vhost: implement VHOST_SET_VRING_ERR

[PATCH v2 0/2] vhost: implement VHOST_SET_VRING_ERR

Vladimir Sementsov-Ogievskiy posted 2 patches 1 year, 10 months ago

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git fetch https://github.com/patchew-project/qemu tags/patchew/20220623161325.18813-1-vsementsov@yandex-team.ru

Maintainers: "Michael S. Tsirkin" <mst@redhat.com>

hw/virtio/vhost-backend.c         |  7 ++++++
hw/virtio/vhost-user.c            |  6 +++++
hw/virtio/vhost.c                 | 37 +++++++++++++++++++++++++++++++
include/hw/virtio/vhost-backend.h |  3 +++
include/hw/virtio/vhost.h         |  1 +
5 files changed, 54 insertions(+)

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[PATCH v2 0/2] vhost: implement VHOST_SET_VRING_ERR

Posted by Vladimir Sementsov-Ogievskiy 1 year, 10 months ago

Both vhost-user and kernel vhost can inform Qemu about virt-queue error
through separate eventfd. Let's use this possibility.

For now just dump a message on error like elsewhere in vhost.c.

Further plan is implement QAPI event for this and may be some other
vhost/virtio errors to make it possible to instantly notify user about
problems in vm. That would be a separate patch or patchset.

v2: don't add QAPI event for now. Let's first realize the vhost
interface.

Yandex-ST: CLOUD-101375

Konstantin Khlebnikov (2):
  vhost: add method vhost_set_vring_err
  vhost: setup error eventfd and dump errors

 hw/virtio/vhost-backend.c         |  7 ++++++
 hw/virtio/vhost-user.c            |  6 +++++
 hw/virtio/vhost.c                 | 37 +++++++++++++++++++++++++++++++
 include/hw/virtio/vhost-backend.h |  3 +++
 include/hw/virtio/vhost.h         |  1 +
 5 files changed, 54 insertions(+)

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2.25.1