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 | ||
a4520b25 CL |
12 | config LIVEPATCH_64 |
13 | def_bool PPC64 | |
cea9d62b | 14 | depends on LIVEPATCH |
a4520b25 | 15 | |
14cf11af PM |
16 | config MMU |
17 | bool | |
18 | default y | |
19 | ||
9fea59bd ME |
20 | config ARCH_MMAP_RND_BITS_MAX |
21 | # On Book3S 64, the default virtual address space for 64-bit processes | |
22 | # is 2^47 (128TB). As a maximum, allow randomisation to consume up to | |
23 | # 32T of address space (2^45), which should ensure a reasonable gap | |
24 | # between bottom-up and top-down allocations for applications that | |
25 | # consume "normal" amounts of address space. Book3S 64 only supports 64K | |
26 | # and 4K page sizes. | |
27 | default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) | |
28 | default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) | |
29 | # | |
30 | # On all other 64-bit platforms (currently only Book3E), the virtual | |
31 | # address space is 2^46 (64TB). Allow randomisation to consume up to 16T | |
32 | # of address space (2^44). Only 4K page sizes are supported. | |
33 | default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) | |
34 | # | |
35 | # For 32-bit, use the compat values, as they're the same. | |
36 | default ARCH_MMAP_RND_COMPAT_BITS_MAX | |
37 | ||
38 | config ARCH_MMAP_RND_BITS_MIN | |
39 | # Allow randomisation to consume up to 1GB of address space (2^30). | |
40 | default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) | |
41 | default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) | |
42 | # | |
43 | # For 32-bit, use the compat values, as they're the same. | |
44 | default ARCH_MMAP_RND_COMPAT_BITS_MIN | |
45 | ||
46 | config ARCH_MMAP_RND_COMPAT_BITS_MAX | |
47 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
48 | # Allow randomisation to consume up to 512MB of address space (2^29). | |
49 | default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) | |
50 | default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) | |
4f44e8ae | 51 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
9fea59bd ME |
52 | default 17 # 17 = 29 (512MB) - 12 (4K) |
53 | ||
54 | config ARCH_MMAP_RND_COMPAT_BITS_MIN | |
55 | # Total virtual address space for 32-bit processes is 2^31 (2GB). | |
56 | # Allow randomisation to consume up to 8MB of address space (2^23). | |
57 | default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) | |
58 | default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) | |
59 | default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) | |
60 | default 11 # 11 = 23 (8MB) - 12 (4K) | |
61 | ||
551b81f2 ME |
62 | config NR_IRQS |
63 | int "Number of virtual interrupt numbers" | |
7b3b3de3 | 64 | range 32 1048576 |
551b81f2 ME |
65 | default "512" |
66 | help | |
67 | This defines the number of virtual interrupt numbers the kernel | |
68 | can manage. Virtual interrupt numbers are what you see in | |
69 | /proc/interrupts. If you configure your system to have too few, | |
70 | drivers will fail to load or worse - handle with care. | |
71 | ||
ddd703ca NP |
72 | config NMI_IPI |
73 | bool | |
2104180a | 74 | depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
ddd703ca NP |
75 | default y |
76 | ||
75eb767e NP |
77 | config PPC_WATCHDOG |
78 | bool | |
79 | depends on HARDLOCKUP_DETECTOR | |
80 | depends on HAVE_HARDLOCKUP_DETECTOR_ARCH | |
81 | default y | |
82 | help | |
83 | This is a placeholder when the powerpc hardlockup detector | |
84 | watchdog is selected (arch/powerpc/kernel/watchdog.c). It is | |
f8a4b277 | 85 | selected via the generic lockup detector menu which is why we |
75eb767e NP |
86 | have no standalone config option for it here. |
87 | ||
fd3e0bbc CH |
88 | config STACKTRACE_SUPPORT |
89 | bool | |
90 | default y | |
91 | ||
945feb17 BH |
92 | config LOCKDEP_SUPPORT |
93 | bool | |
94 | default y | |
95 | ||
95c354fe NP |
96 | config GENERIC_LOCKBREAK |
97 | bool | |
98 | default y | |
fdc5569e | 99 | depends on SMP && PREEMPTION |
95c354fe | 100 | |
e779b2f9 AM |
101 | config GENERIC_HWEIGHT |
102 | bool | |
103 | default y | |
104 | ||
14cf11af PM |
105 | config PPC |
106 | bool | |
107 | default y | |
a7d2475a ME |
108 | # |
109 | # Please keep this list sorted alphabetically. | |
110 | # | |
942fa985 | 111 | select ARCH_32BIT_OFF_T if PPC32 |
41b7a347 | 112 | select ARCH_DISABLE_KASAN_INLINE if PPC_RADIX_MMU |
91024b3c AK |
113 | select ARCH_ENABLE_MEMORY_HOTPLUG |
114 | select ARCH_ENABLE_MEMORY_HOTREMOVE | |
c6b05f4e | 115 | select ARCH_HAS_COPY_MC if PPC64 |
2792d84e | 116 | select ARCH_HAS_CURRENT_STACK_POINTER |
6bf752da | 117 | select ARCH_HAS_DEBUG_VIRTUAL |
937c49d1 | 118 | select ARCH_HAS_DEBUG_VM_PGTABLE |
e0847283 | 119 | select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX |
a7d2475a | 120 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
c6b05f4e | 121 | select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES |
6974f0c4 | 122 | select ARCH_HAS_FORTIFY_SOURCE |
a7d2475a | 123 | select ARCH_HAS_GCOV_PROFILE_ALL |
cbd34da7 | 124 | select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
c6b05f4e CL |
125 | select ARCH_HAS_KCOV |
126 | select ARCH_HAS_MEMBARRIER_CALLBACKS | |
127 | select ARCH_HAS_MEMBARRIER_SYNC_CORE | |
387e220a | 128 | select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU |
420af155 | 129 | select ARCH_HAS_MMIOWB if PPC64 |
c6b05f4e | 130 | select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
ea8c64ac | 131 | select ARCH_HAS_PHYS_TO_DMA |
461cef2a | 132 | select ARCH_HAS_PMEM_API |
17596731 | 133 | select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 |
3010a5ea | 134 | select ARCH_HAS_PTE_SPECIAL |
b4645ffc | 135 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
1f9ad21c | 136 | select ARCH_HAS_SET_MEMORY |
68b44f94 | 137 | select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION |
dfc3095c | 138 | select ARCH_HAS_STRICT_KERNEL_RWX if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE |
0670010f | 139 | select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
7e92e01b | 140 | select ARCH_HAS_SYSCALL_WRAPPER if !SPU_BASE && !COMPAT |
a7d2475a | 141 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
461cef2a | 142 | select ARCH_HAS_UACCESS_FLUSHCACHE |
a7d2475a ME |
143 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
144 | select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
350e88ba | 145 | select ARCH_KEEP_MEMBLOCK |
b7e7c37b | 146 | select ARCH_MIGHT_HAVE_PC_PARPORT |
c74e6d3d | 147 | select ARCH_MIGHT_HAVE_PC_SERIO |
4ec591e5 | 148 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
fdacae8a | 149 | select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT |
