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_CPU_VULNERABILITIES if PPC_BOOK3S_64 132 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 disable this. Otherwise leave it enabled. If you're not sure, say 393 "Y". 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 CRASH_DUMP 483 bool "Build a kdump crash kernel" 484 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 485 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE 486 help 487 Build a kernel suitable for use as a kdump capture kernel. 488 The same kernel binary can be used as production kernel and dump 489 capture kernel. 490 491config FA_DUMP 492 bool "Firmware-assisted dump" 493 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC 494 help 495 A robust mechanism to get reliable kernel crash dump with 496 assistance from firmware. This approach does not use kexec, 497 instead firmware assists in booting the kdump kernel 498 while preserving memory contents. Firmware-assisted dump 499 is meant to be a kdump replacement offering robustness and 500 speed not possible without system firmware assistance. 501 502 If unsure, say "N" 503 504config IRQ_ALL_CPUS 505 bool "Distribute interrupts on all CPUs by default" 506 depends on SMP 507 help 508 This option gives the kernel permission to distribute IRQs across 509 multiple CPUs. Saying N here will route all IRQs to the first 510 CPU. Generally saying Y is safe, although some problems have been 511 reported with SMP Power Macintoshes with this option enabled. 512 513config NUMA 514 bool "NUMA support" 515 depends on PPC64 516 default y if SMP && PPC_PSERIES 517 518config NODES_SHIFT 519 int 520 default "8" if PPC64 521 default "4" 522 depends on NEED_MULTIPLE_NODES 523 524config USE_PERCPU_NUMA_NODE_ID 525 def_bool y 526 depends on NUMA 527 528config HAVE_MEMORYLESS_NODES 529 def_bool y 530 depends on NUMA 531 532config ARCH_SELECT_MEMORY_MODEL 533 def_bool y 534 depends on PPC64 535 536config ARCH_FLATMEM_ENABLE 537 def_bool y 538 depends on (PPC64 && !NUMA) || PPC32 539 540config ARCH_SPARSEMEM_ENABLE 541 def_bool y 542 depends on PPC64 543 select SPARSEMEM_VMEMMAP_ENABLE 544 545config ARCH_SPARSEMEM_DEFAULT 546 def_bool y 547 depends on (SMP && PPC_PSERIES) || PPC_PS3 548 549config SYS_SUPPORTS_HUGETLBFS 550 bool 551 552source "mm/Kconfig" 553 554config ARCH_MEMORY_PROBE 555 def_bool y 556 depends on MEMORY_HOTPLUG 557 558# Some NUMA nodes have memory ranges that span 559# other nodes. Even though a pfn is valid and 560# between a node's start and end pfns, it may not 561# reside on that node. See memmap_init_zone() 562# for details. 563config NODES_SPAN_OTHER_NODES 564 def_bool y 565 depends on NEED_MULTIPLE_NODES 566 567config STDBINUTILS 568 bool "Using standard binutils settings" 569 depends on 44x 570 default y 571 help 572 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 573 Note, that kernel will be able to run only those applications, 574 which had been compiled using binutils later than 2.17.50.0.3 with 575 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 576 the older binutils, you can patch them with a trivial patch, which 577 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 578 579choice 580 prompt "Page size" 581 default PPC_4K_PAGES 582 help 583 Select the kernel logical page size. Increasing the page size 584 will reduce software overhead at each page boundary, allow 585 hardware prefetch mechanisms to be more effective, and allow 586 larger dma transfers increasing IO efficiency and reducing 587 overhead. However the utilization of memory will increase. 588 For example, each cached file will using a multiple of the 589 page size to hold its contents and the difference between the 590 end of file and the end of page is wasted. 591 592 Some dedicated systems, such as software raid serving with 593 accelerated calculations, have shown significant increases. 