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diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
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+# SPDX-License-Identifier: GPL-2.0
+source "arch/powerpc/platforms/Kconfig.cputype"
+
+config CC_HAS_ELFV2
+ def_bool PPC64 && $(cc-option, -mabi=elfv2)
+
+config CC_HAS_PREFIXED
+ def_bool PPC64 && $(cc-option, -mcpu=power10 -mprefixed)
+
+config CC_HAS_PCREL
+ # Clang has a bug (https://github.com/llvm/llvm-project/issues/62372)
+ # where pcrel code is not generated if -msoft-float, -mno-altivec, or
+ # -mno-vsx options are also given. Without these options, fp/vec
+ # instructions are generated from regular kernel code. So Clang can't
+ # do pcrel yet.
+ def_bool PPC64 && CC_IS_GCC && $(cc-option, -mcpu=power10 -mpcrel)
+
+config 32BIT
+ bool
+ default y if PPC32
+
+config 64BIT
+ bool
+ default y if PPC64
+
+config LIVEPATCH_64
+ def_bool PPC64
+ depends on LIVEPATCH
+
+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 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_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 LOCKDEP_SUPPORT
+ bool
+ default y
+
+config GENERIC_LOCKBREAK
+ bool
+ default y
+ depends on SMP && PREEMPTION && !PPC_QUEUED_SPINLOCKS
+
+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_DISABLE_KASAN_INLINE if PPC_RADIX_MMU
+ select ARCH_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE
+ select ARCH_ENABLE_MEMORY_HOTPLUG
+ select ARCH_ENABLE_MEMORY_HOTREMOVE
+ select ARCH_HAS_COPY_MC if PPC64
+ select ARCH_HAS_CURRENT_STACK_POINTER
+ select ARCH_HAS_DEBUG_VIRTUAL
+ select ARCH_HAS_DEBUG_VM_PGTABLE
+ select ARCH_HAS_DEBUG_WX if STRICT_KERNEL_RWX
+ select ARCH_HAS_DEVMEM_IS_ALLOWED
+ select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES
+ select ARCH_HAS_FORTIFY_SOURCE
+ select ARCH_HAS_GCOV_PROFILE_ALL
+ select ARCH_HAS_HUGEPD if HUGETLB_PAGE
+ select ARCH_HAS_KCOV
+ select ARCH_HAS_MEMBARRIER_CALLBACKS
+ select ARCH_HAS_MEMBARRIER_SYNC_CORE
+ select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU
+ select ARCH_HAS_MMIOWB if PPC64
+ select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
+ select ARCH_HAS_PHYS_TO_DMA
+ select ARCH_HAS_PMEM_API
+ select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64
+ select ARCH_HAS_PTE_SPECIAL
+ select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
+ select ARCH_HAS_SET_MEMORY
+ select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
+ select ARCH_HAS_STRICT_KERNEL_RWX if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
+ select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX
+ select ARCH_HAS_SYSCALL_WRAPPER if !SPU_BASE && !COMPAT
+ select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_HAS_UACCESS_FLUSHCACHE
+ select ARCH_HAS_UBSAN_SANITIZE_ALL
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG
+ select ARCH_KEEP_MEMBLOCK
+ select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if PPC_RADIX_MMU
+ 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_OPTIONAL_KERNEL_RWX_DEFAULT
+ select ARCH_SPLIT_ARG64 if PPC32
+ select ARCH_STACKWALK
+ select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x
+ select ARCH_USE_BUILTIN_BSWAP
+ select ARCH_USE_CMPXCHG_LOCKREF if PPC64
+ select ARCH_USE_MEMTEST
+ select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS
+ select ARCH_WANT_DEFAULT_BPF_JIT
+ select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+ select ARCH_WANT_IPC_PARSE_VERSION
+ select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
+ select ARCH_WANT_LD_ORPHAN_WARN
+ select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP if PPC_RADIX_MMU
+ select ARCH_WANTS_MODULES_DATA_IN_VMALLOC if PPC_BOOK3S_32 || PPC_8xx
+ select ARCH_WEAK_RELEASE_ACQUIRE
+ select BINFMT_ELF
+ select BUILDTIME_TABLE_SORT
+ select CLONE_BACKWARDS
+ select CPUMASK_OFFSTACK if NR_CPUS >= 8192
+ select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
+ select DMA_OPS_BYPASS if PPC64
+ select DMA_OPS if PPC64
+ select DYNAMIC_FTRACE if FUNCTION_TRACER
