[RFC PATCH v2 40/45] arm64: nmi: Add Kconfig for NMI
From: Vladimir Murzin <hidden>
Date: 2026-07-27 16:38:07
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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: Ada Couprie Diaz <redacted> Signed-off-by: Vladimir Murzin <redacted> --- arch/arm64/Kconfig | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e36dc4831200..968a9d97549a 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -2195,6 +2195,24 @@ endmenu # "ARMv8.7 architectural features" config AS_HAS_MOPS def_bool $(as-instr,.arch_extension mops) +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. + +endmenu # "ARMv8.8 architectural features" + + menu "ARMv8.9 architectural features" config ARM64_POE
--
2.34.1