1source "arch/powerpc/platforms/Kconfig.cputype" 2 3config PPC32 4 bool 5 default y if !PPC64 6 7config 32BIT 8 bool 9 default y if PPC32 10 11config 64BIT 12 bool 13 default y if PPC64 14 15config ARCH_PHYS_ADDR_T_64BIT 16 def_bool PPC64 || PHYS_64BIT 17 18config ARCH_DMA_ADDR_T_64BIT 19 def_bool ARCH_PHYS_ADDR_T_64BIT 20 21config MMU 22 bool 23 default y 24 25config HAVE_SETUP_PER_CPU_AREA 26 def_bool PPC64 27 28config NEED_PER_CPU_EMBED_FIRST_CHUNK 29 def_bool PPC64 30 31config NR_IRQS 32 int "Number of virtual interrupt numbers" 33 range 32 32768 34 default "512" 35 help 36 This defines the number of virtual interrupt numbers the kernel 37 can manage. Virtual interrupt numbers are what you see in 38 /proc/interrupts. If you configure your system to have too few, 39 drivers will fail to load or worse - handle with care. 40 41config STACKTRACE_SUPPORT 42 bool 43 default y 44 45config TRACE_IRQFLAGS_SUPPORT 46 bool 47 default y 48 49config LOCKDEP_SUPPORT 50 bool 51 default y 52 53config RWSEM_GENERIC_SPINLOCK 54 bool 55 56config RWSEM_XCHGADD_ALGORITHM 57 bool 58 default y 59 60config GENERIC_LOCKBREAK 61 bool 62 default y 63 depends on SMP && PREEMPT 64 65config ARCH_HAS_ILOG2_U32 66 bool 67 default y 68 69config ARCH_HAS_ILOG2_U64 70 bool 71 default y if 64BIT 72 73config GENERIC_HWEIGHT 74 bool 75 default y 76 77config ARCH_HAS_DMA_SET_COHERENT_MASK 78 bool 79 80config PPC 81 bool 82 default y 83 select ARCH_MIGHT_HAVE_PC_PARPORT 84 select ARCH_MIGHT_HAVE_PC_SERIO 85 select BINFMT_ELF 86 select ARCH_HAS_ELF_RANDOMIZE 87 select OF 88 select OF_EARLY_FLATTREE 89 select OF_RESERVED_MEM 90 select HAVE_FTRACE_MCOUNT_RECORD 91 select HAVE_DYNAMIC_FTRACE 92 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 93 select HAVE_FUNCTION_TRACER 94 select HAVE_FUNCTION_GRAPH_TRACER 95 select SYSCTL_EXCEPTION_TRACE 96 select VIRT_TO_BUS if !PPC64 97 select HAVE_IDE 98 select HAVE_IOREMAP_PROT 99 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 100 select HAVE_KPROBES 101 select HAVE_ARCH_KGDB 102 select HAVE_KRETPROBES 103 select HAVE_ARCH_TRACEHOOK 104 select HAVE_MEMBLOCK 105 select HAVE_MEMBLOCK_NODE_MAP 106 select HAVE_DMA_API_DEBUG 107 select HAVE_OPROFILE 108 select HAVE_DEBUG_KMEMLEAK 109 select ARCH_HAS_SG_CHAIN 110 select GENERIC_ATOMIC64 if PPC32 111 select HAVE_PERF_EVENTS 112 select HAVE_PERF_REGS 113 select HAVE_PERF_USER_STACK_DUMP 114 select HAVE_REGS_AND_STACK_ACCESS_API 115 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 116 select ARCH_WANT_IPC_PARSE_VERSION 117 select SPARSE_IRQ 118 select IRQ_DOMAIN 119 select GENERIC_IRQ_SHOW 120 select GENERIC_IRQ_SHOW_LEVEL 121 select IRQ_FORCED_THREADING 122 select HAVE_RCU_TABLE_FREE if SMP 123 select HAVE_SYSCALL_TRACEPOINTS 124 select HAVE_CBPF_JIT if !PPC64 125 select HAVE_EBPF_JIT if PPC64 126 select HAVE_ARCH_JUMP_LABEL 127 select ARCH_HAVE_NMI_SAFE_CMPXCHG 128 select ARCH_HAS_GCOV_PROFILE_ALL 129 select GENERIC_SMP_IDLE_THREAD 130 select GENERIC_CMOS_UPDATE 131 select GENERIC_TIME_VSYSCALL_OLD 132 select GENERIC_CLOCKEVENTS 133 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 134 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 135 select GENERIC_STRNCPY_FROM_USER 136 select GENERIC_STRNLEN_USER 137 select HAVE_MOD_ARCH_SPECIFIC 138 select MODULES_USE_ELF_RELA 139 select CLONE_BACKWARDS 140 select ARCH_USE_BUILTIN_BSWAP 141 select OLD_SIGSUSPEND 142 select OLD_SIGACTION if PPC32 143 select HAVE_DEBUG_STACKOVERFLOW 144 select HAVE_IRQ_EXIT_ON_IRQ_STACK 145 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 146 select HAVE_ARCH_AUDITSYSCALL 147 select ARCH_SUPPORTS_ATOMIC_RMW 148 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 149 select NO_BOOTMEM 150 select HAVE_GENERIC_RCU_GUP 151 select HAVE_PERF_EVENTS_NMI if PPC64 152 select HAVE_NMI if PERF_EVENTS 153 select EDAC_SUPPORT 154 select EDAC_ATOMIC_SCRUB 155 select ARCH_HAS_DMA_SET_COHERENT_MASK 156 select ARCH_HAS_DEVMEM_IS_ALLOWED 157 select HAVE_ARCH_SECCOMP_FILTER 158 select ARCH_HAS_UBSAN_SANITIZE_ALL 159 