From: Sumit Garg sumit.garg@linaro.org
maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8PLUM?from=project-issue CVE: NA Reference: https://lore.kernel.org/all/1604317487-14543-4-git-send-email-sumit.garg@lin...
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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 Signed-off-by: Wei Li liwei391@huawei.com Reviewed-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Signed-off-by: Ruan Jinjie ruanjinjie@huawei.com Signed-off-by: Liao Chen liaochen4@huawei.com --- 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 960b98b43506..8288549ca5f7 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> @@ -935,6 +936,8 @@ 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 @@ -947,6 +950,8 @@ 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
@@ -968,6 +973,9 @@ 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 */