| 1 | # For a description of the syntax of this configuration file, |
| 2 | # see Documentation/kbuild/kconfig-language.txt. |
| 3 | # |
| 4 | |
| 5 | mainmenu "Linux/PowerPC Kernel Configuration" |
| 6 | |
| 7 | source "arch/powerpc/platforms/Kconfig.cputype" |
| 8 | |
| 9 | config PPC32 |
| 10 | bool |
| 11 | default y if !PPC64 |
| 12 | |
| 13 | config 64BIT |
| 14 | bool |
| 15 | default y if PPC64 |
| 16 | |
| 17 | config WORD_SIZE |
| 18 | int |
| 19 | default 64 if PPC64 |
| 20 | default 32 if !PPC64 |
| 21 | |
| 22 | config ARCH_PHYS_ADDR_T_64BIT |
| 23 | def_bool PPC64 || PHYS_64BIT |
| 24 | |
| 25 | config MMU |
| 26 | bool |
| 27 | default y |
| 28 | |
| 29 | config GENERIC_CMOS_UPDATE |
| 30 | def_bool y |
| 31 | |
| 32 | config GENERIC_TIME_VSYSCALL |
| 33 | def_bool y |
| 34 | |
| 35 | config GENERIC_CLOCKEVENTS |
| 36 | def_bool y |
| 37 | |
| 38 | config GENERIC_HARDIRQS |
| 39 | bool |
| 40 | default y |
| 41 | |
| 42 | config GENERIC_HARDIRQS_NO__DO_IRQ |
| 43 | bool |
| 44 | default y |
| 45 | |
| 46 | config HAVE_SETUP_PER_CPU_AREA |
| 47 | def_bool PPC64 |
| 48 | |
| 49 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
| 50 | def_bool PPC64 |
| 51 | |
| 52 | config IRQ_PER_CPU |
| 53 | bool |
| 54 | default y |
| 55 | |
| 56 | config NR_IRQS |
| 57 | int "Number of virtual interrupt numbers" |
| 58 | range 32 32768 |
| 59 | default "512" |
| 60 | help |
| 61 | This defines the number of virtual interrupt numbers the kernel |
| 62 | can manage. Virtual interrupt numbers are what you see in |
| 63 | /proc/interrupts. If you configure your system to have too few, |
| 64 | drivers will fail to load or worse - handle with care. |
| 65 | |
| 66 | config STACKTRACE_SUPPORT |
| 67 | bool |
| 68 | default y |
| 69 | |
| 70 | config HAVE_LATENCYTOP_SUPPORT |
| 71 | def_bool y |
| 72 | |
| 73 | config TRACE_IRQFLAGS_SUPPORT |
| 74 | bool |
| 75 | default y |
| 76 | |
| 77 | config LOCKDEP_SUPPORT |
| 78 | bool |
| 79 | default y |
| 80 | |
| 81 | config RWSEM_GENERIC_SPINLOCK |
| 82 | bool |
| 83 | |
| 84 | config RWSEM_XCHGADD_ALGORITHM |
| 85 | bool |
| 86 | default y |
| 87 | |
| 88 | config GENERIC_LOCKBREAK |
| 89 | bool |
| 90 | default y |
| 91 | depends on SMP && PREEMPT |
| 92 | |
| 93 | config ARCH_HAS_ILOG2_U32 |
| 94 | bool |
| 95 | default y |
| 96 | |
| 97 | config ARCH_HAS_ILOG2_U64 |
| 98 | bool |
| 99 | default y if 64BIT |
| 100 | |
| 101 | config GENERIC_HWEIGHT |
| 102 | bool |
| 103 | default y |
| 104 | |
| 105 | config GENERIC_FIND_NEXT_BIT |
| 106 | bool |
| 107 | default y |
| 108 | |
| 109 | config GENERIC_GPIO |
| 110 | bool |
| 111 | help |
| 112 | Generic GPIO API support |
| 113 | |
| 114 | config ARCH_NO_VIRT_TO_BUS |
| 115 | def_bool PPC64 |
| 116 | |
| 117 | config PPC |
| 118 | bool |
| 119 | default y |
| 120 | select OF |
| 121 | select OF_FLATTREE |
| 122 | select HAVE_FTRACE_MCOUNT_RECORD |
| 123 | select HAVE_DYNAMIC_FTRACE |
| 124 | select HAVE_FUNCTION_TRACER |
| 125 | select HAVE_FUNCTION_GRAPH_TRACER |
| 126 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 127 | select HAVE_IDE |
| 128 | select HAVE_IOREMAP_PROT |
| 129 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
| 130 | select HAVE_KPROBES |
| 131 | select HAVE_ARCH_KGDB |
| 132 | select HAVE_KRETPROBES |
| 133 | select HAVE_ARCH_TRACEHOOK |
| 134 | select HAVE_MEMBLOCK |
| 135 | select HAVE_DMA_ATTRS |
| 136 | select HAVE_DMA_API_DEBUG |
| 137 | select USE_GENERIC_SMP_HELPERS if SMP |
| 138 | select HAVE_OPROFILE |
| 139 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
| 140 | select GENERIC_ATOMIC64 if PPC32 |
| 141 | select HAVE_PERF_EVENTS |
| 142 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 143 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 |
| 144 | |
| 145 | config EARLY_PRINTK |
| 146 | bool |
| 147 | default y |
| 148 | |
| 149 | config COMPAT |
| 150 | bool |
| 151 | default y if PPC64 |
| 152 | select COMPAT_BINFMT_ELF |
| 153 | |
| 154 | config SYSVIPC_COMPAT |
| 155 | bool |
| 156 | depends on COMPAT && SYSVIPC |
| 157 | default y |
| 158 | |
| 159 | # All PPC32s use generic nvram driver through ppc_md |
| 160 | config GENERIC_NVRAM |