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 160 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 161 select GENERIC_CPU_AUTOPROBE 162 select HAVE_VIRT_CPU_ACCOUNTING 163 select HAVE_ARCH_HARDENED_USERCOPY 164 select HAVE_KERNEL_GZIP 165 166config GENERIC_CSUM 167 def_bool CPU_LITTLE_ENDIAN 168 169config EARLY_PRINTK 170 bool 171 default y 172 173config PANIC_TIMEOUT 174 int 175 default 180 176 177config COMPAT 178 bool 179 default y if PPC64 180 select COMPAT_BINFMT_ELF 181 select ARCH_WANT_OLD_COMPAT_IPC 182 select COMPAT_OLD_SIGACTION 183 184config SYSVIPC_COMPAT 185 bool 186 depends on COMPAT && SYSVIPC 187 default y 188 189# All PPC32s use generic nvram driver through ppc_md 190config GENERIC_NVRAM 191 bool 192 default y if PPC32 193 194config SCHED_OMIT_FRAME_POINTER 195 bool 196 default y 197 198config ARCH_MAY_HAVE_PC_FDC 199 bool 200 default PCI 201 202config PPC_UDBG_16550 203 bool 204 default n 205 206config GENERIC_TBSYNC 207 bool 208 default y if PPC32 && SMP 209 default n 210 211config AUDIT_ARCH 212 bool 213 default y 214 215config GENERIC_BUG 216 bool 217 default y 218 depends on BUG 219 220config SYS_SUPPORTS_APM_EMULATION 221 default y if PMAC_APM_EMU 222 bool 223 224config EPAPR_BOOT 225 bool 226 help 227 Used to allow a board to specify it wants an ePAPR compliant wrapper. 228 default n 229 230config DEFAULT_UIMAGE 231 bool 232 help 233 Used to allow a board to specify it wants a uImage built by default 234 default n 235 236config ARCH_HIBERNATION_POSSIBLE 237 bool 238 default y 239 240config ARCH_SUSPEND_POSSIBLE 241 def_bool y 242 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 243 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 244 || 44x || 40x 245 246config PPC_DCR_NATIVE 247 bool 248 default n 249 250config PPC_DCR_MMIO 251 bool 252 default n 253 254config PPC_DCR 255 bool 256 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 257 default y 258 259config PPC_OF_PLATFORM_PCI 260 bool 261 depends on PCI 262 depends on PPC64 # not supported on 32 bits yet 263 default n 264 265config ARCH_SUPPORTS_DEBUG_PAGEALLOC 266 depends on PPC32 || PPC_STD_MMU_64 267 def_bool y 268 269config ARCH_SUPPORTS_UPROBES 270 def_bool y 271 272config PPC_ADV_DEBUG_REGS 273 bool 274 depends on 40x || BOOKE 275 default y 276 277config PPC_ADV_DEBUG_IACS 278 int 279 depends on PPC_ADV_DEBUG_REGS 280 default 4 if 44x 281 default 2 282 283config PPC_ADV_DEBUG_DACS 284 int 285 depends on PPC_ADV_DEBUG_REGS 286 default 2 287 288config PPC_ADV_DEBUG_DVCS 289 int 290 depends on PPC_ADV_DEBUG_REGS 291 default 2 if 44x 292 default 0 293 294config PPC_ADV_DEBUG_DAC_RANGE 295 bool 296 depends on PPC_ADV_DEBUG_REGS && 44x 297 default y 298 299config PPC_EMULATE_SSTEP 300 bool 301 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT 302 303config ZONE_DMA32 304 bool 305 default y if PPC64 306 307config PGTABLE_LEVELS 308 int 309 default 2 if !PPC64 310 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 311 default 4 312 313source "init/Kconfig" 314 315source "kernel/Kconfig.freezer" 316 317source "arch/powerpc/sysdev/Kconfig" 318source "arch/powerpc/platforms/Kconfig" 319 320menu "Kernel options" 321 322config HIGHMEM 323 bool "High memory support" 324 depends on PPC32 325 326source kernel/Kconfig.hz 327source kernel/Kconfig.preempt 328source "fs/Kconfig.binfmt" 329 330config HUGETLB_PAGE_SIZE_VARIABLE 331 bool 332 depends on HUGETLB_PAGE 333 default y 334 335config MATH_EMULATION 336 bool "Math emulation" 337 depends on 4xx || 8xx || PPC_MPC832x || BOOKE 338 ---help--- 339 Some PowerPC chips designed for embedded applications do not have 340 a floating-point unit and therefore do not implement the 341 floating-point instructions in the PowerPC instruction set. If you 342 say Y here, the kernel will include code to emulate a floating-point 343 unit, which will allow programs that use floating-point 344 instructions to run. 345 346 This is also useful to emulate missing (optional) instructions 347 such as fsqrt on cores that do have an FPU but do not implement 348 them (such as Freescale BookE). 