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_SPLIT_ARG64 if PPC32 151 select ARCH_STACKWALK 152 select ARCH_SUPPORTS_ATOMIC_RMW 153 select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x 154 select ARCH_USE_BUILTIN_BSWAP 155 select ARCH_USE_CMPXCHG_LOCKREF if PPC64 156 select ARCH_USE_MEMTEST 157 select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS 158 select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS 159 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT 160 select ARCH_WANT_IPC_PARSE_VERSION 161 select ARCH_WANT_IRQS_OFF_ACTIVATE_MM 162 select ARCH_WANT_LD_ORPHAN_WARN 163 select ARCH_WANTS_MODULES_DATA_IN_VMALLOC if PPC_BOOK3S_32 || PPC_8xx 164 select ARCH_WANTS_NO_INSTR 165 select ARCH_WEAK_RELEASE_ACQUIRE 166 select BINFMT_ELF 167 select BUILDTIME_TABLE_SORT 168 select CLONE_BACKWARDS 169 select CPUMASK_OFFSTACK if NR_CPUS >= 8192 170 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN 171 select DMA_OPS_BYPASS if PPC64 172 select DMA_OPS if PPC64 173 select DYNAMIC_FTRACE if FUNCTION_TRACER 174 select EDAC_ATOMIC_SCRUB 175 select EDAC_SUPPORT 176 select GENERIC_ATOMIC64 if PPC32 177 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 178 select GENERIC_CMOS_UPDATE 179 select GENERIC_CPU_AUTOPROBE 180 select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC 181 select GENERIC_EARLY_IOREMAP 182 select GENERIC_GETTIMEOFDAY 183 select GENERIC_IRQ_SHOW 184 select GENERIC_IRQ_SHOW_LEVEL 185 select GENERIC_PCI_IOMAP if PCI 186 select GENERIC_PTDUMP 187 select GENERIC_SMP_IDLE_THREAD 188 select GENERIC_TIME_VSYSCALL 189 select GENERIC_VDSO_TIME_NS 190 select HAVE_ARCH_AUDITSYSCALL 191 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP 192 select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx 193 select HAVE_ARCH_JUMP_LABEL 194 select HAVE_ARCH_JUMP_LABEL_RELATIVE 195 select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 196 select HAVE_ARCH_KASAN if PPC_RADIX_MMU 197 select HAVE_ARCH_KASAN if PPC_BOOK3E_64 198 select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN 199 select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC 200 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET 201 select HAVE_ARCH_KGDB 202 select HAVE_ARCH_MMAP_RND_BITS 203 select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT 204 select HAVE_ARCH_NVRAM_OPS 205 select HAVE_ARCH_SECCOMP_FILTER 206 select HAVE_ARCH_TRACEHOOK 207 select HAVE_ASM_MODVERSIONS 208 select HAVE_CONTEXT_TRACKING_USER if PPC64 209 select HAVE_C_RECORDMCOUNT 210 select HAVE_DEBUG_KMEMLEAK 211 select HAVE_DEBUG_STACKOVERFLOW 212 select HAVE_DYNAMIC_FTRACE 213 select HAVE_DYNAMIC_FTRACE_WITH_ARGS if MPROFILE_KERNEL || PPC32 214 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL || PPC32 215 select HAVE_EBPF_JIT 216 select HAVE_EFFICIENT_UNALIGNED_ACCESS 217 select HAVE_FAST_GUP 218 select HAVE_FTRACE_MCOUNT_RECORD 219 select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1 220 select HAVE_FUNCTION_ERROR_INJECTION 221 select HAVE_FUNCTION_GRAPH_TRACER 222 select HAVE_FUNCTION_TRACER 223 select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC 224 select HAVE_GENERIC_VDSO 225 select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP 226 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH 227 select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) 228 select HAVE_IOREMAP_PROT 229 select HAVE_IRQ_TIME_ACCOUNTING 230 select HAVE_KERNEL_GZIP 231 select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE 232 select HAVE_KERNEL_LZO if DEFAULT_UIMAGE 233 select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x 234 select HAVE_KPROBES 235 select HAVE_KPROBES_ON_FTRACE 236 select HAVE_KRETPROBES 237 select HAVE_LD_DEAD_CODE_DATA_ELIMINATION 238 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS 239 select HAVE_MOD_ARCH_SPECIFIC 240 select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) 241 select HAVE_OPTPROBES 242 select HAVE_PERF_EVENTS 243 select HAVE_PERF_EVENTS_NMI if PPC64 244 select HAVE_PERF_REGS 245 select HAVE_PERF_USER_STACK_DUMP 246 select HAVE_REGS_AND_STACK_ACCESS_API 247 select HAVE_RELIABLE_STACKTRACE 248 select HAVE_RSEQ 249 select HAVE_SETUP_PER_CPU_AREA if PPC64 250 select HAVE_SOFTIRQ_ON_OWN_STACK 251 select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) 252 select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) 253 select HAVE_STATIC_CALL if PPC32 254 select HAVE_SYSCALL_TRACEPOINTS 255 select HAVE_VIRT_CPU_ACCOUNTING 256 select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE 257 select IOMMU_HELPER if PPC64 258 select IRQ_DOMAIN 259 select IRQ_FORCED_THREADING 260 select KASAN_VMALLOC if