If the guest issues an INT command targetting a VLPI, let's
call into the irq_set_irqchip_state() helper to make it pending
on the physical side.

This works just as well if userspace decides to inject an interrupt
using the normal userspace API...

Acked-by: Christoffer Dall <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
---
 virt/kvm/arm/vgic/vgic-its.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 89768d2b6a91..b2a678d131d0 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -578,6 +578,10 @@ static int vgic_its_trigger_msi(struct kvm *kvm, struct 
vgic_its *its,
        if (err)
                return err;
 
+       if (irq->hw)
+               return irq_set_irqchip_state(irq->host_irq,
+                                            IRQCHIP_STATE_PENDING, true);
+
        spin_lock(&irq->irq_lock);
        irq->pending_latch = true;
        vgic_queue_irq_unlock(kvm, irq);
-- 
2.11.0

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