1# SPDX-License-Identifier: GPL-2.0 2source "arch/powerpc/platforms/Kconfig.cputype" 3 4config 32BIT 5 bool 6 default y if PPC32 7 8config 64BIT 9 bool 10 default y if PPC64 11 12config MMU 13 bool 14 default y 15 16config ARCH_MMAP_RND_BITS_MAX 17 # On Book3S 64, the default virtual address space for 64-bit processes 18 # is 2^47 (128TB). As a maximum, allow randomisation to consume up to 19 # 32T of address space (2^45), which should ensure a reasonable gap 20 # between bottom-up and top-down allocations for applications that 21 # consume "normal" amounts of address space. Book3S 64 only supports 64K 22 # and 4K page sizes. 23 default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) 24 default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) 25 # 26 # On all other 64-bit platforms (currently only Book3E), the virtual 27 # address space is 2^46 (64TB). Allow randomisation to consume up to 16T 28 # of address space (2^44). Only 4K page sizes are supported. 29 default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) 30 # 31 # For 32-bit, use the compat values, as they're the same. 32 default ARCH_MMAP_RND_COMPAT_BITS_MAX 33 34config ARCH_MMAP_RND_BITS_MIN 35 # Allow randomisation to consume up to 1GB of address space (2^30). 36 default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) 37 default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) 38 # 39 # For 32-bit, use the compat values, as they're the same. 40 default ARCH_MMAP_RND_COMPAT_BITS_MIN 41 42config ARCH_MMAP_RND_COMPAT_BITS_MAX 43 # Total virtual address space for 32-bit processes is 2^31 (2GB). 44 # Allow randomisation to consume up to 512MB of address space (2^29). 45 default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) 46 default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) 47 default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) 48 default 17 # 17 = 29 (512MB) - 12 (4K) 49 50config ARCH_MMAP_RND_COMPAT_BITS_MIN 51 # Total virtual address space for 32-bit processes is 2^31 (2GB). 52 # Allow randomisation to consume up to 8MB of address space (2^23). 53 default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) 54 default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) 55 default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) 56 default 11 # 11 = 23 (8MB) - 12 (4K) 57 58config NR_IRQS 59 int "Number of virtual interrupt numbers" 60 range 32 1048576 61 default "512" 62 help 63 This defines the number of virtual interrupt numbers the kernel 64 can manage. Virtual interrupt numbers are what you see in 65 /proc/interrupts. If you configure your system to have too few, 66 drivers will fail to load or worse - handle with care. 67 68config NMI_IPI 69 bool 70 depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) 71 default y 72 73config PPC_WATCHDOG 74 bool 75 depends on HARDLOCKUP_DETECTOR 76 depends on HAVE_HARDLOCKUP_DETECTOR_ARCH 77 default y 78 help 79 This is a placeholder when the powerpc hardlockup detector 80 watchdog is selected (arch/powerpc/kernel/watchdog.c). It is 81 selected via the generic lockup detector menu which is why we 82 have no standalone config option for it here. 83 84config STACKTRACE_SUPPORT 85 bool 86 default y 87 88config LOCKDEP_SUPPORT 89 bool 90 default y 91 92config GENERIC_LOCKBREAK 93 bool 94 default y 95 depends on SMP && PREEMPTION 96 97config GENERIC_HWEIGHT 98 bool 99 default y 100 101config PPC 102 bool 103 default y 104 # 105 # Please keep this list sorted alphabetically. 106 # 107 select ARCH_32BIT_OFF_T if PPC32 108 select ARCH_ENABLE_MEMORY_HOTPLUG 109 select ARCH_ENABLE_MEMORY_HOTREMOVE 110 select ARCH_HAS_COPY_MC if PPC64 111 select ARCH_HAS_DEBUG_VIRTUAL 112 select ARCH_HAS_DEBUG_VM_PGTABLE 113 select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX 114 select ARCH_HAS_DEVMEM_IS_ALLOWED 115 select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES 116 select ARCH_HAS_ELF_RANDOMIZE 117 select ARCH_HAS_FORTIFY_SOURCE 118 select ARCH_HAS_GCOV_PROFILE_ALL 119 select ARCH_HAS_HUGEPD if HUGETLB_PAGE 120 select ARCH_HAS_KCOV 121 select ARCH_HAS_MEMBARRIER_CALLBACKS 122 select ARCH_HAS_MEMBARRIER_SYNC_CORE 123 select ARCH_HAS_MEMREMAP_COMPAT_ALIGN 124 select ARCH_HAS_MMIOWB if PPC64 125 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE 126 select ARCH_HAS_PHYS_TO_DMA 127 select ARCH_HAS_PMEM_API 128 select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 129 select ARCH_HAS_PTE_SPECIAL 130 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 131 select ARCH_HAS_SET_MEMORY 132 select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION 133 select ARCH_HAS_STRICT_KERNEL_RWX if FSL_BOOKE && !HIBERNATION && !RANDOMIZE_BASE 134 select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32 135 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 136 select ARCH_HAS_UACCESS_FLUSHCACHE 137 select ARCH_HAS_UBSAN_SANITIZE_ALL 138 select ARCH_HAVE_NMI_SAFE_CMPXCHG 139 select ARCH_KEEP_MEMBLOCK 140 select ARCH_MIGHT_HAVE_PC_PARPORT 141 select ARCH_MIGHT_HAVE_PC_SERIO 142 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX 143 select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT 144 select ARCH_STACKWALK 145 select ARCH_SUPPORTS_ATOMIC_RMW 146 select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x 147 select ARCH_USE_BUILTIN_BSWAP 148 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 149 select ARCH_USE_MEMTEST 150 select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS 151 select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS 152 select ARCH_WANT_IPC_PARSE_VERSION 153 select ARCH_WANT_IRQS_OFF_ACTIVATE_MM 154 select ARCH_WANT_LD_ORPHAN_WARN 155 select ARCH_WEAK_RELEASE_ACQUIRE 156 select BINFMT_ELF 157 select BUILDTIME_TABLE_SORT 158 select CLONE_BACKWARDS 159 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 160 select DMA_OPS_BYPASS if PPC64 161 select DMA_OPS if PPC64 162 select DYNAMIC_FTRACE if FUNCTION_TRACER 163 select EDAC_ATOMIC_SCRUB 164 select EDAC_SUPPORT 165 select GENERIC_ATOMIC64 if PPC32 166 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 167 select GENERIC_CMOS_UPDATE 168 select GENERIC_CPU_AUTOPROBE 169 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC 170 select GENERIC_EARLY_IOREMAP 171 select GENERIC_GETTIMEOFDAY 172 select GENERIC_IRQ_SHOW 173 select GENERIC_IRQ_SHOW_LEVEL 174 select GENERIC_PCI_IOMAP if PCI 175 select GENERIC_PTDUMP 176 select GENERIC_SMP_IDLE_THREAD 177 select GENERIC_TIME_VSYSCALL 178 select GENERIC_VDSO_TIME_NS 179 select HAVE_ARCH_AUDITSYSCALL 180 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP 181 select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx 182 select HAVE_ARCH_JUMP_LABEL 183 select HAVE_ARCH_JUMP_LABEL_RELATIVE 184 select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 185 select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14 186 select HAVE_ARCH_KFENCE if PPC_BOOK3S_32 || PPC_8xx || 40x 187 select HAVE_ARCH_KGDB 188 select HAVE_ARCH_MMAP_RND_BITS 189 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT 190 select HAVE_ARCH_NVRAM_OPS 191 select HAVE_ARCH_SECCOMP_FILTER 192 select HAVE_ARCH_TRACEHOOK 193 select HAVE_ASM_MODVERSIONS 194 select HAVE_CONTEXT_TRACKING if PPC64 195 select HAVE_C_RECORDMCOUNT 196 select HAVE_DEBUG_KMEMLEAK 197 select HAVE_DEBUG_STACKOVERFLOW 198 select HAVE_DYNAMIC_FTRACE 199 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL 200 select HAVE_EBPF_JIT 201 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) 202 select HAVE_FAST_GUP 203 select HAVE_FTRACE_MCOUNT_RECORD 204 select HAVE_FUNCTION_ERROR_INJECTION 205 select HAVE_FUNCTION_GRAPH_TRACER 206 select HAVE_FUNCTION_TRACER 207 select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC 208 select HAVE_GENERIC_VDSO 209 select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP 210 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH 211 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 212 select HAVE_IOREMAP_PROT 213 select HAVE_IRQ_EXIT_ON_IRQ_STACK 214 select HAVE_IRQ_TIME_ACCOUNTING 215 select HAVE_KERNEL_GZIP 216 select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE 217 select HAVE_KERNEL_LZO if DEFAULT_UIMAGE 218 select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x 219 select HAVE_KPROBES 220 select HAVE_KPROBES_ON_FTRACE 221 select HAVE_KRETPROBES 222 select HAVE_LD_DEAD_CODE_DATA_ELIMINATION 223 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 224 select HAVE_MOD_ARCH_SPECIFIC 225 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) 226 select HAVE_OPTPROBES 227 select HAVE_PERF_EVENTS 228 select HAVE_PERF_EVENTS_NMI if PPC64 229 select HAVE_PERF_REGS 230 select HAVE_PERF_USER_STACK_DUMP 231 select HAVE_REGS_AND_STACK_ACCESS_API 232 select HAVE_RELIABLE_STACKTRACE 233 select HAVE_RSEQ 234 select HAVE_SETUP_PER_CPU_AREA if PPC64 235 select HAVE_SOFTIRQ_ON_OWN_STACK 236 select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) 237 select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) 238 select HAVE_STATIC_CALL if PPC32 239 select HAVE_SYSCALL_TRACEPOINTS 240 select HAVE_VIRT_CPU_ACCOUNTING 241 select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE 242 select IOMMU_HELPER if PPC64 243 select IRQ_DOMAIN 244 select IRQ_FORCED_THREADING 245 select MMU_GATHER_PAGE_SIZE 246 select MMU_GATHER_RCU_TABLE_FREE 247 select MODULES_USE_ELF_RELA 248 select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE 249 select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64 250 select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64 251 select NEED_SG_DMA_LENGTH 252 select OF 253 select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE 254 select OF_EARLY_FLATTREE 255 select OLD_SIGACTION if PPC32 256 select OLD_SIGSUSPEND 257 select PCI_DOMAINS if PCI 258 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 259 select PCI_SYSCALL if PCI 260 select PPC_DAWR if PPC64 261 select RTC_LIB 262 select SPARSE_IRQ 263 select STRICT_KERNEL_RWX if STRICT_MODULE_RWX 264 select SYSCTL_EXCEPTION_TRACE 265 select THREAD_INFO_IN_TASK 266 select TRACE_IRQFLAGS_SUPPORT 267 select VIRT_TO_BUS if !PPC64 268 # 269 # Please keep this list sorted alphabetically. 