| 161 | bool |
| 162 | default y if PPC32 |
| 163 | |
| 164 | config SCHED_OMIT_FRAME_POINTER |
| 165 | bool |
| 166 | default y |
| 167 | |
| 168 | config ARCH_MAY_HAVE_PC_FDC |
| 169 | bool |
| 170 | default !PPC_PSERIES || PCI |
| 171 | |
| 172 | config PPC_OF |
| 173 | def_bool y |
| 174 | |
| 175 | config PPC_UDBG_16550 |
| 176 | bool |
| 177 | default n |
| 178 | |
| 179 | config GENERIC_TBSYNC |
| 180 | bool |
| 181 | default y if PPC32 && SMP |
| 182 | default n |
| 183 | |
| 184 | config AUDIT_ARCH |
| 185 | bool |
| 186 | default y |
| 187 | |
| 188 | config GENERIC_BUG |
| 189 | bool |
| 190 | default y |
| 191 | depends on BUG |
| 192 | |
| 193 | config SYS_SUPPORTS_APM_EMULATION |
| 194 | default y if PMAC_APM_EMU |
| 195 | bool |
| 196 | |
| 197 | config DEFAULT_UIMAGE |
| 198 | bool |
| 199 | help |
| 200 | Used to allow a board to specify it wants a uImage built by default |
| 201 | default n |
| 202 | |
| 203 | config REDBOOT |
| 204 | bool |
| 205 | |
| 206 | config ARCH_HIBERNATION_POSSIBLE |
| 207 | bool |
| 208 | default y |
| 209 | |
| 210 | config ARCH_SUSPEND_POSSIBLE |
| 211 | def_bool y |
| 212 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
| 213 | PPC_85xx || PPC_86xx || PPC_PSERIES |
| 214 | |
| 215 | config PPC_DCR_NATIVE |
| 216 | bool |
| 217 | default n |
| 218 | |
| 219 | config PPC_DCR_MMIO |
| 220 | bool |
| 221 | default n |
| 222 | |
| 223 | config PPC_DCR |
| 224 | bool |
| 225 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
| 226 | default y |
| 227 | |
| 228 | config PPC_OF_PLATFORM_PCI |
| 229 | bool |
| 230 | depends on PCI |
| 231 | depends on PPC64 # not supported on 32 bits yet |
| 232 | default n |
| 233 | |
| 234 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 235 | def_bool y |
| 236 | |
| 237 | config PPC_ADV_DEBUG_REGS |
| 238 | bool |
| 239 | depends on 40x || BOOKE |
| 240 | default y |
| 241 | |
| 242 | config PPC_ADV_DEBUG_IACS |
| 243 | int |
| 244 | depends on PPC_ADV_DEBUG_REGS |
| 245 | default 4 if 44x |
| 246 | default 2 |
| 247 | |
| 248 | config PPC_ADV_DEBUG_DACS |
| 249 | int |
| 250 | depends on PPC_ADV_DEBUG_REGS |
| 251 | default 2 |
| 252 | |
| 253 | config PPC_ADV_DEBUG_DVCS |
| 254 | int |
| 255 | depends on PPC_ADV_DEBUG_REGS |
| 256 | default 2 if 44x |
| 257 | default 0 |
| 258 | |
| 259 | config PPC_ADV_DEBUG_DAC_RANGE |
| 260 | bool |
| 261 | depends on PPC_ADV_DEBUG_REGS && 44x |
| 262 | default y |
| 263 | |
| 264 | source "init/Kconfig" |
| 265 | |
| 266 | source "kernel/Kconfig.freezer" |
| 267 | |
| 268 | source "arch/powerpc/sysdev/Kconfig" |
| 269 | source "arch/powerpc/platforms/Kconfig" |
| 270 | |
| 271 | menu "Kernel options" |
| 272 | |
| 273 | config HIGHMEM |
| 274 | bool "High memory support" |
| 275 | depends on PPC32 |
| 276 | |
| 277 | source kernel/time/Kconfig |
| 278 | source kernel/Kconfig.hz |
| 279 | source kernel/Kconfig.preempt |
| 280 | source "fs/Kconfig.binfmt" |
| 281 | |
| 282 | config HUGETLB_PAGE_SIZE_VARIABLE |
| 283 | bool |
| 284 | depends on HUGETLB_PAGE |
| 285 | default y |
| 286 | |
| 287 | config MATH_EMULATION |
| 288 | bool "Math emulation" |
| 289 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
| 290 | ---help--- |
| 291 | Some PowerPC chips designed for embedded applications do not have |
| 292 | a floating-point unit and therefore do not implement the |
| 293 | floating-point instructions in the PowerPC instruction set. If you |
| 294 | say Y here, the kernel will include code to emulate a floating-point |
| 295 | unit, which will allow programs that use floating-point |
| 296 | instructions to run. |
| 297 | |
| 298 | config 8XX_MINIMAL_FPEMU |
| 299 | bool "Minimal math emulation for 8xx" |
| 300 | depends on 8xx && !MATH_EMULATION |
| 301 | help |
| 302 | Older arch/ppc kernels still emulated a few floating point |
| 303 | instructions such as load and store, even when full math |
| 304 | emulation is disabled. Say "Y" here if you want to preserve |
| 305 | this behavior. |
| 306 | |
| 307 | It is recommended that you build a soft-float userspace instead. |
| 308 | |
| 309 | config IOMMU_HELPER |
| 310 | def_bool PPC64 |
| 311 | |
| 312 | config SWIOTLB |