a1cdef04 | 150 | select ARCH_STACKWALK |
a7d2475a | 151 | select ARCH_SUPPORTS_ATOMIC_RMW |
68b44f94 | 152 | select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x |
a7d2475a ME |
153 | select ARCH_USE_BUILTIN_BSWAP |
154 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
dce44566 | 155 | select ARCH_USE_MEMTEST |
aa65ff6b NP |
156 | select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS |
157 | select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS | |
36e5f9ee | 158 | select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT |
a7d2475a | 159 | select ARCH_WANT_IPC_PARSE_VERSION |
66acd460 | 160 | select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
59612b24 | 161 | select ARCH_WANT_LD_ORPHAN_WARN |
eeaec780 | 162 | select ARCH_WANTS_MODULES_DATA_IN_VMALLOC if PPC_BOOK3S_32 || PPC_8xx |
41b7a347 | 163 | select ARCH_WANTS_NO_INSTR |
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 | 194 | select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 |
41b7a347 | 195 | select HAVE_ARCH_KASAN if PPC_RADIX_MMU |
c7b9ed7c | 196 | select HAVE_ARCH_KASAN if PPC_BOOK3E_64 |
41b7a347 | 197 | select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN |
a5edf981 | 198 | select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC |
f4a0318f | 199 | select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET |
c6b05f4e | 200 | select HAVE_ARCH_KGDB |
9fea59bd ME |
201 | select HAVE_ARCH_MMAP_RND_BITS |
202 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
20e07af7 | 203 | select HAVE_ARCH_NVRAM_OPS |
a7d2475a ME |
204 | select HAVE_ARCH_SECCOMP_FILTER |
205 | select HAVE_ARCH_TRACEHOOK | |
2ff2b7ec | 206 | select HAVE_ASM_MODVERSIONS |
24a9c541 | 207 | select HAVE_CONTEXT_TRACKING_USER if PPC64 |
c6b05f4e | 208 | select HAVE_C_RECORDMCOUNT |
a7d2475a ME |
209 | select HAVE_DEBUG_KMEMLEAK |
210 | select HAVE_DEBUG_STACKOVERFLOW | |
2b79d696 | 211 | select HAVE_DYNAMIC_FTRACE |
40b035ef | 212 | select HAVE_DYNAMIC_FTRACE_WITH_ARGS if MPROFILE_KERNEL || PPC32 |
7dfbfb87 | 213 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL || PPC32 |
51c66ad8 | 214 | select HAVE_EBPF_JIT |
ecf8f364 | 215 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
67a929e0 | 216 | select HAVE_FAST_GUP |
a7d2475a | 217 | select HAVE_FTRACE_MCOUNT_RECORD |
5b89492c | 218 | select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1 |
7cd01b08 | 219 | select HAVE_FUNCTION_ERROR_INJECTION |
60ce8f72 | 220 | select HAVE_FUNCTION_GRAPH_TRACER |
a7d2475a | 221 | select HAVE_FUNCTION_TRACER |
8034c2fb | 222 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
ab037dd8 | 223 | select HAVE_GENERIC_VDSO |
c6b05f4e CL |
224 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP |
225 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH | |
a7d2475a | 226 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
a1f242ff | 227 | select HAVE_IOREMAP_PROT |
c6b05f4e | 228 | select HAVE_IRQ_TIME_ACCOUNTING |
a7d2475a | 229 | select HAVE_KERNEL_GZIP |
1cc9a21b | 230 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
264bffad | 231 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
423bfc69 | 232 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
3f550096 | 233 | select HAVE_KPROBES |
ead514d5 | 234 | select HAVE_KPROBES_ON_FTRACE |
9edddaa2 | 235 | select HAVE_KRETPROBES |
4c1d9bb0 | 236 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
a4520b25 | 237 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
a7d2475a | 238 | select HAVE_MOD_ARCH_SPECIFIC |
2104180a | 239 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
eacf4c02 | 240 | select HAVE_OPTPROBES |
cdd6c482 | 241 | select HAVE_PERF_EVENTS |
a7d2475a | 242 | select HAVE_PERF_EVENTS_NMI if PPC64 |
ed4a4ef8 | 243 | select HAVE_PERF_REGS |
17ed7c38 | 244 | select HAVE_PERF_USER_STACK_DUMP |
359e4284 | 245 | select HAVE_REGS_AND_STACK_ACCESS_API |
accdd093 | 246 | select HAVE_RELIABLE_STACKTRACE |
c6b05f4e | 247 | select HAVE_RSEQ |
7ecd19cf | 248 | select HAVE_SETUP_PER_CPU_AREA if PPC64 |
cd1a41ce | 249 | select HAVE_SOFTIRQ_ON_OWN_STACK |
c6b05f4e CL |
250 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) |
251 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) | |
5c810ced | 252 | select HAVE_STATIC_CALL if PPC32 |
a7d2475a ME |
253 | select HAVE_SYSCALL_TRACEPOINTS |
254 | select HAVE_VIRT_CPU_ACCOUNTING | |
f96271ce | 255 | select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE |
a4ce5a48 | 256 | select IOMMU_HELPER if PPC64 |
cc79ca69 | 257 | select IRQ_DOMAIN |
e8d2c473 | 258 | select IRQ_FORCED_THREADING |
c7b9ed7c | 259 | select KASAN_VMALLOC if KASAN && MODULES |
c6b05f4e CL |
260 | select MMU_GATHER_PAGE_SIZE |
261 | select MMU_GATHER_RCU_TABLE_FREE | |
1e9fdf21 | 262 | select MMU_GATHER_MERGE_VMAS |
786d35d4 | 263 | select MODULES_USE_ELF_RELA |
06832fc0 | 264 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
7ecd19cf KW |
265 | select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64 |
266 | select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64 | |
86596f0a | 267 | select NEED_SG_DMA_LENGTH |
a7d2475a | 268 | select OF |
dabf6b36 | 269 | select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
a7d2475a | 270 | select OF_EARLY_FLATTREE |
a7d2475a ME |
271 | select OLD_SIGACTION if PPC32 |
272 | select OLD_SIGSUSPEND | |
2eac9c2d | 273 | select PCI_DOMAINS if PCI |
981aa1d3 | 274 | select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
20f1b79d | 275 | select PCI_SYSCALL if PCI |
a278e7ea | 276 | select PPC_DAWR if PPC64 |
6e8cef38 | 277 | select RTC_LIB |
a7d2475a | 278 | select SPARSE_IRQ |
c35717c7 | 279 | select STRICT_KERNEL_RWX if STRICT_MODULE_RWX |
a7d2475a | 280 | select SYSCTL_EXCEPTION_TRACE |
ed1cd6de | 281 | select THREAD_INFO_IN_TASK |
4aae683f | 282 | select TRACE_IRQFLAGS_SUPPORT |
a7d2475a ME |
283 | # |
284 | # Please keep this list sorted alphabetically. | |
285 | # | |
14cf11af | 286 | |
c653c591 ME |
287 | config PPC_LONG_DOUBLE_128 |
288 | depends on PPC64 | |
289 | def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1) | |
290 | ||
179ab1cb | 291 | config PPC_BARRIER_NOSPEC |
4f44e8ae EWI |
292 | bool |
293 | default y | |
3e731858 | 294 | depends on PPC_BOOK3S_64 || PPC_E500 |
179ab1cb | 295 | |
14cf11af PM |
296 | config EARLY_PRINTK |
297 | bool | |
51d3082f | 298 | default y |
14cf11af | 299 | |
b71d47c1 JB |
300 | config PANIC_TIMEOUT |
301 | int | |
302 | default 180 | |
303 | ||
14cf11af | 304 | config COMPAT |
6e944aed MS |
305 | bool "Enable support for 32bit binaries" |
306 | depends on PPC64 | |
6fcb5741 | 307 | depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 |
6e944aed | 308 | default y if !CPU_LITTLE_ENDIAN |
