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 MMU 17 bool 18 default y 19 20config ARCH_MMAP_RND_BITS_MAX 21 # On Book3S 64, the default virtual address space for 64-bit processes 22 # is 2^47 (128TB). As a maximum, allow randomisation to consume up to 23 # 32T of address space (2^45), which should ensure a reasonable gap 24 # between bottom-up and top-down allocations for applications that 25 # consume "normal" amounts of address space. Book3S 64 only supports 64K 26 # and 4K page sizes. 27 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) 28 default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) 29 # 30 # On all other 64-bit platforms (currently only Book3E), the virtual 31 # address space is 2^46 (64TB). Allow randomisation to consume up to 16T 32 # of address space (2^44). Only 4K page sizes are supported. 33 default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) 34 # 35 # For 32-bit, use the compat values, as they're the same. 36 default ARCH_MMAP_RND_COMPAT_BITS_MAX 37 38config ARCH_MMAP_RND_BITS_MIN 39 # Allow randomisation to consume up to 1GB of address space (2^30). 40 default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) 41 default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) 42 # 43 # For 32-bit, use the compat values, as they're the same. 44 default ARCH_MMAP_RND_COMPAT_BITS_MIN 45 46config ARCH_MMAP_RND_COMPAT_BITS_MAX 47 # Total virtual address space for 32-bit processes is 2^31 (2GB). 48 # Allow randomisation to consume up to 512MB of address space (2^29). 49 default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) 50 default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) 51 default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) 52 default 17 # 17 = 29 (512MB) - 12 (4K) 53 54config ARCH_MMAP_RND_COMPAT_BITS_MIN 55 # Total virtual address space for 32-bit processes is 2^31 (2GB). 56 # Allow randomisation to consume up to 8MB of address space (2^23). 57 default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) 58 default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) 59 default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) 60 default 11 # 11 = 23 (8MB) - 12 (4K) 61 62config HAVE_SETUP_PER_CPU_AREA 63 def_bool PPC64 64 65config NEED_PER_CPU_EMBED_FIRST_CHUNK 66 def_bool PPC64 67 68config NR_IRQS 69 int "Number of virtual interrupt numbers" 70 range 32 32768 71 default "512" 72 help 73 This defines the number of virtual interrupt numbers the kernel 74 can manage. Virtual interrupt numbers are what you see in 75 /proc/interrupts. If you configure your system to have too few, 76 drivers will fail to load or worse - handle with care. 77 78config NMI_IPI 79 bool 80 depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) 81 default y 82 83config PPC_WATCHDOG 84 bool 85 depends on HARDLOCKUP_DETECTOR 86 depends on HAVE_HARDLOCKUP_DETECTOR_ARCH 87 default y 88 help 89 This is a placeholder when the powerpc hardlockup detector 90 watchdog is selected (arch/powerpc/kernel/watchdog.c). It is 91 seleted via the generic lockup detector menu which is why we 92 have no standalone config option for it here. 93 94config STACKTRACE_SUPPORT 95 bool 96 default y 97 98config TRACE_IRQFLAGS_SUPPORT 99 bool 100 default y 101 102config LOCKDEP_SUPPORT 103 bool 104 default y 105 106config RWSEM_GENERIC_SPINLOCK 107 bool 108 109config RWSEM_XCHGADD_ALGORITHM 110 bool 111 default y 112 113config GENERIC_LOCKBREAK 114 bool 115 default y 116 depends on SMP && PREEMPT 117 118config GENERIC_HWEIGHT 119 bool 120 default y 121 122config ARCH_HAS_DMA_SET_COHERENT_MASK 123 bool 124 125config PPC 126 bool 127 default y 128 # 129 # Please keep this list sorted alphabetically. 130 # 131 select ARCH_HAS_DEVMEM_IS_ALLOWED 132 select ARCH_HAS_DMA_SET_COHERENT_MASK 133 select ARCH_HAS_ELF_RANDOMIZE 134 select ARCH_HAS_FORTIFY_SOURCE 135 select ARCH_HAS_GCOV_PROFILE_ALL 136 select ARCH_HAS_PHYS_TO_DMA 137 select ARCH_HAS_PMEM_API if PPC64 138 select ARCH_HAS_PTE_SPECIAL 139 select ARCH_HAS_MEMBARRIER_CALLBACKS 140 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE 141 select ARCH_HAS_SG_CHAIN 142 select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) 143 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 144 select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64 145 select ARCH_HAS_UBSAN_SANITIZE_ALL 146 select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64 147 select ARCH_HAVE_NMI_SAFE_CMPXCHG 148 select ARCH_MIGHT_HAVE_PC_PARPORT 149 select ARCH_MIGHT_HAVE_PC_SERIO 150 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX 151 select ARCH_SUPPORTS_ATOMIC_RMW 152 select ARCH_USE_BUILTIN_BSWAP 153 