config ARM64 def_bool y select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_SG_CHAIN select ARCH_HAS_OPP select ARCH_USE_CMPXCHG_LOCKREF select ARCH_HAS_OPP select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_SUPPORTS_ATOMIC_RMW 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 ARM_GIC_V3 select BUILDTIME_EXTABLE_SORT select AUDIT_ARCH_COMPAT_GENERIC select CLONE_BACKWARDS select COMMON_CLK select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS select GENERIC_ALLOCATOR select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_CPU_AUTOPROBE select GENERIC_EARLY_IOREMAP select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KGDB select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_C_RECORDMCOUNT select HAVE_CC_STACKPROTECTOR select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_ATTRS select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE select HAVE_EFFICIENT_UNALIGNED_ACCESS 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_PATA_PLATFORM select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP 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 select CLOCKSOURCE_VALIDATE_LAST_CYCLE help ARM 64-bit (AArch64) Linux support. 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 RWSEM_XCHGADD_ALGORITHM def_bool y 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 ARM64_DMA_USE_IOMMU bool select ARM_HAS_SG_CHAIN select NEED_SG_DMA_LENGTH if ARM64_DMA_USE_IOMMU config ARM64_DMA_IOMMU_ALIGNMENT int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers" range 4 9 default 8 help DMA mapping framework by default aligns all buffers to the smallest PAGE_SIZE order which is greater than or equal to the requested buffer size. This works well for buffers up to a few hundreds kilobytes, but for larger buffers it just a waste of address space. Drivers which has relatively small addressing window (like 64Mib) might run out of virtual space with just a few allocations. With this parameter you can specify the maximum PAGE_SIZE order for DMA IOMMU buffers. Larger buffers will be aligned only to this specified order. The order is expressed as a power of two multiplied by the PAGE_SIZE. endif config SWIOTLB def_bool y config IOMMU_HELPER def_bool SWIOTLB config FIX_EARLYCON_MEM def_bool y config KERNEL_MODE_NEON def_bool y source "init/Kconfig" source "kernel/Kconfig.freezer" source "kernel/Kconfig.dump" 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_XGENE bool "AppliedMicro X-Gene SOC Family" help This enables support for AppliedMicro X-Gene SOC Family config ARCH_SUNXI bool "Allwinner SoC Family" select PINCTRL select SUNXI_TIMER help This enables support for Allwinner SUNXI SoC family if ARCH_SUNXI choice prompt "Select the architecture of SoC" default ARCH_SUN50I help Select the architecture for SoC sunxi `-- sun50i ----- Cortex-A53 based Family SoCs config ARCH_SUN50I bool "Allwinner SUN50I" endchoice # Select the wafer with sun50i if ARCH_SUN50I choice prompt "Select the wafer with arch sun50i" default ARCH_SUN50IW1 help Select the wafer with arch sun50i config ARCH_SUN50IW1 bool "Allwinner SUN50IW1 SoCs" help Support for Allwinner SUN50IW1 SoC family config ARCH_SUN50IW2 bool "Allwinner SUN50IW2 SoCs" help Support for Allwinner SUN50IW2 SoC family config ARCH_SUN50IW3 bool "Allwinner SUN50IW3 SoCs" help Support for Allwinner SUN50IW3 SoC family config ARCH_SUN50IW6 bool "Allwinner SUN50IW6 SoCs" help Support for Allwinner SUN50IW6 SoC family endchoice endif # Select the SoC with specific arch and wafer if ARCH_SUN50IW1 choice prompt "Select the SoC with wafer ARCH_SUN50IW1" default ARCH_SUN50IW1P1 help Select the SoC with wafer ARCH_SUN50IW1 config ARCH_SUN50IW1P1 bool "Allwinner SUN50IW1P1" select SUNXI_SMC endchoice endif if ARCH_SUN50IW2 choice prompt "Select the SoC with wafer ARCH_SUN50IW2" default ARCH_SUN50IW2P1 help Select the SoC with wafer ARCH_SUN50IW2 config ARCH_SUN50IW2P1 bool "Allwinner SUN50IW2P1" select HAVE_UNSTABLE_SCHED_CLOCK select SUNXI_SMC endchoice endif if ARCH_SUN50IW3 choice prompt "Select the SoC with wafer ARCH_SUN50IW3" default ARCH_SUN50IW3P1 help Select the SoC with wafer ARCH_SUN50IW3 config ARCH_SUN50IW3P1 bool "Allwinner SUN50IW3P1" select HAVE_UNSTABLE_SCHED_CLOCK select SUNXI_SMC endchoice endif if ARCH_SUN50IW6 choice prompt "Select the SoC with wafer ARCH_SUN50IW6" default ARCH_SUN50IW6P1 help Select the SoC with wafer ARCH_SUN50IW6 config ARCH_SUN50IW6P1 bool "Allwinner SUN50IW6P1" select HAVE_UNSTABLE_SCHED_CLOCK select SUNXI_SMC select ARCH_SUPPORTS_MSI endchoice endif # Select the board between FPGA and EVB choice prompt "Allwinner development boards" depends on ARCH_SUNXI default FPGA_V4_PLATFORM config FPGA_V4_PLATFORM bool "FPGAv4 board" help Support for Allwinner's FPGAv4 board config FPGA_V7_PLATFORM bool "FPGAv7 board" help Support for Allwinner's FPGAv7 board config EVB_PLATFORM bool "EVB board" help Support for Allwinner's EVB board endchoice config SUNXI_SOC_NAME string "The name of SUNXI SoC" default "" help Used for /sysfs/.../sysinfo. endif # end of ARCH_SUNXI endmenu menu "Bus support" config PCI bool "PCI support" help This feature enables support for PCI bus system. 