config ARM64 def_bool y select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_USE_CMPXCHG_LOCKREF select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_COMPAT_IPC_PARSE_VERSION select ARCH_WANT_FRAME_POINTERS select ARM_AMBA select ARM_ARCH_TIMER select ARM_GIC select CLONE_BACKWARDS # select COMMON_CLK select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND select GENERIC_PCI_IOMAP select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_ATTRS select HAVE_DMA_CONTIGUOUS if MMU select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_GENERIC_DMA_COHERENT select HAVE_GENERIC_HARDIRQS select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_MEMBLOCK select HAVE_PATA_PLATFORM select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM select OF select OF_EARLY_FLATTREE select PERF_USE_VMALLOC select POWER_RESET select POWER_SUPPLY select RTC_LIB select SPARSE_IRQ if !ARCH_TEGRA select SYSCTL_EXCEPTION_TRACE help ARM 64-bit (AArch64) Linux support. config NEED_MACH_MEMORY_H bool help Select this when mach/memory.h is required to provide special definitions for this platform. The need for mach/memory.h should be avoided when possible. config 64BIT def_bool y config ARCH_PHYS_ADDR_T_64BIT def_bool y config MMU def_bool y config NO_IOPORT bool config STACKTRACE_SUPPORT def_bool y config LOCKDEP_SUPPORT def_bool y config TRACE_IRQFLAGS_SUPPORT def_bool y config GENERIC_LOCKBREAK def_bool y depends on SMP && PREEMPT config RWSEM_GENERIC_SPINLOCK def_bool y config ARM64_SIMPLE_SPINLOCK def_bool n help The simple locks are designed to be simpler, faster, and more power efficent than the normal locks when there are not many cores contending for the lock. It does this by minimizing the time before executing wfe in the contention case while minimizing the work in the uncontended case. config GENERIC_HWEIGHT def_bool y config GENERIC_CSUM def_bool y config GENERIC_CALIBRATE_DELAY def_bool y config ZONE_DMA32 def_bool y config ARCH_DMA_ADDR_T_64BIT def_bool y config NEED_DMA_MAP_STATE def_bool y config ARM_HAS_SG_CHAIN def_bool y config NEED_SG_DMA_LENGTH def_bool y config SWIOTLB def_bool y if !ARM_DMA_USE_IOMMU config IOMMU_HELPER def_bool SWIOTLB config ARM_DMA_USE_IOMMU select NEED_SG_DMA_LENGTH select ARM_HAS_SG_CHAIN bool config MULTI_IRQ_HANDLER bool help Allow each machine to specify it's own IRQ handler at run time. config KERNEL_MODE_NEON def_bool y source "init/Kconfig" source "kernel/Kconfig.freezer" menu "Platform selection" config ARCH_VEXPRESS bool "ARMv8 software model (Versatile Express)" select ARCH_REQUIRE_GPIOLIB select COMMON_CLK_VERSATILE select POWER_RESET_VEXPRESS select VEXPRESS_CONFIG help This enables support for the ARMv8 software model (Versatile Express). config ARCH_TEGRA bool "NVIDIA Tegra" select CLKDEV_LOOKUP select CLKSRC_MMIO select GENERIC_CLOCKEVENTS select GENERIC_GPIO select HAVE_CLK select HAVE_SMP select NEED_MACH_MEMORY_H select PCI help This enables support for NVIDIA Tegra based systems (Tegra APX, Tegra 6xx and Tegra 2 series). source "arch/arm64/mach-tegra/Kconfig" endmenu menu "Bus support" config ARM_AMBA bool config PCI bool "PCI support" if MIGHT_HAVE_PCI help Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or VESA. If you have PCI, say Y, otherwise N. source "drivers/pci/Kconfig" source "drivers/pci/pcie/Kconfig" endmenu menu "Kernel Features" config ARM64_64K_PAGES bool "Enable 64KB pages support" help This feature enables 64KB pages support (4KB by default) allowing only two levels of page tables and faster TLB look-up. AArch32 emulation is not available when this feature is enabled. config CPU_BIG_ENDIAN bool "Build big-endian kernel" help Say Y if you plan on running a kernel in big-endian mode. config SMP bool "Symmetric Multi-Processing" help This enables support for systems with more than one CPU. