |
08264cbc KG |
290 | config GENERIC_TBSYNC |
291 | bool | |
292 | default y if PPC32 && SMP | |
08264cbc | 293 | |
e65e1fc2 AV |
294 | config AUDIT_ARCH |
295 | bool | |
296 | default y | |
297 | ||
73c9ceab JF |
298 | config GENERIC_BUG |
299 | bool | |
300 | default y | |
301 | depends on BUG | |
302 | ||
b3028878 | 303 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 304 | default y if PMAC_APM_EMU |
b3028878 JB |
305 | bool |
306 | ||
6c5b59b9 DG |
307 | config EPAPR_BOOT |
308 | bool | |
309 | help | |
310 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
6c5b59b9 | 311 | |
f4fc4a5b KG |
312 | config DEFAULT_UIMAGE |
313 | bool | |
314 | help | |
315 | Used to allow a board to specify it wants a uImage built by default | |
f4fc4a5b | 316 | |
801e4062 JB |
317 | config ARCH_HIBERNATION_POSSIBLE |
318 | bool | |
543b9fd3 JB |
319 | default y |
320 | ||
f4cb5700 JB |
321 | config ARCH_SUSPEND_POSSIBLE |
322 | def_bool y | |
4ffd6952 | 323 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
d0832a75 ZC |
324 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
325 | || 44x || 40x | |
f4cb5700 | 326 | |
9ca12ac0 NP |
327 | config ARCH_SUSPEND_NONZERO_CPU |
328 | def_bool y | |
329 | depends on PPC_POWERNV || PPC_PSERIES | |
330 | ||
4c75a6f4 BH |
331 | config PPC_DCR_NATIVE |
332 | bool | |
4c75a6f4 BH |
333 | |
334 | config PPC_DCR_MMIO | |
335 | bool | |
4c75a6f4 BH |
336 | |
337 | config PPC_DCR | |
338 | bool | |
339 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
340 | default y | |
341 | ||
4c9d2800 BH |
342 | config PPC_OF_PLATFORM_PCI |
343 | bool | |
373a6da1 | 344 | depends on PCI |
4c9d2800 | 345 | depends on PPC64 # not supported on 32 bits yet |
4c9d2800 | 346 | |
6a11f75b | 347 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
4e003747 | 348 | depends on PPC32 || PPC_BOOK3S_64 |
6a11f75b AM |
349 | def_bool y |
350 | ||
8b7b80b9 AM |
351 | config ARCH_SUPPORTS_UPROBES |
352 | def_bool y | |
353 | ||
172ae2e7 DK |
354 | config PPC_ADV_DEBUG_REGS |
355 | bool | |
356 | depends on 40x || BOOKE | |
357 | default y | |
358 | ||
359 | config PPC_ADV_DEBUG_IACS | |
360 | int | |
361 | depends on PPC_ADV_DEBUG_REGS | |
362 | default 4 if 44x | |
363 | default 2 | |
364 | ||
365 | config PPC_ADV_DEBUG_DACS | |
366 | int | |
367 | depends on PPC_ADV_DEBUG_REGS | |
368 | default 2 | |
369 | ||
370 | config PPC_ADV_DEBUG_DVCS | |
371 | int | |
372 | depends on PPC_ADV_DEBUG_REGS | |
373 | default 2 if 44x | |
374 | default 0 | |
375 | ||
376 | config PPC_ADV_DEBUG_DAC_RANGE | |
377 | bool | |
378 | depends on PPC_ADV_DEBUG_REGS && 44x | |
379 | default y | |
380 | ||
a278e7ea MN |
381 | config PPC_DAWR |
382 | bool | |
383 | ||
25078dc1 | 384 | config ZONE_DMA |
1c98025c | 385 | bool |
25078dc1 | 386 | default y if PPC_BOOK3E_64 |
1c98025c | 387 | |
06ef42a1 KS |
388 | config PGTABLE_LEVELS |
389 | int | |
390 | default 2 if !PPC64 | |
06ef42a1 KS |
391 | default 4 |
392 | ||
a2d2e1ec | 393 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 394 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 395 | |
14cf11af PM |
396 | menu "Kernel options" |
397 | ||
398 | config HIGHMEM | |
399 | bool "High memory support" | |
400 | depends on PPC32 | |
401 | ||
8636a1f9 | 402 | source "kernel/Kconfig.hz" |
14cf11af | 403 | |
ba72cb8c MG |
404 | config HUGETLB_PAGE_SIZE_VARIABLE |
405 | bool | |
c5710cd2 | 406 | depends on HUGETLB_PAGE && PPC_BOOK3S_64 |
ba72cb8c MG |
407 | default y |
408 | ||
14cf11af PM |
409 | config MATH_EMULATION |
410 | bool "Math emulation" | |
968159c0 | 411 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE |
4f44e8ae | 412 | help |
14cf11af PM |
413 | Some PowerPC chips designed for embedded applications do not have |
414 | a floating-point unit and therefore do not implement the | |
415 | floating-point instructions in the PowerPC instruction set. If you | |
416 | say Y here, the kernel will include code to emulate a floating-point | |
417 | unit, which will allow programs that use floating-point | |
418 | instructions to run. | |
419 | ||
4e63f8ed BH |
420 | This is also useful to emulate missing (optional) instructions |
421 | such as fsqrt on cores that do have an FPU but do not implement | |
422 | them (such as Freescale BookE). | |
423 | ||
e05c0e81 KH |
424 | choice |
425 | prompt "Math emulation options" | |
426 | default MATH_EMULATION_FULL | |
427 | depends on MATH_EMULATION | |
428 | ||
429 | config MATH_EMULATION_FULL | |
430 | bool "Emulate all the floating point instructions" | |
4f44e8ae | 431 | help |
e05c0e81 KH |
432 | Select this option will enable the kernel to support to emulate |
