| 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 HAVE_LATENCYTOP_SUPPORT |
| 51 | def_bool y |
| 52 | |
| 53 | config TRACE_IRQFLAGS_SUPPORT |
| 54 | bool |
| 55 | default y |
| 56 | |
| 57 | config LOCKDEP_SUPPORT |
| 58 | bool |
| 59 | default y |
| 60 | |
| 61 | config RWSEM_GENERIC_SPINLOCK |
| 62 | bool |
| 63 | |
| 64 | config RWSEM_XCHGADD_ALGORITHM |
| 65 | bool |
| 66 | default y |
| 67 | |
| 68 | config GENERIC_LOCKBREAK |
| 69 | bool |
| 70 | default y |
| 71 | depends on SMP && PREEMPT |
| 72 | |
| 73 | config ARCH_HAS_ILOG2_U32 |
| 74 | bool |
| 75 | default y |
| 76 | |
| 77 | config ARCH_HAS_ILOG2_U64 |
| 78 | bool |
| 79 | default y if 64BIT |
| 80 | |
| 81 | config GENERIC_HWEIGHT |
| 82 | bool |
| 83 | default y |
| 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 OF |
| 92 | select OF_EARLY_FLATTREE |
| 93 | select HAVE_FTRACE_MCOUNT_RECORD |
| 94 | select HAVE_DYNAMIC_FTRACE |
| 95 | select HAVE_FUNCTION_TRACER |
| 96 | select HAVE_FUNCTION_GRAPH_TRACER |
| 97 | select SYSCTL_EXCEPTION_TRACE |
| 98 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 99 | select VIRT_TO_BUS if !PPC64 |
| 100 | select HAVE_IDE |
| 101 | select HAVE_IOREMAP_PROT |
| 102 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN |
| 103 | select HAVE_KPROBES |
| 104 | select HAVE_ARCH_KGDB |
| 105 | select HAVE_KRETPROBES |
| 106 | select HAVE_ARCH_TRACEHOOK |
| 107 | select HAVE_MEMBLOCK |
| 108 | select HAVE_MEMBLOCK_NODE_MAP |
| 109 | select HAVE_DMA_ATTRS |
| 110 | select HAVE_DMA_API_DEBUG |
| 111 | select HAVE_OPROFILE |
| 112 | select HAVE_DEBUG_KMEMLEAK |
| 113 | select GENERIC_ATOMIC64 if PPC32 |
| 114 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
| 115 | select HAVE_PERF_EVENTS |
| 116 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 117 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 |
| 118 | select ARCH_WANT_IPC_PARSE_VERSION |
| 119 | select SPARSE_IRQ |
| 120 | select IRQ_DOMAIN |
| 121 | select GENERIC_IRQ_SHOW |
| 122 | select GENERIC_IRQ_SHOW_LEVEL |
| 123 | select IRQ_FORCED_THREADING |
| 124 | select HAVE_RCU_TABLE_FREE if SMP |
| 125 | select HAVE_SYSCALL_TRACEPOINTS |
| 126 | select HAVE_BPF_JIT if PPC64 |
| 127 | select HAVE_ARCH_JUMP_LABEL |
| 128 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| 129 | select GENERIC_SMP_IDLE_THREAD |
| 130 | select GENERIC_CMOS_UPDATE |
| 131 | select GENERIC_TIME_VSYSCALL_OLD |
| 132 | select GENERIC_CLOCKEVENTS |
| 133 | select GENERIC_STRNCPY_FROM_USER |
| 134 | select GENERIC_STRNLEN_USER |
| 135 | select HAVE_MOD_ARCH_SPECIFIC |
| 136 | select MODULES_USE_ELF_RELA |
| 137 | select CLONE_BACKWARDS |
| 138 | select ARCH_USE_BUILTIN_BSWAP |
| 139 | select OLD_SIGSUSPEND |
| 140 | select OLD_SIGACTION if PPC32 |
| 141 | select HAVE_DEBUG_STACKOVERFLOW |
| 142 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
| 143 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
| 144 | |
| 145 | config GENERIC_CSUM |
| 146 | def_bool CPU_LITTLE_ENDIAN |
| 147 | |
| 148 | config EARLY_PRINTK |
| 149 | bool |
| 150 | default y |
| 151 | |
| 152 | config PANIC_TIMEOUT |
| 153 | int |
| 154 | default 180 |
| 155 | |
| 156 | config COMPAT |
| 157 | bool |
| 158 | default y if PPC64 |
| 159 | select COMPAT_BINFMT_ELF |
| 160 | select ARCH_WANT_OLD_COMPAT_IPC |
| 161 | select COMPAT_OLD_SIGACTION |
| 162 | |
| 163 | config SYSVIPC_COMPAT |
| 164 | bool |
| 165 | depends on COMPAT && SYSVIPC |
| 166 | default y |
| 167 | |
| 168 | # All PPC32s use generic nvram driver through ppc_md |
| 169 | config GENERIC_NVRAM |
| 170 | bool |
| 171 | default y if PPC32 |
| 172 | |
| 173 | config SCHED_OMIT_FRAME_POINTER |
| 174 | bool |
| 175 | default y |
| 176 | |
| 177 | config ARCH_MAY_HAVE_PC_FDC |
| 178 | bool |
| 179 | default !PPC_PSERIES || PCI |
| 180 | |
| 181 | config PPC_OF |
| 182 | def_bool y |
| 183 | |
| 184 | config PPC_UDBG_16550 |
| 185 | bool |
| 186 | default n |
| 187 | |
| 188 | config GENERIC_TBSYNC |
| 189 | bool |
| 190 | default y if PPC32 && SMP |
| 191 | default n |
| 192 | |
| 193 | config AUDIT_ARCH |
| 194 | bool |
| 195 | default y |
| 196 | |
| 197 | config GENERIC_BUG |
| 198 | bool |
| 199 | default y |
| 200 | depends on BUG |
| 201 | |
| 202 | config SYS_SUPPORTS_APM_EMULATION |
| 203 | default y if PMAC_APM_EMU |
| 204 | bool |
| 205 | |
| 206 | config EPAPR_BOOT |
| 207 | bool |
| 208 | help |
