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 LIVEPATCH_64 13 def_bool PPC64 14 depends on LIVEPATCH 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 NR_IRQS 63 int "Number of virtual interrupt numbers" 64 range 32 1048576 65 default "512" 66 help 67 This defines the number of virtual interrupt numbers the kernel 68 can manage. Virtual interrupt numbers are what you see in 69 /proc/interrupts. If you configure your system to have too few, 70 drivers will fail to load or worse - handle with care. 71 72config NMI_IPI 73 bool 74 depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) 75 default y 76 77config PPC_WATCHDOG 78 bool 79 depends on HARDLOCKUP_DETECTOR 80 depends on HAVE_HARDLOCKUP_DETECTOR_ARCH 81 default y 82 help 83 This is a placeholder when the powerpc hardlockup detector 84 watchdog is selected (arch/powerpc/kernel/watchdog.c). It is 85 selected via the generic lockup detector menu which is why we 86 have no standalone config option for it here. 87 88config STACKTRACE_SUPPORT 89 bool 90 default y 91 92config LOCKDEP_SUPPORT 93 bool 94 default y 95 96config GENERIC_LOCKBREAK 97 bool 98 default y 99 depends on SMP && PREEMPTION 100 101config GENERIC_HWEIGHT 102 bool 103 default y 104 105config PPC 106 bool 107 default y 108 # 109 # Please keep this list sorted alphabetically. 110 # 111 select ARCH_32BIT_OFF_T if PPC32 112 select ARCH_DISABLE_KASAN_INLINE if PPC_RADIX_MMU 113 select ARCH_ENABLE_MEMORY_HOTPLUG 114 select ARCH_ENABLE_MEMORY_HOTREMOVE 115 select ARCH_HAS_COPY_MC if PPC64 116 select ARCH_HAS_CURRENT_STACK_POINTER 117 select ARCH_HAS_DEBUG_VIRTUAL 118 select ARCH_HAS_DEBUG_VM_PGTABLE 119 select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX 120 select ARCH_HAS_DEVMEM_IS_ALLOWED 121 select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES 122 select ARCH_HAS_FORTIFY_SOURCE 123 select ARCH_HAS_GCOV_PROFILE_ALL 124 select ARCH_HAS_HUGEPD if HUGETLB_PAGE 125 select ARCH_HAS_KCOV 126 select ARCH_HAS_MEMBARRIER_CALLBACKS 127 select ARCH_HAS_MEMBARRIER_SYNC_CORE 128 select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU 129 select ARCH_HAS_MMIOWB if PPC64 130 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE 131 select ARCH_HAS_PHYS_TO_DMA 132 select ARCH_HAS_PMEM_API 133 select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 134 select ARCH_HAS_PTE_SPECIAL 135 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 136 select ARCH_HAS_SET_MEMORY 137 select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION 138 select ARCH_HAS_STRICT_KERNEL_RWX if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE 139 select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX 140 select ARCH_HAS_SYSCALL_WRAPPER if !SPU_BASE && !COMPAT 141 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 142 select ARCH_HAS_UACCESS_FLUSHCACHE 143 select ARCH_HAS_UBSAN_SANITIZE_ALL 144 select ARCH_HAVE_NMI_SAFE_CMPXCHG 145 select ARCH_KEEP_MEMBLOCK 146 select ARCH_MIGHT_HAVE_PC_PARPORT 147 select ARCH_MIGHT_HAVE_PC_SERIO 148 select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX 149 select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT 150 select ARCH_STACKWALK 151 select ARCH_SUPPORTS_ATOMIC_RMW 152 select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x 153 select ARCH_USE_BUILTIN_BSWAP 154 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 155 select ARCH_USE_MEMTEST 156 select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS 157 select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS 158 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT 159 select ARCH_WANT_IPC_PARSE_VERSION 160 select ARCH_WANT_IRQS_OFF_ACTIVATE_MM 161 select ARCH_WANT_LD_ORPHAN_WARN 162 select ARCH_WANTS_MODULES_DATA_IN_VMALLOC if PPC_BOOK3S_32 || PPC_8xx 163 select ARCH_WANTS_NO_INSTR 164 select ARCH_WEAK_RELEASE_ACQUIRE 165 select BINFMT_ELF 166 select BUILDTIME_TABLE_SORT 167 select CLONE_BACKWARDS 168 select CPUMASK_OFFSTACK if NR_CPUS >= 8192 169 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 170 select DMA_OPS_BYPASS if PPC64 171 select DMA_OPS if PPC64 172 select DYNAMIC_FTRACE if FUNCTION_TRACER 173 select EDAC_ATOMIC_SCRUB 174 select EDAC_SUPPORT 175 select GENERIC_ATOMIC64 if PPC32 176 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 177 select GENERIC_CMOS_UPDATE 178 select GENERIC_CPU_AUTOPROBE 179 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC 180 select GENERIC_EARLY_IOREMAP 181 select GENERIC_GETTIMEOFDAY 182 select GENERIC_IRQ_SHOW 183 select GENERIC_IRQ_SHOW_LEVEL 184 select GENERIC_PCI_IOMAP if PCI 185 select GENERIC_PTDUMP 186 select GENERIC_SMP_IDLE_THREAD 187 select GENERIC_TIME_VSYSCALL 188 select GENERIC_VDSO_TIME_NS 189 select HAVE_ARCH_AUDITSYSCALL 190 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP 191 select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx 192 select HAVE_ARCH_JUMP_LABEL 193 select HAVE_ARCH_JUMP_LABEL_RELATIVE 194 select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 195 select HAVE_ARCH_KASAN if PPC_RADIX_MMU 196 select