1# For a description of the syntax of this configuration file, 2# see Documentation/kbuild/kconfig-language.txt. 3# 4 5mainmenu "Linux/PowerPC Kernel Configuration" 6 7source "arch/powerpc/platforms/Kconfig.cputype" 8 9config PPC32 10 bool 11 default y if !PPC64 12 13config 64BIT 14 bool 15 default y if PPC64 16 17config WORD_SIZE 18 int 19 default 64 if PPC64 20 default 32 if !PPC64 21 22config ARCH_PHYS_ADDR_T_64BIT 23 def_bool PPC64 || PHYS_64BIT 24 25config MMU 26 bool 27 default y 28 29config GENERIC_CMOS_UPDATE 30 def_bool y 31 32config GENERIC_TIME 33 def_bool y 34 35config GENERIC_TIME_VSYSCALL 36 def_bool y 37 38config GENERIC_CLOCKEVENTS 39 def_bool y 40 41config GENERIC_HARDIRQS 42 bool 43 default y 44 45config HAVE_SETUP_PER_CPU_AREA 46 def_bool PPC64 47 48config IRQ_PER_CPU 49 bool 50 default y 51 52config STACKTRACE_SUPPORT 53 bool 54 default y 55 56config HAVE_LATENCYTOP_SUPPORT 57 def_bool y 58 59config TRACE_IRQFLAGS_SUPPORT 60 bool 61 depends on PPC64 62 default y 63 64config LOCKDEP_SUPPORT 65 bool 66 default y 67 68config RWSEM_GENERIC_SPINLOCK 69 bool 70 71config RWSEM_XCHGADD_ALGORITHM 72 bool 73 default y 74 75config GENERIC_LOCKBREAK 76 bool 77 default y 78 depends on SMP && PREEMPT 79 80config ARCH_HAS_ILOG2_U32 81 bool 82 default y 83 84config ARCH_HAS_ILOG2_U64 85 bool 86 default y if 64BIT 87 88config GENERIC_HWEIGHT 89 bool 90 default y 91 92config GENERIC_CALIBRATE_DELAY 93 bool 94 default y 95 96config GENERIC_FIND_NEXT_BIT 97 bool 98 default y 99 100config GENERIC_GPIO 101 bool 102 help 103 Generic GPIO API support 104 105config ARCH_NO_VIRT_TO_BUS 106 def_bool PPC64 107 108config PPC 109 bool 110 default y 111 select HAVE_FTRACE_MCOUNT_RECORD 112 select HAVE_DYNAMIC_FTRACE 113 select HAVE_FUNCTION_TRACER 114 select ARCH_WANT_OPTIONAL_GPIOLIB 115 select HAVE_IDE 116 select HAVE_IOREMAP_PROT 117 select HAVE_EFFICIENT_UNALIGNED_ACCESS 118 select HAVE_KPROBES 119 select HAVE_ARCH_KGDB 120 select HAVE_KRETPROBES 121 select HAVE_ARCH_TRACEHOOK 122 select HAVE_LMB 123 select HAVE_DMA_ATTRS if PPC64 124 select USE_GENERIC_SMP_HELPERS if SMP 125 select HAVE_OPROFILE 126 select HAVE_SYSCALL_WRAPPERS if PPC64 127 128config EARLY_PRINTK 129 bool 130 default y 131 132config COMPAT 133 bool 134 default y if PPC64 135 select COMPAT_BINFMT_ELF 136 137config SYSVIPC_COMPAT 138 bool 139 depends on COMPAT && SYSVIPC 140 default y 141 142# All PPC32s use generic nvram driver through ppc_md 143config GENERIC_NVRAM 144 bool 145 default y if PPC32 146 147config SCHED_OMIT_FRAME_POINTER 148 bool 149 default y 150 151config ARCH_MAY_HAVE_PC_FDC 152 bool 153 default !PPC_PSERIES || PCI 154 155config PPC_OF 156 def_bool y 157 158config OF 159 def_bool y 160 161config PPC_UDBG_16550 162 bool 163 default n 164 165config GENERIC_TBSYNC 166 bool 167 default y if PPC32 && SMP 168 default n 169 170config AUDIT_ARCH 171 bool 172 default y 173 174config GENERIC_BUG 175 bool 176 default y 177 depends on BUG 178 179config SYS_SUPPORTS_APM_EMULATION 180 default y if PMAC_APM_EMU 181 bool 182 183config DEFAULT_UIMAGE 184 bool 185 help 186 Used to allow a board to specify it wants a uImage built by default 187 default n 188 189config REDBOOT 190 bool 191 192config HIBERNATE_32 193 bool 194 depends on (PPC_PMAC && !SMP) || BROKEN 195 default y 196 197config HIBERNATE_64 198 bool 199 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL) 200 default y 201 202config ARCH_HIBERNATION_POSSIBLE 203 bool 204 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32) 205 default y 206 207config ARCH_SUSPEND_POSSIBLE 208 def_bool y 209 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx 210 211config PPC_DCR_NATIVE 212 bool 213 default n 214 215config PPC_DCR_MMIO 216 bool 217 default n 218 219config PPC_DCR 220 bool 221 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 222 default y 223 224config PPC_OF_PLATFORM_PCI 225 bool 226 depends on PCI 227 depends on PPC64 # not supported on 32 bits yet 228 default n 229 230source "init/Kconfig" 231 232source "kernel/Kconfig.freezer" 233 234source "arch/powerpc/sysdev/Kconfig" 235source "arch/powerpc/platforms/Kconfig" 236 237menu "Kernel options" 238 239config HIGHMEM 240 bool "High memory support" 241 depends on PPC32 242 243source kernel/time/Kconfig 244source kernel/Kconfig.hz 245source kernel/Kconfig.preempt 246source "fs/Kconfig.binfmt" 247 248config HUGETLB_PAGE_SIZE_VARIABLE 249 bool 250 depends on HUGETLB_PAGE 251 default y 252 253config MATH_EMULATION 254 bool "Math emulation" 255 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 256 ---help--- 257 Some PowerPC chips designed for embedded applications do not have 258 a floating-point unit and therefore do not implement the 259 floating-point instructions in the PowerPC instruction set. If you 260 say Y here, the kernel will include code to emulate a floating-point 261 unit, which will allow programs that use floating-point 262 instructions to run. 263 264config 8XX_MINIMAL_FPEMU 265 bool "Minimal math emulation for 8xx" 266 depends on 8xx && !MATH_EMULATION 267 help 268 Older arch/ppc kernels still emulated a few floating point 269 instructions such as load and store, even when full math 270 emulation is disabled. Say "Y" here if you want to preserve 271 this behavior. 272 273 It is recommended that you build a soft-float userspace instead. 274 275config IOMMU_VMERGE 276 bool "Enable IOMMU virtual merging" 277 depends on PPC64 278 default y 279 help 280 Cause IO segments sent to a device for DMA to be merged virtually 281 by the IOMMU when they happen to have been allocated contiguously. 282 This doesn't add pressure to the IOMMU allocator. However, some 283 drivers don't support getting large merged segments coming back 284 from *_map_sg(). 285 286 Most drivers don't have this problem; it is safe to say Y here. 287 288config IOMMU_HELPER 289 def_bool PPC64 290 291config PPC_NEED_DMA_SYNC_OPS 292 def_bool y 293 depends on NOT_COHERENT_CACHE 294 295config HOTPLUG_CPU 296 bool "Support for enabling/disabling CPUs" 297 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) 298 ---help--- 299 Say Y here to be able to disable and re-enable individual 300 CPUs at runtime on SMP machines. 301 302 Say N if you are unsure. 303 304config ARCH_ENABLE_MEMORY_HOTPLUG 305 def_bool y 306 307config ARCH_HAS_WALK_MEMORY 308 def_bool y 309 310config ARCH_ENABLE_MEMORY_HOTREMOVE 311 def_bool y 312 313config KEXEC 314 bool "kexec system call (EXPERIMENTAL)" 315 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL 316 help 317 kexec is a system call that implements the ability to shutdown your 318 current kernel, and to start another kernel. It is like a reboot 319 but it is independent of the system firmware. And like a reboot 320 you can start any kernel with it, not just Linux. 321 322 The name comes from the similarity to the exec system call. 323 324 It is an ongoing process to be certain the hardware in a machine 325 is properly shutdown, so do not be surprised if this code does not 326 initially work for you. It may help to enable device hotplugging 327 support. As of this writing the exact hardware interface is 328 strongly in flux, so no good recommendation can be made. 329 330config CRASH_DUMP 331 bool "Build a kdump crash kernel" 332 depends on PPC64 || 6xx 333 select RELOCATABLE if PPC64 334 help 335 Build a kernel suitable for use as a kdump capture kernel. 336 The same kernel binary can be used as production kernel and dump 337 capture kernel. 338 339config PHYP_DUMP 340 bool "Hypervisor-assisted dump (EXPERIMENTAL)" 341 depends on PPC_PSERIES && EXPERIMENTAL 342 help 343 Hypervisor-assisted dump is meant to be a kdump replacement 344 offering robustness and speed not possible without system 345 hypervisor assistence. 346 347 If unsure, say "N" 348 349config PPCBUG_NVRAM 350 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC 351 default y if PPC_PREP 352 353config IRQ_ALL_CPUS 354 bool "Distribute interrupts on all CPUs by default" 355 depends on SMP && !MV64360 356 help 357 This option gives the kernel permission to distribute IRQs across 358 multiple CPUs. Saying N here will route all IRQs to the first 359 CPU. Generally saying Y is safe, although some problems have been 360 reported with SMP Power Macintoshes with this option enabled. 