Kconfig

   1# SPDX-License-Identifier: GPL-2.0
   2source "arch/powerpc/platforms/Kconfig.cputype"
   3
   4config CC_HAS_ELFV2
   5	def_bool PPC64 && $(cc-option, -mabi=elfv2)
   6
   7config CC_HAS_PREFIXED
   8	def_bool PPC64 && $(cc-option, -mcpu=power10 -mprefixed)
   9
  10config CC_HAS_PCREL
  11	# Clang has a bug (https://github.com/llvm/llvm-project/issues/62372)
  12	# where pcrel code is not generated if -msoft-float, -mno-altivec, or
  13	# -mno-vsx options are also given. Without these options, fp/vec
  14	# instructions are generated from regular kernel code. So Clang can't
  15	# do pcrel yet.
  16	def_bool PPC64 && CC_IS_GCC && $(cc-option, -mcpu=power10 -mpcrel)
  17
  18config 32BIT
  19	bool
  20	default y if PPC32
  21
  22config 64BIT
  23	bool
  24	default y if PPC64
  25
  26config LIVEPATCH_64
  27	def_bool PPC64
  28	depends on LIVEPATCH
  29
  30config MMU
  31	bool
  32	default y
  33
  34config ARCH_MMAP_RND_BITS_MAX
  35	# On Book3S 64, the default virtual address space for 64-bit processes
  36	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
  37	# 32T of address space (2^45), which should ensure a reasonable gap
  38	# between bottom-up and top-down allocations for applications that
  39	# consume "normal" amounts of address space. Book3S 64 only supports 64K
  40	# and 4K page sizes.
  41	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
  42	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
  43	#
  44	# On all other 64-bit platforms (currently only Book3E), the virtual
  45	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
  46	# of address space (2^44). Only 4K page sizes are supported.
  47	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
  48	#
  49	# For 32-bit, use the compat values, as they're the same.
  50	default ARCH_MMAP_RND_COMPAT_BITS_MAX
  51
  52config ARCH_MMAP_RND_BITS_MIN
  53	# Allow randomisation to consume up to 1GB of address space (2^30).
  54	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
  55	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
  56	#
  57	# For 32-bit, use the compat values, as they're the same.
  58	default ARCH_MMAP_RND_COMPAT_BITS_MIN
  59
  60config ARCH_MMAP_RND_COMPAT_BITS_MAX
  61	# Total virtual address space for 32-bit processes is 2^31 (2GB).
  62	# Allow randomisation to consume up to 512MB of address space (2^29).
  63	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
  64	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
  65	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
  66	default 17			# 17 = 29 (512MB) - 12 (4K)
  67
  68config ARCH_MMAP_RND_COMPAT_BITS_MIN
  69	# Total virtual address space for 32-bit processes is 2^31 (2GB).
  70	# Allow randomisation to consume up to 8MB of address space (2^23).
  71	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
  72	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
  73	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
  74	default 11			# 11 = 23 (8MB) - 12 (4K)
  75
  76config NR_IRQS
  77	int "Number of virtual interrupt numbers"
  78	range 32 1048576
  79	default "512"
  80	help
  81	  This defines the number of virtual interrupt numbers the kernel
  82	  can manage. Virtual interrupt numbers are what you see in
  83	  /proc/interrupts. If you configure your system to have too few,
  84	  drivers will fail to load or worse - handle with care.
  85
  86config NMI_IPI
  87	bool
  88	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
  89	default y
  90
  91config PPC_WATCHDOG
  92	bool
  93	depends on HARDLOCKUP_DETECTOR_ARCH
  94	default y
  95	help
  96	  This is a placeholder when the powerpc hardlockup detector
  97	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
  98	  selected via the generic lockup detector menu which is why we
  99	  have no standalone config option for it here.
 100
 101config STACKTRACE_SUPPORT
 102	bool
 103	default y
 104
 105config LOCKDEP_SUPPORT
 106	bool
 107	default y
 108
 109config GENERIC_LOCKBREAK
 110	bool
 111	default y
 112	depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS
 113
 114config GENERIC_HWEIGHT
 115	bool
 116	default y
 117
 118config PPC
 119	bool
 120	default y
 121	#
 122	# Please keep this list sorted alphabetically.
 123	#
 124	select ARCH_32BIT_OFF_T if PPC32
 125	select ARCH_NEEDS_DEFER_KASAN		if PPC_RADIX_MMU
 126	select ARCH_DISABLE_KASAN_INLINE	if PPC_RADIX_MMU
 127	select ARCH_DMA_DEFAULT_COHERENT	if !NOT_COHERENT_CACHE
 128	select ARCH_ENABLE_MEMORY_HOTPLUG
 129	select ARCH_ENABLE_MEMORY_HOTREMOVE
 130	select ARCH_HAS_COPY_MC			if PPC64
 131	select ARCH_HAS_CURRENT_STACK_POINTER
 132	select ARCH_HAS_DEBUG_VIRTUAL
 133	select ARCH_HAS_DEBUG_VM_PGTABLE
 134	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
 135	select ARCH_HAS_DEVMEM_IS_ALLOWED
 136	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
 137	select ARCH_HAS_DMA_OPS			if PPC64
 138	select ARCH_HAS_FORTIFY_SOURCE
 139	select ARCH_HAS_GCOV_PROFILE_ALL
 140	select ARCH_HAS_GIGANTIC_PAGE		if ARCH_SUPPORTS_HUGETLBFS
 141	select ARCH_HAS_KCOV
 142	select ARCH_HAS_KERNEL_FPU_SUPPORT	if PPC64 && PPC_FPU
 143	select ARCH_HAS_MEMBARRIER_CALLBACKS
 144	select ARCH_HAS_MEMBARRIER_SYNC_CORE
 145	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
 146	select ARCH_HAS_MMIOWB			if PPC64
 147	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
 148	select ARCH_HAS_PHYS_TO_DMA
 149	select ARCH_HAS_PMEM_API
 150	select ARCH_HAS_PREEMPT_LAZY
 151	select ARCH_HAS_PTDUMP
 152	select ARCH_HAS_PTE_SPECIAL
