KVM: PPC: Update int_pending also on dequeue

When having a decrementor interrupt pending, the dequeuing happens manually
through an mtdec instruction. This instruction simply calls dequeue on that
interrupt, so the int_pending hint doesn't get updated.

This patch enables updating the int_pending hint also on dequeue, thus
correctly enabling guests to stay in guest contexts more often.

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 02a9cb165d5..7adea632065 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -201,6 +201,9 @@ static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 {
         clear_bit(kvmppc_book3s_vec2irqprio(vec),
                   &vcpu->arch.pending_exceptions);
+
+        if (!vcpu->arch.pending_exceptions)
+                vcpu->arch.shared->int_pending = 0;
 }
 
 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)