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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
config ARMV7_COMPAT_CP15_BARRIER
bool "Allow applications to use the CP15 barrier operations"
depends on ARMV7_COMPAT
default y
help
This option allows applications to use deprecated CP15 barrier
instructions. This is useful because this was the only way to create
a barrier on older ARM processors.
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).
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.
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"
|