Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
a0ae9c7c | 2 | source "arch/powerpc/platforms/Kconfig.cputype" |
17e638bc | 3 | |
234a71a7 | 4 | config 32BIT |
5 | bool | |
6 | default y if PPC32 | |
7 | ||
14cf11af PM |
8 | config 64BIT |
9 | bool | |
10 | default y if PPC64 | |
11 | ||
14cf11af PM |
12 | config MMU |
13 | bool | |
14 | default y | |
15 | ||
9fea59bd ME |
16 | config ARCH_MMAP_RND_BITS_MAX |
17 | # On Book3S 64, the default virtual address space for 64-bit processes | |
18 | # is 2^47 (128TB). As a maximum, allow randomisation to consume up to | |
19 | # 32T of address space (2^45), which should ensure a reasonable gap | |
20 | # between bottom-up and top-down allocations for applications that | |
21 | # consume "normal" amounts of address space. Book3S 64 only supports 64K | |
22 | # and 4K page sizes. | |
23 | default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) | |
24 | default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) | |
25 | # | |
26 | # On all other 64-bit platforms (currently only Book3E), the virtual | |
27 | # address space is 2^46 (64TB). Allow randomisation to consume up to 16T | |
28 | # of address space (2^44). Only 4K page sizes are supported. | |
29 | default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) | |
30 | # | |
31 | # For 32-bit, use the compat values, as they're the same. | |
32 | default ARCH_MMAP_RND_COMPAT_BITS_MAX | |
33 | ||
34 | config ARCH_MMAP_RND_BITS_MIN | |
35 | # Allow randomisation to consume up to 1GB of address space (2^30). | |
36 | default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) | |
37 | default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) | |
38 | # | |
39 | # For 32-bit, use the compat values, as they're the same. | |
40 | default ARCH_MMAP_RND_COMPAT_BITS_MIN | |
41 | ||
42 | config ARCH_MMAP_RND_COMPAT_BITS_MAX | |
43 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
44 | # Allow randomisation to consume up to 512MB of address space (2^29). | |
45 | default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) | |
46 | default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) | |
4f44e8ae | 47 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
9fea59bd ME |
48 | default 17 # 17 = 29 (512MB) - 12 (4K) |
49 | ||
50 | config ARCH_MMAP_RND_COMPAT_BITS_MIN | |
51 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
52 | # Allow randomisation to consume up to 8MB of address space (2^23). | |
53 | default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) | |
54 | default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) | |
55 | default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) | |
56 | default 11 # 11 = 23 (8MB) - 12 (4K) | |
57 | ||
c2a7e818 | 58 | config HAVE_SETUP_PER_CPU_AREA |
e74e3962 TH |
59 | def_bool PPC64 |
60 | ||
c2a7e818 | 61 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
eb553f16 AK |
62 | def_bool y if PPC64 |
63 | ||
64 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
65 | def_bool y if PPC64 | |
b32ef636 | 66 | |
551b81f2 ME |
67 | config NR_IRQS |
68 | int "Number of virtual interrupt numbers" | |
859aefc5 | 69 | range 32 32768 |
551b81f2 ME |
70 | default "512" |
71 | help | |
72 | This defines the number of virtual interrupt numbers the kernel | |
73 | can manage. Virtual interrupt numbers are what you see in | |
74 | /proc/interrupts. If you configure your system to have too few, | |
75 | drivers will fail to load or worse - handle with care. | |
76 | ||
ddd703ca NP |
77 | config NMI_IPI |
78 | bool | |
2104180a | 79 | depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
ddd703ca NP |
80 | default y |
81 | ||
75eb767e NP |
82 | config PPC_WATCHDOG |
83 | bool | |
84 | depends on HARDLOCKUP_DETECTOR | |
85 | depends on HAVE_HARDLOCKUP_DETECTOR_ARCH | |
86 | default y | |
87 | help | |
88 | This is a placeholder when the powerpc hardlockup detector | |
89 | watchdog is selected (arch/powerpc/kernel/watchdog.c). It is | |
90 | seleted via the generic lockup detector menu which is why we | |
91 | have no standalone config option for it here. | |
92 | ||
fd3e0bbc CH |
93 | config STACKTRACE_SUPPORT |
94 | bool | |
95 | default y | |
96 | ||
945feb17 BH |
97 | config TRACE_IRQFLAGS_SUPPORT |
98 | bool | |
945feb17 BH |
99 | default y |
100 | ||
101 | config LOCKDEP_SUPPORT | |
102 | bool | |
103 | default y | |
104 | ||
95c354fe NP |
105 | config GENERIC_LOCKBREAK |
106 | bool | |
107 | default y | |
fdc5569e | 108 | depends on SMP && PREEMPTION |
95c354fe | 109 | |
e779b2f9 AM |
110 | config GENERIC_HWEIGHT |
111 | bool | |
112 | default y | |
113 | ||
14cf11af PM |
114 | config PPC |
115 | bool | |
116 | default y | |
a7d2475a ME |
117 | # |
118 | # Please keep this list sorted alphabetically. | |
119 | # | |
942fa985 | 120 | select ARCH_32BIT_OFF_T if PPC32 |
6bf752da | 121 | select ARCH_HAS_DEBUG_VIRTUAL |
a7d2475a | 122 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
a7d2475a | 123 | select ARCH_HAS_ELF_RANDOMIZE |
6974f0c4 | 124 | select ARCH_HAS_FORTIFY_SOURCE |
a7d2475a | 125 | select ARCH_HAS_GCOV_PROFILE_ALL |
fb0b0a73 | 126 | select ARCH_HAS_KCOV |
cbd34da7 | 127 | select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
9ffc1d19 | 128 | select ARCH_HAS_MEMREMAP_COMPAT_ALIGN |
420af155 | 129 | select ARCH_HAS_MMIOWB if PPC64 |
ea8c64ac | 130 | select ARCH_HAS_PHYS_TO_DMA |
461cef2a | 131 | select ARCH_HAS_PMEM_API |
d195b1d1 | 132 | select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
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 |
2384b36f | 136 | select ARCH_HAS_MEMBARRIER_SYNC_CORE |
b4645ffc | 137 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
8659a0e0 | 138 | select ARCH_HAS_STRICT_KERNEL_RWX if (PPC32 && !HIBERNATION) |
a7d2475a | 139 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
461cef2a | 140 | select ARCH_HAS_UACCESS_FLUSHCACHE |
ec6347bb | 141 | select ARCH_HAS_COPY_MC if PPC64 |
a7d2475a ME |
142 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
143 | select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
350e88ba | 144 | select ARCH_KEEP_MEMBLOCK |
b7e7c37b | 145 | select ARCH_MIGHT_HAVE_PC_PARPORT |
c74e6d3d | 146 | select ARCH_MIGHT_HAVE_PC_SERIO |
4ec591e5 | 147 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
a7d2475a | 148 | select ARCH_SUPPORTS_ATOMIC_RMW |
a7d2475a ME |
149 | select ARCH_USE_BUILTIN_BSWAP |
150 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
aa65ff6b NP |
151 | select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS |
152 | select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS | |
