| 1 | source "arch/powerpc/platforms/Kconfig.cputype" |
| 2 | |
| 3 | config PPC32 |
| 4 | bool |
| 5 | default y if !PPC64 |
| 6 | |
| 7 | config 32BIT |
| 8 | bool |
| 9 | default y if PPC32 |
| 10 | |
| 11 | config 64BIT |
| 12 | bool |
| 13 | default y if PPC64 |
| 14 | |
| 15 | config WORD_SIZE |
| 16 | int |
| 17 | default 64 if PPC64 |
| 18 | default 32 if !PPC64 |
| 19 | |
| 20 | config ARCH_PHYS_ADDR_T_64BIT |
| 21 | def_bool PPC64 || PHYS_64BIT |
| 22 | |
| 23 | config ARCH_DMA_ADDR_T_64BIT |
| 24 | def_bool ARCH_PHYS_ADDR_T_64BIT |
| 25 | |
| 26 | config MMU |
| 27 | bool |
| 28 | default y |
| 29 | |
| 30 | config HAVE_SETUP_PER_CPU_AREA |
| 31 | def_bool PPC64 |
| 32 | |
| 33 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
| 34 | def_bool PPC64 |
| 35 | |
| 36 | config NR_IRQS |
| 37 | int "Number of virtual interrupt numbers" |
| 38 | range 32 32768 |
| 39 | default "512" |
| 40 | help |
| 41 | This defines the number of virtual interrupt numbers the kernel |
| 42 | can manage. Virtual interrupt numbers are what you see in |
| 43 | /proc/interrupts. If you configure your system to have too few, |
| 44 | drivers will fail to load or worse - handle with care. |
| 45 | |
| 46 | config STACKTRACE_SUPPORT |
| 47 | bool |
| 48 | default y |
| 49 | |
| 50 | config TRACE_IRQFLAGS_SUPPORT |
| 51 | bool |
| 52 | default y |
| 53 | |
| 54 | config LOCKDEP_SUPPORT |
| 55 | bool |
| 56 | default y |
| 57 | |
| 58 | config RWSEM_GENERIC_SPINLOCK |
| 59 | bool |
| 60 | |
| 61 | config RWSEM_XCHGADD_ALGORITHM |
| 62 | bool |
| 63 | default y |
| 64 | |
| 65 | config GENERIC_LOCKBREAK |
| 66 | bool |
| 67 | default y |
| 68 | depends on SMP && PREEMPT |
| 69 | |
| 70 | config ARCH_HAS_ILOG2_U32 |
| 71 | bool |
| 72 | default y |
| 73 | |
| 74 | config ARCH_HAS_ILOG2_U64 |
| 75 | bool |
| 76 | default y if 64BIT |
| 77 | |
| 78 | config GENERIC_HWEIGHT |
| 79 | bool |
| 80 | default y |
| 81 | |
| 82 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
| 83 | bool |
| 84 | |
| 85 | config PPC |
| 86 | bool |
| 87 | default y |
| 88 | select ARCH_MIGHT_HAVE_PC_PARPORT |
| 89 | select ARCH_MIGHT_HAVE_PC_SERIO |
| 90 | select BINFMT_ELF |
| 91 | select ARCH_HAS_ELF_RANDOMIZE |
| 92 | select OF |
| 93 | select OF_EARLY_FLATTREE |
| 94 | select OF_RESERVED_MEM |
| 95 | select HAVE_FTRACE_MCOUNT_RECORD |
| 96 | select HAVE_DYNAMIC_FTRACE |
| 97 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
| 98 | select HAVE_FUNCTION_TRACER |
| 99 | select HAVE_FUNCTION_GRAPH_TRACER |
| 100 | select SYSCTL_EXCEPTION_TRACE |
| 101 | select VIRT_TO_BUS if !PPC64 |
| 102 | select HAVE_IDE |
| 103 | select HAVE_IOREMAP_PROT |
| 104 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN |
| 105 | select HAVE_KPROBES |
| 106 | select HAVE_ARCH_KGDB |
| 107 | select HAVE_KRETPROBES |
| 108 | select HAVE_ARCH_TRACEHOOK |
| 109 | select HAVE_MEMBLOCK |
| 110 | select HAVE_MEMBLOCK_NODE_MAP |
| 111 | select HAVE_DMA_API_DEBUG |
| 112 | select HAVE_OPROFILE |
| 113 | select HAVE_DEBUG_KMEMLEAK |
| 114 | select ARCH_HAS_SG_CHAIN |
| 115 | select GENERIC_ATOMIC64 if PPC32 |
| 116 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
| 117 | select HAVE_PERF_EVENTS |
| 118 | select HAVE_PERF_REGS |
| 119 | select HAVE_PERF_USER_STACK_DUMP |
| 120 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 121 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 |
| 122 | select HAVE_RSEQ |
| 123 | select ARCH_WANT_IPC_PARSE_VERSION |
| 124 | select SPARSE_IRQ |
| 125 | select IRQ_DOMAIN |
| 126 | select GENERIC_IRQ_SHOW |
| 127 | select GENERIC_IRQ_SHOW_LEVEL |
| 128 | select IRQ_FORCED_THREADING |
| 129 | select HAVE_RCU_TABLE_FREE if SMP |
| 130 | select HAVE_SYSCALL_TRACEPOINTS |
| 131 | select HAVE_CBPF_JIT if !PPC64 |
| 132 | select HAVE_EBPF_JIT if PPC64 |
| 133 | select HAVE_ARCH_JUMP_LABEL |
| 134 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| 135 | select ARCH_HAS_GCOV_PROFILE_ALL |
| 136 | select GENERIC_SMP_IDLE_THREAD |
| 137 | select GENERIC_CMOS_UPDATE |
| 138 | select GENERIC_TIME_VSYSCALL_OLD |
| 139 | select GENERIC_CLOCKEVENTS |
| 140 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
| 141 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
| 142 | select GENERIC_STRNCPY_FROM_USER |
| 143 | select GENERIC_STRNLEN_USER |
| 144 | select HAVE_MOD_ARCH_SPECIFIC |
| 145 | select MODULES_USE_ELF_RELA |
| 146 | select CLONE_BACKWARDS |
| 147 | select ARCH_USE_BUILTIN_BSWAP |
| 148 | select OLD_SIGSUSPEND |
| 149 | select OLD_SIGACTION if PPC32 |
| 150 | select HAVE_DEBUG_STACKOVERFLOW |
| 151 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
| 152 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
| 153 | select HAVE_ARCH_AUDITSYSCALL |
| 154 | select ARCH_SUPPORTS_ATOMIC_RMW |
| 155 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
| 156 | select NO_BOOTMEM |
| 157 | select HAVE_GENERIC_RCU_GUP |
