[RFC PATCH v5 15/26] vdpa: Save call_fd in vhost-vdpa

[Eugenio Pérez]

We need to know it to switch to Shadow VirtQueue.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/hw/virtio/vhost-vdpa.h | 2 ++
 hw/virtio/vhost-vdpa.c         | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index 6d60092c96..2f57b17208 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -33,6 +33,8 @@ typedef struct vhost_vdpa {
     GPtrArray *shadow_vqs;
     struct vhost_dev *dev;
     int kick_fd[VIRTIO_QUEUE_MAX];
+    /* File descriptor the device uses to call VM/SVQ */
+    int call_fd[VIRTIO_QUEUE_MAX];
     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
 } VhostVDPA;
 
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index c388705e73..64f71bd51b 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -761,7 +761,12 @@ static int vhost_vdpa_set_vring_kick(struct vhost_dev *dev,
 static int vhost_vdpa_set_vring_call(struct vhost_dev *dev,
                                        struct vhost_vring_file *file)
 {
+    struct vhost_vdpa *v = dev->opaque;
+    int vdpa_idx = vhost_vdpa_get_vq_index(dev, file->index);
+
     trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd);
+
+    v->call_fd[vdpa_idx] = file->fd;
     return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file);
 }
 
-- 
2.27.0