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_DOMAINS_GENERIC def_bool PCI config PCI_SYSCALL def_bool PCI source "drivers/pci/Kconfig" source "drivers/pci/pcie/Kconfig" source "drivers/pci/hotplug/Kconfig" config ARM_AMBA bool endmenu menu "Kernel Features" menu "ARM errata workarounds" config ARM64_ERRATUM_845719 bool "Cortex-A53: 845719: a load might read incorrect data" depends on COMPAT default n help This option adds an alternative code sequence to work around ARM erratum 845719 on Cortex-A53 parts up to r0p4. When running a compat (AArch32) userspace on an affected Cortex-A53 part, a load at EL0 from a virtual address that matches the bottom 32 bits of the virtual address used by a recent load at (AArch64) EL1 might return incorrect data. The workaround is to write the contextidr_el1 register on exception return to a 32-bit task. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. endmenu 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" 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 SCHED_MC bool "Multi-core scheduler support" depends on SMP 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 CPU_OPS_SUNXI bool "Use SUNXI cpu ops instead of psci" depends on SMP && ARCH_SUN50I help Use sunxi cpu ops for SMP. If use psci say N here. config SCHED_SMT bool "SMT scheduler support" depends on SMP 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 HMP_FREQUENCY_INVARIANT_SCALE bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP" depends on HMP_VARIABLE_SCALE && CPU_FREQ 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_LITTLE_PACKING bool "Small task packing for HMP" depends on SCHED_HMP default n help Allows the HMP Scheduler to pack small tasks into CPUs in the smallest HMP domain. Controlled by two sysfs files in sys/kernel/hmp. packing_enable: 1 to enable, 0 to disable packing. Default 1. packing_limit: runqueue load ratio where a RQ is considered to be full. Default is NICE_0_LOAD * 9/8. 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 help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. 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 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 SYS_SUPPORTS_HUGETLBFS def_bool y config ARCH_WANT_GENERAL_HUGETLB def_bool y config ARCH_WANT_HUGE_PMD_SHARE def_bool y if !ARM64_64K_PAGES config HAVE_ARCH_TRANSPARENT_HUGEPAGE def_bool y 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 FORCE_MAX_ZONEORDER int default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) default "11" 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. config CC_STACKPROTECTOR bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" help This option turns on the -fstack-protector GCC feature. This feature puts, at the beginning of functions, a canary value on the stack just before the return address, and validates the value just before actually returning. Stack based buffer overflows (that need to overwrite this return address) now also overwrite the canary, which gets detected and the attack is then neutralized via a kernel panic. This feature requires gcc version 4.2 or above. 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. config EFI bool "UEFI runtime support" depends on OF && !CPU_BIG_ENDIAN select LIBFDT select UCS2_STRING select EFI_PARAMS_FROM_FDT default y help This option provides support for runtime services provided by UEFI firmware (such as non-volatile variables, realtime clock, and platform reset). A UEFI stub is also provided to allow the kernel to be booted as an EFI application. This is only useful on systems that have UEFI firmware. config SUNXI_OOPS_HOOK bool "Homlet platform oops hook" default n help Hooks for oops: 1. enable sdcard jtag 2. print cpu/dram/gpu frequency and temperature 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" source "drivers/cpufreq/Kconfig" config ARCH_SUSPEND_POSSIBLE def_bool y config ARM64_CPU_SUSPEND def_bool PM_SLEEP endmenu menu "CPU Power Management" source "drivers/cpuidle/Kconfig" endmenu source "net/Kconfig" source "drivers/Kconfig" source "drivers/firmware/Kconfig" source "fs/Kconfig" source "arch/arm64/kvm/Kconfig" source "arch/arm64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" if CRYPTO source "arch/arm64/crypto/Kconfig" endif source "lib/Kconfig"