Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 2 | source "arch/powerpc/platforms/Kconfig.cputype" |
| 3 | |
| 4 | config PPC32 |
| 5 | bool |
| 6 | default y if !PPC64 |
| 7 | |
| 8 | config 32BIT |
| 9 | bool |
| 10 | default y if PPC32 |
| 11 | |
| 12 | config 64BIT |
| 13 | bool |
| 14 | default y if PPC64 |
| 15 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 16 | config MMU |
| 17 | bool |
| 18 | default y |
| 19 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 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) |
| 51 | default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
| 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 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 62 | config HAVE_SETUP_PER_CPU_AREA |
| 63 | def_bool PPC64 |
| 64 | |
| 65 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
| 66 | def_bool PPC64 |
| 67 | |
| 68 | config NR_IRQS |
| 69 | int "Number of virtual interrupt numbers" |
| 70 | range 32 32768 |
| 71 | default "512" |
| 72 | help |
| 73 | This defines the number of virtual interrupt numbers the kernel |
| 74 | can manage. Virtual interrupt numbers are what you see in |
| 75 | /proc/interrupts. If you configure your system to have too few, |
| 76 | drivers will fail to load or worse - handle with care. |
| 77 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 78 | config NMI_IPI |
| 79 | bool |
| 80 | depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
| 81 | default y |
| 82 | |
| 83 | config PPC_WATCHDOG |
| 84 | bool |
| 85 | depends on HARDLOCKUP_DETECTOR |
| 86 | depends on HAVE_HARDLOCKUP_DETECTOR_ARCH |
| 87 | default y |
| 88 | help |
| 89 | This is a placeholder when the powerpc hardlockup detector |
| 90 | watchdog is selected (arch/powerpc/kernel/watchdog.c). It is |
| 91 | seleted via the generic lockup detector menu which is why we |
| 92 | have no standalone config option for it here. |
| 93 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 94 | config STACKTRACE_SUPPORT |
| 95 | bool |
| 96 | default y |
| 97 | |
| 98 | config TRACE_IRQFLAGS_SUPPORT |
| 99 | bool |
| 100 | default y |
| 101 | |
| 102 | config LOCKDEP_SUPPORT |
| 103 | bool |
| 104 | default y |
| 105 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 106 | config GENERIC_LOCKBREAK |
| 107 | bool |
| 108 | default y |
| 109 | depends on SMP && PREEMPT |
| 110 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 111 | config GENERIC_HWEIGHT |
| 112 | bool |
| 113 | default y |
| 114 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 115 | config PPC |
| 116 | bool |
| 117 | default y |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 118 | # |
| 119 | # Please keep this list sorted alphabetically. |
| 120 | # |
| 121 | select ARCH_32BIT_OFF_T if PPC32 |
| 122 | select ARCH_HAS_DEBUG_VIRTUAL |
| 123 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
| 124 | select ARCH_HAS_ELF_RANDOMIZE |
| 125 | select ARCH_HAS_FORTIFY_SOURCE |
| 126 | select ARCH_HAS_GCOV_PROFILE_ALL |
| 127 | select ARCH_HAS_KCOV |
| 128 | select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
| 129 | select ARCH_HAS_MMIOWB if PPC64 |
| 130 | select ARCH_HAS_PHYS_TO_DMA |
| 131 | select ARCH_HAS_PMEM_API |
| 132 | select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 |
| 133 | select ARCH_HAS_PTE_SPECIAL |
| 134 | select ARCH_HAS_MEMBARRIER_CALLBACKS |
| 135 | select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
| 136 | select ARCH_HAS_STRICT_KERNEL_RWX if (PPC32 && !HIBERNATION) |
| 137 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
| 138 | select ARCH_HAS_UACCESS_FLUSHCACHE |
| 139 | select ARCH_HAS_UACCESS_MCSAFE if PPC64 |
| 140 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
| 141 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| 142 | select ARCH_KEEP_MEMBLOCK |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 143 | select ARCH_MIGHT_HAVE_PC_PARPORT |
| 144 | select ARCH_MIGHT_HAVE_PC_SERIO |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 145 | select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
| 146 | select ARCH_SUPPORTS_ATOMIC_RMW |
| 147 | select ARCH_USE_BUILTIN_BSWAP |
| 148 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
| 149 | select ARCH_WANT_IPC_PARSE_VERSION |
| 150 | select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
| 151 | select ARCH_WEAK_RELEASE_ACQUIRE |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 152 | select BINFMT_ELF |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 153 | select BUILDTIME_EXTABLE_SORT |
| 154 | select CLONE_BACKWARDS |
| 155 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
| 156 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
| 157 | select EDAC_ATOMIC_SCRUB |
| 158 | select EDAC_SUPPORT |
| 159 | select GENERIC_ATOMIC64 if PPC32 |
| 160 | select GENERIC_CLOCKEVENTS |
| 161 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
| 162 | select GENERIC_CMOS_UPDATE |
| 163 | select GENERIC_CPU_AUTOPROBE |
| 164 | select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
| 165 | select GENERIC_IRQ_SHOW |
| 166 | select GENERIC_IRQ_SHOW_LEVEL |
| 167 | select GENERIC_PCI_IOMAP if PCI |
| 168 | select GENERIC_SMP_IDLE_THREAD |
| 169 | select GENERIC_STRNCPY_FROM_USER |
| 170 | select GENERIC_STRNLEN_USER |
| 171 | select GENERIC_TIME_VSYSCALL |
| 172 | select HAVE_ARCH_AUDITSYSCALL |
| 173 | select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU |
| 174 | select HAVE_ARCH_JUMP_LABEL |
| 175 | select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 |
| 176 | select HAVE_ARCH_KGDB |
| 177 | select HAVE_ARCH_MMAP_RND_BITS |
| 178 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT |
| 179 | select HAVE_ARCH_NVRAM_OPS |
| 180 | select HAVE_ARCH_SECCOMP_FILTER |
| 181 | select HAVE_ARCH_TRACEHOOK |
| 182 | select HAVE_ASM_MODVERSIONS |
| 183 | select HAVE_C_RECORDMCOUNT |
| 184 | select HAVE_CBPF_JIT if !PPC64 |
| 185 | select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) |
| 186 | select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) |
| 187 | select HAVE_CONTEXT_TRACKING if PPC64 |
| 188 | select HAVE_COPY_THREAD_TLS |
| 189 | select HAVE_DEBUG_KMEMLEAK |
| 190 | select HAVE_DEBUG_STACKOVERFLOW |
| 191 | select HAVE_DYNAMIC_FTRACE |
| 192 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