361 362config NUMA 363 bool "NUMA support" 364 depends on PPC64 365 default y if SMP && PPC_PSERIES 366 367config NODES_SHIFT 368 int 369 default "4" 370 depends on NEED_MULTIPLE_NODES 371 372config ARCH_SELECT_MEMORY_MODEL 373 def_bool y 374 depends on PPC64 375 376config ARCH_FLATMEM_ENABLE 377 def_bool y 378 depends on (PPC64 && !NUMA) || PPC32 379 380config ARCH_SPARSEMEM_ENABLE 381 def_bool y 382 depends on PPC64 383 select SPARSEMEM_VMEMMAP_ENABLE 384 385config ARCH_SPARSEMEM_DEFAULT 386 def_bool y 387 depends on (SMP && PPC_PSERIES) || PPC_PS3 388 389config ARCH_POPULATES_NODE_MAP 390 def_bool y 391 392source "mm/Kconfig" 393 394config ARCH_MEMORY_PROBE 395 def_bool y 396 depends on MEMORY_HOTPLUG 397 398# Some NUMA nodes have memory ranges that span 399# other nodes. Even though a pfn is valid and 400# between a node's start and end pfns, it may not 401# reside on that node. See memmap_init_zone() 402# for details. 403config NODES_SPAN_OTHER_NODES 404 def_bool y 405 depends on NEED_MULTIPLE_NODES 406 407config PPC_HAS_HASH_64K 408 bool 409 depends on PPC64 410 default n 411 412choice 413 prompt "Page size" 414 default PPC_4K_PAGES 415 help 416 Select the kernel logical page size. Increasing the page size 417 will reduce software overhead at each page boundary, allow 418 hardware prefetch mechanisms to be more effective, and allow 419 larger dma transfers increasing IO efficiency and reducing 420 overhead. However the utilization of memory will increase. 421 For example, each cached file will using a multiple of the 422 page size to hold its contents and the difference between the 423 end of file and the end of page is wasted. 424 425 Some dedicated systems, such as software raid serving with 426 accelerated calculations, have shown significant increases. 427 428 If you configure a 64 bit kernel for 64k pages but the 429 processor does not support them, then the kernel will simulate 430 them with 4k pages, loading them on demand, but with the 431 reduced software overhead and larger internal fragmentation. 432 For the 32 bit kernel, a large page option will not be offered 433 unless it is supported by the configured processor. 434 435 If unsure, choose 4K_PAGES. 436 437config PPC_4K_PAGES 438 bool "4k page size" 439 440config PPC_16K_PAGES 441 bool "16k page size" if 44x 442 443config PPC_64K_PAGES 444 bool "64k page size" if 44x || PPC_STD_MMU_64 445 select PPC_HAS_HASH_64K if PPC_STD_MMU_64 446 447endchoice 448 449config FORCE_MAX_ZONEORDER 450 int "Maximum zone order" 451 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES 452 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES 453 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES 454 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES 455 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES 456 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES 457 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES 458 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES 459 range 11 64 460 default "11" 461 help 462 The kernel memory allocator divides physically contiguous memory 463 blocks into "zones", where each zone is a power of two number of 464 pages. This option selects the largest power of two that the kernel 465 keeps in the memory allocator. If you need to allocate very large 466 blocks of physically contiguous memory, then you may need to 467 increase this value. 468 469 This config option is actually maximum order plus one. For example, 470 a value of 11 means that the largest free memory block is 2^10 pages. 471 472 The page size is not necessarily 4KB. For example, on 64-bit 473 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 474 this in mind when choosing a value for this option. 