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 WORD_SIZE 16 int 17 default 64 if PPC64 18 default 32 if !PPC64 19 20config ARCH_PHYS_ADDR_T_64BIT 21 def_bool PPC64 || PHYS_64BIT 22 23config ARCH_DMA_ADDR_T_64BIT 24 def_bool ARCH_PHYS_ADDR_T_64BIT 25 26config MMU 27 bool 28 default y 29 30config HAVE_SETUP_PER_CPU_AREA 31 def_bool PPC64 32 33config NEED_PER_CPU_EMBED_FIRST_CHUNK 34 def_bool PPC64 35 36config NR_IRQS 37 int "Number of virtual interrupt numbers" 38 range 32 32768 39 default "512" 40 help 41 This defines the number of virtual interrupt numbers the kernel 42 can manage. Virtual interrupt numbers are what you see in 43 /proc/interrupts. If you configure your system to have too few, 44 drivers will fail to load or worse - handle with care. 45 46config STACKTRACE_SUPPORT 47 bool 48 default y 49 50config TRACE_IRQFLAGS_SUPPORT 51 bool 52 default y 53 54config LOCKDEP_SUPPORT 55 bool 56 default y 57 58config RWSEM_GENERIC_SPINLOCK 59 bool 60 61config RWSEM_XCHGADD_ALGORITHM 62 bool 63 default y 64 65config GENERIC_LOCKBREAK 66 bool 67 default y 68 depends on SMP && PREEMPT 69 70config ARCH_HAS_ILOG2_U32 71 bool 72 default y 73 74config ARCH_HAS_ILOG2_U64 75 bool 76 default y if 64BIT 77 78config GENERIC_HWEIGHT 79 bool 80 default y 81 82config ARCH_HAS_DMA_SET_COHERENT_MASK 83 bool 84 85config PPC 86 bool 87 default y 88 select ARCH_MIGHT_HAVE_PC_PARPORT 89 select ARCH_MIGHT_HAVE_PC_SERIO 90 select BINFMT_ELF 91 select ARCH_HAS_ELF_RANDOMIZE 92 select OF 93 select OF_EARLY_FLATTREE 94 select OF_RESERVED_MEM 95 select HAVE_FTRACE_MCOUNT_RECORD 96 select HAVE_DYNAMIC_FTRACE 97 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 98 select HAVE_FUNCTION_TRACER 99 select HAVE_FUNCTION_GRAPH_TRACER 100 select SYSCTL_EXCEPTION_TRACE 101 select VIRT_TO_BUS if !PPC64 102 select HAVE_IDE 103 select HAVE_IOREMAP_PROT 104 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN 105 select HAVE_KPROBES 106 select HAVE_ARCH_KGDB 107 select HAVE_KRETPROBES 108 select HAVE_ARCH_TRACEHOOK 109 select HAVE_MEMBLOCK 110 select HAVE_MEMBLOCK_NODE_MAP 111 select HAVE_DMA_API_DEBUG 112 select HAVE_OPROFILE 113 select HAVE_DEBUG_KMEMLEAK 114 select ARCH_HAS_SG_CHAIN 115 select GENERIC_ATOMIC64 if PPC32 116 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 117 select HAVE_PERF_EVENTS 118 select HAVE_PERF_REGS 119 select HAVE_PERF_USER_STACK_DUMP 120 select HAVE_REGS_AND_STACK_ACCESS_API 121 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 122 select ARCH_WANT_IPC_PARSE_VERSION 123 select SPARSE_IRQ 124 select IRQ_DOMAIN 125 select GENERIC_IRQ_SHOW 126 select GENERIC_IRQ_SHOW_LEVEL 127 select IRQ_FORCED_THREADING 128 select HAVE_RCU_TABLE_FREE if SMP 129 select HAVE_SYSCALL_TRACEPOINTS 130 select HAVE_CBPF_JIT if !PPC64 131 select HAVE_EBPF_JIT if PPC64 132 select HAVE_ARCH_JUMP_LABEL 133 select ARCH_HAVE_NMI_SAFE_CMPXCHG 134 select ARCH_HAS_GCOV_PROFILE_ALL 135 select GENERIC_SMP_IDLE_THREAD 136 select GENERIC_CMOS_UPDATE 137 select GENERIC_TIME_VSYSCALL_OLD 138 select GENERIC_CLOCKEVENTS 139 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 140 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 141 select GENERIC_STRNCPY_FROM_USER 142 select GENERIC_STRNLEN_USER 143 select HAVE_MOD_ARCH_SPECIFIC 144 select MODULES_USE_ELF_RELA 145 select CLONE_BACKWARDS 146 select ARCH_USE_BUILTIN_BSWAP 147 select OLD_SIGSUSPEND 148 select OLD_SIGACTION if PPC32 149 select HAVE_DEBUG_STACKOVERFLOW 150 select HAVE_IRQ_EXIT_ON_IRQ_STACK 151 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 152 select HAVE_ARCH_AUDITSYSCALL 153 select ARCH_SUPPORTS_ATOMIC_RMW 154 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 155 select NO_BOOTMEM 156 select HAVE_GENERIC_RCU_GUP 157 select HAVE_PERF_EVENTS_NMI if PPC64 158 select HAVE_NMI if PERF_EVENTS 159 select EDAC_SUPPORT 160 select EDAC_ATOMIC_SCRUB 161 select ARCH_HAS_DMA_SET_COHERENT_MASK 162 select ARCH_HAS_DEVMEM_IS_ALLOWED 163 select HAVE_ARCH_SECCOMP_FILTER 164 select ARCH_HAS_UBSAN_SANITIZE_ALL 165 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 166 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 167 select GENERIC_CPU_AUTOPROBE 168 select HAVE_VIRT_CPU_ACCOUNTING 169 select HAVE_ARCH_HARDENED_USERCOPY 170 171config GENERIC_CSUM 172 def_bool CPU_LITTLE_ENDIAN 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 enable this. Otherwise leave it disabled. If you're not sure, say 397 "N". 