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" | |
7b3b3de3 | 69 | range 32 1048576 |
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 | |
f8a4b277 | 90 | selected via the generic lockup detector menu which is why we |
75eb767e NP |
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 LOCKDEP_SUPPORT |
98 | bool | |
99 | default y | |
100 | ||
95c354fe NP |
101 | config GENERIC_LOCKBREAK |
102 | bool | |
103 | default y | |
fdc5569e | 104 | depends on SMP && PREEMPTION |
95c354fe | 105 | |
e779b2f9 AM |
106 | config GENERIC_HWEIGHT |
107 | bool | |
108 | default y | |
109 | ||
14cf11af PM |
110 | config PPC |
111 | bool | |
112 | default y | |
a7d2475a ME |
113 | # |
114 | # Please keep this list sorted alphabetically. | |
115 | # | |
942fa985 | 116 | select ARCH_32BIT_OFF_T if PPC32 |
91024b3c AK |
117 | select ARCH_ENABLE_MEMORY_HOTPLUG |
118 | select ARCH_ENABLE_MEMORY_HOTREMOVE | |
c6b05f4e | 119 | select ARCH_HAS_COPY_MC if PPC64 |
6bf752da | 120 | select ARCH_HAS_DEBUG_VIRTUAL |
937c49d1 | 121 | select ARCH_HAS_DEBUG_VM_PGTABLE |
e0847283 | 122 | select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX |
a7d2475a | 123 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
c6b05f4e | 124 | select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES |
a7d2475a | 125 | select ARCH_HAS_ELF_RANDOMIZE |
6974f0c4 | 126 | select ARCH_HAS_FORTIFY_SOURCE |
a7d2475a | 127 | select ARCH_HAS_GCOV_PROFILE_ALL |
cbd34da7 | 128 | select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
c6b05f4e CL |
129 | select ARCH_HAS_KCOV |
130 | select ARCH_HAS_MEMBARRIER_CALLBACKS | |
131 | select ARCH_HAS_MEMBARRIER_SYNC_CORE | |
9ffc1d19 | 132 | select ARCH_HAS_MEMREMAP_COMPAT_ALIGN |
420af155 | 133 | select ARCH_HAS_MMIOWB if PPC64 |
c6b05f4e | 134 | select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
ea8c64ac | 135 | select ARCH_HAS_PHYS_TO_DMA |
461cef2a | 136 | select ARCH_HAS_PMEM_API |
17596731 | 137 | select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 |
3010a5ea | 138 | select ARCH_HAS_PTE_SPECIAL |
b4645ffc | 139 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
1f9ad21c | 140 | select ARCH_HAS_SET_MEMORY |
68b44f94 | 141 | select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION |
49e3d8ea | 142 | select ARCH_HAS_STRICT_KERNEL_RWX if FSL_BOOKE && !HIBERNATION && !RANDOMIZE_BASE |
c35717c7 | 143 | select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32 |
a7d2475a | 144 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
461cef2a | 145 | select ARCH_HAS_UACCESS_FLUSHCACHE |
a7d2475a ME |
146 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
147 | select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
350e88ba | 148 | select ARCH_KEEP_MEMBLOCK |
b7e7c37b | 149 | select ARCH_MIGHT_HAVE_PC_PARPORT |
c74e6d3d | 150 | select ARCH_MIGHT_HAVE_PC_SERIO |
4ec591e5 | 151 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
fdacae8a | 152 | select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT |
a1cdef04 | 153 | select ARCH_STACKWALK |
a7d2475a | 154 | select ARCH_SUPPORTS_ATOMIC_RMW |
68b44f94 | 155 | select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x |
a7d2475a ME |
156 | select ARCH_USE_BUILTIN_BSWAP |
157 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
dce44566 | 158 | select ARCH_USE_MEMTEST |
aa65ff6b NP |
159 | select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS |
160 | select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS | |
a7d2475a | 161 | select ARCH_WANT_IPC_PARSE_VERSION |
66acd460 | 162 | select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
59612b24 | 163 | select ARCH_WANT_LD_ORPHAN_WARN |
77e58496 | 164 | select ARCH_WEAK_RELEASE_ACQUIRE |
d812c0e1 | 165 | select BINFMT_ELF |
10916706 | 166 | select BUILDTIME_TABLE_SORT |
a7d2475a | 167 | select CLONE_BACKWARDS |
2eafc474 | 168 | select CPUMASK_OFFSTACK if NR_CPUS >= 8192 |
a7d2475a | 169 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
f1565c24 | 170 | select DMA_OPS_BYPASS if PPC64 |
c6b05f4e | 171 | select DMA_OPS if PPC64 |
0c0c5230 | 172 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
a7d2475a ME |
173 | select EDAC_ATOMIC_SCRUB |
174 | select EDAC_SUPPORT | |
175 | select GENERIC_ATOMIC64 if PPC32 | |
a7d2475a ME |
176 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
177 | select GENERIC_CMOS_UPDATE | |
178 | select GENERIC_CPU_AUTOPROBE | |
179ab1cb | 179 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
265c3491 | 180 | select GENERIC_EARLY_IOREMAP |
74205b3f | 181 | select GENERIC_GETTIMEOFDAY |
a7d2475a ME |
182 | select GENERIC_IRQ_SHOW |
183 | select GENERIC_IRQ_SHOW_LEVEL | |
eb01d42a | 184 | select GENERIC_PCI_IOMAP if PCI |
e0847283 | 185 | select GENERIC_PTDUMP |
a7d2475a | 186 | select GENERIC_SMP_IDLE_THREAD |
d4cfb113 | 187 | select GENERIC_TIME_VSYSCALL |
74205b3f | 188 | select GENERIC_VDSO_TIME_NS |
a7d2475a | 189 | select HAVE_ARCH_AUDITSYSCALL |
8abddd96 | 190 | select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP |
a6a8f7c4 | 191 | select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx |
a7d2475a | 192 | select HAVE_ARCH_JUMP_LABEL |
b0b3b2c7 | 193 | select HAVE_ARCH_JUMP_LABEL_RELATIVE |
888468ce CL |
194 | select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 |
195 | select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14 | |
68b44f94 | 196 | select HAVE_ARCH_KFENCE if PPC_BOOK3S_32 || PPC_8xx || 40x |
c6b05f4e | 197 | select HAVE_ARCH_KGDB |
9fea59bd ME |
198 | select HAVE_ARCH_MMAP_RND_BITS |
199 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
20e07af7 | 200 | select HAVE_ARCH_NVRAM_OPS |
a7d2475a ME |
201 | select HAVE_ARCH_SECCOMP_FILTER |
202 | select HAVE_ARCH_TRACEHOOK | |
2ff2b7ec | 203 | select HAVE_ASM_MODVERSIONS |
a7d2475a | 204 | select HAVE_CONTEXT_TRACKING if PPC64 |
c6b05f4e | 205 | select HAVE_C_RECORDMCOUNT |
a7d2475a ME |
206 | select HAVE_DEBUG_KMEMLEAK |
207 | select HAVE_DEBUG_STACKOVERFLOW | |
2b79d696 | 208 | select HAVE_DYNAMIC_FTRACE |
a7d2475a | 209 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
51c66ad8 | 210 | select HAVE_EBPF_JIT |
a7d2475a | 211 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) |