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 154 select ARCH_WANT_IPC_PARSE_VERSION 155 select ARCH_WEAK_RELEASE_ACQUIRE 156 select BINFMT_ELF 157 select BUILDTIME_EXTABLE_SORT 158 select CLONE_BACKWARDS 159 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 160 select DYNAMIC_FTRACE if FUNCTION_TRACER 161 select EDAC_ATOMIC_SCRUB 162 select EDAC_SUPPORT 163 select GENERIC_ATOMIC64 if PPC32 164 select GENERIC_CLOCKEVENTS 165 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 166 select GENERIC_CMOS_UPDATE 167 select GENERIC_CPU_AUTOPROBE 168 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC 169 select GENERIC_IRQ_SHOW 170 select GENERIC_IRQ_SHOW_LEVEL 171 select GENERIC_SMP_IDLE_THREAD 172 select GENERIC_STRNCPY_FROM_USER 173 select GENERIC_STRNLEN_USER 174 select GENERIC_TIME_VSYSCALL 175 select HAVE_ARCH_AUDITSYSCALL 176 select HAVE_ARCH_JUMP_LABEL 177 select HAVE_ARCH_KGDB 178 select HAVE_ARCH_MMAP_RND_BITS 179 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT 180 select HAVE_ARCH_SECCOMP_FILTER 181 select HAVE_ARCH_TRACEHOOK 182 select HAVE_CBPF_JIT if !PPC64 183 select HAVE_CONTEXT_TRACKING if PPC64 184 select HAVE_DEBUG_KMEMLEAK 185 select HAVE_DEBUG_STACKOVERFLOW 186 select HAVE_DYNAMIC_FTRACE 187 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 188 select HAVE_EBPF_JIT if PPC64 189 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 190 select HAVE_FTRACE_MCOUNT_RECORD 191 select HAVE_FUNCTION_GRAPH_TRACER 192 select HAVE_FUNCTION_TRACER 193 select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC 194 select HAVE_GENERIC_GUP 195 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 196 select HAVE_IDE 197 select HAVE_IOREMAP_PROT 198 select HAVE_IRQ_EXIT_ON_IRQ_STACK 199 select HAVE_KERNEL_GZIP 200 select HAVE_KERNEL_XZ if PPC_BOOK3S 201 select HAVE_KPROBES 202 select HAVE_KPROBES_ON_FTRACE 203 select HAVE_KRETPROBES 204 select HAVE_LD_DEAD_CODE_DATA_ELIMINATION 205 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 206 select HAVE_MEMBLOCK 207 select HAVE_MEMBLOCK_NODE_MAP 208 select HAVE_MOD_ARCH_SPECIFIC 209 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) 210 select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S) 211 select HAVE_OPROFILE 212 select HAVE_OPTPROBES if PPC64 213 select HAVE_PERF_EVENTS 214 select HAVE_PERF_EVENTS_NMI if PPC64 215 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH 216 select HAVE_PERF_REGS 217 select HAVE_PERF_USER_STACK_DUMP 218 select HAVE_RCU_TABLE_FREE if SMP 219 select HAVE_REGS_AND_STACK_ACCESS_API 220 select HAVE_RELIABLE_STACKTRACE if PPC64 && CPU_LITTLE_ENDIAN 221 select HAVE_SYSCALL_TRACEPOINTS 222 select HAVE_VIRT_CPU_ACCOUNTING 223 select HAVE_IRQ_TIME_ACCOUNTING 224 select HAVE_RSEQ 225 select IOMMU_HELPER if PPC64 226 select IRQ_DOMAIN 227 select IRQ_FORCED_THREADING 228 select MODULES_USE_ELF_RELA 229 select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE 230 select NEED_SG_DMA_LENGTH 231 select NO_BOOTMEM 232 select OF 233 select OF_EARLY_FLATTREE 234 select OF_RESERVED_MEM 235 select OLD_SIGACTION if PPC32 236 select OLD_SIGSUSPEND 237 select RTC_LIB 238 select SPARSE_IRQ 239 select SYSCTL_EXCEPTION_TRACE 240 select VIRT_TO_BUS if !PPC64 241 # 242 # Please keep this list sorted alphabetically. 243 # 244 245config PPC_BARRIER_NOSPEC 246 bool 247 default y 248 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E 249 250config GENERIC_CSUM 251 def_bool n 252 253config EARLY_PRINTK 254 bool 255 default y 256 257config PANIC_TIMEOUT 258 int 259 default 180 260 261config COMPAT 262 bool 263 default y if PPC64 264 select COMPAT_BINFMT_ELF 265 select ARCH_WANT_OLD_COMPAT_IPC 266 select COMPAT_OLD_SIGACTION 267 268config SYSVIPC_COMPAT 269 bool 270 depends on COMPAT && SYSVIPC 271 default y 272 273# All PPC32s use generic nvram driver through ppc_md 274config GENERIC_NVRAM 275 bool 276 default y if PPC32 277 278config SCHED_OMIT_FRAME_POINTER 279 bool 280 default y 281 282config ARCH_MAY_HAVE_PC_FDC 283 bool 284 default PCI 285 286config PPC_UDBG_16550 287 bool 288 default n 289 290config GENERIC_TBSYNC 291 bool 292 default y if PPC32 && SMP 293 default n 294 295config AUDIT_ARCH 296 bool 297 default y 298 299config GENERIC_BUG 300 bool 301 default y 302 depends on BUG 303 304config SYS_SUPPORTS_APM_EMULATION 305 default y if PMAC_APM_EMU 306 bool 307 308config EPAPR_BOOT 309 bool 310 help 311 Used to allow a board to specify it wants an ePAPR compliant wrapper. 