433 | all the floating point instructions. If your SoC doesn't have | |
434 | a FPU, you should select this. | |
435 | ||
436 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
437 | bool "Just emulate the FPU unimplemented instructions" | |
4f44e8ae | 438 | help |
e05c0e81 KH |
439 | Select this if you know there does have a hardware FPU on your |
440 | SoC, but some floating point instructions are not implemented by that. | |
441 | ||
442 | endchoice | |
443 | ||
3d72bbc4 | 444 | config PPC_TRANSACTIONAL_MEM |
4f44e8ae EWI |
445 | bool "Transactional Memory support for POWERPC" |
446 | depends on PPC_BOOK3S_64 | |
447 | depends on SMP | |
448 | select ALTIVEC | |
449 | select VSX | |
450 | help | |
451 | Support user-mode Transactional Memory on POWERPC. | |
3d72bbc4 | 452 | |
951eedeb NP |
453 | config LD_HEAD_STUB_CATCH |
454 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT | |
455 | depends on PPC64 | |
951eedeb NP |
456 | help |
457 | Very large kernels can cause linker branch stubs to be generated by | |
458 | code in head_64.S, which moves the head text sections out of their | |
459 | specified location. This option can work around the problem. | |
460 | ||
461 | If unsure, say "N". | |
462 | ||
8c50b72a TD |
463 | config MPROFILE_KERNEL |
464 | depends on PPC64 && CPU_LITTLE_ENDIAN | |
abba7597 | 465 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
8c50b72a | 466 | |
14cf11af PM |
467 | config HOTPLUG_CPU |
468 | bool "Support for enabling/disabling CPUs" | |
40b31360 | 469 | depends on SMP && (PPC_PSERIES || \ |
2f4f1f81 | 470 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
4f44e8ae | 471 | help |
14cf11af PM |
472 | Say Y here to be able to disable and re-enable individual |
473 | CPUs at runtime on SMP machines. | |
474 | ||
475 | Say N if you are unsure. | |
476 | ||
12633e80 NF |
477 | config ARCH_CPU_PROBE_RELEASE |
478 | def_bool y | |
479 | depends on HOTPLUG_CPU | |
480 | ||
cc57637b YG |
481 | config ARCH_ENABLE_MEMORY_HOTPLUG |
482 | def_bool y | |
483 | ||
1482471d BP |
484 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
485 | def_bool y | |
486 | ||
f2296a3d MS |
487 | config PPC64_SUPPORTS_MEMORY_FAILURE |
488 | bool "Add support for memory hwpoison" | |
489 | depends on PPC_BOOK3S_64 | |
490 | default "y" if PPC_POWERNV | |
491 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
492 | ||
14cf11af | 493 | config KEXEC |
642e56ff | 494 | bool "kexec system call" |
96eea642 | 495 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
2965faa5 | 496 | select KEXEC_CORE |
14cf11af PM |
497 | help |
498 | kexec is a system call that implements the ability to shutdown your | |
499 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 500 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
501 | you can start any kernel with it, not just Linux. |
502 | ||
1f1332f7 | 503 | The name comes from the similarity to the exec system call. |
14cf11af PM |
504 | |
505 | It is an ongoing process to be certain the hardware in a machine | |
506 | is properly shutdown, so do not be surprised if this code does not | |
bf220695 GU |
507 | initially work for you. As of this writing the exact hardware |
508 | interface is strongly in flux, so no good recommendation can be | |
509 | made. | |
14cf11af | 510 | |
80f60e50 TJB |
511 | config KEXEC_FILE |
512 | bool "kexec file based system call" | |
513 | select KEXEC_CORE | |
467d2782 | 514 | select HAVE_IMA_KEXEC |
80f60e50 TJB |
515 | select BUILD_BIN2C |
516 | depends on PPC64 | |
517 | depends on CRYPTO=y | |
518 | depends on CRYPTO_SHA256=y | |
519 | help | |
520 | This is a new version of the kexec system call. This call is | |
521 | file based and takes in file descriptors as system call arguments | |
522 | for kernel and initramfs as opposed to a list of segments as is the | |
523 | case for the older kexec call. | |
524 | ||
b799a09f AT |
525 | config ARCH_HAS_KEXEC_PURGATORY |
526 | def_bool KEXEC_FILE | |
527 | ||
4c91bd6e KH |
528 | config RELOCATABLE |
529 | bool "Build a relocatable kernel" | |
084a275e | 530 | depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
4c91bd6e | 531 | select NONSTATIC_KERNEL |
71810db2 | 532 | select MODULE_REL_CRCS if MODVERSIONS |
4c91bd6e KH |
533 | help |
534 | This builds a kernel image that is capable of running at the | |
535 | location the kernel is loaded at. For ppc32, there is no any | |
536 | alignment restrictions, and this feature is a superset of | |
537 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use | |
538 | 16k-aligned base address. The kernel is linked as a | |
539 | position-independent executable (PIE) and contains dynamic relocations | |
