1source "arch/powerpc/platforms/Kconfig.cputype" 2 3config PPC32 4 bool 5 default y if !PPC64 6 7config 32BIT 8 bool 9 default y if PPC32 10 11config 64BIT 12 bool 13 default y if PPC64 14 15config ARCH_PHYS_ADDR_T_64BIT 16 def_bool PPC64 || PHYS_64BIT 17 18config ARCH_DMA_ADDR_T_64BIT 19 def_bool ARCH_PHYS_ADDR_T_64BIT 20 21config MMU 22 bool 23 default y 24 25config HAVE_SETUP_PER_CPU_AREA 26 def_bool PPC64 27 28config NEED_PER_CPU_EMBED_FIRST_CHUNK 29 def_bool PPC64 30 31config NR_IRQS 32 int "Number of virtual interrupt numbers" 33 range 32 32768 34 default "512" 35 help 36 This defines the number of virtual interrupt numbers the kernel 37 can manage. Virtual interrupt numbers are what you see in 38 /proc/interrupts. If you configure your system to have too few, 39 drivers will fail to load or worse - handle with care. 40 41config STACKTRACE_SUPPORT 42 bool 43 default y 44 45config TRACE_IRQFLAGS_SUPPORT 46 bool 47 default y 48 49config LOCKDEP_SUPPORT 50 bool 51 default y 52 53config RWSEM_GENERIC_SPINLOCK 54 bool 55 56config RWSEM_XCHGADD_ALGORITHM 57 bool 58 default y 59 60config GENERIC_LOCKBREAK 61 bool 62 default y 63 depends on SMP && PREEMPT 64 65config ARCH_HAS_ILOG2_U32 66 bool 67 default y 68 69config ARCH_HAS_ILOG2_U64 70 bool 71 default y if 64BIT 72 73config GENERIC_HWEIGHT 74 bool 75 default y 76 77config ARCH_HAS_DMA_SET_COHERENT_MASK 78 bool 79 80config PPC 81 bool 82 default y 83 # 84 # Please keep this list sorted alphabetically. 85 # 86 select ARCH_HAS_DEVMEM_IS_ALLOWED 87 select ARCH_HAS_DMA_SET_COHERENT_MASK 88 select ARCH_HAS_ELF_RANDOMIZE 89 select ARCH_HAS_GCOV_PROFILE_ALL 90 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE 91 select ARCH_HAS_SG_CHAIN 92 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 93 select ARCH_HAS_UBSAN_SANITIZE_ALL 94 select ARCH_HAVE_NMI_SAFE_CMPXCHG 95 select ARCH_MIGHT_HAVE_PC_PARPORT 96 select ARCH_MIGHT_HAVE_PC_SERIO 97 select ARCH_SUPPORTS_ATOMIC_RMW 98 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 99 select ARCH_USE_BUILTIN_BSWAP 100 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 101 select ARCH_WANT_IPC_PARSE_VERSION 102 select BINFMT_ELF 103 select BUILDTIME_EXTABLE_SORT 104 select CLONE_BACKWARDS 105 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 106 select EDAC_ATOMIC_SCRUB 107 select EDAC_SUPPORT 108 select GENERIC_ATOMIC64 if PPC32 109 select GENERIC_CLOCKEVENTS 110 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 111 select GENERIC_CMOS_UPDATE 112 select GENERIC_CPU_AUTOPROBE 113 select GENERIC_IRQ_SHOW 114 select GENERIC_IRQ_SHOW_LEVEL 115 select GENERIC_SMP_IDLE_THREAD 116 select GENERIC_STRNCPY_FROM_USER 117 select GENERIC_STRNLEN_USER 118 select GENERIC_TIME_VSYSCALL_OLD 119 select HAVE_ARCH_AUDITSYSCALL 120 select HAVE_ARCH_HARDENED_USERCOPY 121 select HAVE_ARCH_JUMP_LABEL 122 select HAVE_ARCH_KGDB 123 select HAVE_ARCH_SECCOMP_FILTER 124 select HAVE_ARCH_TRACEHOOK 125 select HAVE_CBPF_JIT if !PPC64 126 select HAVE_CONTEXT_TRACKING if PPC64 127 select HAVE_DEBUG_KMEMLEAK 128 select HAVE_DEBUG_STACKOVERFLOW 129 select HAVE_DMA_API_DEBUG 130 select HAVE_DYNAMIC_FTRACE 131 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 132 select HAVE_EBPF_JIT if PPC64 133 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 134 select HAVE_FTRACE_MCOUNT_RECORD 135 select HAVE_FUNCTION_GRAPH_TRACER 136 select HAVE_FUNCTION_TRACER 137 select HAVE_GCC_PLUGINS 138 select HAVE_GENERIC_RCU_GUP 139 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 140 select HAVE_IDE 141 select HAVE_IOREMAP_PROT 142 select HAVE_IRQ_EXIT_ON_IRQ_STACK 143 select HAVE_KERNEL_GZIP 144 select HAVE_KPROBES 145 select HAVE_KRETPROBES 146 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 147 select HAVE_MEMBLOCK 148 select HAVE_MEMBLOCK_NODE_MAP 149 select HAVE_MOD_ARCH_SPECIFIC 150 select HAVE_NMI if PERF_EVENTS 151 select HAVE_OPROFILE 152 select HAVE_OPTPROBES if PPC64 153 select HAVE_PERF_EVENTS 154 select HAVE_PERF_EVENTS_NMI if PPC64 155 select HAVE_PERF_REGS 156 select HAVE_PERF_USER_STACK_DUMP 157 select HAVE_RCU_TABLE_FREE if SMP 158 select HAVE_REGS_AND_STACK_ACCESS_API 159 select HAVE_SYSCALL_TRACEPOINTS 160 select HAVE_VIRT_CPU_ACCOUNTING 161 select IRQ_DOMAIN 162 select IRQ_FORCED_THREADING 163 select MODULES_USE_ELF_RELA 164 select NO_BOOTMEM 165 select OF 166 select OF_EARLY_FLATTREE 167 select OF_RESERVED_MEM 168 select OLD_SIGACTION if PPC32 169 select OLD_SIGSUSPEND 170 select SPARSE_IRQ 171 select SYSCTL_EXCEPTION_TRACE 172 select VIRT_TO_BUS if !PPC64 173 # 174 # Please keep this list sorted alphabetically. 