 153	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
 154	select ARCH_HAS_SET_MEMORY
 155	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx) && !HIBERNATION
 156	select ARCH_HAS_STRICT_KERNEL_RWX	if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
 157	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX
 158	select ARCH_HAS_SYSCALL_WRAPPER		if !SPU_BASE && !COMPAT
 159	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
 160	select ARCH_HAS_UACCESS_FLUSHCACHE
 161	select ARCH_HAS_UBSAN
 162	select ARCH_HAS_VDSO_ARCH_DATA
 163	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 164	select ARCH_HAVE_EXTRA_ELF_NOTES        if SPU_BASE
 165	select ARCH_KEEP_MEMBLOCK
 166	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE	if PPC_RADIX_MMU
 167	select ARCH_MIGHT_HAVE_PC_PARPORT
 168	select ARCH_MIGHT_HAVE_PC_SERIO
 169	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
 170	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
 171	select ARCH_SPLIT_ARG64			if PPC32
 172	select ARCH_STACKWALK
 173	select ARCH_SUPPORTS_ATOMIC_RMW
 174	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx
 175	select ARCH_SUPPORTS_SCHED_MC		if SMP
 176	select ARCH_SUPPORTS_SCHED_SMT		if PPC64 && SMP
 177	select SCHED_MC				if ARCH_SUPPORTS_SCHED_MC
 178	select ARCH_USE_BUILTIN_BSWAP
 179	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
 180	select ARCH_USE_MEMTEST
 181	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
 182	select ARCH_WANT_DEFAULT_BPF_JIT
 183	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
 184	select ARCH_WANT_IPC_PARSE_VERSION
 185	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
 186	select ARCH_WANT_LD_ORPHAN_WARN
 187	select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP	if PPC_RADIX_MMU
 188	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
 189	select ARCH_WEAK_RELEASE_ACQUIRE
 190	select BINFMT_ELF
 191	select BUILDTIME_TABLE_SORT
 192	select CLONE_BACKWARDS
 193	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
 194	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
 195	select DMA_OPS_BYPASS			if PPC64
 196	select DYNAMIC_FTRACE			if FUNCTION_TRACER
 197	select EDAC_ATOMIC_SCRUB
 198	select EDAC_SUPPORT
 199	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 200	select FUNCTION_ALIGNMENT_4B
 201	select GENERIC_ATOMIC64			if PPC32
 202	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
 203	select GENERIC_CMOS_UPDATE
 204	select GENERIC_CPU_AUTOPROBE
 205	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
 206	select GENERIC_EARLY_IOREMAP
 207	select GENERIC_GETTIMEOFDAY
 208	select GENERIC_IDLE_POLL_SETUP
 209	select GENERIC_IOREMAP
 210	select GENERIC_IRQ_SHOW
 211	select GENERIC_IRQ_SHOW_LEVEL
 212	select GENERIC_PCI_IOMAP		if PCI
 213	select GENERIC_SMP_IDLE_THREAD
 214	select GENERIC_TIME_VSYSCALL
 215	select HAS_IOPORT			if PCI
 216	select HAVE_ARCH_AUDITSYSCALL
 217	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
 218	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
 219	select HAVE_ARCH_JUMP_LABEL
 220	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 221	select HAVE_ARCH_KASAN			if PPC32 && PAGE_SHIFT <= 14
 222	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
 223	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
 224	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
 225	select HAVE_ARCH_KCSAN
 226	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
 227	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
 228	select HAVE_ARCH_WITHIN_STACK_FRAMES
 229	select HAVE_ARCH_KGDB
 230	select HAVE_ARCH_MMAP_RND_BITS
 231	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
 232	select HAVE_ARCH_NVRAM_OPS
 233	select HAVE_ARCH_SECCOMP_FILTER
 234	select HAVE_ARCH_TRACEHOOK
 235	select HAVE_ASM_MODVERSIONS
 236	select HAVE_CONTEXT_TRACKING_USER
 237	select HAVE_C_RECORDMCOUNT
 238	select HAVE_DEBUG_KMEMLEAK
 239	select HAVE_DEBUG_STACKOVERFLOW
 240	select HAVE_DYNAMIC_FTRACE
 241	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 242	select HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS if PPC_FTRACE_OUT_OF_LINE || (PPC32 && ARCH_USING_PATCHABLE_FUNCTION_ENTRY)
 243	select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS if HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS
 244	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 245	select HAVE_EBPF_JIT
 246	select HAVE_EFFICIENT_UNALIGNED_ACCESS
 247	select HAVE_GUP_FAST
 248	select HAVE_FTRACE_GRAPH_FUNC
 249	select HAVE_FTRACE_REGS_HAVING_PT_REGS
 250	select HAVE_FUNCTION_ARG_ACCESS_API
 251	select HAVE_FUNCTION_DESCRIPTORS	if PPC64_ELF_ABI_V1
 252	select HAVE_FUNCTION_ERROR_INJECTION
 253	select HAVE_FUNCTION_GRAPH_FREGS
 254	select HAVE_FUNCTION_GRAPH_TRACER
 255	select HAVE_FUNCTION_TRACER		if !COMPILE_TEST && (PPC64 || (PPC32 && CC_IS_GCC))
 256	select HAVE_GCC_PLUGINS
 257	select HAVE_GENERIC_VDSO
 258	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
 259	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
 260	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 261	select HAVE_IOREMAP_PROT
 262	select HAVE_IRQ_TIME_ACCOUNTING
 263	select HAVE_KERNEL_GZIP
 264	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
 265	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
 266	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
 267	select HAVE_KPROBES
 268	select HAVE_KPROBES_ON_FTRACE
 269	select HAVE_KRETPROBES
 270	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if HAVE_OBJTOOL_MCOUNT && (!ARCH_USING_PATCHABLE_FUNCTION_ENTRY || (!CC_IS_GCC || GCC_VERSION >= 110100))