594 595 If you configure a 64 bit kernel for 64k pages but the 596 processor does not support them, then the kernel will simulate 597 them with 4k pages, loading them on demand, but with the 598 reduced software overhead and larger internal fragmentation. 599 For the 32 bit kernel, a large page option will not be offered 600 unless it is supported by the configured processor. 601 602 If unsure, choose 4K_PAGES. 603 604config PPC_4K_PAGES 605 bool "4k page size" 606 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 607 608config PPC_16K_PAGES 609 bool "16k page size" 610 depends on 44x || PPC_8xx 611 612config PPC_64K_PAGES 613 bool "64k page size" 614 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) 615 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 616 617config PPC_256K_PAGES 618 bool "256k page size" 619 depends on 44x && !STDBINUTILS 620 help 621 Make the page size 256k. 622 623 As the ELF standard only requires alignment to support page 624 sizes up to 64k, you will need to compile all of your user 625 space applications with a non-standard binutils settings 626 (see the STDBINUTILS description for details). 627 628 Say N unless you know what you are doing. 629 630endchoice 631 632config FORCE_MAX_ZONEORDER 633 int "Maximum zone order" 634 range 8 9 if PPC64 && PPC_64K_PAGES 635 default "9" if PPC64 && PPC_64K_PAGES 636 range 13 13 if PPC64 && !PPC_64K_PAGES 637 default "13" if PPC64 && !PPC_64K_PAGES 638 range 9 64 if PPC32 && PPC_16K_PAGES 639 default "9" if PPC32 && PPC_16K_PAGES 640 range 7 64 if PPC32 && PPC_64K_PAGES 641 default "7" if PPC32 && PPC_64K_PAGES 642 range 5 64 if PPC32 && PPC_256K_PAGES 643 default "5" if PPC32 && PPC_256K_PAGES 644 range 11 64 645 default "11" 646 help 647 The kernel memory allocator divides physically contiguous memory 648 blocks into "zones", where each zone is a power of two number of 649 pages. This option selects the largest power of two that the kernel 650 keeps in the memory allocator. If you need to allocate very large 651 blocks of physically contiguous memory, then you may need to 652 increase this value. 653 654 This config option is actually maximum order plus one. For example, 655 a value of 11 means that the largest free memory block is 2^10 pages. 656 657 The page size is not necessarily 4KB. For example, on 64-bit 658 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 659 this in mind when choosing a value for this option. 660 661config PPC_SUBPAGE_PROT 662 bool "Support setting protections for 4k subpages" 663 depends on PPC_STD_MMU_64 && PPC_64K_PAGES 664 help 665 This option adds support for a system call to allow user programs 666 to set access permissions (read/write, readonly, or no access) 667 on the 4k subpages of each 64k page. 668 669config PPC_COPRO_BASE 670 bool 671 default n 672 673config SCHED_SMT 674 bool "SMT (Hyperthreading) scheduler support" 675 depends on PPC64 && SMP 676 help 677 SMT scheduler support improves the CPU scheduler's decision making 678 when dealing with POWER5 cpus at a cost of slightly increased 679 overhead in some places. If unsure say N here. 680 681config PPC_DENORMALISATION 682 bool "PowerPC denormalisation exception handling" 683 depends on PPC_BOOK3S_64 684 default "y" if PPC_POWERNV 685 ---help--- 686 Add support for handling denormalisation of single precision 687 values. Useful for bare metal only. If unsure say Y here. 688 689config CMDLINE_BOOL 690 bool "Default bootloader kernel arguments" 691 692config CMDLINE 693 string "Initial kernel command string" 694 depends on CMDLINE_BOOL 695 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 696 help 697 On some platforms, there is currently no way for the boot loader to 698 pass arguments to the kernel. For these platforms, you can supply 699 some command-line options at build time by entering them here. In 700 most cases you will need to specify the root device here. 701 702config CMDLINE_FORCE 703 bool "Always use the default kernel command string" 704 depends on CMDLINE_BOOL 705 help 706 Always use the default kernel command string, even if the boot 707 loader passes other arguments to the kernel. 