| 209 | Used to allow a board to specify it wants an ePAPR compliant wrapper. |
| 210 | default n |
| 211 | |
| 212 | config DEFAULT_UIMAGE |
| 213 | bool |
| 214 | help |
| 215 | Used to allow a board to specify it wants a uImage built by default |
| 216 | default n |
| 217 | |
| 218 | config ARCH_HIBERNATION_POSSIBLE |
| 219 | bool |
| 220 | default y |
| 221 | |
| 222 | config ARCH_SUSPEND_POSSIBLE |
| 223 | def_bool y |
| 224 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
| 225 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
| 226 | || 44x || 40x |
| 227 | |
| 228 | config PPC_DCR_NATIVE |
| 229 | bool |
| 230 | default n |
| 231 | |
| 232 | config PPC_DCR_MMIO |
| 233 | bool |
| 234 | default n |
| 235 | |
| 236 | config PPC_DCR |
| 237 | bool |
| 238 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
| 239 | default y |
| 240 | |
| 241 | config PPC_OF_PLATFORM_PCI |
| 242 | bool |
| 243 | depends on PCI |
| 244 | depends on PPC64 # not supported on 32 bits yet |
| 245 | default n |
| 246 | |
| 247 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 248 | def_bool y |
| 249 | |
| 250 | config ARCH_SUPPORTS_UPROBES |
| 251 | def_bool y |
| 252 | |
| 253 | config PPC_ADV_DEBUG_REGS |
| 254 | bool |
| 255 | depends on 40x || BOOKE |
| 256 | default y |
| 257 | |
| 258 | config PPC_ADV_DEBUG_IACS |
| 259 | int |
| 260 | depends on PPC_ADV_DEBUG_REGS |
| 261 | default 4 if 44x |
| 262 | default 2 |
| 263 | |
| 264 | config PPC_ADV_DEBUG_DACS |
| 265 | int |
| 266 | depends on PPC_ADV_DEBUG_REGS |
| 267 | default 2 |
| 268 | |
| 269 | config PPC_ADV_DEBUG_DVCS |
| 270 | int |
| 271 | depends on PPC_ADV_DEBUG_REGS |
| 272 | default 2 if 44x |
| 273 | default 0 |
| 274 | |
| 275 | config PPC_ADV_DEBUG_DAC_RANGE |
| 276 | bool |
| 277 | depends on PPC_ADV_DEBUG_REGS && 44x |
| 278 | default y |
| 279 | |
| 280 | config PPC_EMULATE_SSTEP |
| 281 | bool |
| 282 | default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT |
| 283 | |
| 284 | source "init/Kconfig" |
| 285 | |
| 286 | source "kernel/Kconfig.freezer" |
| 287 | |
| 288 | source "arch/powerpc/sysdev/Kconfig" |
| 289 | source "arch/powerpc/platforms/Kconfig" |
| 290 | |
| 291 | menu "Kernel options" |
| 292 | |
| 293 | config HIGHMEM |
| 294 | bool "High memory support" |
| 295 | depends on PPC32 |
| 296 | |
| 297 | source kernel/Kconfig.hz |
| 298 | source kernel/Kconfig.preempt |
| 299 | source "fs/Kconfig.binfmt" |
| 300 | |
| 301 | config HUGETLB_PAGE_SIZE_VARIABLE |
| 302 | bool |
| 303 | depends on HUGETLB_PAGE |
| 304 | default y |
| 305 | |
| 306 | config MATH_EMULATION |
| 307 | bool "Math emulation" |
| 308 | depends on 4xx || 8xx || PPC_MPC832x || BOOKE |
| 309 | ---help--- |
| 310 | Some PowerPC chips designed for embedded applications do not have |
| 311 | a floating-point unit and therefore do not implement the |
| 312 | floating-point instructions in the PowerPC instruction set. If you |
| 313 | say Y here, the kernel will include code to emulate a floating-point |
| 314 | unit, which will allow programs that use floating-point |
| 315 | instructions to run. |
| 316 | |
| 317 | This is also useful to emulate missing (optional) instructions |
| 318 | such as fsqrt on cores that do have an FPU but do not implement |
| 319 | them (such as Freescale BookE). |
| 320 | |
| 321 | choice |
| 322 | prompt "Math emulation options" |
| 323 | default MATH_EMULATION_FULL |
| 324 | depends on MATH_EMULATION |
| 325 | |
| 326 | config MATH_EMULATION_FULL |
| 327 | bool "Emulate all the floating point instructions" |
| 328 | ---help--- |
| 329 | Select this option will enable the kernel to support to emulate |
| 330 | all the floating point instructions. If your SoC doesn't have |
| 331 | a FPU, you should select this. |
| 332 | |
| 333 | config MATH_EMULATION_HW_UNIMPLEMENTED |
| 334 | bool "Just emulate the FPU unimplemented instructions" |
| 335 | ---help--- |
| 336 | Select this if you know there does have a hardware FPU on your |
| 337 | SoC, but some floating point instructions are not implemented by that. |
| 338 | |
| 339 | endchoice |
| 340 | |
| 341 | config PPC_TRANSACTIONAL_MEM |
| 342 | bool "Transactional Memory support for POWERPC" |
| 343 | depends on PPC_BOOK3S_64 |
| 344 | depends on SMP |
| 345 | select ALTIVEC |
| 346 | select VSX |
| 347 | default n |
| 348 | ---help--- |
| 349 | Support user-mode Transactional Memory on POWERPC. |
| 350 | |
| 351 | config IOMMU_HELPER |