| 193 | select HAVE_EBPF_JIT if PPC64 |
| 194 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) |
| 195 | select HAVE_FAST_GUP |
| 196 | select HAVE_FTRACE_MCOUNT_RECORD |
| 197 | select HAVE_FUNCTION_ERROR_INJECTION |
| 198 | select HAVE_FUNCTION_GRAPH_TRACER |
| 199 | select HAVE_FUNCTION_TRACER |
| 200 | select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
| 201 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
| 202 | select HAVE_IDE |
| 203 | select HAVE_IOREMAP_PROT |
| 204 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
| 205 | select HAVE_KERNEL_GZIP |
| 206 | select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
| 207 | select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
Googler | b48fa91 | 2023-03-17 12:40:29 +0530 | [diff] [blame^] | 208 | select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x || PPC_85xx |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 209 | select HAVE_KPROBES |
| 210 | select HAVE_KPROBES_ON_FTRACE |
| 211 | select HAVE_KRETPROBES |
| 212 | select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
| 213 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
| 214 | select HAVE_MEMBLOCK_NODE_MAP |
| 215 | select HAVE_MOD_ARCH_SPECIFIC |
| 216 | select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
Googler | b48fa91 | 2023-03-17 12:40:29 +0530 | [diff] [blame^] | 217 | select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 218 | select HAVE_OPROFILE |
| 219 | select HAVE_OPTPROBES if PPC64 |
| 220 | select HAVE_PERF_EVENTS |
| 221 | select HAVE_PERF_EVENTS_NMI if PPC64 |
| 222 | select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH |
| 223 | select HAVE_PERF_REGS |
| 224 | select HAVE_PERF_USER_STACK_DUMP |
| 225 | select HAVE_RCU_TABLE_FREE |
| 226 | select HAVE_MMU_GATHER_PAGE_SIZE |
| 227 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 228 | select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN |
| 229 | select HAVE_SYSCALL_TRACEPOINTS |
| 230 | select HAVE_VIRT_CPU_ACCOUNTING |
| 231 | select HAVE_IRQ_TIME_ACCOUNTING |
| 232 | select HAVE_RSEQ |
| 233 | select IOMMU_HELPER if PPC64 |
| 234 | select IRQ_DOMAIN |
| 235 | select IRQ_FORCED_THREADING |
| 236 | select MODULES_USE_ELF_RELA |
| 237 | select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
| 238 | select NEED_SG_DMA_LENGTH |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 239 | select OF |
| 240 | select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
| 241 | select OF_EARLY_FLATTREE |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 242 | select OLD_SIGACTION if PPC32 |
Googler | 9726be6 | 2022-12-14 05:53:31 +0000 | [diff] [blame] | 243 | select OLD_SIGSUSPEND |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 244 | select PCI_DOMAINS if PCI |
| 245 | select PCI_SYSCALL if PCI |
| 246 | select PPC_DAWR if PPC64 |
| 247 | select RTC_LIB |
| 248 | select SPARSE_IRQ |
| 249 | select SYSCTL_EXCEPTION_TRACE |
| 250 | select THREAD_INFO_IN_TASK |
| 251 | select VIRT_TO_BUS if !PPC64 |
| 252 | # |
| 253 | # Please keep this list sorted alphabetically. |
| 254 | # |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 255 | |
| 256 | config PPC_BARRIER_NOSPEC |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 257 | bool |
| 258 | default y |
| 259 | depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 260 | |
| 261 | config EARLY_PRINTK |
| 262 | bool |
| 263 | default y |
| 264 | |
| 265 | config PANIC_TIMEOUT |
| 266 | int |
| 267 | default 180 |
| 268 | |
| 269 | config COMPAT |
| 270 | bool |
| 271 | default y if PPC64 |
| 272 | select COMPAT_BINFMT_ELF |
| 273 | select ARCH_WANT_OLD_COMPAT_IPC |
| 274 | select COMPAT_OLD_SIGACTION |
| 275 | |
| 276 | config SYSVIPC_COMPAT |
| 277 | bool |
| 278 | depends on COMPAT && SYSVIPC |
| 279 | default y |
| 280 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 281 | config SCHED_OMIT_FRAME_POINTER |
| 282 | bool |
| 283 | default y |
| 284 | |
| 285 | config ARCH_MAY_HAVE_PC_FDC |
| 286 | bool |
| 287 | default PCI |
| 288 | |
| 289 | config PPC_UDBG_16550 |
| 290 | bool |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 291 | |
| 292 | config GENERIC_TBSYNC |
| 293 | bool |
| 294 | default y if PPC32 && SMP |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 295 | |
| 296 | config AUDIT_ARCH |
| 297 | bool |
| 298 | default y |
| 299 | |
| 300 | config GENERIC_BUG |
| 301 | bool |
| 302 | default y |
| 303 | depends on BUG |
| 304 | |
| 305 | config SYS_SUPPORTS_APM_EMULATION |
| 306 | default y if PMAC_APM_EMU |
| 307 | bool |
| 308 | |
| 309 | config EPAPR_BOOT |
| 310 | bool |
| 311 | help |
| 312 | Used to allow a board to specify it wants an ePAPR compliant wrapper. |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 313 | |
| 314 | config DEFAULT_UIMAGE |
| 315 | bool |
| 316 | help |
| 317 | Used to allow a board to specify it wants a uImage built by default |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 318 | |
| 319 | config ARCH_HIBERNATION_POSSIBLE |
| 320 | bool |
| 321 | default y |
| 322 | |
| 323 | config ARCH_SUSPEND_POSSIBLE |
| 324 | def_bool y |
| 325 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
| 326 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
| 327 | || 44x || 40x |
| 328 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 329 | config ARCH_SUSPEND_NONZERO_CPU |
| 330 | def_bool y |
| 331 | depends on PPC_POWERNV || PPC_PSERIES |
| 332 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 333 | config PPC_DCR_NATIVE |
| 334 | bool |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 335 | |
| 336 | config PPC_DCR_MMIO |
| 337 | bool |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 338 | |
| 339 | config PPC_DCR |
| 340 | bool |
| 341 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
| 342 | default y |
| 343 | |
| 344 | config PPC_OF_PLATFORM_PCI |
| 345 | bool |
| 346 | depends on PCI |
| 347 | depends on PPC64 # not supported on 32 bits yet |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 348 | |
| 349 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 350 | depends on PPC32 || PPC_BOOK3S_64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 351 | def_bool y |
| 352 | |
| 353 | config ARCH_SUPPORTS_UPROBES |
| 354 | def_bool y |
| 355 | |