| 158 | select HAVE_PERF_EVENTS_NMI if PPC64 |
| 159 | select HAVE_NMI if PERF_EVENTS |
| 160 | select EDAC_SUPPORT |
| 161 | select EDAC_ATOMIC_SCRUB |
| 162 | select ARCH_HAS_DMA_SET_COHERENT_MASK |
| 163 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
| 164 | select HAVE_ARCH_SECCOMP_FILTER |
| 165 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
| 166 | select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT |
| 167 | select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
| 168 | select GENERIC_CPU_AUTOPROBE |
| 169 | select HAVE_VIRT_CPU_ACCOUNTING |
| 170 | select HAVE_ARCH_HARDENED_USERCOPY |
| 171 | |
| 172 | config GENERIC_CSUM |
| 173 | def_bool CPU_LITTLE_ENDIAN |
| 174 | |
| 175 | config EARLY_PRINTK |
| 176 | bool |
| 177 | default y |
| 178 | |
| 179 | config PANIC_TIMEOUT |
| 180 | int |
| 181 | default 180 |
| 182 | |
| 183 | config COMPAT |
| 184 | bool |
| 185 | default y if PPC64 |
| 186 | select COMPAT_BINFMT_ELF |
| 187 | select ARCH_WANT_OLD_COMPAT_IPC |
| 188 | select COMPAT_OLD_SIGACTION |
| 189 | |
| 190 | config SYSVIPC_COMPAT |
| 191 | bool |
| 192 | depends on COMPAT && SYSVIPC |
| 193 | default y |
| 194 | |
| 195 | # All PPC32s use generic nvram driver through ppc_md |
| 196 | config GENERIC_NVRAM |
| 197 | bool |
| 198 | default y if PPC32 |
| 199 | |
| 200 | config SCHED_OMIT_FRAME_POINTER |
| 201 | bool |
| 202 | default y |
| 203 | |
| 204 | config ARCH_MAY_HAVE_PC_FDC |
| 205 | bool |
| 206 | default PCI |
| 207 | |
| 208 | config PPC_UDBG_16550 |
| 209 | bool |
| 210 | default n |
| 211 | |
| 212 | config GENERIC_TBSYNC |
| 213 | bool |
| 214 | default y if PPC32 && SMP |
| 215 | default n |
| 216 | |
| 217 | config AUDIT_ARCH |
| 218 | bool |
| 219 | default y |
| 220 | |
| 221 | config GENERIC_BUG |
| 222 | bool |
| 223 | default y |
| 224 | depends on BUG |
| 225 | |
| 226 | config SYS_SUPPORTS_APM_EMULATION |
| 227 | default y if PMAC_APM_EMU |
| 228 | bool |
| 229 | |
| 230 | config EPAPR_BOOT |
| 231 | bool |
| 232 | help |
| 233 | Used to allow a board to specify it wants an ePAPR compliant wrapper. |
| 234 | default n |
| 235 | |
| 236 | config DEFAULT_UIMAGE |
| 237 | bool |
| 238 | help |
| 239 | Used to allow a board to specify it wants a uImage built by default |
| 240 | default n |
| 241 | |
| 242 | config ARCH_HIBERNATION_POSSIBLE |
| 243 | bool |
| 244 | default y |
| 245 | |
| 246 | config ARCH_SUSPEND_POSSIBLE |
| 247 | def_bool y |
| 248 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
| 249 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
| 250 | || 44x || 40x |
| 251 | |
| 252 | config PPC_DCR_NATIVE |
| 253 | bool |
| 254 | default n |
| 255 | |
| 256 | config PPC_DCR_MMIO |
| 257 | bool |
| 258 | default n |
| 259 | |
| 260 | config PPC_DCR |
| 261 | bool |
| 262 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
| 263 | default y |
| 264 | |
| 265 | config PPC_OF_PLATFORM_PCI |
| 266 | bool |
| 267 | depends on PCI |
| 268 | depends on PPC64 # not supported on 32 bits yet |
| 269 | default n |
| 270 | |
| 271 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 272 | depends on PPC32 || PPC_STD_MMU_64 |
| 273 | def_bool y |
| 274 | |
| 275 | config ARCH_SUPPORTS_UPROBES |
| 276 | def_bool y |
| 277 | |
| 278 | config PPC_ADV_DEBUG_REGS |
| 279 | bool |
| 280 | depends on 40x || BOOKE |
| 281 | default y |
| 282 | |
| 283 | config PPC_ADV_DEBUG_IACS |
| 284 | int |
| 285 | depends on PPC_ADV_DEBUG_REGS |
| 286 | default 4 if 44x |
| 287 | default 2 |
| 288 | |
| 289 | config PPC_ADV_DEBUG_DACS |
| 290 | int |
| 291 | depends on PPC_ADV_DEBUG_REGS |
| 292 | default 2 |
| 293 | |
| 294 | config PPC_ADV_DEBUG_DVCS |
| 295 | int |
| 296 | depends on PPC_ADV_DEBUG_REGS |
| 297 | default 2 if 44x |
| 298 | default 0 |
| 299 | |
| 300 | config PPC_ADV_DEBUG_DAC_RANGE |
| 301 | bool |
| 302 | depends on PPC_ADV_DEBUG_REGS && 44x |
| 303 | default y |
| 304 | |
| 305 | config PPC_EMULATE_SSTEP |
| 306 | bool |
| 307 | default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT |
| 308 | |
| 309 | config ZONE_DMA32 |
| 310 | bool |
| 311 | default y if PPC64 |
| 312 | |
| 313 | config PGTABLE_LEVELS |
| 314 | int |
| 315 | default 2 if !PPC64 |
| 316 | default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 |
| 317 | default 4 |
| 318 | |
| 319 | source "init/Kconfig" |
| 320 | |
| 321 | source "kernel/Kconfig.freezer" |
| 322 | |
| 323 | source "arch/powerpc/sysdev/Kconfig" |
| 324 | source "arch/powerpc/platforms/Kconfig" |
| 325 | |
| 326 | menu "Kernel options" |
| 327 | |
| 328 | config HIGHMEM |
| 329 | bool "High memory support" |
| 330 | depends on PPC32 |
| 331 | |
| 332 | source kernel/Kconfig.hz |
| 333 | source kernel/Kconfig.preempt |
| 334 | source "fs/Kconfig.binfmt" |
| 335 | |
| 336 | config HUGETLB_PAGE_SIZE_VARIABLE |
| 337 | bool |
| 338 | depends on HUGETLB_PAGE |
| 339 | default y |