475 476config PPC_SUBPAGE_PROT 477 bool "Support setting protections for 4k subpages" 478 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 479 help 480 This option adds support for a system call to allow user programs 481 to set access permissions (read/write, readonly, or no access) 482 on the 4k subpages of each 64k page. 483 484config SCHED_SMT 485 bool "SMT (Hyperthreading) scheduler support" 486 depends on PPC64 && SMP 487 help 488 SMT scheduler support improves the CPU scheduler's decision making 489 when dealing with POWER5 cpus at a cost of slightly increased 490 overhead in some places. If unsure say N here. 491 492config PROC_DEVICETREE 493 bool "Support for device tree in /proc" 494 depends on PROC_FS 495 help 496 This option adds a device-tree directory under /proc which contains 497 an image of the device tree that the kernel copies from Open 498 Firmware or other boot firmware. If unsure, say Y here. 499 500config CMDLINE_BOOL 501 bool "Default bootloader kernel arguments" 502 503config CMDLINE 504 string "Initial kernel command string" 505 depends on CMDLINE_BOOL 506 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 507 help 508 On some platforms, there is currently no way for the boot loader to 509 pass arguments to the kernel. For these platforms, you can supply 510 some command-line options at build time by entering them here. In 511 most cases you will need to specify the root device here. 512 513config EXTRA_TARGETS 514 string "Additional default image types" 515 help 516 List additional targets to be built by the bootwrapper here (separated 517 by spaces). This is useful for targets that depend of device tree 518 files in the .dts directory. 519 520 Targets in this list will be build as part of the default build 521 target, or when the user does a 'make zImage' or a 522 'make zImage.initrd'. 523 524 If unsure, leave blank 525 526if !44x || BROKEN 527config ARCH_WANTS_FREEZER_CONTROL 528 def_bool y 529 depends on ADB_PMU 530 531source kernel/power/Kconfig 532endif 533 534config SECCOMP 535 bool "Enable seccomp to safely compute untrusted bytecode" 536 depends on PROC_FS 537 default y 538 help 539 This kernel feature is useful for number crunching applications 540 that may need to compute untrusted bytecode during their 541 execution. By using pipes or other transports made available to 542 the process as file descriptors supporting the read/write 543 syscalls, it's possible to isolate those applications in 544 their own address space using seccomp. Once seccomp is 545 enabled via /proc/<pid>/seccomp, it cannot be disabled 546 and the task is only allowed to execute a few safe syscalls 547 defined by each seccomp mode. 548 549 If unsure, say Y. Only embedded should say N here. 550 551endmenu 552 553config ISA_DMA_API 554 bool 555 default !PPC_ISERIES || PCI 556 557menu "Bus options" 558 559config ISA 560 bool "Support for ISA-bus hardware" 561 depends on PPC_PREP || PPC_CHRP 562 select PPC_I8259 563 help 564 Find out whether you have ISA slots on your motherboard. ISA is the 565 name of a bus system, i.e. the way the CPU talks to the other stuff 566 inside your box. If you have an Apple machine, say N here; if you 567 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If 568 you have an embedded board, consult your board documentation. 569 570config ZONE_DMA 571 bool 572 default y 573 574config GENERIC_ISA_DMA 575 bool 576 depends on PPC64 || POWER4 || 6xx && !CPM2 577 default y 578 579config PPC_INDIRECT_PCI 580 bool 581 depends on PCI 582 default y if 40x || 44x 583 default n 584 585config EISA 586 bool 587 588config SBUS 589 bool 590 591config FSL_SOC 592 bool 593 594config FSL_PCI 595 bool 596 select PPC_INDIRECT_PCI 597 598config 4xx_SOC 599 bool 600 601config FSL_LBC 602 bool 603 help 604 Freescale Localbus support 605 606config FSL_GTM 607 bool 608 depends on PPC_83xx || QUICC_ENGINE || CPM2 609 help 610 Freescale General-purpose Timers support 611 612# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 613config MCA 614 bool 615 616# Platforms that what PCI turned unconditionally just do select PCI 617# in their config node. Platforms that want to choose at config 618# time should select PPC_PCI_CHOICE 619config PPC_PCI_CHOICE 620 bool 621 622config PCI 623 bool "PCI support" if PPC_PCI_CHOICE 624 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 625 && !PPC_85xx && !PPC_86xx 626 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx 627 default PCI_QSPAN if !4xx && !CPM2 && 8xx 628 select ARCH_SUPPORTS_MSI 629 help 630 Find out whether your system includes a PCI bus. PCI is the name of 631 a bus system, i.e. the way the CPU talks to the other stuff inside 632 your box. If you say Y here, the kernel will include drivers and 633 infrastructure code to support PCI bus devices. 