KASAN && MODULES 261 select MMU_GATHER_PAGE_SIZE 262 select MMU_GATHER_RCU_TABLE_FREE 263 select MMU_GATHER_MERGE_VMAS 264 select MODULES_USE_ELF_RELA 265 select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE 266 select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64 267 select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64 268 select NEED_SG_DMA_LENGTH 269 select OF 270 select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE 271 select OF_EARLY_FLATTREE 272 select OLD_SIGACTION if PPC32 273 select OLD_SIGSUSPEND 274 select PCI_DOMAINS if PCI 275 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI 276 select PCI_SYSCALL if PCI 277 select PPC_DAWR if PPC64 278 select RTC_LIB 279 select SPARSE_IRQ 280 select STRICT_KERNEL_RWX if STRICT_MODULE_RWX 281 select SYSCTL_EXCEPTION_TRACE 282 select THREAD_INFO_IN_TASK 283 select TRACE_IRQFLAGS_SUPPORT 284 # 285 # Please keep this list sorted alphabetically. 286 # 287 288config PPC_LONG_DOUBLE_128 289 depends on PPC64 && ALTIVEC 290 def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1) 291 292config PPC_BARRIER_NOSPEC 293 bool 294 default y 295 depends on PPC_BOOK3S_64 || PPC_E500 296 297config EARLY_PRINTK 298 bool 299 default y 300 301config PANIC_TIMEOUT 302 int 303 default 180 304 305config COMPAT 306 bool "Enable support for 32bit binaries" 307 depends on PPC64 308 depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 309 default y if !CPU_LITTLE_ENDIAN 310 select ARCH_WANT_OLD_COMPAT_IPC 311 select COMPAT_OLD_SIGACTION 312 313config SCHED_OMIT_FRAME_POINTER 314 bool 315 default y 316 317config ARCH_MAY_HAVE_PC_FDC 318 bool 319 default PCI 320 321config PPC_UDBG_16550 322 bool 323 324config GENERIC_TBSYNC 325 bool 326 default y if PPC32 && SMP 327 328config AUDIT_ARCH 329 bool 330 default y 331 332config GENERIC_BUG 333 bool 334 default y 335 depends on BUG 336 337config GENERIC_BUG_RELATIVE_POINTERS 338 def_bool y 339 depends on GENERIC_BUG 340 341config SYS_SUPPORTS_APM_EMULATION 342 default y if PMAC_APM_EMU 343 bool 344 345config EPAPR_BOOT 346 bool 347 help 348 Used to allow a board to specify it wants an ePAPR compliant wrapper. 349 350config DEFAULT_UIMAGE 351 bool 352 help 353 Used to allow a board to specify it wants a uImage built by default 354 355config ARCH_HIBERNATION_POSSIBLE 356 bool 357 default y 358 359config ARCH_SUSPEND_POSSIBLE 360 def_bool y 361 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ 362 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ 363 || 44x || 40x 364 365config ARCH_SUSPEND_NONZERO_CPU 366 def_bool y 367 depends on PPC_POWERNV || PPC_PSERIES 368 369config ARCH_HAS_ADD_PAGES 370 def_bool y 371 depends on ARCH_ENABLE_MEMORY_HOTPLUG 372 373config PPC_DCR_NATIVE 374 bool 375 376config PPC_DCR_MMIO 377 bool 378 379config PPC_DCR 380 bool 381 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO 382 default y 383 384config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT 385 depends on PPC32 386 depends on !PPC_PMAC && !PPC_CHRP 387 bool "Assign PCI bus numbers from zero individually for each PCI domain" 388 help 389 By default on PPC32 were PCI bus numbers unique across all PCI domains. 390 So system could have only 256 PCI buses independently of available 391 PCI domains. When this option is enabled then PCI bus numbers are 392 PCI domain dependent and each PCI controller on own domain can have 393 256 PCI buses, like it is on other Linux architectures. 394 395config PPC_OF_PLATFORM_PCI 396 bool 397 depends on PCI 398 depends on PPC64 # not supported on 32 bits yet 399 400config ARCH_SUPPORTS_UPROBES 401 def_bool y 402 403config PPC_ADV_DEBUG_REGS 404 bool 405 depends on 40x || BOOKE 406 default y 407 408config PPC_ADV_DEBUG_IACS 409 int 410 depends on PPC_ADV_DEBUG_REGS 411 default 4 if 44x 412 default 2 413 414config PPC_ADV_DEBUG_DACS 415 int 416 depends on PPC_ADV_DEBUG_REGS 417 default 2 418 419config PPC_ADV_DEBUG_DVCS 420 int 421 depends on PPC_ADV_DEBUG_REGS 422 default 2 if 44x 423 default 0 424 425config PPC_ADV_DEBUG_DAC_RANGE 426 bool 427 depends on PPC_ADV_DEBUG_REGS && 44x 428 default y 429 430config PPC_DAWR 431 bool 432 433config PGTABLE_LEVELS 434 int 435 default 2 if !PPC64 436 default 4 437 438source "arch/powerpc/sysdev/Kconfig" 439source "arch/powerpc/platforms/Kconfig" 440 441menu "Kernel options" 442 443config HIGHMEM 444 bool "High memory support" 445 depends on PPC32 446 select KMAP_LOCAL 447 448source "kernel/Kconfig.hz" 449 450config MATH_EMULATION 451 bool "Math emulation" 452 depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT 453 select PPC_FPU_REGS 454 help 455 Some PowerPC chips designed for embedded applications do not have 456 a floating-point unit and therefore do not implement the 457 floating-point instructions in the PowerPC instruction set. If you 458 say Y here, the kernel will include code to emulate a floating-point 459 unit, which will allow programs that use floating-point 460 instructions to run. 461 462 This is also useful to emulate missing (optional) instructions 463 such as fsqrt on cores that do have an FPU but do not implement 464 them (such as Freescale BookE). 