398 399config MPROFILE_KERNEL 400 depends on PPC64 && CPU_LITTLE_ENDIAN 401 def_bool !DISABLE_MPROFILE_KERNEL 402 403config IOMMU_HELPER 404 def_bool PPC64 405 406config SWIOTLB 407 bool "SWIOTLB support" 408 default n 409 select IOMMU_HELPER 410 ---help--- 411 Support for IO bounce buffering for systems without an IOMMU. 412 This allows us to DMA to the full physical address space on 413 platforms where the size of a physical address is larger 414 than the bus address. Not all platforms support this. 415 416config HOTPLUG_CPU 417 bool "Support for enabling/disabling CPUs" 418 depends on SMP && (PPC_PSERIES || \ 419 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 420 ---help--- 421 Say Y here to be able to disable and re-enable individual 422 CPUs at runtime on SMP machines. 423 424 Say N if you are unsure. 425 426config ARCH_CPU_PROBE_RELEASE 427 def_bool y 428 depends on HOTPLUG_CPU 429 430config ARCH_ENABLE_MEMORY_HOTPLUG 431 def_bool y 432 433config ARCH_HAS_WALK_MEMORY 434 def_bool y 435 436config ARCH_ENABLE_MEMORY_HOTREMOVE 437 def_bool y 438 439config PPC64_SUPPORTS_MEMORY_FAILURE 440 bool "Add support for memory hwpoison" 441 depends on PPC_BOOK3S_64 442 default "y" if PPC_POWERNV 443 select ARCH_SUPPORTS_MEMORY_FAILURE 444 445config KEXEC 446 bool "kexec system call" 447 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 448 select KEXEC_CORE 449 help 450 kexec is a system call that implements the ability to shutdown your 451 current kernel, and to start another kernel. It is like a reboot 452 but it is independent of the system firmware. And like a reboot 453 you can start any kernel with it, not just Linux. 454 455 The name comes from the similarity to the exec system call. 456 457 It is an ongoing process to be certain the hardware in a machine 458 is properly shutdown, so do not be surprised if this code does not 459 initially work for you. As of this writing the exact hardware 460 interface is strongly in flux, so no good recommendation can be 461 made. 462 463config RELOCATABLE 464 bool "Build a relocatable kernel" 465 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE)) 466 select NONSTATIC_KERNEL 467 help 468 This builds a kernel image that is capable of running at the 469 location the kernel is loaded at. For ppc32, there is no any 470 alignment restrictions, and this feature is a superset of 471 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 472 16k-aligned base address. The kernel is linked as a 473 position-independent executable (PIE) and contains dynamic relocations 474 which are processed early in the bootup process. 475 476 One use is for the kexec on panic case where the recovery kernel 477 must live at a different physical address than the primary 478 kernel. 479 480 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 481 it has been loaded at and the compile time physical addresses 482 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 483 setting can still be useful to bootwrappers that need to know the 484 load address of the kernel (eg. u-boot/mkimage). 485 486config CRASH_DUMP 487 bool "Build a kdump crash kernel" 488 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 489 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 490 help 491 Build a kernel suitable for use as a kdump capture kernel. 