+ select EDAC_ATOMIC_SCRUB
+ select EDAC_SUPPORT
+ select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if ARCH_USING_PATCHABLE_FUNCTION_ENTRY
+ 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_GETTIMEOFDAY
+ select GENERIC_IDLE_POLL_SETUP
+ select GENERIC_IOREMAP
+ select GENERIC_IRQ_SHOW
+ select GENERIC_IRQ_SHOW_LEVEL
+ select GENERIC_PCI_IOMAP if PCI
+ select GENERIC_PTDUMP
+ select GENERIC_SMP_IDLE_THREAD
+ select GENERIC_TIME_VSYSCALL
+ select GENERIC_VDSO_TIME_NS
+ select HAS_IOPORT if PCI
+ select HAVE_ARCH_AUDITSYSCALL
+ select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
+ select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx
+ select HAVE_ARCH_JUMP_LABEL
+ select HAVE_ARCH_JUMP_LABEL_RELATIVE
+ select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14
+ select HAVE_ARCH_KASAN if PPC_RADIX_MMU
+ select HAVE_ARCH_KASAN if PPC_BOOK3E_64
+ select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN
+ select HAVE_ARCH_KCSAN
+ select HAVE_ARCH_KFENCE if ARCH_SUPPORTS_DEBUG_PAGEALLOC
+ select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
+ select HAVE_ARCH_WITHIN_STACK_FRAMES
+ 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_CONTEXT_TRACKING_USER
+ select HAVE_C_RECORDMCOUNT
+ select HAVE_DEBUG_KMEMLEAK
+ select HAVE_DEBUG_STACKOVERFLOW
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_DYNAMIC_FTRACE_WITH_ARGS if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
+ select HAVE_DYNAMIC_FTRACE_WITH_REGS if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
+ select HAVE_EBPF_JIT
+ select HAVE_EFFICIENT_UNALIGNED_ACCESS
+ select HAVE_FAST_GUP
+ select HAVE_FTRACE_MCOUNT_RECORD
+ select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1
+ select HAVE_FUNCTION_ERROR_INJECTION
+ select HAVE_FUNCTION_GRAPH_TRACER
+ select HAVE_FUNCTION_TRACER if PPC64 || (PPC32 && CC_IS_GCC)
+ select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC
+ select HAVE_GENERIC_VDSO
+ select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP
+ select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
+ select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
+ select HAVE_IOREMAP_PROT
+ select HAVE_IRQ_TIME_ACCOUNTING
+ 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 if HAVE_OBJTOOL_MCOUNT && (!ARCH_USING_PATCHABLE_FUNCTION_ENTRY || (!CC_IS_GCC || GCC_VERSION >= 110100))
+ 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_OPTPROBES
+ select HAVE_OBJTOOL if ARCH_USING_PATCHABLE_FUNCTION_ENTRY || MPROFILE_KERNEL || PPC32
+ select HAVE_OBJTOOL_MCOUNT if HAVE_OBJTOOL
+ select HAVE_PERF_EVENTS
+ select HAVE_PERF_EVENTS_NMI if PPC64
+ select HAVE_PERF_REGS
+ select HAVE_PERF_USER_STACK_DUMP
+ select HAVE_REGS_AND_STACK_ACCESS_API
+ select HAVE_RELIABLE_STACKTRACE
+ select HAVE_RSEQ
+ select HAVE_SETUP_PER_CPU_AREA if PPC64
+ select HAVE_SOFTIRQ_ON_OWN_STACK
+ select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
+ select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
+ select HAVE_STATIC_CALL if PPC32
+ select HAVE_SYSCALL_TRACEPOINTS
+ select HAVE_VIRT_CPU_ACCOUNTING
+ select HAVE_VIRT_CPU_ACCOUNTING_GEN
+ select HOTPLUG_SMT if HOTPLUG_CPU
+ select SMT_NUM_THREADS_DYNAMIC
+ select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE
+ select IOMMU_HELPER if PPC64
+ select IRQ_DOMAIN
+ select IRQ_FORCED_THREADING
+ select KASAN_VMALLOC if KASAN && MODULES
+ select LOCK_MM_AND_FIND_VMA
+ select MMU_GATHER_PAGE_SIZE
+ select MMU_GATHER_RCU_TABLE_FREE
+ select MMU_GATHER_MERGE_VMAS
+ select MMU_LAZY_TLB_SHOOTDOWN if PPC_BOOK3S_64
+ select MODULES_USE_ELF_RELA
+ select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE
+ select NEED_PER_CPU_EMBED_FIRST_CHUNK if PPC64
+ select NEED_PER_CPU_PAGE_FIRST_CHUNK if PPC64
+ select NEED_SG_DMA_LENGTH
+ select OF
+ 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 STRICT_KERNEL_RWX if STRICT_MODULE_RWX
+ select SYSCTL_EXCEPTION_TRACE
+ select THREAD_INFO_IN_TASK
+ select TRACE_IRQFLAGS_SUPPORT
+ #
+ # Please keep this list sorted alphabetically.
