v4.19.13 snapshot.
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
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+++ b/arch/powerpc/Kconfig
@@ -0,0 +1,1205 @@
+# SPDX-License-Identifier: GPL-2.0
+source "arch/powerpc/platforms/Kconfig.cputype"
+
+config PPC32
+ bool
+ default y if !PPC64
+
+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 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 RWSEM_GENERIC_SPINLOCK
+ bool
+
+config RWSEM_XCHGADD_ALGORITHM
+ bool
+ default y
+
+config GENERIC_LOCKBREAK
+ bool
+ default y
+ depends on SMP && PREEMPT
+
+config GENERIC_HWEIGHT
+ bool
+ default y
+
+config ARCH_HAS_DMA_SET_COHERENT_MASK
+ bool
+
+config PPC
+ bool
+ default y
+ #
+ # Please keep this list sorted alphabetically.
+ #
+ select ARCH_HAS_DEVMEM_IS_ALLOWED
+ select ARCH_HAS_DMA_SET_COHERENT_MASK
+ select ARCH_HAS_ELF_RANDOMIZE
+ select ARCH_HAS_FORTIFY_SOURCE
+ select ARCH_HAS_GCOV_PROFILE_ALL
+ select ARCH_HAS_PHYS_TO_DMA
+ select ARCH_HAS_PMEM_API if PPC64
+ select ARCH_HAS_PTE_SPECIAL
+ select ARCH_HAS_MEMBARRIER_CALLBACKS
+ select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
+ select ARCH_HAS_SG_CHAIN
+ select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION)
+ select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64
+ select ARCH_HAS_UBSAN_SANITIZE_ALL
+ select ARCH_HAS_ZONE_DEVICE if PPC_BOOK3S_64
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG
+ 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_WANT_IPC_PARSE_VERSION
+ select ARCH_WEAK_RELEASE_ACQUIRE
+ select BINFMT_ELF
+ select BUILDTIME_EXTABLE_SORT
+ select CLONE_BACKWARDS
+ select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
+ 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_IRQ_SHOW
+ select GENERIC_IRQ_SHOW_LEVEL
+ 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_JUMP_LABEL
+ select HAVE_ARCH_KGDB
+ select HAVE_ARCH_MMAP_RND_BITS
+ select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
+ select HAVE_ARCH_SECCOMP_FILTER
+ select HAVE_ARCH_TRACEHOOK
+ select HAVE_CBPF_JIT if !PPC64
+ select HAVE_CONTEXT_TRACKING 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_FTRACE_MCOUNT_RECORD
+ 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_GENERIC_GUP
+ 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_XZ if PPC_BOOK3S
+ 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_MEMBLOCK
+ select HAVE_MEMBLOCK_NODE_MAP
+ 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 HAVE_RCU_TABLE_FREE if SMP
+ select HAVE_REGS_AND_STACK_ACCESS_API
+ select HAVE_RELIABLE_STACKTRACE if PPC64 && 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 NO_BOOTMEM
+ select OF
+ select OF_EARLY_FLATTREE
+ select OF_RESERVED_MEM
+ select OLD_SIGACTION if PPC32
+ select OLD_SIGSUSPEND
+ select RTC_LIB
+ select SPARSE_IRQ
+ select SYSCTL_EXCEPTION_TRACE
+ 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 GENERIC_CSUM
+ def_bool n
+
+config EARLY_PRINTK
+ bool
+ default y
+
+config PANIC_TIMEOUT
+ int
+ default 180
+
+config COMPAT
+ bool
+ default y if PPC64
+ select COMPAT_BINFMT_ELF
+ select ARCH_WANT_OLD_COMPAT_IPC
+ select COMPAT_OLD_SIGACTION
+
+config SYSVIPC_COMPAT
+ bool
+ depends on COMPAT && SYSVIPC
+ default y
+
+# All PPC32s use generic nvram driver through ppc_md
+config GENERIC_NVRAM
+ bool
+ default y if PPC32
+
+config SCHED_OMIT_FRAME_POINTER
+ bool
+ default y
+
+config ARCH_MAY_HAVE_PC_FDC
+ bool
+ default PCI
+
+config PPC_UDBG_16550
+ bool
+ default n
+
+config GENERIC_TBSYNC
+ bool
+ default y if PPC32 && SMP
+ default n
+
+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.
+ default n
+
+config DEFAULT_UIMAGE
+ bool
+ help
+ Used to allow a board to specify it wants a uImage built by default
+ default n
+
+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 PPC_DCR_NATIVE
+ bool
+ default n
+
+config PPC_DCR_MMIO
+ bool
+ default n
+
+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
+ default n
+
+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 ZONE_DMA32
+ bool
+ default y if PPC64
+
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
+ 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
+ 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
+ default n
+ ---help---
+ Support user-mode Transactional Memory on POWERPC.
+
+config LD_HEAD_STUB_CATCH
+ bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
+ depends on PPC64
+ default n
+ 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
+ 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 ARCH_CPU_PROBE_RELEASE
+ def_bool y
+ depends on HOTPLUG_CPU
+
+config ARCH_ENABLE_MEMORY_HOTPLUG
+ def_bool y
+
+config ARCH_HAS_WALK_MEMORY
+ 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
+ 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 RELOCATABLE_TEST
+ bool "Test relocatable kernel"
+ depends on (PPC64 && RELOCATABLE)
+ default n
+ 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 || 6xx || 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
+ 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 "N"
+
+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
+
+# Some NUMA nodes have memory ranges that span
+# other nodes. Even though a pfn is valid and
+# between a node's start and end pfns, it may not
+# reside on that node. See memmap_init_zone()
+# for details.