HAVE_ARCH_KASAN if PPC_BOOK3E_64 197 select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN 198 select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC 199 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET 200 select HAVE_ARCH_KGDB 201 select HAVE_ARCH_MMAP_RND_BITS 202 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT 203 select HAVE_ARCH_NVRAM_OPS 204 select HAVE_ARCH_SECCOMP_FILTER 205 select HAVE_ARCH_TRACEHOOK 206 select HAVE_ASM_MODVERSIONS 207 select HAVE_CONTEXT_TRACKING_USER if PPC64 208 select HAVE_C_RECORDMCOUNT 209 select HAVE_DEBUG_KMEMLEAK 210 select HAVE_DEBUG_STACKOVERFLOW 211 select HAVE_DYNAMIC_FTRACE 212 select HAVE_DYNAMIC_FTRACE_WITH_ARGS if MPROFILE_KERNEL || PPC32 213 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL || PPC32 214 select HAVE_EBPF_JIT 215 select HAVE_EFFICIENT_UNALIGNED_ACCESS 216 select HAVE_FAST_GUP 217 select HAVE_FTRACE_MCOUNT_RECORD 218 select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1 219 select HAVE_FUNCTION_ERROR_INJECTION 220 select HAVE_FUNCTION_GRAPH_TRACER 221 select HAVE_FUNCTION_TRACER 222 select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC 223 select HAVE_GENERIC_VDSO 224 select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP 225 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH 226 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 227 select HAVE_IOREMAP_PROT 228 select HAVE_IRQ_TIME_ACCOUNTING 229 select HAVE_KERNEL_GZIP 230 select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE 231 select HAVE_KERNEL_LZO if DEFAULT_UIMAGE 232 select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x 233 select HAVE_KPROBES 234 select HAVE_KPROBES_ON_FTRACE 235 select HAVE_KRETPROBES 236 select HAVE_LD_DEAD_CODE_DATA_ELIMINATION 237 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 238 select HAVE_MOD_ARCH_SPECIFIC 239 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) 240 select HAVE_OPTPROBES 241 select HAVE_PERF_EVENTS 242 select HAVE_PERF_EVENTS_NMI if PPC64 243 select HAVE_PERF_REGS 244 select HAVE_PERF_USER_STACK_DUMP 245 select HAVE_REGS_AND_STACK_ACCESS_API 246 select HAVE_RELIABLE_STACKTRACE 247 select HAVE_RSEQ 248 select HAVE_SETUP_PER_CPU_AREA if PPC64 249 select HAVE_SOFTIRQ_ON_OWN_STACK 250 select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) 251 select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) 252 select HAVE_STATIC_CALL if PPC32 253 select HAVE_SYSCALL_TRACEPOINTS 254 select HAVE_VIRT_CPU_ACCOUNTING 255 select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE 256 select IOMMU_HELPER if PPC64 257 select IRQ_DOMAIN 258 select IRQ_FORCED_THREADING 259 select KASAN_VMALLOC if KASAN && MODULES 260 select MMU_GATHER_PAGE_SIZE 261 select MMU_GATHER_RCU_TABLE_FREE 262 select MMU_GATHER_MERGE_VMAS 263 select MODULES_USE_ELF_RELA 264 select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE 265 select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64 266 select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64 267 select NEED_SG_DMA_LENGTH 268 select OF 269 select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE 270 select OF_EARLY_FLATTREE 271 select OLD_SIGACTION if PPC32 272 select OLD_SIGSUSPEND 273 select PCI_DOMAINS if PCI 274 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 275 select PCI_SYSCALL if PCI 276 select PPC_DAWR if PPC64 277 select RTC_LIB 278 select SPARSE_IRQ 279 select STRICT_KERNEL_RWX if STRICT_MODULE_RWX 280 select SYSCTL_EXCEPTION_TRACE 281 select THREAD_INFO_IN_TASK 282 select TRACE_IRQFLAGS_SUPPORT 283 # 284 # Please keep this list sorted alphabetically. 285 # 286 287config PPC_LONG_DOUBLE_128 288 depends on PPC64 289 def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1) 290 291config PPC_BARRIER_NOSPEC 292 bool 293 default y 294 depends on PPC_BOOK3S_64 || PPC_E500 295 296config EARLY_PRINTK 297 bool 298 default y 299 300config PANIC_TIMEOUT 301 int 302 default 180 303 304config COMPAT 305 bool "Enable support for 32bit binaries" 306 depends on PPC64 307 depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 308 default y if !CPU_LITTLE_ENDIAN 309 select ARCH_WANT_OLD_COMPAT_IPC 310 select COMPAT_OLD_SIGACTION 311 312config SCHED_OMIT_FRAME_POINTER 313 bool 314 default y 315 316config ARCH_MAY_HAVE_PC_FDC 317 bool 318 default PCI 319 320config PPC_UDBG_16550 321 bool 322 323config GENERIC_TBSYNC 324 bool 325 default y if PPC32 && SMP 326 327config AUDIT_ARCH 328 bool 329 default y 330 331config GENERIC_BUG 332 bool 333 default y 334 depends on BUG 335 336config GENERIC_BUG_RELATIVE_POINTERS 337 def_bool y 338 depends on GENERIC_BUG 339 340config SYS_SUPPORTS_APM_EMULATION 341 default y if PMAC_APM_EMU 342 bool 343 344config EPAPR_BOOT 345 bool 346 help 347 Used to allow a board to specify it wants an ePAPR compliant wrapper. 