 271	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
 272	select HAVE_MOD_ARCH_SPECIFIC
 273	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
 274	select HAVE_OPTPROBES
 275	select HAVE_OBJTOOL			if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 276	select HAVE_OBJTOOL_MCOUNT		if HAVE_OBJTOOL
 277	select HAVE_PERF_EVENTS
 278	select HAVE_PERF_EVENTS_NMI		if PPC64
 279	select HAVE_PERF_REGS
 280	select HAVE_PERF_USER_STACK_DUMP
 281	select HAVE_PREEMPT_DYNAMIC_KEY
 282	select HAVE_RETHOOK			if KPROBES
 283	select HAVE_REGS_AND_STACK_ACCESS_API
 284	select HAVE_RELIABLE_STACKTRACE
 285	select HAVE_RSEQ
 286	select HAVE_SAMPLE_FTRACE_DIRECT	if HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
 287	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI	if HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
 288	select HAVE_SETUP_PER_CPU_AREA		if PPC64
 289	select HAVE_SOFTIRQ_ON_OWN_STACK
 290	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,$(m32-flag) -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 -mstack-protector-guard-offset=0)
 291	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,$(m64-flag) -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 -mstack-protector-guard-offset=0)
 292	select HAVE_STATIC_CALL			if PPC32
 293	select HAVE_STATIC_CALL_INLINE		if PPC32
 294	select HAVE_SYSCALL_TRACEPOINTS
 295	select HAVE_VIRT_CPU_ACCOUNTING
 296	select HAVE_VIRT_CPU_ACCOUNTING_GEN
 297	select HOTPLUG_SMT			if HOTPLUG_CPU
 298	select SMT_NUM_THREADS_DYNAMIC
 299	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
 300	select IOMMU_HELPER			if PPC64
 301	select IRQ_DOMAIN
 302	select IRQ_FORCED_THREADING
 303	select KASAN_VMALLOC			if KASAN && EXECMEM
 304	select LOCK_MM_AND_FIND_VMA
 305	select MMU_GATHER_PAGE_SIZE
 306	select MMU_GATHER_RCU_TABLE_FREE
 307	select MMU_GATHER_MERGE_VMAS
 308	select MMU_LAZY_TLB_SHOOTDOWN		if PPC_BOOK3S_64
 309	select MODULES_USE_ELF_RELA
 310	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
 311	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
 312	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
 313	select NEED_SG_DMA_LENGTH
 314	select OF
 315	select OF_EARLY_FLATTREE
 316	select OLD_SIGACTION			if PPC32
 317	select OLD_SIGSUSPEND
 318	select PCI_DOMAINS			if PCI
 319	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
 320	select PCI_SYSCALL			if PCI
 321	select PPC_DAWR				if PPC64
 322	select RTC_LIB
 323	select SPARSE_IRQ
 324	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
 325	select SYSCTL_EXCEPTION_TRACE
 326	select THREAD_INFO_IN_TASK
 327	select TRACE_IRQFLAGS_SUPPORT
 328	select VDSO_GETRANDOM
 329	#
 330	# Please keep this list sorted alphabetically.
 331	#
 332
 333config PPC_BARRIER_NOSPEC
 334	bool
 335	default y
 336	depends on PPC_BOOK3S_64 || PPC_E500
 337
 338config PPC_HAS_LBARX_LHARX
 339	bool
 340
 341config EARLY_PRINTK
 342	bool
 343	default y
 344
 345config PANIC_TIMEOUT
 346	int
 347	default 180
 348
 349config COMPAT
 350	bool "Enable support for 32bit binaries"
 351	depends on PPC64
 352	default y if !CPU_LITTLE_ENDIAN
 353	select ARCH_WANT_OLD_COMPAT_IPC
 354	select COMPAT_OLD_SIGACTION
 355
 356config SCHED_OMIT_FRAME_POINTER
 357	bool
 358	default y
 359
 360config ARCH_MAY_HAVE_PC_FDC
 361	bool
 362	default PCI
 363
 364config PPC_UDBG_16550
 365	bool
 366
 367config GENERIC_TBSYNC
 368	bool
 369	default y if PPC32 && SMP
 370
 371config AUDIT_ARCH
 372	bool
 373	default y
 374
 375config GENERIC_BUG
 376	bool
 377	default y
 378	depends on BUG
 379
 380config GENERIC_BUG_RELATIVE_POINTERS
 381	def_bool y
 382	depends on GENERIC_BUG
 383
 384config SYS_SUPPORTS_APM_EMULATION
 385	default y if PMAC_APM_EMU
 386	bool
 387
 388config EPAPR_BOOT
 389	bool
 390	help
 391	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
 392
 393config DEFAULT_UIMAGE
 394	bool
 395	help
 396	  Used to allow a board to specify it wants a uImage built by default
 397
 398config ARCH_HIBERNATION_POSSIBLE
 399	bool
 400	default y
 401
 402config ARCH_SUSPEND_POSSIBLE
 403	def_bool y
 404	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 405		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 406		   || 44x
 407
 408config ARCH_SUSPEND_NONZERO_CPU
 409	def_bool y
 410	depends on PPC_POWERNV || PPC_PSERIES
 411
 412config ARCH_HAS_ADD_PAGES
 413	def_bool y
 414	depends on ARCH_ENABLE_MEMORY_HOTPLUG
 415
 416config PPC_DCR_NATIVE
 417	bool
 418
 419config PPC_DCR
 420	bool
 421	depends on PPC_DCR_NATIVE
 422	default y
 423
 424config PPC_PCI_OF_BUS_MAP
 425	bool "Use pci_to_OF_bus_map (deprecated)"
 426	depends on PPC32
 427	depends on PPC_PMAC || PPC_CHRP
 428	help
 429	  This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which
 430	  restricts the system to only having 256 PCI buses. On CHRP it also causes
 431	  the "pci-OF-bus-map" property to be created in the device tree.
 432
 433	  If unsure, say "N".
 434
 435config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
 436	depends on PPC32
 437	depends on !PPC_PCI_OF_BUS_MAP
 438	bool "Assign PCI bus numbers from zero individually for each PCI domain"
 439	default y
 440	help
 441	  By default on PPC32 were PCI bus numbers unique across all PCI domains.
 442	  So system could have only 256 PCI buses independently of available
 443	  PCI domains. When this option is enabled then PCI bus numbers are
 444	  PCI domain dependent and each PCI controller on own domain can have
 445	  256 PCI buses, like it is on other Linux architectures.
