On Wed, Oct 14, 2020 at 04:42:09PM +0530, Sumit Garg wrote:
> 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.g...@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..129ebfb 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);
> }
>
> #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);
> +
> + ipi_nmi_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_ipi_nmi(ipi_base + nr_ipi);
> +
> ipi_irq_base = ipi_base;
>
> /* Setup the boot CPU immediately */
> --
Looks good to me. Please feel free to add:
Reviewed-by: Masayoshi Mizuma <m.miz...@jp.fujitsu.com>
Thanks!
Masa
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