1# SPDX-License-Identifier: GPL-2.0 2source "arch/powerpc/platforms/Kconfig.cputype" 3 4config PPC32 5 bool 6 default y if !PPC64 7 8config 32BIT 9 bool 10 default y if PPC32 11 12config 64BIT 13 bool 14 default y if PPC64 15 16config ARCH_PHYS_ADDR_T_64BIT 17 def_bool PPC64 || PHYS_64BIT 18 19config ARCH_DMA_ADDR_T_64BIT 20 def_bool ARCH_PHYS_ADDR_T_64BIT 21 22config MMU 23 bool 24 default y 25 26config ARCH_MMAP_RND_BITS_MAX 27 # On Book3S 64, the default virtual address space for 64-bit processes 28 # is 2^47 (128TB). As a maximum, allow randomisation to consume up to 29 # 32T of address space (2^45), which should ensure a reasonable gap 30 # between bottom-up and top-down allocations for applications that 31 # consume "normal" amounts of address space. Book3S 64 only supports 64K 32 # and 4K page sizes. 33 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) 34 default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) 35 # 36 # On all other 64-bit platforms (currently only Book3E), the virtual 37 # address space is 2^46 (64TB). Allow randomisation to consume up to 16T 38 # of address space (2^44). Only 4K page sizes are supported. 39 default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) 40 # 41 # For 32-bit, use the compat values, as they're the same. 42 default ARCH_MMAP_RND_COMPAT_BITS_MAX 43 44config ARCH_MMAP_RND_BITS_MIN 45 # Allow randomisation to consume up to 1GB of address space (2^30). 46 default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) 47 default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) 48 # 49 # For 32-bit, use the compat values, as they're the same. 50 default ARCH_MMAP_RND_COMPAT_BITS_MIN 51 52config ARCH_MMAP_RND_COMPAT_BITS_MAX 53 # Total virtual address space for 32-bit processes is 2^31 (2GB). 54 # Allow randomisation to consume up to 512MB of address space (2^29). 55 default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) 56 default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) 57 default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) 58 default 17 # 17 = 29 (512MB) - 12 (4K) 59 60config ARCH_MMAP_RND_COMPAT_BITS_MIN 61 # Total virtual address space for 32-bit processes is 2^31 (2GB). 62 # Allow randomisation to consume up to 8MB of address space (2^23). 63 default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) 64 default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) 65 default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) 66 default 11 # 11 = 23 (8MB) - 12 (4K) 67 68config HAVE_SETUP_PER_CPU_AREA 69 def_bool PPC64 70 71config NEED_PER_CPU_EMBED_FIRST_CHUNK 72 def_bool PPC64 73 74config NR_IRQS 75 int "Number of virtual interrupt numbers" 76 range 32 32768 77 default "512" 78 help 79 This defines the number of virtual interrupt numbers the kernel 80 can manage. Virtual interrupt numbers are what you see in 81 /proc/interrupts. If you configure your system to have too few, 82 drivers will fail to load or worse - handle with care. 83 84config NMI_IPI 85 bool 86 depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) 87 default y 88 89config PPC_WATCHDOG 90 bool 91 depends on HARDLOCKUP_DETECTOR 92 depends on HAVE_HARDLOCKUP_DETECTOR_ARCH 93 default y 94 help 95 This is a placeholder when the powerpc hardlockup detector 96 watchdog is selected (arch/powerpc/kernel/watchdog.c). It is 97 seleted via the generic lockup detector menu which is why we 98 have no standalone config option for it here. 99 100config STACKTRACE_SUPPORT 101 bool 102 default y 103 104config TRACE_IRQFLAGS_SUPPORT 105 bool 106 default y 107 108config LOCKDEP_SUPPORT 109 bool 110 default y 111 112config RWSEM_GENERIC_SPINLOCK 113 bool 114 115config RWSEM_XCHGADD_ALGORITHM 116 bool 117 default y 118 119config GENERIC_LOCKBREAK 120 bool 121 default y 122 depends on SMP && PREEMPT 123 124config GENERIC_HWEIGHT 125 bool 126 default y 127 128config ARCH_HAS_DMA_SET_COHERENT_MASK 129 bool 130 131config PPC 132 bool 133 default y 134 # 135 # Please keep this list sorted alphabetically. 136 # 137 select ARCH_HAS_DEVMEM_IS_ALLOWED 138 select ARCH_HAS_DMA_SET_COHERENT_MASK 139 select ARCH_HAS_ELF_RANDOMIZE 140 select ARCH_HAS_FORTIFY_SOURCE 141 select ARCH_HAS_GCOV_PROFILE_ALL 142 select ARCH_HAS_PHYS_TO_DMA 143 select ARCH_HAS_PMEM_API if PPC64 144 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE 145 select ARCH_HAS_SG_CHAIN 146 select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) 147 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 148 select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64 149 select ARCH_HAS_UBSAN_SANITIZE_ALL 150 select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64 151 select ARCH_HAVE_NMI_SAFE_CMPXCHG 152 select ARCH_MIGHT_HAVE_PC_PARPORT 153 select