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, single processor machines. On a single processor machine, the kernel will run faster if you say N here. If you don't know what to do here, say N. config NR_CPUS int "Maximum number of CPUs (2-32)" range 2 32 depends on SMP # These have to remain sorted largest to smallest default "8" config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" depends on SMP && HOTPLUG help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. If you don't know what to do here, say N. config HOTPLUG_CPU0 bool "Support for CPU0 hotplug" depends on HOTPLUG_CPU default n help CPU0 hotplug is not supported on all arm64 platforms. Select Y to enable CPU0 hotplug. If you're unsure, leave CPU0 hotplug disabled. config SWP_EMULATE bool "Emulate SWP/SWPB instructions" help ARMv6 architecture deprecates use of the SWP/SWPB instructions. ARMv8 oblosetes the use of SWP/SWPB instructions. ARMv7 multiprocessing extensions introduce the ability to disable these instructions, triggering an undefined instruction exception when executed. Say Y here to enable software emulation of these instructions for userspace (not kernel) using LDREX/STREX. Also creates /proc/cpu/swp_emulation for statistics. In some older versions of glibc [<=2.8] SWP is used during futex trylock() operations with the assumption that the code will not be preempted. This invalid assumption may be more likely to fail with SWP emulation enabled, leading to deadlock of the user application. NOTE: when accessing uncached shared regions, LDREX/STREX rely on an external transaction monitoring block called a global monitor to maintain update atomicity. If your system does not implement a global monitor, this option can cause programs that perform SWP operations to uncached memory to deadlock. If unsure, say Y. source kernel/Kconfig.preempt config ARCH_NR_GPIO int default 1024 if ARCH_TEGRA default 0 help Maximum number of GPIOs in the system. If unsure, leave the default value. config HZ int default 100 config ARCH_HAS_HOLES_MEMORYMODEL def_bool y if SPARSEMEM config ARCH_SPARSEMEM_ENABLE def_bool y select SPARSEMEM_VMEMMAP_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool ARCH_SPARSEMEM_ENABLE config ARCH_SELECT_MEMORY_MODEL def_bool ARCH_SPARSEMEM_ENABLE config HAVE_ARCH_PFN_VALID def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM config HW_PERF_EVENTS bool "Enable hardware performance counter support for perf events" depends on PERF_EVENTS default y help Enable hardware performance counter support for perf events. If disabled, perf events will use software events only. config ARMV7_COMPAT bool "Kernel support for ARMv7 applications" depends on COMPAT select SWP_EMULATE help This option enables features that allow that ran on an ARMv7 or older processor to continue functioning. If you want to execute ARMv7 applications, say Y config ARMV7_COMPAT_CPUINFO bool "Report backwards compatible cpu features in /proc/cpuinfo" depends on ARMV7_COMPAT default y help This option makes /proc/cpuinfo list CPU features that an ARMv7 or earlier kernel would report, but are not optional on an ARMv8 or later processor. If you want to execute ARMv7 applications, say Y source "mm/Kconfig" endmenu menu "Boot options" config CMDLINE string "Default kernel command string" default "" help Provide a set of default command-line options at build time by entering them here. As a minimum, you should specify the the root device (e.g. root=/dev/nfs). 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 BUILD_ARM64_APPENDED_DTB_IMAGE bool "Build a concatenated Image.gz/dtb by default" depends on OF help Enabling this option will cause a concatenated Image.gz and list of DTBs to be built by default (instead of a standalone Image.gz.) The image will built in arch/arm64/boot/Image.gz-dtb config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES string "Default dtb names" depends on BUILD_ARM64_APPENDED_DTB_IMAGE help Space separated list of names of dtbs to append when building a concatenated Image.gz-dtb. endmenu menu "Userspace binary formats" source "fs/Kconfig.binfmt" config COMPAT bool "Kernel support for 32-bit EL0" depends on !ARM64_64K_PAGES select COMPAT_BINFMT_ELF select HAVE_UID16 select OLD_SIGSUSPEND3 select COMPAT_OLD_SIGACTION help This option enables support for a 32-bit EL0 running under a 64-bit kernel at EL1. AArch32-specific components such as system calls, the user helper functions, VFP support and the ptrace interface are handled appropriately by the kernel. If you want to execute 32-bit userspace applications, say Y. config SYSVIPC_COMPAT def_bool y depends on COMPAT && SYSVIPC endmenu menu "Power management options" source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE def_bool y config ARM_CPU_SUSPEND def_bool y endmenu menu "CPU Power Management" source "drivers/cpufreq/Kconfig" source "drivers/cpuidle/Kconfig" source "drivers/cpuquiet/Kconfig" endmenu source "net/Kconfig" source "drivers/Kconfig" source "fs/Kconfig" source "arch/arm64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"