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 ARCH_WANT_OPTIONAL_GPIOLIB 102 select VIRT_TO_BUS if !PPC64 103 select HAVE_IDE 104 select HAVE_IOREMAP_PROT 105 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN 106 select HAVE_KPROBES 107 select HAVE_ARCH_KGDB 108 select HAVE_KRETPROBES 109 select HAVE_ARCH_TRACEHOOK 110 select HAVE_MEMBLOCK 111 select HAVE_MEMBLOCK_NODE_MAP 112 select HAVE_DMA_API_DEBUG 113 select HAVE_OPROFILE 114 select HAVE_DEBUG_KMEMLEAK 115 select ARCH_HAS_SG_CHAIN 116 select GENERIC_ATOMIC64 if PPC32 117 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 118 select HAVE_PERF_EVENTS 119 select HAVE_PERF_REGS 120 select HAVE_PERF_USER_STACK_DUMP 121 select HAVE_REGS_AND_STACK_ACCESS_API 122 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 123 select ARCH_WANT_IPC_PARSE_VERSION 124 select SPARSE_IRQ 125 select IRQ_DOMAIN 126 select GENERIC_IRQ_SHOW 127 select GENERIC_IRQ_SHOW_LEVEL 128 select IRQ_FORCED_THREADING 129 select HAVE_RCU_TABLE_FREE if SMP 130 select HAVE_SYSCALL_TRACEPOINTS 131 select HAVE_CBPF_JIT if !PPC64 132 select HAVE_EBPF_JIT if PPC64 133 select HAVE_ARCH_JUMP_LABEL 134 select ARCH_HAVE_NMI_SAFE_CMPXCHG 135 select ARCH_HAS_GCOV_PROFILE_ALL 136 select GENERIC_SMP_IDLE_THREAD 137 select GENERIC_CMOS_UPDATE 138 select GENERIC_TIME_VSYSCALL_OLD 139 select GENERIC_CLOCKEVENTS 140 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 141 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 142 select GENERIC_STRNCPY_FROM_USER 143 select GENERIC_STRNLEN_USER 144 select HAVE_MOD_ARCH_SPECIFIC 145 select MODULES_USE_ELF_RELA 146 select CLONE_BACKWARDS 147 select ARCH_USE_BUILTIN_BSWAP 148 select OLD_SIGSUSPEND 149 select OLD_SIGACTION if PPC32 150 select HAVE_DEBUG_STACKOVERFLOW 151 select HAVE_IRQ_EXIT_ON_IRQ_STACK 152 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 153 select HAVE_ARCH_AUDITSYSCALL 154 select ARCH_SUPPORTS_ATOMIC_RMW 155 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 156 select NO_BOOTMEM 157 select HAVE_GENERIC_RCU_GUP 158 select HAVE_PERF_EVENTS_NMI if PPC64 159 select HAVE_NMI if PERF_EVENTS 160 select EDAC_SUPPORT 161 select EDAC_ATOMIC_SCRUB 162 select ARCH_HAS_DMA_SET_COHERENT_MASK 163 select ARCH_HAS_DEVMEM_IS_ALLOWED 164 select HAVE_ARCH_SECCOMP_FILTER 165 select ARCH_HAS_UBSAN_SANITIZE_ALL 166 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 167 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 168 169config GENERIC_CSUM 170 def_bool CPU_LITTLE_ENDIAN 171 172config EARLY_PRINTK 173 bool 174 default y 175 176config PANIC_TIMEOUT 177 int 178 default 180 179 180config COMPAT 181 bool 182 default y if PPC64 183 select COMPAT_BINFMT_ELF 184 select ARCH_WANT_OLD_COMPAT_IPC 185 select COMPAT_OLD_SIGACTION 186 187config SYSVIPC_COMPAT 188 bool 189 depends on COMPAT && SYSVIPC 190 default y 191 192# All PPC32s use generic nvram driver through ppc_md 193config GENERIC_NVRAM 194 bool 195 default y if PPC32 196 197config SCHED_OMIT_FRAME_POINTER 198 bool 199 default y 200 201config ARCH_MAY_HAVE_PC_FDC 202 bool 203 default PCI 204 205config PPC_UDBG_16550 206 bool 207 default n 208 209config GENERIC_TBSYNC 210 bool 211 default y if PPC32 && SMP 212 default n 213 214config AUDIT_ARCH 215 bool 216 default y 217 218config GENERIC_BUG 219 bool 220 default y 221 depends on BUG 222 223config SYS_SUPPORTS_APM_EMULATION 224 default y if PMAC_APM_EMU 225 bool 226 227config EPAPR_BOOT 228 bool 229 help 230 Used to allow a board to specify it wants an ePAPR compliant wrapper. 