# SPDX-License-Identifier: GPL-2.0

  source "arch/powerpc/platforms/Kconfig.cputype"

  config 32BIT
  	bool
  	default y if PPC32

  config 64BIT
  	bool
  	default y if PPC64

  config MMU
  	bool
  	default y

  config ARCH_MMAP_RND_BITS_MAX
  	# On Book3S 64, the default virtual address space for 64-bit processes
  	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
  	# 32T of address space (2^45), which should ensure a reasonable gap
  	# between bottom-up and top-down allocations for applications that
  	# consume "normal" amounts of address space. Book3S 64 only supports 64K
  	# and 4K page sizes.
  	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
  	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
  	#
  	# On all other 64-bit platforms (currently only Book3E), the virtual
  	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
  	# of address space (2^44). Only 4K page sizes are supported.
  	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
  	#
  	# For 32-bit, use the compat values, as they're the same.
  	default ARCH_MMAP_RND_COMPAT_BITS_MAX
  
  config ARCH_MMAP_RND_BITS_MIN
  	# Allow randomisation to consume up to 1GB of address space (2^30).
  	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
  	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
  	#
  	# For 32-bit, use the compat values, as they're the same.
  	default ARCH_MMAP_RND_COMPAT_BITS_MIN
  
  config ARCH_MMAP_RND_COMPAT_BITS_MAX
  	# Total virtual address space for 32-bit processes is 2^31 (2GB).
  	# Allow randomisation to consume up to 512MB of address space (2^29).
  	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
  	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)

  	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)

  	default 17			# 17 = 29 (512MB) - 12 (4K)
  
  config ARCH_MMAP_RND_COMPAT_BITS_MIN
  	# Total virtual address space for 32-bit processes is 2^31 (2GB).
  	# Allow randomisation to consume up to 8MB of address space (2^23).
  	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
  	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
  	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
  	default 11			# 11 = 23 (8MB) - 12 (4K)

  config HAVE_SETUP_PER_CPU_AREA

  	def_bool PPC64

  config NEED_PER_CPU_EMBED_FIRST_CHUNK

  	def_bool y if PPC64
  
  config NEED_PER_CPU_PAGE_FIRST_CHUNK
  	def_bool y if PPC64

  config NR_IRQS
  	int "Number of virtual interrupt numbers"

  	range 32 32768

  	default "512"
  	help
  	  This defines the number of virtual interrupt numbers the kernel
  	  can manage. Virtual interrupt numbers are what you see in
  	  /proc/interrupts. If you configure your system to have too few,
  	  drivers will fail to load or worse - handle with care.

  config NMI_IPI
  	bool

  	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)

  	default y

  config PPC_WATCHDOG
  	bool
  	depends on HARDLOCKUP_DETECTOR
  	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
  	default y
  	help
  	  This is a placeholder when the powerpc hardlockup detector
  	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
  	  seleted via the generic lockup detector menu which is why we
  	  have no standalone config option for it here.

  config STACKTRACE_SUPPORT
  	bool
  	default y

  config TRACE_IRQFLAGS_SUPPORT
  	bool

  	default y
  
  config LOCKDEP_SUPPORT
  	bool
  	default y

  config GENERIC_LOCKBREAK
  	bool
  	default y

  	depends on SMP && PREEMPTION

  config GENERIC_HWEIGHT
  	bool
  	default y

  config PPC
  	bool
  	default y

  	#
  	# Please keep this list sorted alphabetically.
  	#

  	select ARCH_32BIT_OFF_T if PPC32

  	select ARCH_HAS_DEBUG_VIRTUAL

  	select ARCH_HAS_DEVMEM_IS_ALLOWED

  	select ARCH_HAS_ELF_RANDOMIZE

  	select ARCH_HAS_FORTIFY_SOURCE

  	select ARCH_HAS_GCOV_PROFILE_ALL

  	select ARCH_HAS_KCOV

  	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE

  	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN

  	select ARCH_HAS_MMIOWB			if PPC64

  	select ARCH_HAS_PHYS_TO_DMA

  	select ARCH_HAS_PMEM_API

  	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE

  	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64

  	select ARCH_HAS_PTE_SPECIAL

  	select ARCH_HAS_MEMBARRIER_CALLBACKS

  	select ARCH_HAS_MEMBARRIER_SYNC_CORE

  	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64

  	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC32 && !HIBERNATION)

  	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST

  	select ARCH_HAS_UACCESS_FLUSHCACHE

  	select ARCH_HAS_COPY_MC			if PPC64

  	select ARCH_HAS_UBSAN_SANITIZE_ALL
  	select ARCH_HAVE_NMI_SAFE_CMPXCHG

  	select ARCH_KEEP_MEMBLOCK

  	select ARCH_MIGHT_HAVE_PC_PARPORT

  	select ARCH_MIGHT_HAVE_PC_SERIO

  	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX

  	select ARCH_SUPPORTS_ATOMIC_RMW

  	select ARCH_USE_BUILTIN_BSWAP
  	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64

