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 BUILDTIME_EXTABLE_SORT 84 select ARCH_MIGHT_HAVE_PC_PARPORT 85 select ARCH_MIGHT_HAVE_PC_SERIO 86 select BINFMT_ELF 87 select ARCH_HAS_ELF_RANDOMIZE 88 select OF 89 select OF_EARLY_FLATTREE 90 select OF_RESERVED_MEM 91 select HAVE_FTRACE_MCOUNT_RECORD 92 select HAVE_DYNAMIC_FTRACE 93 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 94 select HAVE_FUNCTION_TRACER 95 select HAVE_FUNCTION_GRAPH_TRACER 96 select SYSCTL_EXCEPTION_TRACE 97 select VIRT_TO_BUS if !PPC64 98 select HAVE_IDE 99 select HAVE_IOREMAP_PROT 100 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 101 select HAVE_KPROBES 102 select HAVE_ARCH_KGDB 103 select HAVE_KRETPROBES 104 select HAVE_ARCH_TRACEHOOK 105 select HAVE_MEMBLOCK 106 select HAVE_MEMBLOCK_NODE_MAP 107 select HAVE_DMA_API_DEBUG 108 select HAVE_OPROFILE 109 select HAVE_DEBUG_KMEMLEAK 110 select ARCH_HAS_SG_CHAIN 111 select GENERIC_ATOMIC64 if PPC32 112 select HAVE_PERF_EVENTS 113 select HAVE_PERF_REGS 114 select HAVE_PERF_USER_STACK_DUMP 115 select HAVE_REGS_AND_STACK_ACCESS_API 116 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 117 select ARCH_WANT_IPC_PARSE_VERSION 118 select SPARSE_IRQ 119 select IRQ_DOMAIN 120 select GENERIC_IRQ_SHOW 121 select GENERIC_IRQ_SHOW_LEVEL 122 select IRQ_FORCED_THREADING 123 select HAVE_RCU_TABLE_FREE if SMP 124 select HAVE_SYSCALL_TRACEPOINTS 125 select HAVE_CBPF_JIT if !PPC64 126 select HAVE_EBPF_JIT if PPC64 127 select HAVE_ARCH_JUMP_LABEL 128 select ARCH_HAVE_NMI_SAFE_CMPXCHG 129 select ARCH_HAS_GCOV_PROFILE_ALL 130 select GENERIC_SMP_IDLE_THREAD 131 select GENERIC_CMOS_UPDATE 132 select GENERIC_TIME_VSYSCALL_OLD 133 select GENERIC_CLOCKEVENTS 134 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 135 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 136 select GENERIC_STRNCPY_FROM_USER 137 select GENERIC_STRNLEN_USER 138 select HAVE_MOD_ARCH_SPECIFIC 139 select MODULES_USE_ELF_RELA 140 select CLONE_BACKWARDS 141 select ARCH_USE_BUILTIN_BSWAP 142 select OLD_SIGSUSPEND 143 select OLD_SIGACTION if PPC32 144 select HAVE_DEBUG_STACKOVERFLOW 145 select HAVE_IRQ_EXIT_ON_IRQ_STACK 146 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 147 select HAVE_ARCH_AUDITSYSCALL 148 select ARCH_SUPPORTS_ATOMIC_RMW 149 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 150 select NO_BOOTMEM 151 select HAVE_GENERIC_RCU_GUP 152 select HAVE_PERF_EVENTS_NMI if PPC64 153 select HAVE_NMI if PERF_EVENTS 154 select EDAC_SUPPORT 155 select EDAC_ATOMIC_SCRUB 156 select ARCH_HAS_DMA_SET_COHERENT_MASK 157 select ARCH_HAS_DEVMEM_IS_ALLOWED 158 select HAVE_ARCH_SECCOMP_FILTER 159 select ARCH_HAS_UBSAN_SANITIZE_ALL 160 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 161 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 162 select GENERIC_CPU_AUTOPROBE 163 select HAVE_VIRT_CPU_ACCOUNTING 164 select HAVE_ARCH_HARDENED_USERCOPY 165 select HAVE_KERNEL_GZIP 166 167config GENERIC_CSUM 168 def_bool CPU_LITTLE_ENDIAN 169 170config EARLY_PRINTK 171 bool 172 default y 173 174config PANIC_TIMEOUT 175 int 176 default 180 177 178config COMPAT 179 bool 180 default y if PPC64 181 select COMPAT_BINFMT_ELF 182 select ARCH_WANT_OLD_COMPAT_IPC 183 select COMPAT_OLD_SIGACTION 184 185config SYSVIPC_COMPAT 186 bool 187 depends on COMPAT && SYSVIPC 188 default y 189 190# All PPC32s use generic nvram driver through ppc_md 191config GENERIC_NVRAM 192 bool 193 default y if PPC32 194 195config SCHED_OMIT_FRAME_POINTER 196 bool 197 default y 198 199config ARCH_MAY_HAVE_PC_FDC 200 bool 201 default PCI 202 203config PPC_UDBG_16550 204 bool 205 default n 206 207config GENERIC_TBSYNC 208 bool 209 default y if PPC32 && SMP 210 default n 211 212config AUDIT_ARCH 213 bool 214 default y 215 216config GENERIC_BUG 217 bool 218 default y 219 depends on BUG 220 221config SYS_SUPPORTS_APM_EMULATION 222 default y if PMAC_APM_EMU 223 bool 224 225config EPAPR_BOOT 226 bool 227 help 228 Used to allow a board to specify it wants an ePAPR compliant wrapper. 