ARCH_MIGHT_HAVE_PC_SERIO 154 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX 155 select ARCH_SUPPORTS_ATOMIC_RMW 156 select ARCH_USE_BUILTIN_BSWAP 157 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 158 select ARCH_WANT_IPC_PARSE_VERSION 159 select ARCH_WEAK_RELEASE_ACQUIRE 160 select BINFMT_ELF 161 select BUILDTIME_EXTABLE_SORT 162 select CLONE_BACKWARDS 163 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 164 select EDAC_ATOMIC_SCRUB 165 select EDAC_SUPPORT 166 select GENERIC_ATOMIC64 if PPC32 167 select GENERIC_CLOCKEVENTS 168 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 169 select GENERIC_CMOS_UPDATE 170 select GENERIC_CPU_AUTOPROBE 171 select GENERIC_CPU_VULNERABILITIES if PPC_BOOK3S_64 172 select GENERIC_IRQ_SHOW 173 select GENERIC_IRQ_SHOW_LEVEL 174 select GENERIC_SMP_IDLE_THREAD 175 select GENERIC_STRNCPY_FROM_USER 176 select GENERIC_STRNLEN_USER 177 select GENERIC_TIME_VSYSCALL 178 select HAVE_ARCH_AUDITSYSCALL 179 select HAVE_ARCH_JUMP_LABEL 180 select HAVE_ARCH_KGDB 181 select HAVE_ARCH_MMAP_RND_BITS 182 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT 183 select HAVE_ARCH_SECCOMP_FILTER 184 select HAVE_ARCH_TRACEHOOK 185 select HAVE_CBPF_JIT if !PPC64 186 select HAVE_CONTEXT_TRACKING if PPC64 187 select HAVE_DEBUG_KMEMLEAK 188 select HAVE_DEBUG_STACKOVERFLOW 189 select HAVE_DMA_API_DEBUG 190 select HAVE_DYNAMIC_FTRACE 191 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 192 select HAVE_EBPF_JIT if PPC64 193 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 194 select HAVE_FTRACE_MCOUNT_RECORD 195 select HAVE_FUNCTION_GRAPH_TRACER 196 select HAVE_FUNCTION_TRACER 197 select HAVE_GCC_PLUGINS 198 select HAVE_GENERIC_GUP 199 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 200 select HAVE_IDE 201 select HAVE_IOREMAP_PROT 202 select HAVE_IRQ_EXIT_ON_IRQ_STACK 203 select HAVE_KERNEL_GZIP 204 select HAVE_KPROBES 205 select HAVE_KPROBES_ON_FTRACE 206 select HAVE_KRETPROBES 207 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 208 select HAVE_MEMBLOCK 209 select HAVE_MEMBLOCK_NODE_MAP 210 select HAVE_MOD_ARCH_SPECIFIC 211 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) 212 select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) 213 select HAVE_OPROFILE 214 select HAVE_OPTPROBES if PPC64 215 select HAVE_PERF_EVENTS 216 select HAVE_PERF_EVENTS_NMI if PPC64 217 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH 218 select HAVE_PERF_REGS 219 select HAVE_PERF_USER_STACK_DUMP 220 select HAVE_RCU_TABLE_FREE if SMP 221 select HAVE_REGS_AND_STACK_ACCESS_API 222 select HAVE_SYSCALL_TRACEPOINTS 223 select HAVE_VIRT_CPU_ACCOUNTING 224 select HAVE_IRQ_TIME_ACCOUNTING 225 select IRQ_DOMAIN 226 select IRQ_FORCED_THREADING 227 select MODULES_USE_ELF_RELA 228 select NO_BOOTMEM 229 select OF 230 select OF_EARLY_FLATTREE 231 select OF_RESERVED_MEM 232 select OLD_SIGACTION if PPC32 233 select OLD_SIGSUSPEND 234 select SPARSE_IRQ 235 select SYSCTL_EXCEPTION_TRACE 236 select VIRT_TO_BUS if !PPC64 237 # 238 # Please keep this list sorted alphabetically. 239 # 240 241config GENERIC_CSUM 242 def_bool n 243 244config EARLY_PRINTK 245 bool 246 default y 247 248config PANIC_TIMEOUT 249 int 250 default 180 251 252config COMPAT 253 bool 254 default y if PPC64 255 select COMPAT_BINFMT_ELF 256 select ARCH_WANT_OLD_COMPAT_IPC 257 select COMPAT_OLD_SIGACTION 258 259config SYSVIPC_COMPAT 260 bool 261 depends on COMPAT && SYSVIPC 262 default y 263 264# All PPC32s use generic nvram driver through ppc_md 265config GENERIC_NVRAM 266 bool 267 default y if PPC32 268 269config SCHED_OMIT_FRAME_POINTER 270 bool 271 default y 272 273config ARCH_MAY_HAVE_PC_FDC 274 bool 275 default PCI 276 277config PPC_UDBG_16550 278 bool 279 default n 280 281config GENERIC_TBSYNC 282 bool 283 default y if PPC32 && SMP 284 default n 285 286config AUDIT_ARCH 287 bool 288 default y 289 290config GENERIC_BUG 291 bool 292 default y 293 depends on BUG 294 295config SYS_SUPPORTS_APM_EMULATION 296 default y if PMAC_APM_EMU 297 bool 298 299config EPAPR_BOOT 300 bool 301 help 302 Used to allow a board to specify it wants an ePAPR compliant wrapper. 