312 default n 313 314config DEFAULT_UIMAGE 315 bool 316 help 317 Used to allow a board to specify it wants a uImage built by default 318 default n 319 320config ARCH_HIBERNATION_POSSIBLE 321 bool 322 default y 323 324config ARCH_SUSPEND_POSSIBLE 325 def_bool y 326 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 327 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 328 || 44x || 40x 329 330config PPC_DCR_NATIVE 331 bool 332 default n 333 334config PPC_DCR_MMIO 335 bool 336 default n 337 338config PPC_DCR 339 bool 340 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 341 default y 342 343config PPC_OF_PLATFORM_PCI 344 bool 345 depends on PCI 346 depends on PPC64 # not supported on 32 bits yet 347 default n 348 349config ARCH_SUPPORTS_DEBUG_PAGEALLOC 350 depends on PPC32 || PPC_BOOK3S_64 351 def_bool y 352 353config ARCH_SUPPORTS_UPROBES 354 def_bool y 355 356config PPC_ADV_DEBUG_REGS 357 bool 358 depends on 40x || BOOKE 359 default y 360 361config PPC_ADV_DEBUG_IACS 362 int 363 depends on PPC_ADV_DEBUG_REGS 364 default 4 if 44x 365 default 2 366 367config PPC_ADV_DEBUG_DACS 368 int 369 depends on PPC_ADV_DEBUG_REGS 370 default 2 371 372config PPC_ADV_DEBUG_DVCS 373 int 374 depends on PPC_ADV_DEBUG_REGS 375 default 2 if 44x 376 default 0 377 378config PPC_ADV_DEBUG_DAC_RANGE 379 bool 380 depends on PPC_ADV_DEBUG_REGS && 44x 381 default y 382 383config ZONE_DMA32 384 bool 385 default y if PPC64 386 387config PGTABLE_LEVELS 388 int 389 default 2 if !PPC64 390 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64 391 default 4 392 393source "init/Kconfig" 394 395source "kernel/Kconfig.freezer" 396 397source "arch/powerpc/sysdev/Kconfig" 398source "arch/powerpc/platforms/Kconfig" 399 400menu "Kernel options" 401 402config HIGHMEM 403 bool "High memory support" 404 depends on PPC32 405 406source kernel/Kconfig.hz 407source kernel/Kconfig.preempt 408source "fs/Kconfig.binfmt" 409 410config HUGETLB_PAGE_SIZE_VARIABLE 411 bool 412 depends on HUGETLB_PAGE 413 default y 414 415config MATH_EMULATION 416 bool "Math emulation" 417 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE 418 ---help--- 419 Some PowerPC chips designed for embedded applications do not have 420 a floating-point unit and therefore do not implement the 421 floating-point instructions in the PowerPC instruction set. If you 422 say Y here, the kernel will include code to emulate a floating-point 423 unit, which will allow programs that use floating-point 424 instructions to run. 425 426 This is also useful to emulate missing (optional) instructions 427 such as fsqrt on cores that do have an FPU but do not implement 428 them (such as Freescale BookE). 429 430choice 431 prompt "Math emulation options" 432 default MATH_EMULATION_FULL 433 depends on MATH_EMULATION 434 435config MATH_EMULATION_FULL 436 bool "Emulate all the floating point instructions" 437 ---help--- 438 Select this option will enable the kernel to support to emulate 439 all the floating point instructions. If your SoC doesn't have 440 a FPU, you should select this. 441 442config MATH_EMULATION_HW_UNIMPLEMENTED 443 bool "Just emulate the FPU unimplemented instructions" 444 ---help--- 445 Select this if you know there does have a hardware FPU on your 446 SoC, but some floating point instructions are not implemented by that. 447 448endchoice 449 450config PPC_TRANSACTIONAL_MEM 451 bool "Transactional Memory support for POWERPC" 452 depends on PPC_BOOK3S_64 453 depends on SMP 454 select ALTIVEC 455 select VSX 456 default n 457 ---help--- 458 Support user-mode Transactional Memory on POWERPC. 459 460config LD_HEAD_STUB_CATCH 461 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT 462 depends on PPC64 463 default n 464 help 465 Very large kernels can cause linker branch stubs to be generated by 466 code in head_64.S, which moves the head text sections out of their 467 specified location. This option can work around the problem. 468 469 If unsure, say "N". 470 471config MPROFILE_KERNEL 472 depends on PPC64 && CPU_LITTLE_ENDIAN 473 def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) 474 475config HOTPLUG_CPU 476 bool "Support for enabling/disabling CPUs" 477 depends on SMP && (PPC_PSERIES || \ 478 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 479 ---help--- 480 Say Y here to be able to disable and re-enable individual 481 CPUs at runtime on SMP machines. 482 483 Say N if you are unsure. 484 485config ARCH_CPU_PROBE_RELEASE 486 def_bool y 487 depends on HOTPLUG_CPU 488 489config ARCH_ENABLE_MEMORY_HOTPLUG 490 def_bool y 491 492config ARCH_HAS_WALK_MEMORY 493 def_bool y 494 495config ARCH_ENABLE_MEMORY_HOTREMOVE 496 def_bool y 497 498config PPC64_SUPPORTS_MEMORY_FAILURE 499 bool "Add support for memory hwpoison" 500 depends on PPC_BOOK3S_64 501 default "y" if PPC_POWERNV 502 select ARCH_SUPPORTS_MEMORY_FAILURE 503 504config KEXEC 505 bool "kexec system call" 506 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 507 select KEXEC_CORE 508 help 509 kexec is a system call that implements the ability to shutdown your 510 current kernel, and to start another kernel. It is like a reboot 511 but it is independent of the system firmware. And like a reboot 512 you can start any kernel with it, not just Linux. 