| 313 | bool "SWIOTLB support" |
| 314 | default n |
| 315 | select IOMMU_HELPER |
| 316 | ---help--- |
| 317 | Support for IO bounce buffering for systems without an IOMMU. |
| 318 | This allows us to DMA to the full physical address space on |
| 319 | platforms where the size of a physical address is larger |
| 320 | than the bus address. Not all platforms support this. |
| 321 | |
| 322 | config HOTPLUG_CPU |
| 323 | bool "Support for enabling/disabling CPUs" |
| 324 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) |
| 325 | ---help--- |
| 326 | Say Y here to be able to disable and re-enable individual |
| 327 | CPUs at runtime on SMP machines. |
| 328 | |
| 329 | Say N if you are unsure. |
| 330 | |
| 331 | config ARCH_CPU_PROBE_RELEASE |
| 332 | def_bool y |
| 333 | depends on HOTPLUG_CPU |
| 334 | |
| 335 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 336 | def_bool y |
| 337 | |
| 338 | config ARCH_HAS_WALK_MEMORY |
| 339 | def_bool y |
| 340 | |
| 341 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 342 | def_bool y |
| 343 | |
| 344 | config KEXEC |
| 345 | bool "kexec system call (EXPERIMENTAL)" |
| 346 | depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL |
| 347 | help |
| 348 | kexec is a system call that implements the ability to shutdown your |
| 349 | current kernel, and to start another kernel. It is like a reboot |
| 350 | but it is independent of the system firmware. And like a reboot |
| 351 | you can start any kernel with it, not just Linux. |
| 352 | |
| 353 | The name comes from the similarity to the exec system call. |
| 354 | |
| 355 | It is an ongoing process to be certain the hardware in a machine |
| 356 | is properly shutdown, so do not be surprised if this code does not |
| 357 | initially work for you. It may help to enable device hotplugging |
| 358 | support. As of this writing the exact hardware interface is |
| 359 | strongly in flux, so no good recommendation can be made. |
| 360 | |
| 361 | config CRASH_DUMP |
| 362 | bool "Build a kdump crash kernel" |
| 363 | depends on PPC64 || 6xx || FSL_BOOKE |
| 364 | select RELOCATABLE if PPC64 || FSL_BOOKE |
| 365 | help |
| 366 | Build a kernel suitable for use as a kdump capture kernel. |
| 367 | The same kernel binary can be used as production kernel and dump |
| 368 | capture kernel. |
| 369 | |
| 370 | config PHYP_DUMP |
| 371 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" |
| 372 | depends on PPC_PSERIES && EXPERIMENTAL |
| 373 | help |
| 374 | Hypervisor-assisted dump is meant to be a kdump replacement |
| 375 | offering robustness and speed not possible without system |
| 376 | hypervisor assistance. |
| 377 | |
| 378 | If unsure, say "N" |
| 379 | |
| 380 | config PPCBUG_NVRAM |
| 381 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC |
| 382 | default y if PPC_PREP |
| 383 | |
| 384 | config IRQ_ALL_CPUS |
| 385 | bool "Distribute interrupts on all CPUs by default" |
| 386 | depends on SMP && !MV64360 |
| 387 | help |
| 388 | This option gives the kernel permission to distribute IRQs across |
| 389 | multiple CPUs. Saying N here will route all IRQs to the first |
| 390 | CPU. Generally saying Y is safe, although some problems have been |
| 391 | reported with SMP Power Macintoshes with this option enabled. |
| 392 | |
| 393 | config SPARSE_IRQ |
| 394 | bool "Support sparse irq numbering" |
| 395 | default n |
| 396 | help |
| 397 | This enables support for sparse irqs. This is useful for distro |
| 398 | kernels that want to define a high CONFIG_NR_CPUS value but still |
| 399 | want to have low kernel memory footprint on smaller machines. |
| 400 | |
| 401 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread |
| 402 | out the irq_desc[] array in a more NUMA-friendly way. ) |
| 403 | |
| 404 | If you don't know what to do here, say N. |
| 405 | |
| 406 | config NUMA |
| 407 | bool "NUMA support" |
| 408 | depends on PPC64 |
| 409 | default y if SMP && PPC_PSERIES |
| 410 | |
| 411 | config NODES_SHIFT |
| 412 | int |
| 413 | default "8" if PPC64 |
| 414 | default "4" |
| 415 | depends on NEED_MULTIPLE_NODES |
| 416 | |
| 417 | config MAX_ACTIVE_REGIONS |
| 418 | int |