a7d2475a | 153 | select ARCH_WANT_IPC_PARSE_VERSION |
66acd460 | 154 | select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
77e58496 | 155 | select ARCH_WEAK_RELEASE_ACQUIRE |
d812c0e1 | 156 | select BINFMT_ELF |
10916706 | 157 | select BUILDTIME_TABLE_SORT |
a7d2475a ME |
158 | select CLONE_BACKWARDS |
159 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN | |
2f9237d4 | 160 | select DMA_OPS if PPC64 |
f1565c24 | 161 | select DMA_OPS_BYPASS if PPC64 |
0c0c5230 | 162 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
a7d2475a ME |
163 | select EDAC_ATOMIC_SCRUB |
164 | select EDAC_SUPPORT | |
165 | select GENERIC_ATOMIC64 if PPC32 | |
166 | select GENERIC_CLOCKEVENTS | |
167 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP | |
168 | select GENERIC_CMOS_UPDATE | |
169 | select GENERIC_CPU_AUTOPROBE | |
179ab1cb | 170 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
265c3491 | 171 | select GENERIC_EARLY_IOREMAP |
a7d2475a ME |
172 | select GENERIC_IRQ_SHOW |
173 | select GENERIC_IRQ_SHOW_LEVEL | |
eb01d42a | 174 | select GENERIC_PCI_IOMAP if PCI |
a7d2475a ME |
175 | select GENERIC_SMP_IDLE_THREAD |
176 | select GENERIC_STRNCPY_FROM_USER | |
177 | select GENERIC_STRNLEN_USER | |
d4cfb113 | 178 | select GENERIC_TIME_VSYSCALL |
a7d2475a | 179 | select HAVE_ARCH_AUDITSYSCALL |
d909f910 | 180 | select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU |
a7d2475a | 181 | select HAVE_ARCH_JUMP_LABEL |
888468ce CL |
182 | select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 |
183 | select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14 | |
a7d2475a | 184 | select HAVE_ARCH_KGDB |
9fea59bd ME |
185 | select HAVE_ARCH_MMAP_RND_BITS |
186 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
20e07af7 | 187 | select HAVE_ARCH_NVRAM_OPS |
a7d2475a ME |
188 | select HAVE_ARCH_SECCOMP_FILTER |
189 | select HAVE_ARCH_TRACEHOOK | |
2ff2b7ec | 190 | select HAVE_ASM_MODVERSIONS |
f079bb3c | 191 | select HAVE_C_RECORDMCOUNT |
a7d2475a | 192 | select HAVE_CBPF_JIT if !PPC64 |
bf6cbd0c ME |
193 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) |
194 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) | |
a7d2475a | 195 | select HAVE_CONTEXT_TRACKING if PPC64 |
490f561b | 196 | select HAVE_TIF_NOHZ if PPC64 |
a7d2475a ME |
197 | select HAVE_DEBUG_KMEMLEAK |
198 | select HAVE_DEBUG_STACKOVERFLOW | |
2b79d696 | 199 | select HAVE_DYNAMIC_FTRACE |
a7d2475a ME |
200 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
201 | select HAVE_EBPF_JIT if PPC64 | |
202 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) | |
67a929e0 | 203 | select HAVE_FAST_GUP |
a7d2475a | 204 | select HAVE_FTRACE_MCOUNT_RECORD |
7cd01b08 | 205 | select HAVE_FUNCTION_ERROR_INJECTION |
60ce8f72 | 206 | select HAVE_FUNCTION_GRAPH_TRACER |
a7d2475a | 207 | select HAVE_FUNCTION_TRACER |
8034c2fb | 208 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
a7d2475a | 209 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
ec7748b5 | 210 | select HAVE_IDE |
a1f242ff | 211 | select HAVE_IOREMAP_PROT |
a7d2475a ME |
212 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
213 | select HAVE_KERNEL_GZIP | |
1cc9a21b | 214 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
264bffad | 215 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
423bfc69 | 216 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
3f550096 | 217 | select HAVE_KPROBES |
ead514d5 | 218 | select HAVE_KPROBES_ON_FTRACE |
9edddaa2 | 219 | select HAVE_KRETPROBES |
4c1d9bb0 | 220 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
a7d2475a | 221 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
a7d2475a | 222 | select HAVE_MOD_ARCH_SPECIFIC |
2104180a NP |
223 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
224 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) | |
4e491d14 | 225 | select HAVE_OPROFILE |
a7d2475a | 226 | select HAVE_OPTPROBES if PPC64 |
cdd6c482 | 227 | select HAVE_PERF_EVENTS |
a7d2475a | 228 | select HAVE_PERF_EVENTS_NMI if PPC64 |
92e5aae4 | 229 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH |
ed4a4ef8 | 230 | select HAVE_PERF_REGS |
17ed7c38 | 231 | select HAVE_PERF_USER_STACK_DUMP |
ff2e6d72 | 232 | select MMU_GATHER_RCU_TABLE_FREE |
3af4bd03 | 233 | select MMU_GATHER_PAGE_SIZE |
359e4284 | 234 | select HAVE_REGS_AND_STACK_ACCESS_API |
a50d3250 | 235 | select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN |
a7d2475a ME |
236 | select HAVE_SYSCALL_TRACEPOINTS |
237 | select HAVE_VIRT_CPU_ACCOUNTING | |
518470fe | 238 | select HAVE_IRQ_TIME_ACCOUNTING |
8a417c48 | 239 | select HAVE_RSEQ |
a4ce5a48 | 240 | select IOMMU_HELPER if PPC64 |
cc79ca69 | 241 | select IRQ_DOMAIN |
e8d2c473 | 242 | select IRQ_FORCED_THREADING |
786d35d4 | 243 | select MODULES_USE_ELF_RELA |
06832fc0 | 244 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
86596f0a | 245 | select NEED_SG_DMA_LENGTH |
a7d2475a | 246 | select OF |
dabf6b36 | 247 | select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
a7d2475a | 248 | select OF_EARLY_FLATTREE |
a7d2475a ME |
249 | select OLD_SIGACTION if PPC32 |
250 | select OLD_SIGSUSPEND | |
2eac9c2d | 251 | select PCI_DOMAINS if PCI |
981aa1d3 | 252 | select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
20f1b79d | 253 | select PCI_SYSCALL if PCI |
a278e7ea | 254 | select PPC_DAWR if PPC64 |
6e8cef38 | 255 | select RTC_LIB |
a7d2475a ME |
256 | select SPARSE_IRQ |
257 | select SYSCTL_EXCEPTION_TRACE | |
ed1cd6de | 258 | select THREAD_INFO_IN_TASK |
a7d2475a ME |
259 | select VIRT_TO_BUS if !PPC64 |
260 | # | |
261 | # Please keep this list sorted alphabetically. | |
262 | # | |
14cf11af | 263 | |
179ab1cb | 264 | config PPC_BARRIER_NOSPEC |
4f44e8ae EWI |
265 | bool |
266 | default y | |
267 | depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E | |
179ab1cb | 268 | |
14cf11af PM |
269 | config EARLY_PRINTK |
270 | bool | |
51d3082f | 271 | default y |
14cf11af | 272 | |
b71d47c1 JB |
273 | config PANIC_TIMEOUT |
274 | int | |
275 | default 180 | |
276 | ||
14cf11af | 277 | config COMPAT |
6e944aed MS |
278 | bool "Enable support for 32bit binaries" |
279 | depends on PPC64 | |
280 | default y if !CPU_LITTLE_ENDIAN | |
01e31dba | 281 | select COMPAT_BINFMT_ELF |
48b25c43 | 282 | select ARCH_WANT_OLD_COMPAT_IPC |
09a4d5d0 | 283 | select COMPAT_OLD_SIGACTION |
14cf11af PM |
284 | |
285 | config SYSVIPC_COMPAT | |
286 | bool | |
287 | depends on COMPAT && SYSVIPC | |
288 | default y | |
289 | ||
ae1e9130 | 290 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
291 | bool |
292 | default y | |
293 | ||