| 352 | def_bool PPC64 |
| 353 | |
| 354 | config SWIOTLB |
| 355 | bool "SWIOTLB support" |
| 356 | default n |
| 357 | select IOMMU_HELPER |
| 358 | ---help--- |
| 359 | Support for IO bounce buffering for systems without an IOMMU. |
| 360 | This allows us to DMA to the full physical address space on |
| 361 | platforms where the size of a physical address is larger |
| 362 | than the bus address. Not all platforms support this. |
| 363 | |
| 364 | config HOTPLUG_CPU |
| 365 | bool "Support for enabling/disabling CPUs" |
| 366 | depends on SMP && (PPC_PSERIES || \ |
| 367 | PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC)) |
| 368 | ---help--- |
| 369 | Say Y here to be able to disable and re-enable individual |
| 370 | CPUs at runtime on SMP machines. |
| 371 | |
| 372 | Say N if you are unsure. |
| 373 | |
| 374 | config ARCH_CPU_PROBE_RELEASE |
| 375 | def_bool y |
| 376 | depends on HOTPLUG_CPU |
| 377 | |
| 378 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 379 | def_bool y |
| 380 | |
| 381 | config ARCH_HAS_WALK_MEMORY |
| 382 | def_bool y |
| 383 | |
| 384 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 385 | def_bool y |
| 386 | |
| 387 | config PPC64_SUPPORTS_MEMORY_FAILURE |
| 388 | bool "Add support for memory hwpoison" |
| 389 | depends on PPC_BOOK3S_64 |
| 390 | default "y" if PPC_POWERNV |
| 391 | select ARCH_SUPPORTS_MEMORY_FAILURE |
| 392 | |
| 393 | config KEXEC |
| 394 | bool "kexec system call" |
| 395 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) |
| 396 | help |
| 397 | kexec is a system call that implements the ability to shutdown your |
| 398 | current kernel, and to start another kernel. It is like a reboot |
| 399 | but it is independent of the system firmware. And like a reboot |
| 400 | you can start any kernel with it, not just Linux. |
| 401 | |
| 402 | The name comes from the similarity to the exec system call. |
| 403 | |
| 404 | It is an ongoing process to be certain the hardware in a machine |
| 405 | is properly shutdown, so do not be surprised if this code does not |
| 406 | initially work for you. As of this writing the exact hardware |
| 407 | interface is strongly in flux, so no good recommendation can be |
| 408 | made. |
| 409 | |
| 410 | config CRASH_DUMP |
| 411 | bool "Build a kdump crash kernel" |
| 412 | depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) |
| 413 | select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
| 414 | help |
| 415 | Build a kernel suitable for use as a kdump capture kernel. |
| 416 | The same kernel binary can be used as production kernel and dump |
| 417 | capture kernel. |
| 418 | |
| 419 | config FA_DUMP |
| 420 | bool "Firmware-assisted dump" |
| 421 | depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC |
| 422 | help |
| 423 | A robust mechanism to get reliable kernel crash dump with |
| 424 | assistance from firmware. This approach does not use kexec, |
| 425 | instead firmware assists in booting the kdump kernel |
| 426 | while preserving memory contents. Firmware-assisted dump |
| 427 | is meant to be a kdump replacement offering robustness and |
| 428 | speed not possible without system firmware assistance. |
| 429 | |
| 430 | If unsure, say "N" |
| 431 | |
| 432 | config IRQ_ALL_CPUS |
| 433 | bool "Distribute interrupts on all CPUs by default" |
| 434 | depends on SMP |
| 435 | help |
| 436 | This option gives the kernel permission to distribute IRQs across |
| 437 | multiple CPUs. Saying N here will route all IRQs to the first |
| 438 | CPU. Generally saying Y is safe, although some problems have been |
| 439 | reported with SMP Power Macintoshes with this option enabled. |
| 440 | |
| 441 | config NUMA |
| 442 | bool "NUMA support" |
| 443 | depends on PPC64 |
| 444 | default y if SMP && PPC_PSERIES |
| 445 | |
| 446 | config NODES_SHIFT |
| 447 | int |
| 448 | default "8" if PPC64 |
| 449 | default "4" |
| 450 | depends on NEED_MULTIPLE_NODES |
| 451 | |
| 452 | config ARCH_SELECT_MEMORY_MODEL |
| 453 | def_bool y |
| 454 | depends on PPC64 |
| 455 | |
| 456 | config ARCH_FLATMEM_ENABLE |
| 457 | def_bool y |
| 458 | depends on (PPC64 && !NUMA) || PPC32 |
| 459 | |
| 460 | config ARCH_SPARSEMEM_ENABLE |
| 461 | def_bool y |
| 462 | depends on PPC64 |
| 463 | select SPARSEMEM_VMEMMAP_ENABLE |
| 464 | |
| 465 | config ARCH_SPARSEMEM_DEFAULT |
| 466 | def_bool y |
| 467 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