| 356 | config PPC_ADV_DEBUG_REGS |
| 357 | bool |
| 358 | depends on 40x || BOOKE |
| 359 | default y |
| 360 | |
| 361 | config PPC_ADV_DEBUG_IACS |
| 362 | int |
| 363 | depends on PPC_ADV_DEBUG_REGS |
| 364 | default 4 if 44x |
| 365 | default 2 |
| 366 | |
| 367 | config PPC_ADV_DEBUG_DACS |
| 368 | int |
| 369 | depends on PPC_ADV_DEBUG_REGS |
| 370 | default 2 |
| 371 | |
| 372 | config PPC_ADV_DEBUG_DVCS |
| 373 | int |
| 374 | depends on PPC_ADV_DEBUG_REGS |
| 375 | default 2 if 44x |
| 376 | default 0 |
| 377 | |
| 378 | config PPC_ADV_DEBUG_DAC_RANGE |
| 379 | bool |
| 380 | depends on PPC_ADV_DEBUG_REGS && 44x |
| 381 | default y |
| 382 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 383 | config PPC_DAWR |
Googler | 9726be6 | 2022-12-14 05:53:31 +0000 | [diff] [blame] | 384 | bool |
Googler | 9726be6 | 2022-12-14 05:53:31 +0000 | [diff] [blame] | 385 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 386 | config ZONE_DMA |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 387 | bool |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 388 | default y if PPC_BOOK3E_64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 389 | |
| 390 | config PGTABLE_LEVELS |
| 391 | int |
| 392 | default 2 if !PPC64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 393 | default 4 |
| 394 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 395 | source "arch/powerpc/sysdev/Kconfig" |
| 396 | source "arch/powerpc/platforms/Kconfig" |
| 397 | |
| 398 | menu "Kernel options" |
| 399 | |
| 400 | config HIGHMEM |
| 401 | bool "High memory support" |
| 402 | depends on PPC32 |
| 403 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 404 | source "kernel/Kconfig.hz" |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 405 | |
| 406 | config HUGETLB_PAGE_SIZE_VARIABLE |
| 407 | bool |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 408 | depends on HUGETLB_PAGE && PPC_BOOK3S_64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 409 | default y |
| 410 | |
| 411 | config MATH_EMULATION |
| 412 | bool "Math emulation" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 413 | depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE |
| 414 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 415 | Some PowerPC chips designed for embedded applications do not have |
| 416 | a floating-point unit and therefore do not implement the |
| 417 | floating-point instructions in the PowerPC instruction set. If you |
| 418 | say Y here, the kernel will include code to emulate a floating-point |
| 419 | unit, which will allow programs that use floating-point |
| 420 | instructions to run. |
| 421 | |
| 422 | This is also useful to emulate missing (optional) instructions |
| 423 | such as fsqrt on cores that do have an FPU but do not implement |
| 424 | them (such as Freescale BookE). |
| 425 | |
| 426 | choice |
| 427 | prompt "Math emulation options" |
| 428 | default MATH_EMULATION_FULL |
| 429 | depends on MATH_EMULATION |
| 430 | |
| 431 | config MATH_EMULATION_FULL |
| 432 | bool "Emulate all the floating point instructions" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 433 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 434 | Select this option will enable the kernel to support to emulate |
| 435 | all the floating point instructions. If your SoC doesn't have |
| 436 | a FPU, you should select this. |
| 437 | |
| 438 | config MATH_EMULATION_HW_UNIMPLEMENTED |
| 439 | bool "Just emulate the FPU unimplemented instructions" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 440 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 441 | Select this if you know there does have a hardware FPU on your |
| 442 | SoC, but some floating point instructions are not implemented by that. |
| 443 | |
| 444 | endchoice |
| 445 | |
| 446 | config PPC_TRANSACTIONAL_MEM |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 447 | bool "Transactional Memory support for POWERPC" |
| 448 | depends on PPC_BOOK3S_64 |
| 449 | depends on SMP |
| 450 | select ALTIVEC |
| 451 | select VSX |
Googler | 38bda47 | 2022-08-19 10:07:08 -0700 | [diff] [blame] | 452 | help |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 453 | Support user-mode Transactional Memory on POWERPC. |
Googler | 38bda47 | 2022-08-19 10:07:08 -0700 | [diff] [blame] | 454 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 455 | config LD_HEAD_STUB_CATCH |
| 456 | bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT |
| 457 | depends on PPC64 |
| 458 | help |
| 459 | Very large kernels can cause linker branch stubs to be generated by |
| 460 | code in head_64.S, which moves the head text sections out of their |
| 461 | specified location. This option can work around the problem. |
| 462 | |
| 463 | If unsure, say "N". |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 464 | |
| 465 | config MPROFILE_KERNEL |
| 466 | depends on PPC64 && CPU_LITTLE_ENDIAN |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 467 | def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 468 | |
| 469 | config HOTPLUG_CPU |
| 470 | bool "Support for enabling/disabling CPUs" |
| 471 | depends on SMP && (PPC_PSERIES || \ |
| 472 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 473 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 474 | Say Y here to be able to disable and re-enable individual |
| 475 | CPUs at runtime on SMP machines. |
| 476 | |
| 477 | Say N if you are unsure. |
| 478 | |
| 479 | config ARCH_CPU_PROBE_RELEASE |
| 480 | def_bool y |
| 481 | depends on HOTPLUG_CPU |
| 482 | |
| 483 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 484 | def_bool y |
| 485 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 486 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 487 | def_bool y |
| 488 | |
| 489 | config PPC64_SUPPORTS_MEMORY_FAILURE |
| 490 | bool "Add support for memory hwpoison" |
| 491 | depends on PPC_BOOK3S_64 |
| 492 | default "y" if PPC_POWERNV |
| 493 | select ARCH_SUPPORTS_MEMORY_FAILURE |
| 494 | |
| 495 | config KEXEC |
| 496 | bool "kexec system call" |
| 497 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
| 498 | select KEXEC_CORE |
| 499 | help |
| 500 | kexec is a system call that implements the ability to shutdown your |
| 501 | current kernel, and to start another kernel. It is like a reboot |
