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From: Sumit Garg <sumit.garg@linaro.org>
To: maz@kernel.org, catalin.marinas@arm.com, will@kernel.org
Cc: linux-arm-kernel@lists.infradead.org, tglx@linutronix.de,
	jason@lakedaemon.net, mark.rutland@arm.com,
	julien.thierry.kdev@gmail.com, dianders@chromium.org,
	daniel.thompson@linaro.org, jason.wessel@windriver.com,
	kgdb-bugreport@lists.sourceforge.net,
	linux-kernel@vger.kernel.org, Sumit Garg <sumit.garg@linaro.org>
Subject: [PATCH v4 3/5] arm64: smp: Allocate and setup IPI as NMI
Date: Fri, 11 Sep 2020 18:58:42 +0530	[thread overview]
Message-ID: <1599830924-13990-4-git-send-email-sumit.garg@linaro.org> (raw)
In-Reply-To: <1599830924-13990-1-git-send-email-sumit.garg@linaro.org>

Allocate an unused IPI that can be turned as NMI using ipi_nmi framework.
Also, invoke corresponding NMI setup/teardown APIs.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
 arch/arm64/kernel/smp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b6bde26..3f3b1ff 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -43,6 +43,7 @@
 #include <asm/daifflags.h>
 #include <asm/kvm_mmu.h>
 #include <asm/mmu_context.h>
+#include <asm/nmi.h>
 #include <asm/numa.h>
 #include <asm/processor.h>
 #include <asm/smp_plat.h>
@@ -962,6 +963,8 @@ static void ipi_setup(int cpu)
 
 	for (i = 0; i < nr_ipi; i++)
 		enable_percpu_irq(ipi_irq_base + i, 0);
+
+	ipi_nmi_setup(cpu);
 }
 
 static void ipi_teardown(int cpu)
@@ -973,6 +976,8 @@ static void ipi_teardown(int cpu)
 
 	for (i = 0; i < nr_ipi; i++)
 		disable_percpu_irq(ipi_irq_base + i);
+
+	ipi_nmi_teardown(cpu);
 }
 
 void __init set_smp_ipi_range(int ipi_base, int n)
@@ -993,6 +998,9 @@ void __init set_smp_ipi_range(int ipi_base, int n)
 		irq_set_status_flags(ipi_base + i, IRQ_HIDDEN);
 	}
 
+	if (n > nr_ipi)
+		set_smp_ipi_nmi(ipi_base + nr_ipi);
+
 	ipi_irq_base = ipi_base;
 
 	/* Setup the boot CPU immediately */
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Sumit Garg <sumit.garg@linaro.org>
To: maz@kernel.org, catalin.marinas@arm.com, will@kernel.org
Cc: mark.rutland@arm.com, Sumit Garg <sumit.garg@linaro.org>,
	daniel.thompson@linaro.org, jason@lakedaemon.net,
	kgdb-bugreport@lists.sourceforge.net, dianders@chromium.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, jason.wessel@windriver.com,
	tglx@linutronix.de, julien.thierry.kdev@gmail.com
Subject: [PATCH v4 3/5] arm64: smp: Allocate and setup IPI as NMI
Date: Fri, 11 Sep 2020 18:58:42 +0530	[thread overview]
Message-ID: <1599830924-13990-4-git-send-email-sumit.garg@linaro.org> (raw)
In-Reply-To: <1599830924-13990-1-git-send-email-sumit.garg@linaro.org>

Allocate an unused IPI that can be turned as NMI using ipi_nmi framework.
Also, invoke corresponding NMI setup/teardown APIs.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
 arch/arm64/kernel/smp.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b6bde26..3f3b1ff 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -43,6 +43,7 @@
 #include <asm/daifflags.h>
 #include <asm/kvm_mmu.h>
 #include <asm/mmu_context.h>
+#include <asm/nmi.h>
 #include <asm/numa.h>
 #include <asm/processor.h>
 #include <asm/smp_plat.h>
@@ -962,6 +963,8 @@ static void ipi_setup(int cpu)
 
 	for (i = 0; i < nr_ipi; i++)
 		enable_percpu_irq(ipi_irq_base + i, 0);
+
+	ipi_nmi_setup(cpu);
 }
 
 static void ipi_teardown(int cpu)
@@ -973,6 +976,8 @@ static void ipi_teardown(int cpu)
 
 	for (i = 0; i < nr_ipi; i++)
 		disable_percpu_irq(ipi_irq_base + i);
+
+	ipi_nmi_teardown(cpu);
 }
 
 void __init set_smp_ipi_range(int ipi_base, int n)
@@ -993,6 +998,9 @@ void __init set_smp_ipi_range(int ipi_base, int n)
 		irq_set_status_flags(ipi_base + i, IRQ_HIDDEN);
 	}
 
+	if (n > nr_ipi)
+		set_smp_ipi_nmi(ipi_base + nr_ipi);
+
 	ipi_irq_base = ipi_base;
 
 	/* Setup the boot CPU immediately */
-- 
2.7.4


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  parent reply	other threads:[~2020-09-11 16:22 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-11 13:28 [PATCH v4 0/5] arm64: Add framework to turn an IPI as NMI Sumit Garg
2020-09-11 13:28 ` Sumit Garg
2020-09-11 13:28 ` [PATCH v4 1/5] arm64: Add framework to turn " Sumit Garg
2020-09-11 13:28   ` Sumit Garg
2020-10-10  1:58   ` Masayoshi Mizuma
2020-10-10  1:58     ` Masayoshi Mizuma
2020-10-10  9:34     ` Marc Zyngier
2020-10-10  9:34       ` Marc Zyngier
2020-10-10 15:13       ` Masayoshi Mizuma
2020-10-10 15:13         ` Masayoshi Mizuma
2020-10-12 12:19         ` Sumit Garg
2020-10-12 12:19           ` Sumit Garg
2020-10-13  3:23           ` Masayoshi Mizuma
2020-10-13  3:23             ` Masayoshi Mizuma
2020-10-12 12:21     ` Sumit Garg
2020-10-12 12:21       ` Sumit Garg
2020-09-11 13:28 ` [PATCH v4 2/5] irqchip/gic-v3: Enable support for SGIs to act as NMIs Sumit Garg
2020-09-11 13:28   ` Sumit Garg
2020-09-11 13:28 ` Sumit Garg [this message]
2020-09-11 13:28   ` [PATCH v4 3/5] arm64: smp: Allocate and setup IPI as NMI Sumit Garg
2020-09-11 13:28 ` [PATCH v4 4/5] arm64: kgdb: Round up cpus using " Sumit Garg
2020-09-11 13:28   ` Sumit Garg
2020-09-11 13:28 ` [PATCH v4 5/5] arm64: ipi_nmi: Add support for NMI backtrace Sumit Garg
2020-09-11 13:28   ` Sumit Garg

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