303 default n 304 305config DEFAULT_UIMAGE 306 bool 307 help 308 Used to allow a board to specify it wants a uImage built by default 309 default n 310 311config ARCH_HIBERNATION_POSSIBLE 312 bool 313 default y 314 315config ARCH_SUSPEND_POSSIBLE 316 def_bool y 317 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 318 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 319 || 44x || 40x 320 321config PPC_DCR_NATIVE 322 bool 323 default n 324 325config PPC_DCR_MMIO 326 bool 327 default n 328 329config PPC_DCR 330 bool 331 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 332 default y 333 334config PPC_OF_PLATFORM_PCI 335 bool 336 depends on PCI 337 depends on PPC64 # not supported on 32 bits yet 338 default n 339 340config ARCH_SUPPORTS_DEBUG_PAGEALLOC 341 depends on PPC32 || PPC_BOOK3S_64 342 def_bool y 343 344config ARCH_SUPPORTS_UPROBES 345 def_bool y 346 347config PPC_ADV_DEBUG_REGS 348 bool 349 depends on 40x || BOOKE 350 default y 351 352config PPC_ADV_DEBUG_IACS 353 int 354 depends on PPC_ADV_DEBUG_REGS 355 default 4 if 44x 356 default 2 357 358config PPC_ADV_DEBUG_DACS 359 int 360 depends on PPC_ADV_DEBUG_REGS 361 default 2 362 363config PPC_ADV_DEBUG_DVCS 364 int 365 depends on PPC_ADV_DEBUG_REGS 366 default 2 if 44x 367 default 0 368 369config PPC_ADV_DEBUG_DAC_RANGE 370 bool 371 depends on PPC_ADV_DEBUG_REGS && 44x 372 default y 373 374config ZONE_DMA32 375 bool 376 default y if PPC64 377 378config PGTABLE_LEVELS 379 int 380 default 2 if !PPC64 381 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 382 default 4 383 384source "init/Kconfig" 385 386source "kernel/Kconfig.freezer" 387 388source "arch/powerpc/sysdev/Kconfig" 389source "arch/powerpc/platforms/Kconfig" 390 391menu "Kernel options" 392 393config HIGHMEM 394 bool "High memory support" 395 depends on PPC32 396 397source kernel/Kconfig.hz 398source kernel/Kconfig.preempt 399source "fs/Kconfig.binfmt" 400 401config HUGETLB_PAGE_SIZE_VARIABLE 402 bool 403 depends on HUGETLB_PAGE 404 default y 405 406config MATH_EMULATION 407 bool "Math emulation" 408 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE 409 ---help--- 410 Some PowerPC chips designed for embedded applications do not have 411 a floating-point unit and therefore do not implement the 412 floating-point instructions in the PowerPC instruction set. If you 413 say Y here, the kernel will include code to emulate a floating-point 414 unit, which will allow programs that use floating-point 415 instructions to run. 416 417 This is also useful to emulate missing (optional) instructions 418 such as fsqrt on cores that do have an FPU but do not implement 419 them (such as Freescale BookE). 420 421choice 422 prompt "Math emulation options" 423 default MATH_EMULATION_FULL 424 depends on MATH_EMULATION 425 426config MATH_EMULATION_FULL 427 bool "Emulate all the floating point instructions" 428 ---help--- 429 Select this option will enable the kernel to support to emulate 430 all the floating point instructions. If your SoC doesn't have 431 a FPU, you should select this. 432 433config MATH_EMULATION_HW_UNIMPLEMENTED 434 bool "Just emulate the FPU unimplemented instructions" 435 ---help--- 436 Select this if you know there does have a hardware FPU on your 437 SoC, but some floating point instructions are not implemented by that. 438 439endchoice 440 441config PPC_TRANSACTIONAL_MEM 442 bool "Transactional Memory support for POWERPC" 443 depends on PPC_BOOK3S_64 444 depends on SMP 445 select ALTIVEC 446 select VSX 447 default n 448 ---help--- 449 Support user-mode Transactional Memory on POWERPC. 450 451config LD_HEAD_STUB_CATCH 452 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT 453 depends on PPC64 454 default n 455 help 456 Very large kernels can cause linker branch stubs to be generated by 457 code in head_64.S, which moves the head text sections out of their 458 specified location. This option can work around the problem. 459 460 If unsure, say "N". 461 462config DISABLE_MPROFILE_KERNEL 463 bool "Disable use of mprofile-kernel for kernel tracing" 464 depends on PPC64 && CPU_LITTLE_ENDIAN 465 default y 466 help 467 Selecting this options disables use of the mprofile-kernel ABI for 468 kernel tracing. That will cause options such as live patching 469 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to 470 be disabled also. 471 472 If you have a toolchain which supports mprofile-kernel, then you can 473 disable this. Otherwise leave it enabled. If you're not sure, say 474 "Y". 475 476config MPROFILE_KERNEL 477 depends on PPC64 && CPU_LITTLE_ENDIAN 478 def_bool !DISABLE_MPROFILE_KERNEL 479 480config IOMMU_HELPER 481 def_bool PPC64 482 483config SWIOTLB 484 bool "SWIOTLB support" 485 default n 486 select IOMMU_HELPER 487 ---help--- 488 Support for IO bounce buffering for systems without an IOMMU. 489 This allows us to DMA to the full physical address space on 490 platforms where the size of a physical address is larger 491 than the bus address. Not all platforms support this. 492 493config HOTPLUG_CPU 494 bool "Support for enabling/disabling CPUs" 495 depends on SMP && (PPC_PSERIES || \ 496 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 497 ---help--- 498 Say Y here to be able to disable and re-enable individual 499 CPUs at runtime on SMP machines. 500 501 Say N if you are unsure. 