48b25c43 | 309 | select ARCH_WANT_OLD_COMPAT_IPC |
09a4d5d0 | 310 | select COMPAT_OLD_SIGACTION |
14cf11af | 311 | |
ae1e9130 | 312 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
313 | bool |
314 | default y | |
315 | ||
316 | config ARCH_MAY_HAVE_PC_FDC | |
317 | bool | |
3484a31f | 318 | default PCI |
14cf11af | 319 | |
08264cbc KG |
320 | config PPC_UDBG_16550 |
321 | bool | |
08264cbc | 322 | |
08264cbc KG |
323 | config GENERIC_TBSYNC |
324 | bool | |
325 | default y if PPC32 && SMP | |
08264cbc | 326 | |
b7472e17 ME |
327 | config AUDIT_ARCH |
328 | bool | |
329 | default y | |
330 | ||
73c9ceab JF |
331 | config GENERIC_BUG |
332 | bool | |
333 | default y | |
334 | depends on BUG | |
335 | ||
1baa1f70 JN |
336 | config GENERIC_BUG_RELATIVE_POINTERS |
337 | def_bool y | |
338 | depends on GENERIC_BUG | |
339 | ||
b3028878 | 340 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 341 | default y if PMAC_APM_EMU |
b3028878 JB |
342 | bool |
343 | ||
6c5b59b9 DG |
344 | config EPAPR_BOOT |
345 | bool | |
346 | help | |
347 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
6c5b59b9 | 348 | |
f4fc4a5b KG |
349 | config DEFAULT_UIMAGE |
350 | bool | |
351 | help | |
352 | Used to allow a board to specify it wants a uImage built by default | |
f4fc4a5b | 353 | |
801e4062 JB |
354 | config ARCH_HIBERNATION_POSSIBLE |
355 | bool | |
543b9fd3 JB |
356 | default y |
357 | ||
f4cb5700 JB |
358 | config ARCH_SUSPEND_POSSIBLE |
359 | def_bool y | |
4ffd6952 | 360 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
d0832a75 ZC |
361 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
362 | || 44x || 40x | |
f4cb5700 | 363 | |
9ca12ac0 NP |
364 | config ARCH_SUSPEND_NONZERO_CPU |
365 | def_bool y | |
366 | depends on PPC_POWERNV || PPC_PSERIES | |
367 | ||
ac790d09 AK |
368 | config ARCH_HAS_ADD_PAGES |
369 | def_bool y | |
370 | depends on ARCH_ENABLE_MEMORY_HOTPLUG | |
371 | ||
4c75a6f4 BH |
372 | config PPC_DCR_NATIVE |
373 | bool | |
4c75a6f4 BH |
374 | |
375 | config PPC_DCR_MMIO | |
376 | bool | |
4c75a6f4 BH |
377 | |
378 | config PPC_DCR | |
379 | bool | |
380 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
381 | default y | |
382 | ||
56635681 PR |
383 | config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT |
384 | depends on PPC32 | |
385 | depends on !PPC_PMAC && !PPC_CHRP | |
386 | bool "Assign PCI bus numbers from zero individually for each PCI domain" | |
387 | help | |
388 | By default on PPC32 were PCI bus numbers unique across all PCI domains. | |
389 | So system could have only 256 PCI buses independently of available | |
390 | PCI domains. When this option is enabled then PCI bus numbers are | |
391 | PCI domain dependent and each PCI controller on own domain can have | |
392 | 256 PCI buses, like it is on other Linux architectures. | |
393 | ||
4c9d2800 BH |
394 | config PPC_OF_PLATFORM_PCI |
395 | bool | |
373a6da1 | 396 | depends on PCI |
4c9d2800 | 397 | depends on PPC64 # not supported on 32 bits yet |
4c9d2800 | 398 | |
8b7b80b9 AM |
399 | config ARCH_SUPPORTS_UPROBES |
400 | def_bool y | |
401 | ||
172ae2e7 DK |
402 | config PPC_ADV_DEBUG_REGS |
403 | bool | |
404 | depends on 40x || BOOKE | |
405 | default y | |
406 | ||
407 | config PPC_ADV_DEBUG_IACS | |
408 | int | |
409 | depends on PPC_ADV_DEBUG_REGS | |
410 | default 4 if 44x | |
411 | default 2 | |
412 | ||
413 | config PPC_ADV_DEBUG_DACS | |
414 | int | |
415 | depends on PPC_ADV_DEBUG_REGS | |
416 | default 2 | |
417 | ||
418 | config PPC_ADV_DEBUG_DVCS | |
419 | int | |
420 | depends on PPC_ADV_DEBUG_REGS | |
421 | default 2 if 44x | |
422 | default 0 | |
423 | ||
424 | config PPC_ADV_DEBUG_DAC_RANGE | |
425 | bool | |
426 | depends on PPC_ADV_DEBUG_REGS && 44x | |
427 | default y | |
428 | ||
a278e7ea MN |
429 | config PPC_DAWR |
430 | bool | |
431 | ||
06ef42a1 KS |
432 | config PGTABLE_LEVELS |
433 | int | |
434 | default 2 if !PPC64 | |
06ef42a1 KS |
435 | default 4 |
436 | ||
a2d2e1ec | 437 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 438 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 439 | |
14cf11af PM |
440 | menu "Kernel options" |
441 | ||
442 | config HIGHMEM | |
443 | bool "High memory support" | |
444 | depends on PPC32 | |
47da42b2 | 445 | select KMAP_LOCAL |
14cf11af | 446 | |
8636a1f9 | 447 | source "kernel/Kconfig.hz" |
14cf11af | 448 | |
14cf11af PM |
449 | config MATH_EMULATION |
450 | bool "Math emulation" | |
53d143fe | 451 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT |
b6254ced | 452 | select PPC_FPU_REGS |
4f44e8ae | 453 | help |
14cf11af PM |
454 | Some PowerPC chips designed for embedded applications do not have |
455 | a floating-point unit and therefore do not implement the | |
456 | floating-point instructions in the PowerPC instruction set. If you | |
457 | say Y here, the kernel will include code to emulate a floating-point | |
458 | unit, which will allow programs that use floating-point | |
459 | instructions to run. | |
460 | ||
4e63f8ed BH |
461 | This is also useful to emulate missing (optional) instructions |
462 | such as fsqrt on cores that do have an FPU but do not implement | |
463 | them (such as Freescale BookE). | |
464 | ||
e05c0e81 KH |
465 | choice |
466 | prompt "Math emulation options" | |
467 | default MATH_EMULATION_FULL | |
468 | depends on MATH_EMULATION | |
469 | ||
cea9d62b | 470 | config MATH_EMULATION_FULL |
e05c0e81 | 471 | bool "Emulate all the floating point instructions" |
4f44e8ae | 472 | help |
e05c0e81 KH |
473 | Select this option will enable the kernel to support to emulate |
474 | all the floating point instructions. If your SoC doesn't have | |
475 | a FPU, you should select this. | |
476 | ||
477 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
478 | bool "Just emulate the FPU unimplemented instructions" | |
4f44e8ae | 479 | help |
e05c0e81 KH |
480 | Select this if you know there does have a hardware FPU on your |
481 | SoC, but some floating point instructions are not implemented by that. | |
482 | ||
483 | endchoice | |
484 | ||
3d72bbc4 | 485 | config PPC_TRANSACTIONAL_MEM |
4f44e8ae EWI |
486 | bool "Transactional Memory support for POWERPC" |
487 | depends on PPC_BOOK3S_64 | |
488 | depends on SMP | |
489 | select ALTIVEC | |
490 | select VSX | |
491 | help | |
492 | Support user-mode Transactional Memory on POWERPC. | |
3d72bbc4 | 493 | |
013a53f2 AK |
494 | config PPC_UV |
495 | bool "Ultravisor support" | |
496 | depends on KVM_BOOK3S_HV_POSSIBLE | |
a2db55dd | 497 | depends on DEVICE_PRIVATE |
013a53f2 AK |
498 | default n |
499 | help | |
500 | This option paravirtualizes the kernel to run in POWER platforms that | |
501 | supports the Protected Execution Facility (PEF). On such platforms, | |