+ #
+
+config PPC_BARRIER_NOSPEC
+ bool
+ default y
+ depends on PPC_BOOK3S_64 || PPC_E500
+
+config PPC_HAS_LBARX_LHARX
+ bool
+
+config EARLY_PRINTK
+ bool
+ default y
+
+config PANIC_TIMEOUT
+ int
+ default 180
+
+config COMPAT
+ bool "Enable support for 32bit binaries"
+ depends on PPC64
+ depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
+ default y if !CPU_LITTLE_ENDIAN
+ select ARCH_WANT_OLD_COMPAT_IPC
+ select COMPAT_OLD_SIGACTION
+
+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 GENERIC_BUG_RELATIVE_POINTERS
+ def_bool y
+ depends on GENERIC_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 ARCH_HAS_ADD_PAGES
+ def_bool y
+ depends on ARCH_ENABLE_MEMORY_HOTPLUG
+
+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_PCI_OF_BUS_MAP
+ bool "Use pci_to_OF_bus_map (deprecated)"
+ depends on PPC32
+ depends on PPC_PMAC || PPC_CHRP
+ help
+ This option uses pci_to_OF_bus_map to map OF nodes to PCI devices, which
+ restricts the system to only having 256 PCI buses. On CHRP it also causes
+ the "pci-OF-bus-map" property to be created in the device tree.
+
+ If unsure, say "N".
+
+config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
+ depends on PPC32
+ depends on !PPC_PCI_OF_BUS_MAP
+ bool "Assign PCI bus numbers from zero individually for each PCI domain"
+ default y
+ help
+ By default on PPC32 were PCI bus numbers unique across all PCI domains.
+ So system could have only 256 PCI buses independently of available
+ PCI domains. When this option is enabled then PCI bus numbers are
+ PCI domain dependent and each PCI controller on own domain can have
+ 256 PCI buses, like it is on other Linux architectures.
+
+config PPC_OF_PLATFORM_PCI
+ bool
+ depends on PCI
+ depends on PPC64 # not supported on 32 bits yet
+
+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 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
+ select KMAP_LOCAL
+
+source "kernel/Kconfig.hz"
+
+config MATH_EMULATION
+ bool "Math emulation"
+ depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
+ select PPC_FPU_REGS
+ 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_ELF_ABI_V2 && FUNCTION_TRACER
+ def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN
+ def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN
+
+config ARCH_USING_PATCHABLE_FUNCTION_ENTRY
+ depends on FUNCTION_TRACER && (PPC32 || PPC64_ELF_ABI_V2)
+ depends on $(cc-option,-fpatchable-function-entry=2)
+ def_bool y if PPC32
+ def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mlittle-endian) if PPC64 && CPU_LITTLE_ENDIAN
+ def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh $(CC) -mbig-endian) if PPC64 && CPU_BIG_ENDIAN
+
+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 INTERRUPT_SANITIZE_REGISTERS
+ bool "Clear gprs on interrupt arrival"
+ depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER
+ default PPC_BOOK3E_64 || PPC_PSERIES || PPC_POWERNV
+ help
+ Reduce the influence of user register state on interrupt handlers and
+ syscalls through clearing user state from registers before handling
+ the exception.
+
+config PPC_QUEUED_SPINLOCKS
+ bool "Queued spinlocks" if EXPERT
+ depends on SMP
+ default PPC_BOOK3S_64
+ 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.
+
+config ARCH_CPU_PROBE_RELEASE
+ def_bool y
+ depends on HOTPLUG_CPU
+
+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 ARCH_SUPPORTS_KEXEC
+ def_bool PPC_BOOK3S || PPC_E500 || (44x && !SMP)
+
+config ARCH_SUPPORTS_KEXEC_FILE
+ def_bool PPC64
+
+config ARCH_SUPPORTS_KEXEC_PURGATORY
+ def_bool y
+
+config ARCH_SELECTS_KEXEC_FILE
+ def_bool y
+ depends on KEXEC_FILE
+ select KEXEC_ELF
+ select HAVE_IMA_KEXEC if IMA
+
+config PPC64_BIG_ENDIAN_ELF_ABI_V2
+ # Option is available to BFD, but LLD does not support ELFv1 so this is
+ # always true there.
+ prompt "Build big-endian kernel using ELF ABI V2" if LD_IS_BFD && EXPERT
+ def_bool y
+ depends on PPC64 && CPU_BIG_ENDIAN
+ depends on CC_HAS_ELFV2
+ help
+ This builds the kernel image using the "Power Architecture 64-Bit ELF
+ V2 ABI Specification", which has a reduced stack overhead and faster
+ function calls. This internal kernel ABI option does not affect
+ userspace compatibility.