502 503config ARCH_CPU_PROBE_RELEASE 504 def_bool y 505 depends on HOTPLUG_CPU 506 507config ARCH_ENABLE_MEMORY_HOTPLUG 508 def_bool y 509 510config ARCH_HAS_WALK_MEMORY 511 def_bool y 512 513config ARCH_ENABLE_MEMORY_HOTREMOVE 514 def_bool y 515 516config PPC64_SUPPORTS_MEMORY_FAILURE 517 bool "Add support for memory hwpoison" 518 depends on PPC_BOOK3S_64 519 default "y" if PPC_POWERNV 520 select ARCH_SUPPORTS_MEMORY_FAILURE 521 522config KEXEC 523 bool "kexec system call" 524 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 525 select KEXEC_CORE 526 help 527 kexec is a system call that implements the ability to shutdown your 528 current kernel, and to start another kernel. It is like a reboot 529 but it is independent of the system firmware. And like a reboot 530 you can start any kernel with it, not just Linux. 531 532 The name comes from the similarity to the exec system call. 533 534 It is an ongoing process to be certain the hardware in a machine 535 is properly shutdown, so do not be surprised if this code does not 536 initially work for you. As of this writing the exact hardware 537 interface is strongly in flux, so no good recommendation can be 538 made. 539 540config KEXEC_FILE 541 bool "kexec file based system call" 542 select KEXEC_CORE 543 select HAVE_IMA_KEXEC 544 select BUILD_BIN2C 545 depends on PPC64 546 depends on CRYPTO=y 547 depends on CRYPTO_SHA256=y 548 help 549 This is a new version of the kexec system call. This call is 550 file based and takes in file descriptors as system call arguments 551 for kernel and initramfs as opposed to a list of segments as is the 552 case for the older kexec call. 553 554config RELOCATABLE 555 bool "Build a relocatable kernel" 556 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) 557 select NONSTATIC_KERNEL 558 select MODULE_REL_CRCS if MODVERSIONS 559 help 560 This builds a kernel image that is capable of running at the 561 location the kernel is loaded at. For ppc32, there is no any 562 alignment restrictions, and this feature is a superset of 563 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 564 16k-aligned base address. The kernel is linked as a 565 position-independent executable (PIE) and contains dynamic relocations 566 which are processed early in the bootup process. 567 568 One use is for the kexec on panic case where the recovery kernel 569 must live at a different physical address than the primary 570 kernel. 571 572 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 573 it has been loaded at and the compile time physical addresses 574 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 575 setting can still be useful to bootwrappers that need to know the 576 load address of the kernel (eg. u-boot/mkimage). 577 578config RELOCATABLE_TEST 579 bool "Test relocatable kernel" 580 depends on (PPC64 && RELOCATABLE) 581 default n 582 help 583 This runs the relocatable kernel at the address it was initially 584 loaded at, which tends to be non-zero and therefore test the 585 relocation code. 586 587config CRASH_DUMP 588 bool "Build a dump capture kernel" 589 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 590 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE 591 help 592 Build a kernel suitable for use as a dump capture kernel. 593 The same kernel binary can be used as production kernel and dump 594 capture kernel. 595 596config FA_DUMP 597 bool "Firmware-assisted dump" 598 depends on PPC64 && PPC_RTAS 599 select CRASH_CORE 600 select CRASH_DUMP 601 help 602 A robust mechanism to get reliable kernel crash dump with 603 assistance from firmware. This approach does not use kexec, 604 instead firmware assists in booting the capture kernel 605 while preserving memory contents. Firmware-assisted dump 606 is meant to be a kdump replacement offering robustness and 607 speed not possible without system firmware assistance. 608 609 If unsure, say "N" 610 611config IRQ_ALL_CPUS 612 bool "Distribute interrupts on all CPUs by default" 613 depends on SMP 614 help 615 This option gives the kernel permission to distribute IRQs across 616 multiple CPUs. Saying N here will route all IRQs to the first 617 CPU. Generally saying Y is safe, although some problems have been 618 reported with SMP Power Macintoshes with this option enabled. 