270 # 271 272config PPC_BARRIER_NOSPEC 273 bool 274 default y 275 depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E 276 277config EARLY_PRINTK 278 bool 279 default y 280 281config PANIC_TIMEOUT 282 int 283 default 180 284 285config COMPAT 286 bool "Enable support for 32bit binaries" 287 depends on PPC64 288 depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 289 default y if !CPU_LITTLE_ENDIAN 290 select ARCH_WANT_OLD_COMPAT_IPC 291 select COMPAT_OLD_SIGACTION 292 293config SYSVIPC_COMPAT 294 bool 295 depends on COMPAT && SYSVIPC 296 default y 297 298config SCHED_OMIT_FRAME_POINTER 299 bool 300 default y 301 302config ARCH_MAY_HAVE_PC_FDC 303 bool 304 default PCI 305 306config PPC_UDBG_16550 307 bool 308 309config GENERIC_TBSYNC 310 bool 311 default y if PPC32 && SMP 312 313config AUDIT_ARCH 314 bool 315 default y 316 317config GENERIC_BUG 318 bool 319 default y 320 depends on BUG 321 322config GENERIC_BUG_RELATIVE_POINTERS 323 def_bool y 324 depends on GENERIC_BUG 325 326config SYS_SUPPORTS_APM_EMULATION 327 default y if PMAC_APM_EMU 328 bool 329 330config EPAPR_BOOT 331 bool 332 help 333 Used to allow a board to specify it wants an ePAPR compliant wrapper. 334 335config DEFAULT_UIMAGE 336 bool 337 help 338 Used to allow a board to specify it wants a uImage built by default 339 340config ARCH_HIBERNATION_POSSIBLE 341 bool 342 default y 343 344config ARCH_SUSPEND_POSSIBLE 345 def_bool y 346 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 347 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 348 || 44x || 40x 349 350config ARCH_SUSPEND_NONZERO_CPU 351 def_bool y 352 depends on PPC_POWERNV || PPC_PSERIES 353 354config PPC_DCR_NATIVE 355 bool 356 357config PPC_DCR_MMIO 358 bool 359 360config PPC_DCR 361 bool 362 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 363 default y 364 365config PPC_OF_PLATFORM_PCI 366 bool 367 depends on PCI 368 depends on PPC64 # not supported on 32 bits yet 369 370config ARCH_SUPPORTS_UPROBES 371 def_bool y 372 373config PPC_ADV_DEBUG_REGS 374 bool 375 depends on 40x || BOOKE 376 default y 377 378config PPC_ADV_DEBUG_IACS 379 int 380 depends on PPC_ADV_DEBUG_REGS 381 default 4 if 44x 382 default 2 383 384config PPC_ADV_DEBUG_DACS 385 int 386 depends on PPC_ADV_DEBUG_REGS 387 default 2 388 389config PPC_ADV_DEBUG_DVCS 390 int 391 depends on PPC_ADV_DEBUG_REGS 392 default 2 if 44x 393 default 0 394 395config PPC_ADV_DEBUG_DAC_RANGE 396 bool 397 depends on PPC_ADV_DEBUG_REGS && 44x 398 default y 399 400config PPC_DAWR 401 bool 402 403config PGTABLE_LEVELS 404 int 405 default 2 if !PPC64 406 default 4 407 408source "arch/powerpc/sysdev/Kconfig" 409source "arch/powerpc/platforms/Kconfig" 410 411menu "Kernel options" 412 413config HIGHMEM 414 bool "High memory support" 415 depends on PPC32 416 select KMAP_LOCAL 417 418source "kernel/Kconfig.hz" 419 420config MATH_EMULATION 421 bool "Math emulation" 422 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT 423 select PPC_FPU_REGS 424 help 425 Some PowerPC chips designed for embedded applications do not have 426 a floating-point unit and therefore do not implement the 427 floating-point instructions in the PowerPC instruction set. If you 428 say Y here, the kernel will include code to emulate a floating-point 429 unit, which will allow programs that use floating-point 430 instructions to run. 431 432 This is also useful to emulate missing (optional) instructions 433 such as fsqrt on cores that do have an FPU but do not implement 434 them (such as Freescale BookE). 435 436choice 437 prompt "Math emulation options" 438 default MATH_EMULATION_FULL 439 depends on MATH_EMULATION 440 441config MATH_EMULATION_FULL 442 bool "Emulate all the floating point instructions" 443 help 444 Select this option will enable the kernel to support to emulate 445 all the floating point instructions. If your SoC doesn't have 446 a FPU, you should select this. 447 448config MATH_EMULATION_HW_UNIMPLEMENTED 449 bool "Just emulate the FPU unimplemented instructions" 450 help 451 Select this if you know there does have a hardware FPU on your 452 SoC, but some floating point instructions are not implemented by that. 453 454endchoice 455 456config PPC_TRANSACTIONAL_MEM 457 bool "Transactional Memory support for POWERPC" 458 depends on PPC_BOOK3S_64 459 depends on SMP 460 select ALTIVEC 461 select VSX 462 help 463 Support user-mode Transactional Memory on POWERPC. 464 465config PPC_UV 466 bool "Ultravisor support" 467 depends on KVM_BOOK3S_HV_POSSIBLE 468 depends on DEVICE_PRIVATE 469 default n 470 help 471 This option paravirtualizes the kernel to run in POWER platforms that 472 supports the Protected Execution Facility (PEF). On such platforms, 473 the ultravisor firmware runs at a privilege level above the 474 hypervisor. 475 476 If unsure, say "N". 477 478config LD_HEAD_STUB_CATCH 479 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT 480 depends on PPC64 481 help 482 Very large kernels can cause linker branch stubs to be generated by 483 code in head_64.S, which moves the head text sections out of their 484 specified location. This option can work around the problem. 