| 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | source "arch/powerpc/platforms/Kconfig.cputype" |
| 3 | |
| 4 | config CC_HAS_ELFV2 |
| 5 | def_bool PPC64 && $(cc-option, -mabi=elfv2) |
| 6 | |
| 7 | config CC_HAS_PREFIXED |
| 8 | def_bool PPC64 && $(cc-option, -mcpu=power10 -mprefixed) |
| 9 | |
| 10 | config CC_HAS_PCREL |
| 11 | # Clang has a bug (https://github.com/llvm/llvm-project/issues/62372) |
| 12 | # where pcrel code is not generated if -msoft-float, -mno-altivec, or |
| 13 | # -mno-vsx options are also given. Without these options, fp/vec |
| 14 | # instructions are generated from regular kernel code. So Clang can't |
| 15 | # do pcrel yet. |
| 16 | def_bool PPC64 && CC_IS_GCC && $(cc-option, -mcpu=power10 -mpcrel) |
| 17 | |
| 18 | config 32BIT |
| 19 | bool |
| 20 | default y if PPC32 |
| 21 | |
| 22 | config 64BIT |
| 23 | bool |
| 24 | default y if PPC64 |
| 25 | |
| 26 | config LIVEPATCH_64 |
| 27 | def_bool PPC64 |
| 28 | depends on LIVEPATCH |
| 29 | |
| 30 | config MMU |
| 31 | bool |
| 32 | default y |
| 33 | |
| 34 | config ARCH_MMAP_RND_BITS_MAX |
| 35 | # On Book3S 64, the default virtual address space for 64-bit processes |
| 36 | # is 2^47 (128TB). As a maximum, allow randomisation to consume up to |
| 37 | # 32T of address space (2^45), which should ensure a reasonable gap |
| 38 | # between bottom-up and top-down allocations for applications that |
| 39 | # consume "normal" amounts of address space. Book3S 64 only supports 64K |
| 40 | # and 4K page sizes. |
| 41 | default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) |
| 42 | default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) |
| 43 | # |
| 44 | # On all other 64-bit platforms (currently only Book3E), the virtual |
| 45 | # address space is 2^46 (64TB). Allow randomisation to consume up to 16T |
| 46 | # of address space (2^44). Only 4K page sizes are supported. |
| 47 | default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) |
| 48 | # |
| 49 | # For 32-bit, use the compat values, as they're the same. |
| 50 | default ARCH_MMAP_RND_COMPAT_BITS_MAX |
| 51 | |
| 52 | config ARCH_MMAP_RND_BITS_MIN |
| 53 | # Allow randomisation to consume up to 1GB of address space (2^30). |
| 54 | default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) |
| 55 | default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) |
| 56 | # |
| 57 | # For 32-bit, use the compat values, as they're the same. |
| 58 | default ARCH_MMAP_RND_COMPAT_BITS_MIN |
| 59 | |
| 60 | config ARCH_MMAP_RND_COMPAT_BITS_MAX |
| 61 | # Total virtual address space for 32-bit processes is 2^31 (2GB). |
| 62 | # Allow randomisation to consume up to 512MB of address space (2^29). |
| 63 | default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) |
| 64 | default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) |
| 65 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
| 66 | default 17 # 17 = 29 (512MB) - 12 (4K) |
| 67 | |
| 68 | config ARCH_MMAP_RND_COMPAT_BITS_MIN |
| 69 | # Total virtual address space for 32-bit processes is 2^31 (2GB). |
| 70 | # Allow randomisation to consume up to 8MB of address space (2^23). |
| 71 | default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) |
| 72 | default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) |
| 73 | default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) |
| 74 | default 11 # 11 = 23 (8MB) - 12 (4K) |
| 75 | |
| 76 | config NR_IRQS |
| 77 | int "Number of virtual interrupt numbers" |
| 78 | range 32 1048576 |
| 79 | default "512" |
| 80 | help |
| 81 | This defines the number of virtual interrupt numbers the kernel |
| 82 | can manage. Virtual interrupt numbers are what you see in |
| 83 | /proc/interrupts. If you configure your system to have too few, |
| 84 | drivers will fail to load or worse - handle with care. |
| 85 | |
| 86 | config NMI_IPI |
| 87 | bool |
| 88 | depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
| 89 | default y |
| 90 | |
| 91 | config PPC_WATCHDOG |
| 92 | bool |
| 93 | depends on HARDLOCKUP_DETECTOR_ARCH |
| 94 | default y |
| 95 | help |
| 96 | This is a placeholder when the powerpc hardlockup detector |
| 97 | watchdog is selected (arch/powerpc/kernel/watchdog.c). It is |
| 98 | selected via the generic lockup detector menu which is why we |
| 99 | have no standalone config option for it here. |
| 100 | |
| 101 | config STACKTRACE_SUPPORT |
| 102 | bool |
| 103 | default y |
| 104 | |
| 105 | config LOCKDEP_SUPPORT |
| 106 | bool |
| 107 | default y |
| 108 | |
| 109 | config GENERIC_LOCKBREAK |
| 110 | bool |
| 111 | default y |
| 112 | depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS |
| 113 | |
| 114 | config GENERIC_HWEIGHT |
| 115 | bool |
| 116 | default y |
| 117 | |
| 118 | config PPC |
| 119 | bool |
| 120 | default y |
| 121 | # |
| 122 | # Please keep this list sorted alphabetically. |
| 123 | # |
| 124 | select ARCH_32BIT_OFF_T if PPC32 |
| 125 | select ARCH_NEEDS_DEFER_KASAN if PPC_RADIX_MMU |
| 126 | select ARCH_DISABLE_KASAN_INLINE if PPC_RADIX_MMU |
| 127 | select ARCH_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
| 128 | select ARCH_ENABLE_MEMORY_HOTPLUG |
| 129 | select ARCH_HAS_COPY_MC if PPC64 |
| 130 | select ARCH_HAS_CURRENT_STACK_POINTER |
| 131 | select ARCH_HAS_DEBUG_VIRTUAL |
| 132 | select ARCH_HAS_DEBUG_VM_PGTABLE |
| 133 | select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX |
| 134 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
| 135 | select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES |
| 136 | select ARCH_HAS_DMA_OPS if PPC64 |
| 137 | select ARCH_HAS_FORTIFY_SOURCE |
| 138 | select ARCH_HAS_GCOV_PROFILE_ALL |
| 139 | select ARCH_HAS_GIGANTIC_PAGE if ARCH_SUPPORTS_HUGETLBFS |
| 140 | select ARCH_HAS_KCOV |
| 141 | select ARCH_HAS_KERNEL_FPU_SUPPORT if PPC64 && PPC_FPU |
| 142 | select ARCH_HAS_MEMBARRIER_CALLBACKS |
| 143 | select ARCH_HAS_MEMBARRIER_SYNC_CORE |
| 144 | select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU |
| 145 | select ARCH_HAS_MMIOWB if PPC64 |
| 146 | select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
| 147 | select ARCH_HAS_PHYS_TO_DMA |
| 148 | select ARCH_HAS_PMEM_API |
| 149 | select ARCH_HAS_PREEMPT_LAZY |
| 150 | select ARCH_HAS_PTDUMP |
| 151 | select ARCH_HAS_PTE_SPECIAL |
| 152 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
| 153 | select ARCH_HAS_SET_MEMORY |
| 154 | select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx) && !HIBERNATION |
| 155 | select ARCH_HAS_STRICT_KERNEL_RWX if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE |
| 156 | select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
| 157 | select ARCH_HAS_SYSCALL_WRAPPER if !SPU_BASE && !COMPAT |
| 158 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
| 159 | select ARCH_HAS_UACCESS_FLUSHCACHE |
| 160 | select ARCH_HAS_UBSAN |