492 The same kernel binary can be used as production kernel and dump 493 capture kernel. 494 495config FA_DUMP 496 bool "Firmware-assisted dump" 497 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 498 help 499 A robust mechanism to get reliable kernel crash dump with 500 assistance from firmware. This approach does not use kexec, 501 instead firmware assists in booting the kdump kernel 502 while preserving memory contents. Firmware-assisted dump 503 is meant to be a kdump replacement offering robustness and 504 speed not possible without system firmware assistance. 505 506 If unsure, say "N" 507 508config IRQ_ALL_CPUS 509 bool "Distribute interrupts on all CPUs by default" 510 depends on SMP 511 help 512 This option gives the kernel permission to distribute IRQs across 513 multiple CPUs. Saying N here will route all IRQs to the first 514 CPU. Generally saying Y is safe, although some problems have been 515 reported with SMP Power Macintoshes with this option enabled. 516 517config NUMA 518 bool "NUMA support" 519 depends on PPC64 520 default y if SMP && PPC_PSERIES 521 522config NODES_SHIFT 523 int 524 default "8" if PPC64 525 default "4" 526 depends on NEED_MULTIPLE_NODES 527 528config USE_PERCPU_NUMA_NODE_ID 529 def_bool y 530 depends on NUMA 531 532config HAVE_MEMORYLESS_NODES 533 def_bool y 534 depends on NUMA 535 536config ARCH_SELECT_MEMORY_MODEL 537 def_bool y 538 depends on PPC64 539 540config ARCH_FLATMEM_ENABLE 541 def_bool y 542 depends on (PPC64 && !NUMA) || PPC32 543 544config ARCH_SPARSEMEM_ENABLE 545 def_bool y 546 depends on PPC64 547 select SPARSEMEM_VMEMMAP_ENABLE 548 549config ARCH_SPARSEMEM_DEFAULT 550 def_bool y 551 depends on (SMP && PPC_PSERIES) || PPC_PS3 552 553config SYS_SUPPORTS_HUGETLBFS 554 bool 555 556source "mm/Kconfig" 557 558config ARCH_MEMORY_PROBE 559 def_bool y 560 depends on MEMORY_HOTPLUG 561 562# Some NUMA nodes have memory ranges that span 563# other nodes. Even though a pfn is valid and 564# between a node's start and end pfns, it may not 565# reside on that node. See memmap_init_zone() 566# for details. 567config NODES_SPAN_OTHER_NODES 568 def_bool y 569 depends on NEED_MULTIPLE_NODES 570 571config STDBINUTILS 572 bool "Using standard binutils settings" 573 depends on 44x 574 default y 575 help 576 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 577 Note, that kernel will be able to run only those applications, 578 which had been compiled using binutils later than 2.17.50.0.3 with 579 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 580 the older binutils, you can patch them with a trivial patch, which 581 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 582 583choice 584 prompt "Page size" 585 default PPC_4K_PAGES 586 help 587 Select the kernel logical page size. Increasing the page size 588 will reduce software overhead at each page boundary, allow 589 hardware prefetch mechanisms to be more effective, and allow 590 larger dma transfers increasing IO efficiency and reducing 591 overhead. However the utilization of memory will increase. 592 For example, each cached file will using a multiple of the 593 page size to hold its contents and the difference between the 594 end of file and the end of page is wasted. 595 596 Some dedicated systems, such as software raid serving with 597 accelerated calculations, have shown significant increases. 598 599 If you configure a 64 bit kernel for 64k pages but the 600 processor does not support them, then the kernel will simulate 601 them with 4k pages, loading them on demand, but with the 602 reduced software overhead and larger internal fragmentation. 603 For the 32 bit kernel, a large page option will not be offered 604 unless it is supported by the configured processor. 605 606 If unsure, choose 4K_PAGES. 