config ARM64
def_bool y
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+ select ARCH_USE_CMPXCHG_LOCKREF
+ select ARCH_HAS_OPP
+ 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 BUILDTIME_EXTABLE_SORT
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_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_TRACEHOOK
select HAVE_C_RECORDMCOUNT
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
config TRACE_IRQFLAGS_SUPPORT
def_bool y
-config GENERIC_LOCKBREAK
- def_bool y
- depends on SMP && PREEMPT
-
-config RWSEM_GENERIC_SPINLOCK
+config RWSEM_XCHGADD_ALGORITHM
def_bool y
config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
def_bool y
-config ZONE_DMA32
+config ZONE_DMA
def_bool y
config ARCH_DMA_ADDR_T_64BIT
config IOMMU_HELPER
def_bool SWIOTLB
+config FIX_EARLYCON_MEM
+ def_bool y
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
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
+
endmenu
menu "Bus support"
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
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 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
- default "4"
+ # 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.
source kernel/Kconfig.preempt
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
+
source "mm/Kconfig"
+config FORCE_MAX_ZONEORDER
+ int
+ default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
+ default "11"
+
endmenu
menu "Boot options"
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 "security/Kconfig"
source "crypto/Kconfig"
+if CRYPTO
+source "arch/arm64/crypto/Kconfig"
+endif
source "lib/Kconfig"
projects / firefly-linux-kernel-4.4.55.git / blobdiff