349 350choice 351 prompt "Math emulation options" 352 default MATH_EMULATION_FULL 353 depends on MATH_EMULATION 354 355config MATH_EMULATION_FULL 356 bool "Emulate all the floating point instructions" 357 ---help--- 358 Select this option will enable the kernel to support to emulate 359 all the floating point instructions. If your SoC doesn't have 360 a FPU, you should select this. 361 362config MATH_EMULATION_HW_UNIMPLEMENTED 363 bool "Just emulate the FPU unimplemented instructions" 364 ---help--- 365 Select this if you know there does have a hardware FPU on your 366 SoC, but some floating point instructions are not implemented by that. 367 368endchoice 369 370config PPC_TRANSACTIONAL_MEM 371 bool "Transactional Memory support for POWERPC" 372 depends on PPC_BOOK3S_64 373 depends on SMP 374 select ALTIVEC 375 select VSX 376 default n 377 ---help--- 378 Support user-mode Transactional Memory on POWERPC. 379 380config DISABLE_MPROFILE_KERNEL 381 bool "Disable use of mprofile-kernel for kernel tracing" 382 depends on PPC64 && CPU_LITTLE_ENDIAN 383 default y 384 help 385 Selecting this options disables use of the mprofile-kernel ABI for 386 kernel tracing. That will cause options such as live patching 387 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 388 be disabled also. 389 390 If you have a toolchain which supports mprofile-kernel, then you can 391 enable this. Otherwise leave it disabled. If you're not sure, say 392 "N". 393 394config MPROFILE_KERNEL 395 depends on PPC64 && CPU_LITTLE_ENDIAN 396 def_bool !DISABLE_MPROFILE_KERNEL 397 398config IOMMU_HELPER 399 def_bool PPC64 400 401config SWIOTLB 402 bool "SWIOTLB support" 403 default n 404 select IOMMU_HELPER 405 ---help--- 406 Support for IO bounce buffering for systems without an IOMMU. 407 This allows us to DMA to the full physical address space on 408 platforms where the size of a physical address is larger 409 than the bus address. Not all platforms support this. 410 411config HOTPLUG_CPU 412 bool "Support for enabling/disabling CPUs" 413 depends on SMP && (PPC_PSERIES || \ 414 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 415 ---help--- 416 Say Y here to be able to disable and re-enable individual 417 CPUs at runtime on SMP machines. 418 419 Say N if you are unsure. 420 421config ARCH_CPU_PROBE_RELEASE 422 def_bool y 423 depends on HOTPLUG_CPU 424 425config ARCH_ENABLE_MEMORY_HOTPLUG 426 def_bool y 427 428config ARCH_HAS_WALK_MEMORY 429 def_bool y 430 431config ARCH_ENABLE_MEMORY_HOTREMOVE 432 def_bool y 433 434config PPC64_SUPPORTS_MEMORY_FAILURE 435 bool "Add support for memory hwpoison" 436 depends on PPC_BOOK3S_64 437 default "y" if PPC_POWERNV 438 select ARCH_SUPPORTS_MEMORY_FAILURE 439 440config KEXEC 441 bool "kexec system call" 442 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 443 select KEXEC_CORE 444 help 445 kexec is a system call that implements the ability to shutdown your 446 current kernel, and to start another kernel. It is like a reboot 447 but it is independent of the system firmware. And like a reboot 448 you can start any kernel with it, not just Linux. 449 450 The name comes from the similarity to the exec system call. 451 452 It is an ongoing process to be certain the hardware in a machine 453 is properly shutdown, so do not be surprised if this code does not 454 initially work for you. As of this writing the exact hardware 455 interface is strongly in flux, so no good recommendation can be 456 made. 457 458config RELOCATABLE 459 bool "Build a relocatable kernel" 460 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE)) 461 select NONSTATIC_KERNEL 462 help 463 This builds a kernel image that is capable of running at the 464 location the kernel is loaded at. For ppc32, there is no any 465 alignment restrictions, and this feature is a superset of 466 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 467 16k-aligned base address. The kernel is linked as a 468 position-independent executable (PIE) and contains dynamic relocations 469 which are processed early in the bootup process. 