[Qemu-devel] [PATCH-RFC 03/13] virtio: add iofd/irqfd support

["Michael S. Tsirkin" <mst@redhat.com>]

Add binding API to set iofd/irqfd support.
Will be used by vhost.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/virtio.c |   13 ++++++++++---
 hw/virtio.h |    4 ++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/hw/virtio.c b/hw/virtio.c
index 8e3c9ad..b9ec863 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -572,6 +572,12 @@ 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)
 {
     /* Make sure used ring is updated before we check NO_INTERRUPT. */
@@ -582,8 +588,7 @@ 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)
@@ -696,8 +701,10 @@ 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 ca840e1..193b3f9 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -88,6 +88,8 @@ typedef struct {
     int (*load_config)(void * opaque, QEMUFile *f);
     int (*load_queue)(void * opaque, int n, QEMUFile *f);
     unsigned (*get_features)(void * opaque);
+    int (*set_irqfd)(void * opaque, int n, int fd, bool assigned);
+    int (*set_queuefd)(void * opaque, int n, int fd, bool assigned);
 } VirtIOBindings;
 
 #define VIRTIO_PCI_QUEUE_MAX 16
@@ -196,6 +198,8 @@ struct VirtQueue
     int inuse;
     uint16_t vector;
     void (*handle_output)(VirtIODevice *vdev, VirtQueue *vq);
+    VirtIODevice *vdev;
 };
 
+void virtio_irq(VirtIODevice *vdev, VirtQueue *vq);
 #endif
-- 
1.6.6.rc1.43.gf55cc