229 default n 230 231config DEFAULT_UIMAGE 232 bool 233 help 234 Used to allow a board to specify it wants a uImage built by default 235 default n 236 237config ARCH_HIBERNATION_POSSIBLE 238 bool 239 default y 240 241config ARCH_SUSPEND_POSSIBLE 242 def_bool y 243 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 244 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 245 || 44x || 40x 246 247config PPC_DCR_NATIVE 248 bool 249 default n 250 251config PPC_DCR_MMIO 252 bool 253 default n 254 255config PPC_DCR 256 bool 257 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 258 default y 259 260config PPC_OF_PLATFORM_PCI 261 bool 262 depends on PCI 263 depends on PPC64 # not supported on 32 bits yet 264 default n 265 266config ARCH_SUPPORTS_DEBUG_PAGEALLOC 267 depends on PPC32 || PPC_STD_MMU_64 268 def_bool y 269 270config ARCH_SUPPORTS_UPROBES 271 def_bool y 272 273config PPC_ADV_DEBUG_REGS 274 bool 275 depends on 40x || BOOKE 276 default y 277 278config PPC_ADV_DEBUG_IACS 279 int 280 depends on PPC_ADV_DEBUG_REGS 281 default 4 if 44x 282 default 2 283 284config PPC_ADV_DEBUG_DACS 285 int 286 depends on PPC_ADV_DEBUG_REGS 287 default 2 288 289config PPC_ADV_DEBUG_DVCS 290 int 291 depends on PPC_ADV_DEBUG_REGS 292 default 2 if 44x 293 default 0 294 295config PPC_ADV_DEBUG_DAC_RANGE 296 bool 297 depends on PPC_ADV_DEBUG_REGS && 44x 298 default y 299 300config PPC_EMULATE_SSTEP 301 bool 302 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT 303 304config ZONE_DMA32 305 bool 306 default y if PPC64 307 308config PGTABLE_LEVELS 309 int 310 default 2 if !PPC64 311 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 312 default 4 313 314source "init/Kconfig" 315 316source "kernel/Kconfig.freezer" 317 318source "arch/powerpc/sysdev/Kconfig" 319source "arch/powerpc/platforms/Kconfig" 320 321menu "Kernel options" 322 323config HIGHMEM 324 bool "High memory support" 325 depends on PPC32 326 327source kernel/Kconfig.hz 328source kernel/Kconfig.preempt 329source "fs/Kconfig.binfmt" 330 331config HUGETLB_PAGE_SIZE_VARIABLE 332 bool 333 depends on HUGETLB_PAGE 334 default y 335 336config MATH_EMULATION 337 bool "Math emulation" 338 depends on 4xx || 8xx || PPC_MPC832x || BOOKE 339 ---help--- 340 Some PowerPC chips designed for embedded applications do not have 341 a floating-point unit and therefore do not implement the 342 floating-point instructions in the PowerPC instruction set. If you 343 say Y here, the kernel will include code to emulate a floating-point 344 unit, which will allow programs that use floating-point 345 instructions to run. 346 347 This is also useful to emulate missing (optional) instructions 348 such as fsqrt on cores that do have an FPU but do not implement 349 them (such as Freescale BookE). 350 351choice 352 prompt "Math emulation options" 353 default MATH_EMULATION_FULL 354 depends on MATH_EMULATION 355 356config MATH_EMULATION_FULL 357 bool "Emulate all the floating point instructions" 358 ---help--- 359 Select this option will enable the kernel to support to emulate 360 all the floating point instructions. If your SoC doesn't have 361 a FPU, you should select this. 362 363config MATH_EMULATION_HW_UNIMPLEMENTED 364 bool "Just emulate the FPU unimplemented instructions" 365 ---help--- 366 Select this if you know there does have a hardware FPU on your 367 SoC, but some floating point instructions are not implemented by that. 368 369endchoice 370 371config PPC_TRANSACTIONAL_MEM 372 bool "Transactional Memory support for POWERPC" 373 depends on PPC_BOOK3S_64 374 depends on SMP 375 select ALTIVEC 376 select VSX 377 default n 378 ---help--- 379 Support user-mode Transactional Memory on POWERPC. 