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Commit 016ed39c authored by Shannon Zhao's avatar Shannon Zhao Committed by Marc Zyngier
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arm/arm64: KVM: vgic: kick the specific vcpu instead of iterating through all 



When call kvm_vgic_inject_irq to inject interrupt, we can known which
vcpu the interrupt for by the irq_num and the cpuid. So we should just
kick this vcpu to avoid iterating through all.

Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarShannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent b1e952b4

virt/kvm/arm/vgic.c

+10 −5
Original line number Diff line number Diff line
@@ -1607,7 +1607,7 @@ static int vgic_validate_injection(struct kvm_vcpu *vcpu, int irq, int level) 
	}

}



static bool vgic_update_irq_pending(struct kvm *kvm, int cpuid,

static int vgic_update_irq_pending(struct kvm *kvm, int cpuid,

				  unsigned int irq_num, bool level)

{

	struct vgic_dist *dist = &kvm->arch.vgic;
@@ -1673,7 +1673,7 @@ static bool vgic_update_irq_pending(struct kvm *kvm, int cpuid, 
out:

	spin_unlock(&dist->lock);



	return ret;

	return ret ? cpuid : -EINVAL;

}



/**
@@ -1693,9 +1693,14 @@ static bool vgic_update_irq_pending(struct kvm *kvm, int cpuid, 
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,

			bool level)

{

	if (likely(vgic_initialized(kvm)) &&

	    vgic_update_irq_pending(kvm, cpuid, irq_num, level))

		vgic_kick_vcpus(kvm);

	int vcpu_id;



	if (likely(vgic_initialized(kvm))) {

		vcpu_id = vgic_update_irq_pending(kvm, cpuid, irq_num, level);

		if (vcpu_id >= 0)

			/* kick the specified vcpu */

			kvm_vcpu_kick(kvm_get_vcpu(kvm, vcpu_id));

	}



	return 0;

}