diff mbox series

[v1,12/16] virtio: add userspace migration of packed ring

Message ID 1542895581-10721-13-git-send-email-wexu@redhat.com
State New
Headers show
Series packed ring virtio-net backend support | expand

Commit Message

Wei Xu Nov. 22, 2018, 2:06 p.m. UTC 
From: Wei Xu <wexu@redhat.com>

Signed-off-by: Wei Xu <wexu@redhat.com>
---
 hw/virtio/virtio.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Comments

Jason Wang Nov. 22, 2018, 2:45 p.m. UTC | #1 
On 2018/11/22 下午10:06, wexu@redhat.com wrote:
> From: Wei Xu <wexu@redhat.com>
>
> Signed-off-by: Wei Xu <wexu@redhat.com>


I think you need subsection. Otherwise you will break migration 
compatibility.

Thanks


> ---
>   hw/virtio/virtio.c | 18 ++++++++++++++++++
>   1 file changed, 18 insertions(+)
>
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 240c4e3..64d5c04 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -2558,6 +2558,12 @@ int virtio_save(VirtIODevice *vdev, QEMUFile *f)
>            */
>           qemu_put_be64(f, vdev->vq[i].vring.desc);
>           qemu_put_be16s(f, &vdev->vq[i].last_avail_idx);
> +        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].avail_wrap_counter);
> +        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].event_wrap_counter);
> +        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].used_wrap_counter);
> +        qemu_put_be16s(f, &vdev->vq[i].used_idx);
> +        qemu_put_be16s(f, &vdev->vq[i].shadow_avail_idx);
> +        qemu_put_be32s(f, &vdev->vq[i].inuse);
>           if (k->save_queue) {
>               k->save_queue(qbus->parent, i, f);
>           }
> @@ -2705,6 +2711,14 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
>           }
>           vdev->vq[i].vring.desc = qemu_get_be64(f);
>           qemu_get_be16s(f, &vdev->vq[i].last_avail_idx);
> +
> +        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].avail_wrap_counter);
> +        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].event_wrap_counter);
> +        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].used_wrap_counter);
> +        qemu_get_be16s(f, &vdev->vq[i].used_idx);
> +        qemu_get_be16s(f, &vdev->vq[i].shadow_avail_idx);
> +        qemu_get_be32s(f, &vdev->vq[i].inuse);
> +
>           vdev->vq[i].signalled_used_valid = false;
>           vdev->vq[i].notification = true;
>   
> @@ -2786,6 +2800,10 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
>                   virtio_queue_update_rings(vdev, i);
>               }
>   
> +            if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
> +                continue;
> +            }
> +
>               nheads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx;
>               /* Check it isn't doing strange things with descriptor numbers. */
>               if (nheads > vdev->vq[i].vring.num) {
Wei Xu Jan. 16, 2019, 5:50 p.m. UTC | #2 
On Thu, Nov 22, 2018 at 10:45:36PM +0800, Jason Wang wrote:
> 
> On 2018/11/22 下午10:06, wexu@redhat.com wrote:
> >From: Wei Xu <wexu@redhat.com>
> >
> >Signed-off-by: Wei Xu <wexu@redhat.com>
> 
> 
> I think you need subsection. Otherwise you will break migration
> compatibility.

ok, thanks.

Wei

> 
> Thanks
> 
> 
> >---
> >  hw/virtio/virtio.c | 18 ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> >
> >diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> >index 240c4e3..64d5c04 100644
> >--- a/hw/virtio/virtio.c
> >+++ b/hw/virtio/virtio.c
> >@@ -2558,6 +2558,12 @@ int virtio_save(VirtIODevice *vdev, QEMUFile *f)
> >           */
> >          qemu_put_be64(f, vdev->vq[i].vring.desc);
> >          qemu_put_be16s(f, &vdev->vq[i].last_avail_idx);
> >+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].avail_wrap_counter);
> >+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].event_wrap_counter);
> >+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].used_wrap_counter);
> >+        qemu_put_be16s(f, &vdev->vq[i].used_idx);
> >+        qemu_put_be16s(f, &vdev->vq[i].shadow_avail_idx);
> >+        qemu_put_be32s(f, &vdev->vq[i].inuse);
> >          if (k->save_queue) {
> >              k->save_queue(qbus->parent, i, f);
> >          }
> >@@ -2705,6 +2711,14 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
> >          }
> >          vdev->vq[i].vring.desc = qemu_get_be64(f);
> >          qemu_get_be16s(f, &vdev->vq[i].last_avail_idx);
> >+
> >+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].avail_wrap_counter);
> >+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].event_wrap_counter);
> >+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].used_wrap_counter);
> >+        qemu_get_be16s(f, &vdev->vq[i].used_idx);
> >+        qemu_get_be16s(f, &vdev->vq[i].shadow_avail_idx);
> >+        qemu_get_be32s(f, &vdev->vq[i].inuse);
> >+
> >          vdev->vq[i].signalled_used_valid = false;
> >          vdev->vq[i].notification = true;
> >@@ -2786,6 +2800,10 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
> >                  virtio_queue_update_rings(vdev, i);
> >              }
> >+            if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
> >+                continue;
> >+            }
> >+
> >              nheads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx;
> >              /* Check it isn't doing strange things with descriptor numbers. */
> >              if (nheads > vdev->vq[i].vring.num) {
>
diff mbox series

Patch

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 240c4e3..64d5c04 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2558,6 +2558,12 @@  int virtio_save(VirtIODevice *vdev, QEMUFile *f)
          */
         qemu_put_be64(f, vdev->vq[i].vring.desc);
         qemu_put_be16s(f, &vdev->vq[i].last_avail_idx);
+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].avail_wrap_counter);
+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].event_wrap_counter);
+        qemu_put_8s(f, (const uint8_t *)&vdev->vq[i].used_wrap_counter);
+        qemu_put_be16s(f, &vdev->vq[i].used_idx);
+        qemu_put_be16s(f, &vdev->vq[i].shadow_avail_idx);
+        qemu_put_be32s(f, &vdev->vq[i].inuse);
         if (k->save_queue) {
             k->save_queue(qbus->parent, i, f);
         }
@@ -2705,6 +2711,14 @@  int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
         }
         vdev->vq[i].vring.desc = qemu_get_be64(f);
         qemu_get_be16s(f, &vdev->vq[i].last_avail_idx);
+
+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].avail_wrap_counter);
+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].event_wrap_counter);
+        qemu_get_8s(f, (uint8_t *)&vdev->vq[i].used_wrap_counter);
+        qemu_get_be16s(f, &vdev->vq[i].used_idx);
+        qemu_get_be16s(f, &vdev->vq[i].shadow_avail_idx);
+        qemu_get_be32s(f, &vdev->vq[i].inuse);
+
         vdev->vq[i].signalled_used_valid = false;
         vdev->vq[i].notification = true;
 
@@ -2786,6 +2800,10 @@  int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id)
                 virtio_queue_update_rings(vdev, i);
             }
 
+            if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
+                continue;
+            }
+
             nheads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx;
             /* Check it isn't doing strange things with descriptor numbers. */
             if (nheads > vdev->vq[i].vring.num) {