380 381config DISABLE_MPROFILE_KERNEL 382 bool "Disable use of mprofile-kernel for kernel tracing" 383 depends on PPC64 && CPU_LITTLE_ENDIAN 384 default y 385 help 386 Selecting this options disables use of the mprofile-kernel ABI for 387 kernel tracing. That will cause options such as live patching 388 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 389 be disabled also. 390 391 If you have a toolchain which supports mprofile-kernel, then you can 392 enable this. Otherwise leave it disabled. If you're not sure, say 393 "N". 394 395config MPROFILE_KERNEL 396 depends on PPC64 && CPU_LITTLE_ENDIAN 397 def_bool !DISABLE_MPROFILE_KERNEL 398 399config IOMMU_HELPER 400 def_bool PPC64 401 402config SWIOTLB 403 bool "SWIOTLB support" 404 default n 405 select IOMMU_HELPER 406 ---help--- 407 Support for IO bounce buffering for systems without an IOMMU. 408 This allows us to DMA to the full physical address space on 409 platforms where the size of a physical address is larger 410 than the bus address. Not all platforms support this. 411 412config HOTPLUG_CPU 413 bool "Support for enabling/disabling CPUs" 414 depends on SMP && (PPC_PSERIES || \ 415 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 416 ---help--- 417 Say Y here to be able to disable and re-enable individual 418 CPUs at runtime on SMP machines. 419 420 Say N if you are unsure. 421 422config ARCH_CPU_PROBE_RELEASE 423 def_bool y 424 depends on HOTPLUG_CPU 425 426config ARCH_ENABLE_MEMORY_HOTPLUG 427 def_bool y 428 429config ARCH_HAS_WALK_MEMORY 430 def_bool y 431 432config ARCH_ENABLE_MEMORY_HOTREMOVE 433 def_bool y 434 435config PPC64_SUPPORTS_MEMORY_FAILURE 436 bool "Add support for memory hwpoison" 437 depends on PPC_BOOK3S_64 438 default "y" if PPC_POWERNV 439 select ARCH_SUPPORTS_MEMORY_FAILURE 440 441config KEXEC 442 bool "kexec system call" 443 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 444 select KEXEC_CORE 445 help 446 kexec is a system call that implements the ability to shutdown your 447 current kernel, and to start another kernel. It is like a reboot 448 but it is independent of the system firmware. And like a reboot 449 you can start any kernel with it, not just Linux. 450 451 The name comes from the similarity to the exec system call. 452 453 It is an ongoing process to be certain the hardware in a machine 454 is properly shutdown, so do not be surprised if this code does not 455 initially work for you. As of this writing the exact hardware 456 interface is strongly in flux, so no good recommendation can be 457 made. 458 459config RELOCATABLE 460 bool "Build a relocatable kernel" 461 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE)) 462 select NONSTATIC_KERNEL 463 help 464 This builds a kernel image that is capable of running at the 465 location the kernel is loaded at. For ppc32, there is no any 466 alignment restrictions, and this feature is a superset of 467 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 468 16k-aligned base address. The kernel is linked as a 469 position-independent executable (PIE) and contains dynamic relocations 470 which are processed early in the bootup process. 471 472 One use is for the kexec on panic case where the recovery kernel 473 must live at a different physical address than the primary 474 kernel. 475 476 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 477 it has been loaded at and the compile time physical addresses 478 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 479 setting can still be useful to bootwrappers that need to know the 480 load address of the kernel (eg. u-boot/mkimage). 481 482config RELOCATABLE_TEST 483 bool "Test relocatable kernel" 484 depends on (PPC64 && RELOCATABLE) 485 default n 486 help 487 This runs the relocatable kernel at the address it was initially 488 loaded at, which tends to be non-zero and therefore test the 489 relocation code. 490 491config CRASH_DUMP 492 bool "Build a kdump crash kernel" 493 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 494 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 495 help 496 Build a kernel suitable for use as a kdump capture kernel. 