| 340 | |
| 341 | config MATH_EMULATION |
| 342 | bool "Math emulation" |
| 343 | depends on 4xx || 8xx || PPC_MPC832x || BOOKE |
| 344 | ---help--- |
| 345 | Some PowerPC chips designed for embedded applications do not have |
| 346 | a floating-point unit and therefore do not implement the |
| 347 | floating-point instructions in the PowerPC instruction set. If you |
| 348 | say Y here, the kernel will include code to emulate a floating-point |
| 349 | unit, which will allow programs that use floating-point |
| 350 | instructions to run. |
| 351 | |
| 352 | This is also useful to emulate missing (optional) instructions |
| 353 | such as fsqrt on cores that do have an FPU but do not implement |
| 354 | them (such as Freescale BookE). |
| 355 | |
| 356 | choice |
| 357 | prompt "Math emulation options" |
| 358 | default MATH_EMULATION_FULL |
| 359 | depends on MATH_EMULATION |
| 360 | |
| 361 | config MATH_EMULATION_FULL |
| 362 | bool "Emulate all the floating point instructions" |
| 363 | ---help--- |
| 364 | Select this option will enable the kernel to support to emulate |
| 365 | all the floating point instructions. If your SoC doesn't have |
| 366 | a FPU, you should select this. |
| 367 | |
| 368 | config MATH_EMULATION_HW_UNIMPLEMENTED |
| 369 | bool "Just emulate the FPU unimplemented instructions" |
| 370 | ---help--- |
| 371 | Select this if you know there does have a hardware FPU on your |
| 372 | SoC, but some floating point instructions are not implemented by that. |
| 373 | |
| 374 | endchoice |
| 375 | |
| 376 | config PPC_TRANSACTIONAL_MEM |
| 377 | bool "Transactional Memory support for POWERPC" |
| 378 | depends on PPC_BOOK3S_64 |
| 379 | depends on SMP |
| 380 | select ALTIVEC |
| 381 | select VSX |
| 382 | default n |
| 383 | ---help--- |
| 384 | Support user-mode Transactional Memory on POWERPC. |
| 385 | |
| 386 | config DISABLE_MPROFILE_KERNEL |
| 387 | bool "Disable use of mprofile-kernel for kernel tracing" |
| 388 | depends on PPC64 && CPU_LITTLE_ENDIAN |
| 389 | default y |
| 390 | help |
| 391 | Selecting this options disables use of the mprofile-kernel ABI for |
| 392 | kernel tracing. That will cause options such as live patching |
| 393 | (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to |
| 394 | be disabled also. |
| 395 | |
| 396 | If you have a toolchain which supports mprofile-kernel, then you can |
| 397 | enable this. Otherwise leave it disabled. If you're not sure, say |
| 398 | "N". |
| 399 | |
| 400 | config MPROFILE_KERNEL |
| 401 | depends on PPC64 && CPU_LITTLE_ENDIAN |
| 402 | def_bool !DISABLE_MPROFILE_KERNEL |
| 403 | |
| 404 | config IOMMU_HELPER |
| 405 | def_bool PPC64 |
| 406 | |
| 407 | config SWIOTLB |
| 408 | bool "SWIOTLB support" |
| 409 | default n |
| 410 | select IOMMU_HELPER |
| 411 | ---help--- |
| 412 | Support for IO bounce buffering for systems without an IOMMU. |
| 413 | This allows us to DMA to the full physical address space on |
| 414 | platforms where the size of a physical address is larger |
| 415 | than the bus address. Not all platforms support this. |
| 416 | |
| 417 | config HOTPLUG_CPU |
| 418 | bool "Support for enabling/disabling CPUs" |
| 419 | depends on SMP && (PPC_PSERIES || \ |
| 420 | PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
| 421 | ---help--- |
| 422 | Say Y here to be able to disable and re-enable individual |
| 423 | CPUs at runtime on SMP machines. |
| 424 | |
| 425 | Say N if you are unsure. |
| 426 | |
| 427 | config ARCH_CPU_PROBE_RELEASE |
| 428 | def_bool y |
| 429 | depends on HOTPLUG_CPU |
| 430 | |
| 431 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 432 | def_bool y |
| 433 | |
| 434 | config ARCH_HAS_WALK_MEMORY |
| 435 | def_bool y |
| 436 | |
| 437 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 438 | def_bool y |
| 439 | |
| 440 | config PPC64_SUPPORTS_MEMORY_FAILURE |
| 441 | bool "Add support for memory hwpoison" |
| 442 | depends on PPC_BOOK3S_64 |
| 443 | default "y" if PPC_POWERNV |
| 444 | select ARCH_SUPPORTS_MEMORY_FAILURE |
| 445 | |
| 446 | config KEXEC |
| 447 | bool "kexec system call" |
| 448 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
| 449 | select KEXEC_CORE |
| 450 | help |
| 451 | kexec is a system call that implements the ability to shutdown your |
| 452 | current kernel, and to start another kernel. It is like a reboot |
| 453 | but it is independent of the system firmware. And like a reboot |
| 454 | you can start any kernel with it, not just Linux. |
| 455 | |
| 456 | The name comes from the similarity to the exec system call. |
| 457 | |
| 458 | It is an ongoing process to be certain the hardware in a machine |
| 459 | is properly shutdown, so do not be surprised if this code does not |
| 460 | initially work for you. As of this writing the exact hardware |
| 461 | interface is strongly in flux, so no good recommendation can be |