465 466choice 467 prompt "Math emulation options" 468 default MATH_EMULATION_FULL 469 depends on MATH_EMULATION 470 471config MATH_EMULATION_FULL 472 bool "Emulate all the floating point instructions" 473 help 474 Select this option will enable the kernel to support to emulate 475 all the floating point instructions. If your SoC doesn't have 476 a FPU, you should select this. 477 478config MATH_EMULATION_HW_UNIMPLEMENTED 479 bool "Just emulate the FPU unimplemented instructions" 480 help 481 Select this if you know there does have a hardware FPU on your 482 SoC, but some floating point instructions are not implemented by that. 483 484endchoice 485 486config PPC_TRANSACTIONAL_MEM 487 bool "Transactional Memory support for POWERPC" 488 depends on PPC_BOOK3S_64 489 depends on SMP 490 select ALTIVEC 491 select VSX 492 help 493 Support user-mode Transactional Memory on POWERPC. 494 495config PPC_UV 496 bool "Ultravisor support" 497 depends on KVM_BOOK3S_HV_POSSIBLE 498 depends on DEVICE_PRIVATE 499 default n 500 help 501 This option paravirtualizes the kernel to run in POWER platforms that 502 supports the Protected Execution Facility (PEF). On such platforms, 503 the ultravisor firmware runs at a privilege level above the 504 hypervisor. 505 506 If unsure, say "N". 507 508config LD_HEAD_STUB_CATCH 509 bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT 510 depends on PPC64 511 help 512 Very large kernels can cause linker branch stubs to be generated by 513 code in head_64.S, which moves the head text sections out of their 514 specified location. This option can work around the problem. 515 516 If unsure, say "N". 517 518config MPROFILE_KERNEL 519 depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER 520 def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) 521 522config HOTPLUG_CPU 523 bool "Support for enabling/disabling CPUs" 524 depends on SMP && (PPC_PSERIES || \ 525 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) 526 help 527 Say Y here to be able to disable and re-enable individual 528 CPUs at runtime on SMP machines. 529 530 Say N if you are unsure. 531 532config PPC_QUEUED_SPINLOCKS 533 bool "Queued spinlocks" if EXPERT 534 depends on SMP 535 default PPC_BOOK3S_64 536 help 537 Say Y here to use queued spinlocks which give better scalability and 538 fairness on large SMP and NUMA systems without harming single threaded 539 performance. 540 541config ARCH_CPU_PROBE_RELEASE 542 def_bool y 543 depends on HOTPLUG_CPU 544 545config PPC64_SUPPORTS_MEMORY_FAILURE 546 bool "Add support for memory hwpoison" 547 depends on PPC_BOOK3S_64 548 default "y" if PPC_POWERNV 549 select ARCH_SUPPORTS_MEMORY_FAILURE 550 551config KEXEC 552 bool "kexec system call" 553 depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP) 554 select KEXEC_CORE 555 help 556 kexec is a system call that implements the ability to shutdown your 557 current kernel, and to start another kernel. It is like a reboot 558 but it is independent of the system firmware. And like a reboot 559 you can start any kernel with it, not just Linux. 560 561 The name comes from the similarity to the exec system call. 562 563 It is an ongoing process to be certain the hardware in a machine 564 is properly shutdown, so do not be surprised if this code does not 565 initially work for you. As of this writing the exact hardware 566 interface is strongly in flux, so no good recommendation can be 567 made. 568 569config KEXEC_FILE 570 bool "kexec file based system call" 571 select KEXEC_CORE 572 select HAVE_IMA_KEXEC if IMA 573 select KEXEC_ELF 574 depends on PPC64 575 depends on CRYPTO=y 576 depends on CRYPTO_SHA256=y 577 help 578 This is a new version of the kexec system call. This call is 579 file based and takes in file descriptors as system call arguments 580 for kernel and initramfs as opposed to a list of segments as is the 581 case for the older kexec call. 582 583config ARCH_HAS_KEXEC_PURGATORY 584 def_bool KEXEC_FILE 585 586config RELOCATABLE 587 bool "Build a relocatable kernel" 588 depends on PPC64 || (FLATMEM && (44x || PPC_85xx)) 589 select NONSTATIC_KERNEL 590 help 591 This builds a kernel image that is capable of running at the 592 location the kernel is loaded at. For ppc32, there is no any 593 alignment restrictions, and this feature is a superset of 594 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use 595 16k-aligned base address. The kernel is linked as a 596 position-independent executable (PIE) and contains dynamic relocations 597 which are processed early in the bootup process. 