| 419 | default "256" if PPC64 |
| 420 | default "32" |
| 421 | |
| 422 | config ARCH_SELECT_MEMORY_MODEL |
| 423 | def_bool y |
| 424 | depends on PPC64 |
| 425 | |
| 426 | config ARCH_FLATMEM_ENABLE |
| 427 | def_bool y |
| 428 | depends on (PPC64 && !NUMA) || PPC32 |
| 429 | |
| 430 | config ARCH_SPARSEMEM_ENABLE |
| 431 | def_bool y |
| 432 | depends on PPC64 |
| 433 | select SPARSEMEM_VMEMMAP_ENABLE |
| 434 | |
| 435 | config ARCH_SPARSEMEM_DEFAULT |
| 436 | def_bool y |
| 437 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
| 438 | |
| 439 | config ARCH_POPULATES_NODE_MAP |
| 440 | def_bool y |
| 441 | |
| 442 | config SYS_SUPPORTS_HUGETLBFS |
| 443 | def_bool y |
| 444 | depends on PPC_BOOK3S_64 |
| 445 | |
| 446 | source "mm/Kconfig" |
| 447 | |
| 448 | config ARCH_MEMORY_PROBE |
| 449 | def_bool y |
| 450 | depends on MEMORY_HOTPLUG |
| 451 | |
| 452 | # Some NUMA nodes have memory ranges that span |
| 453 | # other nodes. Even though a pfn is valid and |
| 454 | # between a node's start and end pfns, it may not |
| 455 | # reside on that node. See memmap_init_zone() |
| 456 | # for details. |
| 457 | config NODES_SPAN_OTHER_NODES |
| 458 | def_bool y |
| 459 | depends on NEED_MULTIPLE_NODES |
| 460 | |
| 461 | config PPC_HAS_HASH_64K |
| 462 | bool |
| 463 | depends on PPC64 |
| 464 | default n |
| 465 | |
| 466 | config STDBINUTILS |
| 467 | bool "Using standard binutils settings" |
| 468 | depends on 44x |
| 469 | default y |
| 470 | help |
| 471 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. |
| 472 | Note, that kernel will be able to run only those applications, |
| 473 | which had been compiled using binutils later than 2.17.50.0.3 with |
| 474 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using |
| 475 | the older binutils, you can patch them with a trivial patch, which |
| 476 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. |
| 477 | |
| 478 | choice |
| 479 | prompt "Page size" |
| 480 | default PPC_4K_PAGES |
| 481 | help |
| 482 | Select the kernel logical page size. Increasing the page size |
| 483 | will reduce software overhead at each page boundary, allow |
| 484 | hardware prefetch mechanisms to be more effective, and allow |
| 485 | larger dma transfers increasing IO efficiency and reducing |
| 486 | overhead. However the utilization of memory will increase. |
| 487 | For example, each cached file will using a multiple of the |
| 488 | page size to hold its contents and the difference between the |
| 489 | end of file and the end of page is wasted. |
| 490 | |
| 491 | Some dedicated systems, such as software raid serving with |
| 492 | accelerated calculations, have shown significant increases. |
| 493 | |
| 494 | If you configure a 64 bit kernel for 64k pages but the |
| 495 | processor does not support them, then the kernel will simulate |
| 496 | them with 4k pages, loading them on demand, but with the |
| 497 | reduced software overhead and larger internal fragmentation. |
| 498 | For the 32 bit kernel, a large page option will not be offered |
| 499 | unless it is supported by the configured processor. |
| 500 | |
| 501 | If unsure, choose 4K_PAGES. |
| 502 | |
| 503 | config PPC_4K_PAGES |
| 504 | bool "4k page size" |
| 505 | |
| 506 | config PPC_16K_PAGES |
| 507 | bool "16k page size" if 44x |
| 508 | |
| 509 | config PPC_64K_PAGES |
| 510 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
| 511 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
| 512 | |
| 513 | config PPC_256K_PAGES |
| 514 | bool "256k page size" if 44x |
| 515 | depends on !STDBINUTILS |
| 516 | help |
| 517 | Make the page size 256k. |
| 518 | |
| 519 | As the ELF standard only requires alignment to support page |
| 520 | sizes up to 64k, you will need to compile all of your user |
| 521 | space applications with a non-standard binutils settings |
| 522 | (see the STDBINUTILS description for details). |
| 523 | |
| 524 | Say N unless you know what you are doing. |
| 525 | |
| 526 | endchoice |
| 527 | |
| 528 | config FORCE_MAX_ZONEORDER |
| 529 | int "Maximum zone order" |
| 530 | range 9 64 if PPC64 && PPC_64K_PAGES |
| 531 | default "9" if PPC64 && PPC_64K_PAGES |