| 462 | made. |
| 463 | |
| 464 | config RELOCATABLE |
| 465 | bool "Build a relocatable kernel" |
| 466 | depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE)) |
| 467 | select NONSTATIC_KERNEL |
| 468 | help |
| 469 | This builds a kernel image that is capable of running at the |
| 470 | location the kernel is loaded at. For ppc32, there is no any |
| 471 | alignment restrictions, and this feature is a superset of |
| 472 | DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use |
| 473 | 16k-aligned base address. The kernel is linked as a |
| 474 | position-independent executable (PIE) and contains dynamic relocations |
| 475 | which are processed early in the bootup process. |
| 476 | |
| 477 | One use is for the kexec on panic case where the recovery kernel |
| 478 | must live at a different physical address than the primary |
| 479 | kernel. |
| 480 | |
| 481 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 482 | it has been loaded at and the compile time physical addresses |
| 483 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
| 484 | setting can still be useful to bootwrappers that need to know the |
| 485 | load address of the kernel (eg. u-boot/mkimage). |
| 486 | |
| 487 | config CRASH_DUMP |
| 488 | bool "Build a kdump crash kernel" |
| 489 | depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) |
| 490 | select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE |
| 491 | help |
| 492 | Build a kernel suitable for use as a kdump capture kernel. |
| 493 | The same kernel binary can be used as production kernel and dump |
| 494 | capture kernel. |
| 495 | |
| 496 | config FA_DUMP |
| 497 | bool "Firmware-assisted dump" |
| 498 | depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC |
| 499 | help |
| 500 | A robust mechanism to get reliable kernel crash dump with |
| 501 | assistance from firmware. This approach does not use kexec, |
| 502 | instead firmware assists in booting the kdump kernel |
| 503 | while preserving memory contents. Firmware-assisted dump |
| 504 | is meant to be a kdump replacement offering robustness and |
| 505 | speed not possible without system firmware assistance. |
| 506 | |
| 507 | If unsure, say "N" |
| 508 | |
| 509 | config IRQ_ALL_CPUS |
| 510 | bool "Distribute interrupts on all CPUs by default" |
| 511 | depends on SMP |
| 512 | help |
| 513 | This option gives the kernel permission to distribute IRQs across |
| 514 | multiple CPUs. Saying N here will route all IRQs to the first |
| 515 | CPU. Generally saying Y is safe, although some problems have been |
| 516 | reported with SMP Power Macintoshes with this option enabled. |
| 517 | |
| 518 | config NUMA |
| 519 | bool "NUMA support" |
| 520 | depends on PPC64 |
| 521 | default y if SMP && PPC_PSERIES |
| 522 | |
| 523 | config NODES_SHIFT |
| 524 | int |
| 525 | default "8" if PPC64 |
| 526 | default "4" |
| 527 | depends on NEED_MULTIPLE_NODES |
| 528 | |
| 529 | config USE_PERCPU_NUMA_NODE_ID |
| 530 | def_bool y |
| 531 | depends on NUMA |
| 532 | |
| 533 | config HAVE_MEMORYLESS_NODES |
| 534 | def_bool y |
| 535 | depends on NUMA |
| 536 | |
| 537 | config ARCH_SELECT_MEMORY_MODEL |
| 538 | def_bool y |
| 539 | depends on PPC64 |
| 540 | |
| 541 | config ARCH_FLATMEM_ENABLE |
| 542 | def_bool y |
| 543 | depends on (PPC64 && !NUMA) || PPC32 |
| 544 | |
| 545 | config ARCH_SPARSEMEM_ENABLE |
| 546 | def_bool y |
| 547 | depends on PPC64 |
| 548 | select SPARSEMEM_VMEMMAP_ENABLE |
| 549 | |
| 550 | config ARCH_SPARSEMEM_DEFAULT |
| 551 | def_bool y |
| 552 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
| 553 | |
| 554 | config SYS_SUPPORTS_HUGETLBFS |
| 555 | bool |
| 556 | |
| 557 | source "mm/Kconfig" |
| 558 | |
| 559 | config ARCH_MEMORY_PROBE |
| 560 | def_bool y |
| 561 | depends on MEMORY_HOTPLUG |
| 562 | |
| 563 | # Some NUMA nodes have memory ranges that span |
| 564 | # other nodes. Even though a pfn is valid and |
| 565 | # between a node's start and end pfns, it may not |
| 566 | # reside on that node. See memmap_init_zone() |
| 567 | # for details. |
| 568 | config NODES_SPAN_OTHER_NODES |
| 569 | def_bool y |
| 570 | depends on NEED_MULTIPLE_NODES |
| 571 | |
| 572 | config STDBINUTILS |
| 573 | bool "Using standard binutils settings" |
| 574 | depends on 44x |
| 575 | default y |
| 576 | help |
| 577 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. |
| 578 | Note, that kernel will be able to run only those applications, |
| 579 | which had been compiled using binutils later than 2.17.50.0.3 with |
| 580 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using |
| 581 | the older binutils, you can patch them with a trivial patch, which |
| 582 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. |
| 583 | |
| 584 | choice |
| 585 | prompt "Page size" |
| 586 | default PPC_4K_PAGES |
| 587 | help |
| 588 | Select the kernel logical page size. Increasing the page size |