294 | config ARCH_MAY_HAVE_PC_FDC | |
295 | bool | |
3484a31f | 296 | default PCI |
14cf11af | 297 | |
08264cbc KG |
298 | config PPC_UDBG_16550 |
299 | bool | |
08264cbc | 300 | |
08264cbc KG |
301 | config GENERIC_TBSYNC |
302 | bool | |
303 | default y if PPC32 && SMP | |
08264cbc | 304 | |
e65e1fc2 AV |
305 | config AUDIT_ARCH |
306 | bool | |
307 | default y | |
308 | ||
73c9ceab JF |
309 | config GENERIC_BUG |
310 | bool | |
311 | default y | |
312 | depends on BUG | |
313 | ||
b3028878 | 314 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 315 | default y if PMAC_APM_EMU |
b3028878 JB |
316 | bool |
317 | ||
6c5b59b9 DG |
318 | config EPAPR_BOOT |
319 | bool | |
320 | help | |
321 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
6c5b59b9 | 322 | |
f4fc4a5b KG |
323 | config DEFAULT_UIMAGE |
324 | bool | |
325 | help | |
326 | Used to allow a board to specify it wants a uImage built by default | |
f4fc4a5b | 327 | |
801e4062 JB |
328 | config ARCH_HIBERNATION_POSSIBLE |
329 | bool | |
543b9fd3 JB |
330 | default y |
331 | ||
f4cb5700 JB |
332 | config ARCH_SUSPEND_POSSIBLE |
333 | def_bool y | |
4ffd6952 | 334 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
d0832a75 ZC |
335 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
336 | || 44x || 40x | |
f4cb5700 | 337 | |
9ca12ac0 NP |
338 | config ARCH_SUSPEND_NONZERO_CPU |
339 | def_bool y | |
340 | depends on PPC_POWERNV || PPC_PSERIES | |
341 | ||
4c75a6f4 BH |
342 | config PPC_DCR_NATIVE |
343 | bool | |
4c75a6f4 BH |
344 | |
345 | config PPC_DCR_MMIO | |
346 | bool | |
4c75a6f4 BH |
347 | |
348 | config PPC_DCR | |
349 | bool | |
350 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
351 | default y | |
352 | ||
4c9d2800 BH |
353 | config PPC_OF_PLATFORM_PCI |
354 | bool | |
373a6da1 | 355 | depends on PCI |
4c9d2800 | 356 | depends on PPC64 # not supported on 32 bits yet |
4c9d2800 | 357 | |
6a11f75b | 358 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
4e003747 | 359 | depends on PPC32 || PPC_BOOK3S_64 |
6a11f75b AM |
360 | def_bool y |
361 | ||
8b7b80b9 AM |
362 | config ARCH_SUPPORTS_UPROBES |
363 | def_bool y | |
364 | ||
172ae2e7 DK |
365 | config PPC_ADV_DEBUG_REGS |
366 | bool | |
367 | depends on 40x || BOOKE | |
368 | default y | |
369 | ||
370 | config PPC_ADV_DEBUG_IACS | |
371 | int | |
372 | depends on PPC_ADV_DEBUG_REGS | |
373 | default 4 if 44x | |
374 | default 2 | |
375 | ||
376 | config PPC_ADV_DEBUG_DACS | |
377 | int | |
378 | depends on PPC_ADV_DEBUG_REGS | |
379 | default 2 | |
380 | ||
381 | config PPC_ADV_DEBUG_DVCS | |
382 | int | |
383 | depends on PPC_ADV_DEBUG_REGS | |
384 | default 2 if 44x | |
385 | default 0 | |
386 | ||
387 | config PPC_ADV_DEBUG_DAC_RANGE | |
388 | bool | |
389 | depends on PPC_ADV_DEBUG_REGS && 44x | |
390 | default y | |
391 | ||
a278e7ea MN |
392 | config PPC_DAWR |
393 | bool | |
394 | ||
25078dc1 | 395 | config ZONE_DMA |
1c98025c | 396 | bool |
25078dc1 | 397 | default y if PPC_BOOK3E_64 |
1c98025c | 398 | |
06ef42a1 KS |
399 | config PGTABLE_LEVELS |
400 | int | |
401 | default 2 if !PPC64 | |
06ef42a1 KS |
402 | default 4 |
403 | ||
a2d2e1ec | 404 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 405 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 406 | |
14cf11af PM |
407 | menu "Kernel options" |
408 | ||
409 | config HIGHMEM | |
410 | bool "High memory support" | |
411 | depends on PPC32 | |
412 | ||
8636a1f9 | 413 | source "kernel/Kconfig.hz" |
14cf11af | 414 | |
ba72cb8c MG |
415 | config HUGETLB_PAGE_SIZE_VARIABLE |
416 | bool | |
c5710cd2 | 417 | depends on HUGETLB_PAGE && PPC_BOOK3S_64 |
ba72cb8c MG |
418 | default y |
419 | ||
14cf11af PM |
420 | config MATH_EMULATION |
421 | bool "Math emulation" | |
968159c0 | 422 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE |
4f44e8ae | 423 | help |
14cf11af PM |
424 | Some PowerPC chips designed for embedded applications do not have |
425 | a floating-point unit and therefore do not implement the | |
426 | floating-point instructions in the PowerPC instruction set. If you | |
427 | say Y here, the kernel will include code to emulate a floating-point | |
428 | unit, which will allow programs that use floating-point | |
429 | instructions to run. | |
430 | ||
4e63f8ed BH |
431 | This is also useful to emulate missing (optional) instructions |
432 | such as fsqrt on cores that do have an FPU but do not implement | |
433 | them (such as Freescale BookE). | |
434 | ||
e05c0e81 KH |
435 | choice |
436 | prompt "Math emulation options" | |
437 | default MATH_EMULATION_FULL | |
438 | depends on MATH_EMULATION | |
439 | ||
440 | config MATH_EMULATION_FULL | |
441 | bool "Emulate all the floating point instructions" | |
4f44e8ae | 442 | help |
e05c0e81 KH |
443 | Select this option will enable the kernel to support to emulate |
444 | all the floating point instructions. If your SoC doesn't have | |
445 | a FPU, you should select this. | |
446 | ||
447 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
448 | bool "Just emulate the FPU unimplemented instructions" | |
4f44e8ae | 449 | help |
e05c0e81 KH |
450 | Select this if you know there does have a hardware FPU on your |
451 | SoC, but some floating point instructions are not implemented by that. | |
452 | ||
453 | endchoice | |
454 | ||
3d72bbc4 | 455 | config PPC_TRANSACTIONAL_MEM |
4f44e8ae EWI |
456 | bool "Transactional Memory support for POWERPC" |
457 | depends on PPC_BOOK3S_64 | |
458 | depends on SMP | |
459 | select ALTIVEC | |
460 | select VSX | |
461 | help | |
462 | Support user-mode Transactional Memory on POWERPC. | |
3d72bbc4 | 463 | |
013a53f2 AK |
464 | config PPC_UV |
465 | bool "Ultravisor support" | |
466 | depends on KVM_BOOK3S_HV_POSSIBLE | |
a2db55dd | 467 | depends on DEVICE_PRIVATE |
013a53f2 AK |
468 | default n |
469 | help | |
470 | This option paravirtualizes the kernel to run in POWER platforms that | |
471 | supports the Protected Execution Facility (PEF). On such platforms, | |
472 | the ultravisor firmware runs at a privilege level above the | |
473 | hypervisor. | |
474 | ||
475 | If unsure, say "N". | |
476 | ||
951eedeb NP |
477 | config LD_HEAD_STUB_CATCH |
478 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT | |
479 | depends on PPC64 | |
951eedeb NP |
480 | help |
481 | Very large kernels can cause linker branch stubs to be generated by | |
482 | code in head_64.S, which moves the head text sections out of their | |
483 | specified location. This option can work around the problem. | |
484 | ||
485 | If unsure, say "N". | |
486 | ||
8c50b72a | 487 | config MPROFILE_KERNEL |
