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_DISABLE_KASAN_INLINE	if PPC_RADIX_MMU
 126	select ARCH_DMA_DEFAULT_COHERENT	if !NOT_COHERENT_CACHE
 127	select ARCH_ENABLE_MEMORY_HOTPLUG
 128	select ARCH_ENABLE_MEMORY_HOTREMOVE
 129	select ARCH_HAS_COPY_MC			if PPC64
 130	select ARCH_HAS_CURRENT_STACK_POINTER
 131	select ARCH_HAS_DEBUG_VIRTUAL
 132	select ARCH_HAS_DEBUG_VM_PGTABLE
 133	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
 134	select ARCH_HAS_DEVMEM_IS_ALLOWED
 135	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
 136	select ARCH_HAS_FORTIFY_SOURCE
 137	select ARCH_HAS_GCOV_PROFILE_ALL
 138	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
 139	select ARCH_HAS_KCOV
 140	select ARCH_HAS_MEMBARRIER_CALLBACKS
 141	select ARCH_HAS_MEMBARRIER_SYNC_CORE
 142	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
 143	select ARCH_HAS_MMIOWB			if PPC64
 144	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
 145	select ARCH_HAS_PHYS_TO_DMA
 146	select ARCH_HAS_PMEM_API
 147	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
 148	select ARCH_HAS_PTE_SPECIAL
 
 149	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
 150	select ARCH_HAS_SET_MEMORY
 151	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
 152	select ARCH_HAS_STRICT_KERNEL_RWX	if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
 153	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX
 154	select ARCH_HAS_SYSCALL_WRAPPER		if !SPU_BASE && !COMPAT
 155	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
 156	select ARCH_HAS_UACCESS_FLUSHCACHE
 
 157	select ARCH_HAS_UBSAN_SANITIZE_ALL
 158	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 159	select ARCH_KEEP_MEMBLOCK
 160	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE	if PPC_RADIX_MMU
 161	select ARCH_MIGHT_HAVE_PC_PARPORT
 162	select ARCH_MIGHT_HAVE_PC_SERIO
 163	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
 164	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
 165	select ARCH_SPLIT_ARG64			if PPC32
 166	select ARCH_STACKWALK
 167	select ARCH_SUPPORTS_ATOMIC_RMW
 168	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
 169	select ARCH_USE_BUILTIN_BSWAP
 170	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
 171	select ARCH_USE_MEMTEST
 172	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
 173	select ARCH_WANT_DEFAULT_BPF_JIT
 174	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
 175	select ARCH_WANT_IPC_PARSE_VERSION
 176	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
 177	select ARCH_WANT_LD_ORPHAN_WARN
 178	select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP	if PPC_RADIX_MMU
 179	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
 180	select ARCH_WEAK_RELEASE_ACQUIRE
 181	select BINFMT_ELF
 182	select BUILDTIME_TABLE_SORT
 183	select CLONE_BACKWARDS
 184	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
 185	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
 186	select DMA_OPS_BYPASS			if PPC64
 187	select DMA_OPS				if PPC64
 188	select DYNAMIC_FTRACE			if FUNCTION_TRACER
 189	select EDAC_ATOMIC_SCRUB
 190	select EDAC_SUPPORT
 191	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 192	select FUNCTION_ALIGNMENT_4B
 193	select GENERIC_ATOMIC64			if PPC32
 
 194	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
 195	select GENERIC_CMOS_UPDATE
 196	select GENERIC_CPU_AUTOPROBE
 197	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
 198	select GENERIC_EARLY_IOREMAP
 199	select GENERIC_GETTIMEOFDAY
 200	select GENERIC_IDLE_POLL_SETUP
 201	select GENERIC_IOREMAP
 202	select GENERIC_IRQ_SHOW
 203	select GENERIC_IRQ_SHOW_LEVEL
 204	select GENERIC_PCI_IOMAP		if PCI
 205	select GENERIC_PTDUMP
 206	select GENERIC_SMP_IDLE_THREAD
 
 
 207	select GENERIC_TIME_VSYSCALL
 208	select GENERIC_VDSO_TIME_NS
 209	select HAS_IOPORT			if PCI
 210	select HAVE_ARCH_AUDITSYSCALL
 211	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
 212	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
 213	select HAVE_ARCH_JUMP_LABEL
 214	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 215	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
 216	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
 217	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
 218	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
 219	select HAVE_ARCH_KCSAN
 220	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
 221	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
 222	select HAVE_ARCH_WITHIN_STACK_FRAMES
 223	select HAVE_ARCH_KGDB
 224	select HAVE_ARCH_MMAP_RND_BITS
 225	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
 226	select HAVE_ARCH_NVRAM_OPS
 227	select HAVE_ARCH_SECCOMP_FILTER
 228	select HAVE_ARCH_TRACEHOOK
 229	select HAVE_ASM_MODVERSIONS
 230	select HAVE_CONTEXT_TRACKING_USER
 231	select HAVE_C_RECORDMCOUNT
 
 
 
 
 
