From: Mark Brown <broonie@kernel.org> kunpeng inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I90N2C CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git/commit/?h=a... ---------------------------------------------------------------------- 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> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- arch/arm64/Kconfig | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6a7d7bf4b35a..73470b7d43f3 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1647,6 +1647,23 @@ config ARM64_TLB_RANGE 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. + +endmenu # "ARMv8.8 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y -- 2.25.1