619 620config NUMA 621 bool "NUMA support" 622 depends on PPC64 623 default y if SMP && PPC_PSERIES 624 625config NODES_SHIFT 626 int 627 default "8" if PPC64 628 default "4" 629 depends on NEED_MULTIPLE_NODES 630 631config USE_PERCPU_NUMA_NODE_ID 632 def_bool y 633 depends on NUMA 634 635config HAVE_MEMORYLESS_NODES 636 def_bool y 637 depends on NUMA 638 639config ARCH_SELECT_MEMORY_MODEL 640 def_bool y 641 depends on PPC64 642 643config ARCH_FLATMEM_ENABLE 644 def_bool y 645 depends on (PPC64 && !NUMA) || PPC32 646 647config ARCH_SPARSEMEM_ENABLE 648 def_bool y 649 depends on PPC64 650 select SPARSEMEM_VMEMMAP_ENABLE 651 652config ARCH_SPARSEMEM_DEFAULT 653 def_bool y 654 depends on PPC_BOOK3S_64 655 656config SYS_SUPPORTS_HUGETLBFS 657 bool 658 659config ILLEGAL_POINTER_VALUE 660 hex 661 # This is roughly half way between the top of user space and the bottom 662 # of kernel space, which seems about as good as we can get. 663 default 0x5deadbeef0000000 if PPC64 664 default 0 665 666source "mm/Kconfig" 667 668config ARCH_MEMORY_PROBE 669 def_bool y 670 depends on MEMORY_HOTPLUG 671 672# Some NUMA nodes have memory ranges that span 673# other nodes. Even though a pfn is valid and 674# between a node's start and end pfns, it may not 675# reside on that node. See memmap_init_zone() 676# for details. 677config NODES_SPAN_OTHER_NODES 678 def_bool y 679 depends on NEED_MULTIPLE_NODES 680 681config STDBINUTILS 682 bool "Using standard binutils settings" 683 depends on 44x 684 default y 685 help 686 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 687 Note, that kernel will be able to run only those applications, 688 which had been compiled using binutils later than 2.17.50.0.3 with 689 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 690 the older binutils, you can patch them with a trivial patch, which 691 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 692 693choice 694 prompt "Page size" 695 default PPC_4K_PAGES 696 help 697 Select the kernel logical page size. Increasing the page size 698 will reduce software overhead at each page boundary, allow 699 hardware prefetch mechanisms to be more effective, and allow 700 larger dma transfers increasing IO efficiency and reducing 701 overhead. However the utilization of memory will increase. 702 For example, each cached file will using a multiple of the 703 page size to hold its contents and the difference between the 704 end of file and the end of page is wasted. 705 706 Some dedicated systems, such as software raid serving with 707 accelerated calculations, have shown significant increases. 708 709 If you configure a 64 bit kernel for 64k pages but the 710 processor does not support them, then the kernel will simulate 711 them with 4k pages, loading them on demand, but with the 712 reduced software overhead and larger internal fragmentation. 713 For the 32 bit kernel, a large page option will not be offered 714 unless it is supported by the configured processor. 715 716 If unsure, choose 4K_PAGES. 717 718config PPC_4K_PAGES 719 bool "4k page size" 720 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 721 722config PPC_16K_PAGES 723 bool "16k page size" 724 depends on 44x || PPC_8xx 725 726config PPC_64K_PAGES 727 bool "64k page size" 728 depends on !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_64) 729 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 730 731config PPC_256K_PAGES 732 bool "256k page size" 733 depends on 44x && !STDBINUTILS 734 help 735 Make the page size 256k. 736 737 As the ELF standard only requires alignment to support page 738 sizes up to 64k, you will need to compile all of your user 739 space applications with a non-standard binutils settings 740 (see the STDBINUTILS description for details). 741 742 Say N unless you know what you are doing. 743 744endchoice 745 746config THREAD_SHIFT 747 int "Thread shift" if EXPERT 748 range 13 15 749 default "15" if PPC_256K_PAGES 750 default "14" if PPC64 751 default "13" 752 help 753 Used to define the stack size. The default is almost always what you 754 want. Only change this if you know what you are doing. 755 756config FORCE_MAX_ZONEORDER 757 int "Maximum zone order" 758 range 8 9 if PPC64 && PPC_64K_PAGES 759 default "9" if PPC64 && PPC_64K_PAGES 760 range 13 13 if PPC64 && !PPC_64K_PAGES 761 default "13" if PPC64 && !PPC_64K_PAGES 762 range 9 64 if PPC32 && PPC_16K_PAGES 763 default "9" if PPC32 && PPC_16K_PAGES 764 range 7 64 if PPC32 && PPC_64K_PAGES 765 default "7" if PPC32 && PPC_64K_PAGES 766 range 5 64 if PPC32 && PPC_256K_PAGES 767 default "5" if PPC32 && PPC_256K_PAGES 768 range 11 64 769 default "11" 770 help 771 The kernel memory allocator divides physically contiguous memory 772 blocks into "zones", where each zone is a power of two number of 773 pages. This option selects the largest power of two that the kernel 774 keeps in the memory allocator. If you need to allocate very large 775 blocks of physically contiguous memory, then you may need to 776 increase this value. 777 778 This config option is actually maximum order plus one. For example, 779 a value of 11 means that the largest free memory block is 2^10 pages. 780 781 The page size is not necessarily 4KB. For example, on 64-bit 782 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 783 this in mind when choosing a value for this option. 