540 | which are processed early in the bootup process. | |
541 | ||
542 | One use is for the kexec on panic case where the recovery kernel | |
543 | must live at a different physical address than the primary | |
544 | kernel. | |
545 | ||
546 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
547 | it has been loaded at and the compile time physical addresses | |
548 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
549 | setting can still be useful to bootwrappers that need to know the | |
550 | load address of the kernel (eg. u-boot/mkimage). | |
551 | ||
70839d20 NP |
552 | config RELOCATABLE_TEST |
553 | bool "Test relocatable kernel" | |
554 | depends on (PPC64 && RELOCATABLE) | |
70839d20 NP |
555 | help |
556 | This runs the relocatable kernel at the address it was initially | |
557 | loaded at, which tends to be non-zero and therefore test the | |
558 | relocation code. | |
559 | ||
e8625d46 | 560 | config CRASH_DUMP |
22bd0177 | 561 | bool "Build a dump capture kernel" |
be34fff0 | 562 | depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
084a275e | 563 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
e8625d46 | 564 | help |
22bd0177 | 565 | Build a kernel suitable for use as a dump capture kernel. |
54622f10 MK |
566 | The same kernel binary can be used as production kernel and dump |
567 | capture kernel. | |
e8625d46 | 568 | |
eb39c880 MS |
569 | config FA_DUMP |
570 | bool "Firmware-assisted dump" | |
22bd0177 HB |
571 | depends on PPC64 && PPC_RTAS |
572 | select CRASH_CORE | |
573 | select CRASH_DUMP | |
242f271c | 574 | help |
eb39c880 MS |
575 | A robust mechanism to get reliable kernel crash dump with |
576 | assistance from firmware. This approach does not use kexec, | |
22bd0177 | 577 | instead firmware assists in booting the capture kernel |
eb39c880 MS |
578 | while preserving memory contents. Firmware-assisted dump |
579 | is meant to be a kdump replacement offering robustness and | |
580 | speed not possible without system firmware assistance. | |
242f271c MA |
581 | |
582 | If unsure, say "N" | |
583 | ||
14cf11af PM |
584 | config IRQ_ALL_CPUS |
585 | bool "Distribute interrupts on all CPUs by default" | |
6cf09b9d | 586 | depends on SMP |
14cf11af PM |
587 | help |
588 | This option gives the kernel permission to distribute IRQs across | |
589 | multiple CPUs. Saying N here will route all IRQs to the first | |
590 | CPU. Generally saying Y is safe, although some problems have been | |
591 | reported with SMP Power Macintoshes with this option enabled. | |
592 | ||
ffa27b6b AW |
593 | config NUMA |
594 | bool "NUMA support" | |
595 | depends on PPC64 | |
596 | default y if SMP && PPC_PSERIES | |
597 | ||
c80d79d7 YG |
598 | config NODES_SHIFT |
599 | int | |
ea55bf29 | 600 | default "8" if PPC64 |
c80d79d7 YG |
601 | default "4" |
602 | depends on NEED_MULTIPLE_NODES | |
603 | ||
8c272261 NA |
604 | config USE_PERCPU_NUMA_NODE_ID |
605 | def_bool y | |
606 | depends on NUMA | |
607 | ||
64bb80d8 NA |
608 | config HAVE_MEMORYLESS_NODES |
609 | def_bool y | |
610 | depends on NUMA | |
611 | ||
14cf11af PM |
612 | config ARCH_SELECT_MEMORY_MODEL |
613 | def_bool y | |
614 | depends on PPC64 | |
615 | ||
616 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
617 | def_bool y |
618 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 619 | |
45fb6cea | 620 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 621 | def_bool y |
9100b205 | 622 | depends on PPC64 |
d29eff7b | 623 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 624 | |
45fb6cea | 625 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 626 | def_bool y |
7b3912f4 | 627 | depends on PPC_BOOK3S_64 |
14cf11af | 628 | |
5a1eb5c4 | 629 | config SYS_SUPPORTS_HUGETLBFS |
41151e77 | 630 | bool |
5a1eb5c4 | 631 | |
f6853eb5 ME |
632 | config ILLEGAL_POINTER_VALUE |
633 | hex | |
634 | # This is roughly half way between the top of user space and the bottom | |
635 | # of kernel space, which seems about as good as we can get. | |
636 | default 0x5deadbeef0000000 if PPC64 | |
637 | default 0 | |
638 | ||
7e9191da MK |
639 | config ARCH_MEMORY_PROBE |
640 | def_bool y | |
641 | depends on MEMORY_HOTPLUG | |
642 | ||
75167957 AW |
643 | # Some NUMA nodes have memory ranges that span |
644 | # other nodes. Even though a pfn is valid and | |
645 | # between a node's start and end pfns, it may not | |
646 | # reside on that node. See memmap_init_zone() | |
647 | # for details. | |
648 | config NODES_SPAN_OTHER_NODES | |
649 | def_bool y | |
650 | depends on NEED_MULTIPLE_NODES | |
651 | ||
e1240122 YT |
652 | config STDBINUTILS |
