Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1254 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
new file mode 100644
index 000000000..78dd6be8b
--- /dev/null
+++ b/arch/powerpc/Kconfig
@@ -0,0 +1,1254 @@
+# 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 && SMP
+	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 || \
+		   (PPC_85xx && !PPC_E500MC) || 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 && !PPC_47x
+	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 "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
+	default y
+	depends on SUSPEND && (PPC_85xx || PPC_86xx)
+	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"