57b3ed94 | 488 | depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER |
abba7597 | 489 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
8c50b72a | 490 | |
14cf11af PM |
491 | config HOTPLUG_CPU |
492 | bool "Support for enabling/disabling CPUs" | |
40b31360 | 493 | depends on SMP && (PPC_PSERIES || \ |
76be4414 | 494 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
4f44e8ae | 495 | help |
14cf11af PM |
496 | Say Y here to be able to disable and re-enable individual |
497 | CPUs at runtime on SMP machines. | |
498 | ||
499 | Say N if you are unsure. | |
500 | ||
aa65ff6b NP |
501 | config PPC_QUEUED_SPINLOCKS |
502 | bool "Queued spinlocks" | |
503 | depends on SMP | |
504 | help | |
505 | Say Y here to use queued spinlocks which give better scalability and | |
506 | fairness on large SMP and NUMA systems without harming single threaded | |
507 | performance. | |
508 | ||
509 | This option is currently experimental, the code is more complex and | |
510 | less tested so it defaults to "N" for the moment. | |
511 | ||
512 | If unsure, say "N". | |
513 | ||
12633e80 NF |
514 | config ARCH_CPU_PROBE_RELEASE |
515 | def_bool y | |
516 | depends on HOTPLUG_CPU | |
517 | ||
cc57637b YG |
518 | config ARCH_ENABLE_MEMORY_HOTPLUG |
519 | def_bool y | |
520 | ||
1482471d BP |
521 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
522 | def_bool y | |
523 | ||
f2296a3d MS |
524 | config PPC64_SUPPORTS_MEMORY_FAILURE |
525 | bool "Add support for memory hwpoison" | |
526 | depends on PPC_BOOK3S_64 | |
527 | default "y" if PPC_POWERNV | |
528 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
529 | ||
14cf11af | 530 | config KEXEC |
642e56ff | 531 | bool "kexec system call" |
96eea642 | 532 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
2965faa5 | 533 | select KEXEC_CORE |
14cf11af PM |
534 | help |
535 | kexec is a system call that implements the ability to shutdown your | |
536 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 537 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
538 | you can start any kernel with it, not just Linux. |
539 | ||
1f1332f7 | 540 | The name comes from the similarity to the exec system call. |
14cf11af PM |
541 | |
542 | It is an ongoing process to be certain the hardware in a machine | |
543 | is properly shutdown, so do not be surprised if this code does not | |
bf220695 GU |
544 | initially work for you. As of this writing the exact hardware |
545 | interface is strongly in flux, so no good recommendation can be | |
546 | made. | |
14cf11af | 547 | |
80f60e50 TJB |
548 | config KEXEC_FILE |
549 | bool "kexec file based system call" | |
550 | select KEXEC_CORE | |
467d2782 | 551 | select HAVE_IMA_KEXEC |
80f60e50 | 552 | select BUILD_BIN2C |
175fca3b | 553 | select KEXEC_ELF |
80f60e50 TJB |
554 | depends on PPC64 |
555 | depends on CRYPTO=y | |
556 | depends on CRYPTO_SHA256=y | |
557 | help | |
558 | This is a new version of the kexec system call. This call is | |
559 | file based and takes in file descriptors as system call arguments | |
560 | for kernel and initramfs as opposed to a list of segments as is the | |
561 | case for the older kexec call. | |
562 | ||
b799a09f AT |
563 | config ARCH_HAS_KEXEC_PURGATORY |
564 | def_bool KEXEC_FILE | |
565 | ||
4c91bd6e KH |
566 | config RELOCATABLE |
567 | bool "Build a relocatable kernel" | |
084a275e | 568 | depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
4c91bd6e | 569 | select NONSTATIC_KERNEL |
71810db2 | 570 | select MODULE_REL_CRCS if MODVERSIONS |
4c91bd6e KH |
571 | help |
572 | This builds a kernel image that is capable of running at the | |
573 | location the kernel is loaded at. For ppc32, there is no any | |
574 | alignment restrictions, and this feature is a superset of | |
575 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use | |
576 | 16k-aligned base address. The kernel is linked as a | |
577 | position-independent executable (PIE) and contains dynamic relocations | |
578 | which are processed early in the bootup process. | |
579 | ||
580 | One use is for the kexec on panic case where the recovery kernel | |
581 | must live at a different physical address than the primary | |
582 | kernel. | |
583 | ||
584 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
585 | it has been loaded at and the compile time physical addresses | |
586 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
587 | setting can still be useful to bootwrappers that need to know the | |
588 | load address of the kernel (eg. u-boot/mkimage). | |
589 | ||
2b0e86cc JY |
590 | config RANDOMIZE_BASE |
591 | bool "Randomize the address of the kernel image" | |
592 | depends on (FSL_BOOKE && FLATMEM && PPC32) | |
593 | depends on RELOCATABLE | |
594 | help | |
595 | Randomizes the virtual address at which the kernel image is | |
596 | loaded, as a security feature that deters exploit attempts | |
597 | relying on knowledge of the location of kernel internals. | |
598 | ||
599 | If unsure, say Y. | |
600 | ||
70839d20 NP |
601 | config RELOCATABLE_TEST |
602 | bool "Test relocatable kernel" | |
603 | depends on (PPC64 && RELOCATABLE) | |
70839d20 NP |
604 | help |
605 | This runs the relocatable kernel at the address it was initially | |
606 | loaded at, which tends to be non-zero and therefore test the | |
607 | relocation code. | |
608 | ||
e8625d46 | 609 | config CRASH_DUMP |
22bd0177 | 610 | bool "Build a dump capture kernel" |
be34fff0 | 611 | depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
084a275e | 612 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
e8625d46 | 613 | help |
22bd0177 | 614 | Build a kernel suitable for use as a dump capture kernel. |
54622f10 MK |
615 | The same kernel binary can be used as production kernel and dump |
616 | capture kernel. | |
e8625d46 | 617 | |
eb39c880 MS |
618 | config FA_DUMP |
619 | bool "Firmware-assisted dump" | |
41df5928 | 620 | depends on PPC64 && (PPC_RTAS || PPC_POWERNV) |
22bd0177 HB |
621 | select CRASH_CORE |
622 | select CRASH_DUMP | |
242f271c | 623 | help |
eb39c880 MS |
624 | A robust mechanism to get reliable kernel crash dump with |
625 | assistance from firmware. This approach does not use kexec, | |
22bd0177 | 626 | instead firmware assists in booting the capture kernel |
eb39c880 MS |
627 | while preserving memory contents. Firmware-assisted dump |
628 | is meant to be a kdump replacement offering robustness and | |
629 | speed not possible without system firmware assistance. | |
242f271c | 630 | |
41df5928 HB |
631 | If unsure, say "y". Only special kernels like petitboot may |
