Kconfig

# 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 1048576
	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
	  selected 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_SUPPORTS_DEBUG_PAGEALLOC	if PPC32 || PPC_BOOK3S_64
	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 ARCH_HAS_DMA_MAP_DIRECT 		if PPC64 && PPC_PSERIES
	select DYNAMIC_FTRACE			if FUNCTION_TRACER
	select EDAC_ATOMIC_SCRUB
	select EDAC_SUPPORT
	select GENERIC_ATOMIC64			if PPC32
	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 GENERIC_GETTIMEOFDAY
	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_DEBUG_KMEMLEAK
	select HAVE_DEBUG_STACKOVERFLOW