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Alon Levy authored
Alexander Larsson found irq injection to Windows guests stopped after a migration. The symptom was the mouse stopped working. Reproduction steps are: 1. On src, start qemu with a virtio-serial port without any backend 2. On dest, start qemu with a virtio-serial port with a backend 3. Migrate. Upon migration, the older code detected the change in backend connection status, and sent a notification to the guest. However, it's not guaranteed that the apic is ready to inject irqs into the guest, and the irq line remained high, resulting in any future interrupts going unnoticed by the guest as well. Add a new timer based on vm_clock for 1 ns in the future from post_load to do the event send in case host_connected differs between migration source and target. RHBZ: 867366 Signed-off-by: Alon Levy <alevy@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> # verbose commit log
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