From c5955a561ccdb95ede14e83de0ee8eec00868bd3 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 30 Jul 2015 10:19:24 +0200
Subject: ioapic: coalesce level interrupts

If a level-triggered interrupt goes down and back up before the
corresponding EOI, it should be coalesced.  This fixes one testcase
in kvm-unit-tests' ioapic.flat.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/intc/ioapic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'hw/intc')

diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index b527932382..6ad3c66c1b 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
@@ -98,7 +98,9 @@ static void ioapic_set_irq(void *opaque, int vector, int level)
             /* level triggered */
             if (level) {
                 s->irr |= mask;
-                ioapic_service(s);
+                if (!(entry & IOAPIC_LVT_REMOTE_IRR)) {
+                    ioapic_service(s);
+                }
             } else {
                 s->irr &= ~mask;
             }
-- 
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