632 | need to say "N" here. | |
242f271c | 633 | |
bec53196 HB |
634 | config PRESERVE_FA_DUMP |
635 | bool "Preserve Firmware-assisted dump" | |
636 | depends on PPC64 && PPC_POWERNV && !FA_DUMP | |
637 | help | |
638 | On a kernel with FA_DUMP disabled, this option helps to preserve | |
639 | crash data from a previously crash'ed kernel. Useful when the next | |
640 | memory preserving kernel boot would process this crash data. | |
641 | Petitboot kernel is the typical usecase for this option. | |
642 | ||
6f713d18 HB |
643 | config OPAL_CORE |
644 | bool "Export OPAL memory as /sys/firmware/opal/core" | |
645 | depends on PPC64 && PPC_POWERNV | |
646 | help | |
647 | This option uses the MPIPL support in firmware to provide an | |
648 | ELF core of OPAL memory after a crash. The ELF core is exported | |
649 | as /sys/firmware/opal/core file which is helpful in debugging | |
650 | OPAL crashes using GDB. | |
242f271c | 651 | |
14cf11af PM |
652 | config IRQ_ALL_CPUS |
653 | bool "Distribute interrupts on all CPUs by default" | |
6cf09b9d | 654 | depends on SMP |
14cf11af PM |
655 | help |
656 | This option gives the kernel permission to distribute IRQs across | |
657 | multiple CPUs. Saying N here will route all IRQs to the first | |
658 | CPU. Generally saying Y is safe, although some problems have been | |
659 | reported with SMP Power Macintoshes with this option enabled. | |
660 | ||
ffa27b6b AW |
661 | config NUMA |
662 | bool "NUMA support" | |
663 | depends on PPC64 | |
664 | default y if SMP && PPC_PSERIES | |
665 | ||
c80d79d7 YG |
666 | config NODES_SHIFT |
667 | int | |
ea55bf29 | 668 | default "8" if PPC64 |
c80d79d7 YG |
669 | default "4" |
670 | depends on NEED_MULTIPLE_NODES | |
671 | ||
8c272261 NA |
672 | config USE_PERCPU_NUMA_NODE_ID |
673 | def_bool y | |
674 | depends on NUMA | |
675 | ||
64bb80d8 NA |
676 | config HAVE_MEMORYLESS_NODES |
677 | def_bool y | |
678 | depends on NUMA | |
679 | ||
14cf11af PM |
680 | config ARCH_SELECT_MEMORY_MODEL |
681 | def_bool y | |
682 | depends on PPC64 | |
683 | ||
684 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
685 | def_bool y |
686 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 687 | |
45fb6cea | 688 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 689 | def_bool y |
9100b205 | 690 | depends on PPC64 |
d29eff7b | 691 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 692 | |
45fb6cea | 693 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 694 | def_bool y |
7b3912f4 | 695 | depends on PPC_BOOK3S_64 |
14cf11af | 696 | |
5a1eb5c4 | 697 | config SYS_SUPPORTS_HUGETLBFS |
41151e77 | 698 | bool |
5a1eb5c4 | 699 | |
f6853eb5 ME |
700 | config ILLEGAL_POINTER_VALUE |
701 | hex | |
702 | # This is roughly half way between the top of user space and the bottom | |
703 | # of kernel space, which seems about as good as we can get. | |
704 | default 0x5deadbeef0000000 if PPC64 | |
705 | default 0 | |
706 | ||
7e9191da MK |
707 | config ARCH_MEMORY_PROBE |
708 | def_bool y | |
709 | depends on MEMORY_HOTPLUG | |
710 | ||
e1240122 YT |
711 | config STDBINUTILS |
712 | bool "Using standard binutils settings" | |
713 | depends on 44x | |
714 | default y | |
715 | help | |
716 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
717 | Note, that kernel will be able to run only those applications, | |
718 | which had been compiled using binutils later than 2.17.50.0.3 with | |
719 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
720 | the older binutils, you can patch them with a trivial patch, which | |
721 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
722 | ||
ca9153a3 IY |
723 | choice |
724 | prompt "Page size" | |
725 | default PPC_4K_PAGES | |
3c726f8d | 726 | help |
ca9153a3 IY |
727 | Select the kernel logical page size. Increasing the page size |
728 | will reduce software overhead at each page boundary, allow | |
729 | hardware prefetch mechanisms to be more effective, and allow | |
730 | larger dma transfers increasing IO efficiency and reducing | |
731 | overhead. However the utilization of memory will increase. | |
732 | For example, each cached file will using a multiple of the | |
733 | page size to hold its contents and the difference between the | |
734 | end of file and the end of page is wasted. | |
735 | ||
736 | Some dedicated systems, such as software raid serving with | |
737 | accelerated calculations, have shown significant increases. | |
738 | ||
739 | If you configure a 64 bit kernel for 64k pages but the | |
740 | processor does not support them, then the kernel will simulate | |
741 | them with 4k pages, loading them on demand, but with the | |
742 | reduced software overhead and larger internal fragmentation. | |
743 | For the 32 bit kernel, a large page option will not be offered | |
744 | unless it is supported by the configured processor. | |
745 | ||
746 | If unsure, choose 4K_PAGES. | |
747 | ||
748 | config PPC_4K_PAGES | |
749 | bool "4k page size" | |
19f97c98 | 750 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 IY |
751 | |
752 | config PPC_16K_PAGES | |
55f8b5b8 | 753 | bool "16k page size" |
55c8fc3f | 754 | depends on 44x || PPC_8xx |
ca9153a3 IY |
755 | |
756 | config PPC_64K_PAGES | |
55f8b5b8 | 757 | bool "64k page size" |
bba43630 | 758 | depends on 44x || PPC_BOOK3S_64 |
19f97c98 | 759 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 | 760 | |
e1240122 | 761 | config PPC_256K_PAGES |
55f8b5b8 ME |
762 | bool "256k page size" |
763 | depends on 44x && !STDBINUTILS | |
e1240122 YT |
764 | help |
765 | Make the page size 256k. | |
766 | ||
767 | As the ELF standard only requires alignment to support page | |
768 | sizes up to 64k, you will need to compile all of your user | |
769 | space applications with a non-standard binutils settings | |
770 | (see the STDBINUTILS description for details). | |
771 | ||
772 | Say N unless you know what you are doing. | |
773 | ||
ca9153a3 | 774 | endchoice |
3c726f8d | 775 | |
555f4fdb CL |
776 | config PPC_PAGE_SHIFT |
777 | int | |
778 | default 18 if PPC_256K_PAGES | |
779 | default 16 if PPC_64K_PAGES | |
780 | default 14 if PPC_16K_PAGES | |
781 | default 12 | |
782 | ||
47613407 HM |
783 | config THREAD_SHIFT |
784 | int "Thread shift" if EXPERT | |
785 | range 13 15 | |
786 | default "15" if PPC_256K_PAGES | |
787 | default "14" if PPC64 | |
edbadaf0 | 788 | default "14" if KASAN |
47613407 HM |
789 | default "13" |
790 | help | |
791 | Used to define the stack size. The default is almost always what you | |
792 | want. Only change this if you know what you are doing. | |
793 | ||