67a929e0 | 212 | select HAVE_FAST_GUP |
a7d2475a | 213 | select HAVE_FTRACE_MCOUNT_RECORD |
7cd01b08 | 214 | select HAVE_FUNCTION_ERROR_INJECTION |
60ce8f72 | 215 | select HAVE_FUNCTION_GRAPH_TRACER |
a7d2475a | 216 | select HAVE_FUNCTION_TRACER |
8034c2fb | 217 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
ab037dd8 | 218 | select HAVE_GENERIC_VDSO |
c6b05f4e CL |
219 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP |
220 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH | |
a7d2475a | 221 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
a1f242ff | 222 | select HAVE_IOREMAP_PROT |
a7d2475a | 223 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
c6b05f4e | 224 | select HAVE_IRQ_TIME_ACCOUNTING |
a7d2475a | 225 | select HAVE_KERNEL_GZIP |
1cc9a21b | 226 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
264bffad | 227 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
423bfc69 | 228 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
3f550096 | 229 | select HAVE_KPROBES |
ead514d5 | 230 | select HAVE_KPROBES_ON_FTRACE |
9edddaa2 | 231 | select HAVE_KRETPROBES |
4c1d9bb0 | 232 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
a7d2475a | 233 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
a7d2475a | 234 | select HAVE_MOD_ARCH_SPECIFIC |
2104180a | 235 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
eacf4c02 | 236 | select HAVE_OPTPROBES |
cdd6c482 | 237 | select HAVE_PERF_EVENTS |
a7d2475a | 238 | select HAVE_PERF_EVENTS_NMI if PPC64 |
ed4a4ef8 | 239 | select HAVE_PERF_REGS |
17ed7c38 | 240 | select HAVE_PERF_USER_STACK_DUMP |
359e4284 | 241 | select HAVE_REGS_AND_STACK_ACCESS_API |
accdd093 | 242 | select HAVE_RELIABLE_STACKTRACE |
c6b05f4e | 243 | select HAVE_RSEQ |
cd1a41ce | 244 | select HAVE_SOFTIRQ_ON_OWN_STACK |
c6b05f4e CL |
245 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) |
246 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) | |
5c810ced | 247 | select HAVE_STATIC_CALL if PPC32 |
a7d2475a ME |
248 | select HAVE_SYSCALL_TRACEPOINTS |
249 | select HAVE_VIRT_CPU_ACCOUNTING | |
f96271ce | 250 | select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE |
a4ce5a48 | 251 | select IOMMU_HELPER if PPC64 |
cc79ca69 | 252 | select IRQ_DOMAIN |
e8d2c473 | 253 | select IRQ_FORCED_THREADING |
c6b05f4e CL |
254 | select MMU_GATHER_PAGE_SIZE |
255 | select MMU_GATHER_RCU_TABLE_FREE | |
786d35d4 | 256 | select MODULES_USE_ELF_RELA |
06832fc0 | 257 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
86596f0a | 258 | select NEED_SG_DMA_LENGTH |
a7d2475a | 259 | select OF |
dabf6b36 | 260 | select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
a7d2475a | 261 | select OF_EARLY_FLATTREE |
a7d2475a ME |
262 | select OLD_SIGACTION if PPC32 |
263 | select OLD_SIGSUSPEND | |
2eac9c2d | 264 | select PCI_DOMAINS if PCI |
981aa1d3 | 265 | select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
20f1b79d | 266 | select PCI_SYSCALL if PCI |
a278e7ea | 267 | select PPC_DAWR if PPC64 |
6e8cef38 | 268 | select RTC_LIB |
a7d2475a | 269 | select SPARSE_IRQ |
c35717c7 | 270 | select STRICT_KERNEL_RWX if STRICT_MODULE_RWX |
a7d2475a | 271 | select SYSCTL_EXCEPTION_TRACE |
ed1cd6de | 272 | select THREAD_INFO_IN_TASK |
4aae683f | 273 | select TRACE_IRQFLAGS_SUPPORT |
a7d2475a ME |
274 | select VIRT_TO_BUS if !PPC64 |
275 | # | |
276 | # Please keep this list sorted alphabetically. | |
277 | # | |
14cf11af | 278 | |
179ab1cb | 279 | config PPC_BARRIER_NOSPEC |
4f44e8ae EWI |
280 | bool |
281 | default y | |
282 | depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E | |
179ab1cb | 283 | |
14cf11af PM |
284 | config EARLY_PRINTK |
285 | bool | |
51d3082f | 286 | default y |
14cf11af | 287 | |
b71d47c1 JB |
288 | config PANIC_TIMEOUT |
289 | int | |
290 | default 180 | |
291 | ||
14cf11af | 292 | config COMPAT |
6e944aed MS |
293 | bool "Enable support for 32bit binaries" |
294 | depends on PPC64 | |
6fcb5741 | 295 | depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 |
6e944aed | 296 | default y if !CPU_LITTLE_ENDIAN |
48b25c43 | 297 | select ARCH_WANT_OLD_COMPAT_IPC |
09a4d5d0 | 298 | select COMPAT_OLD_SIGACTION |
14cf11af PM |
299 | |
300 | config SYSVIPC_COMPAT | |
301 | bool | |
302 | depends on COMPAT && SYSVIPC | |
303 | default y | |
304 | ||
ae1e9130 | 305 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
306 | bool |
307 | default y | |
308 | ||
309 | config ARCH_MAY_HAVE_PC_FDC | |
310 | bool | |
3484a31f | 311 | default PCI |
14cf11af | 312 | |
08264cbc KG |
313 | config PPC_UDBG_16550 |
314 | bool | |
08264cbc | 315 | |
08264cbc KG |
316 | config GENERIC_TBSYNC |
317 | bool | |
318 | default y if PPC32 && SMP | |
08264cbc | 319 | |
b7472e17 ME |
320 | config AUDIT_ARCH |
321 | bool | |
322 | default y | |
323 | ||
73c9ceab JF |
324 | config GENERIC_BUG |
325 | bool | |
326 | default y | |
327 | depends on BUG | |
328 | ||
1baa1f70 JN |
329 | config GENERIC_BUG_RELATIVE_POINTERS |
330 | def_bool y | |
331 | depends on GENERIC_BUG | |
332 | ||
b3028878 | 333 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 334 | default y if PMAC_APM_EMU |
b3028878 JB |
335 | bool |
336 | ||
6c5b59b9 DG |
337 | config EPAPR_BOOT |
338 | bool | |
339 | help | |
340 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
6c5b59b9 | 341 | |
f4fc4a5b KG |
342 | config DEFAULT_UIMAGE |
343 | bool | |
344 | help | |
345 | Used to allow a board to specify it wants a uImage built by default | |
f4fc4a5b | 346 | |
801e4062 JB |
347 | config ARCH_HIBERNATION_POSSIBLE |
348 | bool | |
543b9fd3 JB |
349 | default y |
350 | ||
f4cb5700 JB |
351 | config ARCH_SUSPEND_POSSIBLE |
352 | def_bool y | |
4ffd6952 | 353 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
d0832a75 ZC |
354 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
355 | || 44x || 40x | |
f4cb5700 | 356 | |
9ca12ac0 NP |
357 | config ARCH_SUSPEND_NONZERO_CPU |
358 | def_bool y | |
359 | depends on PPC_POWERNV || PPC_PSERIES | |
360 | ||
4c75a6f4 BH |
361 | config PPC_DCR_NATIVE |
362 | bool | |
4c75a6f4 BH |
363 | |
364 | config PPC_DCR_MMIO | |
365 | bool | |
4c75a6f4 BH |
366 | |
367 | config PPC_DCR | |
368 | bool | |
369 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
370 | default y | |