+config NODES_SPAN_OTHER_NODES
+ def_bool y
+ depends on NEED_MULTIPLE_NODES
+
+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 !PPC_FSL_BOOK3E && (44x || PPC_BOOK3S_64 || PPC_BOOK3E_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 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 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"
+ depends on PPC_BOOK3S_64 && PPC_64K_PAGES
+ help
+ This option adds support for a system call to allow user programs
+ to set access permissions (read/write, readonly, or no access)
+ on the 4k subpages of each 64k page.
+
+config PPC_COPRO_BASE
+ bool
+ default n
+
+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_BOOL
+ bool "Default bootloader kernel arguments"
+
+config CMDLINE
+ string "Initial kernel command string"
+ depends on CMDLINE_BOOL
+ default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
+ 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.
+
+config CMDLINE_FORCE
+ bool "Always use the default kernel command string"
+ depends on CMDLINE_BOOL
+ 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.
+
+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 SECCOMP
+ bool "Enable seccomp to safely compute untrusted bytecode"
+ depends on PROC_FS
+ default y
+ help
+ This kernel feature is useful for number crunching applications
+ that may need to compute untrusted bytecode during their
+ execution. By using pipes or other transports made available to
+ the process as file descriptors supporting the read/write
+ syscalls, it's possible to isolate those applications in
+ their own address space using seccomp. Once seccomp is
+ enabled via /proc/<pid>/seccomp, it cannot be disabled
+ and the task is only allowed to execute a few safe syscalls
+ defined by each seccomp mode.
+
+ If unsure, say Y. Only embedded should say N here.
+
+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/vm/protection-keys.rst
+
+ If unsure, say y.
+
+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 ZONE_DMA
+ bool
+ default y
+
+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
+ default n
+
+config EISA
+ bool
+
+config SBUS
+ bool
+
+config FSL_SOC
+ bool
+
+config FSL_PCI
+ bool
+ 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
+
+# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
+config MCA
+ bool
+
+# Platforms that what PCI turned unconditionally just do select PCI
+# in their config node. Platforms that want to choose at config
+# time should select PPC_PCI_CHOICE
+config PPC_PCI_CHOICE
+ bool
+
+config PCI
+ bool "PCI support" if PPC_PCI_CHOICE
+ default y if !40x && !CPM2 && !PPC_8xx && !PPC_83xx \
+ && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
+ default PCI_QSPAN if PPC_8xx
+ select GENERIC_PCI_IOMAP
+ help
+ Find out whether your system includes a PCI bus. PCI is the name of
+ a bus system, i.e. the way the CPU talks to the other stuff inside
+ your box. If you say Y here, the kernel will include drivers and
+ infrastructure code to support PCI bus devices.
+
+config PCI_DOMAINS
+ def_bool PCI
+
+config PCI_SYSCALL
+ def_bool PCI
+
+config PCI_QSPAN
+ bool "QSpan PCI"
+ depends on PPC_8xx
+ select PPC_I8259
+ help
+ Say Y here if you have a system based on a Motorola 8xx-series
+ embedded processor with a QSPAN PCI interface, otherwise say N.
+
+config PCI_8260
+ bool
+ depends on PCI && 8260
+ select PPC_INDIRECT_PCI
+ default y
+
+source "drivers/pci/Kconfig"
+
+source "drivers/pcmcia/Kconfig"
+
+config HAS_RAPIDIO
+ bool
+ default n
+
+config RAPIDIO
+ tristate "RapidIO support"
+ depends on HAS_RAPIDIO || PCI
+ help
+ If you say Y here, the kernel will include drivers and
+ infrastructure code to support RapidIO interconnect devices.
+
+config FSL_RIO
+ bool "Freescale Embedded SRIO Controller support"
+ depends on RAPIDIO = y && HAS_RAPIDIO
+ default "n"
+ ---help---
+ Include support for RapidIO controller on Freescale embedded
+ processors (MPC8548, MPC8641, etc).
+
+source "drivers/rapidio/Kconfig"
+
+endmenu
+
+config NONSTATIC_KERNEL
+ bool
+ default n
+
+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_STD_MMU && 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 "0xc0000000"
+
+config CONSISTENT_SIZE_BOOL
+ bool "Set custom consistent memory pool size"
+ depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
+ help
+ This option allows you to set the size of the
+ consistent memory pool. This pool of virtual memory
+ is used to make consistent memory allocations.
+
+config CONSISTENT_SIZE
+ hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
+ default "0x00200000" if NOT_COHERENT_CACHE
+
+config PIN_TLB
+ bool "Pinned Kernel TLBs (860 ONLY)"
+ depends on ADVANCED_OPTIONS && PPC_8xx && \
+ !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
+
+config PIN_TLB_DATA
+ bool "Pinned TLB for DATA"
+ depends on PIN_TLB
+ default y
+
+config PIN_TLB_IMMR
+ bool "Pinned TLB for IMMR"
+ depends on PIN_TLB
+ default y
+
+config PIN_TLB_TEXT
+ bool "Pinned TLB for TEXT"
+ depends on PIN_TLB
+ default y
+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"