653 | bool "Using standard binutils settings" | |
654 | depends on 44x | |
655 | default y | |
656 | help | |
657 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
658 | Note, that kernel will be able to run only those applications, | |
659 | which had been compiled using binutils later than 2.17.50.0.3 with | |
660 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
661 | the older binutils, you can patch them with a trivial patch, which | |
662 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
663 | ||
ca9153a3 IY |
664 | choice |
665 | prompt "Page size" | |
666 | default PPC_4K_PAGES | |
3c726f8d | 667 | help |
ca9153a3 IY |
668 | Select the kernel logical page size. Increasing the page size |
669 | will reduce software overhead at each page boundary, allow | |
670 | hardware prefetch mechanisms to be more effective, and allow | |
671 | larger dma transfers increasing IO efficiency and reducing | |
672 | overhead. However the utilization of memory will increase. | |
673 | For example, each cached file will using a multiple of the | |
674 | page size to hold its contents and the difference between the | |
675 | end of file and the end of page is wasted. | |
676 | ||
677 | Some dedicated systems, such as software raid serving with | |
678 | accelerated calculations, have shown significant increases. | |
679 | ||
680 | If you configure a 64 bit kernel for 64k pages but the | |
681 | processor does not support them, then the kernel will simulate | |
682 | them with 4k pages, loading them on demand, but with the | |
683 | reduced software overhead and larger internal fragmentation. | |
684 | For the 32 bit kernel, a large page option will not be offered | |
685 | unless it is supported by the configured processor. | |
686 | ||
687 | If unsure, choose 4K_PAGES. | |
688 | ||
689 | config PPC_4K_PAGES | |
690 | bool "4k page size" | |
19f97c98 | 691 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 IY |
692 | |
693 | config PPC_16K_PAGES | |
55f8b5b8 | 694 | bool "16k page size" |
55c8fc3f | 695 | depends on 44x || PPC_8xx |
ca9153a3 IY |
696 | |
697 | config PPC_64K_PAGES | |
55f8b5b8 | 698 | bool "64k page size" |
bba43630 | 699 | depends on 44x || PPC_BOOK3S_64 |
19f97c98 | 700 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 | 701 | |
e1240122 | 702 | config PPC_256K_PAGES |
55f8b5b8 ME |
703 | bool "256k page size" |
704 | depends on 44x && !STDBINUTILS | |
e1240122 YT |
705 | help |
706 | Make the page size 256k. | |
707 | ||
708 | As the ELF standard only requires alignment to support page | |
709 | sizes up to 64k, you will need to compile all of your user | |
710 | space applications with a non-standard binutils settings | |
711 | (see the STDBINUTILS description for details). | |
712 | ||
713 | Say N unless you know what you are doing. | |
714 | ||
ca9153a3 | 715 | endchoice |
3c726f8d | 716 | |
555f4fdb CL |
717 | config PPC_PAGE_SHIFT |
718 | int | |
719 | default 18 if PPC_256K_PAGES | |
720 | default 16 if PPC_64K_PAGES | |
721 | default 14 if PPC_16K_PAGES | |
722 | default 12 | |
723 | ||
47613407 HM |
724 | config THREAD_SHIFT |
725 | int "Thread shift" if EXPERT | |
726 | range 13 15 | |
727 | default "15" if PPC_256K_PAGES | |
728 | default "14" if PPC64 | |
729 | default "13" | |
730 | help | |
731 | Used to define the stack size. The default is almost always what you | |
732 | want. Only change this if you know what you are doing. | |
733 | ||
0f4a9041 | 734 | config ETEXT_SHIFT_BOOL |
8f54a6f7 CL |
735 | bool "Set custom etext alignment" if STRICT_KERNEL_RWX && \ |
736 | (PPC_BOOK3S_32 || PPC_8xx) | |
0f4a9041 CL |
737 | depends on ADVANCED_OPTIONS |
738 | help | |
739 | This option allows you to set the kernel end of text alignment. When | |
740 | RAM is mapped by blocks, the alignment needs to fit the size and | |
741 | number of possible blocks. The default should be OK for most configs. | |
742 | ||
743 | Say N here unless you know what you are doing. | |
744 | ||
166d97d9 | 745 | config ETEXT_SHIFT |
0f4a9041 CL |
746 | int "_etext shift" if ETEXT_SHIFT_BOOL |
747 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 | |
8f54a6f7 | 748 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
63b2bc61 | 749 | default 17 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
d5f17ee9 | 750 | default 19 if STRICT_KERNEL_RWX && PPC_8xx |
166d97d9 | 751 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
752 | help |
753 | On Book3S 32 (603+), IBATs are used to map kernel text. | |
754 | Smaller is the alignment, greater is the number of necessary IBATs. | |
755 | ||
8f54a6f7 CL |
756 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
