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virtio: move ioeventfd_started flag to VirtioBusState

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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>
This commit is contained in:
Paolo Bonzini 2016-10-21 22:48:06 +02:00 • committed by Michael S. Tsirkin
parent 4ddcc2d5cb
commit b13d396227
10 changed files with 16 additions and 79 deletions
Download patch file Download diff file Expand all files Collapse all files

18
hw/virtio/virtio-mmio.c
View file

@ -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;