607 608config PPC_4K_PAGES 609 bool "4k page size" 610 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 611 612config PPC_16K_PAGES 613 bool "16k page size" 614 depends on 44x || PPC_8xx 615 616config PPC_64K_PAGES 617 bool "64k page size" 618 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 619 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 620 621config PPC_256K_PAGES 622 bool "256k page size" 623 depends on 44x && !STDBINUTILS 624 help 625 Make the page size 256k. 626 627 As the ELF standard only requires alignment to support page 628 sizes up to 64k, you will need to compile all of your user 629 space applications with a non-standard binutils settings 630 (see the STDBINUTILS description for details). 631 632 Say N unless you know what you are doing. 633 634endchoice 635 636config FORCE_MAX_ZONEORDER 637 int "Maximum zone order" 638 range 8 9 if PPC64 && PPC_64K_PAGES 639 default "9" if PPC64 && PPC_64K_PAGES 640 range 9 13 if PPC64 && !PPC_64K_PAGES 641 default "13" if PPC64 && !PPC_64K_PAGES 642 range 9 64 if PPC32 && PPC_16K_PAGES 643 default "9" if PPC32 && PPC_16K_PAGES 644 range 7 64 if PPC32 && PPC_64K_PAGES 645 default "7" if PPC32 && PPC_64K_PAGES 646 range 5 64 if PPC32 && PPC_256K_PAGES 647 default "5" if PPC32 && PPC_256K_PAGES 648 range 11 64 649 default "11" 650 help 651 The kernel memory allocator divides physically contiguous memory 652 blocks into "zones", where each zone is a power of two number of 653 pages. This option selects the largest power of two that the kernel 654 keeps in the memory allocator. If you need to allocate very large 655 blocks of physically contiguous memory, then you may need to 656 increase this value. 657 658 This config option is actually maximum order plus one. For example, 659 a value of 11 means that the largest free memory block is 2^10 pages. 660 661 The page size is not necessarily 4KB. For example, on 64-bit 662 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 663 this in mind when choosing a value for this option. 664 665config PPC_SUBPAGE_PROT 666 bool "Support setting protections for 4k subpages" 667 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 668 help 669 This option adds support for a system call to allow user programs 670 to set access permissions (read/write, readonly, or no access) 671 on the 4k subpages of each 64k page. 672 673config PPC_COPRO_BASE 674 bool 675 default n 676 677config SCHED_SMT 678 bool "SMT (Hyperthreading) scheduler support" 679 depends on PPC64 && SMP 680 help 681 SMT scheduler support improves the CPU scheduler's decision making 682 when dealing with POWER5 cpus at a cost of slightly increased 683 overhead in some places. If unsure say N here. 684 685config PPC_DENORMALISATION 686 bool "PowerPC denormalisation exception handling" 687 depends on PPC_BOOK3S_64 688 default "y" if PPC_POWERNV 689 ---help--- 690 Add support for handling denormalisation of single precision 691 values. Useful for bare metal only. If unsure say Y here. 692 693config CMDLINE_BOOL 694 bool "Default bootloader kernel arguments" 695 696config CMDLINE 697 string "Initial kernel command string" 698 depends on CMDLINE_BOOL 699 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 700 help 701 On some platforms, there is currently no way for the boot loader to 702 pass arguments to the kernel. For these platforms, you can supply 703 some command-line options at build time by entering them here. In 704 most cases you will need to specify the root device here. 705 706config CMDLINE_FORCE 707 bool "Always use the default kernel command string" 708 depends on CMDLINE_BOOL 709 help 710 Always use the default kernel command string, even if the boot 711 loader passes other arguments to the kernel. 712 This is useful if you cannot or don't want to change the 713 command-line options your boot loader passes to the kernel. 