| 161 | select ARCH_HAS_VDSO_ARCH_DATA |
| 162 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| 163 | select ARCH_KEEP_MEMBLOCK |
| 164 | select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU |
| 165 | select ARCH_MIGHT_HAVE_PC_PARPORT |
| 166 | select ARCH_MIGHT_HAVE_PC_SERIO |
| 167 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
| 168 | select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT |
| 169 | select ARCH_SPLIT_ARG64 if PPC32 |
| 170 | select ARCH_STACKWALK |
| 171 | select ARCH_SUPPORTS_ATOMIC_RMW |
| 172 | select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx |
| 173 | select ARCH_SUPPORTS_HUGE_PFNMAP if PPC_BOOK3S_64 && TRANSPARENT_HUGEPAGE |
| 174 | select ARCH_SUPPORTS_PAGE_TABLE_CHECK if !HUGETLB_PAGE |
| 175 | select ARCH_SUPPORTS_SCHED_MC if SMP |
| 176 | select ARCH_SUPPORTS_SCHED_SMT if PPC64 && SMP |
| 177 | select SCHED_MC if ARCH_SUPPORTS_SCHED_MC |
| 178 | select ARCH_USE_BUILTIN_BSWAP |
| 179 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
| 180 | select ARCH_USE_MEMTEST |
| 181 | select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS |
| 182 | select ARCH_WANT_DEFAULT_BPF_JIT |
| 183 | select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT |
| 184 | select ARCH_WANT_IPC_PARSE_VERSION |
| 185 | select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
| 186 | select ARCH_WANT_LD_ORPHAN_WARN |
| 187 | select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP if PPC_RADIX_MMU |
| 188 | select ARCH_WANTS_MODULES_DATA_IN_VMALLOC if PPC_BOOK3S_32 || PPC_8xx |
| 189 | select ARCH_WEAK_RELEASE_ACQUIRE |
| 190 | select AUDIT_ARCH_COMPAT_GENERIC |
| 191 | select BINFMT_ELF |
| 192 | select BUILDTIME_TABLE_SORT |
| 193 | select CLONE_BACKWARDS |
| 194 | select CPUMASK_OFFSTACK if NR_CPUS >= 8192 |
| 195 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
| 196 | select DMA_OPS_BYPASS if PPC64 |
| 197 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
| 198 | select EDAC_ATOMIC_SCRUB |
| 199 | select EDAC_SUPPORT |
| 200 | select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if ARCH_USING_PATCHABLE_FUNCTION_ENTRY |
| 201 | select FUNCTION_ALIGNMENT_4B |
| 202 | select GENERIC_ATOMIC64 if PPC32 |
| 203 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
| 204 | select GENERIC_CMOS_UPDATE |
| 205 | select GENERIC_CPU_AUTOPROBE |
| 206 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
| 207 | select GENERIC_EARLY_IOREMAP |
| 208 | select GENERIC_ENTRY |
| 209 | select GENERIC_GETTIMEOFDAY |
| 210 | select GENERIC_IDLE_POLL_SETUP |
| 211 | select GENERIC_IOREMAP |
| 212 | select GENERIC_IRQ_SHOW |
| 213 | select GENERIC_IRQ_SHOW_LEVEL |
| 214 | select GENERIC_PCI_IOMAP if PCI |
| 215 | select GENERIC_SMP_IDLE_THREAD |
| 216 | select HAS_IOPORT if PCI |
| 217 | select HAVE_ARCH_AUDITSYSCALL |
| 218 | select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP |
| 219 | select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx |
| 220 | select HAVE_ARCH_JUMP_LABEL |
| 221 | select HAVE_ARCH_JUMP_LABEL_RELATIVE |
| 222 | select HAVE_ARCH_KASAN if PPC32 && PAGE_SHIFT <= 14 |
| 223 | select HAVE_ARCH_KASAN if PPC_RADIX_MMU |
| 224 | select HAVE_ARCH_KASAN if PPC_BOOK3E_64 |
| 225 | select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN |
| 226 | select HAVE_ARCH_KCSAN |
| 227 | select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 228 | select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET |
| 229 | select HAVE_ARCH_WITHIN_STACK_FRAMES |
| 230 | select HAVE_ARCH_KGDB |
| 231 | select HAVE_ARCH_MMAP_RND_BITS |
| 232 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT |
| 233 | select HAVE_ARCH_NVRAM_OPS |
| 234 | select HAVE_ARCH_SECCOMP_FILTER |
| 235 | select HAVE_ARCH_TRACEHOOK |
| 236 | select HAVE_ASM_MODVERSIONS |
| 237 | select HAVE_CONTEXT_TRACKING_USER |
| 238 | select HAVE_C_RECORDMCOUNT |
| 239 | select HAVE_DEBUG_KMEMLEAK |
| 240 | select HAVE_DEBUG_STACKOVERFLOW |
| 241 | select HAVE_DYNAMIC_FTRACE |
| 242 | select HAVE_DYNAMIC_FTRACE_WITH_ARGS if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32 |
| 243 | select HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS if PPC_FTRACE_OUT_OF_LINE || (PPC32 && ARCH_USING_PATCHABLE_FUNCTION_ENTRY) |
| 244 | select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS if HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS |
| 245 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32 |
| 246 | select HAVE_EBPF_JIT |
| 247 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
| 248 | select HAVE_GUP_FAST |
| 249 | select HAVE_FTRACE_GRAPH_FUNC |
| 250 | select HAVE_FTRACE_REGS_HAVING_PT_REGS |
| 251 | select HAVE_FUNCTION_ARG_ACCESS_API |
| 252 | select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1 |
| 253 | select HAVE_FUNCTION_ERROR_INJECTION |
| 254 | select HAVE_FUNCTION_GRAPH_FREGS |
| 255 | select HAVE_FUNCTION_GRAPH_TRACER |
| 256 | select HAVE_FUNCTION_TRACER if !COMPILE_TEST && (PPC64 || (PPC32 && CC_IS_GCC)) |
| 257 | select HAVE_GCC_PLUGINS |
| 258 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP |
| 259 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI |
| 260 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
| 261 | select HAVE_IOREMAP_PROT |
| 262 | select HAVE_IRQ_TIME_ACCOUNTING |
| 263 | select HAVE_KERNEL_GZIP |
| 264 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
| 265 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
| 266 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
| 267 | select HAVE_KPROBES |
| 268 | select HAVE_KPROBES_ON_FTRACE |
| 269 | select HAVE_KRETPROBES |
| 270 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if HAVE_OBJTOOL_MCOUNT && (!ARCH_USING_PATCHABLE_FUNCTION_ENTRY || (!CC_IS_GCC || GCC_VERSION >= 110100)) |
| 271 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
| 272 | select HAVE_MOD_ARCH_SPECIFIC |
| 273 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
| 274 | select HAVE_OPTPROBES |
| 275 | select HAVE_OBJTOOL if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32 |
| 276 | select HAVE_OBJTOOL_MCOUNT if HAVE_OBJTOOL |
| 277 | select HAVE_PERF_EVENTS |
| 278 | select HAVE_PERF_EVENTS_NMI if PPC64 |
| 279 | select HAVE_PERF_REGS |
| 280 | select HAVE_PERF_USER_STACK_DUMP |
| 281 | select HAVE_POSIX_CPU_TIMERS_TASK_WORK |
| 282 | select HAVE_RETHOOK if KPROBES |
| 283 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 284 | select HAVE_RELIABLE_STACKTRACE |
| 285 | select HAVE_RSEQ |
| 286 | select HAVE_RUST if PPC32 |
| 287 | select HAVE_RUST if PPC64 && CPU_LITTLE_ENDIAN |
| 288 | select HAVE_SAMPLE_FTRACE_DIRECT if HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS |
| 289 | select HAVE_SAMPLE_FTRACE_DIRECT_MULTI if HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS |
| 290 | select HAVE_SETUP_PER_CPU_AREA if PPC64 |
| 291 | select HAVE_SOFTIRQ_ON_OWN_STACK |