231 default n 232 233config DEFAULT_UIMAGE 234 bool 235 help 236 Used to allow a board to specify it wants a uImage built by default 237 default n 238 239config ARCH_HIBERNATION_POSSIBLE 240 bool 241 default y 242 243config ARCH_SUSPEND_POSSIBLE 244 def_bool y 245 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 246 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 247 || 44x || 40x 248 249config PPC_DCR_NATIVE 250 bool 251 default n 252 253config PPC_DCR_MMIO 254 bool 255 default n 256 257config PPC_DCR 258 bool 259 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 260 default y 261 262config PPC_OF_PLATFORM_PCI 263 bool 264 depends on PCI 265 depends on PPC64 # not supported on 32 bits yet 266 default n 267 268config ARCH_SUPPORTS_DEBUG_PAGEALLOC 269 depends on PPC32 || PPC_STD_MMU_64 270 def_bool y 271 272config ARCH_SUPPORTS_UPROBES 273 def_bool y 274 275config PPC_ADV_DEBUG_REGS 276 bool 277 depends on 40x || BOOKE 278 default y 279 280config PPC_ADV_DEBUG_IACS 281 int 282 depends on PPC_ADV_DEBUG_REGS 283 default 4 if 44x 284 default 2 285 286config PPC_ADV_DEBUG_DACS 287 int 288 depends on PPC_ADV_DEBUG_REGS 289 default 2 290 291config PPC_ADV_DEBUG_DVCS 292 int 293 depends on PPC_ADV_DEBUG_REGS 294 default 2 if 44x 295 default 0 296 297config PPC_ADV_DEBUG_DAC_RANGE 298 bool 299 depends on PPC_ADV_DEBUG_REGS && 44x 300 default y 301 302config PPC_EMULATE_SSTEP 303 bool 304 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT 305 306config ZONE_DMA32 307 bool 308 default y if PPC64 309 310config PGTABLE_LEVELS 311 int 312 default 2 if !PPC64 313 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 314 default 4 315 316source "init/Kconfig" 317 318source "kernel/Kconfig.freezer" 319 320source "arch/powerpc/sysdev/Kconfig" 321source "arch/powerpc/platforms/Kconfig" 322 323menu "Kernel options" 324 325config HIGHMEM 326 bool "High memory support" 327 depends on PPC32 328 329source kernel/Kconfig.hz 330source kernel/Kconfig.preempt 331source "fs/Kconfig.binfmt" 332 333config HUGETLB_PAGE_SIZE_VARIABLE 334 bool 335 depends on HUGETLB_PAGE 336 default y 337 338config MATH_EMULATION 339 bool "Math emulation" 340 depends on 4xx || 8xx || PPC_MPC832x || BOOKE 341 ---help--- 342 Some PowerPC chips designed for embedded applications do not have 343 a floating-point unit and therefore do not implement the 344 floating-point instructions in the PowerPC instruction set. If you 345 say Y here, the kernel will include code to emulate a floating-point 346 unit, which will allow programs that use floating-point 347 instructions to run. 348 349 This is also useful to emulate missing (optional) instructions 350 such as fsqrt on cores that do have an FPU but do not implement 351 them (such as Freescale BookE). 352 353choice 354 prompt "Math emulation options" 355 default MATH_EMULATION_FULL 356 depends on MATH_EMULATION 357 358config MATH_EMULATION_FULL 359 bool "Emulate all the floating point instructions" 360 ---help--- 361 Select this option will enable the kernel to support to emulate 362 all the floating point instructions. If your SoC doesn't have 363 a FPU, you should select this. 364 365config MATH_EMULATION_HW_UNIMPLEMENTED 366 bool "Just emulate the FPU unimplemented instructions" 367 ---help--- 368 Select this if you know there does have a hardware FPU on your 369 SoC, but some floating point instructions are not implemented by that. 370 371endchoice 372 373config PPC_TRANSACTIONAL_MEM 374 bool "Transactional Memory support for POWERPC" 375 depends on PPC_BOOK3S_64 376 depends on SMP 377 select ALTIVEC 378 select VSX 379 default n 380 ---help--- 381 Support user-mode Transactional Memory on POWERPC. 382 383config DISABLE_MPROFILE_KERNEL 384 bool "Disable use of mprofile-kernel for kernel tracing" 385 depends on PPC64 && CPU_LITTLE_ENDIAN 386 default y 387 help 388 Selecting this options disables use of the mprofile-kernel ABI for 389 kernel tracing. That will cause options such as live patching 390 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 391 be disabled also. 392 393 If you have a toolchain which supports mprofile-kernel, then you can 394 enable this. Otherwise leave it disabled. If you're not sure, say 395 "N". 