Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio updates from Michael Tsirkin:

 - Per vq sizes in vdpa

 - Info query for block devices support in vdpa

 - DMA sync callbacks in vduse

 - Fixes, cleanups

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (35 commits)
  virtio_net: rename free_old_xmit_skbs to free_old_xmit
  virtio_net: unify the code for recycling the xmit ptr
  virtio-net: add cond_resched() to the command waiting loop
  virtio-net: convert rx mode setting to use workqueue
  virtio: packed: fix unmap leak for indirect desc table
  vDPA: report virtio-blk flush info to user space
  vDPA: report virtio-block read-only info to user space
  vDPA: report virtio-block write zeroes configuration to user space
  vDPA: report virtio-block discarding configuration to user space
  vDPA: report virtio-block topology info to user space
  vDPA: report virtio-block MQ info to user space
  vDPA: report virtio-block max segments in a request to user space
  vDPA: report virtio-block block-size to user space
  vDPA: report virtio-block max segment size to user space
  vDPA: report virtio-block capacity to user space
  virtio: make virtio_bus const
  vdpa: make vdpa_bus const
  vDPA/ifcvf: implement vdpa_config_ops.get_vq_num_min
  vDPA/ifcvf: get_max_vq_size to return max size
  virtio_vdpa: create vqs with the actual size
  ...

2 files changed, 17 insertions, 0 deletions

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 4b2fcb228a0a79..c64ded183f8dd8 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -697,6 +697,9 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq,
 	hdr = buf;
 	gso = &hdr->gso;
 
+	if (!sock_hlen)
+		memset(buf, 0, pad);
+
 	if ((gso->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
 	    vhost16_to_cpu(vq, gso->csum_start) +
 	    vhost16_to_cpu(vq, gso->csum_offset) + 2 >
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index bc4a51e4638b46..ba52d128aeb76b 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -595,6 +595,9 @@ static long vhost_vdpa_suspend(struct vhost_vdpa *v)
 	const struct vdpa_config_ops *ops = vdpa->config;
 	int ret;
 
+	if (!(ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK))
+		return 0;
+
 	if (!ops->suspend)
 		return -EOPNOTSUPP;
 
@@ -615,6 +618,9 @@ static long vhost_vdpa_resume(struct vhost_vdpa *v)
 	const struct vdpa_config_ops *ops = vdpa->config;
 	int ret;
 
+	if (!(ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK))
+		return 0;
+
 	if (!ops->resume)
 		return -EOPNOTSUPP;
 
@@ -681,6 +687,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
 		if (!ops->set_group_asid)
 			return -EOPNOTSUPP;
 		return ops->set_group_asid(vdpa, idx, s.num);
+	case VHOST_VDPA_GET_VRING_SIZE:
+		if (!ops->get_vq_size)
+			return -EOPNOTSUPP;
+		s.index = idx;
+		s.num = ops->get_vq_size(vdpa, idx);
+		if (copy_to_user(argp, &s, sizeof(s)))
+			return -EFAULT;
+		return 0;
 	case VHOST_GET_VRING_BASE:
 		r = ops->get_vq_state(v->vdpa, idx, &vq_state);
 		if (r)