| 502 | but it is independent of the system firmware. And like a reboot |
| 503 | you can start any kernel with it, not just Linux. |
| 504 | |
| 505 | The name comes from the similarity to the exec system call. |
| 506 | |
| 507 | It is an ongoing process to be certain the hardware in a machine |
| 508 | is properly shutdown, so do not be surprised if this code does not |
| 509 | initially work for you. As of this writing the exact hardware |
| 510 | interface is strongly in flux, so no good recommendation can be |
| 511 | made. |
| 512 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 513 | config KEXEC_FILE |
| 514 | bool "kexec file based system call" |
| 515 | select KEXEC_CORE |
| 516 | select HAVE_IMA_KEXEC |
| 517 | select BUILD_BIN2C |
| 518 | select KEXEC_ELF |
| 519 | depends on PPC64 |
| 520 | depends on CRYPTO=y |
| 521 | depends on CRYPTO_SHA256=y |
| 522 | help |
| 523 | This is a new version of the kexec system call. This call is |
| 524 | file based and takes in file descriptors as system call arguments |
| 525 | for kernel and initramfs as opposed to a list of segments as is the |
| 526 | case for the older kexec call. |
| 527 | |
| 528 | config ARCH_HAS_KEXEC_PURGATORY |
| 529 | def_bool KEXEC_FILE |
| 530 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 531 | config RELOCATABLE |
| 532 | bool "Build a relocatable kernel" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 533 | depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 534 | select NONSTATIC_KERNEL |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 535 | select MODULE_REL_CRCS if MODVERSIONS |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 536 | help |
| 537 | This builds a kernel image that is capable of running at the |
| 538 | location the kernel is loaded at. For ppc32, there is no any |
| 539 | alignment restrictions, and this feature is a superset of |
| 540 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use |
| 541 | 16k-aligned base address. The kernel is linked as a |
| 542 | position-independent executable (PIE) and contains dynamic relocations |
| 543 | which are processed early in the bootup process. |
| 544 | |
| 545 | One use is for the kexec on panic case where the recovery kernel |
| 546 | must live at a different physical address than the primary |
| 547 | kernel. |
| 548 | |
| 549 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 550 | it has been loaded at and the compile time physical addresses |
| 551 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
| 552 | setting can still be useful to bootwrappers that need to know the |
| 553 | load address of the kernel (eg. u-boot/mkimage). |
| 554 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 555 | config RELOCATABLE_TEST |
| 556 | bool "Test relocatable kernel" |
| 557 | depends on (PPC64 && RELOCATABLE) |
Googler | 0109c45 | 2022-10-13 17:50:39 +0800 | [diff] [blame] | 558 | help |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 559 | This runs the relocatable kernel at the address it was initially |
| 560 | loaded at, which tends to be non-zero and therefore test the |
| 561 | relocation code. |
| 562 | |
| 563 | config CRASH_DUMP |
| 564 | bool "Build a dump capture kernel" |
| 565 | depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
| 566 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
| 567 | help |
| 568 | Build a kernel suitable for use as a dump capture kernel. |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 569 | The same kernel binary can be used as production kernel and dump |
| 570 | capture kernel. |
| 571 | |
| 572 | config FA_DUMP |
| 573 | bool "Firmware-assisted dump" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 574 | depends on PPC64 && (PPC_RTAS || PPC_POWERNV) |
| 575 | select CRASH_CORE |
| 576 | select CRASH_DUMP |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 577 | help |
| 578 | A robust mechanism to get reliable kernel crash dump with |
| 579 | assistance from firmware. This approach does not use kexec, |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 580 | instead firmware assists in booting the capture kernel |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 581 | while preserving memory contents. Firmware-assisted dump |
| 582 | is meant to be a kdump replacement offering robustness and |
| 583 | speed not possible without system firmware assistance. |
| 584 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 585 | If unsure, say "y". Only special kernels like petitboot may |
| 586 | need to say "N" here. |
| 587 | |
| 588 | config PRESERVE_FA_DUMP |
| 589 | bool "Preserve Firmware-assisted dump" |
| 590 | depends on PPC64 && PPC_POWERNV && !FA_DUMP |
| 591 | help |
| 592 | On a kernel with FA_DUMP disabled, this option helps to preserve |
| 593 | crash data from a previously crash'ed kernel. Useful when the next |
| 594 | memory preserving kernel boot would process this crash data. |
| 595 | Petitboot kernel is the typical usecase for this option. |
| 596 | |
| 597 | config OPAL_CORE |
| 598 | bool "Export OPAL memory as /sys/firmware/opal/core" |
| 599 | depends on PPC64 && PPC_POWERNV |
| 600 | help |
| 601 | This option uses the MPIPL support in firmware to provide an |
| 602 | ELF core of OPAL memory after a crash. The ELF core is exported |
| 603 | as /sys/firmware/opal/core file which is helpful in debugging |
| 604 | OPAL crashes using GDB. |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 605 | |
| 606 | config IRQ_ALL_CPUS |
| 607 | bool "Distribute interrupts on all CPUs by default" |
| 608 | depends on SMP |
| 609 | help |
| 610 | This option gives the kernel permission to distribute IRQs across |
| 611 | multiple CPUs. Saying N here will route all IRQs to the first |
| 612 | CPU. Generally saying Y is safe, although some problems have been |
| 613 | reported with SMP Power Macintoshes with this option enabled. |
| 614 | |
| 615 | config NUMA |
| 616 | bool "NUMA support" |
| 617 | depends on PPC64 |
| 618 | default y if SMP && PPC_PSERIES |
| 619 | |
| 620 | config NODES_SHIFT |
| 621 | int |
| 622 | default "8" if PPC64 |
| 623 | default "4" |
| 624 | depends on NEED_MULTIPLE_NODES |
| 625 | |
| 626 | config USE_PERCPU_NUMA_NODE_ID |
| 627 | def_bool y |
| 628 | depends on NUMA |
| 629 | |