| 292 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,$(m32-flag) -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 -mstack-protector-guard-offset=0) |
| 293 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,$(m64-flag) -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -mstack-protector-guard-offset=0) |
| 294 | select HAVE_STATIC_CALL if PPC32 |
| 295 | select HAVE_STATIC_CALL_INLINE if PPC32 |
| 296 | select HAVE_SYSCALL_TRACEPOINTS |
| 297 | select HAVE_VIRT_CPU_ACCOUNTING |
| 298 | select HAVE_VIRT_CPU_ACCOUNTING_GEN |
| 299 | select HOTPLUG_SMT if HOTPLUG_CPU |
| 300 | select SMT_NUM_THREADS_DYNAMIC |
| 301 | select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE |
| 302 | select IOMMU_HELPER if PPC64 |
| 303 | select IRQ_DOMAIN |
| 304 | select IRQ_FORCED_THREADING |
| 305 | select KASAN_VMALLOC if KASAN && EXECMEM |
| 306 | select LOCK_MM_AND_FIND_VMA |
| 307 | select MMU_GATHER_PAGE_SIZE |
| 308 | select MMU_GATHER_RCU_TABLE_FREE |
| 309 | select HAVE_ARCH_TLB_REMOVE_TABLE |
| 310 | select MMU_GATHER_MERGE_VMAS |
| 311 | select MMU_LAZY_TLB_SHOOTDOWN if PPC_BOOK3S_64 |
| 312 | select MODULES_USE_ELF_RELA |
| 313 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
| 314 | select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64 |
| 315 | select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64 |
| 316 | select NEED_SG_DMA_LENGTH |
| 317 | select OF |
| 318 | select OF_EARLY_FLATTREE |
| 319 | select OLD_SIGACTION if PPC32 |
| 320 | select OLD_SIGSUSPEND |
| 321 | select PCI_DOMAINS if PCI |
| 322 | select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
| 323 | select PCI_SYSCALL if PCI |
| 324 | select PPC_DAWR if PPC64 |
| 325 | select RTC_LIB |
| 326 | select SPARSE_IRQ |
| 327 | select STRICT_KERNEL_RWX if STRICT_MODULE_RWX |
| 328 | select SYSCTL_EXCEPTION_TRACE |
| 329 | select THREAD_INFO_IN_TASK |
| 330 | select TRACE_IRQFLAGS_SUPPORT |
| 331 | select VDSO_DATASTORE |
| 332 | select VDSO_GETRANDOM |
| 333 | # |
| 334 | # Please keep this list sorted alphabetically. |
| 335 | # |
| 336 | |
| 337 | config PPC_BARRIER_NOSPEC |
| 338 | bool |
| 339 | default y |
| 340 | depends on PPC_BOOK3S_64 || PPC_E500 |
| 341 | |
| 342 | config PPC_HAS_LBARX_LHARX |
| 343 | bool |
| 344 | |
| 345 | config EARLY_PRINTK |
| 346 | bool |
| 347 | default y |
| 348 | |
| 349 | config PANIC_TIMEOUT |
| 350 | int |
| 351 | default 180 |
| 352 | |
| 353 | config COMPAT |
| 354 | bool "Enable support for 32bit binaries" |
| 355 | depends on PPC64 |
| 356 | default y if !CPU_LITTLE_ENDIAN |
| 357 | select ARCH_WANT_OLD_COMPAT_IPC |
| 358 | select COMPAT_OLD_SIGACTION |
| 359 | |
| 360 | config SCHED_OMIT_FRAME_POINTER |
| 361 | bool |
| 362 | default y |
| 363 | |
| 364 | config ARCH_MAY_HAVE_PC_FDC |
| 365 | bool |
| 366 | default PCI |
| 367 | |
| 368 | config PPC_UDBG_16550 |
| 369 | bool |
| 370 | |
| 371 | config GENERIC_TBSYNC |
| 372 | bool |
| 373 | default y if PPC32 && SMP |
| 374 | |
| 375 | config GENERIC_BUG |
| 376 | bool |
| 377 | default y |
| 378 | depends on BUG |
| 379 | |
| 380 | config GENERIC_BUG_RELATIVE_POINTERS |
| 381 | def_bool y |
| 382 | depends on GENERIC_BUG |
| 383 | |
| 384 | config SYS_SUPPORTS_APM_EMULATION |
| 385 | default y if PMAC_APM_EMU |
| 386 | bool |
| 387 | |
| 388 | config EPAPR_BOOT |
| 389 | bool |
| 390 | help |
| 391 | Used to allow a board to specify it wants an ePAPR compliant wrapper. |
| 392 | |
| 393 | config DEFAULT_UIMAGE |
| 394 | bool |
| 395 | help |
| 396 | Used to allow a board to specify it wants a uImage built by default |
| 397 | |
| 398 | config ARCH_HIBERNATION_POSSIBLE |
| 399 | bool |
| 400 | default y |
| 401 | |
| 402 | config ARCH_SUSPEND_POSSIBLE |
| 403 | def_bool y |
| 404 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
| 405 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
| 406 | || 44x |
| 407 | |
| 408 | config ARCH_SUSPEND_NONZERO_CPU |
| 409 | def_bool y |
| 410 | depends on PPC_POWERNV || PPC_PSERIES |
| 411 | |
| 412 | config ARCH_HAS_ADD_PAGES |
| 413 | def_bool y |
| 414 | depends on ARCH_ENABLE_MEMORY_HOTPLUG |
| 415 | |
| 416 | config PPC_DCR_NATIVE |
| 417 | bool |
| 418 | |
| 419 | config PPC_DCR |
| 420 | bool |
| 421 | depends on PPC_DCR_NATIVE |
| 422 | default y |
| 423 | |
| 424 | config PPC_PCI_OF_BUS_MAP |
| 425 | bool "Use pci_to_OF_bus_map (deprecated)" |
| 426 | depends on PPC32 |
| 427 | depends on PPC_PMAC || PPC_CHRP |
| 428 | help |
| 429 | This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which |
| 430 | restricts the system to only having 256 PCI buses. On CHRP it also causes |
| 431 | the "pci-OF-bus-map" property to be created in the device tree. |
| 432 | |
| 433 | If unsure, say "N". |
| 434 | |
| 435 | config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT |
| 436 | depends on PPC32 |
| 437 | depends on !PPC_PCI_OF_BUS_MAP |
| 438 | bool "Assign PCI bus numbers from zero individually for each PCI domain" |
| 439 | default y |
| 440 | help |
| 441 | By default on PPC32 were PCI bus numbers unique across all PCI domains. |
| 442 | So system could have only 256 PCI buses independently of available |
| 443 | PCI domains. When this option is enabled then PCI bus numbers are |
| 444 | PCI domain dependent and each PCI controller on own domain can have |
| 445 | 256 PCI buses, like it is on other Linux architectures. |
| 446 | |
| 447 | config ARCH_SUPPORTS_UPROBES |
| 448 | def_bool y |
| 449 | |
| 450 | config PPC_ADV_DEBUG_REGS |
| 451 | bool |
| 452 | depends on BOOKE |
| 453 | default y |
| 454 | |
| 455 | config PPC_ADV_DEBUG_IACS |
| 456 | int |
| 457 | depends on PPC_ADV_DEBUG_REGS |
| 458 | default 4 if 44x |
| 459 | default 2 |
| 460 | |
| 461 | config PPC_ADV_DEBUG_DACS |
| 462 | int |
| 463 | depends on PPC_ADV_DEBUG_REGS |
| 464 | default 2 |
| 465 | |
| 466 | config PPC_ADV_DEBUG_DVCS |
| 467 | int |
| 468 | depends on PPC_ADV_DEBUG_REGS |
| 469 | default 2 if 44x |
| 470 | default 0 |
| 471 | |
| 472 | config PPC_ADV_DEBUG_DAC_RANGE |
| 473 | bool |
| 474 | depends on PPC_ADV_DEBUG_REGS && 44x |
| 475 | default y |
| 476 | |
| 477 | config PPC_DAWR |
| 478 | bool |
| 479 | |
| 480 | config PGTABLE_LEVELS |
| 481 | int |
| 482 | default 2 if !PPC64 |
| 483 | default 4 |
| 484 | |
| 485 | source "arch/powerpc/sysdev/Kconfig" |
| 486 | source "arch/powerpc/platforms/Kconfig" |
| 487 | |
| 488 | menu "Kernel options" |
| 489 | |
| 490 | config HIGHMEM |
| 491 | bool "High memory support" |
| 492 | depends on PPC32 |
| 493 | select KMAP_LOCAL |
| 494 | |
| 495 | source "kernel/Kconfig.hz" |
| 496 | |
| 497 | config MATH_EMULATION |
| 498 | bool "Math emulation" |
| 499 | depends on 44x || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT |
| 500 | select PPC_FPU_REGS |
| 501 | help |
| 502 | Some PowerPC chips designed for embedded applications do not have |
