config ARM64 def_bool y select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_COMPAT_IPC_PARSE_VERSION select ARM_HAS_SG_CHAIN select ARCH_WANT_FRAME_POINTERS select ARM_AMBA select ARM_ARCH_TIMER select AUDIT_ARCH_COMPAT_GENERIC select CLONE_BACKWARDS select COMMON_CLK select ARM_GIC select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_CPU_AUTOPROBE select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_KGDB select HAVE_ARCH_TRACEHOOK select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_ATTRS select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER select HAVE_GENERIC_DMA_COHERENT select HAVE_GENERIC_HARDIRQS select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_MEMBLOCK select HAVE_PERF_EVENTS select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM select OF select OF_EARLY_FLATTREE select OF_RESERVED_MEM select PERF_USE_VMALLOC select POWER_RESET select POWER_SUPPLY select RTC_LIB select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE help ARM 64-bit (AArch64) Linux support. config ARM_HAS_SG_CHAIN def_bool y config 64BIT def_bool y config ARCH_PHYS_ADDR_T_64BIT def_bool y config MMU def_bool y config NO_IOPORT def_bool y 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 ARCH_HAS_CPUFREQ bool help Internal node to signify that the ARCH has CPUFREQ support and that the relevant menu configurations are displayed for it. config GENERIC_HWEIGHT def_bool y config GENERIC_CSUM def_bool y config GENERIC_CALIBRATE_DELAY def_bool y config ZONE_DMA def_bool y config ARCH_DMA_ADDR_T_64BIT def_bool y config NEED_DMA_MAP_STATE def_bool y config NEED_SG_DMA_LENGTH def_bool y config SWIOTLB def_bool y config IOMMU_HELPER def_bool SWIOTLB config ARM_ERRATA_824069 bool "ARM errata: Cache line might not be marked as clean after a CleanShared snoop" depends on SMP help This option enables the workaround for erratum 824069 affecting Cortex-A53 MPCore with two or more processors (r0p0..r0p2). If a Cortex-A53 processor is executing a store or PLDW instruction at the same time as a processor in another cluster is executing a cache maintenance operation to the same address, then this erratum might cause a clean cache line to be incorrectly marked as dirty. This workaround replaces all cache clean opeartion to clean & invalidate. 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_MT6735 bool "MediaTek MT6735" select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_CPUFREQ select ARM_AMBA select CPU_V7 select HAVE_SMP select NEED_MACH_MEMORY_H select IRQ_DOMAIN select IRQ_DOMAIN_DEBUG select GENERIC_SCHED_CLOCK select MTK_SYSTRACKER select ARMV7_COMPAT select ARMV7_COMPAT_CPUINFO help This enable support for MediaTek MT6735 config ARCH_MT6735M bool "MediaTek MT6735M" select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_CPUFREQ select ARM_AMBA select CPU_V7 select HAVE_SMP select NEED_MACH_MEMORY_H select IRQ_DOMAIN select IRQ_DOMAIN_DEBUG select GENERIC_SCHED_CLOCK select MTK_SYSTRACKER select ARMV7_COMPAT select ARMV7_COMPAT_CPUINFO help This enable support for MediaTek MT6735M config ARCH_MT6753 bool "MediaTek MT6735M" select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_CPUFREQ select ARM_AMBA select CPU_V7 select HAVE_SMP select NEED_MACH_MEMORY_H select IRQ_DOMAIN select IRQ_DOMAIN_DEBUG select GENERIC_SCHED_CLOCK select MTK_SYSTRACKER select ARMV7_COMPAT select ARMV7_COMPAT_CPUINFO help This enable support for MediaTek MT6753 config ARCH_MT6752 bool "MediaTek MT6752" select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_CPUFREQ select ARM_AMBA select CPU_V7 select HAVE_SMP select NEED_MACH_MEMORY_H select IRQ_DOMAIN select IRQ_DOMAIN_DEBUG select GENERIC_SCHED_CLOCK select MTK_SYSTRACKER select MTK_L2C_SHARE select ARCH_REQUIRE_GPIOLIB select MTK_ETM select MTK_EIC select ARMV7_COMPAT select ARMV7_COMPAT_CPUINFO help This enable support for MediaTek MT6752 config ARCH_MT6795 bool "MediaTek MT6795" select GENERIC_TIME select GENERIC_CLOCKEVENTS select ARCH_HAS_CPUFREQ select ARM_AMBA select CPU_V7 select HAVE_SMP select NEED_MACH_MEMORY_H select FIQ_GLUE select IRQ_DOMAIN select IRQ_DOMAIN_DEBUG select GENERIC_SCHED_CLOCK select ARCH_REQUIRE_GPIOLIB select