From: Mark Brown <broonie@kernel.org> Since NMI handling is in some fairly hot paths we provide a Kconfig option which allows support to be compiled out when not needed. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Jie Liu <liujie375@h-partners.com> --- arch/arm64/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 2b74d81fce9e..fc074fd5f040 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1651,6 +1651,19 @@ endmenu menu "ARMv8.8 architectural features" +config ARM64_NMI + bool "Enable support for Non-maskable Interrupts (NMI)" + default y + help + Non-maskable interrupts are an architecture and GIC feature + which allow the system to configure some interrupts to be + configured to have superpriority, allowing them to be handled + before other interrupts and masked for shorter periods of time. + + The feature is detected at runtime, and will remain disabled + if the cpu does not implement the feature. It will also be + disabled if pseudo NMIs are enabled at runtime. + config ARM64_HAFT bool "Support for Hardware managed Access Flag for Table Descriptors" depends on ARM64_HW_AFDBM -- 2.25.1