 232	select HAVE_DEBUG_KMEMLEAK
 233	select HAVE_DEBUG_STACKOVERFLOW
 234	select HAVE_DYNAMIC_FTRACE
 235	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 236	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 237	select HAVE_EBPF_JIT
 238	select HAVE_EFFICIENT_UNALIGNED_ACCESS
 239	select HAVE_FAST_GUP
 240	select HAVE_FTRACE_MCOUNT_RECORD
 241	select HAVE_FUNCTION_ARG_ACCESS_API
 242	select HAVE_FUNCTION_DESCRIPTORS	if PPC64_ELF_ABI_V1
 243	select HAVE_FUNCTION_ERROR_INJECTION
 244	select HAVE_FUNCTION_GRAPH_TRACER
 245	select HAVE_FUNCTION_TRACER		if PPC64 || (PPC32 && CC_IS_GCC)
 246	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
 247	select HAVE_GENERIC_VDSO
 248	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
 249	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
 250	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 
 251	select HAVE_IOREMAP_PROT
 252	select HAVE_IRQ_TIME_ACCOUNTING
 253	select HAVE_KERNEL_GZIP
 254	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
 255	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
 256	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
 257	select HAVE_KPROBES
 258	select HAVE_KPROBES_ON_FTRACE
 259	select HAVE_KRETPROBES
 260	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if HAVE_OBJTOOL_MCOUNT && (!ARCH_USING_PATCHABLE_FUNCTION_ENTRY || (!CC_IS_GCC || GCC_VERSION >= 110100))
 261	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
 
 262	select HAVE_MOD_ARCH_SPECIFIC
 263	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
 264	select HAVE_OPTPROBES
 265	select HAVE_OBJTOOL			if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
 266	select HAVE_OBJTOOL_MCOUNT		if HAVE_OBJTOOL
 267	select HAVE_PERF_EVENTS
 268	select HAVE_PERF_EVENTS_NMI		if PPC64
 
 269	select HAVE_PERF_REGS
 270	select HAVE_PERF_USER_STACK_DUMP
 
 
 
 271	select HAVE_REGS_AND_STACK_ACCESS_API
 272	select HAVE_RELIABLE_STACKTRACE
 273	select HAVE_RSEQ
 274	select HAVE_SETUP_PER_CPU_AREA		if PPC64
 275	select HAVE_SOFTIRQ_ON_OWN_STACK
 276	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
 277	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
 278	select HAVE_STATIC_CALL			if PPC32
 279	select HAVE_SYSCALL_TRACEPOINTS
 280	select HAVE_VIRT_CPU_ACCOUNTING
 281	select HAVE_VIRT_CPU_ACCOUNTING_GEN
 282	select HOTPLUG_SMT			if HOTPLUG_CPU
 283	select SMT_NUM_THREADS_DYNAMIC
 284	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
 285	select IOMMU_HELPER			if PPC64
 286	select IRQ_DOMAIN
 287	select IRQ_FORCED_THREADING
 288	select KASAN_VMALLOC			if KASAN && MODULES
 289	select LOCK_MM_AND_FIND_VMA
 290	select MMU_GATHER_PAGE_SIZE
 291	select MMU_GATHER_RCU_TABLE_FREE
 292	select MMU_GATHER_MERGE_VMAS
 293	select MMU_LAZY_TLB_SHOOTDOWN		if PPC_BOOK3S_64
 294	select MODULES_USE_ELF_RELA
 295	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
 296	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
 297	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
 298	select NEED_SG_DMA_LENGTH
 299	select OF
 300	select OF_EARLY_FLATTREE
 301	select OLD_SIGACTION			if PPC32
 302	select OLD_SIGSUSPEND
 303	select PCI_DOMAINS			if PCI
 304	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
 305	select PCI_SYSCALL			if PCI
 306	select PPC_DAWR				if PPC64
 307	select RTC_LIB
 308	select SPARSE_IRQ
 309	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
 310	select SYSCTL_EXCEPTION_TRACE
 311	select THREAD_INFO_IN_TASK
 312	select TRACE_IRQFLAGS_SUPPORT
 313	#
 314	# Please keep this list sorted alphabetically.
 315	#
 316
 317config PPC_BARRIER_NOSPEC
 318	bool
 319	default y
 320	depends on PPC_BOOK3S_64 || PPC_E500
 321
 322config PPC_HAS_LBARX_LHARX
 323	bool
 324
 325config EARLY_PRINTK
 326	bool
 327	default y
 328
 329config PANIC_TIMEOUT
 330	int
 331	default 180
 332
 333config COMPAT
 334	bool "Enable support for 32bit binaries"
 335	depends on PPC64
 336	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
 337	default y if !CPU_LITTLE_ENDIAN
 338	select ARCH_WANT_OLD_COMPAT_IPC
 339	select COMPAT_OLD_SIGACTION
 340
 
 
 
 
 