497 The same kernel binary can be used as production kernel and dump 498 capture kernel. 499 500config FA_DUMP 501 bool "Firmware-assisted dump" 502 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 503 help 504 A robust mechanism to get reliable kernel crash dump with 505 assistance from firmware. This approach does not use kexec, 506 instead firmware assists in booting the kdump kernel 507 while preserving memory contents. Firmware-assisted dump 508 is meant to be a kdump replacement offering robustness and 509 speed not possible without system firmware assistance. 510 511 If unsure, say "N" 512 513config IRQ_ALL_CPUS 514 bool "Distribute interrupts on all CPUs by default" 515 depends on SMP 516 help 517 This option gives the kernel permission to distribute IRQs across 518 multiple CPUs. Saying N here will route all IRQs to the first 519 CPU. Generally saying Y is safe, although some problems have been 520 reported with SMP Power Macintoshes with this option enabled. 521 522config NUMA 523 bool "NUMA support" 524 depends on PPC64 525 default y if SMP && PPC_PSERIES 526 527config NODES_SHIFT 528 int 529 default "8" if PPC64 530 default "4" 531 depends on NEED_MULTIPLE_NODES 532 533config USE_PERCPU_NUMA_NODE_ID 534 def_bool y 535 depends on NUMA 536 537config HAVE_MEMORYLESS_NODES 538 def_bool y 539 depends on NUMA 540 541config ARCH_SELECT_MEMORY_MODEL 542 def_bool y 543 depends on PPC64 544 545config ARCH_FLATMEM_ENABLE 546 def_bool y 547 depends on (PPC64 && !NUMA) || PPC32 548 549config ARCH_SPARSEMEM_ENABLE 550 def_bool y 551 depends on PPC64 552 select SPARSEMEM_VMEMMAP_ENABLE 553 554config ARCH_SPARSEMEM_DEFAULT 555 def_bool y 556 depends on (SMP && PPC_PSERIES) || PPC_PS3 557 558config SYS_SUPPORTS_HUGETLBFS 559 bool 560 561source "mm/Kconfig" 562 563config ARCH_MEMORY_PROBE 564 def_bool y 565 depends on MEMORY_HOTPLUG 566 567# Some NUMA nodes have memory ranges that span 568# other nodes. Even though a pfn is valid and 569# between a node's start and end pfns, it may not 570# reside on that node. See memmap_init_zone() 571# for details. 572config NODES_SPAN_OTHER_NODES 573 def_bool y 574 depends on NEED_MULTIPLE_NODES 575 576config STDBINUTILS 577 bool "Using standard binutils settings" 578 depends on 44x 579 default y 580 help 581 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 582 Note, that kernel will be able to run only those applications, 583 which had been compiled using binutils later than 2.17.50.0.3 with 584 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 585 the older binutils, you can patch them with a trivial patch, which 586 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 587 588choice 589 prompt "Page size" 590 default PPC_4K_PAGES 591 help 592 Select the kernel logical page size. Increasing the page size 593 will reduce software overhead at each page boundary, allow 594 hardware prefetch mechanisms to be more effective, and allow 595 larger dma transfers increasing IO efficiency and reducing 596 overhead. However the utilization of memory will increase. 597 For example, each cached file will using a multiple of the 598 page size to hold its contents and the difference between the 599 end of file and the end of page is wasted. 600 601 Some dedicated systems, such as software raid serving with 602 accelerated calculations, have shown significant increases. 603 604 If you configure a 64 bit kernel for 64k pages but the 605 processor does not support them, then the kernel will simulate 606 them with 4k pages, loading them on demand, but with the 607 reduced software overhead and larger internal fragmentation. 608 For the 32 bit kernel, a large page option will not be offered 609 unless it is supported by the configured processor. 