  	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
  	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS

  	select ARCH_WANT_IPC_PARSE_VERSION

  	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM

  	select ARCH_WANT_LD_ORPHAN_WARN

  	select ARCH_WEAK_RELEASE_ACQUIRE

  	select BINFMT_ELF

  	select BUILDTIME_TABLE_SORT

  	select CLONE_BACKWARDS
  	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN

  	select DMA_OPS				if PPC64

  	select DMA_OPS_BYPASS			if PPC64

  	select DYNAMIC_FTRACE			if FUNCTION_TRACER

  	select EDAC_ATOMIC_SCRUB
  	select EDAC_SUPPORT
  	select GENERIC_ATOMIC64			if PPC32
  	select GENERIC_CLOCKEVENTS
  	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
  	select GENERIC_CMOS_UPDATE
  	select GENERIC_CPU_AUTOPROBE

  	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC

  	select GENERIC_EARLY_IOREMAP

  	select GENERIC_IRQ_SHOW
  	select GENERIC_IRQ_SHOW_LEVEL

  	select GENERIC_PCI_IOMAP		if PCI

  	select GENERIC_SMP_IDLE_THREAD
  	select GENERIC_STRNCPY_FROM_USER
  	select GENERIC_STRNLEN_USER

  	select GENERIC_TIME_VSYSCALL

  	select HAVE_ARCH_AUDITSYSCALL

  	select HAVE_ARCH_HUGE_VMAP		if PPC_BOOK3S_64 && PPC_RADIX_MMU

  	select HAVE_ARCH_JUMP_LABEL

  	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
  	select HAVE_ARCH_KASAN_VMALLOC		if PPC32 && PPC_PAGE_SHIFT <= 14

  	select HAVE_ARCH_KGDB

  	select HAVE_ARCH_MMAP_RND_BITS
  	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT

  	select HAVE_ARCH_NVRAM_OPS

  	select HAVE_ARCH_SECCOMP_FILTER
  	select HAVE_ARCH_TRACEHOOK

  	select HAVE_ASM_MODVERSIONS

  	select HAVE_C_RECORDMCOUNT

  	select HAVE_CBPF_JIT			if !PPC64

  	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
  	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)

  	select HAVE_CONTEXT_TRACKING		if PPC64

  	select HAVE_TIF_NOHZ			if PPC64

  	select HAVE_DEBUG_KMEMLEAK
  	select HAVE_DEBUG_STACKOVERFLOW

  	select HAVE_DYNAMIC_FTRACE

  	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL
  	select HAVE_EBPF_JIT			if PPC64
  	select HAVE_EFFICIENT_UNALIGNED_ACCESS	if !(CPU_LITTLE_ENDIAN && POWER7_CPU)

  	select HAVE_FAST_GUP

  	select HAVE_FTRACE_MCOUNT_RECORD

  	select HAVE_FUNCTION_ERROR_INJECTION

  	select HAVE_FUNCTION_GRAPH_TRACER

  	select HAVE_FUNCTION_TRACER

  	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC

  	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)

  	select HAVE_IDE

  	select HAVE_IOREMAP_PROT

  	select HAVE_IRQ_EXIT_ON_IRQ_STACK
  	select HAVE_KERNEL_GZIP

  	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE

  	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE

  	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x

  	select HAVE_KPROBES

  	select HAVE_KPROBES_ON_FTRACE

  	select HAVE_KRETPROBES

  	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION

  	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS

  	select HAVE_MOD_ARCH_SPECIFIC

  	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
  	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if (PPC64 && PPC_BOOK3S)

  	select HAVE_OPROFILE

  	select HAVE_OPTPROBES			if PPC64

  	select HAVE_PERF_EVENTS

  	select HAVE_PERF_EVENTS_NMI		if PPC64

  	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH

  	select HAVE_PERF_REGS

  	select HAVE_PERF_USER_STACK_DUMP

  	select MMU_GATHER_RCU_TABLE_FREE

  	select MMU_GATHER_PAGE_SIZE

  	select HAVE_REGS_AND_STACK_ACCESS_API

  	select HAVE_RELIABLE_STACKTRACE		if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN

  	select HAVE_SYSCALL_TRACEPOINTS
  	select HAVE_VIRT_CPU_ACCOUNTING

  	select HAVE_IRQ_TIME_ACCOUNTING

  	select HAVE_RSEQ

  	select IOMMU_HELPER			if PPC64

  	select IRQ_DOMAIN

  	select IRQ_FORCED_THREADING

  	select MODULES_USE_ELF_RELA

  	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE

  	select NEED_SG_DMA_LENGTH

  	select OF

  	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE

  	select OF_EARLY_FLATTREE

  	select OLD_SIGACTION			if PPC32
  	select OLD_SIGSUSPEND

  	select PCI_DOMAINS			if PCI

  	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI

  	select PCI_SYSCALL			if PCI

  	select PPC_DAWR				if PPC64

  	select RTC_LIB

  	select SPARSE_IRQ
  	select SYSCTL_EXCEPTION_TRACE

  	select THREAD_INFO_IN_TASK

  	select VIRT_TO_BUS			if !PPC64
  	#
  	# Please keep this list sorted alphabetically.
  	#

  config PPC_BARRIER_NOSPEC

  	bool
  	default y
  	depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E

  config EARLY_PRINTK
  	bool

  	default y

  config PANIC_TIMEOUT
  	int
  	default 180

  config COMPAT

  	bool "Enable support for 32bit binaries"
  	depends on PPC64
  	default y if !CPU_LITTLE_ENDIAN