784 785config PPC_SUBPAGE_PROT 786 bool "Support setting protections for 4k subpages" 787 depends on PPC_BOOK3S_64 && PPC_64K_PAGES 788 help 789 This option adds support for a system call to allow user programs 790 to set access permissions (read/write, readonly, or no access) 791 on the 4k subpages of each 64k page. 792 793config PPC_COPRO_BASE 794 bool 795 default n 796 797config SCHED_SMT 798 bool "SMT (Hyperthreading) scheduler support" 799 depends on PPC64 && SMP 800 help 801 SMT scheduler support improves the CPU scheduler's decision making 802 when dealing with POWER5 cpus at a cost of slightly increased 803 overhead in some places. If unsure say N here. 804 805config PPC_DENORMALISATION 806 bool "PowerPC denormalisation exception handling" 807 depends on PPC_BOOK3S_64 808 default "y" if PPC_POWERNV 809 ---help--- 810 Add support for handling denormalisation of single precision 811 values. Useful for bare metal only. If unsure say Y here. 812 813config CMDLINE_BOOL 814 bool "Default bootloader kernel arguments" 815 816config CMDLINE 817 string "Initial kernel command string" 818 depends on CMDLINE_BOOL 819 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 820 help 821 On some platforms, there is currently no way for the boot loader to 822 pass arguments to the kernel. For these platforms, you can supply 823 some command-line options at build time by entering them here. In 824 most cases you will need to specify the root device here. 825 826config CMDLINE_FORCE 827 bool "Always use the default kernel command string" 828 depends on CMDLINE_BOOL 829 help 830 Always use the default kernel command string, even if the boot 831 loader passes other arguments to the kernel. 832 This is useful if you cannot or don't want to change the 833 command-line options your boot loader passes to the kernel. 834 835config EXTRA_TARGETS 836 string "Additional default image types" 837 help 838 List additional targets to be built by the bootwrapper here (separated 839 by spaces). This is useful for targets that depend of device tree 840 files in the .dts directory. 841 842 Targets in this list will be build as part of the default build 843 target, or when the user does a 'make zImage' or a 844 'make zImage.initrd'. 845 846 If unsure, leave blank 847 848config ARCH_WANTS_FREEZER_CONTROL 849 def_bool y 850 depends on ADB_PMU 851 852source kernel/power/Kconfig 853 854config SECCOMP 855 bool "Enable seccomp to safely compute untrusted bytecode" 856 depends on PROC_FS 857 default y 858 help 859 This kernel feature is useful for number crunching applications 860 that may need to compute untrusted bytecode during their 861 execution. By using pipes or other transports made available to 862 the process as file descriptors supporting the read/write 863 syscalls, it's possible to isolate those applications in 864 their own address space using seccomp. Once seccomp is 865 enabled via /proc/<pid>/seccomp, it cannot be disabled 866 and the task is only allowed to execute a few safe syscalls 867 defined by each seccomp mode. 868 869 If unsure, say Y. Only embedded should say N here. 870 871config PPC_MEM_KEYS 872 prompt "PowerPC Memory Protection Keys" 873 def_bool y 874 depends on PPC_BOOK3S_64 875 select ARCH_USES_HIGH_VMA_FLAGS 876 select ARCH_HAS_PKEYS 877 help 878 Memory Protection Keys provides a mechanism for enforcing 879 page-based protections, but without requiring modification of the 880 page tables when an application changes protection domains. 881 882 For details, see Documentation/vm/protection-keys.txt 883 884 If unsure, say y. 885 886endmenu 887 888config ISA_DMA_API 889 bool 890 default PCI 891 892menu "Bus options" 893 894config ISA 895 bool "Support for ISA-bus hardware" 896 depends on PPC_CHRP 897 select PPC_I8259 898 help 899 Find out whether you have ISA slots on your motherboard. ISA is the 900 name of a bus system, i.e. the way the CPU talks to the other stuff 901 inside your box. If you have an Apple machine, say N here; if you 902 have an IBM RS/6000 or pSeries machine, say Y. If you have an 903 embedded board, consult your board documentation. 904 905config ZONE_DMA 906 bool 907 default y 908 909config NEED_DMA_MAP_STATE 910 def_bool (PPC64 || NOT_COHERENT_CACHE) 911 912config NEED_SG_DMA_LENGTH 913 def_bool y 914 915config GENERIC_ISA_DMA 916 bool 917 depends on ISA_DMA_API 918 default y 919 920config PPC_INDIRECT_PCI 921 bool 922 depends on PCI 923 default y if 40x || 44x 924 default n 925 926config EISA 927 bool 928 929config SBUS 930 bool 931 932config FSL_SOC 933 bool 934 935config FSL_PCI 936 bool 937 select PPC_INDIRECT_PCI 938 select PCI_QUIRKS 939 940config FSL_PMC 941 bool 942 default y 943 depends on SUSPEND && (PPC_85xx || PPC_86xx) 944 help 945 Freescale MPC85xx/MPC86xx power management controller support 946 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 947 948config PPC4xx_CPM 949 bool 950 default y 951 depends on SUSPEND && (44x || 40x) 952 help 953 PPC4xx Clock Power Management (CPM) support (suspend/resume). 