| 503 | a floating-point unit and therefore do not implement the |
| 504 | floating-point instructions in the PowerPC instruction set. If you |
| 505 | say Y here, the kernel will include code to emulate a floating-point |
| 506 | unit, which will allow programs that use floating-point |
| 507 | instructions to run. |
| 508 | |
| 509 | This is also useful to emulate missing (optional) instructions |
| 510 | such as fsqrt on cores that do have an FPU but do not implement |
| 511 | them (such as Freescale BookE). |
| 512 | |
| 513 | choice |
| 514 | prompt "Math emulation options" |
| 515 | default MATH_EMULATION_FULL |
| 516 | depends on MATH_EMULATION |
| 517 | |
| 518 | config MATH_EMULATION_FULL |
| 519 | bool "Emulate all the floating point instructions" |
| 520 | help |
| 521 | Select this option will enable the kernel to support to emulate |
| 522 | all the floating point instructions. If your SoC doesn't have |
| 523 | a FPU, you should select this. |
| 524 | |
| 525 | config MATH_EMULATION_HW_UNIMPLEMENTED |
| 526 | bool "Just emulate the FPU unimplemented instructions" |
| 527 | help |
| 528 | Select this if you know there does have a hardware FPU on your |
| 529 | SoC, but some floating point instructions are not implemented by that. |
| 530 | |
| 531 | endchoice |
| 532 | |
| 533 | config PPC_TRANSACTIONAL_MEM |
| 534 | bool "Transactional Memory support for POWERPC" |
| 535 | depends on PPC_BOOK3S_64 |
| 536 | depends on SMP |
| 537 | select ALTIVEC |
| 538 | select VSX |
| 539 | help |
| 540 | Support user-mode Transactional Memory on POWERPC. |
| 541 | |
| 542 | config PPC_UV |
| 543 | bool "Ultravisor support" |
| 544 | depends on KVM_BOOK3S_HV_POSSIBLE |
| 545 | depends on DEVICE_PRIVATE |
| 546 | default n |
| 547 | help |
| 548 | This option paravirtualizes the kernel to run in POWER platforms that |
| 549 | supports the Protected Execution Facility (PEF). On such platforms, |
| 550 | the ultravisor firmware runs at a privilege level above the |
| 551 | hypervisor. |
| 552 | |
| 553 | If unsure, say "N". |
| 554 | |
| 555 | config LD_HEAD_STUB_CATCH |
| 556 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT |
| 557 | depends on PPC64 |
| 558 | help |
| 559 | Very large kernels can cause linker branch stubs to be generated by |
| 560 | code in head_64.S, which moves the head text sections out of their |
| 561 | specified location. This option can work around the problem. |
| 562 | |
| 563 | If unsure, say "N". |
| 564 | |
| 565 | config MPROFILE_KERNEL |
| 566 | depends on PPC64_ELF_ABI_V2 && FUNCTION_TRACER |
| 567 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN |
| 568 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN |
| 569 | |
| 570 | config ARCH_USING_PATCHABLE_FUNCTION_ENTRY |
| 571 | depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2) |
| 572 | depends on $(cc-option,-fpatchable-function-entry=2) |
| 573 | def_bool y if PPC32 |
| 574 | def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) $(CLANG_FLAGS) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN |
| 575 | def_bool $(success,$(srctree)/arch/powerpc/tools/check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN |
| 576 | |
| 577 | config PPC_FTRACE_OUT_OF_LINE |
| 578 | def_bool PPC64 && ARCH_USING_PATCHABLE_FUNCTION_ENTRY |
| 579 | select ARCH_WANTS_PRE_LINK_VMLINUX |
| 580 | |
| 581 | config PPC_FTRACE_OUT_OF_LINE_NUM_RESERVE |
| 582 | int "Number of ftrace out-of-line stubs to reserve within .text" |
| 583 | depends on PPC_FTRACE_OUT_OF_LINE |
| 584 | default 32768 |
| 585 | help |
| 586 | Number of stubs to reserve for use by ftrace. This space is |
| 587 | reserved within .text, and is distinct from any additional space |
| 588 | added at the end of .text before the final vmlinux link. Set to |
| 589 | zero to have stubs only be generated at the end of vmlinux (only |
| 590 | if the size of vmlinux is less than 32MB). Set to a higher value |
| 591 | if building vmlinux larger than 48MB. |
| 592 | |
| 593 | config HOTPLUG_CPU |
| 594 | bool "Support for enabling/disabling CPUs" |
| 595 | depends on SMP && (PPC_PSERIES || \ |
| 596 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
| 597 | help |
| 598 | Say Y here to be able to disable and re-enable individual |
| 599 | CPUs at runtime on SMP machines. |
| 600 | |
| 601 | Say N if you are unsure. |
| 602 | |
| 603 | config INTERRUPT_SANITIZE_REGISTERS |
| 604 | bool "Clear gprs on interrupt arrival" |
| 605 | depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER |
| 606 | default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV |
| 607 | help |
| 608 | Reduce the influence of user register state on interrupt handlers and |
| 609 | syscalls through clearing user state from registers before handling |
| 610 | the exception. |
| 611 | |
| 612 | config PPC_QUEUED_SPINLOCKS |
| 613 | bool "Queued spinlocks" if EXPERT |
| 614 | depends on SMP |
| 615 | default PPC_BOOK3S_64 |
| 616 | help |
| 617 | Say Y here to use queued spinlocks which give better scalability and |
| 618 | fairness on large SMP and NUMA systems without harming single threaded |
| 619 | performance. |
| 620 | |
| 621 | config ARCH_CPU_PROBE_RELEASE |
| 622 | def_bool y |
| 623 | depends on HOTPLUG_CPU |
| 624 | |
| 625 | config PPC64_SUPPORTS_MEMORY_FAILURE |
| 626 | bool "Add support for memory hwpoison" |
| 627 | depends on PPC_BOOK3S_64 |
| 628 | default "y" if PPC_POWERNV |
| 629 | select ARCH_SUPPORTS_MEMORY_FAILURE |
| 630 | |
| 631 | config ARCH_SUPPORTS_KEXEC |
| 632 | def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP) |
| 633 | |
| 634 | config ARCH_SUPPORTS_KEXEC_FILE |
| 635 | def_bool PPC64 |
| 636 | |
| 637 | config ARCH_SUPPORTS_KEXEC_PURGATORY |
| 638 | def_bool y |
| 639 | |
| 640 | config ARCH_SELECTS_KEXEC_FILE |
| 641 | def_bool y |
| 642 | depends on KEXEC_FILE |
| 643 | select KEXEC_ELF |
| 644 | select HAVE_IMA_KEXEC if IMA |
| 645 | |
| 646 | config PPC64_BIG_ENDIAN_ELF_ABI_V2 |
| 647 | # Option is available to BFD, but LLD does not support ELFv1 so this is |
| 648 | # always true there. |
| 649 | prompt "Build big-endian kernel using ELF ABI V2" if LD_IS_BFD && EXPERT |
| 650 | def_bool y |
| 651 | depends on PPC64 && CPU_BIG_ENDIAN |
| 652 | depends on CC_HAS_ELFV2 |
| 653 | help |
| 654 | This builds the kernel image using the "Power Architecture 64-Bit ELF |
| 655 | V2 ABI Specification", which has a reduced stack overhead and faster |
| 656 | function calls. This internal kernel ABI option does not affect |
| 657 | userspace compatibility. |
| 658 | |
| 659 | The V2 ABI is standard for 64-bit little-endian, but for big-endian |
| 660 | it is less well tested by kernel and toolchain. However some distros |
| 661 | build userspace this way, and it can produce a functioning kernel. |
| 662 | |
| 663 | config RELOCATABLE |
| 664 | bool "Build a relocatable kernel" |