348 349config DEFAULT_UIMAGE 350 bool 351 help 352 Used to allow a board to specify it wants a uImage built by default 353 354config ARCH_HIBERNATION_POSSIBLE 355 bool 356 default y 357 358config ARCH_SUSPEND_POSSIBLE 359 def_bool y 360 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 361 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 362 || 44x || 40x 363 364config ARCH_SUSPEND_NONZERO_CPU 365 def_bool y 366 depends on PPC_POWERNV || PPC_PSERIES 367 368config ARCH_HAS_ADD_PAGES 369 def_bool y 370 depends on ARCH_ENABLE_MEMORY_HOTPLUG 371 372config PPC_DCR_NATIVE 373 bool 374 375config PPC_DCR_MMIO 376 bool 377 378config PPC_DCR 379 bool 380 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 381 default y 382 383config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT 384 depends on PPC32 385 depends on !PPC_PMAC && !PPC_CHRP 386 bool "Assign PCI bus numbers from zero individually for each PCI domain" 387 help 388 By default on PPC32 were PCI bus numbers unique across all PCI domains. 389 So system could have only 256 PCI buses independently of available 390 PCI domains. When this option is enabled then PCI bus numbers are 391 PCI domain dependent and each PCI controller on own domain can have 392 256 PCI buses, like it is on other Linux architectures. 393 394config PPC_OF_PLATFORM_PCI 395 bool 396 depends on PCI 397 depends on PPC64 # not supported on 32 bits yet 398 399config ARCH_SUPPORTS_UPROBES 400 def_bool y 401 402config PPC_ADV_DEBUG_REGS 403 bool 404 depends on 40x || BOOKE 405 default y 406 407config PPC_ADV_DEBUG_IACS 408 int 409 depends on PPC_ADV_DEBUG_REGS 410 default 4 if 44x 411 default 2 412 413config PPC_ADV_DEBUG_DACS 414 int 415 depends on PPC_ADV_DEBUG_REGS 416 default 2 417 418config PPC_ADV_DEBUG_DVCS 419 int 420 depends on PPC_ADV_DEBUG_REGS 421 default 2 if 44x 422 default 0 423 424config PPC_ADV_DEBUG_DAC_RANGE 425 bool 426 depends on PPC_ADV_DEBUG_REGS && 44x 427 default y 428 429config PPC_DAWR 430 bool 431 432config PGTABLE_LEVELS 433 int 434 default 2 if !PPC64 435 default 4 436 437source "arch/powerpc/sysdev/Kconfig" 438source "arch/powerpc/platforms/Kconfig" 439 440menu "Kernel options" 441 442config HIGHMEM 443 bool "High memory support" 444 depends on PPC32 445 select KMAP_LOCAL 446 447source "kernel/Kconfig.hz" 448 449config MATH_EMULATION 450 bool "Math emulation" 451 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT 452 select PPC_FPU_REGS 453 help 454 Some PowerPC chips designed for embedded applications do not have 455 a floating-point unit and therefore do not implement the 456 floating-point instructions in the PowerPC instruction set. If you 457 say Y here, the kernel will include code to emulate a floating-point 458 unit, which will allow programs that use floating-point 459 instructions to run. 460 461 This is also useful to emulate missing (optional) instructions 462 such as fsqrt on cores that do have an FPU but do not implement 463 them (such as Freescale BookE). 464 465choice 466 prompt "Math emulation options" 467 default MATH_EMULATION_FULL 468 depends on MATH_EMULATION 469 470config MATH_EMULATION_FULL 471 bool "Emulate all the floating point instructions" 472 help 473 Select this option will enable the kernel to support to emulate 474 all the floating point instructions. If your SoC doesn't have 475 a FPU, you should select this. 476 477config MATH_EMULATION_HW_UNIMPLEMENTED 478 bool "Just emulate the FPU unimplemented instructions" 479 help 480 Select this if you know there does have a hardware FPU on your 481 SoC, but some floating point instructions are not implemented by that. 482 483endchoice 484 485config PPC_TRANSACTIONAL_MEM 486 bool "Transactional Memory support for POWERPC" 487 depends on PPC_BOOK3S_64 488 depends on SMP 489 select ALTIVEC 490 select VSX 491 help 492 Support user-mode Transactional Memory on POWERPC. 493 494config PPC_UV 495 bool "Ultravisor support" 496 depends on KVM_BOOK3S_HV_POSSIBLE 497 depends on DEVICE_PRIVATE 498 default n 499 help 500 This option paravirtualizes the kernel to run in POWER platforms that 501 supports the Protected Execution Facility (PEF). On such platforms, 502 the ultravisor firmware runs at a privilege level above the 503 hypervisor. 504 505 If unsure, say "N". 506 507config LD_HEAD_STUB_CATCH 508 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT 509 depends on PPC64 510 help 511 Very large kernels can cause linker branch stubs to be generated by 512 code in head_64.S, which moves the head text sections out of their 513 specified location. This option can work around the problem. 514 515 If unsure, say "N". 516 517config MPROFILE_KERNEL 518 depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER 519 def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) 520 521config HOTPLUG_CPU 522 bool "Support for enabling/disabling CPUs" 523 depends on SMP && (PPC_PSERIES || \ 524 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 525 help 526 Say Y here to be able to disable and re-enable individual 527 CPUs at runtime on SMP machines. 528 529 Say N if you are unsure. 530 531config PPC_QUEUED_SPINLOCKS 532 bool "Queued spinlocks" if EXPERT 533 depends on SMP 534 default PPC_BOOK3S_64 535 help 536 Say Y here to use queued spinlocks which give better scalability and 537 fairness on large SMP and NUMA systems without harming single threaded 538 performance. 