  	select COMPAT_BINFMT_ELF

  	select ARCH_WANT_OLD_COMPAT_IPC

  	select COMPAT_OLD_SIGACTION

  
  config SYSVIPC_COMPAT
  	bool
  	depends on COMPAT && SYSVIPC
  	default y

  config SCHED_OMIT_FRAME_POINTER

  	bool
  	default y
  
  config ARCH_MAY_HAVE_PC_FDC
  	bool

  	default PCI

  config PPC_UDBG_16550
  	bool

  config GENERIC_TBSYNC
  	bool
  	default y if PPC32 && SMP

  config AUDIT_ARCH
  	bool
  	default y

  config GENERIC_BUG
  	bool
  	default y
  	depends on BUG

  config SYS_SUPPORTS_APM_EMULATION

  	default y if PMAC_APM_EMU

  	bool

  config EPAPR_BOOT
  	bool
  	help
  	  Used to allow a board to specify it wants an ePAPR compliant wrapper.

  config DEFAULT_UIMAGE
  	bool
  	help
  	  Used to allow a board to specify it wants a uImage built by default

  config ARCH_HIBERNATION_POSSIBLE
  	bool

  	default y

  config ARCH_SUSPEND_POSSIBLE
  	def_bool y

  	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \

  		   FSL_SOC_BOOKE || PPC_86xx || PPC_PSERIES \

  		   || 44x || 40x

  config ARCH_SUSPEND_NONZERO_CPU
  	def_bool y
  	depends on PPC_POWERNV || PPC_PSERIES

  config PPC_DCR_NATIVE
  	bool

  
  config PPC_DCR_MMIO
  	bool

  
  config PPC_DCR
  	bool
  	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  	default y

  config PPC_OF_PLATFORM_PCI
  	bool

  	depends on PCI

  	depends on PPC64 # not supported on 32 bits yet

  config ARCH_SUPPORTS_DEBUG_PAGEALLOC

  	depends on PPC32 || PPC_BOOK3S_64

  	def_bool y

  config ARCH_SUPPORTS_UPROBES
  	def_bool y

  config PPC_ADV_DEBUG_REGS
  	bool
  	depends on 40x || BOOKE
  	default y
  
  config PPC_ADV_DEBUG_IACS
  	int
  	depends on PPC_ADV_DEBUG_REGS
  	default 4 if 44x
  	default 2
  
  config PPC_ADV_DEBUG_DACS
  	int
  	depends on PPC_ADV_DEBUG_REGS
  	default 2
  
  config PPC_ADV_DEBUG_DVCS
  	int
  	depends on PPC_ADV_DEBUG_REGS
  	default 2 if 44x
  	default 0
  
  config PPC_ADV_DEBUG_DAC_RANGE
  	bool
  	depends on PPC_ADV_DEBUG_REGS && 44x
  	default y

  config PPC_DAWR
  	bool

  config ZONE_DMA

  	bool

  	default y if PPC_BOOK3E_64

  config PGTABLE_LEVELS
  	int
  	default 2 if !PPC64

  	default 4

  source "arch/powerpc/sysdev/Kconfig"

  source "arch/powerpc/platforms/Kconfig"

  menu "Kernel options"
  
  config HIGHMEM
  	bool "High memory support"
  	depends on PPC32

  source "kernel/Kconfig.hz"

  config HUGETLB_PAGE_SIZE_VARIABLE
  	bool

  	depends on HUGETLB_PAGE && PPC_BOOK3S_64

  	default y

  config MATH_EMULATION
  	bool "Math emulation"

  	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE

  	help

  	  Some PowerPC chips designed for embedded applications do not have
  	  a floating-point unit and therefore do not implement the
  	  floating-point instructions in the PowerPC instruction set.  If you
  	  say Y here, the kernel will include code to emulate a floating-point
  	  unit, which will allow programs that use floating-point
  	  instructions to run.

  	  This is also useful to emulate missing (optional) instructions
  	  such as fsqrt on cores that do have an FPU but do not implement
  	  them (such as Freescale BookE).

  choice
  	prompt "Math emulation options"
  	default MATH_EMULATION_FULL
  	depends on MATH_EMULATION
  
  config	MATH_EMULATION_FULL
  	bool "Emulate all the floating point instructions"

  	help

  	  Select this option will enable the kernel to support to emulate
  	  all the floating point instructions. If your SoC doesn't have
  	  a FPU, you should select this.
  
  config MATH_EMULATION_HW_UNIMPLEMENTED
  	bool "Just emulate the FPU unimplemented instructions"

  	help

  	  Select this if you know there does have a hardware FPU on your
  	  SoC, but some floating point instructions are not implemented by that.
  
  endchoice

  config PPC_TRANSACTIONAL_MEM

  	bool "Transactional Memory support for POWERPC"
  	depends on PPC_BOOK3S_64
  	depends on SMP
  	select ALTIVEC
  	select VSX
  	help
  	  Support user-mode Transactional Memory on POWERPC.

  config PPC_UV
  	bool "Ultravisor support"
  	depends on KVM_BOOK3S_HV_POSSIBLE

  	depends on DEVICE_PRIVATE

  	default n
  	help
  	  This option paravirtualizes the kernel to run in POWER platforms that
  	  supports the Protected Execution Facility (PEF). On such platforms,
  	  the ultravisor firmware runs at a privilege level above the
  	  hypervisor.
  