| 665 | depends on PPC64 || (FLATMEM && (44x || PPC_85xx)) |
| 666 | select NONSTATIC_KERNEL |
| 667 | help |
| 668 | This builds a kernel image that is capable of running at the |
| 669 | location the kernel is loaded at. For ppc32, there is no any |
| 670 | alignment restrictions, and this feature is a superset of |
| 671 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use |
| 672 | 16k-aligned base address. The kernel is linked as a |
| 673 | position-independent executable (PIE) and contains dynamic relocations |
| 674 | which are processed early in the bootup process. |
| 675 | |
| 676 | One use is for the kexec on panic case where the recovery kernel |
| 677 | must live at a different physical address than the primary |
| 678 | kernel. |
| 679 | |
| 680 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 681 | it has been loaded at and the compile time physical addresses |
| 682 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
| 683 | setting can still be useful to bootwrappers that need to know the |
| 684 | load address of the kernel (eg. u-boot/mkimage). |
| 685 | |
| 686 | config RANDOMIZE_BASE |
| 687 | bool "Randomize the address of the kernel image" |
| 688 | depends on PPC_85xx && FLATMEM |
| 689 | depends on RELOCATABLE |
| 690 | help |
| 691 | Randomizes the virtual address at which the kernel image is |
| 692 | loaded, as a security feature that deters exploit attempts |
| 693 | relying on knowledge of the location of kernel internals. |
| 694 | |
| 695 | If unsure, say Y. |
| 696 | |
| 697 | config RELOCATABLE_TEST |
| 698 | bool "Test relocatable kernel" |
| 699 | depends on (PPC64 && RELOCATABLE) |
| 700 | help |
| 701 | This runs the relocatable kernel at the address it was initially |
| 702 | loaded at, which tends to be non-zero and therefore test the |
| 703 | relocation code. |
| 704 | |
| 705 | config ARCH_SUPPORTS_CRASH_DUMP |
| 706 | def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP) |
| 707 | |
| 708 | config ARCH_DEFAULT_CRASH_DUMP |
| 709 | bool |
| 710 | default y if !PPC_BOOK3S_32 |
| 711 | |
| 712 | config ARCH_SELECTS_CRASH_DUMP |
| 713 | def_bool y |
| 714 | depends on CRASH_DUMP |
| 715 | select RELOCATABLE if PPC64 || 44x || PPC_85xx |
| 716 | |
| 717 | config ARCH_SUPPORTS_CRASH_HOTPLUG |
| 718 | def_bool y |
| 719 | depends on PPC64 |
| 720 | |
| 721 | config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION |
| 722 | def_bool CRASH_RESERVE |
| 723 | |
| 724 | config FA_DUMP |
| 725 | bool "Firmware-assisted dump" |
| 726 | depends on CRASH_DUMP && PPC64 && (PPC_RTAS || PPC_POWERNV) |
| 727 | help |
| 728 | A robust mechanism to get reliable kernel crash dump with |
| 729 | assistance from firmware. This approach does not use kexec, |
| 730 | instead firmware assists in booting the capture kernel |
| 731 | while preserving memory contents. Firmware-assisted dump |
| 732 | is meant to be a kdump replacement offering robustness and |
| 733 | speed not possible without system firmware assistance. |
| 734 | |
| 735 | If unsure, say "y". Only special kernels like petitboot may |
| 736 | need to say "N" here. |
| 737 | |
| 738 | config PRESERVE_FA_DUMP |
| 739 | bool "Preserve Firmware-assisted dump" |
| 740 | depends on PPC64 && PPC_POWERNV && !FA_DUMP |
| 741 | help |
| 742 | On a kernel with FA_DUMP disabled, this option helps to preserve |
| 743 | crash data from a previously crash'ed kernel. Useful when the next |
| 744 | memory preserving kernel boot would process this crash data. |
| 745 | Petitboot kernel is the typical usecase for this option. |
| 746 | |
| 747 | config OPAL_CORE |
| 748 | bool "Export OPAL memory as /sys/firmware/opal/core" |
| 749 | depends on PPC64 && PPC_POWERNV |
| 750 | help |
| 751 | This option uses the MPIPL support in firmware to provide an |
| 752 | ELF core of OPAL memory after a crash. The ELF core is exported |
| 753 | as /sys/firmware/opal/core file which is helpful in debugging |
| 754 | OPAL crashes using GDB. |
| 755 | |
| 756 | config IRQ_ALL_CPUS |
| 757 | bool "Distribute interrupts on all CPUs by default" |
| 758 | depends on SMP |
| 759 | help |
| 760 | This option gives the kernel permission to distribute IRQs across |
| 761 | multiple CPUs. Saying N here will route all IRQs to the first |
| 762 | CPU. Generally saying Y is safe, although some problems have been |
| 763 | reported with SMP Power Macintoshes with this option enabled. |
| 764 | |
| 765 | config NUMA |
| 766 | bool "NUMA Memory Allocation and Scheduler Support" |
| 767 | depends on PPC64 && SMP |
| 768 | default y if PPC_PSERIES || PPC_POWERNV |
| 769 | select USE_PERCPU_NUMA_NODE_ID |
| 770 | help |
| 771 | Enable NUMA (Non-Uniform Memory Access) support. |
| 772 | |
| 773 | The kernel will try to allocate memory used by a CPU on the |
| 774 | local memory controller of the CPU and add some more |
| 775 | NUMA awareness to the kernel. |
| 776 | |
| 777 | config NODES_SHIFT |
| 778 | int |
| 779 | default "8" if PPC64 |
| 780 | default "4" |
| 781 | depends on NUMA |
| 782 | |
| 783 | config HAVE_MEMORYLESS_NODES |
| 784 | def_bool y |
| 785 | depends on NUMA |
| 786 | |
| 787 | config ARCH_SELECT_MEMORY_MODEL |
| 788 | def_bool y |
| 789 | depends on PPC64 |
| 790 | |
| 791 | config ARCH_FLATMEM_ENABLE |
| 792 | def_bool y |
| 793 | depends on (PPC64 && !NUMA) || PPC32 |
| 794 | |
| 795 | config ARCH_SPARSEMEM_ENABLE |
| 796 | def_bool y |
| 797 | depends on PPC64 |
| 798 | select SPARSEMEM_VMEMMAP_ENABLE |
| 799 | |
| 800 | config ARCH_SPARSEMEM_DEFAULT |
| 801 | def_bool y |
| 802 | depends on PPC_BOOK3S_64 |
| 803 | |
| 804 | config ILLEGAL_POINTER_VALUE |
| 805 | hex |
| 806 | # This is roughly half way between the top of user space and the bottom |
| 807 | # of kernel space, which seems about as good as we can get. |
| 808 | default 0x5deadbeef0000000 if PPC64 |
| 809 | default 0 |
| 810 | |
| 811 | config ARCH_MEMORY_PROBE |
| 812 | def_bool y |
| 813 | depends on MEMORY_HOTPLUG |
| 814 | |
| 815 | choice |
| 816 | prompt "Page size" |
| 817 | default PPC_64K_PAGES if PPC_BOOK3S_64 |
| 818 | default PPC_4K_PAGES |
| 819 | help |
| 820 | Select the kernel logical page size. Increasing the page size |
| 821 | will reduce software overhead at each page boundary, allow |
| 822 | hardware prefetch mechanisms to be more effective, and allow |
| 823 | larger dma transfers increasing IO efficiency and reducing |
| 824 | overhead. However the utilization of memory will increase. |
| 825 | For example, each cached file will using a multiple of the |
| 826 | page size to hold its contents and the difference between the |
| 827 | end of file and the end of page is wasted. |
| 828 | |
| 829 | Some dedicated systems, such as software raid serving with |
| 830 | accelerated calculations, have shown significant increases. |
| 831 | |
| 832 | If you configure a 64 bit kernel for 64k pages but the |