MTK_CIRQ select MTK_CPU_STRESS select MTK_SYSTRACKER select MTK_LASTPC select ARMV7_COMPAT select ARMV7_COMPAT_CPUINFO help This enable support for MediaTek MT6795 endmenu source "drivers/misc/mediatek/mach/Kconfig" menu "Bus support" config ARM_AMBA bool 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 SMP bool "Symmetric Multi-Processing" select USE_GENERIC_SMP_HELPERS 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 ARM_CPU_TOPOLOGY bool "Support CPU topology definition" depends on SMP default y help Support CPU topology definition, based on configuration provided by the firmware. config SCHED_MC bool "Multi-core scheduler support" depends on ARM_CPU_TOPOLOGY help Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_SMT bool "SMT scheduler support" depends on ARM_CPU_TOPOLOGY help Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here. config DISABLE_CPU_SCHED_DOMAIN_BALANCE bool "(EXPERIMENTAL) Disable CPU level scheduler load-balancing" help Disables scheduler load-balancing at CPU sched domain level. config SCHED_HMP bool "(EXPERIMENTAL) Heterogenous multiprocessor scheduling" depends on DISABLE_CPU_SCHED_DOMAIN_BALANCE && SCHED_MC && FAIR_GROUP_SCHED && !SCHED_AUTOGROUP help Experimental scheduler optimizations for heterogeneous platforms. Attempts to introspectively select task affinity to optimize power and performance. Basic support for multiple (>2) cpu types is in place, but it has only been tested with two types of cpus. There is currently no support for migration of task groups, hence !SCHED_AUTOGROUP. Furthermore, normal load-balancing must be disabled between cpus of different type (DISABLE_CPU_SCHED_DOMAIN_BALANCE). config SCHED_HMP_PRIO_FILTER bool "(EXPERIMENTAL) Filter HMP migrations by task priority" depends on SCHED_HMP help Enables task priority based HMP migration filter. Any task with a NICE value above the threshold will always be on low-power cpus with less compute capacity. config SCHED_HMP_PRIO_FILTER_VAL int "NICE priority threshold" default 5 depends on SCHED_HMP_PRIO_FILTER config HMP_FAST_CPU_MASK string "HMP scheduler fast CPU mask" depends on SCHED_HMP help Leave empty to use device tree information. Specify the cpuids of the fast CPUs in the system as a list string, e.g. cpuid 0+1 should be specified as 0-1. config HMP_SLOW_CPU_MASK string "HMP scheduler slow CPU mask" depends on SCHED_HMP help Leave empty to use device tree information. Specify the cpuids of the slow CPUs in the system as a list string, e.g. cpuid 0+1 should be specified as 0-1. config HMP_VARIABLE_SCALE bool "Allows changing the load tracking scale through sysfs" depends on SCHED_HMP help When turned on, this option exports the thresholds and load average period value for the load tracking patches through sysfs. The values can be modified to change the rate of load accumulation and the thresholds used for HMP migration. The load_avg_period_ms is the time in ms to reach a load average of 0.5 for an idle task of 0 load average ratio that start a busy loop. The up_threshold and down_threshold is the value to go to a faster CPU or to go back to a slower cpu. The {up,down}_threshold are devided by 1024 before being compared to the load average. For examples, with load_avg_period_ms = 128 and up_threshold = 512, a running task with a load of 0 will be migrated to a bigger CPU after 128ms, because after 128ms its load_avg_ratio is 0.5 and the real up_threshold is 0.5. This patch has the same behavior as changing the Y of the load average computation to (1002/1024)^(LOAD_AVG_PERIOD/load_avg_period_ms) but it remove intermadiate overflows in computation. config MET_SCHED_HMP bool "(EXPERIMENTAL) MET SCHED HMP Info" depends on SCHED_HMP_ENHANCEMENT depends on HMP_TRACER help MET SCHED HMP Info config HMP_FREQUENCY_INVARIANT_SCALE bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP" depends on HMP_VARIABLE_SCALE && CPU_FREQ depends on !ARCH_SCALE_INVARIANT_CPU_CAPACITY help Scales the current load contribution in line with the frequency of the CPU that the task was executed on. In this version, we use a simple linear scale derived from the maximum frequency reported by CPUFreq. Restricting tracked load to be scaled