| 468 | |
| 469 | config SYS_SUPPORTS_HUGETLBFS |
| 470 | bool |
| 471 | |
| 472 | source "mm/Kconfig" |
| 473 | |
| 474 | config ARCH_MEMORY_PROBE |
| 475 | def_bool y |
| 476 | depends on MEMORY_HOTPLUG |
| 477 | |
| 478 | # Some NUMA nodes have memory ranges that span |
| 479 | # other nodes. Even though a pfn is valid and |
| 480 | # between a node's start and end pfns, it may not |
| 481 | # reside on that node. See memmap_init_zone() |
| 482 | # for details. |
| 483 | config NODES_SPAN_OTHER_NODES |
| 484 | def_bool y |
| 485 | depends on NEED_MULTIPLE_NODES |
| 486 | |
| 487 | config PPC_HAS_HASH_64K |
| 488 | bool |
| 489 | depends on PPC64 |
| 490 | default n |
| 491 | |
| 492 | config STDBINUTILS |
| 493 | bool "Using standard binutils settings" |
| 494 | depends on 44x |
| 495 | default y |
| 496 | help |
| 497 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. |
| 498 | Note, that kernel will be able to run only those applications, |
| 499 | which had been compiled using binutils later than 2.17.50.0.3 with |
| 500 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using |
| 501 | the older binutils, you can patch them with a trivial patch, which |
| 502 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. |
| 503 | |
| 504 | choice |
| 505 | prompt "Page size" |
| 506 | default PPC_4K_PAGES |
| 507 | help |
| 508 | Select the kernel logical page size. Increasing the page size |
| 509 | will reduce software overhead at each page boundary, allow |
| 510 | hardware prefetch mechanisms to be more effective, and allow |
| 511 | larger dma transfers increasing IO efficiency and reducing |
| 512 | overhead. However the utilization of memory will increase. |
| 513 | For example, each cached file will using a multiple of the |
| 514 | page size to hold its contents and the difference between the |
| 515 | end of file and the end of page is wasted. |
| 516 | |
| 517 | Some dedicated systems, such as software raid serving with |
| 518 | accelerated calculations, have shown significant increases. |
| 519 | |
| 520 | If you configure a 64 bit kernel for 64k pages but the |
| 521 | processor does not support them, then the kernel will simulate |
| 522 | them with 4k pages, loading them on demand, but with the |
| 523 | reduced software overhead and larger internal fragmentation. |
| 524 | For the 32 bit kernel, a large page option will not be offered |
| 525 | unless it is supported by the configured processor. |
| 526 | |
| 527 | If unsure, choose 4K_PAGES. |
| 528 | |
| 529 | config PPC_4K_PAGES |
| 530 | bool "4k page size" |
| 531 | |
| 532 | config PPC_16K_PAGES |
| 533 | bool "16k page size" if 44x |
| 534 | |
| 535 | config PPC_64K_PAGES |
| 536 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
| 537 | depends on !PPC_FSL_BOOK3E |
| 538 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
| 539 | |
| 540 | config PPC_256K_PAGES |
| 541 | bool "256k page size" if 44x |
| 542 | depends on !STDBINUTILS |
| 543 | help |
| 544 | Make the page size 256k. |
| 545 | |
| 546 | As the ELF standard only requires alignment to support page |
| 547 | sizes up to 64k, you will need to compile all of your user |
| 548 | space applications with a non-standard binutils settings |
| 549 | (see the STDBINUTILS description for details). |
| 550 | |
| 551 | Say N unless you know what you are doing. |
| 552 | |
| 553 | endchoice |
| 554 | |
| 555 | config FORCE_MAX_ZONEORDER |
| 556 | int "Maximum zone order" |
| 557 | range 9 64 if PPC64 && PPC_64K_PAGES |
| 558 | default "9" if PPC64 && PPC_64K_PAGES |
| 559 | range 13 64 if PPC64 && !PPC_64K_PAGES |
| 560 | default "13" if PPC64 && !PPC_64K_PAGES |
| 561 | range 9 64 if PPC32 && PPC_16K_PAGES |
| 562 | default "9" if PPC32 && PPC_16K_PAGES |
| 563 | range 7 64 if PPC32 && PPC_64K_PAGES |
| 564 | default "7" if PPC32 && PPC_64K_PAGES |
| 565 | range 5 64 if PPC32 && PPC_256K_PAGES |
| 566 | default "5" if PPC32 && PPC_256K_PAGES |
| 567 | range 11 64 |
| 568 | default "11" |
| 569 | help |
| 570 | The kernel memory allocator divides physically contiguous memory |
| 571 | blocks into "zones", where each zone is a power of two number of |
| 572 | pages. This option selects the largest power of two that the kernel |
| 573 | keeps in the memory allocator. If you need to allocate very large |
| 574 | blocks of physically contiguous memory, then you may need to |
| 575 | increase this value. |