 446
 447config ARCH_SUPPORTS_UPROBES
 448	def_bool y
 449
 450config PPC_ADV_DEBUG_REGS
 451	bool
 452	depends on BOOKE
 453	default y
 454
 455config PPC_ADV_DEBUG_IACS
 456	int
 457	depends on PPC_ADV_DEBUG_REGS
 458	default 4 if 44x
 459	default 2
 460
 461config PPC_ADV_DEBUG_DACS
 462	int
 463	depends on PPC_ADV_DEBUG_REGS
 464	default 2
 465
 466config PPC_ADV_DEBUG_DVCS
 467	int
 468	depends on PPC_ADV_DEBUG_REGS
 469	default 2 if 44x
 470	default 0
 471
 472config PPC_ADV_DEBUG_DAC_RANGE
 473	bool
 474	depends on PPC_ADV_DEBUG_REGS && 44x
 475	default y
 476
 477config PPC_DAWR
 478	bool
 479
 480config PGTABLE_LEVELS
 481	int
 482	default 2 if !PPC64
 483	default 4
 484
 485source "arch/powerpc/sysdev/Kconfig"
 486source "arch/powerpc/platforms/Kconfig"
 487
 488menu "Kernel options"
 489
 490config HIGHMEM
 491	bool "High memory support"
 492	depends on PPC32
 493	select KMAP_LOCAL
 494
 495source "kernel/Kconfig.hz"
 496
 497config MATH_EMULATION
 498	bool "Math emulation"
 499	depends on 44x || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
 500	select PPC_FPU_REGS
 501	help
 502	  Some PowerPC chips designed for embedded applications do not have
 503	  a floating-point unit and therefore do not implement the
 504	  floating-point instructions in the PowerPC instruction set.  If you
 505	  say Y here, the kernel will include code to emulate a floating-point
 506	  unit, which will allow programs that use floating-point
 507	  instructions to run.
 508
 509	  This is also useful to emulate missing (optional) instructions
 510	  such as fsqrt on cores that do have an FPU but do not implement
 511	  them (such as Freescale BookE).
 512
 513choice
 514	prompt "Math emulation options"
 515	default MATH_EMULATION_FULL
 516	depends on MATH_EMULATION
 517
 518config MATH_EMULATION_FULL
 519	bool "Emulate all the floating point instructions"
 520	help
 521	  Select this option will enable the kernel to support to emulate
 522	  all the floating point instructions. If your SoC doesn't have
 523	  a FPU, you should select this.
 524
 525config MATH_EMULATION_HW_UNIMPLEMENTED
 526	bool "Just emulate the FPU unimplemented instructions"
 527	help
 528	  Select this if you know there does have a hardware FPU on your
 529	  SoC, but some floating point instructions are not implemented by that.
 530
 531endchoice
 532
 533config PPC_TRANSACTIONAL_MEM
 534	bool "Transactional Memory support for POWERPC"
 535	depends on PPC_BOOK3S_64
 536	depends on SMP
 537	select ALTIVEC
 538	select VSX
 539	help
 540	  Support user-mode Transactional Memory on POWERPC.
 541
 542config PPC_UV
 543	bool "Ultravisor support"
 544	depends on KVM_BOOK3S_HV_POSSIBLE
 545	depends on DEVICE_PRIVATE
 546	default n
 547	help
 548	  This option paravirtualizes the kernel to run in POWER platforms that
 549	  supports the Protected Execution Facility (PEF). On such platforms,
 550	  the ultravisor firmware runs at a privilege level above the
 551	  hypervisor.
 552
 553	  If unsure, say "N".
 554
 555config LD_HEAD_STUB_CATCH
 556	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
 557	depends on PPC64
 558	help
 559	  Very large kernels can cause linker branch stubs to be generated by
 560	  code in head_64.S, which moves the head text sections out of their
 561	  specified location. This option can work around the problem.
 562
 563	  If unsure, say "N".
 564
 565config MPROFILE_KERNEL
 566	depends on PPC64_ELF_ABI_V2 && FUNCTION_TRACER
 567	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN
 568	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN
 569
 570config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 571	depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
 572	depends on $(cc-option,-fpatchable-function-entry=2)
 573	def_bool y if PPC32
 574	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
 575	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
 576
 577config PPC_FTRACE_OUT_OF_LINE
 578	def_bool PPC64 && ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 579	select ARCH_WANTS_PRE_LINK_VMLINUX
 580
 581config PPC_FTRACE_OUT_OF_LINE_NUM_RESERVE
 582	int "Number of ftrace out-of-line stubs to reserve within .text"
 583	depends on PPC_FTRACE_OUT_OF_LINE
 584	default 32768
 585	help
 586	  Number of stubs to reserve for use by ftrace. This space is
 587	  reserved within .text, and is distinct from any additional space
 588	  added at the end of .text before the final vmlinux link. Set to
 589	  zero to have stubs only be generated at the end of vmlinux (only
 590	  if the size of vmlinux is less than 32MB). Set to a higher value
 591	  if building vmlinux larger than 48MB.
 592
 593config HOTPLUG_CPU
 594	bool "Support for enabling/disabling CPUs"
 595	depends on SMP && (PPC_PSERIES || \
 596		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 597	help
 598	  Say Y here to be able to disable and re-enable individual
 599	  CPUs at runtime on SMP machines.
 600
 601	  Say N if you are unsure.
 602
 603config INTERRUPT_SANITIZE_REGISTERS
 604	bool "Clear gprs on interrupt arrival"
 605	depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER
 606	default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV
 607	help
 608	  Reduce the influence of user register state on interrupt handlers and
 609	  syscalls through clearing user state from registers before handling
 610	  the exception.
 611
 612config PPC_QUEUED_SPINLOCKS
 613	bool "Queued spinlocks" if EXPERT
 614	depends on SMP
 615	default PPC_BOOK3S_64
 616	help
 617	  Say Y here to use queued spinlocks which give better scalability and
 618	  fairness on large SMP and NUMA systems without harming single threaded
 619	  performance.
 620
 621config ARCH_CPU_PROBE_RELEASE
 622	def_bool y
 623	depends on HOTPLUG_CPU
 624
 625config PPC64_SUPPORTS_MEMORY_FAILURE
 626	bool "Add support for memory hwpoison"
 627	depends on PPC_BOOK3S_64
 628	default "y" if PPC_POWERNV
 629	select ARCH_SUPPORTS_MEMORY_FAILURE
 630
 631config ARCH_SUPPORTS_KEXEC
 632	def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
 633
 634config ARCH_SUPPORTS_KEXEC_FILE
 635	def_bool PPC64
 636
 637config ARCH_SUPPORTS_KEXEC_PURGATORY
 638	def_bool y
 639
 640config ARCH_SELECTS_KEXEC_FILE
 641	def_bool y
 642	depends on KEXEC_FILE
 643	select KEXEC_ELF
 644	select HAVE_IMA_KEXEC if IMA
 645
 646config PPC64_BIG_ENDIAN_ELF_ABI_V2
 647	# Option is available to BFD, but LLD does not support ELFv1 so this is
 648	# always true there.
