Messages in this thread Patch in this message | | | From | Douglas Anderson <> | Subject | [PATCH v8 03/10] arm64: smp: Assign and setup an IPI as NMI | Date | Wed, 19 Apr 2023 15:55:57 -0700 |
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From: Sumit Garg <sumit.garg@linaro.org>
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> Reviewed-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com> Tested-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> ---
Changes in v8: - dynamic_ipi_setup() and dynamic_ipi_teardown() no longer take cpu param
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 4e8327264255..94ff063527c6 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> @@ -938,6 +939,8 @@ static void ipi_setup(int cpu) for (i = 0; i < nr_ipi; i++) enable_percpu_irq(ipi_irq_base + i, 0); + + dynamic_ipi_setup(); } #ifdef CONFIG_HOTPLUG_CPU @@ -950,6 +953,8 @@ static void ipi_teardown(int cpu) for (i = 0; i < nr_ipi; i++) disable_percpu_irq(ipi_irq_base + i); + + dynamic_ipi_teardown(); } #endif @@ -971,6 +976,9 @@ 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 */ -- 2.40.0.634.g4ca3ef3211-goog
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