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-rw-r--r--arch/arm64/Kconfig36
1 files changed, 34 insertions, 2 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cfbf307d6dc4..4fab69620719 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -643,6 +643,25 @@ config QCOM_FALKOR_ERRATUM_E1041
If unsure, say Y.
+config FUJITSU_ERRATUM_010001
+ bool "Fujitsu-A64FX erratum E#010001: Undefined fault may occur wrongly"
+ default y
+ help
+ This option adds workaround for Fujitsu-A64FX erratum E#010001.
+ On some variants of the Fujitsu-A64FX cores ver(1.0, 1.1), memory
+ accesses may cause undefined fault (Data abort, DFSC=0b111111).
+ This fault occurs under a specific hardware condition when a
+ load/store instruction performs an address translation using:
+ case-1 TTBR0_EL1 with TCR_EL1.NFD0 == 1.
+ case-2 TTBR0_EL2 with TCR_EL2.NFD0 == 1.
+ case-3 TTBR1_EL1 with TCR_EL1.NFD1 == 1.
+ case-4 TTBR1_EL2 with TCR_EL2.NFD1 == 1.
+
+ The workaround is to ensure these bits are clear in TCR_ELx.
+ The workaround only affect the Fujitsu-A64FX.
+
+ If unsure, say Y.
+
endmenu
@@ -792,8 +811,7 @@ config SCHED_SMT
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
- # These have to remain sorted largest to smallest
- default "64"
+ default "256"
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
@@ -1328,6 +1346,20 @@ config ARM64_MODULE_PLTS
bool
select HAVE_MOD_ARCH_SPECIFIC
+config ARM64_PSEUDO_NMI
+ bool "Support for NMI-like interrupts"
+ select CONFIG_ARM_GIC_V3
+ help
+ Adds support for mimicking Non-Maskable Interrupts through the use of
+ GIC interrupt priority. This support requires version 3 or later of
+ Arm GIC.
+
+ This high priority configuration for interrupts needs to be
+ explicitly enabled by setting the kernel parameter
+ "irqchip.gicv3_pseudo_nmi" to 1.
+
+ If unsure, say N
+
config RELOCATABLE
bool
help