| 532 | range 13 64 if PPC64 && !PPC_64K_PAGES |
| 533 | default "13" if PPC64 && !PPC_64K_PAGES |
| 534 | range 9 64 if PPC32 && PPC_16K_PAGES |
| 535 | default "9" if PPC32 && PPC_16K_PAGES |
| 536 | range 7 64 if PPC32 && PPC_64K_PAGES |
| 537 | default "7" if PPC32 && PPC_64K_PAGES |
| 538 | range 5 64 if PPC32 && PPC_256K_PAGES |
| 539 | default "5" if PPC32 && PPC_256K_PAGES |
| 540 | range 11 64 |
| 541 | default "11" |
| 542 | help |
| 543 | The kernel memory allocator divides physically contiguous memory |
| 544 | blocks into "zones", where each zone is a power of two number of |
| 545 | pages. This option selects the largest power of two that the kernel |
| 546 | keeps in the memory allocator. If you need to allocate very large |
| 547 | blocks of physically contiguous memory, then you may need to |
| 548 | increase this value. |
| 549 | |
| 550 | This config option is actually maximum order plus one. For example, |
| 551 | a value of 11 means that the largest free memory block is 2^10 pages. |
| 552 | |
| 553 | The page size is not necessarily 4KB. For example, on 64-bit |
| 554 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
| 555 | this in mind when choosing a value for this option. |
| 556 | |
| 557 | config PPC_SUBPAGE_PROT |
| 558 | bool "Support setting protections for 4k subpages" |
| 559 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
| 560 | help |
| 561 | This option adds support for a system call to allow user programs |
| 562 | to set access permissions (read/write, readonly, or no access) |
| 563 | on the 4k subpages of each 64k page. |
| 564 | |
| 565 | config SCHED_SMT |
| 566 | bool "SMT (Hyperthreading) scheduler support" |
| 567 | depends on PPC64 && SMP |
| 568 | help |
| 569 | SMT scheduler support improves the CPU scheduler's decision making |
| 570 | when dealing with POWER5 cpus at a cost of slightly increased |
| 571 | overhead in some places. If unsure say N here. |
| 572 | |
| 573 | config CMDLINE_BOOL |
| 574 | bool "Default bootloader kernel arguments" |
| 575 | |
| 576 | config CMDLINE |
| 577 | string "Initial kernel command string" |
| 578 | depends on CMDLINE_BOOL |
| 579 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" |
| 580 | help |
| 581 | On some platforms, there is currently no way for the boot loader to |
| 582 | pass arguments to the kernel. For these platforms, you can supply |
| 583 | some command-line options at build time by entering them here. In |
| 584 | most cases you will need to specify the root device here. |
| 585 | |
| 586 | config EXTRA_TARGETS |
| 587 | string "Additional default image types" |
| 588 | help |
| 589 | List additional targets to be built by the bootwrapper here (separated |
| 590 | by spaces). This is useful for targets that depend of device tree |
| 591 | files in the .dts directory. |
| 592 | |
| 593 | Targets in this list will be build as part of the default build |
| 594 | target, or when the user does a 'make zImage' or a |
| 595 | 'make zImage.initrd'. |
| 596 | |
| 597 | If unsure, leave blank |
| 598 | |
| 599 | if !44x || BROKEN |
| 600 | config ARCH_WANTS_FREEZER_CONTROL |
| 601 | def_bool y |
| 602 | depends on ADB_PMU |
| 603 | |
| 604 | source kernel/power/Kconfig |
| 605 | endif |
| 606 | |
| 607 | config SECCOMP |
| 608 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 609 | depends on PROC_FS |
| 610 | default y |
| 611 | help |
| 612 | This kernel feature is useful for number crunching applications |
| 613 | that may need to compute untrusted bytecode during their |
| 614 | execution. By using pipes or other transports made available to |
| 615 | the process as file descriptors supporting the read/write |
| 616 | syscalls, it's possible to isolate those applications in |
| 617 | their own address space using seccomp. Once seccomp is |
| 618 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 619 | and the task is only allowed to execute a few safe syscalls |
| 620 | defined by each seccomp mode. |
| 621 | |
| 622 | If unsure, say Y. Only embedded should say N here. |
| 623 | |
| 624 | endmenu |
| 625 | |
| 626 | config ISA_DMA_API |
| 627 | bool |