+
+ The V2 ABI is standard for 64-bit little-endian, but for big-endian
+ it is less well tested by kernel and toolchain. However some distros
+ build userspace this way, and it can produce a functioning kernel.
+
+config RELOCATABLE
+ bool "Build a relocatable kernel"
+ depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
+ select NONSTATIC_KERNEL
+ 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 PPC_85xx && FLATMEM
+ 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 ARCH_SUPPORTS_CRASH_DUMP
+ def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
+
+config ARCH_SELECTS_CRASH_DUMP
+ def_bool y
+ depends on CRASH_DUMP
+ select RELOCATABLE if PPC64 || 44x || PPC_85xx
+
+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 Memory Allocation and Scheduler Support"
+ depends on PPC64 && SMP
+ default y if PPC_PSERIES || PPC_POWERNV
+ select USE_PERCPU_NUMA_NODE_ID
+ help
+ Enable NUMA (Non-Uniform Memory Access) support.
+
+ The kernel will try to allocate memory used by a CPU on the
+ local memory controller of the CPU and add some more
+ NUMA awareness to the kernel.
+
+config NODES_SHIFT
+ int
+ default "8" if PPC64
+ default "4"
+ 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 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
+
+choice
+ prompt "Page size"
+ default PPC_64K_PAGES if PPC_BOOK3S_64
+ 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 (Requires non-standard binutils settings)"
+ depends on 44x && !PPC_47x
+ help
+ Make the page size 256k.
+
+ The kernel will only be able to run applications that have been
+ compiled with '-zmax-page-size' set to 256K (the default is 64K) using
+ binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
+ definition from 0x10000 to 0x40000 in older versions.
+
+endchoice
+
+config PAGE_SIZE_4KB
+ def_bool y
+ depends on PPC_4K_PAGES
+
+config PAGE_SIZE_16KB
+ def_bool y
+ depends on PPC_16K_PAGES
+
+config PAGE_SIZE_64KB
+ def_bool y
+ depends on PPC_64K_PAGES
+
+config PAGE_SIZE_256KB
+ def_bool y
+ depends on PPC_256K_PAGES
+
+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 "15" if PPC_PSERIES || PPC_POWERNV
+ 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 || KFENCE
+ depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
+ PPC_85xx
+ 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 || KFENCE) && PPC_BOOK3S_32
+ range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
+ range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
+ default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
+ default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
+ default 23 if STRICT_KERNEL_RWX && PPC_8xx
+ default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
+ default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
+ default 24 if STRICT_KERNEL_RWX && PPC_85xx
+ 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 ARCH_FORCE_MAX_ORDER
+ int "Order of maximal physically contiguous allocations"
+ range 7 8 if PPC64 && PPC_64K_PAGES
+ default "8" if PPC64 && PPC_64K_PAGES
+ range 12 12 if PPC64 && !PPC_64K_PAGES
+ default "12" if PPC64 && !PPC_64K_PAGES
+ range 8 10 if PPC32 && PPC_16K_PAGES
+ default "8" if PPC32 && PPC_16K_PAGES
+ range 6 10 if PPC32 && PPC_64K_PAGES
+ default "6" if PPC32 && PPC_64K_PAGES
+ range 4 10 if PPC32 && PPC_256K_PAGES
+ default "4" if PPC32 && PPC_256K_PAGES
+ range 10 12
+ default "10"
+ help
+ The kernel page allocator limits the size of maximal physically
+ contiguous allocations. The limit is called MAX_ORDER and it
+ defines the maximal power of two of number of pages that can be
+ allocated as a single contiguous block. This option allows
+ overriding the default setting when ability to allocate very
+ large blocks of physically contiguous memory is required.
+
+ 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.
+
+ Don't change if unsure.
+
+config PPC_SUBPAGE_PROT
+ bool "Support setting protections for 4k subpages (subpage_prot syscall)"
+ default n
+ depends on PPC_64S_HASH_MMU && 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
+ depends on PPC_64S_HASH_MMU
+ 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
+ select PSERIES_PLPKS if PPC_PSERIES
+ 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.
+
+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 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 && PPC_85xx
+ 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 PPC_85xx
+ int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
+ default 3 if !STRICT_KERNEL_RWX
+ default 9 if DATA_SHIFT >= 24
+ default 12 if DATA_SHIFT >= 22
+ default 15
+
+config DYNAMIC_MEMSTART
+ bool "Enable page aligned dynamic load address for kernel"
+ depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 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 && PPC_85xx
+ 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 PPC_85xx
+ 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
+ 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 PPC_LIB_RHEAP
+ bool
+
+source "arch/powerpc/kvm/Kconfig"
+
+source "kernel/livepatch/Kconfig"