396 397config MPROFILE_KERNEL 398 depends on PPC64 && CPU_LITTLE_ENDIAN 399 def_bool !DISABLE_MPROFILE_KERNEL 400 401config IOMMU_HELPER 402 def_bool PPC64 403 404config SWIOTLB 405 bool "SWIOTLB support" 406 default n 407 select IOMMU_HELPER 408 ---help--- 409 Support for IO bounce buffering for systems without an IOMMU. 410 This allows us to DMA to the full physical address space on 411 platforms where the size of a physical address is larger 412 than the bus address. Not all platforms support this. 413 414config HOTPLUG_CPU 415 bool "Support for enabling/disabling CPUs" 416 depends on SMP && (PPC_PSERIES || \ 417 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 418 ---help--- 419 Say Y here to be able to disable and re-enable individual 420 CPUs at runtime on SMP machines. 421 422 Say N if you are unsure. 423 424config ARCH_CPU_PROBE_RELEASE 425 def_bool y 426 depends on HOTPLUG_CPU 427 428config ARCH_ENABLE_MEMORY_HOTPLUG 429 def_bool y 430 431config ARCH_HAS_WALK_MEMORY 432 def_bool y 433 434config ARCH_ENABLE_MEMORY_HOTREMOVE 435 def_bool y 436 437config PPC64_SUPPORTS_MEMORY_FAILURE 438 bool "Add support for memory hwpoison" 439 depends on PPC_BOOK3S_64 440 default "y" if PPC_POWERNV 441 select ARCH_SUPPORTS_MEMORY_FAILURE 442 443config KEXEC 444 bool "kexec system call" 445 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 446 select KEXEC_CORE 447 help 448 kexec is a system call that implements the ability to shutdown your 449 current kernel, and to start another kernel. It is like a reboot 450 but it is independent of the system firmware. And like a reboot 451 you can start any kernel with it, not just Linux. 452 453 The name comes from the similarity to the exec system call. 454 455 It is an ongoing process to be certain the hardware in a machine 456 is properly shutdown, so do not be surprised if this code does not 457 initially work for you. As of this writing the exact hardware 458 interface is strongly in flux, so no good recommendation can be 459 made. 460 461config CRASH_DUMP 462 bool "Build a kdump crash kernel" 463 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 464 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 465 help 466 Build a kernel suitable for use as a kdump capture kernel. 467 The same kernel binary can be used as production kernel and dump 468 capture kernel. 469 470config FA_DUMP 471 bool "Firmware-assisted dump" 472 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 473 help 474 A robust mechanism to get reliable kernel crash dump with 475 assistance from firmware. This approach does not use kexec, 476 instead firmware assists in booting the kdump kernel 477 while preserving memory contents. Firmware-assisted dump 478 is meant to be a kdump replacement offering robustness and 479 speed not possible without system firmware assistance. 480 481 If unsure, say "N" 482 483config IRQ_ALL_CPUS 484 bool "Distribute interrupts on all CPUs by default" 485 depends on SMP 486 help 487 This option gives the kernel permission to distribute IRQs across 488 multiple CPUs. Saying N here will route all IRQs to the first 489 CPU. Generally saying Y is safe, although some problems have been 490 reported with SMP Power Macintoshes with this option enabled. 