539 540config ARCH_CPU_PROBE_RELEASE 541 def_bool y 542 depends on HOTPLUG_CPU 543 544config PPC64_SUPPORTS_MEMORY_FAILURE 545 bool "Add support for memory hwpoison" 546 depends on PPC_BOOK3S_64 547 default "y" if PPC_POWERNV 548 select ARCH_SUPPORTS_MEMORY_FAILURE 549 550config KEXEC 551 bool "kexec system call" 552 depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP) 553 select KEXEC_CORE 554 help 555 kexec is a system call that implements the ability to shutdown your 556 current kernel, and to start another kernel. It is like a reboot 557 but it is independent of the system firmware. And like a reboot 558 you can start any kernel with it, not just Linux. 559 560 The name comes from the similarity to the exec system call. 561 562 It is an ongoing process to be certain the hardware in a machine 563 is properly shutdown, so do not be surprised if this code does not 564 initially work for you. As of this writing the exact hardware 565 interface is strongly in flux, so no good recommendation can be 566 made. 567 568config KEXEC_FILE 569 bool "kexec file based system call" 570 select KEXEC_CORE 571 select HAVE_IMA_KEXEC if IMA 572 select KEXEC_ELF 573 depends on PPC64 574 depends on CRYPTO=y 575 depends on CRYPTO_SHA256=y 576 help 577 This is a new version of the kexec system call. This call is 578 file based and takes in file descriptors as system call arguments 579 for kernel and initramfs as opposed to a list of segments as is the 580 case for the older kexec call. 581 582config ARCH_HAS_KEXEC_PURGATORY 583 def_bool KEXEC_FILE 584 585config RELOCATABLE 586 bool "Build a relocatable kernel" 587 depends on PPC64 || (FLATMEM && (44x || PPC_85xx)) 588 select NONSTATIC_KERNEL 589 help 590 This builds a kernel image that is capable of running at the 591 location the kernel is loaded at. For ppc32, there is no any 592 alignment restrictions, and this feature is a superset of 593 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 594 16k-aligned base address. The kernel is linked as a 595 position-independent executable (PIE) and contains dynamic relocations 596 which are processed early in the bootup process. 597 598 One use is for the kexec on panic case where the recovery kernel 599 must live at a different physical address than the primary 600 kernel. 601 602 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 603 it has been loaded at and the compile time physical addresses 604 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 605 setting can still be useful to bootwrappers that need to know the 606 load address of the kernel (eg. u-boot/mkimage). 607 608config RANDOMIZE_BASE 609 bool "Randomize the address of the kernel image" 610 depends on PPC_85xx && FLATMEM 611 depends on RELOCATABLE 612 help 613 Randomizes the virtual address at which the kernel image is 614 loaded, as a security feature that deters exploit attempts 615 relying on knowledge of the location of kernel internals. 616 617 If unsure, say Y. 618 619config RELOCATABLE_TEST 620 bool "Test relocatable kernel" 621 depends on (PPC64 && RELOCATABLE) 622 help 623 This runs the relocatable kernel at the address it was initially 624 loaded at, which tends to be non-zero and therefore test the 625 relocation code. 626 627config CRASH_DUMP 628 bool "Build a dump capture kernel" 629 depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP) 630 select RELOCATABLE if PPC64 || 44x || PPC_85xx 631 help 632 Build a kernel suitable for use as a dump capture kernel. 633 The same kernel binary can be used as production kernel and dump 634 capture kernel. 635 636config FA_DUMP 637 bool "Firmware-assisted dump" 638 depends on PPC64 && (PPC_RTAS || PPC_POWERNV) 639 select CRASH_CORE 640 select CRASH_DUMP 641 help 642 A robust mechanism to get reliable kernel crash dump with 643 assistance from firmware. This approach does not use kexec, 644 instead firmware assists in booting the capture kernel 645 while preserving memory contents. Firmware-assisted dump 646 is meant to be a kdump replacement offering robustness and 647 speed not possible without system firmware assistance. 648 649 If unsure, say "y". Only special kernels like petitboot may 650 need to say "N" here. 651 652config PRESERVE_FA_DUMP 653 bool "Preserve Firmware-assisted dump" 654 depends on PPC64 && PPC_POWERNV && !FA_DUMP 655 help 656 On a kernel with FA_DUMP disabled, this option helps to preserve 657 crash data from a previously crash'ed kernel. Useful when the next 658 memory preserving kernel boot would process this crash data. 659 Petitboot kernel is the typical usecase for this option. 