| 833 | processor does not support them, then the kernel will simulate |
| 834 | them with 4k pages, loading them on demand, but with the |
| 835 | reduced software overhead and larger internal fragmentation. |
| 836 | For the 32 bit kernel, a large page option will not be offered |
| 837 | unless it is supported by the configured processor. |
| 838 | |
| 839 | If unsure, choose 4K_PAGES. |
| 840 | |
| 841 | config PPC_4K_PAGES |
| 842 | bool "4k page size" |
| 843 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 844 | select HAVE_PAGE_SIZE_4KB |
| 845 | |
| 846 | config PPC_16K_PAGES |
| 847 | bool "16k page size" |
| 848 | depends on 44x || PPC_8xx |
| 849 | select HAVE_PAGE_SIZE_16KB |
| 850 | |
| 851 | config PPC_64K_PAGES |
| 852 | bool "64k page size" |
| 853 | depends on 44x || PPC_BOOK3S_64 |
| 854 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 855 | select HAVE_PAGE_SIZE_64KB |
| 856 | |
| 857 | config PPC_256K_PAGES |
| 858 | bool "256k page size (Requires non-standard binutils settings)" |
| 859 | depends on 44x && !PPC_47x |
| 860 | select HAVE_PAGE_SIZE_256KB |
| 861 | help |
| 862 | Make the page size 256k. |
| 863 | |
| 864 | The kernel will only be able to run applications that have been |
| 865 | compiled with '-zmax-page-size' set to 256K (the default is 64K) using |
| 866 | binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE |
| 867 | definition from 0x10000 to 0x40000 in older versions. |
| 868 | |
| 869 | endchoice |
| 870 | |
| 871 | config THREAD_SHIFT |
| 872 | int "Thread shift" if EXPERT |
| 873 | range 13 15 |
| 874 | default "15" if PPC_256K_PAGES |
| 875 | default "15" if PPC_PSERIES || PPC_POWERNV |
| 876 | default "14" if PPC64 |
| 877 | default "13" |
| 878 | help |
| 879 | Used to define the stack size. The default is almost always what you |
| 880 | want. Only change this if you know what you are doing. |
| 881 | |
| 882 | config DATA_SHIFT_BOOL |
| 883 | bool "Set custom data alignment" |
| 884 | depends on ADVANCED_OPTIONS |
| 885 | depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE |
| 886 | depends on (PPC_8xx && !PIN_TLB_DATA && (!STRICT_KERNEL_RWX || !PIN_TLB_TEXT)) || \ |
| 887 | PPC_BOOK3S_32 || PPC_85xx |
| 888 | help |
| 889 | This option allows you to set the kernel data alignment. When |
| 890 | RAM is mapped by blocks, the alignment needs to fit the size and |
| 891 | number of possible blocks. The default should be OK for most configs. |
| 892 | |
| 893 | Say N here unless you know what you are doing. |
| 894 | |
| 895 | config DATA_SHIFT |
| 896 | int "Data shift" if DATA_SHIFT_BOOL |
| 897 | default 24 if STRICT_KERNEL_RWX && PPC64 |
| 898 | range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
| 899 | range 14 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx |
| 900 | range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx |
| 901 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
| 902 | default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
| 903 | default 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && \ |
| 904 | (PIN_TLB_DATA || PIN_TLB_TEXT) |
| 905 | default 19 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx |
| 906 | default 24 if STRICT_KERNEL_RWX && PPC_85xx |
| 907 | default PAGE_SHIFT |
| 908 | help |
| 909 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. |
| 910 | Smaller is the alignment, greater is the number of necessary DBATs. |
| 911 | |
| 912 | On 8xx, large pages (16kb or 512kb or 8M) are used to map kernel |
| 913 | linear memory. Aligning to 8M reduces TLB misses as only 8M pages |
| 914 | are used in that case. If PIN_TLB is selected, it must be aligned |
| 915 | to 8M as 8M pages will be pinned. |
| 916 | |
| 917 | config ARCH_FORCE_MAX_ORDER |
| 918 | int "Order of maximal physically contiguous allocations" |
| 919 | range 7 8 if PPC64 && PPC_64K_PAGES |
| 920 | default "8" if PPC64 && PPC_64K_PAGES |
| 921 | range 12 12 if PPC64 && !PPC_64K_PAGES |
| 922 | default "12" if PPC64 && !PPC_64K_PAGES |
| 923 | range 8 10 if PPC32 && PPC_16K_PAGES |
| 924 | default "8" if PPC32 && PPC_16K_PAGES |
| 925 | range 6 10 if PPC32 && PPC_64K_PAGES |
| 926 | default "6" if PPC32 && PPC_64K_PAGES |
| 927 | range 4 10 if PPC32 && PPC_256K_PAGES |
| 928 | default "4" if PPC32 && PPC_256K_PAGES |
| 929 | range 10 12 |
| 930 | default "10" |
| 931 | help |
| 932 | The kernel page allocator limits the size of maximal physically |
| 933 | contiguous allocations. The limit is called MAX_PAGE_ORDER and it |
| 934 | defines the maximal power of two of number of pages that can be |
| 935 | allocated as a single contiguous block. This option allows |
| 936 | overriding the default setting when ability to allocate very |
| 937 | large blocks of physically contiguous memory is required. |
| 938 | |
| 939 | The page size is not necessarily 4KB. For example, on 64-bit |
| 940 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
| 941 | this in mind when choosing a value for this option. |
| 942 | |
| 943 | Don't change if unsure. |
| 944 | |
| 945 | config PPC_SUBPAGE_PROT |
| 946 | bool "Support setting protections for 4k subpages (subpage_prot syscall)" |
| 947 | default n |
| 948 | depends on PPC_64S_HASH_MMU && PPC_64K_PAGES |
| 949 | help |
| 950 | This option adds support for system call to allow user programs |
| 951 | to set access permissions (read/write, readonly, or no access) |
| 952 | on the 4k subpages of each 64k page. |
| 953 | |
| 954 | If unsure, say N here. |
| 955 | |
| 956 | config PPC_PROT_SAO_LPAR |
| 957 | bool "Support PROT_SAO mappings in LPARs" |
| 958 | depends on PPC_BOOK3S_64 |
| 959 | help |
| 960 | This option adds support for PROT_SAO mappings from userspace |
| 961 | inside LPARs on supported CPUs. |
| 962 | |
| 963 | This may cause issues when performing guest migration from |
| 964 | a CPU that supports SAO to one that does not. |
| 965 | |
| 966 | If unsure, say N here. |
| 967 | |
| 968 | config PPC_COPRO_BASE |
| 969 | bool |
| 970 | |
| 971 | config PPC_DENORMALISATION |
| 972 | bool "PowerPC denormalisation exception handling" |
| 973 | depends on PPC_BOOK3S_64 |
| 974 | default "y" if PPC_POWERNV |
| 975 | help |
| 976 | Add support for handling denormalisation of single precision |
| 977 | values. Useful for bare metal only. If unsure say Y here. |
| 978 | |
| 979 | config CMDLINE |
| 980 | string "Initial kernel command string" |
| 981 | default "" |
| 982 | help |
| 983 | On some platforms, there is currently no way for the boot loader to |
| 984 | pass arguments to the kernel. For these platforms, you can supply |
| 985 | some command-line options at build time by entering them here. In |
| 986 | most cases you will need to specify the root device here. |
| 987 | |
| 988 | choice |
| 989 | prompt "Kernel command line type" |
| 990 | depends on CMDLINE != "" |
| 991 | default CMDLINE_FROM_BOOTLOADER |