175 # 176 177config GENERIC_CSUM 178 def_bool n 179 180config EARLY_PRINTK 181 bool 182 default y 183 184config PANIC_TIMEOUT 185 int 186 default 180 187 188config COMPAT 189 bool 190 default y if PPC64 191 select COMPAT_BINFMT_ELF 192 select ARCH_WANT_OLD_COMPAT_IPC 193 select COMPAT_OLD_SIGACTION 194 195config SYSVIPC_COMPAT 196 bool 197 depends on COMPAT && SYSVIPC 198 default y 199 200# All PPC32s use generic nvram driver through ppc_md 201config GENERIC_NVRAM 202 bool 203 default y if PPC32 204 205config SCHED_OMIT_FRAME_POINTER 206 bool 207 default y 208 209config ARCH_MAY_HAVE_PC_FDC 210 bool 211 default PCI 212 213config PPC_UDBG_16550 214 bool 215 default n 216 217config GENERIC_TBSYNC 218 bool 219 default y if PPC32 && SMP 220 default n 221 222config AUDIT_ARCH 223 bool 224 default y 225 226config GENERIC_BUG 227 bool 228 default y 229 depends on BUG 230 231config SYS_SUPPORTS_APM_EMULATION 232 default y if PMAC_APM_EMU 233 bool 234 235config EPAPR_BOOT 236 bool 237 help 238 Used to allow a board to specify it wants an ePAPR compliant wrapper. 239 default n 240 241config DEFAULT_UIMAGE 242 bool 243 help 244 Used to allow a board to specify it wants a uImage built by default 245 default n 246 247config ARCH_HIBERNATION_POSSIBLE 248 bool 249 default y 250 251config ARCH_SUSPEND_POSSIBLE 252 def_bool y 253 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 254 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 255 || 44x || 40x 256 257config PPC_DCR_NATIVE 258 bool 259 default n 260 261config PPC_DCR_MMIO 262 bool 263 default n 264 265config PPC_DCR 266 bool 267 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 268 default y 269 270config PPC_OF_PLATFORM_PCI 271 bool 272 depends on PCI 273 depends on PPC64 # not supported on 32 bits yet 274 default n 275 276config ARCH_SUPPORTS_DEBUG_PAGEALLOC 277 depends on PPC32 || PPC_STD_MMU_64 278 def_bool y 279 280config ARCH_SUPPORTS_UPROBES 281 def_bool y 282 283config PPC_ADV_DEBUG_REGS 284 bool 285 depends on 40x || BOOKE 286 default y 287 288config PPC_ADV_DEBUG_IACS 289 int 290 depends on PPC_ADV_DEBUG_REGS 291 default 4 if 44x 292 default 2 293 294config PPC_ADV_DEBUG_DACS 295 int 296 depends on PPC_ADV_DEBUG_REGS 297 default 2 298 299config PPC_ADV_DEBUG_DVCS 300 int 301 depends on PPC_ADV_DEBUG_REGS 302 default 2 if 44x 303 default 0 304 305config PPC_ADV_DEBUG_DAC_RANGE 306 bool 307 depends on PPC_ADV_DEBUG_REGS && 44x 308 default y 309 310config PPC_EMULATE_SSTEP 311 bool 312 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT 313 314config ZONE_DMA32 315 bool 316 default y if PPC64 317 318config PGTABLE_LEVELS 319 int 320 default 2 if !PPC64 321 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 322 default 4 323 324source "init/Kconfig" 325 326source "kernel/Kconfig.freezer" 327 328source "arch/powerpc/sysdev/Kconfig" 329source "arch/powerpc/platforms/Kconfig" 330 331menu "Kernel options" 332 333config HIGHMEM 334 bool "High memory support" 335 depends on PPC32 336 337source kernel/Kconfig.hz 338source kernel/Kconfig.preempt 339source "fs/Kconfig.binfmt" 340 341config HUGETLB_PAGE_SIZE_VARIABLE 342 bool 343 depends on HUGETLB_PAGE 344 default y 345 346config MATH_EMULATION 347 bool "Math emulation" 348 depends on 4xx || 8xx || PPC_MPC832x || BOOKE 349 ---help--- 350 Some PowerPC chips designed for embedded applications do not have 351 a floating-point unit and therefore do not implement the 352 floating-point instructions in the PowerPC instruction set. If you 353 say Y here, the kernel will include code to emulate a floating-point 354 unit, which will allow programs that use floating-point 355 instructions to run. 356 357 This is also useful to emulate missing (optional) instructions 358 such as fsqrt on cores that do have an FPU but do not implement 359 them (such as Freescale BookE). 