485 486 If unsure, say "N". 487 488config MPROFILE_KERNEL 489 depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER 490 def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) 491 492config HOTPLUG_CPU 493 bool "Support for enabling/disabling CPUs" 494 depends on SMP && (PPC_PSERIES || \ 495 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 496 help 497 Say Y here to be able to disable and re-enable individual 498 CPUs at runtime on SMP machines. 499 500 Say N if you are unsure. 501 502config PPC_QUEUED_SPINLOCKS 503 bool "Queued spinlocks" if EXPERT 504 depends on SMP 505 default PPC_BOOK3S_64 506 help 507 Say Y here to use queued spinlocks which give better scalability and 508 fairness on large SMP and NUMA systems without harming single threaded 509 performance. 510 511config ARCH_CPU_PROBE_RELEASE 512 def_bool y 513 depends on HOTPLUG_CPU 514 515config PPC64_SUPPORTS_MEMORY_FAILURE 516 bool "Add support for memory hwpoison" 517 depends on PPC_BOOK3S_64 518 default "y" if PPC_POWERNV 519 select ARCH_SUPPORTS_MEMORY_FAILURE 520 521config KEXEC 522 bool "kexec system call" 523 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E 524 select KEXEC_CORE 525 help 526 kexec is a system call that implements the ability to shutdown your 527 current kernel, and to start another kernel. It is like a reboot 528 but it is independent of the system firmware. And like a reboot 529 you can start any kernel with it, not just Linux. 530 531 The name comes from the similarity to the exec system call. 532 533 It is an ongoing process to be certain the hardware in a machine 534 is properly shutdown, so do not be surprised if this code does not 535 initially work for you. As of this writing the exact hardware 536 interface is strongly in flux, so no good recommendation can be 537 made. 538 539config KEXEC_FILE 540 bool "kexec file based system call" 541 select KEXEC_CORE 542 select HAVE_IMA_KEXEC if IMA 543 select BUILD_BIN2C 544 select KEXEC_ELF 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 ARCH_HAS_KEXEC_PURGATORY 555 def_bool KEXEC_FILE 556 557config RELOCATABLE 558 bool "Build a relocatable kernel" 559 depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) 560 select NONSTATIC_KERNEL 561 select MODULE_REL_CRCS if MODVERSIONS 562 help 563 This builds a kernel image that is capable of running at the 564 location the kernel is loaded at. For ppc32, there is no any 565 alignment restrictions, and this feature is a superset of 566 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 567 16k-aligned base address. The kernel is linked as a 568 position-independent executable (PIE) and contains dynamic relocations 569 which are processed early in the bootup process. 570 571 One use is for the kexec on panic case where the recovery kernel 572 must live at a different physical address than the primary 573 kernel. 574 575 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 576 it has been loaded at and the compile time physical addresses 577 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 578 setting can still be useful to bootwrappers that need to know the 579 load address of the kernel (eg. u-boot/mkimage). 580 581config RANDOMIZE_BASE 582 bool "Randomize the address of the kernel image" 583 depends on (FSL_BOOKE && FLATMEM && PPC32) 584 depends on RELOCATABLE 585 help 586 Randomizes the virtual address at which the kernel image is 587 loaded, as a security feature that deters exploit attempts 588 relying on knowledge of the location of kernel internals. 589 590 If unsure, say Y. 591 592config RELOCATABLE_TEST 593 bool "Test relocatable kernel" 594 depends on (PPC64 && RELOCATABLE) 595 help 596 This runs the relocatable kernel at the address it was initially 597 loaded at, which tends to be non-zero and therefore test the 598 relocation code. 599 600config CRASH_DUMP 601 bool "Build a dump capture kernel" 602 depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) 603 select RELOCATABLE if PPC64 || 44x || FSL_BOOKE 604 help 605 Build a kernel suitable for use as a dump capture kernel. 606 The same kernel binary can be used as production kernel and dump 607 capture kernel. 608 609config FA_DUMP 610 bool "Firmware-assisted dump" 611 depends on PPC64 && (PPC_RTAS || PPC_POWERNV) 612 select CRASH_CORE 613 select CRASH_DUMP 614 help 615 A robust mechanism to get reliable kernel crash dump with 616 assistance from firmware. This approach does not use kexec, 617 instead firmware assists in booting the capture kernel 618 while preserving memory contents. Firmware-assisted dump 619 is meant to be a kdump replacement offering robustness and 620 speed not possible without system firmware assistance. 621 622 If unsure, say "y". Only special kernels like petitboot may 623 need to say "N" here. 624 625config PRESERVE_FA_DUMP 626 bool "Preserve Firmware-assisted dump" 627 depends on PPC64 && PPC_POWERNV && !FA_DUMP 628 help 629 On a kernel with FA_DUMP disabled, this option helps to preserve 630 crash data from a previously crash'ed kernel. Useful when the next 631 memory preserving kernel boot would process this crash data. 632 Petitboot kernel is the typical usecase for this option. 