Commit 9abfed35 authored by Sumit Garg's avatar Sumit Garg Committed by Liao Chen
Browse files

arm64: smp: Assign and setup an IPI as NMI 

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@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: default avatarSumit Garg <sumit.garg@linaro.org>
Signed-off-by: default avatarWei Li <liwei391@huawei.com>
Reviewed-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: default avatarRuan Jinjie <ruanjinjie@huawei.com>
Signed-off-by: default avatarLiao Chen <liaochen4@huawei.com>
parent 2e7fabab

arch/arm64/kernel/smp.c

+8 −0
Original line number Diff line number Diff line
@@ -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 */