491 492config NUMA 493 bool "NUMA support" 494 depends on PPC64 495 default y if SMP && PPC_PSERIES 496 497config NODES_SHIFT 498 int 499 default "8" if PPC64 500 default "4" 501 depends on NEED_MULTIPLE_NODES 502 503config USE_PERCPU_NUMA_NODE_ID 504 def_bool y 505 depends on NUMA 506 507config HAVE_MEMORYLESS_NODES 508 def_bool y 509 depends on NUMA 510 511config ARCH_SELECT_MEMORY_MODEL 512 def_bool y 513 depends on PPC64 514 515config ARCH_FLATMEM_ENABLE 516 def_bool y 517 depends on (PPC64 && !NUMA) || PPC32 518 519config ARCH_SPARSEMEM_ENABLE 520 def_bool y 521 depends on PPC64 522 select SPARSEMEM_VMEMMAP_ENABLE 523 524config ARCH_SPARSEMEM_DEFAULT 525 def_bool y 526 depends on (SMP && PPC_PSERIES) || PPC_PS3 527 528config SYS_SUPPORTS_HUGETLBFS 529 bool 530 531source "mm/Kconfig" 532 533config ARCH_MEMORY_PROBE 534 def_bool y 535 depends on MEMORY_HOTPLUG 536 537# Some NUMA nodes have memory ranges that span 538# other nodes. Even though a pfn is valid and 539# between a node's start and end pfns, it may not 540# reside on that node. See memmap_init_zone() 541# for details. 542config NODES_SPAN_OTHER_NODES 543 def_bool y 544 depends on NEED_MULTIPLE_NODES 545 546config STDBINUTILS 547 bool "Using standard binutils settings" 548 depends on 44x 549 default y 550 help 551 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 552 Note, that kernel will be able to run only those applications, 553 which had been compiled using binutils later than 2.17.50.0.3 with 554 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 555 the older binutils, you can patch them with a trivial patch, which 556 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 557 558choice 559 prompt "Page size" 560 default PPC_4K_PAGES 561 help 562 Select the kernel logical page size. Increasing the page size 563 will reduce software overhead at each page boundary, allow 564 hardware prefetch mechanisms to be more effective, and allow 565 larger dma transfers increasing IO efficiency and reducing 566 overhead. However the utilization of memory will increase. 567 For example, each cached file will using a multiple of the 568 page size to hold its contents and the difference between the 569 end of file and the end of page is wasted. 570 571 Some dedicated systems, such as software raid serving with 572 accelerated calculations, have shown significant increases. 573 574 If you configure a 64 bit kernel for 64k pages but the 575 processor does not support them, then the kernel will simulate 576 them with 4k pages, loading them on demand, but with the 577 reduced software overhead and larger internal fragmentation. 578 For the 32 bit kernel, a large page option will not be offered 579 unless it is supported by the configured processor. 580 581 If unsure, choose 4K_PAGES. 582 583config PPC_4K_PAGES 584 bool "4k page size" 585 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 586 587config PPC_16K_PAGES 588 bool "16k page size" 589 depends on 44x || PPC_8xx 590 591config PPC_64K_PAGES 592 bool "64k page size" 593 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 594 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 595 596config PPC_256K_PAGES 597 bool "256k page size" 598 depends on 44x && !STDBINUTILS 599 help 600 Make the page size 256k. 601 602 As the ELF standard only requires alignment to support page 603 sizes up to 64k, you will need to compile all of your user 604 space applications with a non-standard binutils settings 605 (see the STDBINUTILS description for details). 606 607 Say N unless you know what you are doing. 608 609endchoice 610 611config FORCE_MAX_ZONEORDER 612 int "Maximum zone order" 613 range 8 9 if PPC64 && PPC_64K_PAGES 614 default "9" if PPC64 && PPC_64K_PAGES 615 range 9 13 if PPC64 && !PPC_64K_PAGES 616 default "13" if PPC64 && !PPC_64K_PAGES 617 range 9 64 if PPC32 && PPC_16K_PAGES 618 default "9" if PPC32 && PPC_16K_PAGES 619 range 7 64 if PPC32 && PPC_64K_PAGES 620 default "7" if PPC32 && PPC_64K_PAGES 621 range 5 64 if PPC32 && PPC_256K_PAGES 622 default "5" if PPC32 && PPC_256K_PAGES 623 range 11 64 624 default "11" 625 help 626 The kernel memory allocator divides physically contiguous memory 627 blocks into "zones", where each zone is a power of two number of 628 pages. This option selects the largest power of two that the kernel 629 keeps in the memory allocator. If you need to allocate very large 630 blocks of physically contiguous memory, then you may need to 631 increase this value. 