 341config SCHED_OMIT_FRAME_POINTER
 342	bool
 343	default y
 344
 345config ARCH_MAY_HAVE_PC_FDC
 346	bool
 347	default PCI
 348
 349config PPC_UDBG_16550
 350	bool
 351
 352config GENERIC_TBSYNC
 353	bool
 354	default y if PPC32 && SMP
 355
 356config AUDIT_ARCH
 357	bool
 358	default y
 359
 360config GENERIC_BUG
 361	bool
 362	default y
 363	depends on BUG
 364
 365config GENERIC_BUG_RELATIVE_POINTERS
 366	def_bool y
 367	depends on GENERIC_BUG
 368
 369config SYS_SUPPORTS_APM_EMULATION
 370	default y if PMAC_APM_EMU
 371	bool
 372
 373config EPAPR_BOOT
 374	bool
 375	help
 376	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
 377
 378config DEFAULT_UIMAGE
 379	bool
 380	help
 381	  Used to allow a board to specify it wants a uImage built by default
 382
 383config ARCH_HIBERNATION_POSSIBLE
 384	bool
 385	default y
 386
 387config ARCH_SUSPEND_POSSIBLE
 388	def_bool y
 389	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 390		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 391		   || 44x || 40x
 392
 393config ARCH_SUSPEND_NONZERO_CPU
 394	def_bool y
 395	depends on PPC_POWERNV || PPC_PSERIES
 396
 397config ARCH_HAS_ADD_PAGES
 398	def_bool y
 399	depends on ARCH_ENABLE_MEMORY_HOTPLUG
 400
 401config PPC_DCR_NATIVE
 402	bool
 403
 404config PPC_DCR_MMIO
 405	bool
 406
 407config PPC_DCR
 408	bool
 409	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 410	default y
 411
 412config PPC_PCI_OF_BUS_MAP
 413	bool "Use pci_to_OF_bus_map (deprecated)"
 414	depends on PPC32
 415	depends on PPC_PMAC || PPC_CHRP
 416	help
 417	  This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which
 418	  restricts the system to only having 256 PCI buses. On CHRP it also causes
 419	  the "pci-OF-bus-map" property to be created in the device tree.
 420
 421	  If unsure, say "N".
 422
 423config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
 424	depends on PPC32
 425	depends on !PPC_PCI_OF_BUS_MAP
 426	bool "Assign PCI bus numbers from zero individually for each PCI domain"
 427	default y
 428	help
 429	  By default on PPC32 were PCI bus numbers unique across all PCI domains.
 430	  So system could have only 256 PCI buses independently of available
 431	  PCI domains. When this option is enabled then PCI bus numbers are
 432	  PCI domain dependent and each PCI controller on own domain can have
 433	  256 PCI buses, like it is on other Linux architectures.
 434
 435config PPC_OF_PLATFORM_PCI
 436	bool
 437	depends on PCI
 438	depends on PPC64 # not supported on 32 bits yet
 439
 
 
 
 
 440config ARCH_SUPPORTS_UPROBES
 441	def_bool y
 442
 443config PPC_ADV_DEBUG_REGS
 444	bool
 445	depends on 40x || BOOKE
 446	default y
 447
 448config PPC_ADV_DEBUG_IACS
 449	int
 450	depends on PPC_ADV_DEBUG_REGS
 451	default 4 if 44x
 452	default 2
 453
 454config PPC_ADV_DEBUG_DACS
 455	int
 456	depends on PPC_ADV_DEBUG_REGS
 457	default 2
 458
 459config PPC_ADV_DEBUG_DVCS
 460	int
 461	depends on PPC_ADV_DEBUG_REGS
 462	default 2 if 44x
 463	default 0
 464
 465config PPC_ADV_DEBUG_DAC_RANGE
 466	bool
 467	depends on PPC_ADV_DEBUG_REGS && 44x
 468	default y
 469
 470config PPC_DAWR
 471	bool
 472
 
 
 
 
 473config PGTABLE_LEVELS
 474	int
 475	default 2 if !PPC64
 476	default 4
 477
 478source "arch/powerpc/sysdev/Kconfig"
 479source "arch/powerpc/platforms/Kconfig"
 480
 481menu "Kernel options"
 482
 483config HIGHMEM
 484	bool "High memory support"
 485	depends on PPC32
 486	select KMAP_LOCAL
 487
 488source "kernel/Kconfig.hz"
 489
 
 
 
 
 
 490config MATH_EMULATION
 491	bool "Math emulation"
 492	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
 493	select PPC_FPU_REGS
 494	help
 495	  Some PowerPC chips designed for embedded applications do not have
 496	  a floating-point unit and therefore do not implement the
 497	  floating-point instructions in the PowerPC instruction set.  If you
 498	  say Y here, the kernel will include code to emulate a floating-point
 499	  unit, which will allow programs that use floating-point
 500	  instructions to run.
 501
 502	  This is also useful to emulate missing (optional) instructions
 503	  such as fsqrt on cores that do have an FPU but do not implement
 504	  them (such as Freescale BookE).
 505
 506choice
 507	prompt "Math emulation options"
 508	default MATH_EMULATION_FULL
 509	depends on MATH_EMULATION
 510
 511config MATH_EMULATION_FULL
 512	bool "Emulate all the floating point instructions"
 513	help
 514	  Select this option will enable the kernel to support to emulate
 515	  all the floating point instructions. If your SoC doesn't have
 516	  a FPU, you should select this.
 517
 518config MATH_EMULATION_HW_UNIMPLEMENTED
 519	bool "Just emulate the FPU unimplemented instructions"
 520	help
 521	  Select this if you know there does have a hardware FPU on your
 522	  SoC, but some floating point instructions are not implemented by that.
 523
 524endchoice
 525
 526config PPC_TRANSACTIONAL_MEM
 527	bool "Transactional Memory support for POWERPC"
 528	depends on PPC_BOOK3S_64
 529	depends on SMP
 530	select ALTIVEC
 531	select VSX
 532	help
 533	  Support user-mode Transactional Memory on POWERPC.
 534
 535config PPC_UV
 536	bool "Ultravisor support"
 537	depends on KVM_BOOK3S_HV_POSSIBLE
 538	depends on DEVICE_PRIVATE
 539	default n
 540	help
 541	  This option paravirtualizes the kernel to run in POWER platforms that
 542	  supports the Protected Execution Facility (PEF). On such platforms,
 543	  the ultravisor firmware runs at a privilege level above the
 544	  hypervisor.
 545
 546	  If unsure, say "N".
 547
 548config LD_HEAD_STUB_CATCH
 549	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
 550	depends on PPC64
 551	help
 552	  Very large kernels can cause linker branch stubs to be generated by
 553	  code in head_64.S, which moves the head text sections out of their
 554	  specified location. This option can work around the problem.
 555
 556	  If unsure, say "N".
 557
 558config MPROFILE_KERNEL
 559	depends on PPC64_ELF_ABI_V2 && FUNCTION_TRACER
 560	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN
 561	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN
 562
 563config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 564	depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
 565	depends on $(cc-option,-fpatchable-function-entry=2)
 566	def_bool y if PPC32
 567	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
 568	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
 569
 570config HOTPLUG_CPU
 571	bool "Support for enabling/disabling CPUs"
 572	depends on SMP && (PPC_PSERIES || \
 573		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 574	help
 575	  Say Y here to be able to disable and re-enable individual
 576	  CPUs at runtime on SMP machines.
 577
 578	  Say N if you are unsure.
 579
 580config INTERRUPT_SANITIZE_REGISTERS
 581	bool "Clear gprs on interrupt arrival"
 582	depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER
 583	default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV
 584	help
 585	  Reduce the influence of user register state on interrupt handlers and
 586	  syscalls through clearing user state from registers before handling
 587	  the exception.
 588
 589config PPC_QUEUED_SPINLOCKS
 590	bool "Queued spinlocks" if EXPERT
 591	depends on SMP
 592	default PPC_BOOK3S_64
 593	help
 594	  Say Y here to use queued spinlocks which give better scalability and
 595	  fairness on large SMP and NUMA systems without harming single threaded
 596	  performance.
 597
 598config ARCH_CPU_PROBE_RELEASE
 599	def_bool y
 600	depends on HOTPLUG_CPU
 601
 