371 | ||
4c9d2800 BH |
372 | config PPC_OF_PLATFORM_PCI |
373 | bool | |
373a6da1 | 374 | depends on PCI |
4c9d2800 | 375 | depends on PPC64 # not supported on 32 bits yet |
4c9d2800 | 376 | |
8b7b80b9 AM |
377 | config ARCH_SUPPORTS_UPROBES |
378 | def_bool y | |
379 | ||
172ae2e7 DK |
380 | config PPC_ADV_DEBUG_REGS |
381 | bool | |
382 | depends on 40x || BOOKE | |
383 | default y | |
384 | ||
385 | config PPC_ADV_DEBUG_IACS | |
386 | int | |
387 | depends on PPC_ADV_DEBUG_REGS | |
388 | default 4 if 44x | |
389 | default 2 | |
390 | ||
391 | config PPC_ADV_DEBUG_DACS | |
392 | int | |
393 | depends on PPC_ADV_DEBUG_REGS | |
394 | default 2 | |
395 | ||
396 | config PPC_ADV_DEBUG_DVCS | |
397 | int | |
398 | depends on PPC_ADV_DEBUG_REGS | |
399 | default 2 if 44x | |
400 | default 0 | |
401 | ||
402 | config PPC_ADV_DEBUG_DAC_RANGE | |
403 | bool | |
404 | depends on PPC_ADV_DEBUG_REGS && 44x | |
405 | default y | |
406 | ||
a278e7ea MN |
407 | config PPC_DAWR |
408 | bool | |
409 | ||
06ef42a1 KS |
410 | config PGTABLE_LEVELS |
411 | int | |
412 | default 2 if !PPC64 | |
06ef42a1 KS |
413 | default 4 |
414 | ||
a2d2e1ec | 415 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 416 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 417 | |
14cf11af PM |
418 | menu "Kernel options" |
419 | ||
420 | config HIGHMEM | |
421 | bool "High memory support" | |
422 | depends on PPC32 | |
47da42b2 | 423 | select KMAP_LOCAL |
14cf11af | 424 | |
8636a1f9 | 425 | source "kernel/Kconfig.hz" |
14cf11af | 426 | |
14cf11af PM |
427 | config MATH_EMULATION |
428 | bool "Math emulation" | |
53d143fe | 429 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT |
b6254ced | 430 | select PPC_FPU_REGS |
4f44e8ae | 431 | help |
14cf11af PM |
432 | Some PowerPC chips designed for embedded applications do not have |
433 | a floating-point unit and therefore do not implement the | |
434 | floating-point instructions in the PowerPC instruction set. If you | |
435 | say Y here, the kernel will include code to emulate a floating-point | |
436 | unit, which will allow programs that use floating-point | |
437 | instructions to run. | |
438 | ||
4e63f8ed BH |
439 | This is also useful to emulate missing (optional) instructions |
440 | such as fsqrt on cores that do have an FPU but do not implement | |
441 | them (such as Freescale BookE). | |
442 | ||
e05c0e81 KH |
443 | choice |
444 | prompt "Math emulation options" | |
445 | default MATH_EMULATION_FULL | |
446 | depends on MATH_EMULATION | |
447 | ||
448 | config MATH_EMULATION_FULL | |
449 | bool "Emulate all the floating point instructions" | |
4f44e8ae | 450 | help |
e05c0e81 KH |
451 | Select this option will enable the kernel to support to emulate |
452 | all the floating point instructions. If your SoC doesn't have | |
453 | a FPU, you should select this. | |
454 | ||
455 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
456 | bool "Just emulate the FPU unimplemented instructions" | |
4f44e8ae | 457 | help |
e05c0e81 KH |
458 | Select this if you know there does have a hardware FPU on your |
459 | SoC, but some floating point instructions are not implemented by that. | |
460 | ||
461 | endchoice | |
462 | ||
3d72bbc4 | 463 | config PPC_TRANSACTIONAL_MEM |
4f44e8ae EWI |
464 | bool "Transactional Memory support for POWERPC" |
465 | depends on PPC_BOOK3S_64 | |
466 | depends on SMP | |
467 | select ALTIVEC | |
468 | select VSX | |
469 | help | |
470 | Support user-mode Transactional Memory on POWERPC. | |
3d72bbc4 | 471 | |
013a53f2 AK |
472 | config PPC_UV |
473 | bool "Ultravisor support" | |
474 | depends on KVM_BOOK3S_HV_POSSIBLE | |
a2db55dd | 475 | depends on DEVICE_PRIVATE |
013a53f2 AK |
476 | default n |
477 | help | |
478 | This option paravirtualizes the kernel to run in POWER platforms that | |
479 | supports the Protected Execution Facility (PEF). On such platforms, | |
480 | the ultravisor firmware runs at a privilege level above the | |
481 | hypervisor. | |
482 | ||
483 | If unsure, say "N". | |
484 | ||
951eedeb NP |
485 | config LD_HEAD_STUB_CATCH |
486 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT | |
487 | depends on PPC64 | |
951eedeb NP |
488 | help |
489 | Very large kernels can cause linker branch stubs to be generated by | |
490 | code in head_64.S, which moves the head text sections out of their | |
491 | specified location. This option can work around the problem. | |
492 | ||
493 | If unsure, say "N". | |
494 | ||
8c50b72a | 495 | config MPROFILE_KERNEL |
57b3ed94 | 496 | depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER |
abba7597 | 497 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
8c50b72a | 498 | |
14cf11af PM |
499 | config HOTPLUG_CPU |
500 | bool "Support for enabling/disabling CPUs" | |
40b31360 | 501 | depends on SMP && (PPC_PSERIES || \ |
76be4414 | 502 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
4f44e8ae | 503 | help |
14cf11af PM |
504 | Say Y here to be able to disable and re-enable individual |
505 | CPUs at runtime on SMP machines. | |
506 | ||
507 | Say N if you are unsure. | |
508 | ||
aa65ff6b | 509 | config PPC_QUEUED_SPINLOCKS |
c9f34013 | 510 | bool "Queued spinlocks" if EXPERT |
aa65ff6b | 511 | depends on SMP |
c9f34013 | 512 | default PPC_BOOK3S_64 |
aa65ff6b NP |
513 | help |
514 | Say Y here to use queued spinlocks which give better scalability and | |
515 | fairness on large SMP and NUMA systems without harming single threaded | |
516 | performance. | |
517 | ||
12633e80 NF |
518 | config ARCH_CPU_PROBE_RELEASE |
519 | def_bool y | |
520 | depends on HOTPLUG_CPU | |
521 | ||
f2296a3d MS |
522 | config PPC64_SUPPORTS_MEMORY_FAILURE |
523 | bool "Add support for memory hwpoison" | |
524 | depends on PPC_BOOK3S_64 | |
525 | default "y" if PPC_POWERNV | |
526 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
527 | ||
14cf11af | 528 | config KEXEC |
642e56ff | 529 | bool "kexec system call" |
96eea642 | 530 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
2965faa5 | 531 | select KEXEC_CORE |
14cf11af PM |
532 | help |
533 | kexec is a system call that implements the ability to shutdown your | |
