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