  	  If unsure, say "N".

  config LD_HEAD_STUB_CATCH
  	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
  	depends on PPC64

  	help
  	  Very large kernels can cause linker branch stubs to be generated by
  	  code in head_64.S, which moves the head text sections out of their
  	  specified location. This option can work around the problem.
  
  	  If unsure, say "N".

  config MPROFILE_KERNEL

  	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER

  	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)

  config HOTPLUG_CPU
  	bool "Support for enabling/disabling CPUs"

  	depends on SMP && (PPC_PSERIES || \

  		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)

  	help

  	  Say Y here to be able to disable and re-enable individual
  	  CPUs at runtime on SMP machines.
  
  	  Say N if you are unsure.

  config PPC_QUEUED_SPINLOCKS
  	bool "Queued spinlocks"
  	depends on SMP
  	help
  	  Say Y here to use queued spinlocks which give better scalability and
  	  fairness on large SMP and NUMA systems without harming single threaded
  	  performance.
  
  	  This option is currently experimental, the code is more complex and
  	  less tested so it defaults to "N" for the moment.
  
  	  If unsure, say "N".

  config ARCH_CPU_PROBE_RELEASE
  	def_bool y
  	depends on HOTPLUG_CPU

  config ARCH_ENABLE_MEMORY_HOTPLUG
  	def_bool y

  config ARCH_ENABLE_MEMORY_HOTREMOVE
  	def_bool y

  config PPC64_SUPPORTS_MEMORY_FAILURE
  	bool "Add support for memory hwpoison"
  	depends on PPC_BOOK3S_64
  	default "y" if PPC_POWERNV
  	select ARCH_SUPPORTS_MEMORY_FAILURE

  config KEXEC

  	bool "kexec system call"

  	depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E

  	select KEXEC_CORE

  	help
  	  kexec is a system call that implements the ability to shutdown your
  	  current kernel, and to start another kernel.  It is like a reboot

  	  but it is independent of the system firmware.   And like a reboot

  	  you can start any kernel with it, not just Linux.

  	  The name comes from the similarity to the exec system call.

  
  	  It is an ongoing process to be certain the hardware in a machine
  	  is properly shutdown, so do not be surprised if this code does not

  	  initially work for you.  As of this writing the exact hardware
  	  interface is strongly in flux, so no good recommendation can be
  	  made.

  config KEXEC_FILE
  	bool "kexec file based system call"
  	select KEXEC_CORE

  	select HAVE_IMA_KEXEC

  	select BUILD_BIN2C

  	select KEXEC_ELF

  	depends on PPC64
  	depends on CRYPTO=y
  	depends on CRYPTO_SHA256=y
  	help
  	  This is a new version of the kexec system call. This call is
  	  file based and takes in file descriptors as system call arguments
  	  for kernel and initramfs as opposed to a list of segments as is the
  	  case for the older kexec call.

  config ARCH_HAS_KEXEC_PURGATORY
  	def_bool KEXEC_FILE

  config RELOCATABLE
  	bool "Build a relocatable kernel"

  	depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))

  	select NONSTATIC_KERNEL

  	select MODULE_REL_CRCS if MODVERSIONS

  	help
  	  This builds a kernel image that is capable of running at the
  	  location the kernel is loaded at. For ppc32, there is no any
  	  alignment restrictions, and this feature is a superset of
  	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
  	  16k-aligned base address. The kernel is linked as a
  	  position-independent executable (PIE) and contains dynamic relocations
  	  which are processed early in the bootup process.
  
  	  One use is for the kexec on panic case where the recovery kernel
  	  must live at a different physical address than the primary
  	  kernel.
  
  	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  	  it has been loaded at and the compile time physical addresses
  	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
  	  setting can still be useful to bootwrappers that need to know the
  	  load address of the kernel (eg. u-boot/mkimage).

  config RANDOMIZE_BASE
  	bool "Randomize the address of the kernel image"
  	depends on (FSL_BOOKE && FLATMEM && PPC32)
  	depends on RELOCATABLE
  	help
  	  Randomizes the virtual address at which the kernel image is
  	  loaded, as a security feature that deters exploit attempts
  	  relying on knowledge of the location of kernel internals.
  
  	  If unsure, say Y.

  config RELOCATABLE_TEST
  	bool "Test relocatable kernel"
  	depends on (PPC64 && RELOCATABLE)

  	help
  	  This runs the relocatable kernel at the address it was initially
  	  loaded at, which tends to be non-zero and therefore test the
  	  relocation code.

  config CRASH_DUMP

  	bool "Build a dump capture kernel"

  	depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)

  	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE

  	help

  	  Build a kernel suitable for use as a dump capture kernel.

