virtio: move ioeventfd_started flag to VirtioBusState

This simplifies the code and removes the ioeventfd_started
and ioeventfd_set_started callback.  The only difference is
in how virtio-ccw handles an error---it doesn't disable
ioeventfd forever anymore.  It was the only backend to do
so, and if desired this behavior should be implemented in

virtio-bus.c.

Instead of ioeventfd_started, the ioeventfd_assign callback now
determines whether the virtio bus supports host notifiers.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 12a9e7998b..04a9655d84 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -89,25 +89,9 @@ typedef struct {
     uint32_t guest_page_shift;
     /* virtio-bus */
     VirtioBusState bus;
-    bool ioeventfd_started;
     bool format_transport_address;
 } VirtIOMMIOProxy;
 
-static bool virtio_mmio_ioeventfd_started(DeviceState *d)
-{
-    VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
-
-    return proxy->ioeventfd_started;
-}
-
-static void virtio_mmio_ioeventfd_set_started(DeviceState *d, bool started,
-                                              bool err)
-{
-    VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
-
-    proxy->ioeventfd_started = started;
-}
-
 static bool virtio_mmio_ioeventfd_disabled(DeviceState *d)
 {
     return !kvm_eventfds_enabled();
@@ -547,8 +531,6 @@ static void virtio_mmio_bus_class_init(ObjectClass *klass, void *data)
     k->save_config = virtio_mmio_save_config;
     k->load_config = virtio_mmio_load_config;
     k->set_guest_notifiers = virtio_mmio_set_guest_notifiers;
-    k->ioeventfd_started = virtio_mmio_ioeventfd_started;
-    k->ioeventfd_set_started = virtio_mmio_ioeventfd_set_started;
     k->ioeventfd_disabled = virtio_mmio_ioeventfd_disabled;
     k->ioeventfd_assign = virtio_mmio_ioeventfd_assign;
     k->has_variable_vring_alignment = true;