| 589 | will reduce software overhead at each page boundary, allow |
| 590 | hardware prefetch mechanisms to be more effective, and allow |
| 591 | larger dma transfers increasing IO efficiency and reducing |
| 592 | overhead. However the utilization of memory will increase. |
| 593 | For example, each cached file will using a multiple of the |
| 594 | page size to hold its contents and the difference between the |
| 595 | end of file and the end of page is wasted. |
| 596 | |
| 597 | Some dedicated systems, such as software raid serving with |
| 598 | accelerated calculations, have shown significant increases. |
| 599 | |
| 600 | If you configure a 64 bit kernel for 64k pages but the |
| 601 | processor does not support them, then the kernel will simulate |
| 602 | them with 4k pages, loading them on demand, but with the |
| 603 | reduced software overhead and larger internal fragmentation. |
| 604 | For the 32 bit kernel, a large page option will not be offered |
| 605 | unless it is supported by the configured processor. |
| 606 | |
| 607 | If unsure, choose 4K_PAGES. |
| 608 | |
| 609 | config PPC_4K_PAGES |
| 610 | bool "4k page size" |
| 611 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 612 | |
| 613 | config PPC_16K_PAGES |
| 614 | bool "16k page size" |
| 615 | depends on 44x || PPC_8xx |
| 616 | |
| 617 | config PPC_64K_PAGES |
| 618 | bool "64k page size" |
| 619 | depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) |
| 620 | select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
| 621 | |
| 622 | config PPC_256K_PAGES |
| 623 | bool "256k page size" |
| 624 | depends on 44x && !STDBINUTILS |
| 625 | help |
| 626 | Make the page size 256k. |
| 627 | |
| 628 | As the ELF standard only requires alignment to support page |
| 629 | sizes up to 64k, you will need to compile all of your user |
| 630 | space applications with a non-standard binutils settings |
| 631 | (see the STDBINUTILS description for details). |
| 632 | |
| 633 | Say N unless you know what you are doing. |
| 634 | |
| 635 | endchoice |
| 636 | |
| 637 | config FORCE_MAX_ZONEORDER |
| 638 | int "Maximum zone order" |
| 639 | range 8 9 if PPC64 && PPC_64K_PAGES |
| 640 | default "9" if PPC64 && PPC_64K_PAGES |
| 641 | range 9 13 if PPC64 && !PPC_64K_PAGES |
| 642 | default "13" if PPC64 && !PPC_64K_PAGES |
| 643 | range 9 64 if PPC32 && PPC_16K_PAGES |
| 644 | default "9" if PPC32 && PPC_16K_PAGES |
| 645 | range 7 64 if PPC32 && PPC_64K_PAGES |
| 646 | default "7" if PPC32 && PPC_64K_PAGES |
| 647 | range 5 64 if PPC32 && PPC_256K_PAGES |
| 648 | default "5" if PPC32 && PPC_256K_PAGES |
| 649 | range 11 64 |
| 650 | default "11" |
| 651 | help |
| 652 | The kernel memory allocator divides physically contiguous memory |
| 653 | blocks into "zones", where each zone is a power of two number of |
| 654 | pages. This option selects the largest power of two that the kernel |
| 655 | keeps in the memory allocator. If you need to allocate very large |
| 656 | blocks of physically contiguous memory, then you may need to |
| 657 | increase this value. |
| 658 | |
| 659 | This config option is actually maximum order plus one. For example, |
| 660 | a value of 11 means that the largest free memory block is 2^10 pages. |
| 661 | |
| 662 | The page size is not necessarily 4KB. For example, on 64-bit |
| 663 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
| 664 | this in mind when choosing a value for this option. |
| 665 | |
| 666 | config PPC_SUBPAGE_PROT |
| 667 | bool "Support setting protections for 4k subpages" |
| 668 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
| 669 | help |
| 670 | This option adds support for a system call to allow user programs |
| 671 | to set access permissions (read/write, readonly, or no access) |
| 672 | on the 4k subpages of each 64k page. |
| 673 | |
| 674 | config PPC_COPRO_BASE |
| 675 | bool |
| 676 | default n |
| 677 | |
| 678 | config SCHED_SMT |
| 679 | bool "SMT (Hyperthreading) scheduler support" |
| 680 | depends on PPC64 && SMP |
| 681 | help |
| 682 | SMT scheduler support improves the CPU scheduler's decision making |
| 683 | when dealing with POWER5 cpus at a cost of slightly increased |
| 684 | overhead in some places. If unsure say N here. |
| 685 | |
| 686 | config PPC_DENORMALISATION |
| 687 | bool "PowerPC denormalisation exception handling" |
| 688 | depends on PPC_BOOK3S_64 |
| 689 | default "y" if PPC_POWERNV |
| 690 | ---help--- |
| 691 | Add support for handling denormalisation of single precision |
| 692 | values. Useful for bare metal only. If unsure say Y here. |
| 693 | |
| 694 | config CMDLINE_BOOL |
| 695 | bool "Default bootloader kernel arguments" |
| 696 | |
| 697 | config CMDLINE |
| 698 | string "Initial kernel command string" |
| 699 | depends on CMDLINE_BOOL |
| 700 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" |