| 576 | |
| 577 | This config option is actually maximum order plus one. For example, |
| 578 | a value of 11 means that the largest free memory block is 2^10 pages. |
| 579 | |
| 580 | The page size is not necessarily 4KB. For example, on 64-bit |
| 581 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
| 582 | this in mind when choosing a value for this option. |
| 583 | |
| 584 | config PPC_SUBPAGE_PROT |
| 585 | bool "Support setting protections for 4k subpages" |
| 586 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
| 587 | help |
| 588 | This option adds support for a system call to allow user programs |
| 589 | to set access permissions (read/write, readonly, or no access) |
| 590 | on the 4k subpages of each 64k page. |
| 591 | |
| 592 | config SCHED_SMT |
| 593 | bool "SMT (Hyperthreading) scheduler support" |
| 594 | depends on PPC64 && SMP |
| 595 | help |
| 596 | SMT scheduler support improves the CPU scheduler's decision making |
| 597 | when dealing with POWER5 cpus at a cost of slightly increased |
| 598 | overhead in some places. If unsure say N here. |
| 599 | |
| 600 | config PPC_DENORMALISATION |
| 601 | bool "PowerPC denormalisation exception handling" |
| 602 | depends on PPC_BOOK3S_64 |
| 603 | default "y" if PPC_POWERNV |
| 604 | ---help--- |
| 605 | Add support for handling denormalisation of single precision |
| 606 | values. Useful for bare metal only. If unsure say Y here. |
| 607 | |
| 608 | config CMDLINE_BOOL |
| 609 | bool "Default bootloader kernel arguments" |
| 610 | |
| 611 | config CMDLINE |
| 612 | string "Initial kernel command string" |
| 613 | depends on CMDLINE_BOOL |
| 614 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" |
| 615 | help |
| 616 | On some platforms, there is currently no way for the boot loader to |
| 617 | pass arguments to the kernel. For these platforms, you can supply |
| 618 | some command-line options at build time by entering them here. In |
| 619 | most cases you will need to specify the root device here. |
| 620 | |
| 621 | config EXTRA_TARGETS |
| 622 | string "Additional default image types" |
| 623 | help |
| 624 | List additional targets to be built by the bootwrapper here (separated |
| 625 | by spaces). This is useful for targets that depend of device tree |
| 626 | files in the .dts directory. |
| 627 | |
| 628 | Targets in this list will be build as part of the default build |
| 629 | target, or when the user does a 'make zImage' or a |
| 630 | 'make zImage.initrd'. |
| 631 | |
| 632 | If unsure, leave blank |
| 633 | |
| 634 | config ARCH_WANTS_FREEZER_CONTROL |
| 635 | def_bool y |
| 636 | depends on ADB_PMU |
| 637 | |
| 638 | source kernel/power/Kconfig |
| 639 | |
| 640 | config SECCOMP |
| 641 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 642 | depends on PROC_FS |
| 643 | default y |
| 644 | help |
| 645 | This kernel feature is useful for number crunching applications |
| 646 | that may need to compute untrusted bytecode during their |
| 647 | execution. By using pipes or other transports made available to |
| 648 | the process as file descriptors supporting the read/write |
| 649 | syscalls, it's possible to isolate those applications in |
| 650 | their own address space using seccomp. Once seccomp is |
| 651 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 652 | and the task is only allowed to execute a few safe syscalls |
| 653 | defined by each seccomp mode. |
| 654 | |
| 655 | If unsure, say Y. Only embedded should say N here. |
| 656 | |
| 657 | endmenu |
| 658 | |
| 659 | config ISA_DMA_API |
| 660 | bool |
| 661 | default PCI |
| 662 | |
| 663 | menu "Bus options" |
| 664 | |
| 665 | config ISA |
| 666 | bool "Support for ISA-bus hardware" |
| 667 | depends on PPC_CHRP |
| 668 | select PPC_I8259 |
| 669 | help |
| 670 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 671 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 672 | inside your box. If you have an Apple machine, say N here; if you |
| 673 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
| 674 | embedded board, consult your board documentation. |
| 675 | |
| 676 | config ZONE_DMA |
| 677 | bool |
| 678 | default y |
| 679 | |
| 680 | config NEED_DMA_MAP_STATE |
| 681 | def_bool (PPC64 || NOT_COHERENT_CACHE) |
| 682 | |
| 683 | config NEED_SG_DMA_LENGTH |
| 684 | def_bool y |
| 685 | |
| 686 | config GENERIC_ISA_DMA |
| 687 | bool |