632 633 This config option is actually maximum order plus one. For example, 634 a value of 11 means that the largest free memory block is 2^10 pages. 635 636 The page size is not necessarily 4KB. For example, on 64-bit 637 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 638 this in mind when choosing a value for this option. 639 640config PPC_SUBPAGE_PROT 641 bool "Support setting protections for 4k subpages" 642 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 643 help 644 This option adds support for a system call to allow user programs 645 to set access permissions (read/write, readonly, or no access) 646 on the 4k subpages of each 64k page. 647 648config PPC_COPRO_BASE 649 bool 650 default n 651 652config SCHED_SMT 653 bool "SMT (Hyperthreading) scheduler support" 654 depends on PPC64 && SMP 655 help 656 SMT scheduler support improves the CPU scheduler's decision making 657 when dealing with POWER5 cpus at a cost of slightly increased 658 overhead in some places. If unsure say N here. 659 660config PPC_DENORMALISATION 661 bool "PowerPC denormalisation exception handling" 662 depends on PPC_BOOK3S_64 663 default "y" if PPC_POWERNV 664 ---help--- 665 Add support for handling denormalisation of single precision 666 values. Useful for bare metal only. If unsure say Y here. 667 668config CMDLINE_BOOL 669 bool "Default bootloader kernel arguments" 670 671config CMDLINE 672 string "Initial kernel command string" 673 depends on CMDLINE_BOOL 674 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 675 help 676 On some platforms, there is currently no way for the boot loader to 677 pass arguments to the kernel. For these platforms, you can supply 678 some command-line options at build time by entering them here. In 679 most cases you will need to specify the root device here. 680 681config CMDLINE_FORCE 682 bool "Always use the default kernel command string" 683 depends on CMDLINE_BOOL 684 help 685 Always use the default kernel command string, even if the boot 686 loader passes other arguments to the kernel. 687 This is useful if you cannot or don't want to change the 688 command-line options your boot loader passes to the kernel. 689 690config EXTRA_TARGETS 691 string "Additional default image types" 692 help 693 List additional targets to be built by the bootwrapper here (separated 694 by spaces). This is useful for targets that depend of device tree 695 files in the .dts directory. 696 697 Targets in this list will be build as part of the default build 698 target, or when the user does a 'make zImage' or a 699 'make zImage.initrd'. 700 701 If unsure, leave blank 702 703config ARCH_WANTS_FREEZER_CONTROL 704 def_bool y 705 depends on ADB_PMU 706 707source kernel/power/Kconfig 708 709config SECCOMP 710 bool "Enable seccomp to safely compute untrusted bytecode" 711 depends on PROC_FS 712 default y 713 help 714 This kernel feature is useful for number crunching applications 715 that may need to compute untrusted bytecode during their 716 execution. By using pipes or other transports made available to 717 the process as file descriptors supporting the read/write 718 syscalls, it's possible to isolate those applications in 719 their own address space using seccomp. Once seccomp is 720 enabled via /proc/<pid>/seccomp, it cannot be disabled 721 and the task is only allowed to execute a few safe syscalls 722 defined by each seccomp mode. 723 724 If unsure, say Y. Only embedded should say N here. 725 726endmenu 727 728config ISA_DMA_API 729 bool 730 default PCI 731 732menu "Bus options" 733 734config ISA 735 bool "Support for ISA-bus hardware" 736 depends on PPC_CHRP 737 select PPC_I8259 738 help 739 Find out whether you have ISA slots on your motherboard. ISA is the 740 name of a bus system, i.e. the way the CPU talks to the other stuff 741 inside your box. If you have an Apple machine, say N here; if you 742 have an IBM RS/6000 or pSeries machine, say Y. If you have an 743 embedded board, consult your board documentation. 