| 701 | help |
| 702 | On some platforms, there is currently no way for the boot loader to |
| 703 | pass arguments to the kernel. For these platforms, you can supply |
| 704 | some command-line options at build time by entering them here. In |
| 705 | most cases you will need to specify the root device here. |
| 706 | |
| 707 | config CMDLINE_FORCE |
| 708 | bool "Always use the default kernel command string" |
| 709 | depends on CMDLINE_BOOL |
| 710 | help |
| 711 | Always use the default kernel command string, even if the boot |
| 712 | loader passes other arguments to the kernel. |
| 713 | This is useful if you cannot or don't want to change the |
| 714 | command-line options your boot loader passes to the kernel. |
| 715 | |
| 716 | config EXTRA_TARGETS |
| 717 | string "Additional default image types" |
| 718 | help |
| 719 | List additional targets to be built by the bootwrapper here (separated |
| 720 | by spaces). This is useful for targets that depend of device tree |
| 721 | files in the .dts directory. |
| 722 | |
| 723 | Targets in this list will be build as part of the default build |
| 724 | target, or when the user does a 'make zImage' or a |
| 725 | 'make zImage.initrd'. |
| 726 | |
| 727 | If unsure, leave blank |
| 728 | |
| 729 | config ARCH_WANTS_FREEZER_CONTROL |
| 730 | def_bool y |
| 731 | depends on ADB_PMU |
| 732 | |
| 733 | source kernel/power/Kconfig |
| 734 | |
| 735 | config SECCOMP |
| 736 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 737 | depends on PROC_FS |
| 738 | default y |
| 739 | help |
| 740 | This kernel feature is useful for number crunching applications |
| 741 | that may need to compute untrusted bytecode during their |
| 742 | execution. By using pipes or other transports made available to |
| 743 | the process as file descriptors supporting the read/write |
| 744 | syscalls, it's possible to isolate those applications in |
| 745 | their own address space using seccomp. Once seccomp is |
| 746 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 747 | and the task is only allowed to execute a few safe syscalls |
| 748 | defined by each seccomp mode. |
| 749 | |
| 750 | If unsure, say Y. Only embedded should say N here. |
| 751 | |
| 752 | endmenu |
| 753 | |
| 754 | config ISA_DMA_API |
| 755 | bool |
| 756 | default PCI |
| 757 | |
| 758 | menu "Bus options" |
| 759 | |
| 760 | config ISA |
| 761 | bool "Support for ISA-bus hardware" |
| 762 | depends on PPC_CHRP |
| 763 | select PPC_I8259 |
| 764 | help |
| 765 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 766 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 767 | inside your box. If you have an Apple machine, say N here; if you |
| 768 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
| 769 | embedded board, consult your board documentation. |
| 770 | |
| 771 | config ZONE_DMA |
| 772 | bool |
| 773 | default y |
| 774 | |
| 775 | config NEED_DMA_MAP_STATE |
| 776 | def_bool (PPC64 || NOT_COHERENT_CACHE) |
| 777 | |
| 778 | config NEED_SG_DMA_LENGTH |
| 779 | def_bool y |
| 780 | |
| 781 | config GENERIC_ISA_DMA |
| 782 | bool |
| 783 | depends on ISA_DMA_API |
| 784 | default y |
| 785 | |
| 786 | config PPC_INDIRECT_PCI |
| 787 | bool |
| 788 | depends on PCI |
| 789 | default y if 40x || 44x |
| 790 | default n |
| 791 | |
| 792 | config EISA |
| 793 | bool |
| 794 | |
| 795 | config SBUS |
| 796 | bool |
| 797 | |
| 798 | config FSL_SOC |
| 799 | bool |
| 800 | |
| 801 | config FSL_PCI |
| 802 | bool |
| 803 | select PPC_INDIRECT_PCI |
| 804 | select PCI_QUIRKS |
| 805 | |
| 806 | config FSL_PMC |
| 807 | bool |
| 808 | default y |
| 809 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
| 810 | help |
| 811 | Freescale MPC85xx/MPC86xx power management controller support |
| 812 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
| 813 | |
| 814 | config PPC4xx_CPM |
| 815 | bool |
| 816 | default y |
| 817 | depends on SUSPEND && (44x || 40x) |
| 818 | help |
| 819 | PPC4xx Clock Power Management (CPM) support (suspend/resume). |
| 820 | It also enables support for two different idle states (idle-wait |
| 821 | and idle-doze). |
| 822 | |
| 823 | config 4xx_SOC |
| 824 | bool |
| 825 | |
| 826 | config FSL_LBC |
| 827 | bool "Freescale Local Bus support" |
| 828 | help |
| 829 | Enables reporting of errors from the Freescale local bus |
| 830 | controller. Also contains some common code used by |
| 831 | drivers for specific local bus peripherals. |
| 832 | |
| 833 | config FSL_GTM |
| 834 | bool |
| 835 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
| 836 | help |
| 837 | Freescale General-purpose Timers support |
| 838 | |
| 839 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
| 840 | config MCA |
| 841 | bool |
| 842 | |
| 843 | # Platforms that what PCI turned unconditionally just do select PCI |
| 844 | # in their config node. Platforms that want to choose at config |