954 It also enables support for two different idle states (idle-wait 955 and idle-doze). 956 957config 4xx_SOC 958 bool 959 960config FSL_LBC 961 bool "Freescale Local Bus support" 962 help 963 Enables reporting of errors from the Freescale local bus 964 controller. Also contains some common code used by 965 drivers for specific local bus peripherals. 966 967config FSL_GTM 968 bool 969 depends on PPC_83xx || QUICC_ENGINE || CPM2 970 help 971 Freescale General-purpose Timers support 972 973# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 974config MCA 975 bool 976 977# Platforms that what PCI turned unconditionally just do select PCI 978# in their config node. Platforms that want to choose at config 979# time should select PPC_PCI_CHOICE 980config PPC_PCI_CHOICE 981 bool 982 983config PCI 984 bool "PCI support" if PPC_PCI_CHOICE 985 default y if !40x && !CPM2 && !PPC_8xx && !PPC_83xx \ 986 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 987 default PCI_QSPAN if PPC_8xx 988 select GENERIC_PCI_IOMAP 989 help 990 Find out whether your system includes a PCI bus. PCI is the name of 991 a bus system, i.e. the way the CPU talks to the other stuff inside 992 your box. If you say Y here, the kernel will include drivers and 993 infrastructure code to support PCI bus devices. 994 995config PCI_DOMAINS 996 def_bool PCI 997 998config PCI_SYSCALL 999 def_bool PCI 1000 1001config PCI_QSPAN 1002 bool "QSpan PCI" 1003 depends on PPC_8xx 1004 select PPC_I8259 1005 help 1006 Say Y here if you have a system based on a Motorola 8xx-series 1007 embedded processor with a QSPAN PCI interface, otherwise say N. 1008 1009config PCI_8260 1010 bool 1011 depends on PCI && 8260 1012 select PPC_INDIRECT_PCI 1013 default y 1014 1015source "drivers/pci/Kconfig" 1016 1017source "drivers/pcmcia/Kconfig" 1018 1019config HAS_RAPIDIO 1020 bool 1021 default n 1022 1023config RAPIDIO 1024 tristate "RapidIO support" 1025 depends on HAS_RAPIDIO || PCI 1026 help 1027 If you say Y here, the kernel will include drivers and 1028 infrastructure code to support RapidIO interconnect devices. 1029 1030config FSL_RIO 1031 bool "Freescale Embedded SRIO Controller support" 1032 depends on RAPIDIO = y && HAS_RAPIDIO 1033 default "n" 1034 ---help--- 1035 Include support for RapidIO controller on Freescale embedded 1036 processors (MPC8548, MPC8641, etc). 1037 1038source "drivers/rapidio/Kconfig" 1039 1040endmenu 1041 1042config NONSTATIC_KERNEL 1043 bool 1044 default n 1045 1046menu "Advanced setup" 1047 depends on PPC32 1048 1049config ADVANCED_OPTIONS 1050 bool "Prompt for advanced kernel configuration options" 1051 help 1052 This option will enable prompting for a variety of advanced kernel 1053 configuration options. These options can cause the kernel to not 1054 work if they are set incorrectly, but can be used to optimize certain 1055 aspects of kernel memory management. 1056 1057 Unless you know what you are doing, say N here. 1058 1059comment "Default settings for advanced configuration options are used" 1060 depends on !ADVANCED_OPTIONS 1061 1062config LOWMEM_SIZE_BOOL 1063 bool "Set maximum low memory" 1064 depends on ADVANCED_OPTIONS 1065 help 1066 This option allows you to set the maximum amount of memory which 1067 will be used as "low memory", that is, memory which the kernel can 1068 access directly, without having to set up a kernel virtual mapping. 1069 This can be useful in optimizing the layout of kernel virtual 1070 memory. 1071 1072 Say N here unless you know what you are doing. 1073 1074config LOWMEM_SIZE 1075 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1076 default "0x30000000" 1077 1078config LOWMEM_CAM_NUM_BOOL 1079 bool "Set number of CAMs to use to map low memory" 1080 depends on ADVANCED_OPTIONS && FSL_BOOKE 1081 help 1082 This option allows you to set the maximum number of CAM slots that 1083 will be used to map low memory. There are a limited number of slots 1084 available and even more limited number that will fit in the L1 MMU. 1085 However, using more entries will allow mapping more low memory. This 1086 can be useful in optimizing the layout of kernel virtual memory. 1087 1088 Say N here unless you know what you are doing. 