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charset="utf-8" Add the desc_group field to struct vhost_vdpa, and get it populated when the corresponding vq is initialized at net_vhost_vdpa_init. If the vq does not have descriptor group capability, or it doesn't have a dedicated ASID group to host descriptors other than the data buffers, desc_group will be set to a negative value -1. Signed-off-by: Si-Wei Liu --- include/hw/virtio/vhost-vdpa.h | 1 + net/vhost-vdpa.c | 15 +++++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index 6533ad2..63493ff 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -87,6 +87,7 @@ typedef struct vhost_vdpa { Error *migration_blocker; VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX]; IOMMUNotifier n; + int64_t desc_group; } VhostVDPA; =20 int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_r= ange); diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index cb5705d..1a738b2 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -1855,11 +1855,22 @@ static NetClientState *net_vhost_vdpa_init(NetClien= tState *peer, =20 ret =3D vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, n= vqs); if (ret) { - qemu_del_net_client(nc); - return NULL; + goto err; } =20 + if (is_datapath) { + ret =3D vhost_vdpa_probe_desc_group(vdpa_device_fd, features, + 0, &desc_group, errp); + if (unlikely(ret < 0)) { + goto err; + } + } + s->vhost_vdpa.desc_group =3D desc_group; return nc; + +err: + qemu_del_net_client(nc); + return NULL; } =20 static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **err= p) --=20 1.8.3.1