360 361choice 362 prompt "Math emulation options" 363 default MATH_EMULATION_FULL 364 depends on MATH_EMULATION 365 366config MATH_EMULATION_FULL 367 bool "Emulate all the floating point instructions" 368 ---help--- 369 Select this option will enable the kernel to support to emulate 370 all the floating point instructions. If your SoC doesn't have 371 a FPU, you should select this. 372 373config MATH_EMULATION_HW_UNIMPLEMENTED 374 bool "Just emulate the FPU unimplemented instructions" 375 ---help--- 376 Select this if you know there does have a hardware FPU on your 377 SoC, but some floating point instructions are not implemented by that. 378 379endchoice 380 381config PPC_TRANSACTIONAL_MEM 382 bool "Transactional Memory support for POWERPC" 383 depends on PPC_BOOK3S_64 384 depends on SMP 385 select ALTIVEC 386 select VSX 387 default n 388 ---help--- 389 Support user-mode Transactional Memory on POWERPC. 390 391config DISABLE_MPROFILE_KERNEL 392 bool "Disable use of mprofile-kernel for kernel tracing" 393 depends on PPC64 && CPU_LITTLE_ENDIAN 394 default y 395 help 396 Selecting this options disables use of the mprofile-kernel ABI for 397 kernel tracing. That will cause options such as live patching 398 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 399 be disabled also. 400 401 If you have a toolchain which supports mprofile-kernel, then you can 402 disable this. Otherwise leave it enabled. If you're not sure, say 403 "Y". 404 405config MPROFILE_KERNEL 406 depends on PPC64 && CPU_LITTLE_ENDIAN 407 def_bool !DISABLE_MPROFILE_KERNEL 408 409config USE_THIN_ARCHIVES 410 bool "Build the kernel using thin archives" 411 default n 412 select THIN_ARCHIVES 413 help 414 Build the kernel using thin archives. 415 If you're unsure say N. 416 417config IOMMU_HELPER 418 def_bool PPC64 419 420config SWIOTLB 421 bool "SWIOTLB support" 422 default n 423 select IOMMU_HELPER 424 ---help--- 425 Support for IO bounce buffering for systems without an IOMMU. 426 This allows us to DMA to the full physical address space on 427 platforms where the size of a physical address is larger 428 than the bus address. Not all platforms support this. 429 430config HOTPLUG_CPU 431 bool "Support for enabling/disabling CPUs" 432 depends on SMP && (PPC_PSERIES || \ 433 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 434 ---help--- 435 Say Y here to be able to disable and re-enable individual 436 CPUs at runtime on SMP machines. 437 438 Say N if you are unsure. 439 440config ARCH_CPU_PROBE_RELEASE 441 def_bool y 442 depends on HOTPLUG_CPU 443 444config ARCH_ENABLE_MEMORY_HOTPLUG 445 def_bool y 446 447config ARCH_HAS_WALK_MEMORY 448 def_bool y 449 450config ARCH_ENABLE_MEMORY_HOTREMOVE 451 def_bool y 452 453config PPC64_SUPPORTS_MEMORY_FAILURE 454 bool "Add support for memory hwpoison" 455 depends on PPC_BOOK3S_64 456 default "y" if PPC_POWERNV 457 select ARCH_SUPPORTS_MEMORY_FAILURE 458 459config KEXEC 460 bool "kexec system call" 461 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 462 select KEXEC_CORE 463 help 464 kexec is a system call that implements the ability to shutdown your 465 current kernel, and to start another kernel. It is like a reboot 466 but it is independent of the system firmware. And like a reboot 467 you can start any kernel with it, not just Linux. 468 469 The name comes from the similarity to the exec system call. 470 471 It is an ongoing process to be certain the hardware in a machine 472 is properly shutdown, so do not be surprised if this code does not 473 initially work for you. As of this writing the exact hardware 474 interface is strongly in flux, so no good recommendation can be 475 made. 476 477config KEXEC_FILE 478 bool "kexec file based system call" 479 select KEXEC_CORE 480 select HAVE_IMA_KEXEC 481 select BUILD_BIN2C 482 depends on PPC64 483 depends on CRYPTO=y 484 depends on CRYPTO_SHA256=y 485 help 486 This is a new version of the kexec system call. This call is 487 file based and takes in file descriptors as system call arguments 488 for kernel and initramfs as opposed to a list of segments as is the 489 case for the older kexec call. 490 491config RELOCATABLE 492 bool "Build a relocatable kernel" 493 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE)) 494 select NONSTATIC_KERNEL 495 select MODULE_REL_CRCS if MODVERSIONS 496 help 497 This builds a kernel image that is capable of running at the 498 location the kernel is loaded at. For ppc32, there is no any 499 alignment restrictions, and this feature is a superset of 500 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 501 16k-aligned base address. The kernel is linked as a 502 position-independent executable (PIE) and contains dynamic relocations 503 which are processed early in the bootup process. 