| 688 | depends on ISA_DMA_API |
| 689 | default y |
| 690 | |
| 691 | config PPC_INDIRECT_PCI |
| 692 | bool |
| 693 | depends on PCI |
| 694 | default y if 40x || 44x |
| 695 | default n |
| 696 | |
| 697 | config EISA |
| 698 | bool |
| 699 | |
| 700 | config SBUS |
| 701 | bool |
| 702 | |
| 703 | config FSL_SOC |
| 704 | bool |
| 705 | |
| 706 | config FSL_PCI |
| 707 | bool |
| 708 | select PPC_INDIRECT_PCI |
| 709 | select PCI_QUIRKS |
| 710 | |
| 711 | config FSL_PMC |
| 712 | bool |
| 713 | default y |
| 714 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
| 715 | help |
| 716 | Freescale MPC85xx/MPC86xx power management controller support |
| 717 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
| 718 | |
| 719 | config PPC4xx_CPM |
| 720 | bool |
| 721 | default y |
| 722 | depends on SUSPEND && (44x || 40x) |
| 723 | help |
| 724 | PPC4xx Clock Power Management (CPM) support (suspend/resume). |
| 725 | It also enables support for two different idle states (idle-wait |
| 726 | and idle-doze). |
| 727 | |
| 728 | config 4xx_SOC |
| 729 | bool |
| 730 | |
| 731 | config FSL_LBC |
| 732 | bool "Freescale Local Bus support" |
| 733 | depends on FSL_SOC |
| 734 | help |
| 735 | Enables reporting of errors from the Freescale local bus |
| 736 | controller. Also contains some common code used by |
| 737 | drivers for specific local bus peripherals. |
| 738 | |
| 739 | config FSL_IFC |
| 740 | bool |
| 741 | depends on FSL_SOC |
| 742 | |
| 743 | config FSL_GTM |
| 744 | bool |
| 745 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
| 746 | help |
| 747 | Freescale General-purpose Timers support |
| 748 | |
| 749 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
| 750 | config MCA |
| 751 | bool |
| 752 | |
| 753 | # Platforms that what PCI turned unconditionally just do select PCI |
| 754 | # in their config node. Platforms that want to choose at config |
| 755 | # time should select PPC_PCI_CHOICE |
| 756 | config PPC_PCI_CHOICE |
| 757 | bool |
| 758 | |
| 759 | config PCI |
| 760 | bool "PCI support" if PPC_PCI_CHOICE |
| 761 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ |
| 762 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
| 763 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
| 764 | select GENERIC_PCI_IOMAP |
| 765 | help |
| 766 | Find out whether your system includes a PCI bus. PCI is the name of |
| 767 | a bus system, i.e. the way the CPU talks to the other stuff inside |
| 768 | your box. If you say Y here, the kernel will include drivers and |
| 769 | infrastructure code to support PCI bus devices. |
| 770 | |
| 771 | config PCI_DOMAINS |
| 772 | def_bool PCI |
| 773 | |
| 774 | config PCI_SYSCALL |
| 775 | def_bool PCI |
| 776 | |
| 777 | config PCI_QSPAN |
| 778 | bool "QSpan PCI" |
| 779 | depends on !4xx && !CPM2 && 8xx |
| 780 | select PPC_I8259 |
| 781 | help |
| 782 | Say Y here if you have a system based on a Motorola 8xx-series |
| 783 | embedded processor with a QSPAN PCI interface, otherwise say N. |
| 784 | |
| 785 | config PCI_8260 |
| 786 | bool |
| 787 | depends on PCI && 8260 |
| 788 | select PPC_INDIRECT_PCI |
| 789 | default y |
| 790 | |
| 791 | source "drivers/pci/pcie/Kconfig" |
| 792 | |
| 793 | source "drivers/pci/Kconfig" |
| 794 | |
| 795 | source "drivers/pcmcia/Kconfig" |
| 796 | |
| 797 | source "drivers/pci/hotplug/Kconfig" |
| 798 | |
| 799 | config HAS_RAPIDIO |
| 800 | bool |
| 801 | default n |
| 802 | |
| 803 | config RAPIDIO |
| 804 | tristate "RapidIO support" |
| 805 | depends on HAS_RAPIDIO || PCI |
| 806 | help |
| 807 | If you say Y here, the kernel will include drivers and |
| 808 | infrastructure code to support RapidIO interconnect devices. |
| 809 | |
| 810 | config FSL_RIO |
| 811 | bool "Freescale Embedded SRIO Controller support" |
| 812 | depends on RAPIDIO = y && HAS_RAPIDIO |
| 813 | default "n" |
| 814 | ---help--- |
| 815 | Include support for RapidIO controller on Freescale embedded |
| 816 | processors (MPC8548, MPC8641, etc). |
| 817 | |
| 818 | source "drivers/rapidio/Kconfig" |
| 819 | |
| 820 | endmenu |
| 821 | |
| 822 | config NONSTATIC_KERNEL |
| 823 | bool |
| 824 | default n |
| 825 | |
| 826 | menu "Advanced setup" |
| 827 | depends on PPC32 |
| 828 | |
| 829 | config ADVANCED_OPTIONS |
| 830 | bool "Prompt for advanced kernel configuration options" |
| 831 | help |
| 832 | This option will enable prompting for a variety of advanced kernel |