0f4a9041 | 794 | config DATA_SHIFT_BOOL |
da1adea0 | 795 | bool "Set custom data alignment" |
0f4a9041 | 796 | depends on ADVANCED_OPTIONS |
fcdafd10 CL |
797 | depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC |
798 | depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && \ | |
799 | (!PIN_TLB_TEXT || !STRICT_KERNEL_RWX)) | |
0f4a9041 CL |
800 | help |
801 | This option allows you to set the kernel data alignment. When | |
802 | RAM is mapped by blocks, the alignment needs to fit the size and | |
803 | number of possible blocks. The default should be OK for most configs. | |
804 | ||
805 | Say N here unless you know what you are doing. | |
166d97d9 CL |
806 | |
807 | config DATA_SHIFT | |
0f4a9041 | 808 | int "Data shift" if DATA_SHIFT_BOOL |
166d97d9 | 809 | default 24 if STRICT_KERNEL_RWX && PPC64 |
fcdafd10 CL |
810 | range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC) && PPC_BOOK3S_32 |
811 | range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC) && PPC_8xx | |
63b2bc61 | 812 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
2b279c03 | 813 | default 18 if DEBUG_PAGEALLOC && PPC_BOOK3S_32 |
8f54a6f7 | 814 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
fcdafd10 CL |
815 | default 23 if DEBUG_PAGEALLOC && PPC_8xx && PIN_TLB_DATA |
816 | default 19 if DEBUG_PAGEALLOC && PPC_8xx | |
166d97d9 | 817 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
818 | help |
819 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. | |
820 | Smaller is the alignment, greater is the number of necessary DBATs. | |
166d97d9 | 821 | |
8f54a6f7 CL |
822 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
823 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
da1adea0 CL |
824 | in that case. If PIN_TLB is selected, it must be aligned to 8M as |
825 | 8M pages will be pinned. | |
8f54a6f7 | 826 | |
53bcddb9 SR |
827 | config FORCE_MAX_ZONEORDER |
828 | int "Maximum zone order" | |
a7ee5395 | 829 | range 8 9 if PPC64 && PPC_64K_PAGES |
066c4b87 | 830 | default "9" if PPC64 && PPC_64K_PAGES |
d5a1e42c | 831 | range 13 13 if PPC64 && !PPC_64K_PAGES |
066c4b87 BH |
832 | default "13" if PPC64 && !PPC_64K_PAGES |
833 | range 9 64 if PPC32 && PPC_16K_PAGES | |
834 | default "9" if PPC32 && PPC_16K_PAGES | |
835 | range 7 64 if PPC32 && PPC_64K_PAGES | |
836 | default "7" if PPC32 && PPC_64K_PAGES | |
837 | range 5 64 if PPC32 && PPC_256K_PAGES | |
838 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 839 | range 11 64 |
53bcddb9 SR |
840 | default "11" |
841 | help | |
842 | The kernel memory allocator divides physically contiguous memory | |
843 | blocks into "zones", where each zone is a power of two number of | |
844 | pages. This option selects the largest power of two that the kernel | |
845 | keeps in the memory allocator. If you need to allocate very large | |
846 | blocks of physically contiguous memory, then you may need to | |
847 | increase this value. | |
848 | ||
849 | This config option is actually maximum order plus one. For example, | |
850 | a value of 11 means that the largest free memory block is 2^10 pages. | |
851 | ||
852 | The page size is not necessarily 4KB. For example, on 64-bit | |
853 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
854 | this in mind when choosing a value for this option. | |
855 | ||
fa28237c | 856 | config PPC_SUBPAGE_PROT |
63396ada NP |
857 | bool "Support setting protections for 4k subpages (subpage_prot syscall)" |
858 | default n | |
4e003747 | 859 | depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
fa28237c | 860 | help |
63396ada | 861 | This option adds support for system call to allow user programs |
fa28237c PM |
862 | to set access permissions (read/write, readonly, or no access) |
863 | on the 4k subpages of each 64k page. | |
864 | ||
63396ada NP |
865 | If unsure, say N here. |
866 | ||
9b725a90 SA |
867 | config PPC_PROT_SAO_LPAR |
868 | bool "Support PROT_SAO mappings in LPARs" | |
869 | depends on PPC_BOOK3S_64 | |
870 | help | |
871 | This option adds support for PROT_SAO mappings from userspace | |
872 | inside LPARs on supported CPUs. | |
873 | ||
874 | This may cause issues when performing guest migration from | |
875 | a CPU that supports SAO to one that does not. | |
876 | ||
877 | If unsure, say N here. | |
878 | ||
e83d0169 IM |
879 | config PPC_COPRO_BASE |
880 | bool | |
e83d0169 | 881 | |
14cf11af PM |
882 | config SCHED_SMT |
883 | bool "SMT (Hyperthreading) scheduler support" | |
884 | depends on PPC64 && SMP | |
14cf11af PM |
885 | help |
886 | SMT scheduler support improves the CPU scheduler's decision making | |
887 | when dealing with POWER5 cpus at a cost of slightly increased | |
888 | overhead in some places. If unsure say N here. | |
889 | ||
b92a66a6 MN |
890 | config PPC_DENORMALISATION |
891 | bool "PowerPC denormalisation exception handling" | |
892 | depends on PPC_BOOK3S_64 | |
4e90a2a7 | 893 | default "y" if PPC_POWERNV |
4f44e8ae | 894 | help |
b92a66a6 MN |
895 | Add support for handling denormalisation of single precision |
896 | values. Useful for bare metal only. If unsure say Y here. | |
897 | ||
14cf11af | 898 | config CMDLINE |
f134a7ce | 899 | string "Initial kernel command string" |
cbe46bd4 | 900 | default "" |
14cf11af PM |
901 | help |
902 | On some platforms, there is currently no way for the boot loader to | |
903 | pass arguments to the kernel. For these platforms, you can supply | |
904 | some command-line options at build time by entering them here. In | |
905 | most cases you will need to specify the root device here. | |
906 | ||
d79fbb3a CP |
907 | choice |
908 | prompt "Kernel command line type" if CMDLINE != "" | |
909 | default CMDLINE_FROM_BOOTLOADER | |
910 | ||
911 | config CMDLINE_FROM_BOOTLOADER | |
912 | bool "Use bootloader kernel arguments if available" | |
913 | help | |
914 | Uses the command-line options passed by the boot loader. If | |
915 | the boot loader doesn't provide any, the default kernel command | |
916 | string provided in CMDLINE will be used. | |
917 | ||
918 | config CMDLINE_EXTEND | |
919 | bool "Extend bootloader kernel arguments" | |
920 | help | |
921 | The command-line arguments provided by the boot loader will be | |
922 | appended to the default kernel command string. | |
923 | ||
eb3b80f6 SS |
924 | config CMDLINE_FORCE |
925 | bool "Always use the default kernel command string" | |
eb3b80f6 SS |
926 | help |
927 | Always use the default kernel command string, even if the boot | |
928 | loader passes other arguments to the kernel. | |
929 | This is useful if you cannot or don't want to change the | |