504 505 One use is for the kexec on panic case where the recovery kernel 506 must live at a different physical address than the primary 507 kernel. 508 509 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 510 it has been loaded at and the compile time physical addresses 511 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 512 setting can still be useful to bootwrappers that need to know the 513 load address of the kernel (eg. u-boot/mkimage). 514 515config RELOCATABLE_TEST 516 bool "Test relocatable kernel" 517 depends on (PPC64 && RELOCATABLE) 518 default n 519 help 520 This runs the relocatable kernel at the address it was initially 521 loaded at, which tends to be non-zero and therefore test the 522 relocation code. 523 524config CRASH_DUMP 525 bool "Build a kdump crash kernel" 526 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 527 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 528 help 529 Build a kernel suitable for use as a kdump capture kernel. 530 The same kernel binary can be used as production kernel and dump 531 capture kernel. 532 533config FA_DUMP 534 bool "Firmware-assisted dump" 535 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE 536 help 537 A robust mechanism to get reliable kernel crash dump with 538 assistance from firmware. This approach does not use kexec, 539 instead firmware assists in booting the kdump kernel 540 while preserving memory contents. Firmware-assisted dump 541 is meant to be a kdump replacement offering robustness and 542 speed not possible without system firmware assistance. 543 544 If unsure, say "N" 545 546config IRQ_ALL_CPUS 547 bool "Distribute interrupts on all CPUs by default" 548 depends on SMP 549 help 550 This option gives the kernel permission to distribute IRQs across 551 multiple CPUs. Saying N here will route all IRQs to the first 552 CPU. Generally saying Y is safe, although some problems have been 553 reported with SMP Power Macintoshes with this option enabled. 554 555config NUMA 556 bool "NUMA support" 557 depends on PPC64 558 default y if SMP && PPC_PSERIES 559 560config NODES_SHIFT 561 int 562 default "8" if PPC64 563 default "4" 564 depends on NEED_MULTIPLE_NODES 565 566config USE_PERCPU_NUMA_NODE_ID 567 def_bool y 568 depends on NUMA 569 570config HAVE_MEMORYLESS_NODES 571 def_bool y 572 depends on NUMA 573 574config ARCH_SELECT_MEMORY_MODEL 575 def_bool y 576 depends on PPC64 577 578config ARCH_FLATMEM_ENABLE 579 def_bool y 580 depends on (PPC64 && !NUMA) || PPC32 581 582config ARCH_SPARSEMEM_ENABLE 583 def_bool y 584 depends on PPC64 585 select SPARSEMEM_VMEMMAP_ENABLE 586 587config ARCH_SPARSEMEM_DEFAULT 588 def_bool y 589 depends on (SMP && PPC_PSERIES) || PPC_PS3 590 591config SYS_SUPPORTS_HUGETLBFS 592 bool 593 594config ILLEGAL_POINTER_VALUE 595 hex 596 # This is roughly half way between the top of user space and the bottom 597 # of kernel space, which seems about as good as we can get. 598 default 0x5deadbeef0000000 if PPC64 599 default 0 600 601source "mm/Kconfig" 602 603config ARCH_MEMORY_PROBE 604 def_bool y 605 depends on MEMORY_HOTPLUG 606 607# Some NUMA nodes have memory ranges that span 608# other nodes. Even though a pfn is valid and 609# between a node's start and end pfns, it may not 610# reside on that node. See memmap_init_zone() 611# for details. 