744 745config ZONE_DMA 746 bool 747 default y 748 749config NEED_DMA_MAP_STATE 750 def_bool (PPC64 || NOT_COHERENT_CACHE) 751 752config NEED_SG_DMA_LENGTH 753 def_bool y 754 755config GENERIC_ISA_DMA 756 bool 757 depends on ISA_DMA_API 758 default y 759 760config PPC_INDIRECT_PCI 761 bool 762 depends on PCI 763 default y if 40x || 44x 764 default n 765 766config EISA 767 bool 768 769config SBUS 770 bool 771 772config FSL_SOC 773 bool 774 775config FSL_PCI 776 bool 777 select PPC_INDIRECT_PCI 778 select PCI_QUIRKS 779 780config FSL_PMC 781 bool 782 default y 783 depends on SUSPEND && (PPC_85xx || PPC_86xx) 784 help 785 Freescale MPC85xx/MPC86xx power management controller support 786 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 787 788config PPC4xx_CPM 789 bool 790 default y 791 depends on SUSPEND && (44x || 40x) 792 help 793 PPC4xx Clock Power Management (CPM) support (suspend/resume). 794 It also enables support for two different idle states (idle-wait 795 and idle-doze). 796 797config 4xx_SOC 798 bool 799 800config FSL_LBC 801 bool "Freescale Local Bus support" 802 help 803 Enables reporting of errors from the Freescale local bus 804 controller. Also contains some common code used by 805 drivers for specific local bus peripherals. 806 807config FSL_GTM 808 bool 809 depends on PPC_83xx || QUICC_ENGINE || CPM2 810 help 811 Freescale General-purpose Timers support 812 813# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 814config MCA 815 bool 816 817# Platforms that what PCI turned unconditionally just do select PCI 818# in their config node. Platforms that want to choose at config 819# time should select PPC_PCI_CHOICE 820config PPC_PCI_CHOICE 821 bool 822 823config PCI 824 bool "PCI support" if PPC_PCI_CHOICE 825 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 826 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 827 default PCI_QSPAN if !4xx && !CPM2 && 8xx 828 select GENERIC_PCI_IOMAP 829 help 830 Find out whether your system includes a PCI bus. PCI is the name of 831 a bus system, i.e. the way the CPU talks to the other stuff inside 832 your box. If you say Y here, the kernel will include drivers and 833 infrastructure code to support PCI bus devices. 834 835config PCI_DOMAINS 836 def_bool PCI 837 838config PCI_SYSCALL 839 def_bool PCI 840 841config PCI_QSPAN 842 bool "QSpan PCI" 843 depends on !4xx && !CPM2 && 8xx 844 select PPC_I8259 845 help 846 Say Y here if you have a system based on a Motorola 8xx-series 847 embedded processor with a QSPAN PCI interface, otherwise say N. 848 849config PCI_8260 850 bool 851 depends on PCI && 8260 852 select PPC_INDIRECT_PCI 853 default y 854 855source "drivers/pci/Kconfig" 856 857source "drivers/pcmcia/Kconfig" 858 859config HAS_RAPIDIO 860 bool 861 default n 862 863config RAPIDIO 864 tristate "RapidIO support" 865 depends on HAS_RAPIDIO || PCI 866 help 867 If you say Y here, the kernel will include drivers and 868 infrastructure code to support RapidIO interconnect devices. 869 870config FSL_RIO 871 bool "Freescale Embedded SRIO Controller support" 872 depends on RAPIDIO = y && HAS_RAPIDIO 873 default "n" 874 ---help--- 875 Include support for RapidIO controller on Freescale embedded 876 processors (MPC8548, MPC8641, etc). 877 878source "drivers/rapidio/Kconfig" 879 880endmenu 881 882config NONSTATIC_KERNEL 883 bool 884 default n 885 886menu "Advanced setup" 887 depends on PPC32 888 889config ADVANCED_OPTIONS 890 bool "Prompt for advanced kernel configuration options" 891 help 892 This option will enable prompting for a variety of advanced kernel 893 configuration options. These options can cause the kernel to not 894 work if they are set incorrectly, but can be used to optimize certain 895 aspects of kernel memory management. 