610 611 If unsure, choose 4K_PAGES. 612 613config PPC_4K_PAGES 614 bool "4k page size" 615 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 616 617config PPC_16K_PAGES 618 bool "16k page size" 619 depends on 44x || PPC_8xx 620 621config PPC_64K_PAGES 622 bool "64k page size" 623 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 624 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 625 626config PPC_256K_PAGES 627 bool "256k page size" 628 depends on 44x && !STDBINUTILS 629 help 630 Make the page size 256k. 631 632 As the ELF standard only requires alignment to support page 633 sizes up to 64k, you will need to compile all of your user 634 space applications with a non-standard binutils settings 635 (see the STDBINUTILS description for details). 636 637 Say N unless you know what you are doing. 638 639endchoice 640 641config FORCE_MAX_ZONEORDER 642 int "Maximum zone order" 643 range 8 9 if PPC64 && PPC_64K_PAGES 644 default "9" if PPC64 && PPC_64K_PAGES 645 range 13 13 if PPC64 && !PPC_64K_PAGES 646 default "13" if PPC64 && !PPC_64K_PAGES 647 range 9 64 if PPC32 && PPC_16K_PAGES 648 default "9" if PPC32 && PPC_16K_PAGES 649 range 7 64 if PPC32 && PPC_64K_PAGES 650 default "7" if PPC32 && PPC_64K_PAGES 651 range 5 64 if PPC32 && PPC_256K_PAGES 652 default "5" if PPC32 && PPC_256K_PAGES 653 range 11 64 654 default "11" 655 help 656 The kernel memory allocator divides physically contiguous memory 657 blocks into "zones", where each zone is a power of two number of 658 pages. This option selects the largest power of two that the kernel 659 keeps in the memory allocator. If you need to allocate very large 660 blocks of physically contiguous memory, then you may need to 661 increase this value. 662 663 This config option is actually maximum order plus one. For example, 664 a value of 11 means that the largest free memory block is 2^10 pages. 665 666 The page size is not necessarily 4KB. For example, on 64-bit 667 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 668 this in mind when choosing a value for this option. 669 670config PPC_SUBPAGE_PROT 671 bool "Support setting protections for 4k subpages" 672 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 673 help 674 This option adds support for a system call to allow user programs 675 to set access permissions (read/write, readonly, or no access) 676 on the 4k subpages of each 64k page. 677 678config PPC_COPRO_BASE 679 bool 680 default n 681 682config SCHED_SMT 683 bool "SMT (Hyperthreading) scheduler support" 684 depends on PPC64 && SMP 685 help 686 SMT scheduler support improves the CPU scheduler's decision making 687 when dealing with POWER5 cpus at a cost of slightly increased 688 overhead in some places. If unsure say N here. 689 690config PPC_DENORMALISATION 691 bool "PowerPC denormalisation exception handling" 692 depends on PPC_BOOK3S_64 693 default "y" if PPC_POWERNV 694 ---help--- 695 Add support for handling denormalisation of single precision 696 values. Useful for bare metal only. If unsure say Y here. 697 698config CMDLINE_BOOL 699 bool "Default bootloader kernel arguments" 700 701config CMDLINE 702 string "Initial kernel command string" 703 depends on CMDLINE_BOOL 704 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 705 help 706 On some platforms, there is currently no way for the boot loader to 707 pass arguments to the kernel. For these platforms, you can supply 708 some command-line options at build time by entering them here. In 709 most cases you will need to specify the root device here. 710 711config CMDLINE_FORCE 712 bool "Always use the default kernel command string" 713 depends on CMDLINE_BOOL 714 help 715 Always use the default kernel command string, even if the boot 716 loader passes other arguments to the kernel. 717 This is useful if you cannot or don't want to change the 718 command-line options your boot loader passes to the kernel. 