470 471 One use is for the kexec on panic case where the recovery kernel 472 must live at a different physical address than the primary 473 kernel. 474 475 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 476 it has been loaded at and the compile time physical addresses 477 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 478 setting can still be useful to bootwrappers that need to know the 479 load address of the kernel (eg. u-boot/mkimage). 480 481config CRASH_DUMP 482 bool "Build a kdump crash kernel" 483 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 484 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 485 help 486 Build a kernel suitable for use as a kdump capture kernel. 487 The same kernel binary can be used as production kernel and dump 488 capture kernel. 489 490config FA_DUMP 491 bool "Firmware-assisted dump" 492 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 493 help 494 A robust mechanism to get reliable kernel crash dump with 495 assistance from firmware. This approach does not use kexec, 496 instead firmware assists in booting the kdump kernel 497 while preserving memory contents. Firmware-assisted dump 498 is meant to be a kdump replacement offering robustness and 499 speed not possible without system firmware assistance. 500 501 If unsure, say "N" 502 503config IRQ_ALL_CPUS 504 bool "Distribute interrupts on all CPUs by default" 505 depends on SMP 506 help 507 This option gives the kernel permission to distribute IRQs across 508 multiple CPUs. Saying N here will route all IRQs to the first 509 CPU. Generally saying Y is safe, although some problems have been 510 reported with SMP Power Macintoshes with this option enabled. 511 512config NUMA 513 bool "NUMA support" 514 depends on PPC64 515 default y if SMP && PPC_PSERIES 516 517config NODES_SHIFT 518 int 519 default "8" if PPC64 520 default "4" 521 depends on NEED_MULTIPLE_NODES 522 523config USE_PERCPU_NUMA_NODE_ID 524 def_bool y 525 depends on NUMA 526 527config HAVE_MEMORYLESS_NODES 528 def_bool y 529 depends on NUMA 530 531config ARCH_SELECT_MEMORY_MODEL 532 def_bool y 533 depends on PPC64 534 535config ARCH_FLATMEM_ENABLE 536 def_bool y 537 depends on (PPC64 && !NUMA) || PPC32 538 539config ARCH_SPARSEMEM_ENABLE 540 def_bool y 541 depends on PPC64 542 select SPARSEMEM_VMEMMAP_ENABLE 543 544config ARCH_SPARSEMEM_DEFAULT 545 def_bool y 546 depends on (SMP && PPC_PSERIES) || PPC_PS3 547 548config SYS_SUPPORTS_HUGETLBFS 549 bool 550 551source "mm/Kconfig" 552 553config ARCH_MEMORY_PROBE 554 def_bool y 555 depends on MEMORY_HOTPLUG 556 557# Some NUMA nodes have memory ranges that span 558# other nodes. Even though a pfn is valid and 559# between a node's start and end pfns, it may not 560# reside on that node. See memmap_init_zone() 561# for details. 562config NODES_SPAN_OTHER_NODES 563 def_bool y 564 depends on NEED_MULTIPLE_NODES 565 566config STDBINUTILS 567 bool "Using standard binutils settings" 568 depends on 44x 569 default y 570 help 571 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 572 Note, that kernel will be able to run only those applications, 573 which had been compiled using binutils later than 2.17.50.0.3 with 574 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 575 the older binutils, you can patch them with a trivial patch, which 576 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 577 578choice 579 prompt "Page size" 580 default PPC_4K_PAGES 581 help 582 Select the kernel logical page size. Increasing the page size 583 will reduce software overhead at each page boundary, allow 584 hardware prefetch mechanisms to be more effective, and allow 585 larger dma transfers increasing IO efficiency and reducing 586 overhead. However the utilization of memory will increase. 587 For example, each cached file will using a multiple of the 588 page size to hold its contents and the difference between the 589 end of file and the end of page is wasted. 