 
 
 
 
 
 602config PPC64_SUPPORTS_MEMORY_FAILURE
 603	bool "Add support for memory hwpoison"
 604	depends on PPC_BOOK3S_64
 605	default "y" if PPC_POWERNV
 606	select ARCH_SUPPORTS_MEMORY_FAILURE
 607
 608config ARCH_SUPPORTS_KEXEC
 609	def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
 610
 611config ARCH_SUPPORTS_KEXEC_FILE
 612	def_bool PPC64
 613
 614config ARCH_SUPPORTS_KEXEC_PURGATORY
 615	def_bool y
 616
 617config ARCH_SELECTS_KEXEC_FILE
 618	def_bool y
 619	depends on KEXEC_FILE
 
 
 
 
 
 
 
 
 
 
 
 620	select KEXEC_ELF
 621	select HAVE_IMA_KEXEC if IMA
 622
 623config PPC64_BIG_ENDIAN_ELF_ABI_V2
 624	# Option is available to BFD, but LLD does not support ELFv1 so this is
 625	# always true there.
 626	prompt "Build big-endian kernel using ELF ABI V2" if LD_IS_BFD && EXPERT
 627	def_bool y
 628	depends on PPC64 && CPU_BIG_ENDIAN
 629	depends on CC_HAS_ELFV2
 630	help
 631	  This builds the kernel image using the "Power Architecture 64-Bit ELF
 632	  V2 ABI Specification", which has a reduced stack overhead and faster
 633	  function calls. This internal kernel ABI option does not affect
 634          userspace compatibility.
 635
 636	  The V2 ABI is standard for 64-bit little-endian, but for big-endian
 637	  it is less well tested by kernel and toolchain. However some distros
 638	  build userspace this way, and it can produce a functioning kernel.
 639
 640config RELOCATABLE
 641	bool "Build a relocatable kernel"
 642	depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
 643	select NONSTATIC_KERNEL
 
 644	help
 645	  This builds a kernel image that is capable of running at the
 646	  location the kernel is loaded at. For ppc32, there is no any
 647	  alignment restrictions, and this feature is a superset of
 648	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 649	  16k-aligned base address. The kernel is linked as a
 650	  position-independent executable (PIE) and contains dynamic relocations
 651	  which are processed early in the bootup process.
 652
 653	  One use is for the kexec on panic case where the recovery kernel
 654	  must live at a different physical address than the primary
 655	  kernel.
 656
 657	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 658	  it has been loaded at and the compile time physical addresses
 659	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 660	  setting can still be useful to bootwrappers that need to know the
 661	  load address of the kernel (eg. u-boot/mkimage).
 662
 663config RANDOMIZE_BASE
 664	bool "Randomize the address of the kernel image"
 665	depends on PPC_85xx && FLATMEM
 666	depends on RELOCATABLE
 667	help
 668	  Randomizes the virtual address at which the kernel image is
 669	  loaded, as a security feature that deters exploit attempts
 670	  relying on knowledge of the location of kernel internals.
 671
 672	  If unsure, say Y.
 673
 674config RELOCATABLE_TEST
 675	bool "Test relocatable kernel"
 676	depends on (PPC64 && RELOCATABLE)
 677	help
 678	  This runs the relocatable kernel at the address it was initially
 679	  loaded at, which tends to be non-zero and therefore test the
 680	  relocation code.
 681
 682config ARCH_SUPPORTS_CRASH_DUMP
 683	def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
 684
 685config ARCH_SELECTS_CRASH_DUMP
 686	def_bool y
 687	depends on CRASH_DUMP
 688	select RELOCATABLE if PPC64 || 44x || PPC_85xx
 