| 630 | config HAVE_MEMORYLESS_NODES |
| 631 | def_bool y |
| 632 | depends on NUMA |
| 633 | |
| 634 | config ARCH_SELECT_MEMORY_MODEL |
| 635 | def_bool y |
| 636 | depends on PPC64 |
| 637 | |
| 638 | config ARCH_FLATMEM_ENABLE |
| 639 | def_bool y |
| 640 | depends on (PPC64 && !NUMA) || PPC32 |
| 641 | |
| 642 | config ARCH_SPARSEMEM_ENABLE |
| 643 | def_bool y |
| 644 | depends on PPC64 |
| 645 | select SPARSEMEM_VMEMMAP_ENABLE |
| 646 | |
| 647 | config ARCH_SPARSEMEM_DEFAULT |
| 648 | def_bool y |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 649 | depends on PPC_BOOK3S_64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 650 | |
| 651 | config SYS_SUPPORTS_HUGETLBFS |
| 652 | bool |
| 653 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 654 | config ILLEGAL_POINTER_VALUE |
| 655 | hex |
| 656 | # This is roughly half way between the top of user space and the bottom |
| 657 | # of kernel space, which seems about as good as we can get. |
| 658 | default 0x5deadbeef0000000 if PPC64 |
| 659 | default 0 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 660 | |
| 661 | config ARCH_MEMORY_PROBE |
| 662 | def_bool y |
| 663 | depends on MEMORY_HOTPLUG |
| 664 | |
| 665 | # Some NUMA nodes have memory ranges that span |
| 666 | # other nodes. Even though a pfn is valid and |
| 667 | # between a node's start and end pfns, it may not |
| 668 | # reside on that node. See memmap_init_zone() |
| 669 | # for details. |
| 670 | config NODES_SPAN_OTHER_NODES |
| 671 | def_bool y |
| 672 | depends on NEED_MULTIPLE_NODES |
| 673 | |
| 674 | config STDBINUTILS |
| 675 | bool "Using standard binutils settings" |
| 676 | depends on 44x |
| 677 | default y |
| 678 | help |
| 679 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. |
| 680 | Note, that kernel will be able to run only those applications, |
| 681 | which had been compiled using binutils later than 2.17.50.0.3 with |
| 682 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using |
| 683 | the older binutils, you can patch them with a trivial patch, which |
| 684 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. |
| 685 | |
| 686 | choice |
| 687 | prompt "Page size" |
| 688 | default PPC_4K_PAGES |
| 689 | help |
| 690 | Select the kernel logical page size. Increasing the page size |
| 691 | will reduce software overhead at each page boundary, allow |
| 692 | hardware prefetch mechanisms to be more effective, and allow |
| 693 | larger dma transfers increasing IO efficiency and reducing |
| 694 | overhead. However the utilization of memory will increase. |
| 695 | For example, each cached file will using a multiple of the |
| 696 | page size to hold its contents and the difference between the |
| 697 | end of file and the end of page is wasted. |
| 698 | |
| 699 | Some dedicated systems, such as software raid serving with |
| 700 | accelerated calculations, have shown significant increases. |
| 701 | |
| 702 | If you configure a 64 bit kernel for 64k pages but the |
| 703 | processor does not support them, then the kernel will simulate |
| 704 | them with 4k pages, loading them on demand, but with the |
| 705 | reduced software overhead and larger internal fragmentation. |
| 706 | For the 32 bit kernel, a large page option will not be offered |
| 707 | unless it is supported by the configured processor. |
| 708 | |
| 709 | If unsure, choose 4K_PAGES. |
| 710 | |
| 711 | config PPC_4K_PAGES |
| 712 | bool "4k page size" |
| 713 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 714 | |
| 715 | config PPC_16K_PAGES |
| 716 | bool "16k page size" |
| 717 | depends on 44x || PPC_8xx |
| 718 | |
| 719 | config PPC_64K_PAGES |
| 720 | bool "64k page size" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 721 | depends on 44x || PPC_BOOK3S_64 |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 722 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 723 | |
| 724 | config PPC_256K_PAGES |
| 725 | bool "256k page size" |
Googler | b48fa91 | 2023-03-17 12:40:29 +0530 | [diff] [blame^] | 726 | depends on 44x && !STDBINUTILS |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 727 | help |
| 728 | Make the page size 256k. |
| 729 | |
| 730 | As the ELF standard only requires alignment to support page |
| 731 | sizes up to 64k, you will need to compile all of your user |
| 732 | space applications with a non-standard binutils settings |
| 733 | (see the STDBINUTILS description for details). |
| 734 | |
| 735 | Say N unless you know what you are doing. |
| 736 | |
| 737 | endchoice |
| 738 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 739 | config PPC_PAGE_SHIFT |
| 740 | int |
| 741 | default 18 if PPC_256K_PAGES |
| 742 | default 16 if PPC_64K_PAGES |
| 743 | default 14 if PPC_16K_PAGES |
| 744 | default 12 |
| 745 | |
| 746 | config THREAD_SHIFT |
| 747 | int "Thread shift" if EXPERT |
| 748 | range 13 15 |
| 749 | default "15" if PPC_256K_PAGES |
| 750 | default "14" if PPC64 |
| 751 | default "14" if KASAN |
| 752 | default "13" |
| 753 | help |
| 754 | Used to define the stack size. The default is almost always what you |
| 755 | want. Only change this if you know what you are doing. |
| 756 | |
| 757 | config ETEXT_SHIFT_BOOL |
| 758 | bool "Set custom etext alignment" if STRICT_KERNEL_RWX && \ |
| 759 | (PPC_BOOK3S_32 || PPC_8xx) |
| 760 | depends on ADVANCED_OPTIONS |
| 761 | help |
| 762 | This option allows you to set the kernel end of text alignment. When |
| 763 | RAM is mapped by blocks, the alignment needs to fit the size and |
| 764 | number of possible blocks. The default should be OK for most configs. |
| 765 | |
| 766 | Say N here unless you know what you are doing. |
| 767 | |
| 768 | config ETEXT_SHIFT |
| 769 | int "_etext shift" if ETEXT_SHIFT_BOOL |
| 770 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
| 771 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
| 772 | default 17 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
| 773 | default 19 if STRICT_KERNEL_RWX && PPC_8xx |
| 774 | default PPC_PAGE_SHIFT |
| 775 | help |
| 776 | On Book3S 32 (603+), IBATs are used to map kernel text. |
| 777 | Smaller is the alignment, greater is the number of necessary IBATs. |
| 778 | |
| 779 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
| 780 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used |