719 720config EXTRA_TARGETS 721 string "Additional default image types" 722 help 723 List additional targets to be built by the bootwrapper here (separated 724 by spaces). This is useful for targets that depend of device tree 725 files in the .dts directory. 726 727 Targets in this list will be build as part of the default build 728 target, or when the user does a 'make zImage' or a 729 'make zImage.initrd'. 730 731 If unsure, leave blank 732 733config ARCH_WANTS_FREEZER_CONTROL 734 def_bool y 735 depends on ADB_PMU 736 737source kernel/power/Kconfig 738 739config SECCOMP 740 bool "Enable seccomp to safely compute untrusted bytecode" 741 depends on PROC_FS 742 default y 743 help 744 This kernel feature is useful for number crunching applications 745 that may need to compute untrusted bytecode during their 746 execution. By using pipes or other transports made available to 747 the process as file descriptors supporting the read/write 748 syscalls, it's possible to isolate those applications in 749 their own address space using seccomp. Once seccomp is 750 enabled via /proc/<pid>/seccomp, it cannot be disabled 751 and the task is only allowed to execute a few safe syscalls 752 defined by each seccomp mode. 753 754 If unsure, say Y. Only embedded should say N here. 755 756endmenu 757 758config ISA_DMA_API 759 bool 760 default PCI 761 762menu "Bus options" 763 764config ISA 765 bool "Support for ISA-bus hardware" 766 depends on PPC_CHRP 767 select PPC_I8259 768 help 769 Find out whether you have ISA slots on your motherboard. ISA is the 770 name of a bus system, i.e. the way the CPU talks to the other stuff 771 inside your box. If you have an Apple machine, say N here; if you 772 have an IBM RS/6000 or pSeries machine, say Y. If you have an 773 embedded board, consult your board documentation. 774 775config ZONE_DMA 776 bool 777 default y 778 779config NEED_DMA_MAP_STATE 780 def_bool (PPC64 || NOT_COHERENT_CACHE) 781 782config NEED_SG_DMA_LENGTH 783 def_bool y 784 785config GENERIC_ISA_DMA 786 bool 787 depends on ISA_DMA_API 788 default y 789 790config PPC_INDIRECT_PCI 791 bool 792 depends on PCI 793 default y if 40x || 44x 794 default n 795 796config EISA 797 bool 798 799config SBUS 800 bool 801 802config FSL_SOC 803 bool 804 805config FSL_PCI 806 bool 807 select PPC_INDIRECT_PCI 808 select PCI_QUIRKS 809 810config FSL_PMC 811 bool 812 default y 813 depends on SUSPEND && (PPC_85xx || PPC_86xx) 814 help 815 Freescale MPC85xx/MPC86xx power management controller support 816 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 817 818config PPC4xx_CPM 819 bool 820 default y 821 depends on SUSPEND && (44x || 40x) 822 help 823 PPC4xx Clock Power Management (CPM) support (suspend/resume). 824 It also enables support for two different idle states (idle-wait 825 and idle-doze). 826 827config 4xx_SOC 828 bool 829 830config FSL_LBC 831 bool "Freescale Local Bus support" 832 help 833 Enables reporting of errors from the Freescale local bus 834 controller. Also contains some common code used by 835 drivers for specific local bus peripherals. 836 837config FSL_GTM 838 bool 839 depends on PPC_83xx || QUICC_ENGINE || CPM2 840 help 841 Freescale General-purpose Timers support 842 843# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 844config MCA 845 bool 846 847# Platforms that what PCI turned unconditionally just do select PCI 848# in their config node. Platforms that want to choose at config 849# time should select PPC_PCI_CHOICE 850config PPC_PCI_CHOICE 851 bool 852 853config PCI 854 bool "PCI support" if PPC_PCI_CHOICE 855 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 856 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 857 default PCI_QSPAN if !4xx && !CPM2 && 8xx 858 select GENERIC_PCI_IOMAP 859 help 860 Find out whether your system includes a PCI bus. PCI is the name of 861 a bus system, i.e. the way the CPU talks to the other stuff inside 862 your box. If you say Y here, the kernel will include drivers and 863 infrastructure code to support PCI bus devices. 