1089 1090config LOWMEM_CAM_NUM 1091 depends on FSL_BOOKE 1092 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1093 default 3 1094 1095config DYNAMIC_MEMSTART 1096 bool "Enable page aligned dynamic load address for kernel" 1097 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 1098 select NONSTATIC_KERNEL 1099 help 1100 This option enables the kernel to be loaded at any page aligned 1101 physical address. The kernel creates a mapping from KERNELBASE to 1102 the address where the kernel is loaded. The page size here implies 1103 the TLB page size of the mapping for kernel on the particular platform. 1104 Please refer to the init code for finding the TLB page size. 1105 1106 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1107 kernel image, where the only restriction is the page aligned kernel 1108 load address. When this option is enabled, the compile time physical 1109 address CONFIG_PHYSICAL_START is ignored. 1110 1111 This option is overridden by CONFIG_RELOCATABLE 1112 1113config PAGE_OFFSET_BOOL 1114 bool "Set custom page offset address" 1115 depends on ADVANCED_OPTIONS 1116 help 1117 This option allows you to set the kernel virtual address at which 1118 the kernel will map low memory. This can be useful in optimizing 1119 the virtual memory layout of the system. 1120 1121 Say N here unless you know what you are doing. 1122 1123config PAGE_OFFSET 1124 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1125 default "0xc0000000" 1126 1127config KERNEL_START_BOOL 1128 bool "Set custom kernel base address" 1129 depends on ADVANCED_OPTIONS 1130 help 1131 This option allows you to set the kernel virtual address at which 1132 the kernel will be loaded. Normally this should match PAGE_OFFSET 1133 however there are times (like kdump) that one might not want them 1134 to be the same. 1135 1136 Say N here unless you know what you are doing. 1137 1138config KERNEL_START 1139 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1140 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1141 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1142 default "0xc0000000" 1143 1144config PHYSICAL_START_BOOL 1145 bool "Set physical address where the kernel is loaded" 1146 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1147 help 1148 This gives the physical address where the kernel is loaded. 1149 1150 Say N here unless you know what you are doing. 1151 1152config PHYSICAL_START 1153 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1154 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1155 default "0x00000000" 1156 1157config PHYSICAL_ALIGN 1158 hex 1159 default "0x04000000" if FSL_BOOKE 1160 help 1161 This value puts the alignment restrictions on physical address 1162 where kernel is loaded and run from. Kernel is compiled for an 1163 address which meets above alignment restriction. 1164 1165config TASK_SIZE_BOOL 1166 bool "Set custom user task size" 1167 depends on ADVANCED_OPTIONS 1168 help 1169 This option allows you to set the amount of virtual address space 1170 allocated to user tasks. This can be useful in optimizing the 1171 virtual memory layout of the system. 1172 1173 Say N here unless you know what you are doing. 1174 1175config TASK_SIZE 1176 hex "Size of user task space" if TASK_SIZE_BOOL 1177 default "0x80000000" if PPC_8xx 1178 default "0xc0000000" 1179 1180config CONSISTENT_SIZE_BOOL 1181 bool "Set custom consistent memory pool size" 1182 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1183 help 1184 This option allows you to set the size of the 1185 consistent memory pool. This pool of virtual memory 1186 is used to make consistent memory allocations. 1187 1188config CONSISTENT_SIZE 1189 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1190 default "0x00200000" if NOT_COHERENT_CACHE 1191 1192config PIN_TLB 1193 bool "Pinned Kernel TLBs (860 ONLY)" 1194 depends on ADVANCED_OPTIONS && PPC_8xx && \ 1195 !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX 1196 1197config PIN_TLB_DATA 1198 bool "Pinned TLB for DATA" 1199 depends on PIN_TLB 1200 default y 1201 1202config PIN_TLB_IMMR 1203 bool "Pinned TLB for IMMR" 1204 depends on PIN_TLB 1205 default y 1206 1207config PIN_TLB_TEXT 1208 bool "Pinned TLB for TEXT" 1209 depends on PIN_TLB 1210 default y 1211endmenu 1212 1213if PPC64 1214# This value must have zeroes in the bottom 60 bits otherwise lots will break 1215config PAGE_OFFSET 1216 hex 1217 default "0xc000000000000000" 1218config KERNEL_START 1219 hex 1220 default "0xc000000000000000" 1221config PHYSICAL_START 1222 hex 1223 default "0x00000000" 1224endif 1225 1226config ARCH_RANDOM 1227 def_bool n 1228 1229source "net/Kconfig" 1230 1231source "drivers/Kconfig" 1232 1233source "fs/Kconfig" 1234 1235source "lib/Kconfig" 1236 1237source "arch/powerpc/Kconfig.debug" 1238 1239source "security/Kconfig" 1240 1241source "crypto/Kconfig" 1242 1243config PPC_LIB_RHEAP 1244 bool 1245 1246source "arch/powerpc/kvm/Kconfig" 1247 1248source "kernel/livepatch/Kconfig" 1249