| 781 | in that case. |
| 782 | |
| 783 | config DATA_SHIFT_BOOL |
| 784 | bool "Set custom data alignment" if STRICT_KERNEL_RWX && \ |
| 785 | (PPC_BOOK3S_32 || PPC_8xx) |
| 786 | depends on ADVANCED_OPTIONS |
| 787 | help |
| 788 | This option allows you to set the kernel data alignment. When |
| 789 | RAM is mapped by blocks, the alignment needs to fit the size and |
| 790 | number of possible blocks. The default should be OK for most configs. |
| 791 | |
| 792 | Say N here unless you know what you are doing. |
| 793 | |
| 794 | config DATA_SHIFT |
| 795 | int "Data shift" if DATA_SHIFT_BOOL |
| 796 | default 24 if STRICT_KERNEL_RWX && PPC64 |
| 797 | range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
| 798 | range 19 23 if STRICT_KERNEL_RWX && PPC_8xx |
| 799 | default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
| 800 | default 23 if STRICT_KERNEL_RWX && PPC_8xx |
| 801 | default PPC_PAGE_SHIFT |
| 802 | help |
| 803 | On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. |
| 804 | Smaller is the alignment, greater is the number of necessary DBATs. |
| 805 | |
| 806 | On 8xx, large pages (512kb or 8M) are used to map kernel linear |
| 807 | memory. Aligning to 8M reduces TLB misses as only 8M pages are used |
| 808 | in that case. |
| 809 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 810 | config FORCE_MAX_ZONEORDER |
| 811 | int "Maximum zone order" |
| 812 | range 8 9 if PPC64 && PPC_64K_PAGES |
| 813 | default "9" if PPC64 && PPC_64K_PAGES |
| 814 | range 13 13 if PPC64 && !PPC_64K_PAGES |
| 815 | default "13" if PPC64 && !PPC_64K_PAGES |
| 816 | range 9 64 if PPC32 && PPC_16K_PAGES |
| 817 | default "9" if PPC32 && PPC_16K_PAGES |
| 818 | range 7 64 if PPC32 && PPC_64K_PAGES |
| 819 | default "7" if PPC32 && PPC_64K_PAGES |
| 820 | range 5 64 if PPC32 && PPC_256K_PAGES |
| 821 | default "5" if PPC32 && PPC_256K_PAGES |
| 822 | range 11 64 |
| 823 | default "11" |
| 824 | help |
| 825 | The kernel memory allocator divides physically contiguous memory |
| 826 | blocks into "zones", where each zone is a power of two number of |
| 827 | pages. This option selects the largest power of two that the kernel |
| 828 | keeps in the memory allocator. If you need to allocate very large |
| 829 | blocks of physically contiguous memory, then you may need to |
| 830 | increase this value. |
| 831 | |
| 832 | This config option is actually maximum order plus one. For example, |
| 833 | a value of 11 means that the largest free memory block is 2^10 pages. |
| 834 | |
| 835 | The page size is not necessarily 4KB. For example, on 64-bit |
| 836 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
| 837 | this in mind when choosing a value for this option. |
| 838 | |
| 839 | config PPC_SUBPAGE_PROT |
| 840 | bool "Support setting protections for 4k subpages" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 841 | depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 842 | help |
| 843 | This option adds support for a system call to allow user programs |
| 844 | to set access permissions (read/write, readonly, or no access) |
| 845 | on the 4k subpages of each 64k page. |
| 846 | |
| 847 | config PPC_COPRO_BASE |
| 848 | bool |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 849 | |
| 850 | config SCHED_SMT |
| 851 | bool "SMT (Hyperthreading) scheduler support" |
| 852 | depends on PPC64 && SMP |
| 853 | help |
| 854 | SMT scheduler support improves the CPU scheduler's decision making |
| 855 | when dealing with POWER5 cpus at a cost of slightly increased |
| 856 | overhead in some places. If unsure say N here. |
| 857 | |
| 858 | config PPC_DENORMALISATION |
| 859 | bool "PowerPC denormalisation exception handling" |
| 860 | depends on PPC_BOOK3S_64 |
| 861 | default "y" if PPC_POWERNV |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 862 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 863 | Add support for handling denormalisation of single precision |
| 864 | values. Useful for bare metal only. If unsure say Y here. |
| 865 | |
| 866 | config CMDLINE_BOOL |
| 867 | bool "Default bootloader kernel arguments" |
| 868 | |
| 869 | config CMDLINE |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 870 | string "Initial kernel command string" if CMDLINE_BOOL |
| 871 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL |
| 872 | default "" |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 873 | help |
| 874 | On some platforms, there is currently no way for the boot loader to |
| 875 | pass arguments to the kernel. For these platforms, you can supply |
| 876 | some command-line options at build time by entering them here. In |
| 877 | most cases you will need to specify the root device here. |
| 878 | |
| 879 | config CMDLINE_FORCE |
| 880 | bool "Always use the default kernel command string" |
| 881 | depends on CMDLINE_BOOL |
| 882 | help |
| 883 | Always use the default kernel command string, even if the boot |
| 884 | loader passes other arguments to the kernel. |
| 885 | This is useful if you cannot or don't want to change the |
| 886 | command-line options your boot loader passes to the kernel. |
| 887 | |
| 888 | config EXTRA_TARGETS |
| 889 | string "Additional default image types" |
| 890 | help |
| 891 | List additional targets to be built by the bootwrapper here (separated |
| 892 | by spaces). This is useful for targets that depend of device tree |
| 893 | files in the .dts directory. |
| 894 | |
| 895 | Targets in this list will be build as part of the default build |
| 896 | target, or when the user does a 'make zImage' or a |
| 897 | 'make zImage.initrd'. |
| 898 | |
| 899 | If unsure, leave blank |
| 900 | |
| 901 | config ARCH_WANTS_FREEZER_CONTROL |
| 902 | def_bool y |
| 903 | depends on ADB_PMU |
| 904 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 905 | source "kernel/power/Kconfig" |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 906 | |
| 907 | config SECCOMP |
| 908 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 909 | depends on PROC_FS |
| 910 | default y |
| 911 | help |
| 912 | This kernel feature is useful for number crunching applications |
| 913 | that may need to compute untrusted bytecode during their |
| 914 | execution. By using pipes or other transports made available to |