502 | the ultravisor firmware runs at a privilege level above the | |
503 | hypervisor. | |
504 | ||
505 | If unsure, say "N". | |
506 | ||
951eedeb NP |
507 | config LD_HEAD_STUB_CATCH |
508 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT | |
509 | depends on PPC64 | |
951eedeb NP |
510 | help |
511 | Very large kernels can cause linker branch stubs to be generated by | |
512 | code in head_64.S, which moves the head text sections out of their | |
513 | specified location. This option can work around the problem. | |
514 | ||
515 | If unsure, say "N". | |
516 | ||
8c50b72a | 517 | config MPROFILE_KERNEL |
57b3ed94 | 518 | depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER |
abba7597 | 519 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
8c50b72a | 520 | |
14cf11af PM |
521 | config HOTPLUG_CPU |
522 | bool "Support for enabling/disabling CPUs" | |
40b31360 | 523 | depends on SMP && (PPC_PSERIES || \ |
76be4414 | 524 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
4f44e8ae | 525 | help |
14cf11af PM |
526 | Say Y here to be able to disable and re-enable individual |
527 | CPUs at runtime on SMP machines. | |
528 | ||
529 | Say N if you are unsure. | |
530 | ||
aa65ff6b | 531 | config PPC_QUEUED_SPINLOCKS |
c9f34013 | 532 | bool "Queued spinlocks" if EXPERT |
aa65ff6b | 533 | depends on SMP |
c9f34013 | 534 | default PPC_BOOK3S_64 |
aa65ff6b NP |
535 | help |
536 | Say Y here to use queued spinlocks which give better scalability and | |
537 | fairness on large SMP and NUMA systems without harming single threaded | |
538 | performance. | |
539 | ||
12633e80 NF |
540 | config ARCH_CPU_PROBE_RELEASE |
541 | def_bool y | |
542 | depends on HOTPLUG_CPU | |
543 | ||
f2296a3d MS |
544 | config PPC64_SUPPORTS_MEMORY_FAILURE |
545 | bool "Add support for memory hwpoison" | |
546 | depends on PPC_BOOK3S_64 | |
547 | default "y" if PPC_POWERNV | |
548 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
549 | ||
14cf11af | 550 | config KEXEC |
642e56ff | 551 | bool "kexec system call" |
772fd56d | 552 | depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP) |
2965faa5 | 553 | select KEXEC_CORE |
14cf11af PM |
554 | help |
555 | kexec is a system call that implements the ability to shutdown your | |
556 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 557 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
558 | you can start any kernel with it, not just Linux. |
559 | ||
1f1332f7 | 560 | The name comes from the similarity to the exec system call. |
14cf11af PM |
561 | |
562 | It is an ongoing process to be certain the hardware in a machine | |
563 | is properly shutdown, so do not be surprised if this code does not | |
bf220695 GU |
564 | initially work for you. As of this writing the exact hardware |
565 | interface is strongly in flux, so no good recommendation can be | |
566 | made. | |
14cf11af | 567 | |
80f60e50 TJB |
568 | config KEXEC_FILE |
569 | bool "kexec file based system call" | |
570 | select KEXEC_CORE | |
39652741 | 571 | select HAVE_IMA_KEXEC if IMA |
175fca3b | 572 | select KEXEC_ELF |
80f60e50 TJB |
573 | depends on PPC64 |
574 | depends on CRYPTO=y | |
575 | depends on CRYPTO_SHA256=y | |
576 | help | |
577 | This is a new version of the kexec system call. This call is | |
578 | file based and takes in file descriptors as system call arguments | |
579 | for kernel and initramfs as opposed to a list of segments as is the | |
580 | case for the older kexec call. | |
581 | ||
b799a09f AT |
582 | config ARCH_HAS_KEXEC_PURGATORY |
583 | def_bool KEXEC_FILE | |
584 | ||
4c91bd6e KH |
585 | config RELOCATABLE |
586 | bool "Build a relocatable kernel" | |
dfc3095c | 587 | depends on PPC64 || (FLATMEM && (44x || PPC_85xx)) |
4c91bd6e KH |
588 | select NONSTATIC_KERNEL |
589 | help | |
590 | This builds a kernel image that is capable of running at the | |
591 | location the kernel is loaded at. For ppc32, there is no any | |
592 | alignment restrictions, and this feature is a superset of | |
593 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use | |
594 | 16k-aligned base address. The kernel is linked as a | |
595 | position-independent executable (PIE) and contains dynamic relocations | |
596 | which are processed early in the bootup process. | |
597 | ||
598 | One use is for the kexec on panic case where the recovery kernel | |
599 | must live at a different physical address than the primary | |
600 | kernel. | |
601 | ||
602 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
603 | it has been loaded at and the compile time physical addresses | |
604 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
605 | setting can still be useful to bootwrappers that need to know the | |
606 | load address of the kernel (eg. u-boot/mkimage). | |
607 | ||
2b0e86cc JY |
608 | config RANDOMIZE_BASE |
609 | bool "Randomize the address of the kernel image" | |
73d11498 | 610 | depends on PPC_85xx && FLATMEM |
2b0e86cc JY |
611 | depends on RELOCATABLE |
612 | help | |
613 | Randomizes the virtual address at which the kernel image is | |
614 | loaded, as a security feature that deters exploit attempts | |
615 | relying on knowledge of the location of kernel internals. | |
616 | ||
617 | If unsure, say Y. | |
618 | ||
70839d20 NP |
619 | config RELOCATABLE_TEST |
620 | bool "Test relocatable kernel" | |
621 | depends on (PPC64 && RELOCATABLE) | |
70839d20 NP |
622 | help |
623 | This runs the relocatable kernel at the address it was initially | |
624 | loaded at, which tends to be non-zero and therefore test the | |
625 | relocation code. | |
626 | ||
e8625d46 | 627 | config CRASH_DUMP |
22bd0177 | 628 | bool "Build a dump capture kernel" |
dfc3095c CL |
629 | depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP) |
630 | select RELOCATABLE if PPC64 || 44x || PPC_85xx | |
e8625d46 | 631 | help |
22bd0177 | 632 | Build a kernel suitable for use as a dump capture kernel. |
54622f10 MK |
633 | The same kernel binary can be used as production kernel and dump |
634 | capture kernel. | |
e8625d46 | 635 | |
eb39c880 MS |
636 | config FA_DUMP |
637 | bool "Firmware-assisted dump" | |
41df5928 | 638 | depends on PPC64 && (PPC_RTAS || PPC_POWERNV) |
22bd0177 HB |
639 | select CRASH_CORE |
640 | select CRASH_DUMP | |
242f271c | 641 | help |
eb39c880 MS |
642 | A robust mechanism to get reliable kernel crash dump with |
643 | assistance from firmware. This approach does not use kexec, | |
22bd0177 | 644 | instead firmware assists in booting the capture kernel |
eb39c880 MS |
645 | while preserving memory contents. Firmware-assisted dump |
646 | is meant to be a kdump replacement offering robustness and | |
647 | speed not possible without system firmware assistance. | |