| 992 | |
| 993 | config CMDLINE_FROM_BOOTLOADER |
| 994 | bool "Use bootloader kernel arguments if available" |
| 995 | help |
| 996 | Uses the command-line options passed by the boot loader. If |
| 997 | the boot loader doesn't provide any, the default kernel command |
| 998 | string provided in CMDLINE will be used. |
| 999 | |
| 1000 | config CMDLINE_EXTEND |
| 1001 | bool "Extend bootloader kernel arguments" |
| 1002 | help |
| 1003 | The command-line arguments provided by the boot loader will be |
| 1004 | appended to the default kernel command string. |
| 1005 | |
| 1006 | config CMDLINE_FORCE |
| 1007 | bool "Always use the default kernel command string" |
| 1008 | help |
| 1009 | Always use the default kernel command string, even if the boot |
| 1010 | loader passes other arguments to the kernel. |
| 1011 | This is useful if you cannot or don't want to change the |
| 1012 | command-line options your boot loader passes to the kernel. |
| 1013 | |
| 1014 | endchoice |
| 1015 | |
| 1016 | config EXTRA_TARGETS |
| 1017 | string "Additional default image types" |
| 1018 | help |
| 1019 | List additional targets to be built by the bootwrapper here (separated |
| 1020 | by spaces). This is useful for targets that depend of device tree |
| 1021 | files in the .dts directory. |
| 1022 | |
| 1023 | Targets in this list will be build as part of the default build |
| 1024 | target, or when the user does a 'make zImage' or a |
| 1025 | 'make zImage.initrd'. |
| 1026 | |
| 1027 | If unsure, leave blank |
| 1028 | |
| 1029 | config ARCH_WANTS_FREEZER_CONTROL |
| 1030 | def_bool y |
| 1031 | depends on ADB_PMU |
| 1032 | |
| 1033 | source "kernel/power/Kconfig" |
| 1034 | |
| 1035 | config PPC_MEM_KEYS |
| 1036 | prompt "PowerPC Memory Protection Keys" |
| 1037 | def_bool y |
| 1038 | depends on PPC_BOOK3S_64 |
| 1039 | depends on PPC_64S_HASH_MMU |
| 1040 | select ARCH_USES_HIGH_VMA_FLAGS |
| 1041 | select ARCH_HAS_PKEYS |
| 1042 | help |
| 1043 | Memory Protection Keys provides a mechanism for enforcing |
| 1044 | page-based protections, but without requiring modification of the |
| 1045 | page tables when an application changes protection domains. |
| 1046 | |
| 1047 | For details, see Documentation/core-api/protection-keys.rst |
| 1048 | |
| 1049 | If unsure, say y. |
| 1050 | |
| 1051 | config ARCH_PKEY_BITS |
| 1052 | int |
| 1053 | default 5 |
| 1054 | |
| 1055 | config PPC_SECURE_BOOT |
| 1056 | prompt "Enable secure boot support" |
| 1057 | bool |
| 1058 | depends on PPC_POWERNV || PPC_PSERIES |
| 1059 | depends on IMA_ARCH_POLICY |
| 1060 | imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
| 1061 | select PSERIES_PLPKS if PPC_PSERIES |
| 1062 | select HAVE_ARCH_GET_SECUREBOOT |
| 1063 | help |
| 1064 | Systems with firmware secure boot enabled need to define security |
| 1065 | policies to extend secure boot to the OS. This config allows a user |
| 1066 | to enable OS secure boot on systems that have firmware support for |
| 1067 | it. If in doubt say N. |
| 1068 | |
| 1069 | config PPC_SECVAR_SYSFS |
| 1070 | bool "Enable sysfs interface for POWER secure variables" |
| 1071 | default y |
| 1072 | depends on PPC_SECURE_BOOT |
| 1073 | depends on SYSFS |
| 1074 | help |
| 1075 | POWER secure variables are managed and controlled by firmware. |
| 1076 | These variables are exposed to userspace via sysfs to enable |
| 1077 | read/write operations on these variables. Say Y if you have |
| 1078 | secure boot enabled and want to expose variables to userspace. |
| 1079 | |
| 1080 | endmenu |
| 1081 | |
| 1082 | config ISA_DMA_API |
| 1083 | bool |
| 1084 | default PCI |
| 1085 | |
| 1086 | menu "Bus options" |
| 1087 | |
| 1088 | config ISA |
| 1089 | bool "Support for ISA-bus hardware" |
| 1090 | depends on PPC_CHRP |
| 1091 | select PPC_I8259 |
| 1092 | help |
| 1093 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 1094 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 1095 | inside your box. If you have an Apple machine, say N here; if you |
| 1096 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
| 1097 | embedded board, consult your board documentation. |
| 1098 | |
| 1099 | config GENERIC_ISA_DMA |
| 1100 | bool |
| 1101 | depends on ISA_DMA_API |
| 1102 | default y |
| 1103 | |
| 1104 | config PPC_INDIRECT_PCI |
| 1105 | bool |
| 1106 | depends on PCI |
| 1107 | default y if 44x |
| 1108 | |
| 1109 | config SBUS |
| 1110 | bool |
| 1111 | |
| 1112 | config FSL_SOC |
| 1113 | bool |
| 1114 | |
| 1115 | config FSL_PCI |
| 1116 | bool |
| 1117 | select ARCH_HAS_DMA_SET_MASK |
| 1118 | select PPC_INDIRECT_PCI |
| 1119 | select PCI_QUIRKS |
| 1120 | |
| 1121 | config FSL_PMC |
| 1122 | bool |
| 1123 | default y |
| 1124 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
| 1125 | help |
| 1126 | Freescale MPC85xx/MPC86xx power management controller support |
| 1127 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
| 1128 | |
| 1129 | config PPC4xx_CPM |
| 1130 | bool |
| 1131 | default y |
| 1132 | depends on SUSPEND && 44x |
| 1133 | help |
| 1134 | PPC4xx Clock Power Management (CPM) support (suspend/resume). |
| 1135 | It also enables support for two different idle states (idle-wait |
| 1136 | and idle-doze). |
| 1137 | |
| 1138 | config FSL_LBC |
| 1139 | bool "Freescale Local Bus support" |
| 1140 | help |
| 1141 | Enables reporting of errors from the Freescale local bus |
| 1142 | controller. Also contains some common code used by |
| 1143 | drivers for specific local bus peripherals. |
| 1144 | |
| 1145 | config FSL_GTM |
| 1146 | bool |
| 1147 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
| 1148 | help |
| 1149 | Freescale General-purpose Timers support |
| 1150 | |
| 1151 | config FSL_RIO |
| 1152 | bool "Freescale Embedded SRIO Controller support" |
| 1153 | depends on RAPIDIO = y && HAVE_RAPIDIO |
| 1154 | default "n" |
| 1155 | help |
| 1156 | Include support for RapidIO controller on Freescale embedded |
| 1157 | processors (MPC8548, MPC8641, etc). |
| 1158 | |
| 1159 | endmenu |
| 1160 | |
| 1161 | config NONSTATIC_KERNEL |
| 1162 | bool |
| 1163 | |
| 1164 | menu "Advanced setup" |
| 1165 | depends on PPC32 |
| 1166 | |
| 1167 | config ADVANCED_OPTIONS |
| 1168 | bool "Prompt for advanced kernel configuration options" |
| 1169 | help |
| 1170 | This option will enable prompting for a variety of advanced kernel |
| 1171 | configuration options. These options can cause the kernel to not |
| 1172 | work if they are set incorrectly, but can be used to optimize certain |
| 1173 | aspects of kernel memory management. |
| 1174 | |
| 1175 | Unless you know what you are doing, say N here. |
| 1176 | |
| 1177 | comment "Default settings for advanced configuration options are used" |
| 1178 | depends on !ADVANCED_OPTIONS |
| 1179 | |
| 1180 | config LOWMEM_SIZE_BOOL |
| 1181 | bool "Set maximum low memory" |