513 514 The name comes from the similarity to the exec system call. 515 516 It is an ongoing process to be certain the hardware in a machine 517 is properly shutdown, so do not be surprised if this code does not 518 initially work for you. As of this writing the exact hardware 519 interface is strongly in flux, so no good recommendation can be 520 made. 521 522config KEXEC_FILE 523 bool "kexec file based system call" 524 select KEXEC_CORE 525 select HAVE_IMA_KEXEC 526 select BUILD_BIN2C 527 depends on PPC64 528 depends on CRYPTO=y 529 depends on CRYPTO_SHA256=y 530 help 531 This is a new version of the kexec system call. This call is 532 file based and takes in file descriptors as system call arguments 533 for kernel and initramfs as opposed to a list of segments as is the 534 case for the older kexec call. 535 536config ARCH_HAS_KEXEC_PURGATORY 537 def_bool KEXEC_FILE 538 539config RELOCATABLE 540 bool "Build a relocatable kernel" 541 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) 542 select NONSTATIC_KERNEL 543 select MODULE_REL_CRCS if MODVERSIONS 544 help 545 This builds a kernel image that is capable of running at the 546 location the kernel is loaded at. For ppc32, there is no any 547 alignment restrictions, and this feature is a superset of 548 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 549 16k-aligned base address. The kernel is linked as a 550 position-independent executable (PIE) and contains dynamic relocations 551 which are processed early in the bootup process. 552 553 One use is for the kexec on panic case where the recovery kernel 554 must live at a different physical address than the primary 555 kernel. 556 557 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 558 it has been loaded at and the compile time physical addresses 559 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 560 setting can still be useful to bootwrappers that need to know the 561 load address of the kernel (eg. u-boot/mkimage). 562 563config RELOCATABLE_TEST 564 bool "Test relocatable kernel" 565 depends on (PPC64 && RELOCATABLE) 566 default n 567 help 568 This runs the relocatable kernel at the address it was initially 569 loaded at, which tends to be non-zero and therefore test the 570 relocation code. 571 572config CRASH_DUMP 573 bool "Build a dump capture kernel" 574 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) 575 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE 576 help 577 Build a kernel suitable for use as a dump capture kernel. 578 The same kernel binary can be used as production kernel and dump 579 capture kernel. 580 581config FA_DUMP 582 bool "Firmware-assisted dump" 583 depends on PPC64 && PPC_RTAS 584 select CRASH_CORE 585 select CRASH_DUMP 586 help 587 A robust mechanism to get reliable kernel crash dump with 588 assistance from firmware. This approach does not use kexec, 589 instead firmware assists in booting the capture kernel 590 while preserving memory contents. Firmware-assisted dump 591 is meant to be a kdump replacement offering robustness and 592 speed not possible without system firmware assistance. 593 594 If unsure, say "N" 595 596config IRQ_ALL_CPUS 597 bool "Distribute interrupts on all CPUs by default" 598 depends on SMP 599 help 600 This option gives the kernel permission to distribute IRQs across 601 multiple CPUs. Saying N here will route all IRQs to the first 602 CPU. Generally saying Y is safe, although some problems have been 603 reported with SMP Power Macintoshes with this option enabled. 604 605config NUMA 606 bool "NUMA support" 607 depends on PPC64 608 default y if SMP && PPC_PSERIES 609 610config NODES_SHIFT 611 int 612 default "8" if PPC64 613 default "4" 614 depends on NEED_MULTIPLE_NODES 615 616config USE_PERCPU_NUMA_NODE_ID 617 def_bool y 618 depends on NUMA 619 620config HAVE_MEMORYLESS_NODES 621 def_bool y 622 depends on NUMA 623 624config ARCH_SELECT_MEMORY_MODEL 625 def_bool y 626 depends on PPC64 627 628config ARCH_FLATMEM_ENABLE 629 def_bool y 630 depends on (PPC64 && !NUMA) || PPC32 631 632config ARCH_SPARSEMEM_ENABLE 633 def_bool y 634 depends on PPC64 635 select SPARSEMEM_VMEMMAP_ENABLE 636 637config ARCH_SPARSEMEM_DEFAULT 638 def_bool y 639 depends on PPC_BOOK3S_64 640 641config SYS_SUPPORTS_HUGETLBFS 642 bool 643 644config ILLEGAL_POINTER_VALUE 645 hex 646 # This is roughly half way between the top of user space and the bottom 647 # of kernel space, which seems about as good as we can get. 648 default 0x5deadbeef0000000 if PPC64 649 default 0 650 651source "mm/Kconfig" 652 653config ARCH_MEMORY_PROBE 654 def_bool y 655 depends on MEMORY_HOTPLUG 656 657# Some NUMA nodes have memory ranges that span 658# other nodes. Even though a pfn is valid and 659# between a node's start and end pfns, it may not 660# reside on that node. See memmap_init_zone() 661# for details. 