242f271c | 648 | |
41df5928 HB |
649 | If unsure, say "y". Only special kernels like petitboot may |
650 | need to say "N" here. | |
242f271c | 651 | |
bec53196 HB |
652 | config PRESERVE_FA_DUMP |
653 | bool "Preserve Firmware-assisted dump" | |
654 | depends on PPC64 && PPC_POWERNV && !FA_DUMP | |
655 | help | |
656 | On a kernel with FA_DUMP disabled, this option helps to preserve | |
657 | crash data from a previously crash'ed kernel. Useful when the next | |
658 | memory preserving kernel boot would process this crash data. | |
659 | Petitboot kernel is the typical usecase for this option. | |
660 | ||
6f713d18 HB |
661 | config OPAL_CORE |
662 | bool "Export OPAL memory as /sys/firmware/opal/core" | |
663 | depends on PPC64 && PPC_POWERNV | |
664 | help | |
665 | This option uses the MPIPL support in firmware to provide an | |
666 | ELF core of OPAL memory after a crash. The ELF core is exported | |
667 | as /sys/firmware/opal/core file which is helpful in debugging | |
668 | OPAL crashes using GDB. | |
242f271c | 669 | |
14cf11af PM |
670 | config IRQ_ALL_CPUS |
671 | bool "Distribute interrupts on all CPUs by default" | |
6cf09b9d | 672 | depends on SMP |
14cf11af PM |
673 | help |
674 | This option gives the kernel permission to distribute IRQs across | |
675 | multiple CPUs. Saying N here will route all IRQs to the first | |
676 | CPU. Generally saying Y is safe, although some problems have been | |
677 | reported with SMP Power Macintoshes with this option enabled. | |
678 | ||
ffa27b6b | 679 | config NUMA |
bae80c27 | 680 | bool "NUMA Memory Allocation and Scheduler Support" |
25395cd2 | 681 | depends on PPC64 && SMP |
4c28b32b | 682 | default y if PPC_PSERIES || PPC_POWERNV |
7ecd19cf | 683 | select USE_PERCPU_NUMA_NODE_ID |
bae80c27 ME |
684 | help |
685 | Enable NUMA (Non-Uniform Memory Access) support. | |
686 | ||
687 | The kernel will try to allocate memory used by a CPU on the | |
688 | local memory controller of the CPU and add some more | |
689 | NUMA awareness to the kernel. | |
ffa27b6b | 690 | |
c80d79d7 YG |
691 | config NODES_SHIFT |
692 | int | |
ea55bf29 | 693 | default "8" if PPC64 |
c80d79d7 | 694 | default "4" |
a9ee6cf5 | 695 | depends on NUMA |
c80d79d7 | 696 | |
64bb80d8 NA |
697 | config HAVE_MEMORYLESS_NODES |
698 | def_bool y | |
699 | depends on NUMA | |
700 | ||
14cf11af PM |
701 | config ARCH_SELECT_MEMORY_MODEL |
702 | def_bool y | |
703 | depends on PPC64 | |
704 | ||
705 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
706 | def_bool y |
707 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 708 | |
45fb6cea | 709 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 710 | def_bool y |
9100b205 | 711 | depends on PPC64 |
d29eff7b | 712 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 713 | |
45fb6cea | 714 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 715 | def_bool y |
7b3912f4 | 716 | depends on PPC_BOOK3S_64 |
14cf11af | 717 | |
f6853eb5 ME |
718 | config ILLEGAL_POINTER_VALUE |
719 | hex | |
720 | # This is roughly half way between the top of user space and the bottom | |
721 | # of kernel space, which seems about as good as we can get. | |
722 | default 0x5deadbeef0000000 if PPC64 | |
723 | default 0 | |
724 | ||
7e9191da MK |
725 | config ARCH_MEMORY_PROBE |
726 | def_bool y | |
727 | depends on MEMORY_HOTPLUG | |
728 | ||
ca9153a3 IY |
729 | choice |
730 | prompt "Page size" | |
f22969a6 | 731 | default PPC_64K_PAGES if PPC_BOOK3S_64 |
ca9153a3 | 732 | default PPC_4K_PAGES |
3c726f8d | 733 | help |
ca9153a3 IY |
734 | Select the kernel logical page size. Increasing the page size |
735 | will reduce software overhead at each page boundary, allow | |
736 | hardware prefetch mechanisms to be more effective, and allow | |
737 | larger dma transfers increasing IO efficiency and reducing | |
738 | overhead. However the utilization of memory will increase. | |
739 | For example, each cached file will using a multiple of the | |
740 | page size to hold its contents and the difference between the | |
741 | end of file and the end of page is wasted. | |
742 | ||
743 | Some dedicated systems, such as software raid serving with | |
744 | accelerated calculations, have shown significant increases. | |
745 | ||
746 | If you configure a 64 bit kernel for 64k pages but the | |
747 | processor does not support them, then the kernel will simulate | |
748 | them with 4k pages, loading them on demand, but with the | |
749 | reduced software overhead and larger internal fragmentation. | |
750 | For the 32 bit kernel, a large page option will not be offered | |
751 | unless it is supported by the configured processor. | |
752 | ||
753 | If unsure, choose 4K_PAGES. | |
754 | ||
755 | config PPC_4K_PAGES | |
756 | bool "4k page size" | |
19f97c98 | 757 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 IY |
758 | |
759 | config PPC_16K_PAGES | |
55f8b5b8 | 760 | bool "16k page size" |
55c8fc3f | 761 | depends on 44x || PPC_8xx |
ca9153a3 IY |
762 | |
763 | config PPC_64K_PAGES | |
55f8b5b8 | 764 | bool "64k page size" |
bba43630 | 765 | depends on 44x || PPC_BOOK3S_64 |
19f97c98 | 766 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
ca9153a3 | 767 | |
e1240122 | 768 | config PPC_256K_PAGES |
4eeef098 CL |
769 | bool "256k page size (Requires non-standard binutils settings)" |
770 | depends on 44x && !PPC_47x | |
e1240122 YT |
771 | help |
772 | Make the page size 256k. | |
773 | ||
4eeef098 CL |
774 | The kernel will only be able to run applications that have been |
775 | compiled with '-zmax-page-size' set to 256K (the default is 64K) using | |
776 | binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE | |
777 | definition from 0x10000 to 0x40000 in older versions. | |
e1240122 | 778 | |
ca9153a3 | 779 | endchoice |
3c726f8d | 780 | |
d036dc79 ME |
781 | config PAGE_SIZE_4KB |
782 | def_bool y | |
783 | depends on PPC_4K_PAGES | |
784 | ||
785 | config PAGE_SIZE_16KB | |
786 | def_bool y | |
787 | depends on PPC_16K_PAGES | |
788 | ||
789 | config PAGE_SIZE_64KB | |
790 | def_bool y | |
791 | depends on PPC_64K_PAGES | |
792 | ||
793 | config PAGE_SIZE_256KB | |
794 | def_bool y | |
795 | depends on PPC_256K_PAGES | |
796 | ||
555f4fdb CL |
797 | config PPC_PAGE_SHIFT |
798 | int | |
799 | default 18 if PPC_256K_PAGES | |
800 | default 16 if PPC_64K_PAGES | |
801 | default 14 if PPC_16K_PAGES | |
802 | default 12 | |
803 | ||
47613407 HM |
804 | config THREAD_SHIFT |
805 | int "Thread shift" if EXPERT | |
806 | range 13 15 | |
807 | default "15" if PPC_256K_PAGES | |
808 | default "14" if PPC64 | |
809 | default "13" | |
810 | help | |
811 | Used to define the stack size. The default is almost always what you | |
