From: Liao Chang <liaochang1@huawei.com>
To: <catalin.marinas@arm.com>, <will@kernel.org>, <maz@kernel.org>,
<oliver.upton@linux.dev>, <james.morse@arm.com>,
<suzuki.poulose@arm.com>, <yuzenghui@huawei.com>,
<tglx@linutronix.de>, <mark.rutland@arm.com>, <ardb@kernel.org>,
<broonie@kernel.org>, <liaochang1@huawei.com>,
<anshuman.khandual@arm.com>, <miguel.luis@oracle.com>,
<joey.gouly@arm.com>, <ryan.roberts@arm.com>,
<jeremy.linton@arm.com>, <ericchancf@google.com>,
<kristina.martsenko@arm.com>, <robh@kernel.org>,
<scott@os.amperecomputing.com>, <songshuaishuai@tinylab.org>,
<shijie@os.amperecomputing.com>, <akpm@linux-foundation.org>,
<bhe@redhat.com>, <horms@kernel.org>, <mhiramat@kernel.org>,
<rmk+kernel@armlinux.org.uk>, <shahuang@redhat.com>,
<takakura@valinux.co.jp>, <dianders@chromium.org>,
<swboyd@chromium.org>, <sumit.garg@linaro.org>,
<frederic@kernel.org>, <reijiw@google.com>,
<akihiko.odaki@daynix.com>, <ruanjinjie@huawei.com>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <kvmarm@lists.linux.dev>
Subject: [PATCH v3 3/8] arm64/nmi: Add Kconfig for NMI
Date: Mon, 15 Apr 2024 06:47:53 +0000 [thread overview]
Message-ID: <20240415064758.3250209-4-liaochang1@huawei.com> (raw)
In-Reply-To: <20240415064758.3250209-1-liaochang1@huawei.com>
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: Liao Chang <liaochang1@huawei.com>
---
arch/arm64/Kconfig | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7b11c98b3e84..c7d00d0cae9e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -2095,6 +2095,23 @@ config ARM64_EPAN
if the cpu does not implement the feature.
endmenu # "ARMv8.7 architectural features"
+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
--
2.34.1
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next prev parent reply other threads:[~2024-04-15 6:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 6:47 [PATCH v3 0/8] Rework the DAIF mask, unmask and track API Liao Chang
2024-04-15 6:47 ` [PATCH v3 1/8] arm64/sysreg: Add definitions for immediate versions of MSR ALLINT Liao Chang
2024-05-03 16:00 ` Mark Rutland
2024-05-06 12:12 ` Liao, Chang
2024-05-06 15:15 ` Mark Brown
2024-05-07 7:41 ` Liao, Chang
2024-05-07 14:52 ` Mark Brown
2024-06-03 3:26 ` Liao, Chang
2024-06-04 13:29 ` Mark Brown
2024-06-05 9:52 ` Liao, Chang
2024-06-14 4:00 ` Liao, Chang
2024-04-15 6:47 ` [PATCH v3 2/8] arm64/cpufeature: Detect PE support for FEAT_NMI Liao Chang
2024-04-15 6:47 ` Liao Chang [this message]
2024-04-15 6:47 ` [PATCH v3 4/8] arm64: daifflags: Add logical exception masks covering DAIF + PMR + ALLINT Liao Chang
2024-04-15 6:47 ` [PATCH v3 5/8] arm64: Unify exception masking at entry and exit of exception Liao Chang
2024-04-15 6:47 ` [PATCH v3 6/8] arm64: Deprecate old local_daif_{mask,save,restore} Liao Chang
2024-04-15 6:47 ` [PATCH v3 7/8] irqchip/gic-v3: Improve the maintainability of NMI masking in GIC driver Liao Chang
2024-04-15 6:47 ` [PATCH v3 8/8] arm64: kprobe: Keep NMI maskabled while kprobe is stepping xol Liao Chang
2024-05-03 17:10 ` [PATCH v3 0/8] Rework the DAIF mask, unmask and track API Mark Rutland
2024-05-06 12:12 ` Liao, Chang
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