757 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
758 | in that case. | |
759 | ||
0f4a9041 | 760 | config DATA_SHIFT_BOOL |
8f54a6f7 CL |
761 | bool "Set custom data alignment" if STRICT_KERNEL_RWX && \ |
762 | (PPC_BOOK3S_32 || PPC_8xx) | |
0f4a9041 CL |
763 | depends on ADVANCED_OPTIONS |
764 | help | |
765 | This option allows you to set the kernel data alignment. When | |
766 | RAM is mapped by blocks, the alignment needs to fit the size and | |
767 | number of possible blocks. The default should be OK for most configs. | |
768 | ||
769 | Say N here unless you know what you are doing. | |
166d97d9 CL |
770 | |
771 | config DATA_SHIFT | |
0f4a9041 | 772 | int "Data shift" if DATA_SHIFT_BOOL |
166d97d9 | 773 | default 24 if STRICT_KERNEL_RWX && PPC64 |
0f4a9041 | 774 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
8f54a6f7 | 775 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
63b2bc61 | 776 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
8f54a6f7 | 777 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
166d97d9 | 778 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
779 | help |
780 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. | |
781 | Smaller is the alignment, greater is the number of necessary DBATs. | |
166d97d9 | 782 | |
8f54a6f7 CL |
783 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
784 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
785 | in that case. | |
786 | ||
53bcddb9 SR |
787 | config FORCE_MAX_ZONEORDER |
788 | int "Maximum zone order" | |
a7ee5395 | 789 | range 8 9 if PPC64 && PPC_64K_PAGES |
066c4b87 | 790 | default "9" if PPC64 && PPC_64K_PAGES |
d5a1e42c | 791 | range 13 13 if PPC64 && !PPC_64K_PAGES |
066c4b87 BH |
792 | default "13" if PPC64 && !PPC_64K_PAGES |
793 | range 9 64 if PPC32 && PPC_16K_PAGES | |
794 | default "9" if PPC32 && PPC_16K_PAGES | |
795 | range 7 64 if PPC32 && PPC_64K_PAGES | |
796 | default "7" if PPC32 && PPC_64K_PAGES | |
797 | range 5 64 if PPC32 && PPC_256K_PAGES | |
798 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 799 | range 11 64 |
53bcddb9 SR |
800 | default "11" |
801 | help | |
802 | The kernel memory allocator divides physically contiguous memory | |
803 | blocks into "zones", where each zone is a power of two number of | |
804 | pages. This option selects the largest power of two that the kernel | |
805 | keeps in the memory allocator. If you need to allocate very large | |
806 | blocks of physically contiguous memory, then you may need to | |
807 | increase this value. | |
808 | ||
809 | This config option is actually maximum order plus one. For example, | |
810 | a value of 11 means that the largest free memory block is 2^10 pages. | |
811 | ||
812 | The page size is not necessarily 4KB. For example, on 64-bit | |
813 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
814 | this in mind when choosing a value for this option. | |
815 | ||
fa28237c PM |
816 | config PPC_SUBPAGE_PROT |
817 | bool "Support setting protections for 4k subpages" | |
4e003747 | 818 | depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
fa28237c PM |
819 | help |
820 | This option adds support for a system call to allow user programs | |
821 | to set access permissions (read/write, readonly, or no access) | |
822 | on the 4k subpages of each 64k page. | |
823 | ||
e83d0169 IM |
824 | config PPC_COPRO_BASE |
825 | bool | |
e83d0169 | 826 | |
14cf11af PM |
827 | config SCHED_SMT |
828 | bool "SMT (Hyperthreading) scheduler support" | |
829 | depends on PPC64 && SMP | |
14cf11af PM |
830 | help |
831 | SMT scheduler support improves the CPU scheduler's decision making | |
832 | when dealing with POWER5 cpus at a cost of slightly increased | |
833 | overhead in some places. If unsure say N here. | |
834 | ||
b92a66a6 MN |
835 | config PPC_DENORMALISATION |
836 | bool "PowerPC denormalisation exception handling" | |
837 | depends on PPC_BOOK3S_64 | |
4e90a2a7 | 838 | default "y" if PPC_POWERNV |
4f44e8ae | 839 | help |
b92a66a6 MN |
840 | Add support for handling denormalisation of single precision |
841 | values. Useful for bare metal only. If unsure say Y here. | |
842 | ||
14cf11af PM |
843 | config CMDLINE_BOOL |
844 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
845 | |
846 | config CMDLINE | |
cbe46bd4 CL |
847 | string "Initial kernel command string" if CMDLINE_BOOL |
848 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL | |
849 | default "" | |
14cf11af PM |
850 | help |
851 | On some platforms, there is currently no way for the boot loader to | |
852 | pass arguments to the kernel. For these platforms, you can supply | |