812 | want. Only change this if you know what you are doing. | |
813 | ||
0f4a9041 | 814 | config DATA_SHIFT_BOOL |
da1adea0 | 815 | bool "Set custom data alignment" |
0f4a9041 | 816 | depends on ADVANCED_OPTIONS |
90cbac0e | 817 | depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE |
49e3d8ea | 818 | depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \ |
dfc3095c | 819 | PPC_85xx |
0f4a9041 CL |
820 | help |
821 | This option allows you to set the kernel data alignment. When | |
822 | RAM is mapped by blocks, the alignment needs to fit the size and | |
823 | number of possible blocks. The default should be OK for most configs. | |
824 | ||
825 | Say N here unless you know what you are doing. | |
166d97d9 CL |
826 | |
827 | config DATA_SHIFT | |
0f4a9041 | 828 | int "Data shift" if DATA_SHIFT_BOOL |
166d97d9 | 829 | default 24 if STRICT_KERNEL_RWX && PPC64 |
90cbac0e CL |
830 | range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
831 | range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx | |
dfc3095c | 832 | range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx |
63b2bc61 | 833 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
90cbac0e | 834 | default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
8f54a6f7 | 835 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
90cbac0e CL |
836 | default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA |
837 | default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx | |
dfc3095c | 838 | default 24 if STRICT_KERNEL_RWX && PPC_85xx |
166d97d9 | 839 | default PPC_PAGE_SHIFT |
0f4a9041 CL |
840 | help |
841 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. | |
842 | Smaller is the alignment, greater is the number of necessary DBATs. | |
166d97d9 | 843 | |
8f54a6f7 CL |
844 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
845 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used | |
da1adea0 CL |
846 | in that case. If PIN_TLB is selected, it must be aligned to 8M as |
847 | 8M pages will be pinned. | |
8f54a6f7 | 848 | |
0192445c | 849 | config ARCH_FORCE_MAX_ORDER |
53bcddb9 | 850 | int "Maximum zone order" |
a7ee5395 | 851 | range 8 9 if PPC64 && PPC_64K_PAGES |
066c4b87 | 852 | default "9" if PPC64 && PPC_64K_PAGES |
d5a1e42c | 853 | range 13 13 if PPC64 && !PPC_64K_PAGES |
066c4b87 BH |
854 | default "13" if PPC64 && !PPC_64K_PAGES |
855 | range 9 64 if PPC32 && PPC_16K_PAGES | |
856 | default "9" if PPC32 && PPC_16K_PAGES | |
857 | range 7 64 if PPC32 && PPC_64K_PAGES | |
858 | default "7" if PPC32 && PPC_64K_PAGES | |
859 | range 5 64 if PPC32 && PPC_256K_PAGES | |
860 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 861 | range 11 64 |
53bcddb9 SR |
862 | default "11" |
863 | help | |
864 | The kernel memory allocator divides physically contiguous memory | |
865 | blocks into "zones", where each zone is a power of two number of | |
866 | pages. This option selects the largest power of two that the kernel | |
867 | keeps in the memory allocator. If you need to allocate very large | |
868 | blocks of physically contiguous memory, then you may need to | |
869 | increase this value. | |
870 | ||
871 | This config option is actually maximum order plus one. For example, | |
872 | a value of 11 means that the largest free memory block is 2^10 pages. | |
873 | ||
874 | The page size is not necessarily 4KB. For example, on 64-bit | |
875 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
876 | this in mind when choosing a value for this option. | |
877 | ||
fa28237c | 878 | config PPC_SUBPAGE_PROT |
63396ada NP |
879 | bool "Support setting protections for 4k subpages (subpage_prot syscall)" |
880 | default n | |
c2857374 | 881 | depends on PPC_64S_HASH_MMU && PPC_64K_PAGES |
fa28237c | 882 | help |
63396ada | 883 | This option adds support for system call to allow user programs |
fa28237c PM |
884 | to set access permissions (read/write, readonly, or no access) |
885 | on the 4k subpages of each 64k page. | |
886 | ||
63396ada NP |
887 | If unsure, say N here. |
888 | ||
9b725a90 SA |
889 | config PPC_PROT_SAO_LPAR |
890 | bool "Support PROT_SAO mappings in LPARs" | |
891 | depends on PPC_BOOK3S_64 | |
892 | help | |
893 | This option adds support for PROT_SAO mappings from userspace | |
894 | inside LPARs on supported CPUs. | |
895 | ||
896 | This may cause issues when performing guest migration from | |
897 | a CPU that supports SAO to one that does not. | |
898 | ||
899 | If unsure, say N here. | |
900 | ||
e83d0169 IM |
901 | config PPC_COPRO_BASE |
902 | bool | |
e83d0169 | 903 | |
14cf11af PM |
904 | config SCHED_SMT |
905 | bool "SMT (Hyperthreading) scheduler support" | |
906 | depends on PPC64 && SMP | |
14cf11af PM |
907 | help |
908 | SMT scheduler support improves the CPU scheduler's decision making | |
909 | when dealing with POWER5 cpus at a cost of slightly increased | |
910 | overhead in some places. If unsure say N here. | |
911 | ||
b92a66a6 MN |
912 | config PPC_DENORMALISATION |
913 | bool "PowerPC denormalisation exception handling" | |
914 | depends on PPC_BOOK3S_64 | |
4e90a2a7 | 915 | default "y" if PPC_POWERNV |
4f44e8ae | 916 | help |
b92a66a6 MN |
917 | Add support for handling denormalisation of single precision |
918 | values. Useful for bare metal only. If unsure say Y here. | |
919 | ||
14cf11af | 920 | config CMDLINE |
f134a7ce | 921 | string "Initial kernel command string" |
cbe46bd4 | 922 | default "" |
14cf11af PM |
923 | help |
924 | On some platforms, there is currently no way for the boot loader to | |
925 | pass arguments to the kernel. For these platforms, you can supply | |
926 | some command-line options at build time by entering them here. In | |
927 | most cases you will need to specify the root device here. | |
928 | ||
d79fbb3a CP |
929 | choice |
930 | prompt "Kernel command line type" if CMDLINE != "" | |
931 | default CMDLINE_FROM_BOOTLOADER | |
932 | ||
933 | config CMDLINE_FROM_BOOTLOADER | |
934 | bool "Use bootloader kernel arguments if available" | |
935 | help | |
936 | Uses the command-line options passed by the boot loader. If | |
937 | the boot loader doesn't provide any, the default kernel command | |
938 | string provided in CMDLINE will be used. | |
939 | ||
940 | config CMDLINE_EXTEND | |
941 | bool "Extend bootloader kernel arguments" | |
942 | help | |
943 | The command-line arguments provided by the boot loader will be | |
944 | appended to the default kernel command string. | |
945 | ||
eb3b80f6 SS |
946 | config CMDLINE_FORCE |
947 | bool "Always use the default kernel command string" | |
eb3b80f6 SS |
948 | help |
949 | Always use the default kernel command string, even if the boot | |
950 | loader passes other arguments to the kernel. | |