590 591 Some dedicated systems, such as software raid serving with 592 accelerated calculations, have shown significant increases. 593 594 If you configure a 64 bit kernel for 64k pages but the 595 processor does not support them, then the kernel will simulate 596 them with 4k pages, loading them on demand, but with the 597 reduced software overhead and larger internal fragmentation. 598 For the 32 bit kernel, a large page option will not be offered 599 unless it is supported by the configured processor. 600 601 If unsure, choose 4K_PAGES. 602 603config PPC_4K_PAGES 604 bool "4k page size" 605 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 606 607config PPC_16K_PAGES 608 bool "16k page size" 609 depends on 44x || PPC_8xx 610 611config PPC_64K_PAGES 612 bool "64k page size" 613 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 614 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 615 616config PPC_256K_PAGES 617 bool "256k page size" 618 depends on 44x && !STDBINUTILS 619 help 620 Make the page size 256k. 621 622 As the ELF standard only requires alignment to support page 623 sizes up to 64k, you will need to compile all of your user 624 space applications with a non-standard binutils settings 625 (see the STDBINUTILS description for details). 626 627 Say N unless you know what you are doing. 628 629endchoice 630 631config FORCE_MAX_ZONEORDER 632 int "Maximum zone order" 633 range 8 9 if PPC64 && PPC_64K_PAGES 634 default "9" if PPC64 && PPC_64K_PAGES 635 range 13 13 if PPC64 && !PPC_64K_PAGES 636 default "13" if PPC64 && !PPC_64K_PAGES 637 range 9 64 if PPC32 && PPC_16K_PAGES 638 default "9" if PPC32 && PPC_16K_PAGES 639 range 7 64 if PPC32 && PPC_64K_PAGES 640 default "7" if PPC32 && PPC_64K_PAGES 641 range 5 64 if PPC32 && PPC_256K_PAGES 642 default "5" if PPC32 && PPC_256K_PAGES 643 range 11 64 644 default "11" 645 help 646 The kernel memory allocator divides physically contiguous memory 647 blocks into "zones", where each zone is a power of two number of 648 pages. This option selects the largest power of two that the kernel 649 keeps in the memory allocator. If you need to allocate very large 650 blocks of physically contiguous memory, then you may need to 651 increase this value. 652 653 This config option is actually maximum order plus one. For example, 654 a value of 11 means that the largest free memory block is 2^10 pages. 655 656 The page size is not necessarily 4KB. For example, on 64-bit 657 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 658 this in mind when choosing a value for this option. 659 660config PPC_SUBPAGE_PROT 661 bool "Support setting protections for 4k subpages" 662 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 663 help 664 This option adds support for a system call to allow user programs 665 to set access permissions (read/write, readonly, or no access) 666 on the 4k subpages of each 64k page. 667 668config PPC_COPRO_BASE 669 bool 670 default n 671 672config SCHED_SMT 673 bool "SMT (Hyperthreading) scheduler support" 674 depends on PPC64 && SMP 675 help 676 SMT scheduler support improves the CPU scheduler's decision making 677 when dealing with POWER5 cpus at a cost of slightly increased 678 overhead in some places. If unsure say N here. 679 680config PPC_DENORMALISATION 681 bool "PowerPC denormalisation exception handling" 682 depends on PPC_BOOK3S_64 683 default "y" if PPC_POWERNV 684 ---help--- 685 Add support for handling denormalisation of single precision 686 values. Useful for bare metal only. If unsure say Y here. 687 688config CMDLINE_BOOL 689 bool "Default bootloader kernel arguments" 690 691config CMDLINE 692 string "Initial kernel command string" 693 depends on CMDLINE_BOOL 694 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 695 help 696 On some platforms, there is currently no way for the boot loader to 697 pass arguments to the kernel. For these platforms, you can supply 698 some command-line options at build time by entering them here. In 699 most cases you will need to specify the root device here. 700 701config CMDLINE_FORCE 702 bool "Always use the default kernel command string" 703 depends on CMDLINE_BOOL 704 help 705 Always use the default kernel command string, even if the boot 706 loader passes other arguments to the kernel. 