633 634config OPAL_CORE 635 bool "Export OPAL memory as /sys/firmware/opal/core" 636 depends on PPC64 && PPC_POWERNV 637 help 638 This option uses the MPIPL support in firmware to provide an 639 ELF core of OPAL memory after a crash. The ELF core is exported 640 as /sys/firmware/opal/core file which is helpful in debugging 641 OPAL crashes using GDB. 642 643config IRQ_ALL_CPUS 644 bool "Distribute interrupts on all CPUs by default" 645 depends on SMP 646 help 647 This option gives the kernel permission to distribute IRQs across 648 multiple CPUs. Saying N here will route all IRQs to the first 649 CPU. Generally saying Y is safe, although some problems have been 650 reported with SMP Power Macintoshes with this option enabled. 651 652config NUMA 653 bool "NUMA Memory Allocation and Scheduler Support" 654 depends on PPC64 && SMP 655 default y if PPC_PSERIES || PPC_POWERNV 656 select USE_PERCPU_NUMA_NODE_ID 657 help 658 Enable NUMA (Non-Uniform Memory Access) support. 659 660 The kernel will try to allocate memory used by a CPU on the 661 local memory controller of the CPU and add some more 662 NUMA awareness to the kernel. 663 664config NODES_SHIFT 665 int 666 default "8" if PPC64 667 default "4" 668 depends on NUMA 669 670config HAVE_MEMORYLESS_NODES 671 def_bool y 672 depends on NUMA 673 674config ARCH_SELECT_MEMORY_MODEL 675 def_bool y 676 depends on PPC64 677 678config ARCH_FLATMEM_ENABLE 679 def_bool y 680 depends on (PPC64 && !NUMA) || PPC32 681 682config ARCH_SPARSEMEM_ENABLE 683 def_bool y 684 depends on PPC64 685 select SPARSEMEM_VMEMMAP_ENABLE 686 687config ARCH_SPARSEMEM_DEFAULT 688 def_bool y 689 depends on PPC_BOOK3S_64 690 691config ILLEGAL_POINTER_VALUE 692 hex 693 # This is roughly half way between the top of user space and the bottom 694 # of kernel space, which seems about as good as we can get. 695 default 0x5deadbeef0000000 if PPC64 696 default 0 697 698config ARCH_MEMORY_PROBE 699 def_bool y 700 depends on MEMORY_HOTPLUG 701 702choice 703 prompt "Page size" 704 default PPC_64K_PAGES if PPC_BOOK3S_64 705 default PPC_4K_PAGES 706 help 707 Select the kernel logical page size. Increasing the page size 708 will reduce software overhead at each page boundary, allow 709 hardware prefetch mechanisms to be more effective, and allow 710 larger dma transfers increasing IO efficiency and reducing 711 overhead. However the utilization of memory will increase. 712 For example, each cached file will using a multiple of the 713 page size to hold its contents and the difference between the 714 end of file and the end of page is wasted. 715 716 Some dedicated systems, such as software raid serving with 717 accelerated calculations, have shown significant increases. 718 719 If you configure a 64 bit kernel for 64k pages but the 720 processor does not support them, then the kernel will simulate 721 them with 4k pages, loading them on demand, but with the 722 reduced software overhead and larger internal fragmentation. 723 For the 32 bit kernel, a large page option will not be offered 724 unless it is supported by the configured processor. 725 726 If unsure, choose 4K_PAGES. 727 728config PPC_4K_PAGES 729 bool "4k page size" 730 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 731 732config PPC_16K_PAGES 733 bool "16k page size" 734 depends on 44x || PPC_8xx 735 736config PPC_64K_PAGES 737 bool "64k page size" 738 depends on 44x || PPC_BOOK3S_64 739 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 740 741config PPC_256K_PAGES 742 bool "256k page size (Requires non-standard binutils settings)" 743 depends on 44x && !PPC_47x 744 help 745 Make the page size 256k. 746 747 The kernel will only be able to run applications that have been 748 compiled with '-zmax-page-size' set to 256K (the default is 64K) using 749 binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE 750 definition from 0x10000 to 0x40000 in older versions. 751 752endchoice 753 754config PPC_PAGE_SHIFT 755 int 756 default 18 if PPC_256K_PAGES 757 default 16 if PPC_64K_PAGES 758 default 14 if PPC_16K_PAGES 759 default 12 760 761config THREAD_SHIFT 762 int "Thread shift" if EXPERT 763 range 13 15 764 default "15" if PPC_256K_PAGES 765 default "14" if PPC64 766 default "14" if KASAN 767 default "13" 768 help 769 Used to define the stack size. The default is almost always what you 770 want. Only change this if you know what you are doing. 771 772config DATA_SHIFT_BOOL 773 bool "Set custom data alignment" 774 depends on ADVANCED_OPTIONS 775 depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE 776 depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \ 777 FSL_BOOKE 778 help 779 This option allows you to set the kernel data alignment. When 780 RAM is mapped by blocks, the alignment needs to fit the size and 781 number of possible blocks. The default should be OK for most configs. 782 783 Say N here unless you know what you are doing. 