951 | This is useful if you cannot or don't want to change the | |
952 | command-line options your boot loader passes to the kernel. | |
953 | ||
d79fbb3a CP |
954 | endchoice |
955 | ||
c356aa45 GL |
956 | config EXTRA_TARGETS |
957 | string "Additional default image types" | |
958 | help | |
959 | List additional targets to be built by the bootwrapper here (separated | |
960 | by spaces). This is useful for targets that depend of device tree | |
961 | files in the .dts directory. | |
962 | ||
963 | Targets in this list will be build as part of the default build | |
964 | target, or when the user does a 'make zImage' or a | |
965 | 'make zImage.initrd'. | |
966 | ||
967 | If unsure, leave blank | |
968 | ||
b28f5081 JB |
969 | config ARCH_WANTS_FREEZER_CONTROL |
970 | def_bool y | |
971 | depends on ADB_PMU | |
972 | ||
8636a1f9 | 973 | source "kernel/power/Kconfig" |
14cf11af | 974 | |
92e3da3c RP |
975 | config PPC_MEM_KEYS |
976 | prompt "PowerPC Memory Protection Keys" | |
977 | def_bool y | |
978 | depends on PPC_BOOK3S_64 | |
c2857374 | 979 | depends on PPC_64S_HASH_MMU |
92e3da3c RP |
980 | select ARCH_USES_HIGH_VMA_FLAGS |
981 | select ARCH_HAS_PKEYS | |
982 | help | |
983 | Memory Protection Keys provides a mechanism for enforcing | |
984 | page-based protections, but without requiring modification of the | |
985 | page tables when an application changes protection domains. | |
986 | ||
1eecbcdc | 987 | For details, see Documentation/core-api/protection-keys.rst |
92e3da3c RP |
988 | |
989 | If unsure, say y. | |
990 | ||
1a8916ee NJ |
991 | config PPC_SECURE_BOOT |
992 | prompt "Enable secure boot support" | |
993 | bool | |
5c5e46da | 994 | depends on PPC_POWERNV || PPC_PSERIES |
4238fad3 | 995 | depends on IMA_ARCH_POLICY |
9e2b4be3 | 996 | imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
1a8916ee NJ |
997 | help |
998 | Systems with firmware secure boot enabled need to define security | |
999 | policies to extend secure boot to the OS. This config allows a user | |
1000 | to enable OS secure boot on systems that have firmware support for | |
1001 | it. If in doubt say N. | |
1002 | ||
bd5d9c74 NJ |
1003 | config PPC_SECVAR_SYSFS |
1004 | bool "Enable sysfs interface for POWER secure variables" | |
1005 | default y | |
1006 | depends on PPC_SECURE_BOOT | |
1007 | depends on SYSFS | |
1008 | help | |
1009 | POWER secure variables are managed and controlled by firmware. | |
1010 | These variables are exposed to userspace via sysfs to enable | |
1011 | read/write operations on these variables. Say Y if you have | |
1012 | secure boot enabled and want to expose variables to userspace. | |
1013 | ||
bd59380c AD |
1014 | config PPC_RTAS_FILTER |
1015 | bool "Enable filtering of RTAS syscalls" | |
1016 | default y | |
1017 | depends on PPC_RTAS | |
1018 | help | |
1019 | The RTAS syscall API has security issues that could be used to | |
1020 | compromise system integrity. This option enforces restrictions on the | |
1021 | RTAS calls and arguments passed by userspace programs to mitigate | |
1022 | these issues. | |
1023 | ||
1024 | Say Y unless you know what you are doing and the filter is causing | |
1025 | problems for you. | |
1026 | ||
14cf11af PM |
1027 | endmenu |
1028 | ||
1029 | config ISA_DMA_API | |
1030 | bool | |
3d066d77 | 1031 | default PCI |
14cf11af PM |
1032 | |
1033 | menu "Bus options" | |
1034 | ||
1035 | config ISA | |
1036 | bool "Support for ISA-bus hardware" | |
933ee711 | 1037 | depends on PPC_CHRP |
f9bd170a | 1038 | select PPC_I8259 |
14cf11af PM |
1039 | help |
1040 | Find out whether you have ISA slots on your motherboard. ISA is the | |
1041 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
1042 | inside your box. If you have an Apple machine, say N here; if you | |
933ee711 PB |
1043 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
1044 | embedded board, consult your board documentation. | |
14cf11af PM |
1045 | |
1046 | config GENERIC_ISA_DMA | |
1047 | bool | |
1927445a | 1048 | depends on ISA_DMA_API |
14cf11af PM |
1049 | default y |
1050 | ||
25635c71 PM |
1051 | config PPC_INDIRECT_PCI |
1052 | bool | |
1053 | depends on PCI | |
63dafe57 | 1054 | default y if 40x || 44x |
25635c71 | 1055 | |
14cf11af PM |
1056 | config SBUS |
1057 | bool | |
1058 | ||
08264cbc KG |
1059 | config FSL_SOC |
1060 | bool | |
1061 | ||
55c44991 | 1062 | config FSL_PCI |
4f44e8ae | 1063 | bool |
11ddce15 | 1064 | select ARCH_HAS_DMA_SET_MASK |
55c44991 | 1065 | select PPC_INDIRECT_PCI |
d0839118 | 1066 | select PCI_QUIRKS |
55c44991 | 1067 | |
4ffd6952 AV |
1068 | config FSL_PMC |
1069 | bool | |
1070 | default y | |
1071 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
1072 | help | |
1073 | Freescale MPC85xx/MPC86xx power management controller support | |
1074 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
1075 | ||
d164f6d4 VG |
1076 | config PPC4xx_CPM |
1077 | bool | |
1078 | default y | |
1079 | depends on SUSPEND && (44x || 40x) | |
1080 | help | |
1081 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
1082 | It also enables support for two different idle states (idle-wait | |
1083 | and idle-doze). | |
1084 | ||
2a706919 SR |
1085 | config 4xx_SOC |
1086 | bool | |
1087 | ||
acaa7aa3 | 1088 | config FSL_LBC |
3ab8f2a2 | 1089 | bool "Freescale Local Bus support" |
acaa7aa3 | 1090 | help |
3ab8f2a2 RZ |
1091 | Enables reporting of errors from the Freescale local bus |
1092 | controller. Also contains some common code used by | |
1093 | drivers for specific local bus peripherals. | |
acaa7aa3 | 1094 | |
83ff9dcf AV |
1095 | config FSL_GTM |
1096 | bool | |
1097 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
1098 | help | |
1099 | Freescale General-purpose Timers support | |
1100 | ||
14cf11af PM |
1101 | config PCI_8260 |
1102 | bool | |
1103 | depends on PCI && 8260 | |
25635c71 | 1104 | select PPC_INDIRECT_PCI |
14cf11af PM |
1105 | default y |
1106 | ||
388b78ad AB |
1107 | config FSL_RIO |
1108 | bool "Freescale Embedded SRIO Controller support" | |
1753d50c | 1109 | depends on RAPIDIO = y && HAVE_RAPIDIO |
388b78ad | 1110 | default "n" |
4f44e8ae | 1111 | help |
388b78ad AB |
1112 | Include support for RapidIO controller on Freescale embedded |
1113 | processors (MPC8548, MPC8641, etc). | |
1114 | ||
14cf11af PM |
1115 | endmenu |
1116 | ||
0f890c8d SP |
1117 | config NONSTATIC_KERNEL |
1118 | bool | |
0f890c8d | 1119 | |
14cf11af PM |
1120 | menu "Advanced setup" |
1121 | depends on PPC32 | |
1122 | ||
1123 | config ADVANCED_OPTIONS | |
1124 | bool "Prompt for advanced kernel configuration options" | |
1125 | help | |
1126 | This option will enable prompting for a variety of advanced kernel | |