 649	prompt "Build big-endian kernel using ELF ABI V2" if LD_IS_BFD && EXPERT
 650	def_bool y
 651	depends on PPC64 && CPU_BIG_ENDIAN
 652	depends on CC_HAS_ELFV2
 653	help
 654	  This builds the kernel image using the "Power Architecture 64-Bit ELF
 655	  V2 ABI Specification", which has a reduced stack overhead and faster
 656	  function calls. This internal kernel ABI option does not affect
 657          userspace compatibility.
 658
 659	  The V2 ABI is standard for 64-bit little-endian, but for big-endian
 660	  it is less well tested by kernel and toolchain. However some distros
 661	  build userspace this way, and it can produce a functioning kernel.
 662
 663config RELOCATABLE
 664	bool "Build a relocatable kernel"
 665	depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
 666	select NONSTATIC_KERNEL
 667	help
 668	  This builds a kernel image that is capable of running at the
 669	  location the kernel is loaded at. For ppc32, there is no any
 670	  alignment restrictions, and this feature is a superset of
 671	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 672	  16k-aligned base address. The kernel is linked as a
 673	  position-independent executable (PIE) and contains dynamic relocations
 674	  which are processed early in the bootup process.
 675
 676	  One use is for the kexec on panic case where the recovery kernel
 677	  must live at a different physical address than the primary
 678	  kernel.
 679
 680	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 681	  it has been loaded at and the compile time physical addresses
 682	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 683	  setting can still be useful to bootwrappers that need to know the
 684	  load address of the kernel (eg. u-boot/mkimage).
 685
 686config RANDOMIZE_BASE
 687	bool "Randomize the address of the kernel image"
 688	depends on PPC_85xx && FLATMEM
 689	depends on RELOCATABLE
 690	help
 691	  Randomizes the virtual address at which the kernel image is
 692	  loaded, as a security feature that deters exploit attempts
 693	  relying on knowledge of the location of kernel internals.
 694
 695	  If unsure, say Y.
 696
 697config RELOCATABLE_TEST
 698	bool "Test relocatable kernel"
 699	depends on (PPC64 && RELOCATABLE)
 700	help
 701	  This runs the relocatable kernel at the address it was initially
 702	  loaded at, which tends to be non-zero and therefore test the
 703	  relocation code.
 704
 705config ARCH_SUPPORTS_CRASH_DUMP
 706	def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
 707
 708config ARCH_DEFAULT_CRASH_DUMP
 709	bool
 710	default y if !PPC_BOOK3S_32
 711
 712config ARCH_SELECTS_CRASH_DUMP
 713	def_bool y
 714	depends on CRASH_DUMP
 715	select RELOCATABLE if PPC64 || 44x || PPC_85xx
 716
 717config ARCH_SUPPORTS_CRASH_HOTPLUG
 718	def_bool y
 719	depends on PPC64
 720
 721config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
 722	def_bool CRASH_RESERVE
 723
 724config FA_DUMP
 725	bool "Firmware-assisted dump"
 726	depends on CRASH_DUMP && PPC64 && (PPC_RTAS || PPC_POWERNV)
 727	help
 728	  A robust mechanism to get reliable kernel crash dump with
 729	  assistance from firmware. This approach does not use kexec,
 730	  instead firmware assists in booting the capture kernel
 731	  while preserving memory contents. Firmware-assisted dump
 732	  is meant to be a kdump replacement offering robustness and
 733	  speed not possible without system firmware assistance.
 734
 735	  If unsure, say "y". Only special kernels like petitboot may
 736	  need to say "N" here.
 737
 738config PRESERVE_FA_DUMP
 739	bool "Preserve Firmware-assisted dump"
 740	depends on PPC64 && PPC_POWERNV && !FA_DUMP
 741	help
 742	  On a kernel with FA_DUMP disabled, this option helps to preserve
 743	  crash data from a previously crash'ed kernel. Useful when the next
 744	  memory preserving kernel boot would process this crash data.
 745	  Petitboot kernel is the typical usecase for this option.
 746
 747config OPAL_CORE
 748	bool "Export OPAL memory as /sys/firmware/opal/core"
 749	depends on PPC64 && PPC_POWERNV
 750	help
 751	  This option uses the MPIPL support in firmware to provide an
 752	  ELF core of OPAL memory after a crash. The ELF core is exported
 753	  as /sys/firmware/opal/core file which is helpful in debugging
 754	  OPAL crashes using GDB.
 755
 756config IRQ_ALL_CPUS
 757	bool "Distribute interrupts on all CPUs by default"
 758	depends on SMP
 759	help
 760	  This option gives the kernel permission to distribute IRQs across
 761	  multiple CPUs.  Saying N here will route all IRQs to the first
 762	  CPU.  Generally saying Y is safe, although some problems have been
 763	  reported with SMP Power Macintoshes with this option enabled.
 764
 765config NUMA
 766	bool "NUMA Memory Allocation and Scheduler Support"
 767	depends on PPC64 && SMP
 768	default y if PPC_PSERIES || PPC_POWERNV
 769	select USE_PERCPU_NUMA_NODE_ID
 770	help
 771	  Enable NUMA (Non-Uniform Memory Access) support.
 772
 773	  The kernel will try to allocate memory used by a CPU on the
 774	  local memory controller of the CPU and add some more
 775	  NUMA awareness to the kernel.
 776
 777config NODES_SHIFT
 778	int
 779	default "8" if PPC64
 780	default "4"
 781	depends on NUMA
 782
 783config HAVE_MEMORYLESS_NODES
 784	def_bool y
 785	depends on NUMA
 786
 787config ARCH_SELECT_MEMORY_MODEL
 788	def_bool y
 789	depends on PPC64
 790
 791config ARCH_FLATMEM_ENABLE
 792	def_bool y
 793	depends on (PPC64 && !NUMA) || PPC32
 794
 795config ARCH_SPARSEMEM_ENABLE
 796	def_bool y
 797	depends on PPC64
 798	select SPARSEMEM_VMEMMAP_ENABLE
 799
 800config ARCH_SPARSEMEM_DEFAULT
 801	def_bool y
 802	depends on PPC_BOOK3S_64
 803
 804config ILLEGAL_POINTER_VALUE
 805	hex
 806	# This is roughly half way between the top of user space and the bottom
 807	# of kernel space, which seems about as good as we can get.