784 785config DATA_SHIFT 786 int "Data shift" if DATA_SHIFT_BOOL 787 default 24 if STRICT_KERNEL_RWX && PPC64 788 range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 789 range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 790 range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_FSL_BOOKE 791 default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 792 default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 793 default 23 if STRICT_KERNEL_RWX && PPC_8xx 794 default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA 795 default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 796 default 24 if STRICT_KERNEL_RWX && FSL_BOOKE 797 default PPC_PAGE_SHIFT 798 help 799 On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. 800 Smaller is the alignment, greater is the number of necessary DBATs. 801 802 On 8xx, large pages (512kb or 8M) are used to map kernel linear 803 memory. Aligning to 8M reduces TLB misses as only 8M pages are used 804 in that case. If PIN_TLB is selected, it must be aligned to 8M as 805 8M pages will be pinned. 806 807config FORCE_MAX_ZONEORDER 808 int "Maximum zone order" 809 range 8 9 if PPC64 && PPC_64K_PAGES 810 default "9" if PPC64 && PPC_64K_PAGES 811 range 13 13 if PPC64 && !PPC_64K_PAGES 812 default "13" if PPC64 && !PPC_64K_PAGES 813 range 9 64 if PPC32 && PPC_16K_PAGES 814 default "9" if PPC32 && PPC_16K_PAGES 815 range 7 64 if PPC32 && PPC_64K_PAGES 816 default "7" if PPC32 && PPC_64K_PAGES 817 range 5 64 if PPC32 && PPC_256K_PAGES 818 default "5" if PPC32 && PPC_256K_PAGES 819 range 11 64 820 default "11" 821 help 822 The kernel memory allocator divides physically contiguous memory 823 blocks into "zones", where each zone is a power of two number of 824 pages. This option selects the largest power of two that the kernel 825 keeps in the memory allocator. If you need to allocate very large 826 blocks of physically contiguous memory, then you may need to 827 increase this value. 828 829 This config option is actually maximum order plus one. For example, 830 a value of 11 means that the largest free memory block is 2^10 pages. 831 832 The page size is not necessarily 4KB. For example, on 64-bit 833 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 834 this in mind when choosing a value for this option. 835 836config PPC_SUBPAGE_PROT 837 bool "Support setting protections for 4k subpages (subpage_prot syscall)" 838 default n 839 depends on PPC_BOOK3S_64 && PPC_64K_PAGES 840 help 841 This option adds support for system call to allow user programs 842 to set access permissions (read/write, readonly, or no access) 843 on the 4k subpages of each 64k page. 844 845 If unsure, say N here. 846 847config PPC_PROT_SAO_LPAR 848 bool "Support PROT_SAO mappings in LPARs" 849 depends on PPC_BOOK3S_64 850 help 851 This option adds support for PROT_SAO mappings from userspace 852 inside LPARs on supported CPUs. 853 854 This may cause issues when performing guest migration from 855 a CPU that supports SAO to one that does not. 856 857 If unsure, say N here. 858 859config PPC_COPRO_BASE 860 bool 861 862config SCHED_SMT 863 bool "SMT (Hyperthreading) scheduler support" 864 depends on PPC64 && SMP 865 help 866 SMT scheduler support improves the CPU scheduler's decision making 867 when dealing with POWER5 cpus at a cost of slightly increased 868 overhead in some places. If unsure say N here. 869 870config PPC_DENORMALISATION 871 bool "PowerPC denormalisation exception handling" 872 depends on PPC_BOOK3S_64 873 default "y" if PPC_POWERNV 874 help 875 Add support for handling denormalisation of single precision 876 values. Useful for bare metal only. If unsure say Y here. 877 878config CMDLINE 879 string "Initial kernel command string" 880 default "" 881 help 882 On some platforms, there is currently no way for the boot loader to 883 pass arguments to the kernel. For these platforms, you can supply 884 some command-line options at build time by entering them here. In 885 most cases you will need to specify the root device here. 886 887choice 888 prompt "Kernel command line type" if CMDLINE != "" 889 default CMDLINE_FROM_BOOTLOADER 890 891config CMDLINE_FROM_BOOTLOADER 892 bool "Use bootloader kernel arguments if available" 893 help 894 Uses the command-line options passed by the boot loader. If 895 the boot loader doesn't provide any, the default kernel command 896 string provided in CMDLINE will be used. 897 898config CMDLINE_EXTEND 899 bool "Extend bootloader kernel arguments" 900 help 901 The command-line arguments provided by the boot loader will be 902 appended to the default kernel command string. 903 904config CMDLINE_FORCE 905 bool "Always use the default kernel command string" 906 help 907 Always use the default kernel command string, even if the boot 908 loader passes other arguments to the kernel. 909 This is useful if you cannot or don't want to change the 910 command-line options your boot loader passes to the kernel. 911 912endchoice 913 914config EXTRA_TARGETS 915 string "Additional default image types" 916 help 917 List additional targets to be built by the bootwrapper here (separated 918 by spaces). This is useful for targets that depend of device tree 919 files in the .dts directory. 