598 599 One use is for the kexec on panic case where the recovery kernel 600 must live at a different physical address than the primary 601 kernel. 602 603 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address 604 it has been loaded at and the compile time physical addresses 605 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START 606 setting can still be useful to bootwrappers that need to know the 607 load address of the kernel (eg. u-boot/mkimage). 608 609config RANDOMIZE_BASE 610 bool "Randomize the address of the kernel image" 611 depends on PPC_85xx && FLATMEM 612 depends on RELOCATABLE 613 help 614 Randomizes the virtual address at which the kernel image is 615 loaded, as a security feature that deters exploit attempts 616 relying on knowledge of the location of kernel internals. 617 618 If unsure, say Y. 619 620config RELOCATABLE_TEST 621 bool "Test relocatable kernel" 622 depends on (PPC64 && RELOCATABLE) 623 help 624 This runs the relocatable kernel at the address it was initially 625 loaded at, which tends to be non-zero and therefore test the 626 relocation code. 627 628config CRASH_DUMP 629 bool "Build a dump capture kernel" 630 depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP) 631 select RELOCATABLE if PPC64 || 44x || PPC_85xx 632 help 633 Build a kernel suitable for use as a dump capture kernel. 634 The same kernel binary can be used as production kernel and dump 635 capture kernel. 636 637config FA_DUMP 638 bool "Firmware-assisted dump" 639 depends on PPC64 && (PPC_RTAS || PPC_POWERNV) 640 select CRASH_CORE 641 select CRASH_DUMP 642 help 643 A robust mechanism to get reliable kernel crash dump with 644 assistance from firmware. This approach does not use kexec, 645 instead firmware assists in booting the capture kernel 646 while preserving memory contents. Firmware-assisted dump 647 is meant to be a kdump replacement offering robustness and 648 speed not possible without system firmware assistance. 649 650 If unsure, say "y". Only special kernels like petitboot may 651 need to say "N" here. 652 653config PRESERVE_FA_DUMP 654 bool "Preserve Firmware-assisted dump" 655 depends on PPC64 && PPC_POWERNV && !FA_DUMP 656 help 657 On a kernel with FA_DUMP disabled, this option helps to preserve 658 crash data from a previously crash'ed kernel. Useful when the next 659 memory preserving kernel boot would process this crash data. 660 Petitboot kernel is the typical usecase for this option. 661 662config OPAL_CORE 663 bool "Export OPAL memory as /sys/firmware/opal/core" 664 depends on PPC64 && PPC_POWERNV 665 help 666 This option uses the MPIPL support in firmware to provide an 667 ELF core of OPAL memory after a crash. The ELF core is exported 668 as /sys/firmware/opal/core file which is helpful in debugging 669 OPAL crashes using GDB. 670 671config IRQ_ALL_CPUS 672 bool "Distribute interrupts on all CPUs by default" 673 depends on SMP 674 help 675 This option gives the kernel permission to distribute IRQs across 676 multiple CPUs. Saying N here will route all IRQs to the first 677 CPU. Generally saying Y is safe, although some problems have been 678 reported with SMP Power Macintoshes with this option enabled. 679 680config NUMA 681 bool "NUMA Memory Allocation and Scheduler Support" 682 depends on PPC64 && SMP 683 default y if PPC_PSERIES || PPC_POWERNV 684 select USE_PERCPU_NUMA_NODE_ID 685 help 686 Enable NUMA (Non-Uniform Memory Access) support. 687 688 The kernel will try to allocate memory used by a CPU on the 689 local memory controller of the CPU and add some more 690 NUMA awareness to the kernel. 691 692config NODES_SHIFT 693 int 694 default "8" if PPC64 695 default "4" 696 depends on NUMA 697 698config HAVE_MEMORYLESS_NODES 699 def_bool y 700 depends on NUMA 701 702config ARCH_SELECT_MEMORY_MODEL 703 def_bool y 704 depends on PPC64 705 706config ARCH_FLATMEM_ENABLE 707 def_bool y 708 depends on (PPC64 && !NUMA) || PPC32 709 710config ARCH_SPARSEMEM_ENABLE 711 def_bool y 712 depends on PPC64 713 select SPARSEMEM_VMEMMAP_ENABLE 714 715config ARCH_SPARSEMEM_DEFAULT 716 def_bool y 717 depends on PPC_BOOK3S_64 718 719config ILLEGAL_POINTER_VALUE 720 hex 721 # This is roughly half way between the top of user space and the bottom 722 # of kernel space, which seems about as good as we can get. 723 default 0x5deadbeef0000000 if PPC64 724 default 0 725 726config ARCH_MEMORY_PROBE 727 def_bool y 728 depends on MEMORY_HOTPLUG 729 730choice 731 prompt "Page size" 732 default PPC_64K_PAGES if PPC_BOOK3S_64 733 default PPC_4K_PAGES 734 help 735 Select the kernel logical page size. Increasing the page size 736 will reduce software overhead at each page boundary, allow 737 hardware prefetch mechanisms to be more effective, and allow 738 larger dma transfers increasing IO efficiency and reducing 739 overhead. However the utilization of memory will increase. 