| 915 | the process as file descriptors supporting the read/write |
| 916 | syscalls, it's possible to isolate those applications in |
| 917 | their own address space using seccomp. Once seccomp is |
| 918 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 919 | and the task is only allowed to execute a few safe syscalls |
| 920 | defined by each seccomp mode. |
| 921 | |
| 922 | If unsure, say Y. Only embedded should say N here. |
| 923 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 924 | config PPC_MEM_KEYS |
| 925 | prompt "PowerPC Memory Protection Keys" |
| 926 | def_bool y |
| 927 | depends on PPC_BOOK3S_64 |
| 928 | select ARCH_USES_HIGH_VMA_FLAGS |
| 929 | select ARCH_HAS_PKEYS |
| 930 | help |
| 931 | Memory Protection Keys provides a mechanism for enforcing |
| 932 | page-based protections, but without requiring modification of the |
| 933 | page tables when an application changes protection domains. |
| 934 | |
| 935 | For details, see Documentation/core-api/protection-keys.rst |
| 936 | |
| 937 | If unsure, say y. |
| 938 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 939 | endmenu |
| 940 | |
| 941 | config ISA_DMA_API |
| 942 | bool |
| 943 | default PCI |
| 944 | |
| 945 | menu "Bus options" |
| 946 | |
| 947 | config ISA |
| 948 | bool "Support for ISA-bus hardware" |
| 949 | depends on PPC_CHRP |
| 950 | select PPC_I8259 |
| 951 | help |
| 952 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 953 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 954 | inside your box. If you have an Apple machine, say N here; if you |
| 955 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
| 956 | embedded board, consult your board documentation. |
| 957 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 958 | config GENERIC_ISA_DMA |
| 959 | bool |
| 960 | depends on ISA_DMA_API |
| 961 | default y |
| 962 | |
| 963 | config PPC_INDIRECT_PCI |
| 964 | bool |
| 965 | depends on PCI |
| 966 | default y if 40x || 44x |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 967 | |
| 968 | config SBUS |
| 969 | bool |
| 970 | |
| 971 | config FSL_SOC |
| 972 | bool |
| 973 | |
| 974 | config FSL_PCI |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 975 | bool |
| 976 | select ARCH_HAS_DMA_SET_MASK |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 977 | select PPC_INDIRECT_PCI |
| 978 | select PCI_QUIRKS |
| 979 | |
| 980 | config FSL_PMC |
| 981 | bool |
| 982 | default y |
| 983 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
| 984 | help |
| 985 | Freescale MPC85xx/MPC86xx power management controller support |
| 986 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
| 987 | |
| 988 | config PPC4xx_CPM |
| 989 | bool |
| 990 | default y |
| 991 | depends on SUSPEND && (44x || 40x) |
| 992 | help |
| 993 | PPC4xx Clock Power Management (CPM) support (suspend/resume). |
| 994 | It also enables support for two different idle states (idle-wait |
| 995 | and idle-doze). |
| 996 | |
| 997 | config 4xx_SOC |
| 998 | bool |
| 999 | |
| 1000 | config FSL_LBC |
| 1001 | bool "Freescale Local Bus support" |
| 1002 | help |
| 1003 | Enables reporting of errors from the Freescale local bus |
| 1004 | controller. Also contains some common code used by |
| 1005 | drivers for specific local bus peripherals. |
| 1006 | |
| 1007 | config FSL_GTM |
| 1008 | bool |
| 1009 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
| 1010 | help |
| 1011 | Freescale General-purpose Timers support |
| 1012 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1013 | config PCI_8260 |
| 1014 | bool |
| 1015 | depends on PCI && 8260 |
| 1016 | select PPC_INDIRECT_PCI |
| 1017 | default y |
| 1018 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1019 | config FSL_RIO |
| 1020 | bool "Freescale Embedded SRIO Controller support" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1021 | depends on RAPIDIO = y && HAVE_RAPIDIO |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1022 | default "n" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1023 | help |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1024 | Include support for RapidIO controller on Freescale embedded |
| 1025 | processors (MPC8548, MPC8641, etc). |
| 1026 | |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1027 | config PPC_RTAS_FILTER |
| 1028 | bool "Enable filtering of RTAS syscalls" |
| 1029 | default y |
| 1030 | depends on PPC_RTAS |
| 1031 | help |
| 1032 | The RTAS syscall API has security issues that could be used to |
| 1033 | compromise system integrity. This option enforces restrictions on the |
| 1034 | RTAS calls and arguments passed by userspace programs to mitigate |
| 1035 | these issues. |
| 1036 | |
| 1037 | Say Y unless you know what you are doing and the filter is causing |
| 1038 | problems for you. |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1039 | |
| 1040 | endmenu |
| 1041 | |
| 1042 | config NONSTATIC_KERNEL |
| 1043 | bool |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1044 | |
| 1045 | menu "Advanced setup" |
| 1046 | depends on PPC32 |
| 1047 | |
| 1048 | config ADVANCED_OPTIONS |
| 1049 | bool "Prompt for advanced kernel configuration options" |
| 1050 | help |
| 1051 | This option will enable prompting for a variety of advanced kernel |
| 1052 | configuration options. These options can cause the kernel to not |
| 1053 | work if they are set incorrectly, but can be used to optimize certain |
| 1054 | aspects of kernel memory management. |
| 1055 | |
| 1056 | Unless you know what you are doing, say N here. |
| 1057 | |
| 1058 | comment "Default settings for advanced configuration options are used" |
| 1059 | depends on !ADVANCED_OPTIONS |
| 1060 | |
| 1061 | config LOWMEM_SIZE_BOOL |
| 1062 | bool "Set maximum low memory" |
| 1063 | depends on ADVANCED_OPTIONS |
| 1064 | help |
| 1065 | This option allows you to set the maximum amount of memory which |
| 1066 | will be used as "low memory", that is, memory which the kernel can |
| 1067 | access directly, without having to set up a kernel virtual mapping. |
| 1068 | This can be useful in optimizing the layout of kernel virtual |
| 1069 | memory. |
| 1070 | |
| 1071 | Say N here unless you know what you are doing. |
| 1072 | |
| 1073 | config LOWMEM_SIZE |