 808	default 0x5deadbeef0000000 if PPC64
 809	default 0
 810
 811config ARCH_MEMORY_PROBE
 812	def_bool y
 813	depends on MEMORY_HOTPLUG
 814
 815choice
 816	prompt "Page size"
 817	default PPC_64K_PAGES if PPC_BOOK3S_64
 818	default PPC_4K_PAGES
 819	help
 820	  Select the kernel logical page size. Increasing the page size
 821	  will reduce software overhead at each page boundary, allow
 822	  hardware prefetch mechanisms to be more effective, and allow
 823	  larger dma transfers increasing IO efficiency and reducing
 824	  overhead. However the utilization of memory will increase.
 825	  For example, each cached file will using a multiple of the
 826	  page size to hold its contents and the difference between the
 827	  end of file and the end of page is wasted.
 828
 829	  Some dedicated systems, such as software raid serving with
 830	  accelerated calculations, have shown significant increases.
 831
 832	  If you configure a 64 bit kernel for 64k pages but the
 833	  processor does not support them, then the kernel will simulate
 834	  them with 4k pages, loading them on demand, but with the
 835	  reduced software overhead and larger internal fragmentation.
 836	  For the 32 bit kernel, a large page option will not be offered
 837	  unless it is supported by the configured processor.
 838
 839	  If unsure, choose 4K_PAGES.
 840
 841config PPC_4K_PAGES
 842	bool "4k page size"
 843	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 844	select HAVE_PAGE_SIZE_4KB
 845
 846config PPC_16K_PAGES
 847	bool "16k page size"
 848	depends on 44x || PPC_8xx
 849	select HAVE_PAGE_SIZE_16KB
 850
 851config PPC_64K_PAGES
 852	bool "64k page size"
 853	depends on 44x || PPC_BOOK3S_64
 854	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 855	select HAVE_PAGE_SIZE_64KB
 856
 857config PPC_256K_PAGES
 858	bool "256k page size (Requires non-standard binutils settings)"
 859	depends on 44x && !PPC_47x
 860	select HAVE_PAGE_SIZE_256KB
 861	help
 862	  Make the page size 256k.
 863
 864	  The kernel will only be able to run applications that have been
 865	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
 866	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
 867	  definition from 0x10000 to 0x40000 in older versions.
 868
 869endchoice
 870
 871config THREAD_SHIFT
 872	int "Thread shift" if EXPERT
 873	range 13 15
 874	default "15" if PPC_256K_PAGES
 875	default "15" if PPC_PSERIES || PPC_POWERNV
 876	default "14" if PPC64
 877	default "13"
 878	help
 879	  Used to define the stack size. The default is almost always what you
 880	  want. Only change this if you know what you are doing.
 881
 882config DATA_SHIFT_BOOL
 883	bool "Set custom data alignment"
 884	depends on ADVANCED_OPTIONS
 885	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
 886	depends on (PPC_8xx && !PIN_TLB_DATA && (!STRICT_KERNEL_RWX || !PIN_TLB_TEXT)) || \
 887		   PPC_BOOK3S_32 || PPC_85xx
 888	help
 889	  This option allows you to set the kernel data alignment. When
 890	  RAM is mapped by blocks, the alignment needs to fit the size and
 891	  number of possible blocks. The default should be OK for most configs.
 892
 893	  Say N here unless you know what you are doing.
 894
 895config DATA_SHIFT
 896	int "Data shift" if DATA_SHIFT_BOOL
 897	default 24 if STRICT_KERNEL_RWX && PPC64
 898	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
 899	range 14 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
 900	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
 901	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 902	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
 903	default 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && \
 904		      (PIN_TLB_DATA || PIN_TLB_TEXT)
 905	default 19 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
 906	default 24 if STRICT_KERNEL_RWX && PPC_85xx
 907	default PAGE_SHIFT
 908	help
 909	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
 910	  Smaller is the alignment, greater is the number of necessary DBATs.
 911
 912	  On 8xx, large pages (16kb or 512kb or 8M) are used to map kernel
 913	  linear memory. Aligning to 8M reduces TLB misses as only 8M pages
 914	  are used in that case. If PIN_TLB is selected, it must be aligned
 915	  to 8M as 8M pages will be pinned.
 916
 917config ARCH_FORCE_MAX_ORDER
 918	int "Order of maximal physically contiguous allocations"
 919	range 7 8 if PPC64 && PPC_64K_PAGES
 920	default "8" if PPC64 && PPC_64K_PAGES
 921	range 12 12 if PPC64 && !PPC_64K_PAGES
 922	default "12" if PPC64 && !PPC_64K_PAGES
 923	range 8 10 if PPC32 && PPC_16K_PAGES
 924	default "8" if PPC32 && PPC_16K_PAGES
 925	range 6 10 if PPC32 && PPC_64K_PAGES
 926	default "6" if PPC32 && PPC_64K_PAGES
 927	range 4 10 if PPC32 && PPC_256K_PAGES
 928	default "4" if PPC32 && PPC_256K_PAGES
 929	range 10 12
 930	default "10"
 931	help
 932	  The kernel page allocator limits the size of maximal physically
 933	  contiguous allocations. The limit is called MAX_PAGE_ORDER and it
 934	  defines the maximal power of two of number of pages that can be
 935	  allocated as a single contiguous block. This option allows
 936	  overriding the default setting when ability to allocate very
 937	  large blocks of physically contiguous memory is required.
 938
 939	  The page size is not necessarily 4KB.  For example, on 64-bit
 940	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 941	  this in mind when choosing a value for this option.
 942
 943	  Don't change if unsure.
 944
 945config PPC_SUBPAGE_PROT
 946	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
 947	default n
 948	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
 949	help
 950	  This option adds support for system call to allow user programs
 951	  to set access permissions (read/write, readonly, or no access)
 952	  on the 4k subpages of each 64k page.
 953
 954	  If unsure, say N here.
 955
 956config PPC_PROT_SAO_LPAR
 957	bool "Support PROT_SAO mappings in LPARs"
 958	depends on PPC_BOOK3S_64
 959	help
 960	  This option adds support for PROT_SAO mappings from userspace
 961	  inside LPARs on supported CPUs.
 962
 963	  This may cause issues when performing guest migration from
 964	  a CPU that supports SAO to one that does not.