534 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 535 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
536 | you can start any kernel with it, not just Linux. |
537 | ||
1f1332f7 | 538 | The name comes from the similarity to the exec system call. |
14cf11af PM |
539 | |
540 | It is an ongoing process to be certain the hardware in a machine | |
541 | is properly shutdown, so do not be surprised if this code does not | |
bf220695 GU |
542 | initially work for you. As of this writing the exact hardware |
543 | interface is strongly in flux, so no good recommendation can be | |
544 | made. | |
14cf11af | 545 | |
80f60e50 TJB |
546 | config KEXEC_FILE |
547 | bool "kexec file based system call" | |
548 | select KEXEC_CORE | |
39652741 | 549 | select HAVE_IMA_KEXEC if IMA |
80f60e50 | 550 | select BUILD_BIN2C |
175fca3b | 551 | select KEXEC_ELF |
80f60e50 TJB |
552 | depends on PPC64 |
553 | depends on CRYPTO=y | |
554 | depends on CRYPTO_SHA256=y | |
555 | help | |
556 | This is a new version of the kexec system call. This call is | |
557 | file based and takes in file descriptors as system call arguments | |
558 | for kernel and initramfs as opposed to a list of segments as is the | |
559 | case for the older kexec call. | |
560 | ||
b799a09f AT |
561 | config ARCH_HAS_KEXEC_PURGATORY |
562 | def_bool KEXEC_FILE | |
563 | ||
4c91bd6e KH |
564 | config RELOCATABLE |
565 | bool "Build a relocatable kernel" | |
084a275e | 566 | depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
4c91bd6e | 567 | select NONSTATIC_KERNEL |
71810db2 | 568 | select MODULE_REL_CRCS if MODVERSIONS |
4c91bd6e KH |
569 | help |
570 | This builds a kernel image that is capable of running at the | |
571 | location the kernel is loaded at. For ppc32, there is no any | |
572 | alignment restrictions, and this feature is a superset of | |
573 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use | |
574 | 16k-aligned base address. The kernel is linked as a | |
575 | position-independent executable (PIE) and contains dynamic relocations | |
576 | which are processed early in the bootup process. | |
577 | ||
578 | One use is for the kexec on panic case where the recovery kernel | |
579 | must live at a different physical address than the primary | |
580 | kernel. | |
581 | ||
582 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
583 | it has been loaded at and the compile time physical addresses | |
584 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
585 | setting can still be useful to bootwrappers that need to know the | |
586 | load address of the kernel (eg. u-boot/mkimage). | |
587 | ||
2b0e86cc JY |
588 | config RANDOMIZE_BASE |
589 | bool "Randomize the address of the kernel image" | |
590 | depends on (FSL_BOOKE && FLATMEM && PPC32) | |
591 | depends on RELOCATABLE | |
592 | help | |
593 | Randomizes the virtual address at which the kernel image is | |
594 | loaded, as a security feature that deters exploit attempts | |
595 | relying on knowledge of the location of kernel internals. | |
596 | ||
597 | If unsure, say Y. | |
598 | ||
70839d20 NP |
599 | config RELOCATABLE_TEST |
600 | bool "Test relocatable kernel" | |
601 | depends on (PPC64 && RELOCATABLE) | |
70839d20 NP |
602 | help |
603 | This runs the relocatable kernel at the address it was initially | |
604 | loaded at, which tends to be non-zero and therefore test the | |
605 | relocation code. | |
606 | ||
e8625d46 | 607 | config CRASH_DUMP |
22bd0177 | 608 | bool "Build a dump capture kernel" |
be34fff0 | 609 | depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
084a275e | 610 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
e8625d46 | 611 | help |
22bd0177 | 612 | Build a kernel suitable for use as a dump capture kernel. |
54622f10 MK |
613 | The same kernel binary can be used as production kernel and dump |
614 | capture kernel. | |
e8625d46 | 615 | |
eb39c880 MS |
616 | config FA_DUMP |
617 | bool "Firmware-assisted dump" | |
41df5928 | 618 | depends on PPC64 && (PPC_RTAS || PPC_POWERNV) |
22bd0177 HB |
619 | select CRASH_CORE |
620 | select CRASH_DUMP | |
242f271c | 621 | help |
eb39c880 MS |
622 | A robust mechanism to get reliable kernel crash dump with |
623 | assistance from firmware. This approach does not use kexec, | |
22bd0177 | 624 | instead firmware assists in booting the capture kernel |
eb39c880 MS |
625 | while preserving memory contents. Firmware-assisted dump |
626 | is meant to be a kdump replacement offering robustness and | |
627 | speed not possible without system firmware assistance. | |
242f271c | 628 | |
41df5928 HB |
629 | If unsure, say "y". Only special kernels like petitboot may |
630 | need to say "N" here. | |
242f271c | 631 | |
bec53196 HB |
632 | config PRESERVE_FA_DUMP |
633 | bool "Preserve Firmware-assisted dump" | |
634 | depends on PPC64 && PPC_POWERNV && !FA_DUMP | |
635 | help | |
636 | On a kernel with FA_DUMP disabled, this option helps to preserve | |
637 | crash data from a previously crash'ed kernel. Useful when the next | |
638 | memory preserving kernel boot would process this crash data. | |
639 | Petitboot kernel is the typical usecase for this option. | |
640 | ||
6f713d18 HB |
641 | config OPAL_CORE |
642 | bool "Export OPAL memory as /sys/firmware/opal/core" | |
643 | depends on PPC64 && PPC_POWERNV | |
644 | help | |
645 | This option uses the MPIPL support in firmware to provide an | |
646 | ELF core of OPAL memory after a crash. The ELF core is exported | |
647 | as /sys/firmware/opal/core file which is helpful in debugging | |
648 | OPAL crashes using GDB. | |
242f271c | 649 | |
14cf11af PM |
650 | config IRQ_ALL_CPUS |
651 | bool "Distribute interrupts on all CPUs by default" | |
6cf09b9d | 652 | depends on SMP |
14cf11af PM |
653 | help |
654 | This option gives the kernel permission to distribute IRQs across | |
655 | multiple CPUs. Saying N here will route all IRQs to the first | |
656 | CPU. Generally saying Y is safe, although some problems have been | |
657 | reported with SMP Power Macintoshes with this option enabled. | |
658 | ||
ffa27b6b | 659 | config NUMA |
bae80c27 | 660 | bool "NUMA Memory Allocation and Scheduler Support" |
25395cd2 | 661 | depends on PPC64 && SMP |
4c28b32b | 662 | default y if PPC_PSERIES || PPC_POWERNV |