612config NODES_SPAN_OTHER_NODES 613 def_bool y 614 depends on NEED_MULTIPLE_NODES 615 616config STDBINUTILS 617 bool "Using standard binutils settings" 618 depends on 44x 619 default y 620 help 621 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 622 Note, that kernel will be able to run only those applications, 623 which had been compiled using binutils later than 2.17.50.0.3 with 624 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 625 the older binutils, you can patch them with a trivial patch, which 626 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 627 628choice 629 prompt "Page size" 630 default PPC_4K_PAGES 631 help 632 Select the kernel logical page size. Increasing the page size 633 will reduce software overhead at each page boundary, allow 634 hardware prefetch mechanisms to be more effective, and allow 635 larger dma transfers increasing IO efficiency and reducing 636 overhead. However the utilization of memory will increase. 637 For example, each cached file will using a multiple of the 638 page size to hold its contents and the difference between the 639 end of file and the end of page is wasted. 640 641 Some dedicated systems, such as software raid serving with 642 accelerated calculations, have shown significant increases. 643 644 If you configure a 64 bit kernel for 64k pages but the 645 processor does not support them, then the kernel will simulate 646 them with 4k pages, loading them on demand, but with the 647 reduced software overhead and larger internal fragmentation. 648 For the 32 bit kernel, a large page option will not be offered 649 unless it is supported by the configured processor. 650 651 If unsure, choose 4K_PAGES. 652 653config PPC_4K_PAGES 654 bool "4k page size" 655 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 656 657config PPC_16K_PAGES 658 bool "16k page size" 659 depends on 44x || PPC_8xx 660 661config PPC_64K_PAGES 662 bool "64k page size" 663 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 664 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 665 666config PPC_256K_PAGES 667 bool "256k page size" 668 depends on 44x && !STDBINUTILS 669 help 670 Make the page size 256k. 671 672 As the ELF standard only requires alignment to support page 673 sizes up to 64k, you will need to compile all of your user 674 space applications with a non-standard binutils settings 675 (see the STDBINUTILS description for details). 676 677 Say N unless you know what you are doing. 678 679endchoice 680 681config FORCE_MAX_ZONEORDER 682 int "Maximum zone order" 683 range 8 9 if PPC64 && PPC_64K_PAGES 684 default "9" if PPC64 && PPC_64K_PAGES 685 range 13 13 if PPC64 && !PPC_64K_PAGES 686 default "13" if PPC64 && !PPC_64K_PAGES 687 range 9 64 if PPC32 && PPC_16K_PAGES 688 default "9" if PPC32 && PPC_16K_PAGES 689 range 7 64 if PPC32 && PPC_64K_PAGES 690 default "7" if PPC32 && PPC_64K_PAGES 691 range 5 64 if PPC32 && PPC_256K_PAGES 692 default "5" if PPC32 && PPC_256K_PAGES 693 range 11 64 694 default "11" 695 help 696 The kernel memory allocator divides physically contiguous memory 697 blocks into "zones", where each zone is a power of two number of 698 pages. This option selects the largest power of two that the kernel 699 keeps in the memory allocator. If you need to allocate very large 700 blocks of physically contiguous memory, then you may need to 701 increase this value. 702 703 This config option is actually maximum order plus one. For example, 704 a value of 11 means that the largest free memory block is 2^10 pages. 705 706 The page size is not necessarily 4KB. For example, on 64-bit 707 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 708 this in mind when choosing a value for this option. 709 710config PPC_SUBPAGE_PROT 711 bool "Support setting protections for 4k subpages" 712 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 713 help 714 This option adds support for a system call to allow user programs 715 to set access permissions (read/write, readonly, or no access) 716 on the 4k subpages of each 64k page. 717 718config PPC_COPRO_BASE 719 bool 720 default n 721 722config SCHED_SMT 723 bool "SMT (Hyperthreading) scheduler support" 724 depends on PPC64 && SMP 725 help 726 SMT scheduler support improves the CPU scheduler's decision making 727 when dealing with POWER5 cpus at a cost of slightly increased 728 overhead in some places. If unsure say N here. 729 730config PPC_DENORMALISATION 731 bool "PowerPC denormalisation exception handling" 732 depends on PPC_BOOK3S_64 733 default "y" if PPC_POWERNV 734 ---help--- 735 Add support for