707 This is useful if you cannot or don't want to change the 708 command-line options your boot loader passes to the kernel. 709 710config EXTRA_TARGETS 711 string "Additional default image types" 712 help 713 List additional targets to be built by the bootwrapper here (separated 714 by spaces). This is useful for targets that depend of device tree 715 files in the .dts directory. 716 717 Targets in this list will be build as part of the default build 718 target, or when the user does a 'make zImage' or a 719 'make zImage.initrd'. 720 721 If unsure, leave blank 722 723config ARCH_WANTS_FREEZER_CONTROL 724 def_bool y 725 depends on ADB_PMU 726 727source kernel/power/Kconfig 728 729config SECCOMP 730 bool "Enable seccomp to safely compute untrusted bytecode" 731 depends on PROC_FS 732 default y 733 help 734 This kernel feature is useful for number crunching applications 735 that may need to compute untrusted bytecode during their 736 execution. By using pipes or other transports made available to 737 the process as file descriptors supporting the read/write 738 syscalls, it's possible to isolate those applications in 739 their own address space using seccomp. Once seccomp is 740 enabled via /proc/<pid>/seccomp, it cannot be disabled 741 and the task is only allowed to execute a few safe syscalls 742 defined by each seccomp mode. 743 744 If unsure, say Y. Only embedded should say N here. 745 746endmenu 747 748config ISA_DMA_API 749 bool 750 default PCI 751 752menu "Bus options" 753 754config ISA 755 bool "Support for ISA-bus hardware" 756 depends on PPC_CHRP 757 select PPC_I8259 758 help 759 Find out whether you have ISA slots on your motherboard. ISA is the 760 name of a bus system, i.e. the way the CPU talks to the other stuff 761 inside your box. If you have an Apple machine, say N here; if you 762 have an IBM RS/6000 or pSeries machine, say Y. If you have an 763 embedded board, consult your board documentation. 764 765config ZONE_DMA 766 bool 767 default y 768 769config NEED_DMA_MAP_STATE 770 def_bool (PPC64 || NOT_COHERENT_CACHE) 771 772config NEED_SG_DMA_LENGTH 773 def_bool y 774 775config GENERIC_ISA_DMA 776 bool 777 depends on ISA_DMA_API 778 default y 779 780config PPC_INDIRECT_PCI 781 bool 782 depends on PCI 783 default y if 40x || 44x 784 default n 785 786config EISA 787 bool 788 789config SBUS 790 bool 791 792config FSL_SOC 793 bool 794 795config FSL_PCI 796 bool 797 select PPC_INDIRECT_PCI 798 select PCI_QUIRKS 799 800config FSL_PMC 801 bool 802 default y 803 depends on SUSPEND && (PPC_85xx || PPC_86xx) 804 help 805 Freescale MPC85xx/MPC86xx power management controller support 806 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 807 808config PPC4xx_CPM 809 bool 810 default y 811 depends on SUSPEND && (44x || 40x) 812 help 813 PPC4xx Clock Power Management (CPM) support (suspend/resume). 814 It also enables support for two different idle states (idle-wait 815 and idle-doze). 816 817config 4xx_SOC 818 bool 819 820config FSL_LBC 821 bool "Freescale Local Bus support" 822 help 823 Enables reporting of errors from the Freescale local bus 824 controller. Also contains some common code used by 825 drivers for specific local bus peripherals. 826 827config FSL_GTM 828 bool 829 depends on PPC_83xx || QUICC_ENGINE || CPM2 830 help 831 Freescale General-purpose Timers support 832 833# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 834config MCA 835 bool 836 837# Platforms that what PCI turned unconditionally just do select PCI 838# in their config node. Platforms that want to choose at config 839# time should select PPC_PCI_CHOICE 840config PPC_PCI_CHOICE 841 bool 842 843config PCI 844 bool "PCI support" if PPC_PCI_CHOICE 845 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 846 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 847 default PCI_QSPAN if !4xx && !CPM2 && 8xx 848 select GENERIC_PCI_IOMAP 849 help 850 Find out whether your system includes a PCI bus. PCI is the name of 851 a bus system, i.e. the way the CPU talks to the other stuff inside 852 your box. If you say Y here, the kernel will include drivers and 853 infrastructure code to support PCI bus devices. 