634 635config PCI_DOMAINS 636 def_bool PCI 637 638config PCI_SYSCALL 639 def_bool PCI 640 641config PCI_QSPAN 642 bool "QSpan PCI" 643 depends on !4xx && !CPM2 && 8xx 644 select PPC_I8259 645 help 646 Say Y here if you have a system based on a Motorola 8xx-series 647 embedded processor with a QSPAN PCI interface, otherwise say N. 648 649config PCI_8260 650 bool 651 depends on PCI && 8260 652 select PPC_INDIRECT_PCI 653 default y 654 655config 8260_PCI9 656 bool "Enable workaround for MPC826x erratum PCI 9" 657 depends on PCI_8260 && !8272 658 default y 659 660choice 661 prompt "IDMA channel for PCI 9 workaround" 662 depends on 8260_PCI9 663 664config 8260_PCI9_IDMA1 665 bool "IDMA1" 666 667config 8260_PCI9_IDMA2 668 bool "IDMA2" 669 670config 8260_PCI9_IDMA3 671 bool "IDMA3" 672 673config 8260_PCI9_IDMA4 674 bool "IDMA4" 675 676endchoice 677 678source "drivers/pci/pcie/Kconfig" 679 680source "drivers/pci/Kconfig" 681 682source "drivers/pcmcia/Kconfig" 683 684source "drivers/pci/hotplug/Kconfig" 685 686config HAS_RAPIDIO 687 bool 688 default n 689 690config RAPIDIO 691 bool "RapidIO support" 692 depends on HAS_RAPIDIO 693 help 694 If you say Y here, the kernel will include drivers and 695 infrastructure code to support RapidIO interconnect devices. 696 697source "drivers/rapidio/Kconfig" 698 699endmenu 700 701menu "Advanced setup" 702 depends on PPC32 703 704config ADVANCED_OPTIONS 705 bool "Prompt for advanced kernel configuration options" 706 help 707 This option will enable prompting for a variety of advanced kernel 708 configuration options. These options can cause the kernel to not 709 work if they are set incorrectly, but can be used to optimize certain 710 aspects of kernel memory management. 711 712 Unless you know what you are doing, say N here. 713 714comment "Default settings for advanced configuration options are used" 715 depends on !ADVANCED_OPTIONS 716 717config LOWMEM_SIZE_BOOL 718 bool "Set maximum low memory" 719 depends on ADVANCED_OPTIONS 720 help 721 This option allows you to set the maximum amount of memory which 722 will be used as "low memory", that is, memory which the kernel can 723 access directly, without having to set up a kernel virtual mapping. 724 This can be useful in optimizing the layout of kernel virtual 725 memory. 726 727 Say N here unless you know what you are doing. 728 729config LOWMEM_SIZE 730 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 731 default "0x30000000" 732 733config RELOCATABLE 734 bool "Build a relocatable kernel (EXPERIMENTAL)" 735 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 736 help 737 This builds a kernel image that is capable of running at the 738 location the kernel is loaded at (some alignment restrictions may 739 exist). 740 741 One use is for the kexec on panic case where the recovery kernel 742 must live at a different physical address than the primary 743 kernel. 744 745 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 746 it has been loaded at and the compile time physical addresses 747 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 748 setting can still be useful to bootwrappers that need to know the 749 load location of the kernel (eg. u-boot/mkimage). 750 751config PAGE_OFFSET_BOOL 752 bool "Set custom page offset address" 753 depends on ADVANCED_OPTIONS 754 help 755 This option allows you to set the kernel virtual address at which 756 the kernel will map low memory. This can be useful in optimizing 757 the virtual memory layout of the system. 758 759 Say N here unless you know what you are doing. 