by the CPU's frequency represents the consumption of possible compute capacity (rather than consumption of actual instantaneous capacity as normal) and allows the HMP migration's simple threshold migration strategy to interact more predictably with CPUFreq's asynchronous compute capacity changes. config SCHED_HMP_ENHANCEMENT bool "(EXPERIMENTAL) HMP Ennhancement" depends on SCHED_HMP help HMP Ennhancement config HMP_TRACER bool "(EXPERIMENTAL) Profile HMP scheduler" depends on SCHED_HMP_ENHANCEMENT help Profile HMP scheduler config HMP_DYNAMIC_THRESHOLD bool "(EXPERIMENTAL) Dynamically adjust task migration threshold" depends on SCHED_HMP_ENHANCEMENT help Dynamically adjust task migration threshold according to current system load config HMP_GLOBAL_BALANCE bool "(EXPERIMENTAL) Enhance HMP global load balance" depends on SCHED_HMP_ENHANCEMENT help Enhance HMP global load balance config HMP_TASK_ASSIGNMENT bool "(EXPERIMENTAL) Enhance HMP task assignment" depends on SCHED_HMP_ENHANCEMENT help Enhance HMP task assignment config HMP_DISCARD_CFS_SELECTION_RESULT bool "(EXPERIMENTAL) Discard CFS runqueue selection result" depends on SCHED_HMP_ENHANCEMENT && HMP_TASK_ASSIGNMENT help Discard CFS runqueue selection result even if only one cluster exists config HMP_PACK_SMALL_TASK bool "(EXPERIMENTAL) Packing Small Tasks" depends on SCHED_HMP_ENHANCEMENT help This option enables Packing Small Tasks config HMP_PACK_BUDDY_INFO bool "(EXPERIMENTAL) Packing Small Tasks Buddy Information Log" depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK help This option enables Packing Small Tasks Buddy Information Log config HMP_LAZY_BALANCE bool "(EXPERIMENTAL) Lazy Balance" depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK help This option enables Lazy Balance config HMP_POWER_AWARE_CONTROLLER bool "(EXPERIMENTAL) Power-aware Scheduler for b.L MP Controller" depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK && HMP_LAZY_BALANCE help Power-aware scheduler for b.L MP controller and status interface config HEVTASK_INTERFACE bool "task status interface" help The option provide an interface to show task status config ARCH_SCALE_INVARIANT_CPU_CAPACITY bool "(EXPERIMENTAL) Scale-Invariant CPU Compute Capacity Recording" depends on CPU_FREQ help Provides a new measure of maximum and instantaneous CPU compute capacity, derived from a table of relative compute performance for each core type present in the system. The table is an estimate and specific core performance may be different for any particular workload. The measure includes the relative performance and a linear scale of current to maximum frequency such that at maximum frequency (as expressed in the DTB) the reported compute capacity will be equal to the estimated performance from the table. Values range between 0 and 1023 where 1023 is the highest capacity available in the system. config NR_CPUS int "Maximum number of CPUs (2-32)" range 2 32 depends on SMP default "4" 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. config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" depends on SMP help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. source kernel/Kconfig.preempt 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" config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" ---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 prctl(PR_SET_SECCOMP), it cannot be disabled and the task is only allowed to execute a few safe syscalls defined by each seccomp mode. 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 "CPU Power Management" if ARCH_HAS_CPUFREQ source "drivers/cpufreq/Kconfig" endif 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 depends on !ARCH_S5PC100 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \ CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK || ARM64 def_bool y config ARM64_CPU_SUSPEND def_bool PM_SLEEP config ARCH_HIBERNATION_POSSIBLE bool depends on MMU default y if ARCH_SUSPEND_POSSIBLE endmenu source "net/Kconfig" source "drivers/Kconfig" source "fs/Kconfig" source "arch/arm64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" if CRYPTO source "arch/arm64/crypto/Kconfig" endif source "lib/Kconfig"