854 855config PCI_DOMAINS 856 def_bool PCI 857 858config PCI_SYSCALL 859 def_bool PCI 860 861config PCI_QSPAN 862 bool "QSpan PCI" 863 depends on !4xx && !CPM2 && 8xx 864 select PPC_I8259 865 help 866 Say Y here if you have a system based on a Motorola 8xx-series 867 embedded processor with a QSPAN PCI interface, otherwise say N. 868 869config PCI_8260 870 bool 871 depends on PCI && 8260 872 select PPC_INDIRECT_PCI 873 default y 874 875source "drivers/pci/Kconfig" 876 877source "drivers/pcmcia/Kconfig" 878 879config HAS_RAPIDIO 880 bool 881 default n 882 883config RAPIDIO 884 tristate "RapidIO support" 885 depends on HAS_RAPIDIO || PCI 886 help 887 If you say Y here, the kernel will include drivers and 888 infrastructure code to support RapidIO interconnect devices. 889 890config FSL_RIO 891 bool "Freescale Embedded SRIO Controller support" 892 depends on RAPIDIO = y && HAS_RAPIDIO 893 default "n" 894 ---help--- 895 Include support for RapidIO controller on Freescale embedded 896 processors (MPC8548, MPC8641, etc). 897 898source "drivers/rapidio/Kconfig" 899 900endmenu 901 902config NONSTATIC_KERNEL 903 bool 904 default n 905 906menu "Advanced setup" 907 depends on PPC32 908 909config ADVANCED_OPTIONS 910 bool "Prompt for advanced kernel configuration options" 911 help 912 This option will enable prompting for a variety of advanced kernel 913 configuration options. These options can cause the kernel to not 914 work if they are set incorrectly, but can be used to optimize certain 915 aspects of kernel memory management. 916 917 Unless you know what you are doing, say N here. 918 919comment "Default settings for advanced configuration options are used" 920 depends on !ADVANCED_OPTIONS 921 922config LOWMEM_SIZE_BOOL 923 bool "Set maximum low memory" 924 depends on ADVANCED_OPTIONS 925 help 926 This option allows you to set the maximum amount of memory which 927 will be used as "low memory", that is, memory which the kernel can 928 access directly, without having to set up a kernel virtual mapping. 929 This can be useful in optimizing the layout of kernel virtual 930 memory. 931 932 Say N here unless you know what you are doing. 933 934config LOWMEM_SIZE 935 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 936 default "0x30000000" 937 938config LOWMEM_CAM_NUM_BOOL 939 bool "Set number of CAMs to use to map low memory" 940 depends on ADVANCED_OPTIONS && FSL_BOOKE 941 help 942 This option allows you to set the maximum number of CAM slots that 943 will be used to map low memory. There are a limited number of slots 944 available and even more limited number that will fit in the L1 MMU. 945 However, using more entries will allow mapping more low memory. This 946 can be useful in optimizing the layout of kernel virtual memory. 947 948 Say N here unless you know what you are doing. 949 950config LOWMEM_CAM_NUM 951 depends on FSL_BOOKE 952 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 953 default 3 954 955config DYNAMIC_MEMSTART 956 bool "Enable page aligned dynamic load address for kernel" 957 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 958 select NONSTATIC_KERNEL 959 help 960 This option enables the kernel to be loaded at any page aligned 961 physical address. The kernel creates a mapping from KERNELBASE to 962 the address where the kernel is loaded. The page size here implies 963 the TLB page size of the mapping for kernel on the particular platform. 