handling denormalisation of single precision 736 values. Useful for bare metal only. If unsure say Y here. 737 738config CMDLINE_BOOL 739 bool "Default bootloader kernel arguments" 740 741config CMDLINE 742 string "Initial kernel command string" 743 depends on CMDLINE_BOOL 744 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 745 help 746 On some platforms, there is currently no way for the boot loader to 747 pass arguments to the kernel. For these platforms, you can supply 748 some command-line options at build time by entering them here. In 749 most cases you will need to specify the root device here. 750 751config CMDLINE_FORCE 752 bool "Always use the default kernel command string" 753 depends on CMDLINE_BOOL 754 help 755 Always use the default kernel command string, even if the boot 756 loader passes other arguments to the kernel. 757 This is useful if you cannot or don't want to change the 758 command-line options your boot loader passes to the kernel. 759 760config EXTRA_TARGETS 761 string "Additional default image types" 762 help 763 List additional targets to be built by the bootwrapper here (separated 764 by spaces). This is useful for targets that depend of device tree 765 files in the .dts directory. 766 767 Targets in this list will be build as part of the default build 768 target, or when the user does a 'make zImage' or a 769 'make zImage.initrd'. 770 771 If unsure, leave blank 772 773config ARCH_WANTS_FREEZER_CONTROL 774 def_bool y 775 depends on ADB_PMU 776 777source kernel/power/Kconfig 778 779config SECCOMP 780 bool "Enable seccomp to safely compute untrusted bytecode" 781 depends on PROC_FS 782 default y 783 help 784 This kernel feature is useful for number crunching applications 785 that may need to compute untrusted bytecode during their 786 execution. By using pipes or other transports made available to 787 the process as file descriptors supporting the read/write 788 syscalls, it's possible to isolate those applications in 789 their own address space using seccomp. Once seccomp is 790 enabled via /proc/<pid>/seccomp, it cannot be disabled 791 and the task is only allowed to execute a few safe syscalls 792 defined by each seccomp mode. 793 794 If unsure, say Y. Only embedded should say N here. 795 796endmenu 797 798config ISA_DMA_API 799 bool 800 default PCI 801 802menu "Bus options" 803 804config ISA 805 bool "Support for ISA-bus hardware" 806 depends on PPC_CHRP 807 select PPC_I8259 808 help 809 Find out whether you have ISA slots on your motherboard. ISA is the 810 name of a bus system, i.e. the way the CPU talks to the other stuff 811 inside your box. If you have an Apple machine, say N here; if you 812 have an IBM RS/6000 or pSeries machine, say Y. If you have an 813 embedded board, consult your board documentation. 814 815config ZONE_DMA 816 bool 817 default y 818 819config NEED_DMA_MAP_STATE 820 def_bool (PPC64 || NOT_COHERENT_CACHE) 821 822config NEED_SG_DMA_LENGTH 823 def_bool y 824 825config GENERIC_ISA_DMA 826 bool 827 depends on ISA_DMA_API 828 default y 829 830config PPC_INDIRECT_PCI 831 bool 832 depends on PCI 833 default y if 40x || 44x 834 default n 835 836config EISA 837 bool 838 839config SBUS 840 bool 841 842config FSL_SOC 843 bool 844 845config FSL_PCI 846 bool 847 select PPC_INDIRECT_PCI 848 select PCI_QUIRKS 849 850config FSL_PMC 851 bool 852 default y 853 depends on SUSPEND && (PPC_85xx || PPC_86xx) 854 help 855 Freescale MPC85xx/MPC86xx power management controller support 856 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 857 858config PPC4xx_CPM 859 bool 860 default y 861 depends on SUSPEND && (44x || 40x) 862 help 863 PPC4xx Clock Power Management (CPM) support (suspend/resume). 864 It also enables support for two different idle states (idle-wait 865 and idle-doze). 866 867config 4xx_SOC 868 bool 869 870config FSL_LBC 871 bool "Freescale Local Bus support" 872 help 873 Enables reporting of errors from the Freescale local bus 874 controller. Also contains some common code used by 875 drivers for specific local bus peripherals. 