[PATCH 07/10] KVM: ARM: vGIC: Optimize the vGIC flush hwstate function.

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When queue irq(whatever SGI, PPI, SPI) failed, that means the ICH_LRn is not
enough, so, if this circs happened, skip the follow irq queue logic, and flag
the HCR.UIE directly.

Signed-off-by: wanghaibin <wanghaibin.wang@xxxxxxxxxx>
---
 virt/kvm/arm/vgic.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 8390475..12026e6 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1415,20 +1415,26 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
 
 	/* SGIs */
 	for_each_set_bit(i, vgic_cpu->pending_percpu, VGIC_NR_SGIS) {
-		if (!vgic_queue_sgi(vcpu, i))
+		if (!vgic_queue_sgi(vcpu, i)) {
 			overflow = 1;
+			goto epilog;
+		}
 	}
 
 	/* PPIs */
 	for_each_set_bit_from(i, vgic_cpu->pending_percpu, VGIC_NR_PRIVATE_IRQS) {
-		if (!vgic_queue_hwirq(vcpu, i))
+		if (!vgic_queue_hwirq(vcpu, i)) {
 			overflow = 1;
+			goto epilog;
+		}
 	}
 
 	/* SPIs */
 	for_each_set_bit(i, vgic_cpu->pending_shared, vgic_nr_shared_irqs(dist)) {
-		if (!vgic_queue_hwirq(vcpu, i + VGIC_NR_PRIVATE_IRQS))
+		if (!vgic_queue_hwirq(vcpu, i + VGIC_NR_PRIVATE_IRQS)) {
 			overflow = 1;
+			goto epilog;
+		}
 	}
 
 epilog:
-- 
1.7.1


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