 689
 690config FA_DUMP
 691	bool "Firmware-assisted dump"
 692	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
 693	select CRASH_CORE
 694	select CRASH_DUMP
 695	help
 696	  A robust mechanism to get reliable kernel crash dump with
 697	  assistance from firmware. This approach does not use kexec,
 698	  instead firmware assists in booting the capture kernel
 699	  while preserving memory contents. Firmware-assisted dump
 700	  is meant to be a kdump replacement offering robustness and
 701	  speed not possible without system firmware assistance.
 702
 703	  If unsure, say "y". Only special kernels like petitboot may
 704	  need to say "N" here.
 705
 706config PRESERVE_FA_DUMP
 707	bool "Preserve Firmware-assisted dump"
 708	depends on PPC64 && PPC_POWERNV && !FA_DUMP
 709	help
 710	  On a kernel with FA_DUMP disabled, this option helps to preserve
 711	  crash data from a previously crash'ed kernel. Useful when the next
 712	  memory preserving kernel boot would process this crash data.
 713	  Petitboot kernel is the typical usecase for this option.
 714
 715config OPAL_CORE
 716	bool "Export OPAL memory as /sys/firmware/opal/core"
 717	depends on PPC64 && PPC_POWERNV
 718	help
 719	  This option uses the MPIPL support in firmware to provide an
 720	  ELF core of OPAL memory after a crash. The ELF core is exported
 721	  as /sys/firmware/opal/core file which is helpful in debugging
 722	  OPAL crashes using GDB.
 723
 724config IRQ_ALL_CPUS
 725	bool "Distribute interrupts on all CPUs by default"
 726	depends on SMP
 727	help
 728	  This option gives the kernel permission to distribute IRQs across
 729	  multiple CPUs.  Saying N here will route all IRQs to the first
 730	  CPU.  Generally saying Y is safe, although some problems have been
 731	  reported with SMP Power Macintoshes with this option enabled.
 732
 733config NUMA
 734	bool "NUMA Memory Allocation and Scheduler Support"
 735	depends on PPC64 && SMP
 736	default y if PPC_PSERIES || PPC_POWERNV
 737	select USE_PERCPU_NUMA_NODE_ID
 738	help
 739	  Enable NUMA (Non-Uniform Memory Access) support.
 740
 741	  The kernel will try to allocate memory used by a CPU on the
 742	  local memory controller of the CPU and add some more
 743	  NUMA awareness to the kernel.
 744
 745config NODES_SHIFT
 746	int
 747	default "8" if PPC64
 748	default "4"
 
 
 
 
 749	depends on NUMA
 750
 751config HAVE_MEMORYLESS_NODES
 752	def_bool y
 753	depends on NUMA
 754
 755config ARCH_SELECT_MEMORY_MODEL
 756	def_bool y
 757	depends on PPC64
 758
 759config ARCH_FLATMEM_ENABLE
 760	def_bool y
 761	depends on (PPC64 && !NUMA) || PPC32
 762
 763config ARCH_SPARSEMEM_ENABLE
 764	def_bool y
 765	depends on PPC64
 766	select SPARSEMEM_VMEMMAP_ENABLE
 767
 768config ARCH_SPARSEMEM_DEFAULT
 769	def_bool y
 770	depends on PPC_BOOK3S_64
 771
 
 
 
 772config ILLEGAL_POINTER_VALUE
 773	hex
 774	# This is roughly half way between the top of user space and the bottom
 775	# of kernel space, which seems about as good as we can get.
 776	default 0x5deadbeef0000000 if PPC64
 777	default 0
 778
 779config ARCH_MEMORY_PROBE
 780	def_bool y
 781	depends on MEMORY_HOTPLUG
 782
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 783choice
 784	prompt "Page size"
 785	default PPC_64K_PAGES if PPC_BOOK3S_64
 786	default PPC_4K_PAGES
 787	help
 788	  Select the kernel logical page size. Increasing the page size
 789	  will reduce software overhead at each page boundary, allow
 790	  hardware prefetch mechanisms to be more effective, and allow
 791	  larger dma transfers increasing IO efficiency and reducing
 792	  overhead. However the utilization of memory will increase.
 793	  For example, each cached file will using a multiple of the
 794	  page size to hold its contents and the difference between the
 795	  end of file and the end of page is wasted.
 796
 797	  Some dedicated systems, such as software raid serving with
 798	  accelerated calculations, have shown significant increases.
 799
 800	  If you configure a 64 bit kernel for 64k pages but the
 801	  processor does not support them, then the kernel will simulate
 802	  them with 4k pages, loading them on demand, but with the
 803	  reduced software overhead and larger internal fragmentation.
 804	  For the 32 bit kernel, a large page option will not be offered
 805	  unless it is supported by the configured processor.
 806
 807	  If unsure, choose 4K_PAGES.
 808
 809config PPC_4K_PAGES
 810	bool "4k page size"
 811	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 812
 813config PPC_16K_PAGES
 814	bool "16k page size"
 815	depends on 44x || PPC_8xx
 816
 817config PPC_64K_PAGES
 818	bool "64k page size"
 819	depends on 44x || PPC_BOOK3S_64
 820	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 821
 822config PPC_256K_PAGES
 823	bool "256k page size (Requires non-standard binutils settings)"
 824	depends on 44x && !PPC_47x
 825	help
 826	  Make the page size 256k.
 827
 828	  The kernel will only be able to run applications that have been
 829	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
 830	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
 831	  definition from 0x10000 to 0x40000 in older versions.
 832
 833endchoice
 834
 835config PAGE_SIZE_4KB
 836	def_bool y
 837	depends on PPC_4K_PAGES
 838
 839config PAGE_SIZE_16KB
 840	def_bool y
 841	depends on PPC_16K_PAGES
 842
 843config PAGE_SIZE_64KB
 844	def_bool y
 845	depends on PPC_64K_PAGES
 846
 847config PAGE_SIZE_256KB
 848	def_bool y
 849	depends on PPC_256K_PAGES
 850
 851config PPC_PAGE_SHIFT
 852	int
 853	default 18 if PPC_256K_PAGES
 854	default 16 if PPC_64K_PAGES
 855	default 14 if PPC_16K_PAGES
 856	default 12
 857
 858config THREAD_SHIFT
 859	int "Thread shift" if EXPERT
 860	range 13 15
 861	default "15" if PPC_256K_PAGES
 862	default "15" if PPC_PSERIES || PPC_POWERNV
 863	default "14" if PPC64
 864	default "13"
 865	help
 866	  Used to define the stack size. The default is almost always what you
 867	  want. Only change this if you know what you are doing.
 868
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 869config DATA_SHIFT_BOOL
 870	bool "Set custom data alignment"
 