| 1074 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
| 1075 | default "0x30000000" |
| 1076 | |
| 1077 | config LOWMEM_CAM_NUM_BOOL |
| 1078 | bool "Set number of CAMs to use to map low memory" |
| 1079 | depends on ADVANCED_OPTIONS && FSL_BOOKE |
| 1080 | help |
| 1081 | This option allows you to set the maximum number of CAM slots that |
| 1082 | will be used to map low memory. There are a limited number of slots |
| 1083 | available and even more limited number that will fit in the L1 MMU. |
| 1084 | However, using more entries will allow mapping more low memory. This |
| 1085 | can be useful in optimizing the layout of kernel virtual memory. |
| 1086 | |
| 1087 | Say N here unless you know what you are doing. |
| 1088 | |
| 1089 | config LOWMEM_CAM_NUM |
| 1090 | depends on FSL_BOOKE |
| 1091 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
| 1092 | default 3 |
| 1093 | |
| 1094 | config DYNAMIC_MEMSTART |
| 1095 | bool "Enable page aligned dynamic load address for kernel" |
| 1096 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) |
| 1097 | select NONSTATIC_KERNEL |
| 1098 | help |
| 1099 | This option enables the kernel to be loaded at any page aligned |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1100 | physical address. The kernel creates a mapping from KERNELBASE to |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1101 | the address where the kernel is loaded. The page size here implies |
| 1102 | the TLB page size of the mapping for kernel on the particular platform. |
| 1103 | Please refer to the init code for finding the TLB page size. |
| 1104 | |
| 1105 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
| 1106 | kernel image, where the only restriction is the page aligned kernel |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1107 | load address. When this option is enabled, the compile time physical |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1108 | address CONFIG_PHYSICAL_START is ignored. |
| 1109 | |
| 1110 | This option is overridden by CONFIG_RELOCATABLE |
| 1111 | |
| 1112 | config PAGE_OFFSET_BOOL |
| 1113 | bool "Set custom page offset address" |
| 1114 | depends on ADVANCED_OPTIONS |
| 1115 | help |
| 1116 | This option allows you to set the kernel virtual address at which |
| 1117 | the kernel will map low memory. This can be useful in optimizing |
| 1118 | the virtual memory layout of the system. |
| 1119 | |
| 1120 | Say N here unless you know what you are doing. |
| 1121 | |
| 1122 | config PAGE_OFFSET |
| 1123 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
| 1124 | default "0xc0000000" |
| 1125 | |
| 1126 | config KERNEL_START_BOOL |
| 1127 | bool "Set custom kernel base address" |
| 1128 | depends on ADVANCED_OPTIONS |
| 1129 | help |
| 1130 | This option allows you to set the kernel virtual address at which |
| 1131 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
| 1132 | however there are times (like kdump) that one might not want them |
| 1133 | to be the same. |
| 1134 | |
| 1135 | Say N here unless you know what you are doing. |
| 1136 | |
| 1137 | config KERNEL_START |
| 1138 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
| 1139 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
| 1140 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
| 1141 | default "0xc0000000" |
| 1142 | |
| 1143 | config PHYSICAL_START_BOOL |
| 1144 | bool "Set physical address where the kernel is loaded" |
| 1145 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
| 1146 | help |
| 1147 | This gives the physical address where the kernel is loaded. |
| 1148 | |
| 1149 | Say N here unless you know what you are doing. |
| 1150 | |
| 1151 | config PHYSICAL_START |
| 1152 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1153 | default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1154 | default "0x00000000" |
| 1155 | |
| 1156 | config PHYSICAL_ALIGN |
| 1157 | hex |
| 1158 | default "0x04000000" if FSL_BOOKE |
| 1159 | help |
| 1160 | This value puts the alignment restrictions on physical address |
| 1161 | where kernel is loaded and run from. Kernel is compiled for an |
| 1162 | address which meets above alignment restriction. |
| 1163 | |
| 1164 | config TASK_SIZE_BOOL |
| 1165 | bool "Set custom user task size" |
| 1166 | depends on ADVANCED_OPTIONS |
| 1167 | help |
| 1168 | This option allows you to set the amount of virtual address space |
| 1169 | allocated to user tasks. This can be useful in optimizing the |
| 1170 | virtual memory layout of the system. |
| 1171 | |
| 1172 | Say N here unless you know what you are doing. |
| 1173 | |
| 1174 | config TASK_SIZE |
| 1175 | hex "Size of user task space" if TASK_SIZE_BOOL |
| 1176 | default "0x80000000" if PPC_8xx |
| 1177 | default "0xc0000000" |
| 1178 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1179 | config PIN_TLB |
| 1180 | bool "Pinned Kernel TLBs (860 ONLY)" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1181 | depends on ADVANCED_OPTIONS && PPC_8xx && \ |
| 1182 | !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX |
| 1183 | |
| 1184 | config PIN_TLB_DATA |
| 1185 | bool "Pinned TLB for DATA" |
| 1186 | depends on PIN_TLB |
| 1187 | default y |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1188 | |
| 1189 | config PIN_TLB_IMMR |
| 1190 | bool "Pinned TLB for IMMR" |
Googler | 9398cc3 | 2022-12-02 17:21:52 +0800 | [diff] [blame] | 1191 | depends on PIN_TLB || PPC_EARLY_DEBUG_CPM |
| 1192 | default y |
| 1193 | |
| 1194 | config PIN_TLB_TEXT |
| 1195 | bool "Pinned TLB for TEXT" |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1196 | depends on PIN_TLB |
| 1197 | default y |
| 1198 | endmenu |
| 1199 | |
| 1200 | if PPC64 |
| 1201 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
| 1202 | config PAGE_OFFSET |
| 1203 | hex |
| 1204 | default "0xc000000000000000" |
| 1205 | config KERNEL_START |
| 1206 | hex |
| 1207 | default "0xc000000000000000" |
| 1208 | config PHYSICAL_START |
| 1209 | hex |
| 1210 | default "0x00000000" |
| 1211 | endif |
| 1212 | |
| 1213 | config ARCH_RANDOM |
| 1214 | def_bool n |
| 1215 | |
Googler | af606d2 | 2022-10-26 21:40:12 -0700 | [diff] [blame] | 1216 | config PPC_LIB_RHEAP |
| 1217 | bool |
| 1218 | |
| 1219 | source "arch/powerpc/kvm/Kconfig" |
| 1220 | |
| 1221 | source "kernel/livepatch/Kconfig" |