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Subject[PATCH v7 3/7] arm64: smp: Assign and setup an IPI as NMI
Date
Assign an unused IPI which can be turned as NMI using ipi_nmi framework.
Also, invoke corresponding dynamic IPI 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 82e75fc..2e118e2 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);
+
+ dynamic_ipi_setup(cpu);
}

#ifdef CONFIG_HOTPLUG_CPU
@@ -974,6 +977,8 @@ static void ipi_teardown(int cpu)

for (i = 0; i < nr_ipi; i++)
disable_percpu_irq(ipi_irq_base + i);
+
+ dynamic_ipi_teardown(cpu);
}
#endif

@@ -995,6 +1000,9 @@ 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_dynamic_ipi(ipi_base + nr_ipi);
+
ipi_irq_base = ipi_base;

/* Setup the boot CPU immediately */
--
2.7.4
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