714 715config EXTRA_TARGETS 716 string "Additional default image types" 717 help 718 List additional targets to be built by the bootwrapper here (separated 719 by spaces). This is useful for targets that depend of device tree 720 files in the .dts directory. 721 722 Targets in this list will be build as part of the default build 723 target, or when the user does a 'make zImage' or a 724 'make zImage.initrd'. 725 726 If unsure, leave blank 727 728config ARCH_WANTS_FREEZER_CONTROL 729 def_bool y 730 depends on ADB_PMU 731 732source kernel/power/Kconfig 733 734config SECCOMP 735 bool "Enable seccomp to safely compute untrusted bytecode" 736 depends on PROC_FS 737 default y 738 help 739 This kernel feature is useful for number crunching applications 740 that may need to compute untrusted bytecode during their 741 execution. By using pipes or other transports made available to 742 the process as file descriptors supporting the read/write 743 syscalls, it's possible to isolate those applications in 744 their own address space using seccomp. Once seccomp is 745 enabled via /proc/<pid>/seccomp, it cannot be disabled 746 and the task is only allowed to execute a few safe syscalls 747 defined by each seccomp mode. 748 749 If unsure, say Y. Only embedded should say N here. 750 751endmenu 752 753config ISA_DMA_API 754 bool 755 default PCI 756 757menu "Bus options" 758 759config ISA 760 bool "Support for ISA-bus hardware" 761 depends on PPC_CHRP 762 select PPC_I8259 763 help 764 Find out whether you have ISA slots on your motherboard. ISA is the 765 name of a bus system, i.e. the way the CPU talks to the other stuff 766 inside your box. If you have an Apple machine, say N here; if you 767 have an IBM RS/6000 or pSeries machine, say Y. If you have an 768 embedded board, consult your board documentation. 769 770config ZONE_DMA 771 bool 772 default y 773 774config NEED_DMA_MAP_STATE 775 def_bool (PPC64 || NOT_COHERENT_CACHE) 776 777config NEED_SG_DMA_LENGTH 778 def_bool y 779 780config GENERIC_ISA_DMA 781 bool 782 depends on ISA_DMA_API 783 default y 784 785config PPC_INDIRECT_PCI 786 bool 787 depends on PCI 788 default y if 40x || 44x 789 default n 790 791config EISA 792 bool 793 794config SBUS 795 bool 796 797config FSL_SOC 798 bool 799 800config FSL_PCI 801 bool 802 select PPC_INDIRECT_PCI 803 select PCI_QUIRKS 804 805config FSL_PMC 806 bool 807 default y 808 depends on SUSPEND && (PPC_85xx || PPC_86xx) 809 help 810 Freescale MPC85xx/MPC86xx power management controller support 811 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 812 813config PPC4xx_CPM 814 bool 815 default y 816 depends on SUSPEND && (44x || 40x) 817 help 818 PPC4xx Clock Power Management (CPM) support (suspend/resume). 819 It also enables support for two different idle states (idle-wait 820 and idle-doze). 821 822config 4xx_SOC 823 bool 824 825config FSL_LBC 826 bool "Freescale Local Bus support" 827 help 828 Enables reporting of errors from the Freescale local bus 829 controller. Also contains some common code used by 830 drivers for specific local bus peripherals. 831 832config FSL_GTM 833 bool 834 depends on PPC_83xx || QUICC_ENGINE || CPM2 835 help 836 Freescale General-purpose Timers support 837 838# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 839config MCA 840 bool 841 842# Platforms that what PCI turned unconditionally just do select PCI 843# in their config node. Platforms that want to choose at config 844# time should select PPC_PCI_CHOICE 845config PPC_PCI_CHOICE 846 bool 847 848config PCI 849 bool "PCI support" if PPC_PCI_CHOICE 850 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 851 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 852 default PCI_QSPAN if !4xx && !CPM2 && 8xx 853 select GENERIC_PCI_IOMAP 854 help 855 Find out whether your system includes a PCI bus. PCI is the name of 856 a bus system, i.e. the way the CPU talks to the other stuff inside 857 your box. If you say Y here, the kernel will include drivers and 858 infrastructure code to support PCI bus devices. 