| 833 | configuration options. These options can cause the kernel to not |
| 834 | work if they are set incorrectly, but can be used to optimize certain |
| 835 | aspects of kernel memory management. |
| 836 | |
| 837 | Unless you know what you are doing, say N here. |
| 838 | |
| 839 | comment "Default settings for advanced configuration options are used" |
| 840 | depends on !ADVANCED_OPTIONS |
| 841 | |
| 842 | config LOWMEM_SIZE_BOOL |
| 843 | bool "Set maximum low memory" |
| 844 | depends on ADVANCED_OPTIONS |
| 845 | help |
| 846 | This option allows you to set the maximum amount of memory which |
| 847 | will be used as "low memory", that is, memory which the kernel can |
| 848 | access directly, without having to set up a kernel virtual mapping. |
| 849 | This can be useful in optimizing the layout of kernel virtual |
| 850 | memory. |
| 851 | |
| 852 | Say N here unless you know what you are doing. |
| 853 | |
| 854 | config LOWMEM_SIZE |
| 855 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
| 856 | default "0x30000000" |
| 857 | |
| 858 | config LOWMEM_CAM_NUM_BOOL |
| 859 | bool "Set number of CAMs to use to map low memory" |
| 860 | depends on ADVANCED_OPTIONS && FSL_BOOKE |
| 861 | help |
| 862 | This option allows you to set the maximum number of CAM slots that |
| 863 | will be used to map low memory. There are a limited number of slots |
| 864 | available and even more limited number that will fit in the L1 MMU. |
| 865 | However, using more entries will allow mapping more low memory. This |
| 866 | can be useful in optimizing the layout of kernel virtual memory. |
| 867 | |
| 868 | Say N here unless you know what you are doing. |
| 869 | |
| 870 | config LOWMEM_CAM_NUM |
| 871 | depends on FSL_BOOKE |
| 872 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
| 873 | default 3 |
| 874 | |
| 875 | config DYNAMIC_MEMSTART |
| 876 | bool "Enable page aligned dynamic load address for kernel" |
| 877 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) |
| 878 | select NONSTATIC_KERNEL |
| 879 | help |
| 880 | This option enables the kernel to be loaded at any page aligned |
| 881 | physical address. The kernel creates a mapping from KERNELBASE to |
| 882 | the address where the kernel is loaded. The page size here implies |
| 883 | the TLB page size of the mapping for kernel on the particular platform. |
| 884 | Please refer to the init code for finding the TLB page size. |
| 885 | |
| 886 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
| 887 | kernel image, where the only restriction is the page aligned kernel |
| 888 | load address. When this option is enabled, the compile time physical |
| 889 | address CONFIG_PHYSICAL_START is ignored. |
| 890 | |
| 891 | This option is overridden by CONFIG_RELOCATABLE |
| 892 | |
| 893 | config RELOCATABLE |
| 894 | bool "Build a relocatable kernel" |
| 895 | depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE) |
| 896 | select NONSTATIC_KERNEL |
| 897 | help |
| 898 | This builds a kernel image that is capable of running at the |
| 899 | location the kernel is loaded at, without any alignment restrictions. |
| 900 | This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. |
| 901 | |
| 902 | One use is for the kexec on panic case where the recovery kernel |
| 903 | must live at a different physical address than the primary |
| 904 | kernel. |
| 905 | |
| 906 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 907 | it has been loaded at and the compile time physical addresses |
| 908 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
| 909 | setting can still be useful to bootwrappers that need to know the |
| 910 | load address of the kernel (eg. u-boot/mkimage). |
| 911 | |
| 912 | config RELOCATABLE_PPC32 |
| 913 | def_bool y |
| 914 | depends on PPC32 && RELOCATABLE |
| 915 | |
| 916 | config PAGE_OFFSET_BOOL |
| 917 | bool "Set custom page offset address" |
| 918 | depends on ADVANCED_OPTIONS |
| 919 | help |
| 920 | This option allows you to set the kernel virtual address at which |
| 921 | the kernel will map low memory. This can be useful in optimizing |
| 922 | the virtual memory layout of the system. |
| 923 | |
| 924 | Say N here unless you know what you are doing. |
| 925 | |
| 926 | config PAGE_OFFSET |
| 927 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
| 928 | default "0xc0000000" |
| 929 | |
| 930 | config KERNEL_START_BOOL |