853 | some command-line options at build time by entering them here. In | |
854 | most cases you will need to specify the root device here. | |
855 | ||
eb3b80f6 SS |
856 | config CMDLINE_FORCE |
857 | bool "Always use the default kernel command string" | |
858 | depends on CMDLINE_BOOL | |
859 | help | |
860 | Always use the default kernel command string, even if the boot | |
861 | loader passes other arguments to the kernel. | |
862 | This is useful if you cannot or don't want to change the | |
863 | command-line options your boot loader passes to the kernel. | |
864 | ||
c356aa45 GL |
865 | config EXTRA_TARGETS |
866 | string "Additional default image types" | |
867 | help | |
868 | List additional targets to be built by the bootwrapper here (separated | |
869 | by spaces). This is useful for targets that depend of device tree | |
870 | files in the .dts directory. | |
871 | ||
872 | Targets in this list will be build as part of the default build | |
873 | target, or when the user does a 'make zImage' or a | |
874 | 'make zImage.initrd'. | |
875 | ||
876 | If unsure, leave blank | |
877 | ||
b28f5081 JB |
878 | config ARCH_WANTS_FREEZER_CONTROL |
879 | def_bool y | |
880 | depends on ADB_PMU | |
881 | ||
8636a1f9 | 882 | source "kernel/power/Kconfig" |
14cf11af PM |
883 | |
884 | config SECCOMP | |
885 | bool "Enable seccomp to safely compute untrusted bytecode" | |
886 | depends on PROC_FS | |
887 | default y | |
888 | help | |
889 | This kernel feature is useful for number crunching applications | |
890 | that may need to compute untrusted bytecode during their | |
891 | execution. By using pipes or other transports made available to | |
892 | the process as file descriptors supporting the read/write | |
893 | syscalls, it's possible to isolate those applications in | |
894 | their own address space using seccomp. Once seccomp is | |
895 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
896 | and the task is only allowed to execute a few safe syscalls | |
897 | defined by each seccomp mode. | |
898 | ||
899 | If unsure, say Y. Only embedded should say N here. | |
900 | ||
92e3da3c RP |
901 | config PPC_MEM_KEYS |
902 | prompt "PowerPC Memory Protection Keys" | |
903 | def_bool y | |
904 | depends on PPC_BOOK3S_64 | |
905 | select ARCH_USES_HIGH_VMA_FLAGS | |
906 | select ARCH_HAS_PKEYS | |
907 | help | |
908 | Memory Protection Keys provides a mechanism for enforcing | |
909 | page-based protections, but without requiring modification of the | |
910 | page tables when an application changes protection domains. | |
911 | ||
1eecbcdc | 912 | For details, see Documentation/core-api/protection-keys.rst |
92e3da3c RP |
913 | |
914 | If unsure, say y. | |
915 | ||
14cf11af PM |
916 | endmenu |
917 | ||
918 | config ISA_DMA_API | |
919 | bool | |
3d066d77 | 920 | default PCI |
14cf11af PM |
921 | |
922 | menu "Bus options" | |
923 | ||
924 | config ISA | |
925 | bool "Support for ISA-bus hardware" | |
933ee711 | 926 | depends on PPC_CHRP |
f9bd170a | 927 | select PPC_I8259 |
14cf11af PM |
928 | help |
929 | Find out whether you have ISA slots on your motherboard. ISA is the | |
930 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
931 | inside your box. If you have an Apple machine, say N here; if you | |
933ee711 PB |
932 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
933 | embedded board, consult your board documentation. | |
14cf11af PM |
934 | |
935 | config GENERIC_ISA_DMA | |
936 | bool | |
1927445a | 937 | depends on ISA_DMA_API |
14cf11af PM |
938 | default y |
939 | ||
25635c71 PM |
940 | config PPC_INDIRECT_PCI |
941 | bool | |
942 | depends on PCI | |
63dafe57 | 943 | default y if 40x || 44x |
25635c71 | 944 | |
14cf11af PM |
945 | config SBUS |
946 | bool | |
947 | ||
08264cbc KG |
948 | config FSL_SOC |
949 | bool | |
950 | ||
55c44991 | 951 | config FSL_PCI |
4f44e8ae | 952 | bool |
11ddce15 | 953 | select ARCH_HAS_DMA_SET_MASK |
55c44991 | 954 | select PPC_INDIRECT_PCI |
d0839118 | 955 | select PCI_QUIRKS |
55c44991 | 956 | |
4ffd6952 AV |
957 | config FSL_PMC |
958 | bool | |
959 | default y | |
960 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
961 | help | |
962 | Freescale MPC85xx/MPC86xx power management controller support | |
963 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
964 | ||
d164f6d4 VG |
965 | config PPC4xx_CPM |
966 | bool | |
967 | default y | |
968 | depends on SUSPEND && (44x || 40x) | |
969 | help | |
970 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
971 | It also enables support for two different idle states (idle-wait | |
972 | and idle-doze). | |
973 | ||
2a706919 SR |