| 845 | # time should select PPC_PCI_CHOICE |
| 846 | config PPC_PCI_CHOICE |
| 847 | bool |
| 848 | |
| 849 | config PCI |
| 850 | bool "PCI support" if PPC_PCI_CHOICE |
| 851 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ |
| 852 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
| 853 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
| 854 | select GENERIC_PCI_IOMAP |
| 855 | help |
| 856 | Find out whether your system includes a PCI bus. PCI is the name of |
| 857 | a bus system, i.e. the way the CPU talks to the other stuff inside |
| 858 | your box. If you say Y here, the kernel will include drivers and |
| 859 | infrastructure code to support PCI bus devices. |
| 860 | |
| 861 | config PCI_DOMAINS |
| 862 | def_bool PCI |
| 863 | |
| 864 | config PCI_SYSCALL |
| 865 | def_bool PCI |
| 866 | |
| 867 | config PCI_QSPAN |
| 868 | bool "QSpan PCI" |
| 869 | depends on !4xx && !CPM2 && 8xx |
| 870 | select PPC_I8259 |
| 871 | help |
| 872 | Say Y here if you have a system based on a Motorola 8xx-series |
| 873 | embedded processor with a QSPAN PCI interface, otherwise say N. |
| 874 | |
| 875 | config PCI_8260 |
| 876 | bool |
| 877 | depends on PCI && 8260 |
| 878 | select PPC_INDIRECT_PCI |
| 879 | default y |
| 880 | |
| 881 | source "drivers/pci/Kconfig" |
| 882 | |
| 883 | source "drivers/pcmcia/Kconfig" |
| 884 | |
| 885 | config HAS_RAPIDIO |
| 886 | bool |
| 887 | default n |
| 888 | |
| 889 | config RAPIDIO |
| 890 | tristate "RapidIO support" |
| 891 | depends on HAS_RAPIDIO || PCI |
| 892 | help |
| 893 | If you say Y here, the kernel will include drivers and |
| 894 | infrastructure code to support RapidIO interconnect devices. |
| 895 | |
| 896 | config FSL_RIO |
| 897 | bool "Freescale Embedded SRIO Controller support" |
| 898 | depends on RAPIDIO = y && HAS_RAPIDIO |
| 899 | default "n" |
| 900 | ---help--- |
| 901 | Include support for RapidIO controller on Freescale embedded |
| 902 | processors (MPC8548, MPC8641, etc). |
| 903 | |
| 904 | source "drivers/rapidio/Kconfig" |
| 905 | |
| 906 | endmenu |
| 907 | |
| 908 | config NONSTATIC_KERNEL |
| 909 | bool |
| 910 | default n |
| 911 | |
| 912 | menu "Advanced setup" |
| 913 | depends on PPC32 |
| 914 | |
| 915 | config ADVANCED_OPTIONS |
| 916 | bool "Prompt for advanced kernel configuration options" |
| 917 | help |
| 918 | This option will enable prompting for a variety of advanced kernel |
| 919 | configuration options. These options can cause the kernel to not |
| 920 | work if they are set incorrectly, but can be used to optimize certain |
| 921 | aspects of kernel memory management. |
| 922 | |
| 923 | Unless you know what you are doing, say N here. |
| 924 | |
| 925 | comment "Default settings for advanced configuration options are used" |
| 926 | depends on !ADVANCED_OPTIONS |
| 927 | |
| 928 | config LOWMEM_SIZE_BOOL |
| 929 | bool "Set maximum low memory" |
| 930 | depends on ADVANCED_OPTIONS |
| 931 | help |
| 932 | This option allows you to set the maximum amount of memory which |
| 933 | will be used as "low memory", that is, memory which the kernel can |
| 934 | access directly, without having to set up a kernel virtual mapping. |
| 935 | This can be useful in optimizing the layout of kernel virtual |
| 936 | memory. |
| 937 | |
| 938 | Say N here unless you know what you are doing. |
| 939 | |
| 940 | config LOWMEM_SIZE |
| 941 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
| 942 | default "0x30000000" |
| 943 | |
| 944 | config LOWMEM_CAM_NUM_BOOL |
| 945 | bool "Set number of CAMs to use to map low memory" |
| 946 | depends on ADVANCED_OPTIONS && FSL_BOOKE |
| 947 | help |
| 948 | This option allows you to set the maximum number of CAM slots that |
| 949 | will be used to map low memory. There are a limited number of slots |
| 950 | available and even more limited number that will fit in the L1 MMU. |
| 951 | However, using more entries will allow mapping more low memory. This |
| 952 | can be useful in optimizing the layout of kernel virtual memory. |
| 953 | |
| 954 | Say N here unless you know what you are doing. |
| 955 | |
| 956 | config LOWMEM_CAM_NUM |
| 957 | depends on FSL_BOOKE |
| 958 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
| 959 | default 3 |
| 960 | |
| 961 | config DYNAMIC_MEMSTART |
| 962 | bool "Enable page aligned dynamic load address for kernel" |
| 963 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) |
| 964 | select NONSTATIC_KERNEL |
| 965 | help |
| 966 | This option enables the kernel to be loaded at any page aligned |
| 967 | physical address. The kernel creates a mapping from KERNELBASE to |
| 968 | the address where the kernel is loaded. The page size here implies |
| 969 | the TLB page size of the mapping for kernel on the particular platform. |
| 970 | Please refer to the init code for finding the TLB page size. |