920 921 Targets in this list will be build as part of the default build 922 target, or when the user does a 'make zImage' or a 923 'make zImage.initrd'. 924 925 If unsure, leave blank 926 927config ARCH_WANTS_FREEZER_CONTROL 928 def_bool y 929 depends on ADB_PMU 930 931source "kernel/power/Kconfig" 932 933config PPC_MEM_KEYS 934 prompt "PowerPC Memory Protection Keys" 935 def_bool y 936 depends on PPC_BOOK3S_64 937 select ARCH_USES_HIGH_VMA_FLAGS 938 select ARCH_HAS_PKEYS 939 help 940 Memory Protection Keys provides a mechanism for enforcing 941 page-based protections, but without requiring modification of the 942 page tables when an application changes protection domains. 943 944 For details, see Documentation/core-api/protection-keys.rst 945 946 If unsure, say y. 947 948config PPC_SECURE_BOOT 949 prompt "Enable secure boot support" 950 bool 951 depends on PPC_POWERNV || PPC_PSERIES 952 depends on IMA_ARCH_POLICY 953 imply IMA_SECURE_AND_OR_TRUSTED_BOOT 954 help 955 Systems with firmware secure boot enabled need to define security 956 policies to extend secure boot to the OS. This config allows a user 957 to enable OS secure boot on systems that have firmware support for 958 it. If in doubt say N. 959 960config PPC_SECVAR_SYSFS 961 bool "Enable sysfs interface for POWER secure variables" 962 default y 963 depends on PPC_SECURE_BOOT 964 depends on SYSFS 965 help 966 POWER secure variables are managed and controlled by firmware. 967 These variables are exposed to userspace via sysfs to enable 968 read/write operations on these variables. Say Y if you have 969 secure boot enabled and want to expose variables to userspace. 970 971config PPC_RTAS_FILTER 972 bool "Enable filtering of RTAS syscalls" 973 default y 974 depends on PPC_RTAS 975 help 976 The RTAS syscall API has security issues that could be used to 977 compromise system integrity. This option enforces restrictions on the 978 RTAS calls and arguments passed by userspace programs to mitigate 979 these issues. 980 981 Say Y unless you know what you are doing and the filter is causing 982 problems for you. 983 984endmenu 985 986config ISA_DMA_API 987 bool 988 default PCI 989 990menu "Bus options" 991 992config ISA 993 bool "Support for ISA-bus hardware" 994 depends on PPC_CHRP 995 select PPC_I8259 996 help 997 Find out whether you have ISA slots on your motherboard. ISA is the 998 name of a bus system, i.e. the way the CPU talks to the other stuff 999 inside your box. If you have an Apple machine, say N here; if you 1000 have an IBM RS/6000 or pSeries machine, say Y. If you have an 1001 embedded board, consult your board documentation. 1002 1003config GENERIC_ISA_DMA 1004 bool 1005 depends on ISA_DMA_API 1006 default y 1007 1008config PPC_INDIRECT_PCI 1009 bool 1010 depends on PCI 1011 default y if 40x || 44x 1012 1013config SBUS 1014 bool 1015 1016config FSL_SOC 1017 bool 1018 1019config FSL_PCI 1020 bool 1021 select ARCH_HAS_DMA_SET_MASK 1022 select PPC_INDIRECT_PCI 1023 select PCI_QUIRKS 1024 1025config FSL_PMC 1026 bool 1027 default y 1028 depends on SUSPEND && (PPC_85xx || PPC_86xx) 1029 help 1030 Freescale MPC85xx/MPC86xx power management controller support 1031 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 1032 1033config PPC4xx_CPM 1034 bool 1035 default y 1036 depends on SUSPEND && (44x || 40x) 1037 help 1038 PPC4xx Clock Power Management (CPM) support (suspend/resume). 1039 It also enables support for two different idle states (idle-wait 1040 and idle-doze). 1041 1042config 4xx_SOC 1043 bool 1044 1045config FSL_LBC 1046 bool "Freescale Local Bus support" 1047 help 1048 Enables reporting of errors from the Freescale local bus 1049 controller. Also contains some common code used by 1050 drivers for specific local bus peripherals. 1051 1052config FSL_GTM 1053 bool 1054 depends on PPC_83xx || QUICC_ENGINE || CPM2 1055 help 1056 Freescale General-purpose Timers support 1057 1058config PCI_8260 1059 bool 1060 depends on PCI && 8260 1061 select PPC_INDIRECT_PCI 1062 default y 1063 1064config FSL_RIO 1065 bool "Freescale Embedded SRIO Controller support" 1066 depends on RAPIDIO = y && HAVE_RAPIDIO 1067 default "n" 1068 help 1069 Include support for RapidIO controller on Freescale embedded 1070 processors (MPC8548, MPC8641, etc). 1071 1072endmenu 1073 1074config NONSTATIC_KERNEL 1075 bool 1076 1077menu "Advanced setup" 1078 depends on PPC32 1079 1080config ADVANCED_OPTIONS 1081 bool "Prompt for advanced kernel configuration options" 1082 help 1083 This option will enable prompting for a variety of advanced kernel 1084 configuration options. These options can cause the kernel to not 1085 work if they are set incorrectly, but can be used to optimize certain 1086 aspects of kernel memory management. 