 965
 966	  If unsure, say N here.
 967
 968config PPC_COPRO_BASE
 969	bool
 970
 971config PPC_DENORMALISATION
 972	bool "PowerPC denormalisation exception handling"
 973	depends on PPC_BOOK3S_64
 974	default "y" if PPC_POWERNV
 975	help
 976	  Add support for handling denormalisation of single precision
 977	  values.  Useful for bare metal only.  If unsure say Y here.
 978
 979config CMDLINE
 980	string "Initial kernel command string"
 981	default ""
 982	help
 983	  On some platforms, there is currently no way for the boot loader to
 984	  pass arguments to the kernel. For these platforms, you can supply
 985	  some command-line options at build time by entering them here.  In
 986	  most cases you will need to specify the root device here.
 987
 988choice
 989	prompt "Kernel command line type"
 990	depends on CMDLINE != ""
 991	default CMDLINE_FROM_BOOTLOADER
 992
 993config CMDLINE_FROM_BOOTLOADER
 994	bool "Use bootloader kernel arguments if available"
 995	help
 996	  Uses the command-line options passed by the boot loader. If
 997	  the boot loader doesn't provide any, the default kernel command
 998	  string provided in CMDLINE will be used.
 999
1000config CMDLINE_EXTEND
1001	bool "Extend bootloader kernel arguments"
1002	help
1003	  The command-line arguments provided by the boot loader will be
1004	  appended to the default kernel command string.
1005
1006config CMDLINE_FORCE
1007	bool "Always use the default kernel command string"
1008	help
1009	  Always use the default kernel command string, even if the boot
1010	  loader passes other arguments to the kernel.
1011	  This is useful if you cannot or don't want to change the
1012	  command-line options your boot loader passes to the kernel.
1013
1014endchoice
1015
1016config EXTRA_TARGETS
1017	string "Additional default image types"
1018	help
1019	  List additional targets to be built by the bootwrapper here (separated
1020	  by spaces).  This is useful for targets that depend of device tree
1021	  files in the .dts directory.
1022
1023	  Targets in this list will be build as part of the default build
1024	  target, or when the user does a 'make zImage' or a
1025	  'make zImage.initrd'.
1026
1027	  If unsure, leave blank
1028
1029config ARCH_WANTS_FREEZER_CONTROL
1030	def_bool y
1031	depends on ADB_PMU
1032
1033source "kernel/power/Kconfig"
1034
1035config PPC_MEM_KEYS
1036	prompt "PowerPC Memory Protection Keys"
1037	def_bool y
1038	depends on PPC_BOOK3S_64
1039	depends on PPC_64S_HASH_MMU
1040	select ARCH_USES_HIGH_VMA_FLAGS
1041	select ARCH_HAS_PKEYS
1042	help
1043	  Memory Protection Keys provides a mechanism for enforcing
1044	  page-based protections, but without requiring modification of the
1045	  page tables when an application changes protection domains.
1046
1047	  For details, see Documentation/core-api/protection-keys.rst
1048
1049	  If unsure, say y.
1050
1051config ARCH_PKEY_BITS
1052	int
1053	default 5
1054
1055config PPC_SECURE_BOOT
1056	prompt "Enable secure boot support"
1057	bool
1058	depends on PPC_POWERNV || PPC_PSERIES
1059	depends on IMA_ARCH_POLICY
1060	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
1061	select PSERIES_PLPKS if PPC_PSERIES
1062	help
1063	  Systems with firmware secure boot enabled need to define security
1064	  policies to extend secure boot to the OS. This config allows a user
1065	  to enable OS secure boot on systems that have firmware support for
1066	  it. If in doubt say N.
1067
1068config PPC_SECVAR_SYSFS
1069	bool "Enable sysfs interface for POWER secure variables"
1070	default y
1071	depends on PPC_SECURE_BOOT
1072	depends on SYSFS
1073	help
1074	  POWER secure variables are managed and controlled by firmware.
1075	  These variables are exposed to userspace via sysfs to enable
1076	  read/write operations on these variables. Say Y if you have
1077	  secure boot enabled and want to expose variables to userspace.
1078
1079endmenu
1080
1081config ISA_DMA_API
1082	bool
1083	default PCI
1084
1085menu "Bus options"
1086
1087config ISA
1088	bool "Support for ISA-bus hardware"
1089	depends on PPC_CHRP
1090	select PPC_I8259
1091	help
1092	  Find out whether you have ISA slots on your motherboard.  ISA is the
1093	  name of a bus system, i.e. the way the CPU talks to the other stuff
1094	  inside your box.  If you have an Apple machine, say N here; if you
1095	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1096	  embedded board, consult your board documentation.
1097
1098config GENERIC_ISA_DMA
1099	bool
1100	depends on ISA_DMA_API
1101	default y
1102
1103config PPC_INDIRECT_PCI
1104	bool
1105	depends on PCI
1106	default y if 44x
1107
1108config SBUS
1109	bool
1110
1111config FSL_SOC
1112	bool
1113
1114config FSL_PCI
1115	bool
1116	select ARCH_HAS_DMA_SET_MASK
1117	select PPC_INDIRECT_PCI
1118	select PCI_QUIRKS
1119
1120config FSL_PMC
1121	bool
1122	default y
1123	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1124	help
1125	  Freescale MPC85xx/MPC86xx power management controller support
1126	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1127
1128config PPC4xx_CPM
1129	bool
1130	default y
1131	depends on SUSPEND && 44x
1132	help
1133	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1134	  It also enables support for two different idle states (idle-wait
1135	  and idle-doze).
1136
1137config FSL_LBC
1138	bool "Freescale Local Bus support"
1139	help
1140	  Enables reporting of errors from the Freescale local bus
1141	  controller.  Also contains some common code used by
1142	  drivers for specific local bus peripherals.
1143
1144config FSL_GTM
1145	bool
1146	depends on PPC_83xx || QUICC_ENGINE || CPM2
1147	help
1148	  Freescale General-purpose Timers support
1149
1150config FSL_RIO
1151	bool "Freescale Embedded SRIO Controller support"
1152	depends on RAPIDIO = y && HAVE_RAPIDIO
1153	default "n"
1154	help
1155	  Include support for RapidIO controller on Freescale embedded
1156	  processors (MPC8548, MPC8641, etc).
1157
1158endmenu
1159
1160config NONSTATIC_KERNEL
1161	bool
1162
1163menu "Advanced setup"
1164	depends on PPC32
1165
1166config ADVANCED_OPTIONS
1167	bool "Prompt for advanced kernel configuration options"
1168	help
1169	  This option will enable prompting for a variety of advanced kernel
1170	  configuration options.  These options can cause the kernel to not
1171	  work if they are set incorrectly, but can be used to optimize certain
1172	  aspects of kernel memory management.