964 Please refer to the init code for finding the TLB page size. 965 966 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 967 kernel image, where the only restriction is the page aligned kernel 968 load address. When this option is enabled, the compile time physical 969 address CONFIG_PHYSICAL_START is ignored. 970 971 This option is overridden by CONFIG_RELOCATABLE 972 973config PAGE_OFFSET_BOOL 974 bool "Set custom page offset address" 975 depends on ADVANCED_OPTIONS 976 help 977 This option allows you to set the kernel virtual address at which 978 the kernel will map low memory. This can be useful in optimizing 979 the virtual memory layout of the system. 980 981 Say N here unless you know what you are doing. 982 983config PAGE_OFFSET 984 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 985 default "0xc0000000" 986 987config KERNEL_START_BOOL 988 bool "Set custom kernel base address" 989 depends on ADVANCED_OPTIONS 990 help 991 This option allows you to set the kernel virtual address at which 992 the kernel will be loaded. Normally this should match PAGE_OFFSET 993 however there are times (like kdump) that one might not want them 994 to be the same. 995 996 Say N here unless you know what you are doing. 997 998config KERNEL_START 999 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1000 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1001 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1002 default "0xc0000000" 1003 1004config PHYSICAL_START_BOOL 1005 bool "Set physical address where the kernel is loaded" 1006 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1007 help 1008 This gives the physical address where the kernel is loaded. 1009 1010 Say N here unless you know what you are doing. 1011 1012config PHYSICAL_START 1013 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1014 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1015 default "0x00000000" 1016 1017config PHYSICAL_ALIGN 1018 hex 1019 default "0x04000000" if FSL_BOOKE 1020 help 1021 This value puts the alignment restrictions on physical address 1022 where kernel is loaded and run from. Kernel is compiled for an 1023 address which meets above alignment restriction. 1024 1025config TASK_SIZE_BOOL 1026 bool "Set custom user task size" 1027 depends on ADVANCED_OPTIONS 1028 help 1029 This option allows you to set the amount of virtual address space 1030 allocated to user tasks. This can be useful in optimizing the 1031 virtual memory layout of the system. 1032 1033 Say N here unless you know what you are doing. 1034 1035config TASK_SIZE 1036 hex "Size of user task space" if TASK_SIZE_BOOL 1037 default "0x80000000" if PPC_8xx 1038 default "0xc0000000" 1039 1040config CONSISTENT_SIZE_BOOL 1041 bool "Set custom consistent memory pool size" 1042 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1043 help 1044 This option allows you to set the size of the 1045 consistent memory pool. This pool of virtual memory 1046 is used to make consistent memory allocations. 1047 1048config CONSISTENT_SIZE 1049 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1050 default "0x00200000" if NOT_COHERENT_CACHE 1051 1052config PIN_TLB 1053 bool "Pinned Kernel TLBs (860 ONLY)" 1054 depends on ADVANCED_OPTIONS && 8xx 1055 1056config PIN_TLB_IMMR 1057 bool "Pinned TLB for IMMR" 1058 depends on PIN_TLB 1059 default y 1060endmenu 1061 1062if PPC64 1063# This value must have zeroes in the bottom 60 bits otherwise lots will break 1064config PAGE_OFFSET 1065 hex 1066 default "0xc000000000000000" 1067config KERNEL_START 1068 hex 1069 default "0xc000000000000000" 1070config PHYSICAL_START 1071 hex 1072 default "0x00000000" 1073endif 1074 1075config ARCH_RANDOM 1076 def_bool n 1077 1078source "net/Kconfig" 1079 1080source "drivers/Kconfig" 1081 1082source "fs/Kconfig" 1083 1084source "lib/Kconfig" 1085 1086source "arch/powerpc/Kconfig.debug" 1087 1088source "security/Kconfig" 1089 1090config KEYS_COMPAT 1091 bool 1092 depends on COMPAT && KEYS 1093 default y 1094 1095source "crypto/Kconfig" 1096 1097config PPC_LIB_RHEAP 1098 bool 1099 1100source "arch/powerpc/kvm/Kconfig" 1101 1102source "kernel/livepatch/Kconfig" 1103