  	  The same kernel binary can be used as production kernel and dump
  	  capture kernel.

  config FA_DUMP
  	bool "Firmware-assisted dump"

  	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)

  	select CRASH_CORE
  	select CRASH_DUMP

  	help

  	  A robust mechanism to get reliable kernel crash dump with
  	  assistance from firmware. This approach does not use kexec,

  	  instead firmware assists in booting the capture kernel

  	  while preserving memory contents. Firmware-assisted dump
  	  is meant to be a kdump replacement offering robustness and
  	  speed not possible without system firmware assistance.

  	  If unsure, say "y". Only special kernels like petitboot may
  	  need to say "N" here.

  config PRESERVE_FA_DUMP
  	bool "Preserve Firmware-assisted dump"
  	depends on PPC64 && PPC_POWERNV && !FA_DUMP
  	help
  	  On a kernel with FA_DUMP disabled, this option helps to preserve
  	  crash data from a previously crash'ed kernel. Useful when the next
  	  memory preserving kernel boot would process this crash data.
  	  Petitboot kernel is the typical usecase for this option.

  config OPAL_CORE
  	bool "Export OPAL memory as /sys/firmware/opal/core"
  	depends on PPC64 && PPC_POWERNV
  	help
  	  This option uses the MPIPL support in firmware to provide an
  	  ELF core of OPAL memory after a crash. The ELF core is exported
  	  as /sys/firmware/opal/core file which is helpful in debugging
  	  OPAL crashes using GDB.

  config IRQ_ALL_CPUS
  	bool "Distribute interrupts on all CPUs by default"

  	depends on SMP

  	help
  	  This option gives the kernel permission to distribute IRQs across
  	  multiple CPUs.  Saying N here will route all IRQs to the first
  	  CPU.  Generally saying Y is safe, although some problems have been
  	  reported with SMP Power Macintoshes with this option enabled.

  config NUMA
  	bool "NUMA support"
  	depends on PPC64
  	default y if SMP && PPC_PSERIES

  config NODES_SHIFT
  	int

  	default "8" if PPC64

  	default "4"
  	depends on NEED_MULTIPLE_NODES

  config USE_PERCPU_NUMA_NODE_ID
  	def_bool y
  	depends on NUMA

  config HAVE_MEMORYLESS_NODES
  	def_bool y
  	depends on NUMA

  config ARCH_SELECT_MEMORY_MODEL
  	def_bool y
  	depends on PPC64
  
  config ARCH_FLATMEM_ENABLE

  	def_bool y
  	depends on (PPC64 && !NUMA) || PPC32

  config ARCH_SPARSEMEM_ENABLE

  	def_bool y

  	depends on PPC64

  	select SPARSEMEM_VMEMMAP_ENABLE

  config ARCH_SPARSEMEM_DEFAULT

  	def_bool y

  	depends on PPC_BOOK3S_64

  config SYS_SUPPORTS_HUGETLBFS

  	bool

  config ILLEGAL_POINTER_VALUE
  	hex
  	# This is roughly half way between the top of user space and the bottom
  	# of kernel space, which seems about as good as we can get.
  	default 0x5deadbeef0000000 if PPC64
  	default 0

  config ARCH_MEMORY_PROBE
  	def_bool y
  	depends on MEMORY_HOTPLUG

  config STDBINUTILS
  	bool "Using standard binutils settings"
  	depends on 44x
  	default y
  	help
  	  Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  	  Note, that kernel will be able to run only those applications,
  	  which had been compiled using binutils later than 2.17.50.0.3 with
  	  '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  	  the older binutils, you can patch them with a trivial patch, which
  	  changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.

  choice
  	prompt "Page size"
  	default PPC_4K_PAGES

  	help

  	  Select the kernel logical page size. Increasing the page size
  	  will reduce software overhead at each page boundary, allow
  	  hardware prefetch mechanisms to be more effective, and allow
  	  larger dma transfers increasing IO efficiency and reducing
  	  overhead. However the utilization of memory will increase.
  	  For example, each cached file will using a multiple of the
  	  page size to hold its contents and the difference between the
  	  end of file and the end of page is wasted.
  
  	  Some dedicated systems, such as software raid serving with
  	  accelerated calculations, have shown significant increases.
  
  	  If you configure a 64 bit kernel for 64k pages but the
  	  processor does not support them, then the kernel will simulate
  	  them with 4k pages, loading them on demand, but with the
  	  reduced software overhead and larger internal fragmentation.
  	  For the 32 bit kernel, a large page option will not be offered
  	  unless it is supported by the configured processor.
  
  	  If unsure, choose 4K_PAGES.
  
  config PPC_4K_PAGES
  	bool "4k page size"

  	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64

  
  config PPC_16K_PAGES

  	bool "16k page size"

  	depends on 44x || PPC_8xx

  
  config PPC_64K_PAGES

  	bool "64k page size"

  	depends on 44x || PPC_BOOK3S_64

  	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64

  config PPC_256K_PAGES

  	bool "256k page size"
  	depends on 44x && !STDBINUTILS

  	help
  	  Make the page size 256k.
  
  	  As the ELF standard only requires alignment to support page
  	  sizes up to 64k, you will need to compile all of your user
  	  space applications with a non-standard binutils settings
  	  (see the STDBINUTILS description for details).
  
