diff options
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 189 |
1 files changed, 63 insertions, 126 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 735456feb..07d1811aa 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -20,6 +20,7 @@ config ARM64 select ARM_GIC_V2M if PCI_MSI select ARM_GIC_V3 select ARM_GIC_V3_ITS if PCI_MSI + select ARM_PSCI_FW select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK @@ -28,9 +29,10 @@ config ARM64 select EDAC_SUPPORT select GENERIC_ALLOCATOR select GENERIC_CLOCKEVENTS - select GENERIC_CLOCKEVENTS_BROADCAST if SMP + select GENERIC_CLOCKEVENTS_BROADCAST select GENERIC_CPU_AUTOPROBE select GENERIC_EARLY_IOREMAP + select GENERIC_IDLE_POLL_SETUP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW_LEVEL @@ -53,6 +55,7 @@ config ARM64 select HAVE_C_RECORDMCOUNT select HAVE_CC_STACKPROTECTOR select HAVE_CMPXCHG_DOUBLE + select HAVE_CMPXCHG_LOCAL select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG @@ -117,6 +120,14 @@ config TRACE_IRQFLAGS_SUPPORT config RWSEM_XCHGADD_ALGORITHM def_bool y +config GENERIC_BUG + def_bool y + depends on BUG + +config GENERIC_BUG_RELATIVE_POINTERS + def_bool y + depends on GENERIC_BUG + config GENERIC_HWEIGHT def_bool y @@ -141,6 +152,9 @@ config NEED_DMA_MAP_STATE config NEED_SG_DMA_LENGTH def_bool y +config SMP + def_bool y + config SWIOTLB def_bool y @@ -164,110 +178,7 @@ source "init/Kconfig" source "kernel/Kconfig.freezer" -menu "Platform selection" - -config ARCH_EXYNOS - bool - help - This enables support for Samsung Exynos SoC family - -config ARCH_EXYNOS7 - bool "ARMv8 based Samsung Exynos7" - select ARCH_EXYNOS - select COMMON_CLK_SAMSUNG - select HAVE_S3C2410_WATCHDOG if WATCHDOG - select HAVE_S3C_RTC if RTC_CLASS - select PINCTRL - select PINCTRL_EXYNOS - - help - This enables support for Samsung Exynos7 SoC family - -config ARCH_FSL_LS2085A - bool "Freescale LS2085A SOC" - help - This enables support for Freescale LS2085A SOC. - -config ARCH_HISI - bool "Hisilicon SoC Family" - help - This enables support for Hisilicon ARMv8 SoC family - -config ARCH_MEDIATEK - bool "Mediatek MT65xx & MT81xx ARMv8 SoC" - select ARM_GIC - select PINCTRL - help - Support for Mediatek MT65xx & MT81xx ARMv8 SoCs - -config ARCH_QCOM - bool "Qualcomm Platforms" - select PINCTRL - help - This enables support for the ARMv8 based Qualcomm chipsets. - -config ARCH_SEATTLE - bool "AMD Seattle SoC Family" - help - This enables support for AMD Seattle SOC Family - -config ARCH_TEGRA - bool "NVIDIA Tegra SoC Family" - select ARCH_HAS_RESET_CONTROLLER - select ARCH_REQUIRE_GPIOLIB - select CLKDEV_LOOKUP - select CLKSRC_MMIO - select CLKSRC_OF - select GENERIC_CLOCKEVENTS - select HAVE_CLK - select PINCTRL - select RESET_CONTROLLER - help - This enables support for the NVIDIA Tegra SoC family. - -config ARCH_TEGRA_132_SOC - bool "NVIDIA Tegra132 SoC" - depends on ARCH_TEGRA - select PINCTRL_TEGRA124 - select USB_ULPI if USB_PHY - select USB_ULPI_VIEWPORT if USB_PHY - help - Enable support for NVIDIA Tegra132 SoC, based on the Denver - ARMv8 CPU. The Tegra132 SoC is similar to the Tegra124 SoC, - but contains an NVIDIA Denver CPU complex in place of - Tegra124's "4+1" Cortex-A15 CPU complex. - -config ARCH_SPRD - bool "Spreadtrum SoC platform" - help - Support for Spreadtrum ARM based SoCs - -config ARCH_THUNDER - bool "Cavium Inc. Thunder SoC Family" - help - This enables support for Cavium's Thunder Family of SoCs. - -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_ZYNQMP - bool "Xilinx ZynqMP Family" - help - This enables support for Xilinx ZynqMP Family - -endmenu +source "arch/arm64/Kconfig.platforms" menu "Bus support" @@ -494,22 +405,8 @@ config CPU_BIG_ENDIAN 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 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 @@ -517,7 +414,6 @@ config SCHED_MC 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 @@ -526,23 +422,17 @@ config SCHED_SMT config NR_CPUS int "Maximum number of CPUs (2-4096)" range 2 4096 - depends on SMP # These have to remain sorted largest to smallest default "64" 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 UP_LATE_INIT - def_bool y - depends on !SMP - config HZ int default 100 @@ -684,6 +574,53 @@ config SETEND_EMULATION If unsure, say Y endif +menu "ARMv8.1 architectural features" + +config ARM64_HW_AFDBM + bool "Support for hardware updates of the Access and Dirty page flags" + default y + help + The ARMv8.1 architecture extensions introduce support for + hardware updates of the access and dirty information in page + table entries. When enabled in TCR_EL1 (HA and HD bits) on + capable processors, accesses to pages with PTE_AF cleared will + set this bit instead of raising an access flag fault. + Similarly, writes to read-only pages with the DBM bit set will + clear the read-only bit (AP[2]) instead of raising a + permission fault. + + Kernels built with this configuration option enabled continue + to work on pre-ARMv8.1 hardware and the performance impact is + minimal. If unsure, say Y. + +config ARM64_PAN + bool "Enable support for Privileged Access Never (PAN)" + default y + help + Privileged Access Never (PAN; part of the ARMv8.1 Extensions) + prevents the kernel or hypervisor from accessing user-space (EL0) + memory directly. + + Choosing this option will cause any unprotected (not using + copy_to_user et al) memory access to fail with a permission fault. + + The feature is detected at runtime, and will remain as a 'nop' + instruction if the cpu does not implement the feature. + +config ARM64_LSE_ATOMICS + bool "Atomic instructions" + help + As part of the Large System Extensions, ARMv8.1 introduces new + atomic instructions that are designed specifically to scale in + very large systems. + + Say Y here to make use of these instructions for the in-kernel + atomic routines. This incurs a small overhead on CPUs that do + not support these instructions and requires the kernel to be + built with binutils >= 2.25. + +endmenu + endmenu menu "Boot options" |