760 761config PAGE_OFFSET 762 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 763 default "0xc0000000" 764 765config KERNEL_START_BOOL 766 bool "Set custom kernel base address" 767 depends on ADVANCED_OPTIONS 768 help 769 This option allows you to set the kernel virtual address at which 770 the kernel will be loaded. Normally this should match PAGE_OFFSET 771 however there are times (like kdump) that one might not want them 772 to be the same. 773 774 Say N here unless you know what you are doing. 775 776config KERNEL_START 777 hex "Virtual address of kernel base" if KERNEL_START_BOOL 778 default PAGE_OFFSET if PAGE_OFFSET_BOOL 779 default "0xc2000000" if CRASH_DUMP 780 default "0xc0000000" 781 782config PHYSICAL_START_BOOL 783 bool "Set physical address where the kernel is loaded" 784 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 785 help 786 This gives the physical address where the kernel is loaded. 787 788 Say N here unless you know what you are doing. 789 790config PHYSICAL_START 791 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 792 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP 793 default "0x00000000" 794 795config PHYSICAL_ALIGN 796 hex 797 default "0x10000000" if FSL_BOOKE 798 help 799 This value puts the alignment restrictions on physical address 800 where kernel is loaded and run from. Kernel is compiled for an 801 address which meets above alignment restriction. 802 803config TASK_SIZE_BOOL 804 bool "Set custom user task size" 805 depends on ADVANCED_OPTIONS 806 help 807 This option allows you to set the amount of virtual address space 808 allocated to user tasks. This can be useful in optimizing the 809 virtual memory layout of the system. 810 811 Say N here unless you know what you are doing. 812 813config TASK_SIZE 814 hex "Size of user task space" if TASK_SIZE_BOOL 815 default "0x80000000" if PPC_PREP || PPC_8xx 816 default "0xc0000000" 817 818config CONSISTENT_START_BOOL 819 bool "Set custom consistent memory pool address" 820 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 821 help 822 This option allows you to set the base virtual address 823 of the consistent memory pool. This pool of virtual 824 memory is used to make consistent memory allocations. 825 826config CONSISTENT_START 827 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL 828 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx) 829 default "0xff100000" if NOT_COHERENT_CACHE 830 831config CONSISTENT_SIZE_BOOL 832 bool "Set custom consistent memory pool size" 833 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 834 help 835 This option allows you to set the size of the 836 consistent memory pool. This pool of virtual memory 837 is used to make consistent memory allocations. 838 839config CONSISTENT_SIZE 840 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 841 default "0x00200000" if NOT_COHERENT_CACHE 842 843config PIN_TLB 844 bool "Pinned Kernel TLBs (860 ONLY)" 845 depends on ADVANCED_OPTIONS && 8xx 846endmenu 847 848if PPC64 849config RELOCATABLE 850 bool "Build a relocatable kernel" 851 help 852 This builds a kernel image that is capable of running anywhere 853 in the RMA (real memory area) at any 16k-aligned base address. 854 The kernel is linked as a position-independent executable (PIE) 855 and contains dynamic relocations which are processed early 856 in the bootup process. 857 858 One use is for the kexec on panic case where the recovery kernel 859 must live at a different physical address than the primary 860 kernel. 861 862config PAGE_OFFSET 863 hex 864 default "0xc000000000000000" 865config KERNEL_START 866 hex 867 default "0xc000000000000000" 868config PHYSICAL_START 869 hex 870 default "0x00000000" 871endif 872 873source "net/Kconfig" 874 875source "drivers/Kconfig" 876 877source "fs/Kconfig" 878 879source "arch/powerpc/sysdev/qe_lib/Kconfig" 880 881source "lib/Kconfig" 882 883source "arch/powerpc/Kconfig.debug" 884 885source "security/Kconfig" 886 887config KEYS_COMPAT 888 bool 889 depends on COMPAT && KEYS 890 default y 891 892source "crypto/Kconfig" 893 894config PPC_CLOCK 895 bool 896 default n 897 select HAVE_CLK 898 899config PPC_LIB_RHEAP 900 bool 901 902source "arch/powerpc/kvm/Kconfig" 903