930 | command-line options your boot loader passes to the kernel. | |
931 | ||
d79fbb3a CP |
932 | endchoice |
933 | ||
c356aa45 GL |
934 | config EXTRA_TARGETS |
935 | string "Additional default image types" | |
936 | help | |
937 | List additional targets to be built by the bootwrapper here (separated | |
938 | by spaces). This is useful for targets that depend of device tree | |
939 | files in the .dts directory. | |
940 | ||
941 | Targets in this list will be build as part of the default build | |
942 | target, or when the user does a 'make zImage' or a | |
943 | 'make zImage.initrd'. | |
944 | ||
945 | If unsure, leave blank | |
946 | ||
b28f5081 JB |
947 | config ARCH_WANTS_FREEZER_CONTROL |
948 | def_bool y | |
949 | depends on ADB_PMU | |
950 | ||
8636a1f9 | 951 | source "kernel/power/Kconfig" |
14cf11af | 952 | |
92e3da3c RP |
953 | config PPC_MEM_KEYS |
954 | prompt "PowerPC Memory Protection Keys" | |
955 | def_bool y | |
956 | depends on PPC_BOOK3S_64 | |
957 | select ARCH_USES_HIGH_VMA_FLAGS | |
958 | select ARCH_HAS_PKEYS | |
959 | help | |
960 | Memory Protection Keys provides a mechanism for enforcing | |
961 | page-based protections, but without requiring modification of the | |
962 | page tables when an application changes protection domains. | |
963 | ||
1eecbcdc | 964 | For details, see Documentation/core-api/protection-keys.rst |
92e3da3c RP |
965 | |
966 | If unsure, say y. | |
967 | ||
1a8916ee NJ |
968 | config PPC_SECURE_BOOT |
969 | prompt "Enable secure boot support" | |
970 | bool | |
5c5e46da | 971 | depends on PPC_POWERNV || PPC_PSERIES |
4238fad3 | 972 | depends on IMA_ARCH_POLICY |
9e2b4be3 | 973 | imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
1a8916ee NJ |
974 | help |
975 | Systems with firmware secure boot enabled need to define security | |
976 | policies to extend secure boot to the OS. This config allows a user | |
977 | to enable OS secure boot on systems that have firmware support for | |
978 | it. If in doubt say N. | |
979 | ||
bd5d9c74 NJ |
980 | config PPC_SECVAR_SYSFS |
981 | bool "Enable sysfs interface for POWER secure variables" | |
982 | default y | |
983 | depends on PPC_SECURE_BOOT | |
984 | depends on SYSFS | |
985 | help | |
986 | POWER secure variables are managed and controlled by firmware. | |
987 | These variables are exposed to userspace via sysfs to enable | |
988 | read/write operations on these variables. Say Y if you have | |
989 | secure boot enabled and want to expose variables to userspace. | |
990 | ||
bd59380c AD |
991 | config PPC_RTAS_FILTER |
992 | bool "Enable filtering of RTAS syscalls" | |
993 | default y | |
994 | depends on PPC_RTAS | |
995 | help | |
996 | The RTAS syscall API has security issues that could be used to | |
997 | compromise system integrity. This option enforces restrictions on the | |
998 | RTAS calls and arguments passed by userspace programs to mitigate | |
999 | these issues. | |
1000 | ||
1001 | Say Y unless you know what you are doing and the filter is causing | |
1002 | problems for you. | |
1003 | ||
14cf11af PM |
1004 | endmenu |
1005 | ||
1006 | config ISA_DMA_API | |
1007 | bool | |
3d066d77 | 1008 | default PCI |
14cf11af PM |
1009 | |
1010 | menu "Bus options" | |
1011 | ||
1012 | config ISA | |
1013 | bool "Support for ISA-bus hardware" | |
933ee711 | 1014 | depends on PPC_CHRP |
f9bd170a | 1015 | select PPC_I8259 |
14cf11af PM |
1016 | help |
1017 | Find out whether you have ISA slots on your motherboard. ISA is the | |
1018 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
1019 | inside your box. If you have an Apple machine, say N here; if you | |
933ee711 PB |
1020 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
1021 | embedded board, consult your board documentation. | |
14cf11af PM |
1022 | |
1023 | config GENERIC_ISA_DMA | |
1024 | bool | |
1927445a | 1025 | depends on ISA_DMA_API |
14cf11af PM |
1026 | default y |
1027 | ||
25635c71 PM |
1028 | config PPC_INDIRECT_PCI |
1029 | bool | |
1030 | depends on PCI | |
63dafe57 | 1031 | default y if 40x || 44x |
25635c71 | 1032 | |
14cf11af PM |
1033 | config SBUS |
1034 | bool | |
1035 | ||
08264cbc KG |
1036 | config FSL_SOC |
1037 | bool | |
1038 | ||
55c44991 | 1039 | config FSL_PCI |
4f44e8ae | 1040 | bool |
11ddce15 | 1041 | select ARCH_HAS_DMA_SET_MASK |
55c44991 | 1042 | select PPC_INDIRECT_PCI |
d0839118 | 1043 | select PCI_QUIRKS |
55c44991 | 1044 | |
4ffd6952 AV |
1045 | config FSL_PMC |
1046 | bool | |
1047 | default y | |
1048 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
1049 | help | |
1050 | Freescale MPC85xx/MPC86xx power management controller support | |
1051 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
1052 | ||
d164f6d4 VG |
1053 | config PPC4xx_CPM |
1054 | bool | |
1055 | default y | |
1056 | depends on SUSPEND && (44x || 40x) | |
1057 | help | |
1058 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
1059 | It also enables support for two different idle states (idle-wait | |
1060 | and idle-doze). | |
1061 | ||
2a706919 SR |
1062 | config 4xx_SOC |
1063 | bool | |
1064 | ||
acaa7aa3 | 1065 | config FSL_LBC |
3ab8f2a2 | 1066 | bool "Freescale Local Bus support" |
acaa7aa3 | 1067 | help |
3ab8f2a2 RZ |
1068 | Enables reporting of errors from the Freescale local bus |
1069 | controller. Also contains some common code used by | |
1070 | drivers for specific local bus peripherals. | |
acaa7aa3 | 1071 | |
83ff9dcf AV |
1072 | config FSL_GTM |
1073 | bool | |
1074 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
1075 | help | |
1076 | Freescale General-purpose Timers support | |
1077 | ||
14cf11af PM |
1078 | config PCI_8260 |
1079 | bool | |
1080 | depends on PCI && 8260 | |
25635c71 | 1081 | select PPC_INDIRECT_PCI |
14cf11af PM |
1082 | default y |
1083 | ||
388b78ad AB |
1084 | config FSL_RIO |
1085 | bool "Freescale Embedded SRIO Controller support" | |
1753d50c | 1086 | depends on RAPIDIO = y && HAVE_RAPIDIO |
388b78ad | 1087 | default "n" |
4f44e8ae | 1088 | help |
388b78ad AB |
1089 | Include support for RapidIO controller on Freescale embedded |
1090 | processors (MPC8548, MPC8641, etc). | |
1091 | ||
14cf11af PM |
1092 | endmenu |
1093 | ||
0f890c8d SP |
1094 | config NONSTATIC_KERNEL |
1095 | bool | |
0f890c8d | 1096 | |
14cf11af PM |
1097 | menu "Advanced setup" |
1098 | depends on PPC32 | |
1099 | ||
1100 | config ADVANCED_OPTIONS | |
1101 | bool "Prompt for advanced kernel configuration options" | |
1102 | help | |
1103 | This option will enable prompting for a variety of advanced kernel | |
1104 | configuration options. These options can cause the kernel to not | |