| 628 | default !PPC_ISERIES || PCI |
| 629 | |
| 630 | menu "Bus options" |
| 631 | |
| 632 | config ISA |
| 633 | bool "Support for ISA-bus hardware" |
| 634 | depends on PPC_PREP || PPC_CHRP |
| 635 | select PPC_I8259 |
| 636 | help |
| 637 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 638 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 639 | inside your box. If you have an Apple machine, say N here; if you |
| 640 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If |
| 641 | you have an embedded board, consult your board documentation. |
| 642 | |
| 643 | config ZONE_DMA |
| 644 | bool |
| 645 | default y |
| 646 | |
| 647 | config NEED_DMA_MAP_STATE |
| 648 | def_bool (PPC64 || NOT_COHERENT_CACHE) |
| 649 | |
| 650 | config NEED_SG_DMA_LENGTH |
| 651 | def_bool y |
| 652 | |
| 653 | config GENERIC_ISA_DMA |
| 654 | bool |
| 655 | depends on ISA_DMA_API |
| 656 | default y |
| 657 | |
| 658 | config PPC_INDIRECT_PCI |
| 659 | bool |
| 660 | depends on PCI |
| 661 | default y if 40x || 44x |
| 662 | default n |
| 663 | |
| 664 | config EISA |
| 665 | bool |
| 666 | |
| 667 | config SBUS |
| 668 | bool |
| 669 | |
| 670 | config FSL_SOC |
| 671 | bool |
| 672 | |
| 673 | config FSL_PCI |
| 674 | bool |
| 675 | select PPC_INDIRECT_PCI |
| 676 | select PCI_QUIRKS |
| 677 | |
| 678 | config FSL_PMC |
| 679 | bool |
| 680 | default y |
| 681 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
| 682 | help |
| 683 | Freescale MPC85xx/MPC86xx power management controller support |
| 684 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
| 685 | |
| 686 | config 4xx_SOC |
| 687 | bool |
| 688 | |
| 689 | config FSL_LBC |
| 690 | bool |
| 691 | help |
| 692 | Freescale Localbus support |
| 693 | |
| 694 | config FSL_GTM |
| 695 | bool |
| 696 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
| 697 | help |
| 698 | Freescale General-purpose Timers support |
| 699 | |
| 700 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
| 701 | config MCA |
| 702 | bool |
| 703 | |
| 704 | # Platforms that what PCI turned unconditionally just do select PCI |
| 705 | # in their config node. Platforms that want to choose at config |
| 706 | # time should select PPC_PCI_CHOICE |
| 707 | config PPC_PCI_CHOICE |
| 708 | bool |
| 709 | |
| 710 | config PCI |
| 711 | bool "PCI support" if PPC_PCI_CHOICE |
| 712 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ |
| 713 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
| 714 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
| 715 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
| 716 | select ARCH_SUPPORTS_MSI |
| 717 | help |
| 718 | Find out whether your system includes a PCI bus. PCI is the name of |
| 719 | a bus system, i.e. the way the CPU talks to the other stuff inside |
| 720 | your box. If you say Y here, the kernel will include drivers and |
| 721 | infrastructure code to support PCI bus devices. |
| 722 | |
| 723 | config PCI_DOMAINS |
| 724 | def_bool PCI |
| 725 | |
| 726 | config PCI_SYSCALL |
| 727 | def_bool PCI |
| 728 | |
| 729 | config PCI_QSPAN |
| 730 | bool "QSpan PCI" |
| 731 | depends on !4xx && !CPM2 && 8xx |
| 732 | select PPC_I8259 |
| 733 | help |
| 734 | Say Y here if you have a system based on a Motorola 8xx-series |
| 735 | embedded processor with a QSPAN PCI interface, otherwise say N. |
| 736 | |
| 737 | config PCI_8260 |
| 738 | bool |
| 739 | depends on PCI && 8260 |
| 740 | select PPC_INDIRECT_PCI |
| 741 | default y |
| 742 | |
| 743 | config 8260_PCI9 |
| 744 | bool "Enable workaround for MPC826x erratum PCI 9" |
| 745 | depends on PCI_8260 && !8272 |
| 746 | default y |
| 747 | |
| 748 | choice |
| 749 | prompt "IDMA channel for PCI 9 workaround" |
| 750 | depends on 8260_PCI9 |
| 751 | |
| 752 | config 8260_PCI9_IDMA1 |
| 753 | bool "IDMA1" |
| 754 | |
| 755 | config 8260_PCI9_IDMA2 |
| 756 | bool "IDMA2" |
| 757 | |
| 758 | config 8260_PCI9_IDMA3 |
| 759 | bool "IDMA3" |
| 760 | |
| 761 | config 8260_PCI9_IDMA4 |
| 762 | bool "IDMA4" |
| 763 | |
| 764 | endchoice |
| 765 | |
| 766 | source "drivers/pci/pcie/Kconfig" |
| 767 | |
| 768 | source "drivers/pci/Kconfig" |
| 769 | |
| 770 | source "drivers/pcmcia/Kconfig" |