  	  Say N unless you know what you are doing.

  endchoice

  config PPC_PAGE_SHIFT
  	int
  	default 18 if PPC_256K_PAGES
  	default 16 if PPC_64K_PAGES
  	default 14 if PPC_16K_PAGES
  	default 12

  config THREAD_SHIFT
  	int "Thread shift" if EXPERT
  	range 13 15
  	default "15" if PPC_256K_PAGES
  	default "14" if PPC64

  	default "14" if KASAN

  	default "13"
  	help
  	  Used to define the stack size. The default is almost always what you
  	  want. Only change this if you know what you are doing.

  config DATA_SHIFT_BOOL

  	bool "Set custom data alignment"

  	depends on ADVANCED_OPTIONS

  	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC
  	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && \
  				     (!PIN_TLB_TEXT || !STRICT_KERNEL_RWX))

  	help
  	  This option allows you to set the kernel data alignment. When
  	  RAM is mapped by blocks, the alignment needs to fit the size and
  	  number of possible blocks. The default should be OK for most configs.
  
  	  Say N here unless you know what you are doing.

  
  config DATA_SHIFT

  	int "Data shift" if DATA_SHIFT_BOOL

  	default 24 if STRICT_KERNEL_RWX && PPC64

  	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC) && PPC_BOOK3S_32
  	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC) && PPC_8xx

  	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32

  	default 18 if DEBUG_PAGEALLOC && PPC_BOOK3S_32

  	default 23 if STRICT_KERNEL_RWX && PPC_8xx

  	default 23 if DEBUG_PAGEALLOC && PPC_8xx && PIN_TLB_DATA
  	default 19 if DEBUG_PAGEALLOC && PPC_8xx

  	default PPC_PAGE_SHIFT

  	help
  	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
  	  Smaller is the alignment, greater is the number of necessary DBATs.

  	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
  	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used

  	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
  	  8M pages will be pinned.

  config FORCE_MAX_ZONEORDER
  	int "Maximum zone order"

  	range 8 9 if PPC64 && PPC_64K_PAGES

  	default "9" if PPC64 && PPC_64K_PAGES

  	range 13 13 if PPC64 && !PPC_64K_PAGES

  	default "13" if PPC64 && !PPC_64K_PAGES
  	range 9 64 if PPC32 && PPC_16K_PAGES
  	default "9" if PPC32 && PPC_16K_PAGES
  	range 7 64 if PPC32 && PPC_64K_PAGES
  	default "7" if PPC32 && PPC_64K_PAGES
  	range 5 64 if PPC32 && PPC_256K_PAGES
  	default "5" if PPC32 && PPC_256K_PAGES

  	range 11 64

  	default "11"
  	help
  	  The kernel memory allocator divides physically contiguous memory
  	  blocks into "zones", where each zone is a power of two number of
  	  pages.  This option selects the largest power of two that the kernel
  	  keeps in the memory allocator.  If you need to allocate very large
  	  blocks of physically contiguous memory, then you may need to
  	  increase this value.
  
  	  This config option is actually maximum order plus one. For example,
  	  a value of 11 means that the largest free memory block is 2^10 pages.
  
  	  The page size is not necessarily 4KB.  For example, on 64-bit
  	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
  	  this in mind when choosing a value for this option.

  config PPC_SUBPAGE_PROT

  	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
  	default n

  	depends on PPC_BOOK3S_64 && PPC_64K_PAGES

  	help

  	  This option adds support for system call to allow user programs

  	  to set access permissions (read/write, readonly, or no access)
  	  on the 4k subpages of each 64k page.

  	  If unsure, say N here.

  config PPC_PROT_SAO_LPAR
  	bool "Support PROT_SAO mappings in LPARs"
  	depends on PPC_BOOK3S_64
  	help
  	  This option adds support for PROT_SAO mappings from userspace
  	  inside LPARs on supported CPUs.
  
  	  This may cause issues when performing guest migration from
  	  a CPU that supports SAO to one that does not.
  
  	  If unsure, say N here.

  config PPC_COPRO_BASE
  	bool

  config SCHED_SMT
  	bool "SMT (Hyperthreading) scheduler support"
  	depends on PPC64 && SMP

  	help
  	  SMT scheduler support improves the CPU scheduler's decision making
  	  when dealing with POWER5 cpus at a cost of slightly increased
  	  overhead in some places. If unsure say N here.

  config PPC_DENORMALISATION
  	bool "PowerPC denormalisation exception handling"
  	depends on PPC_BOOK3S_64

  	default "y" if PPC_POWERNV

  	help

  	  Add support for handling denormalisation of single precision
  	  values.  Useful for bare metal only.  If unsure say Y here.

  config CMDLINE

  	string "Initial kernel command string"

  	default ""

  	help
  	  On some platforms, there is currently no way for the boot loader to
  	  pass arguments to the kernel. For these platforms, you can supply
  	  some command-line options at build time by entering them here.  In
  	  most cases you will need to specify the root device here.

  choice
  	prompt "Kernel command line type" if CMDLINE != ""
  	default CMDLINE_FROM_BOOTLOADER
  
  config CMDLINE_FROM_BOOTLOADER
  	bool "Use bootloader kernel arguments if available"
  	help
  	  Uses the command-line options passed by the boot loader. If
  	  the boot loader doesn't provide any, the default kernel command
  	  string provided in CMDLINE will be used.
  