| 1182 | depends on ADVANCED_OPTIONS |
| 1183 | help |
| 1184 | This option allows you to set the maximum amount of memory which |
| 1185 | will be used as "low memory", that is, memory which the kernel can |
| 1186 | access directly, without having to set up a kernel virtual mapping. |
| 1187 | This can be useful in optimizing the layout of kernel virtual |
| 1188 | memory. |
| 1189 | |
| 1190 | Say N here unless you know what you are doing. |
| 1191 | |
| 1192 | config LOWMEM_SIZE |
| 1193 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
| 1194 | default "0x30000000" |
| 1195 | |
| 1196 | config LOWMEM_CAM_NUM_BOOL |
| 1197 | bool "Set number of CAMs to use to map low memory" |
| 1198 | depends on ADVANCED_OPTIONS && PPC_85xx |
| 1199 | help |
| 1200 | This option allows you to set the maximum number of CAM slots that |
| 1201 | will be used to map low memory. There are a limited number of slots |
| 1202 | available and even more limited number that will fit in the L1 MMU. |
| 1203 | However, using more entries will allow mapping more low memory. This |
| 1204 | can be useful in optimizing the layout of kernel virtual memory. |
| 1205 | |
| 1206 | Say N here unless you know what you are doing. |
| 1207 | |
| 1208 | config LOWMEM_CAM_NUM |
| 1209 | depends on PPC_85xx |
| 1210 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
| 1211 | default 3 if !STRICT_KERNEL_RWX |
| 1212 | default 9 if DATA_SHIFT >= 24 |
| 1213 | default 12 if DATA_SHIFT >= 22 |
| 1214 | default 15 |
| 1215 | |
| 1216 | config DYNAMIC_MEMSTART |
| 1217 | bool "Enable page aligned dynamic load address for kernel" |
| 1218 | depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x) |
| 1219 | select NONSTATIC_KERNEL |
| 1220 | help |
| 1221 | This option enables the kernel to be loaded at any page aligned |
| 1222 | physical address. The kernel creates a mapping from KERNELBASE to |
| 1223 | the address where the kernel is loaded. The page size here implies |
| 1224 | the TLB page size of the mapping for kernel on the particular platform. |
| 1225 | Please refer to the init code for finding the TLB page size. |
| 1226 | |
| 1227 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
| 1228 | kernel image, where the only restriction is the page aligned kernel |
| 1229 | load address. When this option is enabled, the compile time physical |
| 1230 | address CONFIG_PHYSICAL_START is ignored. |
| 1231 | |
| 1232 | This option is overridden by CONFIG_RELOCATABLE |
| 1233 | |
| 1234 | config PAGE_OFFSET_BOOL |
| 1235 | bool "Set custom page offset address" |
| 1236 | depends on ADVANCED_OPTIONS |
| 1237 | help |
| 1238 | This option allows you to set the kernel virtual address at which |
| 1239 | the kernel will map low memory. This can be useful in optimizing |
| 1240 | the virtual memory layout of the system. |
| 1241 | |
| 1242 | Say N here unless you know what you are doing. |
| 1243 | |
| 1244 | config PAGE_OFFSET |
| 1245 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
| 1246 | default "0xc0000000" |
| 1247 | |
| 1248 | config KERNEL_START_BOOL |
| 1249 | bool "Set custom kernel base address" |
| 1250 | depends on ADVANCED_OPTIONS |
| 1251 | help |
| 1252 | This option allows you to set the kernel virtual address at which |
| 1253 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
| 1254 | however there are times (like kdump) that one might not want them |
| 1255 | to be the same. |
| 1256 | |
| 1257 | Say N here unless you know what you are doing. |
| 1258 | |
| 1259 | config KERNEL_START |
| 1260 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
| 1261 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
| 1262 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
| 1263 | default "0xc0000000" |
| 1264 | |
| 1265 | config PHYSICAL_START_BOOL |
| 1266 | bool "Set physical address where the kernel is loaded" |
| 1267 | depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx |
| 1268 | help |
| 1269 | This gives the physical address where the kernel is loaded. |
| 1270 | |
| 1271 | Say N here unless you know what you are doing. |
| 1272 | |
| 1273 | config PHYSICAL_START |
| 1274 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
| 1275 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
| 1276 | default "0x00000000" |
| 1277 | |
| 1278 | config PHYSICAL_ALIGN |
| 1279 | hex |
| 1280 | default "0x04000000" if PPC_85xx |
| 1281 | help |
| 1282 | This value puts the alignment restrictions on physical address |
| 1283 | where kernel is loaded and run from. Kernel is compiled for an |
| 1284 | address which meets above alignment restriction. |
| 1285 | |
| 1286 | config TASK_SIZE_BOOL |
| 1287 | bool "Set custom user task size" |
| 1288 | depends on ADVANCED_OPTIONS |
| 1289 | help |
| 1290 | This option allows you to set the amount of virtual address space |
| 1291 | allocated to user tasks. This can be useful in optimizing the |
| 1292 | virtual memory layout of the system. |
| 1293 | |
| 1294 | Say N here unless you know what you are doing. |
| 1295 | |
| 1296 | config TASK_SIZE |
| 1297 | hex "Size of maximum user task space" if TASK_SIZE_BOOL |
| 1298 | default "0x80000000" if PPC_8xx |
| 1299 | default "0xc0000000" |
| 1300 | |
| 1301 | config MODULES_SIZE_BOOL |
| 1302 | bool "Set custom size for modules/execmem area" |
| 1303 | depends on EXECMEM && ADVANCED_OPTIONS |
| 1304 | help |
| 1305 | This option allows you to set the size of kernel virtual address |
| 1306 | space dedicated for modules/execmem. |
| 1307 | For the time being it is only for 8xx and book3s/32. Other |
| 1308 | platform share it with vmalloc space. |
| 1309 | |
| 1310 | Say N here unless you know what you are doing. |
| 1311 | |
| 1312 | config MODULES_SIZE |
| 1313 | int "Size of modules/execmem area (In Mbytes)" if MODULES_SIZE_BOOL |
| 1314 | range 1 256 if EXECMEM |
| 1315 | default 64 if EXECMEM && PPC_BOOK3S_32 |
| 1316 | default 32 if EXECMEM && PPC_8xx |
| 1317 | default 0 |
| 1318 | |
| 1319 | endmenu |
| 1320 | |
| 1321 | config PPC64_PROC_SYSTEMCFG |
| 1322 | def_bool y |
| 1323 | depends on PPC64 && PROC_FS |
| 1324 | help |
| 1325 | This option enables the presence of /proc/ppc64/systemcfg through |
| 1326 | which the systemcfg page can be accessed. |
| 1327 | This interface only exists for backwards-compatibility. |
| 1328 | |
| 1329 | if PPC64 |
| 1330 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
| 1331 | config PAGE_OFFSET |
| 1332 | hex |
| 1333 | default "0xc000000000000000" |
| 1334 | config KERNEL_START |
| 1335 | hex |
| 1336 | default "0xc000000000000000" |
| 1337 | config PHYSICAL_START |
| 1338 | hex |
| 1339 | default "0x00000000" |
| 1340 | endif |
| 1341 | |
| 1342 | config PPC_LIB_RHEAP |
| 1343 | bool |
| 1344 | |
| 1345 | source "arch/powerpc/kvm/Kconfig" |
| 1346 | |
| 1347 | source "kernel/livepatch/Kconfig" |