740 For example, each cached file will using a multiple of the 741 page size to hold its contents and the difference between the 742 end of file and the end of page is wasted. 743 744 Some dedicated systems, such as software raid serving with 745 accelerated calculations, have shown significant increases. 746 747 If you configure a 64 bit kernel for 64k pages but the 748 processor does not support them, then the kernel will simulate 749 them with 4k pages, loading them on demand, but with the 750 reduced software overhead and larger internal fragmentation. 751 For the 32 bit kernel, a large page option will not be offered 752 unless it is supported by the configured processor. 753 754 If unsure, choose 4K_PAGES. 755 756config PPC_4K_PAGES 757 bool "4k page size" 758 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 759 760config PPC_16K_PAGES 761 bool "16k page size" 762 depends on 44x || PPC_8xx 763 764config PPC_64K_PAGES 765 bool "64k page size" 766 depends on 44x || PPC_BOOK3S_64 767 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 768 769config PPC_256K_PAGES 770 bool "256k page size (Requires non-standard binutils settings)" 771 depends on 44x && !PPC_47x 772 help 773 Make the page size 256k. 774 775 The kernel will only be able to run applications that have been 776 compiled with '-zmax-page-size' set to 256K (the default is 64K) using 777 binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE 778 definition from 0x10000 to 0x40000 in older versions. 779 780endchoice 781 782config PAGE_SIZE_4KB 783 def_bool y 784 depends on PPC_4K_PAGES 785 786config PAGE_SIZE_16KB 787 def_bool y 788 depends on PPC_16K_PAGES 789 790config PAGE_SIZE_64KB 791 def_bool y 792 depends on PPC_64K_PAGES 793 794config PAGE_SIZE_256KB 795 def_bool y 796 depends on PPC_256K_PAGES 797 798config PPC_PAGE_SHIFT 799 int 800 default 18 if PPC_256K_PAGES 801 default 16 if PPC_64K_PAGES 802 default 14 if PPC_16K_PAGES 803 default 12 804 805config THREAD_SHIFT 806 int "Thread shift" if EXPERT 807 range 13 15 808 default "15" if PPC_256K_PAGES 809 default "14" if PPC64 810 default "13" 811 help 812 Used to define the stack size. The default is almost always what you 813 want. Only change this if you know what you are doing. 814 815config DATA_SHIFT_BOOL 816 bool "Set custom data alignment" 817 depends on ADVANCED_OPTIONS 818 depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE 819 depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \ 820 PPC_85xx 821 help 822 This option allows you to set the kernel data alignment. When 823 RAM is mapped by blocks, the alignment needs to fit the size and 824 number of possible blocks. The default should be OK for most configs. 825 826 Say N here unless you know what you are doing. 827 828config DATA_SHIFT 829 int "Data shift" if DATA_SHIFT_BOOL 830 default 24 if STRICT_KERNEL_RWX && PPC64 831 range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 832 range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 833 range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx 834 default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 835 default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 836 default 23 if STRICT_KERNEL_RWX && PPC_8xx 837 default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA 838 default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx 839 default 24 if STRICT_KERNEL_RWX && PPC_85xx 840 default PPC_PAGE_SHIFT 841 help 842 On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. 843 Smaller is the alignment, greater is the number of necessary DBATs. 844 845 On 8xx, large pages (512kb or 8M) are used to map kernel linear 846 memory. Aligning to 8M reduces TLB misses as only 8M pages are used 847 in that case. If PIN_TLB is selected, it must be aligned to 8M as 848 8M pages will be pinned. 