  config CMDLINE_EXTEND
  	bool "Extend bootloader kernel arguments"
  	help
  	  The command-line arguments provided by the boot loader will be
  	  appended to the default kernel command string.

  config CMDLINE_FORCE
  	bool "Always use the default kernel command string"

  	help
  	  Always use the default kernel command string, even if the boot
  	  loader passes other arguments to the kernel.
  	  This is useful if you cannot or don't want to change the
  	  command-line options your boot loader passes to the kernel.

  endchoice

  config EXTRA_TARGETS
  	string "Additional default image types"
  	help
  	  List additional targets to be built by the bootwrapper here (separated
  	  by spaces).  This is useful for targets that depend of device tree
  	  files in the .dts directory.
  
  	  Targets in this list will be build as part of the default build
  	  target, or when the user does a 'make zImage' or a
  	  'make zImage.initrd'.
  
  	  If unsure, leave blank

  config ARCH_WANTS_FREEZER_CONTROL
  	def_bool y
  	depends on ADB_PMU

  source "kernel/power/Kconfig"

  config PPC_MEM_KEYS
  	prompt "PowerPC Memory Protection Keys"
  	def_bool y
  	depends on PPC_BOOK3S_64
  	select ARCH_USES_HIGH_VMA_FLAGS
  	select ARCH_HAS_PKEYS
  	help
  	  Memory Protection Keys provides a mechanism for enforcing
  	  page-based protections, but without requiring modification of the
  	  page tables when an application changes protection domains.

  	  For details, see Documentation/core-api/protection-keys.rst

  
  	  If unsure, say y.

  config PPC_SECURE_BOOT
  	prompt "Enable secure boot support"
  	bool

  	depends on PPC_POWERNV || PPC_PSERIES

  	depends on IMA_ARCH_POLICY

  	imply IMA_SECURE_AND_OR_TRUSTED_BOOT

  	help
  	  Systems with firmware secure boot enabled need to define security
  	  policies to extend secure boot to the OS. This config allows a user
  	  to enable OS secure boot on systems that have firmware support for
  	  it. If in doubt say N.

  config PPC_SECVAR_SYSFS
  	bool "Enable sysfs interface for POWER secure variables"
  	default y
  	depends on PPC_SECURE_BOOT
  	depends on SYSFS
  	help
  	  POWER secure variables are managed and controlled by firmware.
  	  These variables are exposed to userspace via sysfs to enable
  	  read/write operations on these variables. Say Y if you have
  	  secure boot enabled and want to expose variables to userspace.

  config PPC_RTAS_FILTER
  	bool "Enable filtering of RTAS syscalls"
  	default y
  	depends on PPC_RTAS
  	help
  	  The RTAS syscall API has security issues that could be used to
  	  compromise system integrity. This option enforces restrictions on the
  	  RTAS calls and arguments passed by userspace programs to mitigate
  	  these issues.
  
  	  Say Y unless you know what you are doing and the filter is causing
  	  problems for you.

  endmenu
  
  config ISA_DMA_API
  	bool

  	default PCI

  
  menu "Bus options"
  
  config ISA
  	bool "Support for ISA-bus hardware"

  	depends on PPC_CHRP

  	select PPC_I8259

  	help
  	  Find out whether you have ISA slots on your motherboard.  ISA is the
  	  name of a bus system, i.e. the way the CPU talks to the other stuff
  	  inside your box.  If you have an Apple machine, say N here; if you

  	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
  	  embedded board, consult your board documentation.

  
  config GENERIC_ISA_DMA
  	bool

  	depends on ISA_DMA_API

  	default y

  config PPC_INDIRECT_PCI
  	bool
  	depends on PCI

  	default y if 40x || 44x

  config SBUS
  	bool

  config FSL_SOC
  	bool

  config FSL_PCI

  	bool

  	select ARCH_HAS_DMA_SET_MASK

  	select PPC_INDIRECT_PCI

  	select PCI_QUIRKS

  config FSL_PMC
  	bool

  	help
  	  Freescale MPC85xx/MPC86xx power management controller support
  	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c

  config PPC4xx_CPM
  	bool
  	default y
  	depends on SUSPEND && (44x || 40x)
  	help
  	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
  	  It also enables support for two different idle states (idle-wait
  	  and idle-doze).

  config 4xx_SOC
  	bool

  config FSL_LBC

  	bool "Freescale Local Bus support"

  	help

  	  Enables reporting of errors from the Freescale local bus
  	  controller.  Also contains some common code used by
  	  drivers for specific local bus peripherals.

  config FSL_GTM
  	bool
  	depends on PPC_83xx || QUICC_ENGINE || CPM2
  	help
  	  Freescale General-purpose Timers support

  config PCI_8260
  	bool
  	depends on PCI && 8260

  	select PPC_INDIRECT_PCI

  	default y

  config FSL_RIO
  	bool "Freescale Embedded SRIO Controller support"

  	depends on RAPIDIO = y && HAVE_RAPIDIO

  	default "n"

  	help

  	  Include support for RapidIO controller on Freescale embedded
  	  processors (MPC8548, MPC8641, etc).

  endmenu

  config NONSTATIC_KERNEL
  	bool

  menu "Advanced setup"
  	depends on PPC32
  
  config ADVANCED_OPTIONS
  	bool "Prompt for advanced kernel configuration options"
  	help
  	  This option will enable prompting for a variety of advanced kernel
  	  configuration options.  These options can cause the kernel to not
  	  work if they are set incorrectly, but can be used to optimize certain
  	  aspects of kernel memory management.
  