| 771 | |
| 772 | source "drivers/pci/hotplug/Kconfig" |
| 773 | |
| 774 | config HAS_RAPIDIO |
| 775 | bool |
| 776 | default n |
| 777 | |
| 778 | config RAPIDIO |
| 779 | bool "RapidIO support" |
| 780 | depends on HAS_RAPIDIO |
| 781 | help |
| 782 | If you say Y here, the kernel will include drivers and |
| 783 | infrastructure code to support RapidIO interconnect devices. |
| 784 | |
| 785 | source "drivers/rapidio/Kconfig" |
| 786 | |
| 787 | endmenu |
| 788 | |
| 789 | menu "Advanced setup" |
| 790 | depends on PPC32 |
| 791 | |
| 792 | config ADVANCED_OPTIONS |
| 793 | bool "Prompt for advanced kernel configuration options" |
| 794 | help |
| 795 | This option will enable prompting for a variety of advanced kernel |
| 796 | configuration options. These options can cause the kernel to not |
| 797 | work if they are set incorrectly, but can be used to optimize certain |
| 798 | aspects of kernel memory management. |
| 799 | |
| 800 | Unless you know what you are doing, say N here. |
| 801 | |
| 802 | comment "Default settings for advanced configuration options are used" |
| 803 | depends on !ADVANCED_OPTIONS |
| 804 | |
| 805 | config LOWMEM_SIZE_BOOL |
| 806 | bool "Set maximum low memory" |
| 807 | depends on ADVANCED_OPTIONS |
| 808 | help |
| 809 | This option allows you to set the maximum amount of memory which |
| 810 | will be used as "low memory", that is, memory which the kernel can |
| 811 | access directly, without having to set up a kernel virtual mapping. |
| 812 | This can be useful in optimizing the layout of kernel virtual |
| 813 | memory. |
| 814 | |
| 815 | Say N here unless you know what you are doing. |
| 816 | |
| 817 | config LOWMEM_SIZE |
| 818 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
| 819 | default "0x30000000" |
| 820 | |
| 821 | config LOWMEM_CAM_NUM_BOOL |
| 822 | bool "Set number of CAMs to use to map low memory" |
| 823 | depends on ADVANCED_OPTIONS && FSL_BOOKE |
| 824 | help |
| 825 | This option allows you to set the maximum number of CAM slots that |
| 826 | will be used to map low memory. There are a limited number of slots |
| 827 | available and even more limited number that will fit in the L1 MMU. |
| 828 | However, using more entries will allow mapping more low memory. This |
| 829 | can be useful in optimizing the layout of kernel virtual memory. |
| 830 | |
| 831 | Say N here unless you know what you are doing. |
| 832 | |
| 833 | config LOWMEM_CAM_NUM |
| 834 | depends on FSL_BOOKE |
| 835 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
| 836 | default 3 |
| 837 | |
| 838 | config RELOCATABLE |
| 839 | bool "Build a relocatable kernel (EXPERIMENTAL)" |
| 840 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
| 841 | help |
| 842 | This builds a kernel image that is capable of running at the |
| 843 | location the kernel is loaded at (some alignment restrictions may |
| 844 | exist). |
| 845 | |
| 846 | One use is for the kexec on panic case where the recovery kernel |
| 847 | must live at a different physical address than the primary |
| 848 | kernel. |
| 849 | |
| 850 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 851 | it has been loaded at and the compile time physical addresses |
| 852 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
| 853 | setting can still be useful to bootwrappers that need to know the |
| 854 | load location of the kernel (eg. u-boot/mkimage). |
| 855 | |
| 856 | config PAGE_OFFSET_BOOL |
| 857 | bool "Set custom page offset address" |
| 858 | depends on ADVANCED_OPTIONS |
| 859 | help |
| 860 | This option allows you to set the kernel virtual address at which |
| 861 | the kernel will map low memory. This can be useful in optimizing |
| 862 | the virtual memory layout of the system. |
| 863 | |
| 864 | Say N here unless you know what you are doing. |
| 865 | |
| 866 | config PAGE_OFFSET |
| 867 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
| 868 | default "0xc0000000" |
| 869 | |
| 870 | config KERNEL_START_BOOL |
| 871 | bool "Set custom kernel base address" |
| 872 | depends on ADVANCED_OPTIONS |
| 873 | help |
| 874 | This option allows you to set the kernel virtual address at which |