849 850config ARCH_FORCE_MAX_ORDER 851 int "Maximum zone order" 852 range 8 9 if PPC64 && PPC_64K_PAGES 853 default "9" if PPC64 && PPC_64K_PAGES 854 range 13 13 if PPC64 && !PPC_64K_PAGES 855 default "13" if PPC64 && !PPC_64K_PAGES 856 range 9 64 if PPC32 && PPC_16K_PAGES 857 default "9" if PPC32 && PPC_16K_PAGES 858 range 7 64 if PPC32 && PPC_64K_PAGES 859 default "7" if PPC32 && PPC_64K_PAGES 860 range 5 64 if PPC32 && PPC_256K_PAGES 861 default "5" if PPC32 && PPC_256K_PAGES 862 range 11 64 863 default "11" 864 help 865 The kernel memory allocator divides physically contiguous memory 866 blocks into "zones", where each zone is a power of two number of 867 pages. This option selects the largest power of two that the kernel 868 keeps in the memory allocator. If you need to allocate very large 869 blocks of physically contiguous memory, then you may need to 870 increase this value. 871 872 This config option is actually maximum order plus one. For example, 873 a value of 11 means that the largest free memory block is 2^10 pages. 874 875 The page size is not necessarily 4KB. For example, on 64-bit 876 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep 877 this in mind when choosing a value for this option. 878 879config PPC_SUBPAGE_PROT 880 bool "Support setting protections for 4k subpages (subpage_prot syscall)" 881 default n 882 depends on PPC_64S_HASH_MMU && PPC_64K_PAGES 883 help 884 This option adds support for system call to allow user programs 885 to set access permissions (read/write, readonly, or no access) 886 on the 4k subpages of each 64k page. 887 888 If unsure, say N here. 889 890config PPC_PROT_SAO_LPAR 891 bool "Support PROT_SAO mappings in LPARs" 892 depends on PPC_BOOK3S_64 893 help 894 This option adds support for PROT_SAO mappings from userspace 895 inside LPARs on supported CPUs. 896 897 This may cause issues when performing guest migration from 898 a CPU that supports SAO to one that does not. 899 900 If unsure, say N here. 901 902config PPC_COPRO_BASE 903 bool 904 905config SCHED_SMT 906 bool "SMT (Hyperthreading) scheduler support" 907 depends on PPC64 && SMP 908 help 909 SMT scheduler support improves the CPU scheduler's decision making 910 when dealing with POWER5 cpus at a cost of slightly increased 911 overhead in some places. If unsure say N here. 912 913config PPC_DENORMALISATION 914 bool "PowerPC denormalisation exception handling" 915 depends on PPC_BOOK3S_64 916 default "y" if PPC_POWERNV 917 help 918 Add support for handling denormalisation of single precision 919 values. Useful for bare metal only. If unsure say Y here. 920 921config CMDLINE 922 string "Initial kernel command string" 923 default "" 924 help 925 On some platforms, there is currently no way for the boot loader to 926 pass arguments to the kernel. For these platforms, you can supply 927 some command-line options at build time by entering them here. In 928 most cases you will need to specify the root device here. 929 930choice 931 prompt "Kernel command line type" if CMDLINE != "" 932 default CMDLINE_FROM_BOOTLOADER 933 934config CMDLINE_FROM_BOOTLOADER 935 bool "Use bootloader kernel arguments if available" 936 help 937 Uses the command-line options passed by the boot loader. If 938 the boot loader doesn't provide any, the default kernel command 939 string provided in CMDLINE will be used. 940 941config CMDLINE_EXTEND 942 bool "Extend bootloader kernel arguments" 943 help 944 The command-line arguments provided by the boot loader will be 945 appended to the default kernel command string. 946 947config CMDLINE_FORCE 948 bool "Always use the default kernel command string" 949 help 950 Always use the default kernel command string, even if the boot 951 loader passes other arguments to the kernel. 952 This is useful if you cannot or don't want to change the 953 command-line options your boot loader passes to the kernel. 954 955endchoice 956 957config EXTRA_TARGETS 958 string "Additional default image types" 959 help 960 List additional targets to be built by the bootwrapper here (separated 961 by spaces). This is useful for targets that depend of device tree 962 files in the .dts directory. 963 964 Targets in this list will be build as part of the default build 965 target, or when the user does a 'make zImage' or a 966 'make zImage.initrd'. 967 968 If unsure, leave blank 969 970config ARCH_WANTS_FREEZER_CONTROL 971 def_bool y 972 depends on ADB_PMU 973 974source "kernel/power/Kconfig" 975 976config PPC_MEM_KEYS 977 prompt "PowerPC Memory Protection Keys" 978 def_bool y 979 depends on PPC_BOOK3S_64 980 depends on PPC_64S_HASH_MMU 981 select ARCH_USES_HIGH_VMA_FLAGS 982 select ARCH_HAS_PKEYS 983 help 984 Memory Protection Keys provides a mechanism for enforcing 985 page-based protections, but without requiring modification of the 986 page tables when an application changes protection domains. 