  	  Unless you know what you are doing, say N here.
  
  comment "Default settings for advanced configuration options are used"
  	depends on !ADVANCED_OPTIONS

  config LOWMEM_SIZE_BOOL
  	bool "Set maximum low memory"
  	depends on ADVANCED_OPTIONS
  	help
  	  This option allows you to set the maximum amount of memory which
  	  will be used as "low memory", that is, memory which the kernel can
  	  access directly, without having to set up a kernel virtual mapping.
  	  This can be useful in optimizing the layout of kernel virtual
  	  memory.
  
  	  Say N here unless you know what you are doing.
  
  config LOWMEM_SIZE
  	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  	default "0x30000000"

  config LOWMEM_CAM_NUM_BOOL
  	bool "Set number of CAMs to use to map low memory"
  	depends on ADVANCED_OPTIONS && FSL_BOOKE
  	help
  	  This option allows you to set the maximum number of CAM slots that
  	  will be used to map low memory.  There are a limited number of slots
  	  available and even more limited number that will fit in the L1 MMU.
  	  However, using more entries will allow mapping more low memory.  This
  	  can be useful in optimizing the layout of kernel virtual memory.
  
  	  Say N here unless you know what you are doing.
  
  config LOWMEM_CAM_NUM

  	depends on FSL_BOOKE

  	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  	default 3

  config DYNAMIC_MEMSTART

  	bool "Enable page aligned dynamic load address for kernel"
  	depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)

  	select NONSTATIC_KERNEL
  	help
  	  This option enables the kernel to be loaded at any page aligned

  	  physical address. The kernel creates a mapping from KERNELBASE to

  	  the address where the kernel is loaded. The page size here implies
  	  the TLB page size of the mapping for kernel on the particular platform.
  	  Please refer to the init code for finding the TLB page size.
  
  	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
  	  kernel image, where the only restriction is the page aligned kernel

  	  load address. When this option is enabled, the compile time physical

  	  address CONFIG_PHYSICAL_START is ignored.

  	  This option is overridden by CONFIG_RELOCATABLE

  config PAGE_OFFSET_BOOL
  	bool "Set custom page offset address"
  	depends on ADVANCED_OPTIONS
  	help
  	  This option allows you to set the kernel virtual address at which
  	  the kernel will map low memory.  This can be useful in optimizing
  	  the virtual memory layout of the system.
  
  	  Say N here unless you know what you are doing.
  
  config PAGE_OFFSET
  	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  	default "0xc0000000"

  config KERNEL_START_BOOL
  	bool "Set custom kernel base address"
  	depends on ADVANCED_OPTIONS
  	help
  	  This option allows you to set the kernel virtual address at which

  	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
  	  however there are times (like kdump) that one might not want them
  	  to be the same.

  
  	  Say N here unless you know what you are doing.
  
  config KERNEL_START
  	hex "Virtual address of kernel base" if KERNEL_START_BOOL

  	default PAGE_OFFSET if PAGE_OFFSET_BOOL

  	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL

  	default "0xc0000000"

  config PHYSICAL_START_BOOL
  	bool "Set physical address where the kernel is loaded"
  	depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  	help
  	  This gives the physical address where the kernel is loaded.
  
  	  Say N here unless you know what you are doing.
  
  config PHYSICAL_START
  	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL

  	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL

  	default "0x00000000"
  
  config PHYSICAL_ALIGN
  	hex

  	default "0x04000000" if FSL_BOOKE

  	help
  	  This value puts the alignment restrictions on physical address
  	  where kernel is loaded and run from. Kernel is compiled for an
  	  address which meets above alignment restriction.

  config TASK_SIZE_BOOL
  	bool "Set custom user task size"
  	depends on ADVANCED_OPTIONS
  	help
  	  This option allows you to set the amount of virtual address space
  	  allocated to user tasks.  This can be useful in optimizing the
  	  virtual memory layout of the system.
  
  	  Say N here unless you know what you are doing.
  
  config TASK_SIZE
  	hex "Size of user task space" if TASK_SIZE_BOOL

  	default "0x80000000" if PPC_8xx

  	default "0xb0000000" if PPC_BOOK3S_32 && STRICT_KERNEL_RWX

  	default "0xc0000000"

  endmenu

  if PPC64

  # This value must have zeroes in the bottom 60 bits otherwise lots will break

  config PAGE_OFFSET
  	hex
  	default "0xc000000000000000"

  config KERNEL_START
  	hex

  	default "0xc000000000000000"

  config PHYSICAL_START
  	hex

  	default "0x00000000"

  endif

  config	ARCH_RANDOM
  	def_bool n

  config PPC_LIB_RHEAP
  	bool

  source "arch/powerpc/kvm/Kconfig"

  
  source "kernel/livepatch/Kconfig"