660 661config OPAL_CORE 662 bool "Export OPAL memory as /sys/firmware/opal/core" 663 depends on PPC64 && PPC_POWERNV 664 help 665 This option uses the MPIPL support in firmware to provide an 666 ELF core of OPAL memory after a crash. The ELF core is exported 667 as /sys/firmware/opal/core file which is helpful in debugging 668 OPAL crashes using GDB. 669 670config IRQ_ALL_CPUS 671 bool "Distribute interrupts on all CPUs by default" 672 depends on SMP 673 help 674 This option gives the kernel permission to distribute IRQs across 675 multiple CPUs. Saying N here will route all IRQs to the first 676 CPU. Generally saying Y is safe, although some problems have been 677 reported with SMP Power Macintoshes with this option enabled. 678 679config NUMA 680 bool "NUMA Memory Allocation and Scheduler Support" 681 depends on PPC64 && SMP 682 default y if PPC_PSERIES || PPC_POWERNV 683 select USE_PERCPU_NUMA_NODE_ID 684 help 685 Enable NUMA (Non-Uniform Memory Access) support. 686 687 The kernel will try to allocate memory used by a CPU on the 688 local memory controller of the CPU and add some more 689 NUMA awareness to the kernel. 690 691config NODES_SHIFT 692 int 693 default "8" if PPC64 694 default "4" 695 depends on NUMA 696 697config HAVE_MEMORYLESS_NODES 698 def_bool y 699 depends on NUMA 700 701config ARCH_SELECT_MEMORY_MODEL 702 def_bool y 703 depends on PPC64 704 705config ARCH_FLATMEM_ENABLE 706 def_bool y 707 depends on (PPC64 && !NUMA) || PPC32 708 709config ARCH_SPARSEMEM_ENABLE 710 def_bool y 711 depends on PPC64 712 select SPARSEMEM_VMEMMAP_ENABLE 713 714config ARCH_SPARSEMEM_DEFAULT 715 def_bool y 716 depends on PPC_BOOK3S_64 717 718config ILLEGAL_POINTER_VALUE 719 hex 720 # This is roughly half way between the top of user space and the bottom 721 # of kernel space, which seems about as good as we can get. 722 default 0x5deadbeef0000000 if PPC64 723 default 0 724 725config ARCH_MEMORY_PROBE 726 def_bool y 727 depends on MEMORY_HOTPLUG 728 729choice 730 prompt "Page size" 731 default PPC_64K_PAGES if PPC_BOOK3S_64 732 default PPC_4K_PAGES 733 help 734 Select the kernel logical page size. Increasing the page size 735 will reduce software overhead at each page boundary, allow 736 hardware prefetch mechanisms to be more effective, and allow 737 larger dma transfers increasing IO efficiency and reducing 738 overhead. However the utilization of memory will increase. 739 For example, each cached file will using a multiple of the 740 page size to hold its contents and the difference between the 741 end of file and the end of page is wasted. 742 743 Some dedicated systems, such as software raid serving with 744 accelerated calculations, have shown significant increases. 745 746 If you configure a 64 bit kernel for 64k pages but the 747 processor does not support them, then the kernel will simulate 748 them with 4k pages, loading them on demand, but with the 749 reduced software overhead and larger internal fragmentation. 750 For the 32 bit kernel, a large page option will not be offered 751 unless it is supported by the configured processor. 752 753 If unsure, choose 4K_PAGES. 754 755config PPC_4K_PAGES 756 bool "4k page size" 757 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 758 759config PPC_16K_PAGES 760 bool "16k page size" 761 depends on 44x || PPC_8xx 762 763config PPC_64K_PAGES 764 bool "64k page size" 765 depends on 44x || PPC_BOOK3S_64 766 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 767 768config PPC_256K_PAGES 769 bool "256k page size (Requires non-standard binutils settings)" 770 depends on 44x && !PPC_47x 771 help 772 Make the page size 256k. 773 774 The kernel will only be able to run applications that have been 775 compiled with '-zmax-page-size' set to 256K (the default is 64K) using 776 binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE 777 definition from 0x10000 to 0x40000 in older versions. 778 779endchoice 780 781config PAGE_SIZE_4KB 782 def_bool y 783 depends on PPC_4K_PAGES 784 785config PAGE_SIZE_16KB 786 def_bool y 787 depends on PPC_16K_PAGES 788 789config PAGE_SIZE_64KB 790 def_bool y 791 depends on PPC_64K_PAGES 792 793config PAGE_SIZE_256KB 794 def_bool y 795 depends on PPC_256K_PAGES 796 797config PPC_PAGE_SHIFT 798 int 799 default 18 if PPC_256K_PAGES 800 default 16 if PPC_64K_PAGES 801 default 14 if PPC_16K_PAGES 802 default 12 803 804config THREAD_SHIFT 805 int "Thread shift" if EXPERT 806 range 13 15 807 default "15" if PPC_256K_PAGES 808 default "14" if PPC64 809 default "13" 810 help 811 Used to define the stack size. The default is almost always what you 812 want. Only change this if you know what you are doing. 813 814config DATA_SHIFT_BOOL 815 bool "Set custom data alignment" 816 depends on ADVANCED_OPTIONS 817 depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE 818 depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \ 819 PPC_85xx 820 help 821 This option allows you to set the kernel data alignment. When 822 RAM is mapped by blocks, the alignment needs to fit the size and 823 number of possible blocks. The default should be OK for most configs. 824 825 Say N here unless you know what you are doing. 