708 This is useful if you cannot or don't want to change the 709 command-line options your boot loader passes to the kernel. 710 711config EXTRA_TARGETS 712 string "Additional default image types" 713 help 714 List additional targets to be built by the bootwrapper here (separated 715 by spaces). This is useful for targets that depend of device tree 716 files in the .dts directory. 717 718 Targets in this list will be build as part of the default build 719 target, or when the user does a 'make zImage' or a 720 'make zImage.initrd'. 721 722 If unsure, leave blank 723 724config ARCH_WANTS_FREEZER_CONTROL 725 def_bool y 726 depends on ADB_PMU 727 728source kernel/power/Kconfig 729 730config SECCOMP 731 bool "Enable seccomp to safely compute untrusted bytecode" 732 depends on PROC_FS 733 default y 734 help 735 This kernel feature is useful for number crunching applications 736 that may need to compute untrusted bytecode during their 737 execution. By using pipes or other transports made available to 738 the process as file descriptors supporting the read/write 739 syscalls, it's possible to isolate those applications in 740 their own address space using seccomp. Once seccomp is 741 enabled via /proc/<pid>/seccomp, it cannot be disabled 742 and the task is only allowed to execute a few safe syscalls 743 defined by each seccomp mode. 744 745 If unsure, say Y. Only embedded should say N here. 746 747endmenu 748 749config ISA_DMA_API 750 bool 751 default PCI 752 753menu "Bus options" 754 755config ISA 756 bool "Support for ISA-bus hardware" 757 depends on PPC_CHRP 758 select PPC_I8259 759 help 760 Find out whether you have ISA slots on your motherboard. ISA is the 761 name of a bus system, i.e. the way the CPU talks to the other stuff 762 inside your box. If you have an Apple machine, say N here; if you 763 have an IBM RS/6000 or pSeries machine, say Y. If you have an 764 embedded board, consult your board documentation. 765 766config ZONE_DMA 767 bool 768 default y 769 770config NEED_DMA_MAP_STATE 771 def_bool (PPC64 || NOT_COHERENT_CACHE) 772 773config NEED_SG_DMA_LENGTH 774 def_bool y 775 776config GENERIC_ISA_DMA 777 bool 778 depends on ISA_DMA_API 779 default y 780 781config PPC_INDIRECT_PCI 782 bool 783 depends on PCI 784 default y if 40x || 44x 785 default n 786 787config EISA 788 bool 789 790config SBUS 791 bool 792 793config FSL_SOC 794 bool 795 796config FSL_PCI 797 bool 798 select PPC_INDIRECT_PCI 799 select PCI_QUIRKS 800 801config FSL_PMC 802 bool 803 default y 804 depends on SUSPEND && (PPC_85xx || PPC_86xx) 805 help 806 Freescale MPC85xx/MPC86xx power management controller support 807 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 808 809config PPC4xx_CPM 810 bool 811 default y 812 depends on SUSPEND && (44x || 40x) 813 help 814 PPC4xx Clock Power Management (CPM) support (suspend/resume). 815 It also enables support for two different idle states (idle-wait 816 and idle-doze). 817 818config 4xx_SOC 819 bool 820 821config FSL_LBC 822 bool "Freescale Local Bus support" 823 help 824 Enables reporting of errors from the Freescale local bus 825 controller. Also contains some common code used by 826 drivers for specific local bus peripherals. 827 828config FSL_GTM 829 bool 830 depends on PPC_83xx || QUICC_ENGINE || CPM2 831 help 832 Freescale General-purpose Timers support 833 834# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 835config MCA 836 bool 837 838# Platforms that what PCI turned unconditionally just do select PCI 839# in their config node. Platforms that want to choose at config 840# time should select PPC_PCI_CHOICE 841config PPC_PCI_CHOICE 842 bool 843 844config PCI 845 bool "PCI support" if PPC_PCI_CHOICE 846 default y if !40x && !CPM2 && !8xx && !PPC_83xx \ 847 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 848 default PCI_QSPAN if !4xx && !CPM2 && 8xx 849 select GENERIC_PCI_IOMAP 850 help 851 Find out whether your system includes a PCI bus. PCI is the name of 852 a bus system, i.e. the way the CPU talks to the other stuff inside 853 your box. If you say Y here, the kernel will include drivers and 854 infrastructure code to support PCI bus devices. 