bae80c27 ME |
663 | help |
664 | Enable NUMA (Non-Uniform Memory Access) support. | |
665 | ||
666 | The kernel will try to allocate memory used by a CPU on the | |
667 | local memory controller of the CPU and add some more | |
668 | NUMA awareness to the kernel. | |
ffa27b6b | 669 | |
c80d79d7 YG |
670 | config NODES_SHIFT |
671 | int | |
ea55bf29 | 672 | default "8" if PPC64 |
c80d79d7 | 673 | default "4" |
a9ee6cf5 | 674 | depends on NUMA |
c80d79d7 | 675 | |
8c272261 NA |
676 | config USE_PERCPU_NUMA_NODE_ID |
677 | def_bool y | |
678 | depends on NUMA | |
679 | ||
64bb80d8 NA |
680 | config HAVE_MEMORYLESS_NODES |
681 | def_bool y | |
682 | depends on NUMA | |
683 | ||
14cf11af PM |
684 | config ARCH_SELECT_MEMORY_MODEL |
685 | def_bool y | |
686 | depends on PPC64 | |
687 | ||
688 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
689 | def_bool y |
690 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 691 | |
45fb6cea | 692 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 693 | def_bool y |
9100b205 | 694 | depends on PPC64 |
d29eff7b | 695 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 696 | |
45fb6cea | 697 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 698 | def_bool y |
7b3912f4 | 699 | depends on PPC_BOOK3S_64 |
14cf11af | 700 | |
f6853eb5 ME |
701 | config ILLEGAL_POINTER_VALUE |
702 | hex | |
703 | # This is roughly half way between the top of user space and the bottom | |
704 | # of kernel space, which seems about as good as we can get. | |
705 | default 0x5deadbeef0000000 if PPC64 | |
706 | default 0 | |
707 | ||
7e9191da MK |
708 | config ARCH_MEMORY_PROBE |
709 | def_bool y | |
710 | depends on MEMORY_HOTPLUG | |
711 | ||
ca9153a3 IY |
712 | choice |
713 | prompt "Page size" | |
f22969a6 | 714 | default PPC_64K_PAGES if PPC_BOOK3S_64 |
ca9153a3 | 715 | default PPC_4K_PAGES |
3c726f8d | 716 | help |
ca9153a3 IY |
717 | Select the kernel logical page size. Increasing the page size |
718 | will reduce software overhead at each page boundary, allow | |
719 | hardware prefetch mechanisms to be more effective, and allow | |
720 | larger dma transfers increasing IO efficiency and reducing | |
721 | overhead. However the utilization of memory will increase. | |
722 | For example, each cached file will using a multiple of the | |
723 | page size to hold its contents and the difference between the | |
724 | end of file and the end of page is wasted. | |
725 | ||
726 | Some dedicated systems, such as software raid serving with | |
727 | accelerated calculations, have shown significant increases. | |
728 | ||
729 | If you configure a 64 bit kernel for 64k pages but the | |
730 | processor does not support them, then the kernel will simulate | |
731 | them with 4k pages, loading them on demand, but with the | |
732 | reduced software overhead and larger internal fragmentation. | |
733 | For the 32 bit kernel, a large page option will not be offered | |
734 | unless it is supported by the configured processor. | |
735 | ||
736 | If unsure, choose 4K_PAGES. | |
737 | ||
738 | config PPC_4K_PAGES | |
739 | bool "4k page size" | |
19f97c98 | 740 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 IY |
741 | |
742 | config PPC_16K_PAGES | |
55f8b5b8 | 743 | bool "16k page size" |
55c8fc3f | 744 | depends on 44x || PPC_8xx |
ca9153a3 IY |
745 | |
746 | config PPC_64K_PAGES | |
55f8b5b8 | 747 | bool "64k page size" |
bba43630 | 748 | depends on 44x || PPC_BOOK3S_64 |
19f97c98 | 749 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 | 750 | |
e1240122 | 751 | config PPC_256K_PAGES |
4eeef098 CL |
752 | bool "256k page size (Requires non-standard binutils settings)" |
753 | depends on 44x && !PPC_47x | |
e1240122 YT |
754 | help |
755 | Make the page size 256k. | |
756 | ||
4eeef098 CL |
757 | The kernel will only be able to run applications that have been |
758 | compiled with '-zmax-page-size' set to 256K (the default is 64K) using | |
759 | binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE | |
760 | definition from 0x10000 to 0x40000 in older versions. | |
e1240122 | 761 | |
ca9153a3 | 762 | endchoice |
3c726f8d | 763 | |
555f4fdb CL |
764 | config PPC_PAGE_SHIFT |
765 | int | |
766 | default 18 if PPC_256K_PAGES | |
767 | default 16 if PPC_64K_PAGES | |
768 | default 14 if PPC_16K_PAGES | |
769 | default 12 | |
770 | ||
47613407 HM |
771 | config THREAD_SHIFT |
772 | int "Thread shift" if EXPERT | |
773 | range 13 15 | |
774 | default "15" if PPC_256K_PAGES | |
775 | default "14" if PPC64 | |
edbadaf0 | 776 | default "14" if KASAN |
47613407 HM |
777 | default "13" |
778 | help | |
779 | Used to define the stack size. The default is almost always what you | |
780 | want. Only change this if you know what you are doing. | |
781 | ||
0f4a9041 | 782 | config DATA_SHIFT_BOOL |
da1adea0 | 783 | bool "Set custom data alignment" |
0f4a9041 | 784 | depends on ADVANCED_OPTIONS |
90cbac0e | 785 | depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE |
49e3d8ea CL |
786 | depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \ |
787 | FSL_BOOKE | |
0f4a9041 CL |
788 | help |
789 | This option allows you to set the kernel data alignment. When | |
790 | RAM is mapped by blocks, the alignment needs to fit the size and | |
791 | number of possible blocks. The default should be OK for most configs. | |
792 | ||
793 | Say N here unless you know what you are doing. | |
166d97d9 CL |
794 | |
795 | config DATA_SHIFT | |
0f4a9041 | 796 | int "Data shift" if DATA_SHIFT_BOOL |
166d97d9 | 797 | default 24 if STRICT_KERNEL_RWX && PPC64 |
90cbac0e CL |
798 | range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
799 | range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx | |
49e3d8ea | 800 | range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_FSL_BOOKE |
63b2bc61 | 801 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
90cbac0e | 802 | default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
8f54a6f7 | 803 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
90cbac0e CL |
804 | default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA |
805 | default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx | |
49e3d8ea | 806 | default 24 if STRICT_KERNEL_RWX && FSL_BOOKE |
166d97d9 | 807 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
808 | help |
809 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. | |
810 | Smaller is the alignment, greater is the number of necessary DBATs. | |
166d97d9 | 811 | |
8f54a6f7 CL |
812 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
813 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
da1adea0 CL |
814 | in that case. If PIN_TLB is selected, it must be aligned to 8M as |
815 | 8M pages will be pinned. | |
8f54a6f7 | 816 | |
53bcddb9 SR |
817 | config FORCE_MAX_ZONEORDER |
818 | int "Maximum zone order" | |
a7ee5395 | 819 | range 8 9 if PPC64 && PPC_64K_PAGES |
066c4b87 | 820 | default "9" if PPC64 && PPC_64K_PAGES |
d5a1e42c | 821 | range 13 13 if PPC64 && !PPC_64K_PAGES |
066c4b87 BH |
822 | default "13" if PPC64 && !PPC_64K_PAGES |
823 | range 9 64 if PPC32 && PPC_16K_PAGES | |
824 | default "9" if PPC32 && PPC_16K_PAGES | |
825 | range 7 64 if PPC32 && PPC_64K_PAGES | |
826 | default "7" if PPC32 && PPC_64K_PAGES | |
827 | range 5 64 if PPC32 && PPC_256K_PAGES | |
828 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 829 | range 11 64 |
53bcddb9 SR |
830 | default "11" |
831 | help | |
832 | The kernel memory allocator divides physically contiguous memory | |
833 | blocks into "zones", where each zone is a power of two number of | |
834 | pages. This option selects the largest power of two that the kernel | |
835 | keeps in the memory allocator. If you need to allocate very large | |
836 | blocks of physically contiguous memory, then you may need to | |
837 | increase this value. | |
838 | ||
839 | This config option is actually maximum order plus one. For example, | |
840 | a value of 11 means that the largest free memory block is 2^10 pages. | |
841 | ||
842 | The page size is not necessarily 4KB. For example, on 64-bit | |
843 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
844 | this in mind when choosing a value for this option. | |
845 | ||
fa28237c | 846 | config PPC_SUBPAGE_PROT |
63396ada NP |
847 | bool "Support setting protections for 4k subpages (subpage_prot syscall)" |
848 | default n | |
4e003747 | 849 | depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
fa28237c | 850 | help |
63396ada | 851 | This option adds support for system call to allow user programs |
fa28237c PM |
852 | to set access permissions (read/write, readonly, or no access) |
853 | on the 4k subpages of each 64k page. | |
854 | ||
63396ada NP |
855 | If unsure, say N here. |
856 | ||
9b725a90 SA |
857 | config PPC_PROT_SAO_LPAR |
858 | bool "Support PROT_SAO mappings in LPARs" | |
859 | depends on PPC_BOOK3S_64 | |
860 | help | |
861 | This option adds support for PROT_SAO mappings from userspace | |
862 | inside LPARs on supported CPUs. | |
863 | ||
864 | This may cause issues when performing guest migration from | |
865 | a CPU that supports SAO to one that does not. | |
866 | ||
867 | If unsure, say N here. | |
868 | ||
e83d0169 IM |
869 | config PPC_COPRO_BASE |
870 | bool | |
e83d0169 | 871 | |
14cf11af PM |
872 | config SCHED_SMT |
873 | bool "SMT (Hyperthreading) scheduler support" | |
874 | depends on PPC64 && SMP | |
14cf11af PM |
875 | help |
876 | SMT scheduler support improves the CPU scheduler's decision making | |
877 | when dealing with POWER5 cpus at a cost of slightly increased | |
878 | overhead in some places. If unsure say N here. | |
879 | ||
b92a66a6 MN |
880 | config PPC_DENORMALISATION |
881 | bool "PowerPC denormalisation exception handling" | |
882 | depends on PPC_BOOK3S_64 | |
4e90a2a7 | 883 | default "y" if PPC_POWERNV |
4f44e8ae | 884 | help |
b92a66a6 MN |
885 | Add support for handling denormalisation of single precision |
886 | values. Useful for bare metal only. If unsure say Y here. | |
887 | ||
14cf11af | 888 | config CMDLINE |
f134a7ce | 889 | string "Initial kernel command string" |
cbe46bd4 | 890 | default "" |
14cf11af PM |
891 | help |
892 | On some platforms, there is currently no way for the boot loader to | |
893 | pass arguments to the kernel. For these platforms, you can supply | |
894 | some command-line options at build time by entering them here. In | |
895 | most cases you will need to specify the root device here. | |
896 | ||
d79fbb3a CP |
897 | choice |
898 | prompt "Kernel command line type" if CMDLINE != "" | |
899 | default CMDLINE_FROM_BOOTLOADER | |
900 | ||
901 | config CMDLINE_FROM_BOOTLOADER | |
902 | bool "Use bootloader kernel arguments if available" | |
903 | help | |
904 | Uses the command-line options passed by the boot loader. If | |
905 | the boot loader doesn't provide any, the default kernel command | |
906 | string provided in CMDLINE will be used. | |
907 | ||
908 | config CMDLINE_EXTEND | |
909 | bool "Extend bootloader kernel arguments" | |
910 | help | |
911 | The command-line arguments provided by the boot loader will be | |
912 | appended to the default kernel command string. | |
913 | ||
eb3b80f6 SS |
914 | config CMDLINE_FORCE |
915 | bool "Always use the default kernel command string" | |
eb3b80f6 SS |
916 | help |
917 | Always use the default kernel command string, even if the boot | |
918 | loader passes other arguments to the kernel. | |
919 | This is useful if you cannot or don't want to change the | |
920 | command-line options your boot loader passes to the kernel. | |
921 | ||
d79fbb3a CP |
922 | endchoice |
923 | ||
c356aa45 GL |
924 | config EXTRA_TARGETS |
925 | string "Additional default image types" | |
926 | help | |
927 | List additional targets to be built by the bootwrapper here (separated | |
928 | by spaces). This is useful for targets that depend of device tree | |
929 | files in the .dts directory. | |
930 | ||
931 | Targets in this list will be build as part of the default build | |
932 | target, or when the user does a 'make zImage' or a | |
933 | 'make zImage.initrd'. | |
934 | ||
935 | If unsure, leave blank | |
936 | ||
b28f5081 JB |
937 | config ARCH_WANTS_FREEZER_CONTROL |
938 | def_bool y | |
939 | depends on ADB_PMU | |
940 | ||
8636a1f9 | 941 | source "kernel/power/Kconfig" |
14cf11af | 942 | |
92e3da3c RP |
943 | config PPC_MEM_KEYS |