1105 | work if they are set incorrectly, but can be used to optimize certain | |
1106 | aspects of kernel memory management. | |
1107 | ||
1108 | Unless you know what you are doing, say N here. | |
1109 | ||
1110 | comment "Default settings for advanced configuration options are used" | |
1111 | depends on !ADVANCED_OPTIONS | |
1112 | ||
14cf11af PM |
1113 | config LOWMEM_SIZE_BOOL |
1114 | bool "Set maximum low memory" | |
1115 | depends on ADVANCED_OPTIONS | |
1116 | help | |
1117 | This option allows you to set the maximum amount of memory which | |
1118 | will be used as "low memory", that is, memory which the kernel can | |
1119 | access directly, without having to set up a kernel virtual mapping. | |
1120 | This can be useful in optimizing the layout of kernel virtual | |
1121 | memory. | |
1122 | ||
1123 | Say N here unless you know what you are doing. | |
1124 | ||
1125 | config LOWMEM_SIZE | |
1126 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
1127 | default "0x30000000" | |
1128 | ||
96051465 TP |
1129 | config LOWMEM_CAM_NUM_BOOL |
1130 | bool "Set number of CAMs to use to map low memory" | |
1131 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
1132 | help | |
1133 | This option allows you to set the maximum number of CAM slots that | |
1134 | will be used to map low memory. There are a limited number of slots | |
1135 | available and even more limited number that will fit in the L1 MMU. | |
1136 | However, using more entries will allow mapping more low memory. This | |
1137 | can be useful in optimizing the layout of kernel virtual memory. | |
1138 | ||
1139 | Say N here unless you know what you are doing. | |
1140 | ||
1141 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 1142 | depends on FSL_BOOKE |
96051465 TP |
1143 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
1144 | default 3 | |
1145 | ||
0f890c8d | 1146 | config DYNAMIC_MEMSTART |
642e56ff KC |
1147 | bool "Enable page aligned dynamic load address for kernel" |
1148 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) | |
0f890c8d SP |
1149 | select NONSTATIC_KERNEL |
1150 | help | |
1151 | This option enables the kernel to be loaded at any page aligned | |
4f44e8ae | 1152 | physical address. The kernel creates a mapping from KERNELBASE to |
0f890c8d SP |
1153 | the address where the kernel is loaded. The page size here implies |
1154 | the TLB page size of the mapping for kernel on the particular platform. | |
1155 | Please refer to the init code for finding the TLB page size. | |
1156 | ||
1157 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
1158 | kernel image, where the only restriction is the page aligned kernel | |
4f44e8ae | 1159 | load address. When this option is enabled, the compile time physical |
0f890c8d SP |
1160 | address CONFIG_PHYSICAL_START is ignored. |
1161 | ||
9c5f7d39 SP |
1162 | This option is overridden by CONFIG_RELOCATABLE |
1163 | ||
37dd2bad KG |
1164 | config PAGE_OFFSET_BOOL |
1165 | bool "Set custom page offset address" | |
1166 | depends on ADVANCED_OPTIONS | |
1167 | help | |
1168 | This option allows you to set the kernel virtual address at which | |
1169 | the kernel will map low memory. This can be useful in optimizing | |
1170 | the virtual memory layout of the system. | |
1171 | ||
1172 | Say N here unless you know what you are doing. | |
1173 | ||
1174 | config PAGE_OFFSET | |
1175 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
1176 | default "0xc0000000" | |
1177 | ||
14cf11af PM |
1178 | config KERNEL_START_BOOL |
1179 | bool "Set custom kernel base address" | |
1180 | depends on ADVANCED_OPTIONS | |
1181 | help | |
1182 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
1183 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
1184 | however there are times (like kdump) that one might not want them | |
1185 | to be the same. | |
14cf11af PM |
1186 | |
1187 | Say N here unless you know what you are doing. | |
1188 | ||
1189 | config KERNEL_START | |
1190 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 1191 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
0f890c8d | 1192 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
14cf11af PM |
1193 | default "0xc0000000" |
1194 | ||
37dd2bad KG |
1195 | config PHYSICAL_START_BOOL |
1196 | bool "Set physical address where the kernel is loaded" | |
1197 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
1198 | help | |
1199 | This gives the physical address where the kernel is loaded. | |
1200 | ||
1201 | Say N here unless you know what you are doing. | |
1202 | ||
1203 | config PHYSICAL_START | |
1204 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
26598f28 | 1205 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
37dd2bad KG |
1206 | default "0x00000000" |
1207 | ||
1208 | config PHYSICAL_ALIGN | |
1209 | hex | |
c8f3570b | 1210 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
1211 | help |
1212 | This value puts the alignment restrictions on physical address | |
1213 | where kernel is loaded and run from. Kernel is compiled for an | |
1214 | address which meets above alignment restriction. | |
1215 | ||
14cf11af PM |
1216 | config TASK_SIZE_BOOL |
1217 | bool "Set custom user task size" | |
1218 | depends on ADVANCED_OPTIONS | |
1219 | help | |
1220 | This option allows you to set the amount of virtual address space | |
1221 | allocated to user tasks. This can be useful in optimizing the | |
1222 | virtual memory layout of the system. | |
1223 | ||
1224 | Say N here unless you know what you are doing. | |
1225 | ||
1226 | config TASK_SIZE | |
1227 | hex "Size of user task space" if TASK_SIZE_BOOL | |
933ee711 | 1228 | default "0x80000000" if PPC_8xx |
6ca05532 | 1229 | default "0xb0000000" if PPC_BOOK3S_32 && STRICT_KERNEL_RWX |
4d9e5510 | 1230 | default "0xc0000000" |
14cf11af PM |
1231 | endmenu |
1232 | ||
cabb5587 | 1233 | if PPC64 |
bdbc29c1 | 1234 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
37dd2bad KG |
1235 | config PAGE_OFFSET |
1236 | hex | |
1237 | default "0xc000000000000000" | |
cabb5587 SR |
1238 | config KERNEL_START |
1239 | hex | |
eeb2d218 | 1240 | default "0xc000000000000000" |
37dd2bad KG |
1241 | config PHYSICAL_START |
1242 | hex | |
37dd2bad | 1243 | default "0x00000000" |
cabb5587 SR |
1244 | endif |
1245 | ||
a4da0d50 ME |
1246 | config ARCH_RANDOM |
1247 | def_bool n | |
1248 | ||
1088a209 SM |
1249 | config PPC_LIB_RHEAP |
1250 | bool | |
1251 | ||
bbf45ba5 | 1252 | source "arch/powerpc/kvm/Kconfig" |
85baa095 ME |
1253 | |
1254 | source "kernel/livepatch/Kconfig" |