974 | config 4xx_SOC |
975 | bool | |
976 | ||
acaa7aa3 | 977 | config FSL_LBC |
3ab8f2a2 | 978 | bool "Freescale Local Bus support" |
acaa7aa3 | 979 | help |
3ab8f2a2 RZ |
980 | Enables reporting of errors from the Freescale local bus |
981 | controller. Also contains some common code used by | |
982 | drivers for specific local bus peripherals. | |
acaa7aa3 | 983 | |
83ff9dcf AV |
984 | config FSL_GTM |
985 | bool | |
986 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
987 | help | |
988 | Freescale General-purpose Timers support | |
989 | ||
14cf11af PM |
990 | config PCI_8260 |
991 | bool | |
992 | depends on PCI && 8260 | |
25635c71 | 993 | select PPC_INDIRECT_PCI |
14cf11af PM |
994 | default y |
995 | ||
388b78ad AB |
996 | config FSL_RIO |
997 | bool "Freescale Embedded SRIO Controller support" | |
1753d50c | 998 | depends on RAPIDIO = y && HAVE_RAPIDIO |
388b78ad | 999 | default "n" |
4f44e8ae | 1000 | help |
388b78ad AB |
1001 | Include support for RapidIO controller on Freescale embedded |
1002 | processors (MPC8548, MPC8641, etc). | |
1003 | ||
14cf11af PM |
1004 | endmenu |
1005 | ||
0f890c8d SP |
1006 | config NONSTATIC_KERNEL |
1007 | bool | |
0f890c8d | 1008 | |
14cf11af PM |
1009 | menu "Advanced setup" |
1010 | depends on PPC32 | |
1011 | ||
1012 | config ADVANCED_OPTIONS | |
1013 | bool "Prompt for advanced kernel configuration options" | |
1014 | help | |
1015 | This option will enable prompting for a variety of advanced kernel | |
1016 | configuration options. These options can cause the kernel to not | |
1017 | work if they are set incorrectly, but can be used to optimize certain | |
1018 | aspects of kernel memory management. | |
1019 | ||
1020 | Unless you know what you are doing, say N here. | |
1021 | ||
1022 | comment "Default settings for advanced configuration options are used" | |
1023 | depends on !ADVANCED_OPTIONS | |
1024 | ||
14cf11af PM |
1025 | config LOWMEM_SIZE_BOOL |
1026 | bool "Set maximum low memory" | |
1027 | depends on ADVANCED_OPTIONS | |
1028 | help | |
1029 | This option allows you to set the maximum amount of memory which | |
1030 | will be used as "low memory", that is, memory which the kernel can | |
1031 | access directly, without having to set up a kernel virtual mapping. | |
1032 | This can be useful in optimizing the layout of kernel virtual | |
1033 | memory. | |
1034 | ||
1035 | Say N here unless you know what you are doing. | |
1036 | ||
1037 | config LOWMEM_SIZE | |
1038 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
1039 | default "0x30000000" | |
1040 | ||
96051465 TP |
1041 | config LOWMEM_CAM_NUM_BOOL |
1042 | bool "Set number of CAMs to use to map low memory" | |
1043 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
1044 | help | |
1045 | This option allows you to set the maximum number of CAM slots that | |
1046 | will be used to map low memory. There are a limited number of slots | |
1047 | available and even more limited number that will fit in the L1 MMU. | |
1048 | However, using more entries will allow mapping more low memory. This | |
1049 | can be useful in optimizing the layout of kernel virtual memory. | |
1050 | ||
1051 | Say N here unless you know what you are doing. | |
1052 | ||
1053 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 1054 | depends on FSL_BOOKE |
96051465 TP |
1055 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
1056 | default 3 | |
1057 | ||
0f890c8d | 1058 | config DYNAMIC_MEMSTART |
642e56ff KC |
1059 | bool "Enable page aligned dynamic load address for kernel" |
1060 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) | |
0f890c8d SP |
1061 | select NONSTATIC_KERNEL |
1062 | help | |
1063 | This option enables the kernel to be loaded at any page aligned | |
4f44e8ae | 1064 | physical address. The kernel creates a mapping from KERNELBASE to |
0f890c8d SP |
1065 | the address where the kernel is loaded. The page size here implies |
1066 | the TLB page size of the mapping for kernel on the particular platform. | |
1067 | Please refer to the init code for finding the TLB page size. | |
1068 | ||
1069 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
1070 | kernel image, where the only restriction is the page aligned kernel | |
4f44e8ae | 1071 | load address. When this option is enabled, the compile time physical |
0f890c8d SP |
1072 | address CONFIG_PHYSICAL_START is ignored. |
1073 | ||
9c5f7d39 SP |
1074 | This option is overridden by CONFIG_RELOCATABLE |
1075 | ||
37dd2bad KG |
1076 | config PAGE_OFFSET_BOOL |
1077 | bool "Set custom page offset address" | |
1078 | depends on ADVANCED_OPTIONS | |
1079 | help | |