1173
1174	  Unless you know what you are doing, say N here.
1175
1176comment "Default settings for advanced configuration options are used"
1177	depends on !ADVANCED_OPTIONS
1178
1179config LOWMEM_SIZE_BOOL
1180	bool "Set maximum low memory"
1181	depends on ADVANCED_OPTIONS
1182	help
1183	  This option allows you to set the maximum amount of memory which
1184	  will be used as "low memory", that is, memory which the kernel can
1185	  access directly, without having to set up a kernel virtual mapping.
1186	  This can be useful in optimizing the layout of kernel virtual
1187	  memory.
1188
1189	  Say N here unless you know what you are doing.
1190
1191config LOWMEM_SIZE
1192	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1193	default "0x30000000"
1194
1195config LOWMEM_CAM_NUM_BOOL
1196	bool "Set number of CAMs to use to map low memory"
1197	depends on ADVANCED_OPTIONS && PPC_85xx
1198	help
1199	  This option allows you to set the maximum number of CAM slots that
1200	  will be used to map low memory.  There are a limited number of slots
1201	  available and even more limited number that will fit in the L1 MMU.
1202	  However, using more entries will allow mapping more low memory.  This
1203	  can be useful in optimizing the layout of kernel virtual memory.
1204
1205	  Say N here unless you know what you are doing.
1206
1207config LOWMEM_CAM_NUM
1208	depends on PPC_85xx
1209	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1210	default 3 if !STRICT_KERNEL_RWX
1211	default 9 if DATA_SHIFT >= 24
1212	default 12 if DATA_SHIFT >= 22
1213	default 15
1214
1215config DYNAMIC_MEMSTART
1216	bool "Enable page aligned dynamic load address for kernel"
1217	depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x)
1218	select NONSTATIC_KERNEL
1219	help
1220	  This option enables the kernel to be loaded at any page aligned
1221	  physical address. The kernel creates a mapping from KERNELBASE to
1222	  the address where the kernel is loaded. The page size here implies
1223	  the TLB page size of the mapping for kernel on the particular platform.
1224	  Please refer to the init code for finding the TLB page size.
1225
1226	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1227	  kernel image, where the only restriction is the page aligned kernel
1228	  load address. When this option is enabled, the compile time physical
1229	  address CONFIG_PHYSICAL_START is ignored.
1230
1231	  This option is overridden by CONFIG_RELOCATABLE
1232
1233config PAGE_OFFSET_BOOL
1234	bool "Set custom page offset address"
1235	depends on ADVANCED_OPTIONS
1236	help
1237	  This option allows you to set the kernel virtual address at which
1238	  the kernel will map low memory.  This can be useful in optimizing
1239	  the virtual memory layout of the system.
1240
1241	  Say N here unless you know what you are doing.
1242
1243config PAGE_OFFSET
1244	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1245	default "0xc0000000"
1246
1247config KERNEL_START_BOOL
1248	bool "Set custom kernel base address"
1249	depends on ADVANCED_OPTIONS
1250	help
1251	  This option allows you to set the kernel virtual address at which
1252	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1253	  however there are times (like kdump) that one might not want them
1254	  to be the same.
1255
1256	  Say N here unless you know what you are doing.
1257
1258config KERNEL_START
1259	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1260	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1261	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1262	default "0xc0000000"
1263
1264config PHYSICAL_START_BOOL
1265	bool "Set physical address where the kernel is loaded"
1266	depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx
1267	help
1268	  This gives the physical address where the kernel is loaded.
1269
1270	  Say N here unless you know what you are doing.
1271
1272config PHYSICAL_START
1273	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1274	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1275	default "0x00000000"
1276
1277config PHYSICAL_ALIGN
1278	hex
1279	default "0x04000000" if PPC_85xx
1280	help
1281	  This value puts the alignment restrictions on physical address
1282	  where kernel is loaded and run from. Kernel is compiled for an
1283	  address which meets above alignment restriction.
1284
1285config TASK_SIZE_BOOL
1286	bool "Set custom user task size"
1287	depends on ADVANCED_OPTIONS
1288	help
1289	  This option allows you to set the amount of virtual address space
1290	  allocated to user tasks.  This can be useful in optimizing the
1291	  virtual memory layout of the system.
1292
1293	  Say N here unless you know what you are doing.
1294
1295config TASK_SIZE
1296	hex "Size of user task space" if TASK_SIZE_BOOL
1297	default "0x80000000" if PPC_8xx
1298	default "0xb0000000" if PPC_BOOK3S_32 && EXECMEM
1299	default "0xc0000000"
1300
1301config MODULES_SIZE_BOOL
1302	bool "Set custom size for modules/execmem area"
1303	depends on EXECMEM && ADVANCED_OPTIONS
1304	help
1305	  This option allows you to set the size of kernel virtual address
1306	  space dedicated for modules/execmem.
1307	  For the time being it is only for 8xx and book3s/32. Other
1308	  platform share it with vmalloc space.
1309
1310	  Say N here unless you know what you are doing.
1311
1312config MODULES_SIZE
1313	int "Size of modules/execmem area (In Mbytes)" if MODULES_SIZE_BOOL
1314	range 1 256 if EXECMEM
1315	default 64 if EXECMEM && PPC_BOOK3S_32
1316	default 32 if EXECMEM && PPC_8xx
1317	default 0
1318
1319endmenu
1320
1321config PPC64_PROC_SYSTEMCFG
1322	def_bool y
1323	depends on PPC64 && PROC_FS
1324	help
1325	  This option enables the presence of /proc/ppc64/systemcfg through
1326	  which the systemcfg page can be accessed.
1327	  This interface only exists for backwards-compatibility.
1328
1329if PPC64
1330# This value must have zeroes in the bottom 60 bits otherwise lots will break
1331config PAGE_OFFSET
1332	hex
1333	default "0xc000000000000000"
1334config KERNEL_START
1335	hex
1336	default "0xc000000000000000"
1337config PHYSICAL_START
1338	hex
1339	default "0x00000000"
1340endif
1341
1342config PPC_LIB_RHEAP
1343	bool
1344
1345source "arch/powerpc/kvm/Kconfig"
1346
1347source "kernel/livepatch/Kconfig"