| 875 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
| 876 | however there are times (like kdump) that one might not want them |
| 877 | to be the same. |
| 878 | |
| 879 | Say N here unless you know what you are doing. |
| 880 | |
| 881 | config KERNEL_START |
| 882 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
| 883 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
| 884 | default "0xc2000000" if CRASH_DUMP && !RELOCATABLE |
| 885 | default "0xc0000000" |
| 886 | |
| 887 | config PHYSICAL_START_BOOL |
| 888 | bool "Set physical address where the kernel is loaded" |
| 889 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
| 890 | help |
| 891 | This gives the physical address where the kernel is loaded. |
| 892 | |
| 893 | Say N here unless you know what you are doing. |
| 894 | |
| 895 | config PHYSICAL_START |
| 896 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
| 897 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE |
| 898 | default "0x00000000" |
| 899 | |
| 900 | config PHYSICAL_ALIGN |
| 901 | hex |
| 902 | default "0x04000000" if FSL_BOOKE |
| 903 | help |
| 904 | This value puts the alignment restrictions on physical address |
| 905 | where kernel is loaded and run from. Kernel is compiled for an |
| 906 | address which meets above alignment restriction. |
| 907 | |
| 908 | config TASK_SIZE_BOOL |
| 909 | bool "Set custom user task size" |
| 910 | depends on ADVANCED_OPTIONS |
| 911 | help |
| 912 | This option allows you to set the amount of virtual address space |
| 913 | allocated to user tasks. This can be useful in optimizing the |
| 914 | virtual memory layout of the system. |
| 915 | |
| 916 | Say N here unless you know what you are doing. |
| 917 | |
| 918 | config TASK_SIZE |
| 919 | hex "Size of user task space" if TASK_SIZE_BOOL |
| 920 | default "0x80000000" if PPC_PREP || PPC_8xx |
| 921 | default "0xc0000000" |
| 922 | |
| 923 | config CONSISTENT_SIZE_BOOL |
| 924 | bool "Set custom consistent memory pool size" |
| 925 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE |
| 926 | help |
| 927 | This option allows you to set the size of the |
| 928 | consistent memory pool. This pool of virtual memory |
| 929 | is used to make consistent memory allocations. |
| 930 | |
| 931 | config CONSISTENT_SIZE |
| 932 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL |
| 933 | default "0x00200000" if NOT_COHERENT_CACHE |
| 934 | |
| 935 | config PIN_TLB |
| 936 | bool "Pinned Kernel TLBs (860 ONLY)" |
| 937 | depends on ADVANCED_OPTIONS && 8xx |
| 938 | endmenu |
| 939 | |
| 940 | if PPC64 |
| 941 | config RELOCATABLE |
| 942 | bool "Build a relocatable kernel" |
| 943 | help |
| 944 | This builds a kernel image that is capable of running anywhere |
| 945 | in the RMA (real memory area) at any 16k-aligned base address. |
| 946 | The kernel is linked as a position-independent executable (PIE) |
| 947 | and contains dynamic relocations which are processed early |
| 948 | in the bootup process. |
| 949 | |
| 950 | One use is for the kexec on panic case where the recovery kernel |
| 951 | must live at a different physical address than the primary |
| 952 | kernel. |
| 953 | |
| 954 | config PAGE_OFFSET |
| 955 | hex |
| 956 | default "0xc000000000000000" |
| 957 | config KERNEL_START |
| 958 | hex |
| 959 | default "0xc000000000000000" |
| 960 | config PHYSICAL_START |
| 961 | hex |
| 962 | default "0x00000000" |
| 963 | endif |
| 964 | |
| 965 | source "net/Kconfig" |
| 966 | |
| 967 | source "drivers/Kconfig" |
| 968 | |
| 969 | source "fs/Kconfig" |
| 970 | |
| 971 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
| 972 | |
| 973 | source "lib/Kconfig" |
| 974 | |
| 975 | source "arch/powerpc/Kconfig.debug" |
| 976 | |
| 977 | source "security/Kconfig" |
| 978 | |
| 979 | config KEYS_COMPAT |
| 980 | bool |
| 981 | depends on COMPAT && KEYS |
| 982 | default y |
| 983 | |
| 984 | source "crypto/Kconfig" |
| 985 | |
| 986 | config PPC_CLOCK |
| 987 | bool |
| 988 | default n |
| 989 | select HAVE_CLK |
| 990 | |
| 991 | config PPC_LIB_RHEAP |
| 992 | bool |
| 993 | |
| 994 | source "arch/powerpc/kvm/Kconfig" |