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