855 856config PCI_DOMAINS 857 def_bool PCI 858 859config PCI_SYSCALL 860 def_bool PCI 861 862config PCI_QSPAN 863 bool "QSpan PCI" 864 depends on !4xx && !CPM2 && 8xx 865 select PPC_I8259 866 help 867 Say Y here if you have a system based on a Motorola 8xx-series 868 embedded processor with a QSPAN PCI interface, otherwise say N. 869 870config PCI_8260 871 bool 872 depends on PCI && 8260 873 select PPC_INDIRECT_PCI 874 default y 875 876source "drivers/pci/Kconfig" 877 878source "drivers/pcmcia/Kconfig" 879 880config HAS_RAPIDIO 881 bool 882 default n 883 884config RAPIDIO 885 tristate "RapidIO support" 886 depends on HAS_RAPIDIO || PCI 887 help 888 If you say Y here, the kernel will include drivers and 889 infrastructure code to support RapidIO interconnect devices. 890 891config FSL_RIO 892 bool "Freescale Embedded SRIO Controller support" 893 depends on RAPIDIO = y && HAS_RAPIDIO 894 default "n" 895 ---help--- 896 Include support for RapidIO controller on Freescale embedded 897 processors (MPC8548, MPC8641, etc). 898 899source "drivers/rapidio/Kconfig" 900 901endmenu 902 903config NONSTATIC_KERNEL 904 bool 905 default n 906 907menu "Advanced setup" 908 depends on PPC32 909 910config ADVANCED_OPTIONS 911 bool "Prompt for advanced kernel configuration options" 912 help 913 This option will enable prompting for a variety of advanced kernel 914 configuration options. These options can cause the kernel to not 915 work if they are set incorrectly, but can be used to optimize certain 916 aspects of kernel memory management. 917 918 Unless you know what you are doing, say N here. 919 920comment "Default settings for advanced configuration options are used" 921 depends on !ADVANCED_OPTIONS 922 923config LOWMEM_SIZE_BOOL 924 bool "Set maximum low memory" 925 depends on ADVANCED_OPTIONS 926 help 927 This option allows you to set the maximum amount of memory which 928 will be used as "low memory", that is, memory which the kernel can 929 access directly, without having to set up a kernel virtual mapping. 930 This can be useful in optimizing the layout of kernel virtual 931 memory. 932 933 Say N here unless you know what you are doing. 934 935config LOWMEM_SIZE 936 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 937 default "0x30000000" 938 939config LOWMEM_CAM_NUM_BOOL 940 bool "Set number of CAMs to use to map low memory" 941 depends on ADVANCED_OPTIONS && FSL_BOOKE 942 help 943 This option allows you to set the maximum number of CAM slots that 944 will be used to map low memory. There are a limited number of slots 945 available and even more limited number that will fit in the L1 MMU. 946 However, using more entries will allow mapping more low memory. This 947 can be useful in optimizing the layout of kernel virtual memory. 948 949 Say N here unless you know what you are doing. 950 951config LOWMEM_CAM_NUM 952 depends on FSL_BOOKE 953 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 954 default 3 955 956config DYNAMIC_MEMSTART 957 bool "Enable page aligned dynamic load address for kernel" 958 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 959 select NONSTATIC_KERNEL 960 help 961 This option enables the kernel to be loaded at any page aligned 962 physical address. The kernel creates a mapping from KERNELBASE to 963 the address where the kernel is loaded. The page size here implies 964 the TLB page size of the mapping for kernel on the particular platform. 