987 988 For details, see Documentation/core-api/protection-keys.rst 989 990 If unsure, say y. 991 992config PPC_SECURE_BOOT 993 prompt "Enable secure boot support" 994 bool 995 depends on PPC_POWERNV || PPC_PSERIES 996 depends on IMA_ARCH_POLICY 997 imply IMA_SECURE_AND_OR_TRUSTED_BOOT 998 help 999 Systems with firmware secure boot enabled need to define security 1000 policies to extend secure boot to the OS. This config allows a user 1001 to enable OS secure boot on systems that have firmware support for 1002 it. If in doubt say N. 1003 1004config PPC_SECVAR_SYSFS 1005 bool "Enable sysfs interface for POWER secure variables" 1006 default y 1007 depends on PPC_SECURE_BOOT 1008 depends on SYSFS 1009 help 1010 POWER secure variables are managed and controlled by firmware. 1011 These variables are exposed to userspace via sysfs to enable 1012 read/write operations on these variables. Say Y if you have 1013 secure boot enabled and want to expose variables to userspace. 1014 1015config PPC_RTAS_FILTER 1016 bool "Enable filtering of RTAS syscalls" 1017 default y 1018 depends on PPC_RTAS 1019 help 1020 The RTAS syscall API has security issues that could be used to 1021 compromise system integrity. This option enforces restrictions on the 1022 RTAS calls and arguments passed by userspace programs to mitigate 1023 these issues. 1024 1025 Say Y unless you know what you are doing and the filter is causing 1026 problems for you. 1027 1028endmenu 1029 1030config ISA_DMA_API 1031 bool 1032 default PCI 1033 1034menu "Bus options" 1035 1036config ISA 1037 bool "Support for ISA-bus hardware" 1038 depends on PPC_CHRP 1039 select PPC_I8259 1040 help 1041 Find out whether you have ISA slots on your motherboard. ISA is the 1042 name of a bus system, i.e. the way the CPU talks to the other stuff 1043 inside your box. If you have an Apple machine, say N here; if you 1044 have an IBM RS/6000 or pSeries machine, say Y. If you have an 1045 embedded board, consult your board documentation. 1046 1047config GENERIC_ISA_DMA 1048 bool 1049 depends on ISA_DMA_API 1050 default y 1051 1052config PPC_INDIRECT_PCI 1053 bool 1054 depends on PCI 1055 default y if 40x || 44x 1056 1057config SBUS 1058 bool 1059 1060config FSL_SOC 1061 bool 1062 1063config FSL_PCI 1064 bool 1065 select ARCH_HAS_DMA_SET_MASK 1066 select PPC_INDIRECT_PCI 1067 select PCI_QUIRKS 1068 1069config FSL_PMC 1070 bool 1071 default y 1072 depends on SUSPEND && (PPC_85xx || PPC_86xx) 1073 help 1074 Freescale MPC85xx/MPC86xx power management controller support 1075 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c 1076 1077config PPC4xx_CPM 1078 bool 1079 default y 1080 depends on SUSPEND && (44x || 40x) 1081 help 1082 PPC4xx Clock Power Management (CPM) support (suspend/resume). 1083 It also enables support for two different idle states (idle-wait 1084 and idle-doze). 1085 1086config 4xx_SOC 1087 bool 1088 1089config FSL_LBC 1090 bool "Freescale Local Bus support" 1091 help 1092 Enables reporting of errors from the Freescale local bus 1093 controller. Also contains some common code used by 1094 drivers for specific local bus peripherals. 1095 1096config FSL_GTM 1097 bool 1098 depends on PPC_83xx || QUICC_ENGINE || CPM2 1099 help 1100 Freescale General-purpose Timers support 1101 1102config PCI_8260 1103 bool 1104 depends on PCI && 8260 1105 select PPC_INDIRECT_PCI 1106 default y 1107 1108config FSL_RIO 1109 bool "Freescale Embedded SRIO Controller support" 1110 depends on RAPIDIO = y && HAVE_RAPIDIO 1111 default "n" 1112 help 1113 Include support for RapidIO controller on Freescale embedded 1114 processors (MPC8548, MPC8641, etc). 1115 1116endmenu 1117 1118config NONSTATIC_KERNEL 1119 bool 1120 1121menu "Advanced setup" 1122 depends on PPC32 1123 1124config ADVANCED_OPTIONS 1125 bool "Prompt for advanced kernel configuration options" 1126 help 1127 This option will enable prompting for a variety of advanced kernel 1128 configuration options. These options can cause the kernel to not 1129 work if they are set incorrectly, but can be used to optimize certain 1130 aspects of kernel memory management. 1131 1132 Unless you know what you are doing, say N here. 1133 1134comment "Default settings for advanced configuration options are used" 1135 depends on !ADVANCED_OPTIONS 1136 1137config LOWMEM_SIZE_BOOL 1138 bool "Set maximum low memory" 1139 depends on ADVANCED_OPTIONS 1140 help 1141 This option allows you to set the maximum amount of memory which 1142 will be used as "low memory", that is, memory which the kernel can 1143 access directly, without having to set up a kernel virtual mapping. 1144 This can be useful in optimizing the layout of kernel virtual 1145 memory. 