864 865config PCI_DOMAINS 866 def_bool PCI 867 868config PCI_SYSCALL 869 def_bool PCI 870 871config PCI_QSPAN 872 bool "QSpan PCI" 873 depends on !4xx && !CPM2 && 8xx 874 select PPC_I8259 875 help 876 Say Y here if you have a system based on a Motorola 8xx-series 877 embedded processor with a QSPAN PCI interface, otherwise say N. 878 879config PCI_8260 880 bool 881 depends on PCI && 8260 882 select PPC_INDIRECT_PCI 883 default y 884 885source "drivers/pci/Kconfig" 886 887source "drivers/pcmcia/Kconfig" 888 889config HAS_RAPIDIO 890 bool 891 default n 892 893config RAPIDIO 894 tristate "RapidIO support" 895 depends on HAS_RAPIDIO || PCI 896 help 897 If you say Y here, the kernel will include drivers and 898 infrastructure code to support RapidIO interconnect devices. 899 900config FSL_RIO 901 bool "Freescale Embedded SRIO Controller support" 902 depends on RAPIDIO = y && HAS_RAPIDIO 903 default "n" 904 ---help--- 905 Include support for RapidIO controller on Freescale embedded 906 processors (MPC8548, MPC8641, etc). 907 908source "drivers/rapidio/Kconfig" 909 910endmenu 911 912config NONSTATIC_KERNEL 913 bool 914 default n 915 916menu "Advanced setup" 917 depends on PPC32 918 919config ADVANCED_OPTIONS 920 bool "Prompt for advanced kernel configuration options" 921 help 922 This option will enable prompting for a variety of advanced kernel 923 configuration options. These options can cause the kernel to not 924 work if they are set incorrectly, but can be used to optimize certain 925 aspects of kernel memory management. 926 927 Unless you know what you are doing, say N here. 928 929comment "Default settings for advanced configuration options are used" 930 depends on !ADVANCED_OPTIONS 931 932config LOWMEM_SIZE_BOOL 933 bool "Set maximum low memory" 934 depends on ADVANCED_OPTIONS 935 help 936 This option allows you to set the maximum amount of memory which 937 will be used as "low memory", that is, memory which the kernel can 938 access directly, without having to set up a kernel virtual mapping. 939 This can be useful in optimizing the layout of kernel virtual 940 memory. 941 942 Say N here unless you know what you are doing. 943 944config LOWMEM_SIZE 945 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 946 default "0x30000000" 947 948config LOWMEM_CAM_NUM_BOOL 949 bool "Set number of CAMs to use to map low memory" 950 depends on ADVANCED_OPTIONS && FSL_BOOKE 951 help 952 This option allows you to set the maximum number of CAM slots that 953 will be used to map low memory. There are a limited number of slots 954 available and even more limited number that will fit in the L1 MMU. 955 However, using more entries will allow mapping more low memory. This 956 can be useful in optimizing the layout of kernel virtual memory. 957 958 Say N here unless you know what you are doing. 959 960config LOWMEM_CAM_NUM 961 depends on FSL_BOOKE 962 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 963 default 3 964 965config DYNAMIC_MEMSTART 966 bool "Enable page aligned dynamic load address for kernel" 967 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 968 select NONSTATIC_KERNEL 969 help 970 This option enables the kernel to be loaded at any page aligned 971 physical address. The kernel creates a mapping from KERNELBASE to 972 the address where the kernel is loaded. The page size here implies 973 the TLB page size of the mapping for kernel on the particular platform. 974 Please refer to the init code for finding the TLB page size. 975 976 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 977 kernel image, where the only restriction is the page aligned kernel 978 load address. When this option is enabled, the compile time physical 979 address CONFIG_PHYSICAL_START is ignored. 