876 877config FSL_GTM 878 bool 879 depends on PPC_83xx || QUICC_ENGINE || CPM2 880 help 881 Freescale General-purpose Timers support 882 883# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 884config MCA 885 bool 886 887# Platforms that what PCI turned unconditionally just do select PCI 888# in their config node. Platforms that want to choose at config 889# time should select PPC_PCI_CHOICE 890config PPC_PCI_CHOICE 891 bool 892 893config PCI 894 bool "PCI support" if PPC_PCI_CHOICE 895 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 896 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 897 default PCI_QSPAN if !4xx && !CPM2 && 8xx 898 select GENERIC_PCI_IOMAP 899 help 900 Find out whether your system includes a PCI bus. PCI is the name of 901 a bus system, i.e. the way the CPU talks to the other stuff inside 902 your box. If you say Y here, the kernel will include drivers and 903 infrastructure code to support PCI bus devices. 904 905config PCI_DOMAINS 906 def_bool PCI 907 908config PCI_SYSCALL 909 def_bool PCI 910 911config PCI_QSPAN 912 bool "QSpan PCI" 913 depends on !4xx && !CPM2 && 8xx 914 select PPC_I8259 915 help 916 Say Y here if you have a system based on a Motorola 8xx-series 917 embedded processor with a QSPAN PCI interface, otherwise say N. 918 919config PCI_8260 920 bool 921 depends on PCI && 8260 922 select PPC_INDIRECT_PCI 923 default y 924 925source "drivers/pci/Kconfig" 926 927source "drivers/pcmcia/Kconfig" 928 929config HAS_RAPIDIO 930 bool 931 default n 932 933config RAPIDIO 934 tristate "RapidIO support" 935 depends on HAS_RAPIDIO || PCI 936 help 937 If you say Y here, the kernel will include drivers and 938 infrastructure code to support RapidIO interconnect devices. 939 940config FSL_RIO 941 bool "Freescale Embedded SRIO Controller support" 942 depends on RAPIDIO = y && HAS_RAPIDIO 943 default "n" 944 ---help--- 945 Include support for RapidIO controller on Freescale embedded 946 processors (MPC8548, MPC8641, etc). 947 948source "drivers/rapidio/Kconfig" 949 950endmenu 951 952config NONSTATIC_KERNEL 953 bool 954 default n 955 956menu "Advanced setup" 957 depends on PPC32 958 959config ADVANCED_OPTIONS 960 bool "Prompt for advanced kernel configuration options" 961 help 962 This option will enable prompting for a variety of advanced kernel 963 configuration options. These options can cause the kernel to not 964 work if they are set incorrectly, but can be used to optimize certain 965 aspects of kernel memory management. 966 967 Unless you know what you are doing, say N here. 968 969comment "Default settings for advanced configuration options are used" 970 depends on !ADVANCED_OPTIONS 971 972config LOWMEM_SIZE_BOOL 973 bool "Set maximum low memory" 974 depends on ADVANCED_OPTIONS 975 help 976 This option allows you to set the maximum amount of memory which 977 will be used as "low memory", that is, memory which the kernel can 978 access directly, without having to set up a kernel virtual mapping. 979 This can be useful in optimizing the layout of kernel virtual 980 memory. 981 982 Say N here unless you know what you are doing. 983 984config LOWMEM_SIZE 985 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 986 default "0x30000000" 987 988config LOWMEM_CAM_NUM_BOOL 989 bool "Set number of CAMs to use to map low memory" 990 depends on ADVANCED_OPTIONS && FSL_BOOKE 991 help 992 This option allows you to set the maximum number of CAM slots that 993 will be used to map low memory. There are a limited number of slots 994 available and even more limited number that will fit in the L1 MMU. 995 However, using more entries will allow mapping more low memory. This 996 can be useful in optimizing the layout of kernel virtual memory. 997 998 Say N here unless you know what you are doing. 999 1000config LOWMEM_CAM_NUM 1001 depends on FSL_BOOKE 1002 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1003 default 3 1004 1005config DYNAMIC_MEMSTART 1006 bool "Enable page aligned dynamic load address for kernel" 1007 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 1008 select NONSTATIC_KERNEL 1009 help 1010 This option enables the kernel to be loaded at any page aligned 1011 physical address. The kernel creates a mapping from KERNELBASE to 1012 the address where the kernel is loaded. The page size here implies 1013 the TLB page size of the mapping for kernel on the particular platform. 