1080 | This option allows you to set the kernel virtual address at which | |
1081 | the kernel will map low memory. This can be useful in optimizing | |
1082 | the virtual memory layout of the system. | |
1083 | ||
1084 | Say N here unless you know what you are doing. | |
1085 | ||
1086 | config PAGE_OFFSET | |
1087 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
1088 | default "0xc0000000" | |
1089 | ||
14cf11af PM |
1090 | config KERNEL_START_BOOL |
1091 | bool "Set custom kernel base address" | |
1092 | depends on ADVANCED_OPTIONS | |
1093 | help | |
1094 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
1095 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
1096 | however there are times (like kdump) that one might not want them | |
1097 | to be the same. | |
14cf11af PM |
1098 | |
1099 | Say N here unless you know what you are doing. | |
1100 | ||
1101 | config KERNEL_START | |
1102 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 1103 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
0f890c8d | 1104 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
14cf11af PM |
1105 | default "0xc0000000" |
1106 | ||
37dd2bad KG |
1107 | config PHYSICAL_START_BOOL |
1108 | bool "Set physical address where the kernel is loaded" | |
1109 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
1110 | help | |
1111 | This gives the physical address where the kernel is loaded. | |
1112 | ||
1113 | Say N here unless you know what you are doing. | |
1114 | ||
1115 | config PHYSICAL_START | |
1116 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
26598f28 | 1117 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
37dd2bad KG |
1118 | default "0x00000000" |
1119 | ||
1120 | config PHYSICAL_ALIGN | |
1121 | hex | |
c8f3570b | 1122 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
1123 | help |
1124 | This value puts the alignment restrictions on physical address | |
1125 | where kernel is loaded and run from. Kernel is compiled for an | |
1126 | address which meets above alignment restriction. | |
1127 | ||
14cf11af PM |
1128 | config TASK_SIZE_BOOL |
1129 | bool "Set custom user task size" | |
1130 | depends on ADVANCED_OPTIONS | |
1131 | help | |
1132 | This option allows you to set the amount of virtual address space | |
1133 | allocated to user tasks. This can be useful in optimizing the | |
1134 | virtual memory layout of the system. | |
1135 | ||
1136 | Say N here unless you know what you are doing. | |
1137 | ||
1138 | config TASK_SIZE | |
1139 | hex "Size of user task space" if TASK_SIZE_BOOL | |
933ee711 | 1140 | default "0x80000000" if PPC_8xx |
4d9e5510 | 1141 | default "0xc0000000" |
14cf11af | 1142 | |
84532a0f BH |
1143 | config CONSISTENT_SIZE_BOOL |
1144 | bool "Set custom consistent memory pool size" | |
1145 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
1146 | help | |
1147 | This option allows you to set the size of the | |
1148 | consistent memory pool. This pool of virtual memory | |
1149 | is used to make consistent memory allocations. | |
1150 | ||
1151 | config CONSISTENT_SIZE | |
1152 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
1153 | default "0x00200000" if NOT_COHERENT_CACHE | |
1154 | ||
14cf11af PM |
1155 | config PIN_TLB |
1156 | bool "Pinned Kernel TLBs (860 ONLY)" | |
87be3e2d CL |
1157 | depends on ADVANCED_OPTIONS && PPC_8xx && \ |
1158 | !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX | |
62f64b49 | 1159 | |
a3059b0c CL |
1160 | config PIN_TLB_DATA |
1161 | bool "Pinned TLB for DATA" | |
1162 | depends on PIN_TLB | |
1163 | default y | |
62f64b49 CL |
1164 | |
1165 | config PIN_TLB_IMMR | |
1166 | bool "Pinned TLB for IMMR" | |
96d19d70 | 1167 | depends on PIN_TLB || PPC_EARLY_DEBUG_CPM |
62f64b49 | 1168 | default y |
a3059b0c CL |
1169 | |
1170 | config PIN_TLB_TEXT | |
1171 | bool "Pinned TLB for TEXT" | |
1172 | depends on PIN_TLB | |
1173 | default y | |
14cf11af PM |
1174 | endmenu |
1175 | ||
cabb5587 | 1176 | if PPC64 |
bdbc29c1 | 1177 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
37dd2bad KG |
1178 | config PAGE_OFFSET |
1179 | hex | |
1180 | default "0xc000000000000000" | |
cabb5587 SR |
1181 | config KERNEL_START |
1182 | hex | |
eeb2d218 | 1183 | default "0xc000000000000000" |
37dd2bad KG |
1184 | config PHYSICAL_START |
1185 | hex | |
37dd2bad | 1186 | default "0x00000000" |
cabb5587 SR |
1187 | endif |
1188 | ||
a4da0d50 ME |
1189 | config ARCH_RANDOM |
1190 | def_bool n | |
1191 | ||
1088a209 SM |
1192 | config PPC_LIB_RHEAP |
1193 | bool | |
1194 | ||
bbf45ba5 | 1195 | source "arch/powerpc/kvm/Kconfig" |
85baa095 ME |
1196 | |
1197 | source "kernel/livepatch/Kconfig" |