826 827config DATA_SHIFT 828 int "Data shift" if DATA_SHIFT_BOOL 829 default 24 if STRICT_KERNEL_RWX && PPC64 830 range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 831 range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 832 range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx 833 default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 834 default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 835 default 23 if STRICT_KERNEL_RWX && PPC_8xx 836 default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA 837 default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 838 default 24 if STRICT_KERNEL_RWX && PPC_85xx 839 default PPC_PAGE_SHIFT 840 help 841 On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. 842 Smaller is the alignment, greater is the number of necessary DBATs. 843 844 On 8xx, large pages (512kb or 8M) are used to map kernel linear 845 memory. Aligning to 8M reduces TLB misses as only 8M pages are used 846 in that case. If PIN_TLB is selected, it must be aligned to 8M as 847 8M pages will be pinned. 848 849config ARCH_FORCE_MAX_ORDER 850 int "Maximum zone order" 851 range 8 9 if PPC64 && PPC_64K_PAGES 852 default "9" if PPC64 && PPC_64K_PAGES 853 range 13 13 if PPC64 && !PPC_64K_PAGES 854 default "13" if PPC64 && !PPC_64K_PAGES 855 range 9 64 if PPC32 && PPC_16K_PAGES 856 default "9" if PPC32 && PPC_16K_PAGES 857 range 7 64 if PPC32 && PPC_64K_PAGES 858 default "7" if PPC32 && PPC_64K_PAGES 859 range 5 64 if PPC32 && PPC_256K_PAGES 860 default "5" if PPC32 && PPC_256K_PAGES 861 range 11 64 862 default "11" 863 help 864 The kernel memory allocator divides physically contiguous memory 865 blocks into "zones", where each zone is a power of two number of 866 pages. This option selects the largest power of two that the kernel 867 keeps in the memory allocator. If you need to allocate very large 868 blocks of physically contiguous memory, then you may need to 869 increase this value. 870 871 This config option is actually maximum order plus one. For example, 872 a value of 11 means that the largest free memory block is 2^10 pages. 873 874 The page size is not necessarily 4KB. For example, on 64-bit 875 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 876 this in mind when choosing a value for this option. 877 878config PPC_SUBPAGE_PROT 879 bool "Support setting protections for 4k subpages (subpage_prot syscall)" 880 default n 881 depends on PPC_64S_HASH_MMU && PPC_64K_PAGES 882 help 883 This option adds support for system call to allow user programs 884 to set access permissions (read/write, readonly, or no access) 885 on the 4k subpages of each 64k page. 886 887 If unsure, say N here. 888 889config PPC_PROT_SAO_LPAR 890 bool "Support PROT_SAO mappings in LPARs" 891 depends on PPC_BOOK3S_64 892 help 893 This option adds support for PROT_SAO mappings from userspace 894 inside LPARs on supported CPUs. 895 896 This may cause issues when performing guest migration from 897 a CPU that supports SAO to one that does not. 898 899 If unsure, say N here. 900 901config PPC_COPRO_BASE 902 bool 903 904config SCHED_SMT 905 bool "SMT (Hyperthreading) scheduler support" 906 depends on PPC64 && SMP 907 help 908 SMT scheduler support improves the CPU scheduler's decision making 909 when dealing with POWER5 cpus at a cost of slightly increased 910 overhead in some places. If unsure say N here. 911 912config PPC_DENORMALISATION 913 bool "PowerPC denormalisation exception handling" 914 depends on PPC_BOOK3S_64 915 default "y" if PPC_POWERNV 916 help 917 Add support for handling denormalisation of single precision 918 values. Useful for bare metal only. If unsure say Y here. 919 920config CMDLINE 921 string "Initial kernel command string" 922 default "" 923 help 924 On some platforms, there is currently no way for the boot loader to 925 pass arguments to the kernel. For these platforms, you can supply 926 some command-line options at build time by entering them here. In 927 most cases you will need to specify the root device here. 928 929choice 930 prompt "Kernel command line type" if CMDLINE != "" 931 default CMDLINE_FROM_BOOTLOADER 932 933config CMDLINE_FROM_BOOTLOADER 934 bool "Use bootloader kernel arguments if available" 935 help 936 Uses the command-line options passed by the boot loader. If 937 the boot loader doesn't provide any, the default kernel command 938 string provided in CMDLINE will be used. 939 940config CMDLINE_EXTEND 941 bool "Extend bootloader kernel arguments" 942 help 943 The command-line arguments provided by the boot loader will be 944 appended to the default kernel command string. 945 946config CMDLINE_FORCE 947 bool "Always use the default kernel command string" 948 help 949 Always use the default kernel command string, even if the boot 950 loader passes other arguments to the kernel. 951 This is useful if you cannot or don't want to change the 952 command-line options your boot loader passes to the kernel. 953 954endchoice 955 956config EXTRA_TARGETS 957 string "Additional default image types" 958 help 959 List additional targets to be built by the bootwrapper here (separated 960 by spaces). This is useful for targets that depend of device tree 961 files in the .dts directory. 