980 981 This option is overridden by CONFIG_RELOCATABLE 982 983config PAGE_OFFSET_BOOL 984 bool "Set custom page offset address" 985 depends on ADVANCED_OPTIONS 986 help 987 This option allows you to set the kernel virtual address at which 988 the kernel will map low memory. This can be useful in optimizing 989 the virtual memory layout of the system. 990 991 Say N here unless you know what you are doing. 992 993config PAGE_OFFSET 994 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 995 default "0xc0000000" 996 997config KERNEL_START_BOOL 998 bool "Set custom kernel base address" 999 depends on ADVANCED_OPTIONS 1000 help 1001 This option allows you to set the kernel virtual address at which 1002 the kernel will be loaded. Normally this should match PAGE_OFFSET 1003 however there are times (like kdump) that one might not want them 1004 to be the same. 1005 1006 Say N here unless you know what you are doing. 1007 1008config KERNEL_START 1009 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1010 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1011 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1012 default "0xc0000000" 1013 1014config PHYSICAL_START_BOOL 1015 bool "Set physical address where the kernel is loaded" 1016 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1017 help 1018 This gives the physical address where the kernel is loaded. 1019 1020 Say N here unless you know what you are doing. 1021 1022config PHYSICAL_START 1023 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1024 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1025 default "0x00000000" 1026 1027config PHYSICAL_ALIGN 1028 hex 1029 default "0x04000000" if FSL_BOOKE 1030 help 1031 This value puts the alignment restrictions on physical address 1032 where kernel is loaded and run from. Kernel is compiled for an 1033 address which meets above alignment restriction. 1034 1035config TASK_SIZE_BOOL 1036 bool "Set custom user task size" 1037 depends on ADVANCED_OPTIONS 1038 help 1039 This option allows you to set the amount of virtual address space 1040 allocated to user tasks. This can be useful in optimizing the 1041 virtual memory layout of the system. 1042 1043 Say N here unless you know what you are doing. 1044 1045config TASK_SIZE 1046 hex "Size of user task space" if TASK_SIZE_BOOL 1047 default "0x80000000" if PPC_8xx 1048 default "0xc0000000" 1049 1050config CONSISTENT_SIZE_BOOL 1051 bool "Set custom consistent memory pool size" 1052 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1053 help 1054 This option allows you to set the size of the 1055 consistent memory pool. This pool of virtual memory 1056 is used to make consistent memory allocations. 1057 1058config CONSISTENT_SIZE 1059 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1060 default "0x00200000" if NOT_COHERENT_CACHE 1061 1062config PIN_TLB 1063 bool "Pinned Kernel TLBs (860 ONLY)" 1064 depends on ADVANCED_OPTIONS && 8xx 1065 1066config PIN_TLB_IMMR 1067 bool "Pinned TLB for IMMR" 1068 depends on PIN_TLB 1069 default y 1070endmenu 1071 1072if PPC64 1073# This value must have zeroes in the bottom 60 bits otherwise lots will break 1074config PAGE_OFFSET 1075 hex 1076 default "0xc000000000000000" 1077config KERNEL_START 1078 hex 1079 default "0xc000000000000000" 1080config PHYSICAL_START 1081 hex 1082 default "0x00000000" 1083endif 1084 1085config ARCH_RANDOM 1086 def_bool n 1087 1088source "net/Kconfig" 1089 1090source "drivers/Kconfig" 1091 1092source "fs/Kconfig" 1093 1094source "lib/Kconfig" 1095 1096source "arch/powerpc/Kconfig.debug" 1097 1098source "security/Kconfig" 1099 1100config KEYS_COMPAT 1101 bool 1102 depends on COMPAT && KEYS 1103 default y 1104 1105source "crypto/Kconfig" 1106 1107config PPC_LIB_RHEAP 1108 bool 1109 1110source "arch/powerpc/kvm/Kconfig" 1111 1112source "kernel/livepatch/Kconfig" 1113