1127 | configuration options. These options can cause the kernel to not | |
1128 | work if they are set incorrectly, but can be used to optimize certain | |
1129 | aspects of kernel memory management. | |
1130 | ||
1131 | Unless you know what you are doing, say N here. | |
1132 | ||
1133 | comment "Default settings for advanced configuration options are used" | |
1134 | depends on !ADVANCED_OPTIONS | |
1135 | ||
14cf11af PM |
1136 | config LOWMEM_SIZE_BOOL |
1137 | bool "Set maximum low memory" | |
1138 | depends on ADVANCED_OPTIONS | |
1139 | help | |
1140 | This option allows you to set the maximum amount of memory which | |
1141 | will be used as "low memory", that is, memory which the kernel can | |
1142 | access directly, without having to set up a kernel virtual mapping. | |
1143 | This can be useful in optimizing the layout of kernel virtual | |
1144 | memory. | |
1145 | ||
1146 | Say N here unless you know what you are doing. | |
1147 | ||
1148 | config LOWMEM_SIZE | |
1149 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
1150 | default "0x30000000" | |
1151 | ||
96051465 TP |
1152 | config LOWMEM_CAM_NUM_BOOL |
1153 | bool "Set number of CAMs to use to map low memory" | |
dfc3095c | 1154 | depends on ADVANCED_OPTIONS && PPC_85xx |
96051465 TP |
1155 | help |
1156 | This option allows you to set the maximum number of CAM slots that | |
1157 | will be used to map low memory. There are a limited number of slots | |
1158 | available and even more limited number that will fit in the L1 MMU. | |
1159 | However, using more entries will allow mapping more low memory. This | |
1160 | can be useful in optimizing the layout of kernel virtual memory. | |
1161 | ||
1162 | Say N here unless you know what you are doing. | |
1163 | ||
1164 | config LOWMEM_CAM_NUM | |
dfc3095c | 1165 | depends on PPC_85xx |
96051465 | 1166 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
49e3d8ea CL |
1167 | default 3 if !STRICT_KERNEL_RWX |
1168 | default 9 if DATA_SHIFT >= 24 | |
1169 | default 12 if DATA_SHIFT >= 22 | |
1170 | default 15 | |
96051465 | 1171 | |
0f890c8d | 1172 | config DYNAMIC_MEMSTART |
642e56ff | 1173 | bool "Enable page aligned dynamic load address for kernel" |
dfc3095c | 1174 | depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x) |
0f890c8d SP |
1175 | select NONSTATIC_KERNEL |
1176 | help | |
1177 | This option enables the kernel to be loaded at any page aligned | |
4f44e8ae | 1178 | physical address. The kernel creates a mapping from KERNELBASE to |
0f890c8d SP |
1179 | the address where the kernel is loaded. The page size here implies |
1180 | the TLB page size of the mapping for kernel on the particular platform. | |
1181 | Please refer to the init code for finding the TLB page size. | |
1182 | ||
1183 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
1184 | kernel image, where the only restriction is the page aligned kernel | |
4f44e8ae | 1185 | load address. When this option is enabled, the compile time physical |
0f890c8d SP |
1186 | address CONFIG_PHYSICAL_START is ignored. |
1187 | ||
9c5f7d39 SP |
1188 | This option is overridden by CONFIG_RELOCATABLE |
1189 | ||
37dd2bad KG |
1190 | config PAGE_OFFSET_BOOL |
1191 | bool "Set custom page offset address" | |
1192 | depends on ADVANCED_OPTIONS | |
1193 | help | |
1194 | This option allows you to set the kernel virtual address at which | |
1195 | the kernel will map low memory. This can be useful in optimizing | |
1196 | the virtual memory layout of the system. | |
1197 | ||
1198 | Say N here unless you know what you are doing. | |
1199 | ||
1200 | config PAGE_OFFSET | |
1201 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
1202 | default "0xc0000000" | |
1203 | ||
14cf11af PM |
1204 | config KERNEL_START_BOOL |
1205 | bool "Set custom kernel base address" | |
1206 | depends on ADVANCED_OPTIONS | |
1207 | help | |
1208 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
1209 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
1210 | however there are times (like kdump) that one might not want them | |
1211 | to be the same. | |
14cf11af PM |
1212 | |
1213 | Say N here unless you know what you are doing. | |
1214 | ||
1215 | config KERNEL_START | |
1216 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 1217 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
0f890c8d | 1218 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
14cf11af PM |
1219 | default "0xc0000000" |
1220 | ||
37dd2bad KG |
1221 | config PHYSICAL_START_BOOL |
1222 | bool "Set physical address where the kernel is loaded" | |
dfc3095c | 1223 | depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx |
37dd2bad KG |
1224 | help |
1225 | This gives the physical address where the kernel is loaded. | |
1226 | ||
1227 | Say N here unless you know what you are doing. | |
1228 | ||
1229 | config PHYSICAL_START | |
1230 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
26598f28 | 1231 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
37dd2bad KG |
1232 | default "0x00000000" |
1233 | ||
1234 | config PHYSICAL_ALIGN | |
1235 | hex | |
dfc3095c | 1236 | default "0x04000000" if PPC_85xx |
37dd2bad KG |
1237 | help |
1238 | This value puts the alignment restrictions on physical address | |
1239 | where kernel is loaded and run from. Kernel is compiled for an | |
1240 | address which meets above alignment restriction. | |
1241 | ||
14cf11af PM |
1242 | config TASK_SIZE_BOOL |
1243 | bool "Set custom user task size" | |
1244 | depends on ADVANCED_OPTIONS | |
1245 | help | |
1246 | This option allows you to set the amount of virtual address space | |
1247 | allocated to user tasks. This can be useful in optimizing the | |
1248 | virtual memory layout of the system. | |
1249 | ||
1250 | Say N here unless you know what you are doing. | |
1251 | ||
1252 | config TASK_SIZE | |
1253 | hex "Size of user task space" if TASK_SIZE_BOOL | |
933ee711 | 1254 | default "0x80000000" if PPC_8xx |
80edc68e | 1255 | default "0xb0000000" if PPC_BOOK3S_32 |
4d9e5510 | 1256 | default "0xc0000000" |
14cf11af PM |
1257 | endmenu |
1258 | ||
cabb5587 | 1259 | if PPC64 |
bdbc29c1 | 1260 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
37dd2bad KG |
1261 | config PAGE_OFFSET |
1262 | hex | |
1263 | default "0xc000000000000000" | |
cabb5587 SR |
1264 | config KERNEL_START |
1265 | hex | |
eeb2d218 | 1266 | default "0xc000000000000000" |
37dd2bad KG |
1267 | config PHYSICAL_START |
1268 | hex | |
37dd2bad | 1269 | default "0x00000000" |
cabb5587 SR |
1270 | endif |
1271 | ||
1088a209 SM |
1272 | config PPC_LIB_RHEAP |
1273 | bool | |
1274 | ||
bbf45ba5 | 1275 | source "arch/powerpc/kvm/Kconfig" |
85baa095 ME |
1276 | |
1277 | source "kernel/livepatch/Kconfig" |