859 860config PCI_DOMAINS 861 def_bool PCI 862 863config PCI_SYSCALL 864 def_bool PCI 865 866config PCI_QSPAN 867 bool "QSpan PCI" 868 depends on !4xx && !CPM2 && 8xx 869 select PPC_I8259 870 help 871 Say Y here if you have a system based on a Motorola 8xx-series 872 embedded processor with a QSPAN PCI interface, otherwise say N. 873 874config PCI_8260 875 bool 876 depends on PCI && 8260 877 select PPC_INDIRECT_PCI 878 default y 879 880source "drivers/pci/Kconfig" 881 882source "drivers/pcmcia/Kconfig" 883 884config HAS_RAPIDIO 885 bool 886 default n 887 888config RAPIDIO 889 tristate "RapidIO support" 890 depends on HAS_RAPIDIO || PCI 891 help 892 If you say Y here, the kernel will include drivers and 893 infrastructure code to support RapidIO interconnect devices. 894 895config FSL_RIO 896 bool "Freescale Embedded SRIO Controller support" 897 depends on RAPIDIO = y && HAS_RAPIDIO 898 default "n" 899 ---help--- 900 Include support for RapidIO controller on Freescale embedded 901 processors (MPC8548, MPC8641, etc). 902 903source "drivers/rapidio/Kconfig" 904 905endmenu 906 907config NONSTATIC_KERNEL 908 bool 909 default n 910 911menu "Advanced setup" 912 depends on PPC32 913 914config ADVANCED_OPTIONS 915 bool "Prompt for advanced kernel configuration options" 916 help 917 This option will enable prompting for a variety of advanced kernel 918 configuration options. These options can cause the kernel to not 919 work if they are set incorrectly, but can be used to optimize certain 920 aspects of kernel memory management. 921 922 Unless you know what you are doing, say N here. 923 924comment "Default settings for advanced configuration options are used" 925 depends on !ADVANCED_OPTIONS 926 927config LOWMEM_SIZE_BOOL 928 bool "Set maximum low memory" 929 depends on ADVANCED_OPTIONS 930 help 931 This option allows you to set the maximum amount of memory which 932 will be used as "low memory", that is, memory which the kernel can 933 access directly, without having to set up a kernel virtual mapping. 934 This can be useful in optimizing the layout of kernel virtual 935 memory. 936 937 Say N here unless you know what you are doing. 938 939config LOWMEM_SIZE 940 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 941 default "0x30000000" 942 943config LOWMEM_CAM_NUM_BOOL 944 bool "Set number of CAMs to use to map low memory" 945 depends on ADVANCED_OPTIONS && FSL_BOOKE 946 help 947 This option allows you to set the maximum number of CAM slots that 948 will be used to map low memory. There are a limited number of slots 949 available and even more limited number that will fit in the L1 MMU. 950 However, using more entries will allow mapping more low memory. This 951 can be useful in optimizing the layout of kernel virtual memory. 952 953 Say N here unless you know what you are doing. 954 955config LOWMEM_CAM_NUM 956 depends on FSL_BOOKE 957 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 958 default 3 959 960config DYNAMIC_MEMSTART 961 bool "Enable page aligned dynamic load address for kernel" 962 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 963 select NONSTATIC_KERNEL 964 help 965 This option enables the kernel to be loaded at any page aligned 966 physical address. The kernel creates a mapping from KERNELBASE to 967 the address where the kernel is loaded. The page size here implies 968 the TLB page size of the mapping for kernel on the particular platform. 969 Please refer to the init code for finding the TLB page size. 970 971 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 972 kernel image, where the only restriction is the page aligned kernel 973 load address. When this option is enabled, the compile time physical 974 address CONFIG_PHYSICAL_START is ignored. 