662config NODES_SPAN_OTHER_NODES 663 def_bool y 664 depends on NEED_MULTIPLE_NODES 665 666config STDBINUTILS 667 bool "Using standard binutils settings" 668 depends on 44x 669 default y 670 help 671 Turning this option off allows you to select 256KB PAGE_SIZE on 44x. 672 Note, that kernel will be able to run only those applications, 673 which had been compiled using binutils later than 2.17.50.0.3 with 674 '-zmax-page-size' set to 256K (the default is 64K). Or, if using 675 the older binutils, you can patch them with a trivial patch, which 676 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. 677 678choice 679 prompt "Page size" 680 default PPC_4K_PAGES 681 help 682 Select the kernel logical page size. Increasing the page size 683 will reduce software overhead at each page boundary, allow 684 hardware prefetch mechanisms to be more effective, and allow 685 larger dma transfers increasing IO efficiency and reducing 686 overhead. However the utilization of memory will increase. 687 For example, each cached file will using a multiple of the 688 page size to hold its contents and the difference between the 689 end of file and the end of page is wasted. 690 691 Some dedicated systems, such as software raid serving with 692 accelerated calculations, have shown significant increases. 693 694 If you configure a 64 bit kernel for 64k pages but the 695 processor does not support them, then the kernel will simulate 696 them with 4k pages, loading them on demand, but with the 697 reduced software overhead and larger internal fragmentation. 698 For the 32 bit kernel, a large page option will not be offered 699 unless it is supported by the configured processor. 700 701 If unsure, choose 4K_PAGES. 702 703config PPC_4K_PAGES 704 bool "4k page size" 705 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 706 707config PPC_16K_PAGES 708 bool "16k page size" 709 depends on 44x || PPC_8xx 710 711config PPC_64K_PAGES 712 bool "64k page size" 713 depends on !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_64) 714 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 715 716config PPC_256K_PAGES 717 bool "256k page size" 718 depends on 44x && !STDBINUTILS 719 help 720 Make the page size 256k. 721 722 As the ELF standard only requires alignment to support page 723 sizes up to 64k, you will need to compile all of your user 724 space applications with a non-standard binutils settings 725 (see the STDBINUTILS description for details). 726 727 Say N unless you know what you are doing. 728 729endchoice 730 731config THREAD_SHIFT 732 int "Thread shift" if EXPERT 733 range 13 15 734 default "15" if PPC_256K_PAGES 735 default "14" if PPC64 736 default "13" 737 help 738 Used to define the stack size. The default is almost always what you 739 want. Only change this if you know what you are doing. 740 741config FORCE_MAX_ZONEORDER 742 int "Maximum zone order" 743 range 8 9 if PPC64 && PPC_64K_PAGES 744 default "9" if PPC64 && PPC_64K_PAGES 745 range 13 13 if PPC64 && !PPC_64K_PAGES 746 default "13" if PPC64 && !PPC_64K_PAGES 747 range 9 64 if PPC32 && PPC_16K_PAGES 748 default "9" if PPC32 && PPC_16K_PAGES 749 range 7 64 if PPC32 && PPC_64K_PAGES 750 default "7" if PPC32 && PPC_64K_PAGES 751 range 5 64 if PPC32 && PPC_256K_PAGES 752 default "5" if PPC32 && PPC_256K_PAGES 753 range 11 64 754 default "11" 755 help 756 The kernel memory allocator divides physically contiguous memory 757 blocks into "zones", where each zone is a power of two number of 758 pages. This option selects the largest power of two that the kernel 759 keeps in the memory allocator. If you need to allocate very large 760 blocks of physically contiguous memory, then you may need to 761 increase this value. 762 763 This config option is actually maximum order plus one. For example, 764 a value of 11 means that the largest free memory block is 2^10 pages. 765 766 The page size is not necessarily 4KB. For example, on 64-bit 767 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 768 this in mind when choosing a value for this option. 