1014 Please refer to the init code for finding the TLB page size. 1015 1016 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1017 kernel image, where the only restriction is the page aligned kernel 1018 load address. When this option is enabled, the compile time physical 1019 address CONFIG_PHYSICAL_START is ignored. 1020 1021 This option is overridden by CONFIG_RELOCATABLE 1022 1023config PAGE_OFFSET_BOOL 1024 bool "Set custom page offset address" 1025 depends on ADVANCED_OPTIONS 1026 help 1027 This option allows you to set the kernel virtual address at which 1028 the kernel will map low memory. This can be useful in optimizing 1029 the virtual memory layout of the system. 1030 1031 Say N here unless you know what you are doing. 1032 1033config PAGE_OFFSET 1034 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1035 default "0xc0000000" 1036 1037config KERNEL_START_BOOL 1038 bool "Set custom kernel base address" 1039 depends on ADVANCED_OPTIONS 1040 help 1041 This option allows you to set the kernel virtual address at which 1042 the kernel will be loaded. Normally this should match PAGE_OFFSET 1043 however there are times (like kdump) that one might not want them 1044 to be the same. 1045 1046 Say N here unless you know what you are doing. 1047 1048config KERNEL_START 1049 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1050 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1051 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1052 default "0xc0000000" 1053 1054config PHYSICAL_START_BOOL 1055 bool "Set physical address where the kernel is loaded" 1056 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1057 help 1058 This gives the physical address where the kernel is loaded. 1059 1060 Say N here unless you know what you are doing. 1061 1062config PHYSICAL_START 1063 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1064 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1065 default "0x00000000" 1066 1067config PHYSICAL_ALIGN 1068 hex 1069 default "0x04000000" if FSL_BOOKE 1070 help 1071 This value puts the alignment restrictions on physical address 1072 where kernel is loaded and run from. Kernel is compiled for an 1073 address which meets above alignment restriction. 1074 1075config TASK_SIZE_BOOL 1076 bool "Set custom user task size" 1077 depends on ADVANCED_OPTIONS 1078 help 1079 This option allows you to set the amount of virtual address space 1080 allocated to user tasks. This can be useful in optimizing the 1081 virtual memory layout of the system. 1082 1083 Say N here unless you know what you are doing. 1084 1085config TASK_SIZE 1086 hex "Size of user task space" if TASK_SIZE_BOOL 1087 default "0x80000000" if PPC_8xx 1088 default "0xc0000000" 1089 1090config CONSISTENT_SIZE_BOOL 1091 bool "Set custom consistent memory pool size" 1092 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1093 help 1094 This option allows you to set the size of the 1095 consistent memory pool. This pool of virtual memory 1096 is used to make consistent memory allocations. 1097 1098config CONSISTENT_SIZE 1099 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1100 default "0x00200000" if NOT_COHERENT_CACHE 1101 1102config PIN_TLB 1103 bool "Pinned Kernel TLBs (860 ONLY)" 1104 depends on ADVANCED_OPTIONS && 8xx 1105 1106config PIN_TLB_IMMR 1107 bool "Pinned TLB for IMMR" 1108 depends on PIN_TLB 1109 default y 1110endmenu 1111 1112if PPC64 1113# This value must have zeroes in the bottom 60 bits otherwise lots will break 1114config PAGE_OFFSET 1115 hex 1116 default "0xc000000000000000" 1117config KERNEL_START 1118 hex 1119 default "0xc000000000000000" 1120config PHYSICAL_START 1121 hex 1122 default "0x00000000" 1123endif 1124 1125config ARCH_RANDOM 1126 def_bool n 1127 1128source "net/Kconfig" 1129 1130source "drivers/Kconfig" 1131 1132source "fs/Kconfig" 1133 1134source "lib/Kconfig" 1135 1136source "arch/powerpc/Kconfig.debug" 1137 1138source "security/Kconfig" 1139 1140config KEYS_COMPAT 1141 bool 1142 depends on COMPAT && KEYS 1143 default y 1144 1145source "crypto/Kconfig" 1146 1147config PPC_LIB_RHEAP 1148 bool 1149 1150source "arch/powerpc/kvm/Kconfig" 1151 1152source "kernel/livepatch/Kconfig" 1153