962 963 Targets in this list will be build as part of the default build 964 target, or when the user does a 'make zImage' or a 965 'make zImage.initrd'. 966 967 If unsure, leave blank 968 969config ARCH_WANTS_FREEZER_CONTROL 970 def_bool y 971 depends on ADB_PMU 972 973source "kernel/power/Kconfig" 974 975config PPC_MEM_KEYS 976 prompt "PowerPC Memory Protection Keys" 977 def_bool y 978 depends on PPC_BOOK3S_64 979 depends on PPC_64S_HASH_MMU 980 select ARCH_USES_HIGH_VMA_FLAGS 981 select ARCH_HAS_PKEYS 982 help 983 Memory Protection Keys provides a mechanism for enforcing 984 page-based protections, but without requiring modification of the 985 page tables when an application changes protection domains. 986 987 For details, see Documentation/core-api/protection-keys.rst 988 989 If unsure, say y. 990 991config PPC_SECURE_BOOT 992 prompt "Enable secure boot support" 993 bool 994 depends on PPC_POWERNV || PPC_PSERIES 995 depends on IMA_ARCH_POLICY 996 imply IMA_SECURE_AND_OR_TRUSTED_BOOT 997 help 998 Systems with firmware secure boot enabled need to define security 999 policies to extend secure boot to the OS. This config allows a user 1000 to enable OS secure boot on systems that have firmware support for 1001 it. If in doubt say N. 1002 1003config PPC_SECVAR_SYSFS 1004 bool "Enable sysfs interface for POWER secure variables" 1005 default y 1006 depends on PPC_SECURE_BOOT 1007 depends on SYSFS 1008 help 1009 POWER secure variables are managed and controlled by firmware. 1010 These variables are exposed to userspace via sysfs to enable 1011 read/write operations on these variables. Say Y if you have 1012 secure boot enabled and want to expose variables to userspace. 1013 1014config PPC_RTAS_FILTER 1015 bool "Enable filtering of RTAS syscalls" 1016 default y 1017 depends on PPC_RTAS 1018 help 1019 The RTAS syscall API has security issues that could be used to 1020 compromise system integrity. This option enforces restrictions on the 1021 RTAS calls and arguments passed by userspace programs to mitigate 1022 these issues. 1023 1024 Say Y unless you know what you are doing and the filter is causing 1025 problems for you. 1026 1027endmenu 1028 1029config ISA_DMA_API 1030 bool 1031 default PCI 1032 1033menu "Bus options" 1034 1035config ISA 1036 bool "Support for ISA-bus hardware" 1037 depends on PPC_CHRP 1038 select PPC_I8259 1039 help 1040 Find out whether you have ISA slots on your motherboard. ISA is the 1041 name of a bus system, i.e. the way the CPU talks to the other stuff 1042 inside your box. If you have an Apple machine, say N here; if you 1043 have an IBM RS/6000 or pSeries machine, say Y. If you have an 1044 embedded board, consult your board documentation. 1045 1046config GENERIC_ISA_DMA 1047 bool 1048 depends on ISA_DMA_API 1049 default y 1050 1051config PPC_INDIRECT_PCI 1052 bool 1053 depends on PCI 1054 default y if 40x || 44x 1055 1056config SBUS 1057 bool 1058 1059config FSL_SOC 1060 bool 1061 1062config FSL_PCI 1063 bool 1064 select ARCH_HAS_DMA_SET_MASK 1065 select PPC_INDIRECT_PCI 1066 select PCI_QUIRKS 1067 1068config FSL_PMC 1069 bool 1070 default y 1071 depends on SUSPEND && (PPC_85xx || PPC_86xx) 1072 help 1073 Freescale MPC85xx/MPC86xx power management controller support 1074 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 1075 1076config PPC4xx_CPM 1077 bool 1078 default y 1079 depends on SUSPEND && (44x || 40x) 1080 help 1081 PPC4xx Clock Power Management (CPM) support (suspend/resume). 1082 It also enables support for two different idle states (idle-wait 1083 and idle-doze). 1084 1085config 4xx_SOC 1086 bool 1087 1088config FSL_LBC 1089 bool "Freescale Local Bus support" 1090 help 1091 Enables reporting of errors from the Freescale local bus 1092 controller. Also contains some common code used by 1093 drivers for specific local bus peripherals. 1094 1095config FSL_GTM 1096 bool 1097 depends on PPC_83xx || QUICC_ENGINE || CPM2 1098 help 1099 Freescale General-purpose Timers support 1100 1101config PCI_8260 1102 bool 1103 depends on PCI && 8260 1104 select PPC_INDIRECT_PCI 1105 default y 1106 1107config FSL_RIO 1108 bool "Freescale Embedded SRIO Controller support" 1109 depends on RAPIDIO = y && HAVE_RAPIDIO 1110 default "n" 1111 help 1112 Include support for RapidIO controller on Freescale embedded 1113 processors (MPC8548, MPC8641, etc). 1114 1115endmenu 1116 1117config NONSTATIC_KERNEL 1118 bool 1119 1120menu "Advanced setup" 1121 depends on PPC32 1122 1123config ADVANCED_OPTIONS 1124 bool "Prompt for advanced kernel configuration options" 1125 help 1126 This option will enable prompting for a variety of advanced kernel 1127 configuration options. These options can cause the kernel to not 1128 work if they are set incorrectly, but can be used to optimize certain 1129 aspects of kernel memory management. 