769 770config PPC_SUBPAGE_PROT 771 bool "Support setting protections for 4k subpages" 772 depends on PPC_BOOK3S_64 && PPC_64K_PAGES 773 help 774 This option adds support for a system call to allow user programs 775 to set access permissions (read/write, readonly, or no access) 776 on the 4k subpages of each 64k page. 777 778config PPC_COPRO_BASE 779 bool 780 default n 781 782config SCHED_SMT 783 bool "SMT (Hyperthreading) scheduler support" 784 depends on PPC64 && SMP 785 help 786 SMT scheduler support improves the CPU scheduler's decision making 787 when dealing with POWER5 cpus at a cost of slightly increased 788 overhead in some places. If unsure say N here. 789 790config PPC_DENORMALISATION 791 bool "PowerPC denormalisation exception handling" 792 depends on PPC_BOOK3S_64 793 default "y" if PPC_POWERNV 794 ---help--- 795 Add support for handling denormalisation of single precision 796 values. Useful for bare metal only. If unsure say Y here. 797 798config CMDLINE_BOOL 799 bool "Default bootloader kernel arguments" 800 801config CMDLINE 802 string "Initial kernel command string" 803 depends on CMDLINE_BOOL 804 default "console=ttyS0,9600 console=tty0 root=/dev/sda2" 805 help 806 On some platforms, there is currently no way for the boot loader to 807 pass arguments to the kernel. For these platforms, you can supply 808 some command-line options at build time by entering them here. In 809 most cases you will need to specify the root device here. 810 811config CMDLINE_FORCE 812 bool "Always use the default kernel command string" 813 depends on CMDLINE_BOOL 814 help 815 Always use the default kernel command string, even if the boot 816 loader passes other arguments to the kernel. 817 This is useful if you cannot or don't want to change the 818 command-line options your boot loader passes to the kernel. 819 820config EXTRA_TARGETS 821 string "Additional default image types" 822 help 823 List additional targets to be built by the bootwrapper here (separated 824 by spaces). This is useful for targets that depend of device tree 825 files in the .dts directory. 826 827 Targets in this list will be build as part of the default build 828 target, or when the user does a 'make zImage' or a 829 'make zImage.initrd'. 830 831 If unsure, leave blank 832 833config ARCH_WANTS_FREEZER_CONTROL 834 def_bool y 835 depends on ADB_PMU 836 837source kernel/power/Kconfig 838 839config SECCOMP 840 bool "Enable seccomp to safely compute untrusted bytecode" 841 depends on PROC_FS 842 default y 843 help 844 This kernel feature is useful for number crunching applications 845 that may need to compute untrusted bytecode during their 846 execution. By using pipes or other transports made available to 847 the process as file descriptors supporting the read/write 848 syscalls, it's possible to isolate those applications in 849 their own address space using seccomp. Once seccomp is 850 enabled via /proc/<pid>/seccomp, it cannot be disabled 851 and the task is only allowed to execute a few safe syscalls 852 defined by each seccomp mode. 853 854 If unsure, say Y. Only embedded should say N here. 855 856config PPC_MEM_KEYS 857 prompt "PowerPC Memory Protection Keys" 858 def_bool y 859 depends on PPC_BOOK3S_64 860 select ARCH_USES_HIGH_VMA_FLAGS 861 select ARCH_HAS_PKEYS 862 help 863 Memory Protection Keys provides a mechanism for enforcing 864 page-based protections, but without requiring modification of the 865 page tables when an application changes protection domains. 866 867 For details, see Documentation/vm/protection-keys.rst 868 869 If unsure, say y. 870 871endmenu 872 873config ISA_DMA_API 874 bool 875 default PCI 876 877menu "Bus options" 878 879config ISA 880 bool "Support for ISA-bus hardware" 881 depends on PPC_CHRP 882 select PPC_I8259 883 help 884 Find out whether you have ISA slots on your motherboard. ISA is the 885 name of a bus system, i.e. the way the CPU talks to the other stuff 886 inside your box. If you have an Apple machine, say N here; if you 887 have an IBM RS/6000 or pSeries machine, say Y. If you have an 888 embedded board, consult your board documentation. 889 890config ZONE_DMA 891 bool 892 default y 893 894config GENERIC_ISA_DMA 895 bool 896 depends on ISA_DMA_API 897 default y 898 899config PPC_INDIRECT_PCI 900 bool 901 depends on PCI 902 default y if 40x || 44x 903 default n 904 905config EISA 906 bool 907 908config SBUS 909 bool 910 911config FSL_SOC 912 bool 913 914config FSL_PCI 915 bool 916 select PPC_INDIRECT_PCI 917 select PCI_QUIRKS 918 919config FSL_PMC 920 bool 921 default y 922 depends on SUSPEND && (PPC_85xx || PPC_86xx) 923 help 924 Freescale MPC85xx/MPC86xx power management controller support 925 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 926 927config PPC4xx_CPM 928 bool 929 default y 930 depends on SUSPEND && (44x || 40x) 931 help 932 PPC4xx Clock Power Management (CPM) support (suspend/resume). 