 871	depends on ADVANCED_OPTIONS
 872	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
 873	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
 874		   PPC_85xx
 875	help
 876	  This option allows you to set the kernel data alignment. When
 877	  RAM is mapped by blocks, the alignment needs to fit the size and
 878	  number of possible blocks. The default should be OK for most configs.
 879
 880	  Say N here unless you know what you are doing.
 881
 882config DATA_SHIFT
 883	int "Data shift" if DATA_SHIFT_BOOL
 884	default 24 if STRICT_KERNEL_RWX && PPC64
 885	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
 886	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
 887	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
 888	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 889	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
 890	default 23 if STRICT_KERNEL_RWX && PPC_8xx
 891	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
 892	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
 893	default 24 if STRICT_KERNEL_RWX && PPC_85xx
 894	default PPC_PAGE_SHIFT
 895	help
 896	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
 897	  Smaller is the alignment, greater is the number of necessary DBATs.
 898
 899	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
 900	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
 901	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
 902	  8M pages will be pinned.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 903
 904config ARCH_FORCE_MAX_ORDER
 905	int "Order of maximal physically contiguous allocations"
 906	range 7 8 if PPC64 && PPC_64K_PAGES
 907	default "8" if PPC64 && PPC_64K_PAGES
 908	range 12 12 if PPC64 && !PPC_64K_PAGES
 909	default "12" if PPC64 && !PPC_64K_PAGES
 910	range 8 10 if PPC32 && PPC_16K_PAGES
 911	default "8" if PPC32 && PPC_16K_PAGES
 912	range 6 10 if PPC32 && PPC_64K_PAGES
 913	default "6" if PPC32 && PPC_64K_PAGES
 914	range 4 10 if PPC32 && PPC_256K_PAGES
 915	default "4" if PPC32 && PPC_256K_PAGES
 916	range 10 12
 917	default "10"
 918	help
 919	  The kernel page allocator limits the size of maximal physically
 920	  contiguous allocations. The limit is called MAX_PAGE_ORDER and it
 921	  defines the maximal power of two of number of pages that can be
 922	  allocated as a single contiguous block. This option allows
 923	  overriding the default setting when ability to allocate very
 924	  large blocks of physically contiguous memory is required.
 925
 926	  The page size is not necessarily 4KB.  For example, on 64-bit
 927	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 928	  this in mind when choosing a value for this option.
 929
 930	  Don't change if unsure.
 931
 932config PPC_SUBPAGE_PROT
 933	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
 934	default n
 935	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
 936	help
 937	  This option adds support for system call to allow user programs
 938	  to set access permissions (read/write, readonly, or no access)
 939	  on the 4k subpages of each 64k page.
 940
 941	  If unsure, say N here.
 942
 943config PPC_PROT_SAO_LPAR
 944	bool "Support PROT_SAO mappings in LPARs"
 945	depends on PPC_BOOK3S_64
 946	help
 947	  This option adds support for PROT_SAO mappings from userspace
 948	  inside LPARs on supported CPUs.
 949
 950	  This may cause issues when performing guest migration from
 951	  a CPU that supports SAO to one that does not.
 952
 953	  If unsure, say N here.
 954
 955config PPC_COPRO_BASE
 956	bool
 957
 958config SCHED_SMT
 959	bool "SMT (Hyperthreading) scheduler support"
 960	depends on PPC64 && SMP
 961	help
 962	  SMT scheduler support improves the CPU scheduler's decision making
 963	  when dealing with POWER5 cpus at a cost of slightly increased
 964	  overhead in some places. If unsure say N here.
 965
 966config PPC_DENORMALISATION
 967	bool "PowerPC denormalisation exception handling"
 968	depends on PPC_BOOK3S_64
 969	default "y" if PPC_POWERNV
 970	help
 971	  Add support for handling denormalisation of single precision
 972	  values.  Useful for bare metal only.  If unsure say Y here.
 973
 
 
 
 974config CMDLINE
 975	string "Initial kernel command string"
 