1130 1131 Unless you know what you are doing, say N here. 1132 1133comment "Default settings for advanced configuration options are used" 1134 depends on !ADVANCED_OPTIONS 1135 1136config LOWMEM_SIZE_BOOL 1137 bool "Set maximum low memory" 1138 depends on ADVANCED_OPTIONS 1139 help 1140 This option allows you to set the maximum amount of memory which 1141 will be used as "low memory", that is, memory which the kernel can 1142 access directly, without having to set up a kernel virtual mapping. 1143 This can be useful in optimizing the layout of kernel virtual 1144 memory. 1145 1146 Say N here unless you know what you are doing. 1147 1148config LOWMEM_SIZE 1149 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1150 default "0x30000000" 1151 1152config LOWMEM_CAM_NUM_BOOL 1153 bool "Set number of CAMs to use to map low memory" 1154 depends on ADVANCED_OPTIONS && PPC_85xx 1155 help 1156 This option allows you to set the maximum number of CAM slots that 1157 will be used to map low memory. There are a limited number of slots 1158 available and even more limited number that will fit in the L1 MMU. 1159 However, using more entries will allow mapping more low memory. This 1160 can be useful in optimizing the layout of kernel virtual memory. 1161 1162 Say N here unless you know what you are doing. 1163 1164config LOWMEM_CAM_NUM 1165 depends on PPC_85xx 1166 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1167 default 3 if !STRICT_KERNEL_RWX 1168 default 9 if DATA_SHIFT >= 24 1169 default 12 if DATA_SHIFT >= 22 1170 default 15 1171 1172config DYNAMIC_MEMSTART 1173 bool "Enable page aligned dynamic load address for kernel" 1174 depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x) 1175 select NONSTATIC_KERNEL 1176 help 1177 This option enables the kernel to be loaded at any page aligned 1178 physical address. The kernel creates a mapping from KERNELBASE to 1179 the address where the kernel is loaded. The page size here implies 1180 the TLB page size of the mapping for kernel on the particular platform. 1181 Please refer to the init code for finding the TLB page size. 1182 1183 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1184 kernel image, where the only restriction is the page aligned kernel 1185 load address. When this option is enabled, the compile time physical 1186 address CONFIG_PHYSICAL_START is ignored. 1187 1188 This option is overridden by CONFIG_RELOCATABLE 1189 1190config PAGE_OFFSET_BOOL 1191 bool "Set custom page offset address" 1192 depends on ADVANCED_OPTIONS 1193 help 1194 This option allows you to set the kernel virtual address at which 1195 the kernel will map low memory. This can be useful in optimizing 1196 the virtual memory layout of the system. 1197 1198 Say N here unless you know what you are doing. 1199 1200config PAGE_OFFSET 1201 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1202 default "0xc0000000" 1203 1204config KERNEL_START_BOOL 1205 bool "Set custom kernel base address" 1206 depends on ADVANCED_OPTIONS 1207 help 1208 This option allows you to set the kernel virtual address at which 1209 the kernel will be loaded. Normally this should match PAGE_OFFSET 1210 however there are times (like kdump) that one might not want them 1211 to be the same. 1212 1213 Say N here unless you know what you are doing. 1214 1215config KERNEL_START 1216 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1217 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1218 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1219 default "0xc0000000" 1220 1221config PHYSICAL_START_BOOL 1222 bool "Set physical address where the kernel is loaded" 1223 depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx 1224 help 1225 This gives the physical address where the kernel is loaded. 1226 1227 Say N here unless you know what you are doing. 1228 1229config PHYSICAL_START 1230 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1231 default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL 1232 default "0x00000000" 1233 1234config PHYSICAL_ALIGN 1235 hex 1236 default "0x04000000" if PPC_85xx 1237 help 1238 This value puts the alignment restrictions on physical address 1239 where kernel is loaded and run from. Kernel is compiled for an 1240 address which meets above alignment restriction. 1241 1242config TASK_SIZE_BOOL 1243 bool "Set custom user task size" 1244 depends on ADVANCED_OPTIONS 1245 help 1246 This option allows you to set the amount of virtual address space 1247 allocated to user tasks. This can be useful in optimizing the 1248 virtual memory layout of the system. 1249 1250 Say N here unless you know what you are doing. 1251 1252config TASK_SIZE 1253 hex "Size of user task space" if TASK_SIZE_BOOL 1254 default "0x80000000" if PPC_8xx 1255 default "0xb0000000" if PPC_BOOK3S_32 1256 default "0xc0000000" 1257endmenu 1258 1259if PPC64 1260# This value must have zeroes in the bottom 60 bits otherwise lots will break 1261config PAGE_OFFSET 1262 hex 1263 default "0xc000000000000000" 1264config KERNEL_START 1265 hex 1266 default "0xc000000000000000" 1267config PHYSICAL_START 1268 hex 1269 default "0x00000000" 1270endif 1271 1272config PPC_LIB_RHEAP 1273 bool 1274 1275source "arch/powerpc/kvm/Kconfig" 1276 1277source "kernel/livepatch/Kconfig" 1278