| 971 | |
| 972 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
| 973 | kernel image, where the only restriction is the page aligned kernel |
| 974 | load address. When this option is enabled, the compile time physical |
| 975 | address CONFIG_PHYSICAL_START is ignored. |
| 976 | |
| 977 | This option is overridden by CONFIG_RELOCATABLE |
| 978 | |
| 979 | config PAGE_OFFSET_BOOL |
| 980 | bool "Set custom page offset address" |
| 981 | depends on ADVANCED_OPTIONS |
| 982 | help |
| 983 | This option allows you to set the kernel virtual address at which |
| 984 | the kernel will map low memory. This can be useful in optimizing |
| 985 | the virtual memory layout of the system. |
| 986 | |
| 987 | Say N here unless you know what you are doing. |
| 988 | |
| 989 | config PAGE_OFFSET |
| 990 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
| 991 | default "0xc0000000" |
| 992 | |
| 993 | config KERNEL_START_BOOL |
| 994 | bool "Set custom kernel base address" |
| 995 | depends on ADVANCED_OPTIONS |
| 996 | help |
| 997 | This option allows you to set the kernel virtual address at which |
| 998 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
| 999 | however there are times (like kdump) that one might not want them |
| 1000 | to be the same. |
| 1001 | |
| 1002 | Say N here unless you know what you are doing. |
| 1003 | |
| 1004 | config KERNEL_START |
| 1005 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
| 1006 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
| 1007 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
| 1008 | default "0xc0000000" |
| 1009 | |
| 1010 | config PHYSICAL_START_BOOL |
| 1011 | bool "Set physical address where the kernel is loaded" |
| 1012 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
| 1013 | help |
| 1014 | This gives the physical address where the kernel is loaded. |
| 1015 | |
| 1016 | Say N here unless you know what you are doing. |
| 1017 | |
| 1018 | config PHYSICAL_START |
| 1019 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
| 1020 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL |
| 1021 | default "0x00000000" |
| 1022 | |
| 1023 | config PHYSICAL_ALIGN |
| 1024 | hex |
| 1025 | default "0x04000000" if FSL_BOOKE |
| 1026 | help |
| 1027 | This value puts the alignment restrictions on physical address |
| 1028 | where kernel is loaded and run from. Kernel is compiled for an |
| 1029 | address which meets above alignment restriction. |
| 1030 | |
| 1031 | config TASK_SIZE_BOOL |
| 1032 | bool "Set custom user task size" |
| 1033 | depends on ADVANCED_OPTIONS |
| 1034 | help |
| 1035 | This option allows you to set the amount of virtual address space |
| 1036 | allocated to user tasks. This can be useful in optimizing the |
| 1037 | virtual memory layout of the system. |
| 1038 | |
| 1039 | Say N here unless you know what you are doing. |
| 1040 | |
| 1041 | config TASK_SIZE |
| 1042 | hex "Size of user task space" if TASK_SIZE_BOOL |
| 1043 | default "0x80000000" if PPC_8xx |
| 1044 | default "0xc0000000" |
| 1045 | |
| 1046 | config CONSISTENT_SIZE_BOOL |
| 1047 | bool "Set custom consistent memory pool size" |
| 1048 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE |
| 1049 | help |
| 1050 | This option allows you to set the size of the |
| 1051 | consistent memory pool. This pool of virtual memory |
| 1052 | is used to make consistent memory allocations. |
| 1053 | |
| 1054 | config CONSISTENT_SIZE |
| 1055 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL |
| 1056 | default "0x00200000" if NOT_COHERENT_CACHE |
| 1057 | |
| 1058 | config PIN_TLB |
| 1059 | bool "Pinned Kernel TLBs (860 ONLY)" |
| 1060 | depends on ADVANCED_OPTIONS && 8xx |
| 1061 | |
| 1062 | config PIN_TLB_IMMR |
| 1063 | bool "Pinned TLB for IMMR" |
| 1064 | depends on PIN_TLB |
| 1065 | default y |
| 1066 | endmenu |
| 1067 | |
| 1068 | if PPC64 |
| 1069 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
| 1070 | config PAGE_OFFSET |
| 1071 | hex |
| 1072 | default "0xc000000000000000" |
| 1073 | config KERNEL_START |
| 1074 | hex |
| 1075 | default "0xc000000000000000" |
| 1076 | config PHYSICAL_START |
| 1077 | hex |
| 1078 | default "0x00000000" |
| 1079 | endif |
| 1080 | |
| 1081 | config ARCH_RANDOM |
| 1082 | def_bool n |
| 1083 | |
| 1084 | source "net/Kconfig" |
| 1085 | |
| 1086 | source "drivers/Kconfig" |
| 1087 | |
| 1088 | source "fs/Kconfig" |
| 1089 | |
| 1090 | source "lib/Kconfig" |
| 1091 | |
| 1092 | source "arch/powerpc/Kconfig.debug" |
| 1093 | |
| 1094 | source "security/Kconfig" |
| 1095 | |
| 1096 | config KEYS_COMPAT |
| 1097 | bool |
| 1098 | depends on COMPAT && KEYS |
| 1099 | default y |
| 1100 | |
| 1101 | source "crypto/Kconfig" |
| 1102 | |
| 1103 | config PPC_LIB_RHEAP |
| 1104 | bool |
| 1105 | |
| 1106 | source "arch/powerpc/kvm/Kconfig" |
| 1107 | |
| 1108 | source "kernel/livepatch/Kconfig" |