From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 30 Jul 2015 08:19:24 +0000 (+0200)
Subject: ioapic: coalesce level interrupts
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c5955a561ccdb95ede14e83de0ee8eec00868bd3;p=qemu.git

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>
---

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;
             }