933 It also enables support for two different idle states (idle-wait 934 and idle-doze). 935 936config 4xx_SOC 937 bool 938 939config FSL_LBC 940 bool "Freescale Local Bus support" 941 help 942 Enables reporting of errors from the Freescale local bus 943 controller. Also contains some common code used by 944 drivers for specific local bus peripherals. 945 946config FSL_GTM 947 bool 948 depends on PPC_83xx || QUICC_ENGINE || CPM2 949 help 950 Freescale General-purpose Timers support 951 952# Yes MCA RS/6000s exist but Linux-PPC does not currently support any 953config MCA 954 bool 955 956# Platforms that what PCI turned unconditionally just do select PCI 957# in their config node. Platforms that want to choose at config 958# time should select PPC_PCI_CHOICE 959config PPC_PCI_CHOICE 960 bool 961 962config PCI 963 bool "PCI support" if PPC_PCI_CHOICE 964 default y if !40x && !CPM2 && !PPC_8xx && !PPC_83xx \ 965 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON 966 default PCI_QSPAN if PPC_8xx 967 select GENERIC_PCI_IOMAP 968 help 969 Find out whether your system includes a PCI bus. PCI is the name of 970 a bus system, i.e. the way the CPU talks to the other stuff inside 971 your box. If you say Y here, the kernel will include drivers and 972 infrastructure code to support PCI bus devices. 973 974config PCI_DOMAINS 975 def_bool PCI 976 977config PCI_SYSCALL 978 def_bool PCI 979 980config PCI_QSPAN 981 bool "QSpan PCI" 982 depends on PPC_8xx 983 select PPC_I8259 984 help 985 Say Y here if you have a system based on a Motorola 8xx-series 986 embedded processor with a QSPAN PCI interface, otherwise say N. 987 988config PCI_8260 989 bool 990 depends on PCI && 8260 991 select PPC_INDIRECT_PCI 992 default y 993 994source "drivers/pci/Kconfig" 995 996source "drivers/pcmcia/Kconfig" 997 998config HAS_RAPIDIO 999 bool 1000 default n 1001 1002config RAPIDIO 1003 tristate "RapidIO support" 1004 depends on HAS_RAPIDIO || PCI 1005 help 1006 If you say Y here, the kernel will include drivers and 1007 infrastructure code to support RapidIO interconnect devices. 1008 1009config FSL_RIO 1010 bool "Freescale Embedded SRIO Controller support" 1011 depends on RAPIDIO = y && HAS_RAPIDIO 1012 default "n" 1013 ---help--- 1014 Include support for RapidIO controller on Freescale embedded 1015 processors (MPC8548, MPC8641, etc). 1016 1017source "drivers/rapidio/Kconfig" 1018 1019endmenu 1020 1021config NONSTATIC_KERNEL 1022 bool 1023 default n 1024 1025menu "Advanced setup" 1026 depends on PPC32 1027 1028config ADVANCED_OPTIONS 1029 bool "Prompt for advanced kernel configuration options" 1030 help 1031 This option will enable prompting for a variety of advanced kernel 1032 configuration options. These options can cause the kernel to not 1033 work if they are set incorrectly, but can be used to optimize certain 1034 aspects of kernel memory management. 1035 1036 Unless you know what you are doing, say N here. 1037 1038comment "Default settings for advanced configuration options are used" 1039 depends on !ADVANCED_OPTIONS 1040 1041config LOWMEM_SIZE_BOOL 1042 bool "Set maximum low memory" 1043 depends on ADVANCED_OPTIONS 1044 help 1045 This option allows you to set the maximum amount of memory which 1046 will be used as "low memory", that is, memory which the kernel can 1047 access directly, without having to set up a kernel virtual mapping. 1048 This can be useful in optimizing the layout of kernel virtual 1049 memory. 1050 1051 Say N here unless you know what you are doing. 1052 1053config LOWMEM_SIZE 1054 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1055 default "0x30000000" 1056 1057config LOWMEM_CAM_NUM_BOOL 1058 bool "Set number of CAMs to use to map low memory" 1059 depends on ADVANCED_OPTIONS && FSL_BOOKE 1060 help 1061 This option allows you to set the maximum number of CAM slots that 1062 will be used to map low memory. There are a limited number of slots 1063 available and even more limited number that will fit in the L1 MMU. 1064 However, using more entries will allow mapping more low memory. This 1065 can be useful in optimizing the layout of kernel virtual memory. 1066 1067 Say N here unless you know what you are doing. 1068 1069config LOWMEM_CAM_NUM 1070 depends on FSL_BOOKE 1071 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1072 default 3 1073 1074config DYNAMIC_MEMSTART 1075 bool "Enable page aligned dynamic load address for kernel" 1076 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 1077 select NONSTATIC_KERNEL 1078 help 1079 This option enables the kernel to be loaded at any page aligned 1080 physical address. The kernel creates a mapping from KERNELBASE to 1081 the address where the kernel is loaded. The page size here implies 1082 the TLB page size of the mapping for kernel on the particular platform. 