896 897 Unless you know what you are doing, say N here. 898 899comment "Default settings for advanced configuration options are used" 900 depends on !ADVANCED_OPTIONS 901 902config LOWMEM_SIZE_BOOL 903 bool "Set maximum low memory" 904 depends on ADVANCED_OPTIONS 905 help 906 This option allows you to set the maximum amount of memory which 907 will be used as "low memory", that is, memory which the kernel can 908 access directly, without having to set up a kernel virtual mapping. 909 This can be useful in optimizing the layout of kernel virtual 910 memory. 911 912 Say N here unless you know what you are doing. 913 914config LOWMEM_SIZE 915 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 916 default "0x30000000" 917 918config LOWMEM_CAM_NUM_BOOL 919 bool "Set number of CAMs to use to map low memory" 920 depends on ADVANCED_OPTIONS && FSL_BOOKE 921 help 922 This option allows you to set the maximum number of CAM slots that 923 will be used to map low memory. There are a limited number of slots 924 available and even more limited number that will fit in the L1 MMU. 925 However, using more entries will allow mapping more low memory. This 926 can be useful in optimizing the layout of kernel virtual memory. 927 928 Say N here unless you know what you are doing. 929 930config LOWMEM_CAM_NUM 931 depends on FSL_BOOKE 932 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 933 default 3 934 935config DYNAMIC_MEMSTART 936 bool "Enable page aligned dynamic load address for kernel" 937 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 938 select NONSTATIC_KERNEL 939 help 940 This option enables the kernel to be loaded at any page aligned 941 physical address. The kernel creates a mapping from KERNELBASE to 942 the address where the kernel is loaded. The page size here implies 943 the TLB page size of the mapping for kernel on the particular platform. 944 Please refer to the init code for finding the TLB page size. 945 946 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 947 kernel image, where the only restriction is the page aligned kernel 948 load address. When this option is enabled, the compile time physical 949 address CONFIG_PHYSICAL_START is ignored. 950 951 This option is overridden by CONFIG_RELOCATABLE 952 953config RELOCATABLE 954 bool "Build a relocatable kernel" 955 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE) 956 select NONSTATIC_KERNEL 957 help 958 This builds a kernel image that is capable of running at the 959 location the kernel is loaded at, without any alignment restrictions. 960 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. 961 962 One use is for the kexec on panic case where the recovery kernel 963 must live at a different physical address than the primary 964 kernel. 965 966 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 967 it has been loaded at and the compile time physical addresses 968 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 969 setting can still be useful to bootwrappers that need to know the 970 load address of the kernel (eg. u-boot/mkimage). 971 972config RELOCATABLE_PPC32 973 def_bool y 974 depends on PPC32 && RELOCATABLE 975 976config PAGE_OFFSET_BOOL 977 bool "Set custom page offset address" 978 depends on ADVANCED_OPTIONS 979 help 980 This option allows you to set the kernel virtual address at which 981 the kernel will map low memory. This can be useful in optimizing 982 the virtual memory layout of the system. 983 984 Say N here unless you know what you are doing. 