975 976 This option is overridden by CONFIG_RELOCATABLE 977 978config PAGE_OFFSET_BOOL 979 bool "Set custom page offset address" 980 depends on ADVANCED_OPTIONS 981 help 982 This option allows you to set the kernel virtual address at which 983 the kernel will map low memory. This can be useful in optimizing 984 the virtual memory layout of the system. 985 986 Say N here unless you know what you are doing. 987 988config PAGE_OFFSET 989 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 990 default "0xc0000000" 991 992config KERNEL_START_BOOL 993 bool "Set custom kernel base address" 994 depends on ADVANCED_OPTIONS 995 help 996 This option allows you to set the kernel virtual address at which 997 the kernel will be loaded. Normally this should match PAGE_OFFSET 998 however there are times (like kdump) that one might not want them 999 to be the same. 1000 1001 Say N here unless you know what you are doing. 1002 1003config KERNEL_START 1004 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1005 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1006 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1007 default "0xc0000000" 1008 1009config PHYSICAL_START_BOOL 1010 bool "Set physical address where the kernel is loaded" 1011 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1012 help 1013 This gives the physical address where the kernel is loaded. 1014 1015 Say N here unless you know what you are doing. 1016 1017config PHYSICAL_START 1018 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1019 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1020 default "0x00000000" 1021 1022config PHYSICAL_ALIGN 1023 hex 1024 default "0x04000000" if FSL_BOOKE 1025 help 1026 This value puts the alignment restrictions on physical address 1027 where kernel is loaded and run from. Kernel is compiled for an 1028 address which meets above alignment restriction. 1029 1030config TASK_SIZE_BOOL 1031 bool "Set custom user task size" 1032 depends on ADVANCED_OPTIONS 1033 help 1034 This option allows you to set the amount of virtual address space 1035 allocated to user tasks. This can be useful in optimizing the 1036 virtual memory layout of the system. 1037 1038 Say N here unless you know what you are doing. 1039 1040config TASK_SIZE 1041 hex "Size of user task space" if TASK_SIZE_BOOL 1042 default "0x80000000" if PPC_8xx 1043 default "0xc0000000" 1044 1045config CONSISTENT_SIZE_BOOL 1046 bool "Set custom consistent memory pool size" 1047 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1048 help 1049 This option allows you to set the size of the 1050 consistent memory pool. This pool of virtual memory 1051 is used to make consistent memory allocations. 1052 1053config CONSISTENT_SIZE 1054 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1055 default "0x00200000" if NOT_COHERENT_CACHE 1056 1057config PIN_TLB 1058 bool "Pinned Kernel TLBs (860 ONLY)" 1059 depends on ADVANCED_OPTIONS && 8xx 1060 1061config PIN_TLB_IMMR 1062 bool "Pinned TLB for IMMR" 1063 depends on PIN_TLB 1064 default y 1065endmenu 1066 1067if PPC64 1068# This value must have zeroes in the bottom 60 bits otherwise lots will break 1069config PAGE_OFFSET 1070 hex 1071 default "0xc000000000000000" 1072config KERNEL_START 1073 hex 1074 default "0xc000000000000000" 1075config PHYSICAL_START 1076 hex 1077 default "0x00000000" 1078endif 1079 1080config ARCH_RANDOM 1081 def_bool n 1082 1083source "net/Kconfig" 1084 1085source "drivers/Kconfig" 1086 1087source "fs/Kconfig" 1088 1089source "lib/Kconfig" 1090 1091source "arch/powerpc/Kconfig.debug" 1092 1093source "security/Kconfig" 1094 1095config KEYS_COMPAT 1096 bool 1097 depends on COMPAT && KEYS 1098 default y 1099 1100source "crypto/Kconfig" 1101 1102config PPC_LIB_RHEAP 1103 bool 1104 1105source "arch/powerpc/kvm/Kconfig" 1106 1107source "kernel/livepatch/Kconfig" 1108