944 | prompt "PowerPC Memory Protection Keys" | |
945 | def_bool y | |
946 | depends on PPC_BOOK3S_64 | |
947 | select ARCH_USES_HIGH_VMA_FLAGS | |
948 | select ARCH_HAS_PKEYS | |
949 | help | |
950 | Memory Protection Keys provides a mechanism for enforcing | |
951 | page-based protections, but without requiring modification of the | |
952 | page tables when an application changes protection domains. | |
953 | ||
1eecbcdc | 954 | For details, see Documentation/core-api/protection-keys.rst |
92e3da3c RP |
955 | |
956 | If unsure, say y. | |
957 | ||
1a8916ee NJ |
958 | config PPC_SECURE_BOOT |
959 | prompt "Enable secure boot support" | |
960 | bool | |
5c5e46da | 961 | depends on PPC_POWERNV || PPC_PSERIES |
4238fad3 | 962 | depends on IMA_ARCH_POLICY |
9e2b4be3 | 963 | imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
1a8916ee NJ |
964 | help |
965 | Systems with firmware secure boot enabled need to define security | |
966 | policies to extend secure boot to the OS. This config allows a user | |
967 | to enable OS secure boot on systems that have firmware support for | |
968 | it. If in doubt say N. | |
969 | ||
bd5d9c74 NJ |
970 | config PPC_SECVAR_SYSFS |
971 | bool "Enable sysfs interface for POWER secure variables" | |
972 | default y | |
973 | depends on PPC_SECURE_BOOT | |
974 | depends on SYSFS | |
975 | help | |
976 | POWER secure variables are managed and controlled by firmware. | |
977 | These variables are exposed to userspace via sysfs to enable | |
978 | read/write operations on these variables. Say Y if you have | |
979 | secure boot enabled and want to expose variables to userspace. | |
980 | ||
bd59380c AD |
981 | config PPC_RTAS_FILTER |
982 | bool "Enable filtering of RTAS syscalls" | |
983 | default y | |
984 | depends on PPC_RTAS | |
985 | help | |
986 | The RTAS syscall API has security issues that could be used to | |
987 | compromise system integrity. This option enforces restrictions on the | |
988 | RTAS calls and arguments passed by userspace programs to mitigate | |
989 | these issues. | |
990 | ||
991 | Say Y unless you know what you are doing and the filter is causing | |
992 | problems for you. | |
993 | ||
14cf11af PM |
994 | endmenu |
995 | ||
996 | config ISA_DMA_API | |
997 | bool | |
3d066d77 | 998 | default PCI |
14cf11af PM |
999 | |
1000 | menu "Bus options" | |
1001 | ||
1002 | config ISA | |
1003 | bool "Support for ISA-bus hardware" | |
933ee711 | 1004 | depends on PPC_CHRP |
f9bd170a | 1005 | select PPC_I8259 |
14cf11af PM |
1006 | help |
1007 | Find out whether you have ISA slots on your motherboard. ISA is the | |
1008 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
1009 | inside your box. If you have an Apple machine, say N here; if you | |
933ee711 PB |
1010 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
1011 | embedded board, consult your board documentation. | |
14cf11af PM |
1012 | |
1013 | config GENERIC_ISA_DMA | |
1014 | bool | |
1927445a | 1015 | depends on ISA_DMA_API |
14cf11af PM |
1016 | default y |
1017 | ||
25635c71 PM |
1018 | config PPC_INDIRECT_PCI |
1019 | bool | |
1020 | depends on PCI | |
63dafe57 | 1021 | default y if 40x || 44x |
25635c71 | 1022 | |
14cf11af PM |
1023 | config SBUS |
1024 | bool | |
1025 | ||
08264cbc KG |
1026 | config FSL_SOC |
1027 | bool | |
1028 | ||
55c44991 | 1029 | config FSL_PCI |
4f44e8ae | 1030 | bool |
11ddce15 | 1031 | select ARCH_HAS_DMA_SET_MASK |
55c44991 | 1032 | select PPC_INDIRECT_PCI |
d0839118 | 1033 | select PCI_QUIRKS |
55c44991 | 1034 | |
4ffd6952 AV |
1035 | config FSL_PMC |
1036 | bool | |
1037 | default y | |
1038 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
1039 | help | |
1040 | Freescale MPC85xx/MPC86xx power management controller support | |
1041 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
1042 | ||
d164f6d4 VG |
1043 | config PPC4xx_CPM |
1044 | bool | |
1045 | default y | |
1046 | depends on SUSPEND && (44x || 40x) | |
1047 | help | |
1048 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
1049 | It also enables support for two different idle states (idle-wait | |
1050 | and idle-doze). | |
1051 | ||
2a706919 SR |
1052 | config 4xx_SOC |
1053 | bool | |
1054 | ||
acaa7aa3 | 1055 | config FSL_LBC |
3ab8f2a2 | 1056 | bool "Freescale Local Bus support" |
acaa7aa3 | 1057 | help |
3ab8f2a2 RZ |
1058 | Enables reporting of errors from the Freescale local bus |
1059 | controller. Also contains some common code used by | |
1060 | drivers for specific local bus peripherals. | |
acaa7aa3 | 1061 | |
83ff9dcf AV |
1062 | config FSL_GTM |
1063 | bool | |
1064 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
1065 | help | |
1066 | Freescale General-purpose Timers support | |
1067 | ||
14cf11af PM |
1068 | config PCI_8260 |
1069 | bool | |
1070 | depends on PCI && 8260 | |
25635c71 | 1071 | select PPC_INDIRECT_PCI |
14cf11af PM |
1072 | default y |
1073 | ||
388b78ad AB |
1074 | config FSL_RIO |
1075 | bool "Freescale Embedded SRIO Controller support" | |
1753d50c | 1076 | depends on RAPIDIO = y && HAVE_RAPIDIO |
388b78ad | 1077 | default "n" |
4f44e8ae | 1078 | help |
388b78ad AB |
1079 | Include support for RapidIO controller on Freescale embedded |
1080 | processors (MPC8548, MPC8641, etc). | |
1081 | ||
14cf11af PM |
1082 | endmenu |
1083 | ||
0f890c8d SP |
1084 | config NONSTATIC_KERNEL |
1085 | bool | |
0f890c8d | 1086 | |
14cf11af PM |
1087 | menu "Advanced setup" |
1088 | depends on PPC32 | |
1089 | ||
1090 | config ADVANCED_OPTIONS | |
1091 | bool "Prompt for advanced kernel configuration options" | |
1092 | help | |
1093 | This option will enable prompting for a variety of advanced kernel | |
1094 | configuration options. These options can cause the kernel to not | |
1095 | work if they are set incorrectly, but can be used to optimize certain | |
1096 | aspects of kernel memory management. | |
1097 | ||
1098 | Unless you know what you are doing, say N here. | |
1099 | ||
1100 | comment "Default settings for advanced configuration options are used" | |
1101 | depends on !ADVANCED_OPTIONS | |
1102 | ||
14cf11af PM |
1103 | config LOWMEM_SIZE_BOOL |
1104 | bool "Set maximum low memory" | |
1105 | depends on ADVANCED_OPTIONS | |
1106 | help | |