985 986config PAGE_OFFSET 987 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 988 default "0xc0000000" 989 990config KERNEL_START_BOOL 991 bool "Set custom kernel base address" 992 depends on ADVANCED_OPTIONS 993 help 994 This option allows you to set the kernel virtual address at which 995 the kernel will be loaded. Normally this should match PAGE_OFFSET 996 however there are times (like kdump) that one might not want them 997 to be the same. 998 999 Say N here unless you know what you are doing. 1000 1001config KERNEL_START 1002 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1003 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1004 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1005 default "0xc0000000" 1006 1007config PHYSICAL_START_BOOL 1008 bool "Set physical address where the kernel is loaded" 1009 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1010 help 1011 This gives the physical address where the kernel is loaded. 1012 1013 Say N here unless you know what you are doing. 1014 1015config PHYSICAL_START 1016 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1017 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1018 default "0x00000000" 1019 1020config PHYSICAL_ALIGN 1021 hex 1022 default "0x04000000" if FSL_BOOKE 1023 help 1024 This value puts the alignment restrictions on physical address 1025 where kernel is loaded and run from. Kernel is compiled for an 1026 address which meets above alignment restriction. 1027 1028config TASK_SIZE_BOOL 1029 bool "Set custom user task size" 1030 depends on ADVANCED_OPTIONS 1031 help 1032 This option allows you to set the amount of virtual address space 1033 allocated to user tasks. This can be useful in optimizing the 1034 virtual memory layout of the system. 1035 1036 Say N here unless you know what you are doing. 1037 1038config TASK_SIZE 1039 hex "Size of user task space" if TASK_SIZE_BOOL 1040 default "0x80000000" if PPC_8xx 1041 default "0xc0000000" 1042 1043config CONSISTENT_SIZE_BOOL 1044 bool "Set custom consistent memory pool size" 1045 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1046 help 1047 This option allows you to set the size of the 1048 consistent memory pool. This pool of virtual memory 1049 is used to make consistent memory allocations. 1050 1051config CONSISTENT_SIZE 1052 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1053 default "0x00200000" if NOT_COHERENT_CACHE 1054 1055config PIN_TLB 1056 bool "Pinned Kernel TLBs (860 ONLY)" 1057 depends on ADVANCED_OPTIONS && 8xx 1058endmenu 1059 1060if PPC64 1061config RELOCATABLE 1062 bool "Build a relocatable kernel" 1063 depends on !COMPILE_TEST 1064 select NONSTATIC_KERNEL 1065 help 1066 This builds a kernel image that is capable of running anywhere 1067 in the RMA (real memory area) at any 16k-aligned base address. 1068 The kernel is linked as a position-independent executable (PIE) 1069 and contains dynamic relocations which are processed early 1070 in the bootup process. 1071 1072 One use is for the kexec on panic case where the recovery kernel 1073 must live at a different physical address than the primary 1074 kernel. 1075 1076# This value must have zeroes in the bottom 60 bits otherwise lots will break 1077config PAGE_OFFSET 1078 hex 1079 default "0xc000000000000000" 1080config KERNEL_START 1081 hex 1082 default "0xc000000000000000" 1083config PHYSICAL_START 1084 hex 1085 default "0x00000000" 1086endif 1087 1088config ARCH_RANDOM 1089 def_bool n 1090 1091source "net/Kconfig" 1092 1093source "drivers/Kconfig" 1094 1095source "fs/Kconfig" 1096 1097source "lib/Kconfig" 1098 1099source "arch/powerpc/Kconfig.debug" 1100 1101source "security/Kconfig" 1102 1103config KEYS_COMPAT 1104 bool 1105 depends on COMPAT && KEYS 1106 default y 1107 1108source "crypto/Kconfig" 1109 1110config PPC_LIB_RHEAP 1111 bool 1112 1113source "arch/powerpc/kvm/Kconfig" 1114 1115source "kernel/livepatch/Kconfig" 1116