| 931 | bool "Set custom kernel base address" |
| 932 | depends on ADVANCED_OPTIONS |
| 933 | help |
| 934 | This option allows you to set the kernel virtual address at which |
| 935 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
| 936 | however there are times (like kdump) that one might not want them |
| 937 | to be the same. |
| 938 | |
| 939 | Say N here unless you know what you are doing. |
| 940 | |
| 941 | config KERNEL_START |
| 942 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
| 943 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
| 944 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
| 945 | default "0xc0000000" |
| 946 | |
| 947 | config PHYSICAL_START_BOOL |
| 948 | bool "Set physical address where the kernel is loaded" |
| 949 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
| 950 | help |
| 951 | This gives the physical address where the kernel is loaded. |
| 952 | |
| 953 | Say N here unless you know what you are doing. |
| 954 | |
| 955 | config PHYSICAL_START |
| 956 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
| 957 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL |
| 958 | default "0x00000000" |
| 959 | |
| 960 | config PHYSICAL_ALIGN |
| 961 | hex |
| 962 | default "0x04000000" if FSL_BOOKE |
| 963 | help |
| 964 | This value puts the alignment restrictions on physical address |
| 965 | where kernel is loaded and run from. Kernel is compiled for an |
| 966 | address which meets above alignment restriction. |
| 967 | |
| 968 | config TASK_SIZE_BOOL |
| 969 | bool "Set custom user task size" |
| 970 | depends on ADVANCED_OPTIONS |
| 971 | help |
| 972 | This option allows you to set the amount of virtual address space |
| 973 | allocated to user tasks. This can be useful in optimizing the |
| 974 | virtual memory layout of the system. |
| 975 | |
| 976 | Say N here unless you know what you are doing. |
| 977 | |
| 978 | config TASK_SIZE |
| 979 | hex "Size of user task space" if TASK_SIZE_BOOL |
| 980 | default "0x80000000" if PPC_8xx |
| 981 | default "0xc0000000" |
| 982 | |
| 983 | config CONSISTENT_SIZE_BOOL |
| 984 | bool "Set custom consistent memory pool size" |
| 985 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE |
| 986 | help |
| 987 | This option allows you to set the size of the |
| 988 | consistent memory pool. This pool of virtual memory |
| 989 | is used to make consistent memory allocations. |
| 990 | |
| 991 | config CONSISTENT_SIZE |
| 992 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL |
| 993 | default "0x00200000" if NOT_COHERENT_CACHE |
| 994 | |
| 995 | config PIN_TLB |
| 996 | bool "Pinned Kernel TLBs (860 ONLY)" |
| 997 | depends on ADVANCED_OPTIONS && 8xx |
| 998 | endmenu |
| 999 | |
| 1000 | if PPC64 |
| 1001 | config RELOCATABLE |
| 1002 | bool "Build a relocatable kernel" |
| 1003 | select NONSTATIC_KERNEL |
| 1004 | help |
| 1005 | This builds a kernel image that is capable of running anywhere |
| 1006 | in the RMA (real memory area) at any 16k-aligned base address. |
| 1007 | The kernel is linked as a position-independent executable (PIE) |
| 1008 | and contains dynamic relocations which are processed early |
| 1009 | in the bootup process. |
| 1010 | |
| 1011 | One use is for the kexec on panic case where the recovery kernel |
| 1012 | must live at a different physical address than the primary |
| 1013 | kernel. |
| 1014 | |
| 1015 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
| 1016 | config PAGE_OFFSET |
| 1017 | hex |
| 1018 | default "0xc000000000000000" |
| 1019 | config KERNEL_START |
| 1020 | hex |
| 1021 | default "0xc000000000000000" |
| 1022 | config PHYSICAL_START |
| 1023 | hex |
| 1024 | default "0x00000000" |
| 1025 | endif |
| 1026 | |
| 1027 | config ARCH_RANDOM |
| 1028 | def_bool n |
| 1029 | |
| 1030 | source "net/Kconfig" |
| 1031 | |
| 1032 | source "drivers/Kconfig" |
| 1033 | |
| 1034 | source "fs/Kconfig" |
| 1035 | |
| 1036 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
| 1037 | |
| 1038 | source "lib/Kconfig" |
| 1039 | |
| 1040 | source "arch/powerpc/Kconfig.debug" |
| 1041 | |
| 1042 | source "security/Kconfig" |
| 1043 | |
| 1044 | config KEYS_COMPAT |
| 1045 | bool |
| 1046 | depends on COMPAT && KEYS |
| 1047 | default y |
| 1048 | |
| 1049 | source "crypto/Kconfig" |
| 1050 | |
| 1051 | config PPC_LIB_RHEAP |
| 1052 | bool |
| 1053 | |
| 1054 | source "arch/powerpc/kvm/Kconfig" |