 976	default ""
 977	help
 978	  On some platforms, there is currently no way for the boot loader to
 979	  pass arguments to the kernel. For these platforms, you can supply
 980	  some command-line options at build time by entering them here.  In
 981	  most cases you will need to specify the root device here.
 982
 983choice
 984	prompt "Kernel command line type" if CMDLINE != ""
 985	default CMDLINE_FROM_BOOTLOADER
 986
 987config CMDLINE_FROM_BOOTLOADER
 988	bool "Use bootloader kernel arguments if available"
 989	help
 990	  Uses the command-line options passed by the boot loader. If
 991	  the boot loader doesn't provide any, the default kernel command
 992	  string provided in CMDLINE will be used.
 993
 994config CMDLINE_EXTEND
 995	bool "Extend bootloader kernel arguments"
 996	help
 997	  The command-line arguments provided by the boot loader will be
 998	  appended to the default kernel command string.
 999
1000config CMDLINE_FORCE
1001	bool "Always use the default kernel command string"
 
1002	help
1003	  Always use the default kernel command string, even if the boot
1004	  loader passes other arguments to the kernel.
1005	  This is useful if you cannot or don't want to change the
1006	  command-line options your boot loader passes to the kernel.
1007
1008endchoice
1009
1010config EXTRA_TARGETS
1011	string "Additional default image types"
1012	help
1013	  List additional targets to be built by the bootwrapper here (separated
1014	  by spaces).  This is useful for targets that depend of device tree
1015	  files in the .dts directory.
1016
1017	  Targets in this list will be build as part of the default build
1018	  target, or when the user does a 'make zImage' or a
1019	  'make zImage.initrd'.
1020
1021	  If unsure, leave blank
1022
1023config ARCH_WANTS_FREEZER_CONTROL
1024	def_bool y
1025	depends on ADB_PMU
1026
1027source "kernel/power/Kconfig"
1028
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1029config PPC_MEM_KEYS
1030	prompt "PowerPC Memory Protection Keys"
1031	def_bool y
1032	depends on PPC_BOOK3S_64
1033	depends on PPC_64S_HASH_MMU
1034	select ARCH_USES_HIGH_VMA_FLAGS
1035	select ARCH_HAS_PKEYS
1036	help
1037	  Memory Protection Keys provides a mechanism for enforcing
1038	  page-based protections, but without requiring modification of the
1039	  page tables when an application changes protection domains.
1040
1041	  For details, see Documentation/core-api/protection-keys.rst
1042
1043	  If unsure, say y.
1044
1045config PPC_SECURE_BOOT
1046	prompt "Enable secure boot support"
1047	bool
1048	depends on PPC_POWERNV || PPC_PSERIES
1049	depends on IMA_ARCH_POLICY
1050	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
1051	select PSERIES_PLPKS if PPC_PSERIES
1052	help
1053	  Systems with firmware secure boot enabled need to define security
1054	  policies to extend secure boot to the OS. This config allows a user
1055	  to enable OS secure boot on systems that have firmware support for
1056	  it. If in doubt say N.
1057
1058config PPC_SECVAR_SYSFS
1059	bool "Enable sysfs interface for POWER secure variables"
1060	default y
1061	depends on PPC_SECURE_BOOT
1062	depends on SYSFS
1063	help
1064	  POWER secure variables are managed and controlled by firmware.
1065	  These variables are exposed to userspace via sysfs to enable
1066	  read/write operations on these variables. Say Y if you have
1067	  secure boot enabled and want to expose variables to userspace.
1068
1069endmenu
1070
1071config ISA_DMA_API
1072	bool
1073	default PCI
1074
1075menu "Bus options"
1076
1077config ISA
1078	bool "Support for ISA-bus hardware"
1079	depends on PPC_CHRP
1080	select PPC_I8259
1081	help
1082	  Find out whether you have ISA slots on your motherboard.  ISA is the
1083	  name of a bus system, i.e. the way the CPU talks to the other stuff
1084	  inside your box.  If you have an Apple machine, say N here; if you
1085	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1086	  embedded board, consult your board documentation.
1087
1088config GENERIC_ISA_DMA
1089	bool
1090	depends on ISA_DMA_API
1091	default y
1092
1093config PPC_INDIRECT_PCI
1094	bool
1095	depends on PCI
1096	default y if 40x || 44x
1097
1098config SBUS
1099	bool
1100
1101config FSL_SOC
1102	bool
1103
1104config FSL_PCI
1105	bool
1106	select ARCH_HAS_DMA_SET_MASK
1107	select PPC_INDIRECT_PCI
1108	select PCI_QUIRKS
1109
1110config FSL_PMC
1111	bool
1112	default y
1113	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1114	help
1115	  Freescale MPC85xx/MPC86xx power management controller support
1116	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1117
1118config PPC4xx_CPM
1119	bool
1120	default y
1121	depends on SUSPEND && (44x || 40x)
1122	help
1123	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1124	  It also enables support for two different idle states (idle-wait
1125	  and idle-doze).
1126
1127config 4xx_SOC
1128	bool
1129
1130config FSL_LBC
1131	bool "Freescale Local Bus support"
1132	help
1133	  Enables reporting of errors from the Freescale local bus
1134	  controller.  Also contains some common code used by
1135	  drivers for specific local bus peripherals.
1136
1137config FSL_GTM
1138	bool
1139	depends on PPC_83xx || QUICC_ENGINE || CPM2
1140	help
1141	  Freescale General-purpose Timers support
1142
 
 
 
 
 