1087 1088 Unless you know what you are doing, say N here. 1089 1090comment "Default settings for advanced configuration options are used" 1091 depends on !ADVANCED_OPTIONS 1092 1093config LOWMEM_SIZE_BOOL 1094 bool "Set maximum low memory" 1095 depends on ADVANCED_OPTIONS 1096 help 1097 This option allows you to set the maximum amount of memory which 1098 will be used as "low memory", that is, memory which the kernel can 1099 access directly, without having to set up a kernel virtual mapping. 1100 This can be useful in optimizing the layout of kernel virtual 1101 memory. 1102 1103 Say N here unless you know what you are doing. 1104 1105config LOWMEM_SIZE 1106 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1107 default "0x30000000" 1108 1109config LOWMEM_CAM_NUM_BOOL 1110 bool "Set number of CAMs to use to map low memory" 1111 depends on ADVANCED_OPTIONS && FSL_BOOKE 1112 help 1113 This option allows you to set the maximum number of CAM slots that 1114 will be used to map low memory. There are a limited number of slots 1115 available and even more limited number that will fit in the L1 MMU. 1116 However, using more entries will allow mapping more low memory. This 1117 can be useful in optimizing the layout of kernel virtual memory. 1118 1119 Say N here unless you know what you are doing. 1120 1121config LOWMEM_CAM_NUM 1122 depends on FSL_BOOKE 1123 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1124 default 3 if !STRICT_KERNEL_RWX 1125 default 9 if DATA_SHIFT >= 24 1126 default 12 if DATA_SHIFT >= 22 1127 default 15 1128 1129config DYNAMIC_MEMSTART 1130 bool "Enable page aligned dynamic load address for kernel" 1131 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) 1132 select NONSTATIC_KERNEL 1133 help 1134 This option enables the kernel to be loaded at any page aligned 1135 physical address. The kernel creates a mapping from KERNELBASE to 1136 the address where the kernel is loaded. The page size here implies 1137 the TLB page size of the mapping for kernel on the particular platform. 1138 Please refer to the init code for finding the TLB page size. 1139 1140 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1141 kernel image, where the only restriction is the page aligned kernel 1142 load address. When this option is enabled, the compile time physical 1143 address CONFIG_PHYSICAL_START is ignored. 1144 1145 This option is overridden by CONFIG_RELOCATABLE 1146 1147config PAGE_OFFSET_BOOL 1148 bool "Set custom page offset address" 1149 depends on ADVANCED_OPTIONS 1150 help 1151 This option allows you to set the kernel virtual address at which 1152 the kernel will map low memory. This can be useful in optimizing 1153 the virtual memory layout of the system. 1154 1155 Say N here unless you know what you are doing. 1156 1157config PAGE_OFFSET 1158 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1159 default "0xc0000000" 1160 1161config KERNEL_START_BOOL 1162 bool "Set custom kernel base address" 1163 depends on ADVANCED_OPTIONS 1164 help 1165 This option allows you to set the kernel virtual address at which 1166 the kernel will be loaded. Normally this should match PAGE_OFFSET 1167 however there are times (like kdump) that one might not want them 1168 to be the same. 1169 1170 Say N here unless you know what you are doing. 1171 1172config KERNEL_START 1173 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1174 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1175 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1176 default "0xc0000000" 1177 1178config PHYSICAL_START_BOOL 1179 bool "Set physical address where the kernel is loaded" 1180 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE 1181 help 1182 This gives the physical address where the kernel is loaded. 1183 1184 Say N here unless you know what you are doing. 1185 1186config PHYSICAL_START 1187 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1188 default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL 1189 default "0x00000000" 1190 1191config PHYSICAL_ALIGN 1192 hex 1193 default "0x04000000" if FSL_BOOKE 1194 help 1195 This value puts the alignment restrictions on physical address 1196 where kernel is loaded and run from. Kernel is compiled for an 1197 address which meets above alignment restriction. 1198 1199config TASK_SIZE_BOOL 1200 bool "Set custom user task size" 1201 depends on ADVANCED_OPTIONS 1202 help 1203 This option allows you to set the amount of virtual address space 1204 allocated to user tasks. This can be useful in optimizing the 1205 virtual memory layout of the system. 1206 1207 Say N here unless you know what you are doing. 1208 1209config TASK_SIZE 1210 hex "Size of user task space" if TASK_SIZE_BOOL 1211 default "0x80000000" if PPC_8xx 1212 default "0xb0000000" if PPC_BOOK3S_32 1213 default "0xc0000000" 1214endmenu 1215 1216if PPC64 1217# This value must have zeroes in the bottom 60 bits otherwise lots will break 1218config PAGE_OFFSET 1219 hex 1220 default "0xc000000000000000" 1221config KERNEL_START 1222 hex 1223 default "0xc000000000000000" 1224config PHYSICAL_START 1225 hex 1226 default "0x00000000" 1227endif 1228 1229config ARCH_RANDOM 1230 def_bool n 1231 1232config PPC_LIB_RHEAP 1233 bool 1234 1235source "arch/powerpc/kvm/Kconfig" 1236 1237source "kernel/livepatch/Kconfig" 1238