1107 | This option allows you to set the maximum amount of memory which | |
1108 | will be used as "low memory", that is, memory which the kernel can | |
1109 | access directly, without having to set up a kernel virtual mapping. | |
1110 | This can be useful in optimizing the layout of kernel virtual | |
1111 | memory. | |
1112 | ||
1113 | Say N here unless you know what you are doing. | |
1114 | ||
1115 | config LOWMEM_SIZE | |
1116 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
1117 | default "0x30000000" | |
1118 | ||
96051465 TP |
1119 | config LOWMEM_CAM_NUM_BOOL |
1120 | bool "Set number of CAMs to use to map low memory" | |
1121 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
1122 | help | |
1123 | This option allows you to set the maximum number of CAM slots that | |
1124 | will be used to map low memory. There are a limited number of slots | |
1125 | available and even more limited number that will fit in the L1 MMU. | |
1126 | However, using more entries will allow mapping more low memory. This | |
1127 | can be useful in optimizing the layout of kernel virtual memory. | |
1128 | ||
1129 | Say N here unless you know what you are doing. | |
1130 | ||
1131 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 1132 | depends on FSL_BOOKE |
96051465 | 1133 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
49e3d8ea CL |
1134 | default 3 if !STRICT_KERNEL_RWX |
1135 | default 9 if DATA_SHIFT >= 24 | |
1136 | default 12 if DATA_SHIFT >= 22 | |
1137 | default 15 | |
96051465 | 1138 | |
0f890c8d | 1139 | config DYNAMIC_MEMSTART |
642e56ff KC |
1140 | bool "Enable page aligned dynamic load address for kernel" |
1141 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) | |
0f890c8d SP |
1142 | select NONSTATIC_KERNEL |
1143 | help | |
1144 | This option enables the kernel to be loaded at any page aligned | |
4f44e8ae | 1145 | physical address. The kernel creates a mapping from KERNELBASE to |
0f890c8d SP |
1146 | the address where the kernel is loaded. The page size here implies |
1147 | the TLB page size of the mapping for kernel on the particular platform. | |
1148 | Please refer to the init code for finding the TLB page size. | |
1149 | ||
1150 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
1151 | kernel image, where the only restriction is the page aligned kernel | |
4f44e8ae | 1152 | load address. When this option is enabled, the compile time physical |
0f890c8d SP |
1153 | address CONFIG_PHYSICAL_START is ignored. |
1154 | ||
9c5f7d39 SP |
1155 | This option is overridden by CONFIG_RELOCATABLE |
1156 | ||
37dd2bad KG |
1157 | config PAGE_OFFSET_BOOL |
1158 | bool "Set custom page offset address" | |
1159 | depends on ADVANCED_OPTIONS | |
1160 | help | |
1161 | This option allows you to set the kernel virtual address at which | |
1162 | the kernel will map low memory. This can be useful in optimizing | |
1163 | the virtual memory layout of the system. | |
1164 | ||
1165 | Say N here unless you know what you are doing. | |
1166 | ||
1167 | config PAGE_OFFSET | |
1168 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
1169 | default "0xc0000000" | |
1170 | ||
14cf11af PM |
1171 | config KERNEL_START_BOOL |
1172 | bool "Set custom kernel base address" | |
1173 | depends on ADVANCED_OPTIONS | |
1174 | help | |
1175 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
1176 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
1177 | however there are times (like kdump) that one might not want them | |
1178 | to be the same. | |
14cf11af PM |
1179 | |
1180 | Say N here unless you know what you are doing. | |
1181 | ||
1182 | config KERNEL_START | |
1183 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 1184 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
0f890c8d | 1185 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
14cf11af PM |
1186 | default "0xc0000000" |
1187 | ||
37dd2bad KG |
1188 | config PHYSICAL_START_BOOL |
1189 | bool "Set physical address where the kernel is loaded" | |
1190 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
1191 | help | |
1192 | This gives the physical address where the kernel is loaded. | |
1193 | ||
1194 | Say N here unless you know what you are doing. | |
1195 | ||
1196 | config PHYSICAL_START | |
1197 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
26598f28 | 1198 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
37dd2bad KG |
1199 | default "0x00000000" |
1200 | ||
1201 | config PHYSICAL_ALIGN | |
1202 | hex | |
c8f3570b | 1203 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
1204 | help |
1205 | This value puts the alignment restrictions on physical address | |
1206 | where kernel is loaded and run from. Kernel is compiled for an | |
1207 | address which meets above alignment restriction. | |
1208 | ||
14cf11af PM |
1209 | config TASK_SIZE_BOOL |
1210 | bool "Set custom user task size" | |
1211 | depends on ADVANCED_OPTIONS | |
1212 | help | |
1213 | This option allows you to set the amount of virtual address space | |
1214 | allocated to user tasks. This can be useful in optimizing the | |
1215 | virtual memory layout of the system. | |
1216 | ||
1217 | Say N here unless you know what you are doing. | |
1218 | ||
1219 | config TASK_SIZE | |
1220 | hex "Size of user task space" if TASK_SIZE_BOOL | |
933ee711 | 1221 | default "0x80000000" if PPC_8xx |
80edc68e | 1222 | default "0xb0000000" if PPC_BOOK3S_32 |
4d9e5510 | 1223 | default "0xc0000000" |
14cf11af PM |
1224 | endmenu |
1225 | ||
cabb5587 | 1226 | if PPC64 |
bdbc29c1 | 1227 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
37dd2bad KG |
1228 | config PAGE_OFFSET |
1229 | hex | |
1230 | default "0xc000000000000000" | |
cabb5587 SR |
1231 | config KERNEL_START |
1232 | hex | |
eeb2d218 | 1233 | default "0xc000000000000000" |
37dd2bad KG |
1234 | config PHYSICAL_START |
1235 | hex | |
37dd2bad | 1236 | default "0x00000000" |
cabb5587 SR |
1237 | endif |
1238 | ||
a4da0d50 ME |
1239 | config ARCH_RANDOM |
1240 | def_bool n | |
1241 | ||
1088a209 SM |
1242 | config PPC_LIB_RHEAP |
1243 | bool | |
1244 | ||
bbf45ba5 | 1245 | source "arch/powerpc/kvm/Kconfig" |
85baa095 ME |
1246 | |
1247 | source "kernel/livepatch/Kconfig" |