 
1143config FSL_RIO
1144	bool "Freescale Embedded SRIO Controller support"
1145	depends on RAPIDIO = y && HAVE_RAPIDIO
1146	default "n"
1147	help
1148	  Include support for RapidIO controller on Freescale embedded
1149	  processors (MPC8548, MPC8641, etc).
1150
1151endmenu
1152
1153config NONSTATIC_KERNEL
1154	bool
1155
1156menu "Advanced setup"
1157	depends on PPC32
1158
1159config ADVANCED_OPTIONS
1160	bool "Prompt for advanced kernel configuration options"
1161	help
1162	  This option will enable prompting for a variety of advanced kernel
1163	  configuration options.  These options can cause the kernel to not
1164	  work if they are set incorrectly, but can be used to optimize certain
1165	  aspects of kernel memory management.
1166
1167	  Unless you know what you are doing, say N here.
1168
1169comment "Default settings for advanced configuration options are used"
1170	depends on !ADVANCED_OPTIONS
1171
1172config LOWMEM_SIZE_BOOL
1173	bool "Set maximum low memory"
1174	depends on ADVANCED_OPTIONS
1175	help
1176	  This option allows you to set the maximum amount of memory which
1177	  will be used as "low memory", that is, memory which the kernel can
1178	  access directly, without having to set up a kernel virtual mapping.
1179	  This can be useful in optimizing the layout of kernel virtual
1180	  memory.
1181
1182	  Say N here unless you know what you are doing.
1183
1184config LOWMEM_SIZE
1185	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1186	default "0x30000000"
1187
1188config LOWMEM_CAM_NUM_BOOL
1189	bool "Set number of CAMs to use to map low memory"
1190	depends on ADVANCED_OPTIONS && PPC_85xx
1191	help
1192	  This option allows you to set the maximum number of CAM slots that
1193	  will be used to map low memory.  There are a limited number of slots
1194	  available and even more limited number that will fit in the L1 MMU.
1195	  However, using more entries will allow mapping more low memory.  This
1196	  can be useful in optimizing the layout of kernel virtual memory.
1197
1198	  Say N here unless you know what you are doing.
1199
1200config LOWMEM_CAM_NUM
1201	depends on PPC_85xx
1202	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1203	default 3 if !STRICT_KERNEL_RWX
1204	default 9 if DATA_SHIFT >= 24
1205	default 12 if DATA_SHIFT >= 22
1206	default 15
1207
1208config DYNAMIC_MEMSTART
1209	bool "Enable page aligned dynamic load address for kernel"
1210	depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x)
1211	select NONSTATIC_KERNEL
1212	help
1213	  This option enables the kernel to be loaded at any page aligned
1214	  physical address. The kernel creates a mapping from KERNELBASE to
1215	  the address where the kernel is loaded. The page size here implies
1216	  the TLB page size of the mapping for kernel on the particular platform.
1217	  Please refer to the init code for finding the TLB page size.
1218
1219	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1220	  kernel image, where the only restriction is the page aligned kernel
1221	  load address. When this option is enabled, the compile time physical
1222	  address CONFIG_PHYSICAL_START is ignored.
1223
1224	  This option is overridden by CONFIG_RELOCATABLE
1225
1226config PAGE_OFFSET_BOOL
1227	bool "Set custom page offset address"
1228	depends on ADVANCED_OPTIONS
1229	help
1230	  This option allows you to set the kernel virtual address at which
1231	  the kernel will map low memory.  This can be useful in optimizing
1232	  the virtual memory layout of the system.
1233
1234	  Say N here unless you know what you are doing.
1235
1236config PAGE_OFFSET
1237	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1238	default "0xc0000000"
1239
1240config KERNEL_START_BOOL
1241	bool "Set custom kernel base address"
1242	depends on ADVANCED_OPTIONS
1243	help
1244	  This option allows you to set the kernel virtual address at which
1245	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1246	  however there are times (like kdump) that one might not want them
1247	  to be the same.
1248
1249	  Say N here unless you know what you are doing.
1250
1251config KERNEL_START
1252	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1253	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1254	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1255	default "0xc0000000"
1256
1257config PHYSICAL_START_BOOL
1258	bool "Set physical address where the kernel is loaded"
1259	depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx
1260	help
1261	  This gives the physical address where the kernel is loaded.
1262
1263	  Say N here unless you know what you are doing.
1264
1265config PHYSICAL_START
1266	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1267	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1268	default "0x00000000"
1269
1270config PHYSICAL_ALIGN
1271	hex
1272	default "0x04000000" if PPC_85xx
1273	help
1274	  This value puts the alignment restrictions on physical address
1275	  where kernel is loaded and run from. Kernel is compiled for an
1276	  address which meets above alignment restriction.
1277
1278config TASK_SIZE_BOOL
1279	bool "Set custom user task size"
1280	depends on ADVANCED_OPTIONS
1281	help
1282	  This option allows you to set the amount of virtual address space
1283	  allocated to user tasks.  This can be useful in optimizing the
1284	  virtual memory layout of the system.
1285
1286	  Say N here unless you know what you are doing.
1287
1288config TASK_SIZE
1289	hex "Size of user task space" if TASK_SIZE_BOOL
1290	default "0x80000000" if PPC_8xx
1291	default "0xb0000000" if PPC_BOOK3S_32
1292	default "0xc0000000"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1293endmenu
1294
1295if PPC64
1296# This value must have zeroes in the bottom 60 bits otherwise lots will break
1297config PAGE_OFFSET
1298	hex
1299	default "0xc000000000000000"
1300config KERNEL_START
1301	hex
1302	default "0xc000000000000000"
1303config PHYSICAL_START
1304	hex
1305	default "0x00000000"
1306endif
 
 
 
1307
1308config PPC_LIB_RHEAP
1309	bool
1310
1311source "arch/powerpc/kvm/Kconfig"
1312
1313source "kernel/livepatch/Kconfig"