965 Please refer to the init code for finding the TLB page size. 966 967 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 968 kernel image, where the only restriction is the page aligned kernel 969 load address. When this option is enabled, the compile time physical 970 address CONFIG_PHYSICAL_START is ignored. 971 972 This option is overridden by CONFIG_RELOCATABLE 973 974config PAGE_OFFSET_BOOL 975 bool "Set custom page offset address" 976 depends on ADVANCED_OPTIONS 977 help 978 This option allows you to set the kernel virtual address at which 979 the kernel will map low memory. This can be useful in optimizing 980 the virtual memory layout of the system. 981 982 Say N here unless you know what you are doing. 983 984config PAGE_OFFSET 985 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 986 default "0xc0000000" 987 988config KERNEL_START_BOOL 989 bool "Set custom kernel base address" 990 depends on ADVANCED_OPTIONS 991 help 992 This option allows you to set the kernel virtual address at which 993 the kernel will be loaded. Normally this should match PAGE_OFFSET 994 however there are times (like kdump) that one might not want them 995 to be the same. 996 997 Say N here unless you know what you are doing. 998 999config KERNEL_START 1000 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1001 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1002 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1003 default "0xc0000000" 1004 1005config PHYSICAL_START_BOOL 1006 bool "Set physical address where the kernel is loaded" 1007 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1008 help 1009 This gives the physical address where the kernel is loaded. 1010 1011 Say N here unless you know what you are doing. 1012 1013config PHYSICAL_START 1014 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1015 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1016 default "0x00000000" 1017 1018config PHYSICAL_ALIGN 1019 hex 1020 default "0x04000000" if FSL_BOOKE 1021 help 1022 This value puts the alignment restrictions on physical address 1023 where kernel is loaded and run from. Kernel is compiled for an 1024 address which meets above alignment restriction. 1025 1026config TASK_SIZE_BOOL 1027 bool "Set custom user task size" 1028 depends on ADVANCED_OPTIONS 1029 help 1030 This option allows you to set the amount of virtual address space 1031 allocated to user tasks. This can be useful in optimizing the 1032 virtual memory layout of the system. 1033 1034 Say N here unless you know what you are doing. 1035 1036config TASK_SIZE 1037 hex "Size of user task space" if TASK_SIZE_BOOL 1038 default "0x80000000" if PPC_8xx 1039 default "0xc0000000" 1040 1041config CONSISTENT_SIZE_BOOL 1042 bool "Set custom consistent memory pool size" 1043 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1044 help 1045 This option allows you to set the size of the 1046 consistent memory pool. This pool of virtual memory 1047 is used to make consistent memory allocations. 1048 1049config CONSISTENT_SIZE 1050 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1051 default "0x00200000" if NOT_COHERENT_CACHE 1052 1053config PIN_TLB 1054 bool "Pinned Kernel TLBs (860 ONLY)" 1055 depends on ADVANCED_OPTIONS && 8xx 1056 1057config PIN_TLB_IMMR 1058 bool "Pinned TLB for IMMR" 1059 depends on PIN_TLB 1060 default y 1061endmenu 1062 1063if PPC64 1064# This value must have zeroes in the bottom 60 bits otherwise lots will break 1065config PAGE_OFFSET 1066 hex 1067 default "0xc000000000000000" 1068config KERNEL_START 1069 hex 1070 default "0xc000000000000000" 1071config PHYSICAL_START 1072 hex 1073 default "0x00000000" 1074endif 1075 1076config ARCH_RANDOM 1077 def_bool n 1078 1079source "net/Kconfig" 1080 1081source "drivers/Kconfig" 1082 1083source "fs/Kconfig" 1084 1085source "lib/Kconfig" 1086 1087source "arch/powerpc/Kconfig.debug" 1088 1089source "security/Kconfig" 1090 1091source "crypto/Kconfig" 1092 1093config PPC_LIB_RHEAP 1094 bool 1095 1096source "arch/powerpc/kvm/Kconfig" 1097 1098source "kernel/livepatch/Kconfig" 1099