1146 1147 Say N here unless you know what you are doing. 1148 1149config LOWMEM_SIZE 1150 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL 1151 default "0x30000000" 1152 1153config LOWMEM_CAM_NUM_BOOL 1154 bool "Set number of CAMs to use to map low memory" 1155 depends on ADVANCED_OPTIONS && PPC_85xx 1156 help 1157 This option allows you to set the maximum number of CAM slots that 1158 will be used to map low memory. There are a limited number of slots 1159 available and even more limited number that will fit in the L1 MMU. 1160 However, using more entries will allow mapping more low memory. This 1161 can be useful in optimizing the layout of kernel virtual memory. 1162 1163 Say N here unless you know what you are doing. 1164 1165config LOWMEM_CAM_NUM 1166 depends on PPC_85xx 1167 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL 1168 default 3 if !STRICT_KERNEL_RWX 1169 default 9 if DATA_SHIFT >= 24 1170 default 12 if DATA_SHIFT >= 22 1171 default 15 1172 1173config DYNAMIC_MEMSTART 1174 bool "Enable page aligned dynamic load address for kernel" 1175 depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x) 1176 select NONSTATIC_KERNEL 1177 help 1178 This option enables the kernel to be loaded at any page aligned 1179 physical address. The kernel creates a mapping from KERNELBASE to 1180 the address where the kernel is loaded. The page size here implies 1181 the TLB page size of the mapping for kernel on the particular platform. 1182 Please refer to the init code for finding the TLB page size. 1183 1184 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE 1185 kernel image, where the only restriction is the page aligned kernel 1186 load address. When this option is enabled, the compile time physical 1187 address CONFIG_PHYSICAL_START is ignored. 1188 1189 This option is overridden by CONFIG_RELOCATABLE 1190 1191config PAGE_OFFSET_BOOL 1192 bool "Set custom page offset address" 1193 depends on ADVANCED_OPTIONS 1194 help 1195 This option allows you to set the kernel virtual address at which 1196 the kernel will map low memory. This can be useful in optimizing 1197 the virtual memory layout of the system. 1198 1199 Say N here unless you know what you are doing. 1200 1201config PAGE_OFFSET 1202 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL 1203 default "0xc0000000" 1204 1205config KERNEL_START_BOOL 1206 bool "Set custom kernel base address" 1207 depends on ADVANCED_OPTIONS 1208 help 1209 This option allows you to set the kernel virtual address at which 1210 the kernel will be loaded. Normally this should match PAGE_OFFSET 1211 however there are times (like kdump) that one might not want them 1212 to be the same. 1213 1214 Say N here unless you know what you are doing. 1215 1216config KERNEL_START 1217 hex "Virtual address of kernel base" if KERNEL_START_BOOL 1218 default PAGE_OFFSET if PAGE_OFFSET_BOOL 1219 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL 1220 default "0xc0000000" 1221 1222config PHYSICAL_START_BOOL 1223 bool "Set physical address where the kernel is loaded" 1224 depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx 1225 help 1226 This gives the physical address where the kernel is loaded. 1227 1228 Say N here unless you know what you are doing. 1229 1230config PHYSICAL_START 1231 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL 1232 default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL 1233 default "0x00000000" 1234 1235config PHYSICAL_ALIGN 1236 hex 1237 default "0x04000000" if PPC_85xx 1238 help 1239 This value puts the alignment restrictions on physical address 1240 where kernel is loaded and run from. Kernel is compiled for an 1241 address which meets above alignment restriction. 1242 1243config TASK_SIZE_BOOL 1244 bool "Set custom user task size" 1245 depends on ADVANCED_OPTIONS 1246 help 1247 This option allows you to set the amount of virtual address space 1248 allocated to user tasks. This can be useful in optimizing the 1249 virtual memory layout of the system. 1250 1251 Say N here unless you know what you are doing. 1252 1253config TASK_SIZE 1254 hex "Size of user task space" if TASK_SIZE_BOOL 1255 default "0x80000000" if PPC_8xx 1256 default "0xb0000000" if PPC_BOOK3S_32 1257 default "0xc0000000" 1258endmenu 1259 1260if PPC64 1261# This value must have zeroes in the bottom 60 bits otherwise lots will break 1262config PAGE_OFFSET 1263 hex 1264 default "0xc000000000000000" 1265config KERNEL_START 1266 hex 1267 default "0xc000000000000000" 1268config PHYSICAL_START 1269 hex 1270 default "0x00000000" 1271endif 1272 1273config PPC_LIB_RHEAP 1274 bool 1275 1276source "arch/powerpc/kvm/Kconfig" 1277 1278source "kernel/livepatch/Kconfig" 1279