Add binding API to set host/guest notifiers.

Will be used by vhost.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

---

 hw/virtio.c |   13 ++++++++++---

 hw/virtio.h |    5 ++++-

 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/hw/virtio.c b/hw/virtio.c

index fa7184a..c2b80aa 100644

--- a/hw/virtio.c

+++ b/hw/virtio.c

@@ -594,6 +594,12 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,

     return &vdev->vq[i];

 }

+void virtio_irq(VirtIODevice *vdev, VirtQueue *vq)

+{

+    vdev->isr |= 0x01;

+    virtio_notify_vector(vdev, vq->vector);

+}

+

 void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)

 {

     /* Always notify when queue is empty (when feature acknowledge) */

@@ -602,8 +608,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)

          (vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))

         return;

-    vdev->isr |= 0x01;

-    virtio_notify_vector(vdev, vq->vector);

+    virtio_irq(vdev, vq);

 }

 void virtio_notify_config(VirtIODevice *vdev)

@@ -716,8 +721,10 @@ VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,

     vdev->queue_sel = 0;

     vdev->config_vector = VIRTIO_NO_VECTOR;

     vdev->vq = qemu_mallocz(sizeof(VirtQueue) * VIRTIO_PCI_QUEUE_MAX);

-    for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++)

+    for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {

         vdev->vq[i].vector = VIRTIO_NO_VECTOR;

+        vdev->vq[i].vdev = vdev;

+    }

     vdev->name = name;

     vdev->config_len = config_size;

diff --git a/hw/virtio.h b/hw/virtio.h

index 3994cc9..10a0959 100644

--- a/hw/virtio.h

+++ b/hw/virtio.h

@@ -18,6 +18,7 @@

 #include "net.h"

 #include "qdev.h"

 #include "sysemu.h"

+#include "notifier.h"

 /* from Linux's linux/virtio_config.h */

@@ -88,6 +89,8 @@ typedef struct {

     int (*load_config)(void * opaque, QEMUFile *f);

     int (*load_queue)(void * opaque, int n, QEMUFile *f);

     unsigned (*get_features)(void * opaque);

+    int (*guest_notifier)(void * opaque, int n, bool assigned);

+    int (*host_notifier)(void * opaque, int n, bool assigned);

 } VirtIOBindings;

 #define VIRTIO_PCI_QUEUE_MAX 64

@@ -180,5 +183,5 @@ void virtio_net_exit(VirtIODevice *vdev);

 	DEFINE_PROP_BIT("indirect_desc", _state, _field, \

 			VIRTIO_RING_F_INDIRECT_DESC, true)

-

+void virtio_irq(VirtIODevice *vdev, VirtQueue *vq);

 #endif

-- 

1.6.6.144.g5c3af