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arm/arm64: KVM: vgic: kick the specific vcpu instead of iterating through all

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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: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Shannon Zhao 2014-11-19 10:11:25 +00:00 committed by Marc Zyngier
parent b1e952b4e4
commit 016ed39c54
1 changed files with 10 additions and 5 deletions
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15
virt/kvm/arm/vgic.c
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@ -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) unsigned int irq_num, bool level)
{ {
struct vgic_dist *dist = &kvm->arch.vgic; struct vgic_dist *dist = &kvm->arch.vgic;
@ -1673,7 +1673,7 @@ static bool vgic_update_irq_pending(struct kvm *kvm, int cpuid,
out: out:
spin_unlock(&dist->lock); spin_unlock(&dist->lock);
return ret; return ret ? cpuid : -EINVAL;
} }
/** /**
@ -1693,9 +1693,14 @@ out:
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num, int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
bool level) bool level)
{ {
if (likely(vgic_initialized(kvm)) && int vcpu_id;
vgic_update_irq_pending(kvm, cpuid, irq_num, level))
vgic_kick_vcpus(kvm); 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; return 0;
} }