1083 Please refer to the init code for finding the TLB page size. 1084 1085 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1086 kernel image, where the only restriction is the page aligned kernel 1087 load address. When this option is enabled, the compile time physical 1088 address CONFIG_PHYSICAL_START is ignored. 1089 1090 This option is overridden by CONFIG_RELOCATABLE 1091 1092config PAGE_OFFSET_BOOL 1093 bool "Set custom page offset address" 1094 depends on ADVANCED_OPTIONS 1095 help 1096 This option allows you to set the kernel virtual address at which 1097 the kernel will map low memory. This can be useful in optimizing 1098 the virtual memory layout of the system. 1099 1100 Say N here unless you know what you are doing. 1101 1102config PAGE_OFFSET 1103 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1104 default "0xc0000000" 1105 1106config KERNEL_START_BOOL 1107 bool "Set custom kernel base address" 1108 depends on ADVANCED_OPTIONS 1109 help 1110 This option allows you to set the kernel virtual address at which 1111 the kernel will be loaded. Normally this should match PAGE_OFFSET 1112 however there are times (like kdump) that one might not want them 1113 to be the same. 1114 1115 Say N here unless you know what you are doing. 1116 1117config KERNEL_START 1118 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1119 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1120 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1121 default "0xc0000000" 1122 1123config PHYSICAL_START_BOOL 1124 bool "Set physical address where the kernel is loaded" 1125 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1126 help 1127 This gives the physical address where the kernel is loaded. 1128 1129 Say N here unless you know what you are doing. 1130 1131config PHYSICAL_START 1132 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1133 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL 1134 default "0x00000000" 1135 1136config PHYSICAL_ALIGN 1137 hex 1138 default "0x04000000" if FSL_BOOKE 1139 help 1140 This value puts the alignment restrictions on physical address 1141 where kernel is loaded and run from. Kernel is compiled for an 1142 address which meets above alignment restriction. 1143 1144config TASK_SIZE_BOOL 1145 bool "Set custom user task size" 1146 depends on ADVANCED_OPTIONS 1147 help 1148 This option allows you to set the amount of virtual address space 1149 allocated to user tasks. This can be useful in optimizing the 1150 virtual memory layout of the system. 1151 1152 Say N here unless you know what you are doing. 1153 1154config TASK_SIZE 1155 hex "Size of user task space" if TASK_SIZE_BOOL 1156 default "0x80000000" if PPC_8xx 1157 default "0xc0000000" 1158 1159config CONSISTENT_SIZE_BOOL 1160 bool "Set custom consistent memory pool size" 1161 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE 1162 help 1163 This option allows you to set the size of the 1164 consistent memory pool. This pool of virtual memory 1165 is used to make consistent memory allocations. 1166 1167config CONSISTENT_SIZE 1168 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL 1169 default "0x00200000" if NOT_COHERENT_CACHE 1170 1171config PIN_TLB 1172 bool "Pinned Kernel TLBs (860 ONLY)" 1173 depends on ADVANCED_OPTIONS && PPC_8xx && \ 1174 !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX 1175 1176config PIN_TLB_DATA 1177 bool "Pinned TLB for DATA" 1178 depends on PIN_TLB 1179 default y 1180 1181config PIN_TLB_IMMR 1182 bool "Pinned TLB for IMMR" 1183 depends on PIN_TLB 1184 default y 1185 1186config PIN_TLB_TEXT 1187 bool "Pinned TLB for TEXT" 1188 depends on PIN_TLB 1189 default y 1190endmenu 1191 1192if PPC64 1193# This value must have zeroes in the bottom 60 bits otherwise lots will break 1194config PAGE_OFFSET 1195 hex 1196 default "0xc000000000000000" 1197config KERNEL_START 1198 hex 1199 default "0xc000000000000000" 1200config PHYSICAL_START 1201 hex 1202 default "0x00000000" 1203endif 1204 1205config ARCH_RANDOM 1206 def_bool n 1207 1208source "net/Kconfig" 1209 1210source "drivers/Kconfig" 1211 1212source "fs/Kconfig" 1213 1214source "lib/Kconfig" 1215 1216source "arch/powerpc/Kconfig.debug" 1217 1218source "security/Kconfig" 1219 1220source "crypto/Kconfig" 1221 1222config PPC_LIB_RHEAP 1223 bool 1224 1225source "arch/powerpc/kvm/Kconfig" 1226 1227source "kernel/livepatch/Kconfig" 1228