Prevent usage of shared memory regions where the length is zero,
as such configurations are not valid and may lead to unexpected behavior.

Signed-off-by: Sami Uddin <sami.md.ko@gmail.com>
Message-Id: <20250511222153.2332-1-sami.md.ko@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Admin virtqueue is just another virtqueue nothing that special about it.
The current implementation treats it somehow separate though in terms
of creation and deletion. Unify the admin virtqueue creation and
deletion flows to be aligned with the rest of virtqueues, creating
it from vp_find_vqs_*() helpers. Let the admin virtqueue to be deleted
by vp_del_vqs() as the rest.

Call vp_find_one_vq_msix() with slow_path argument being "true" to make
sure that in case of limited interrupt vectors the config vector is used
for admin queue.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240716113552.80599-10-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Since the original virtio_find_vqs() is no longer present, rename
virtio_find_vqs_info() back to virtio_find_vqs().

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-20-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

All callers of virtio_find_vqs() and virtio_find_vqs_ctx() were
converted to use virtio_find_vqs_info(). Remove no longer used helpers.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-19-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Since the original find_vqs() is no longer present, rename
find_vqs_info() back to find_vqs().

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-10-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

As it is no longer used, remove it.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-9-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Since there are no more implementations of find_vqs() op, call
virtio_find_vqs_info() from virtio_find_single_vq() directly.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-8-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Introduce a structure virtio_queue_info to carry name, callback and ctx
together. In order to allow config implementations to accept config op
with array of virtio_queue_info structures, introduce a new
find_vqs_info() op. Do the needed conversion in virtio_find_vqs_ctx().
Note that whole virtio_find_vqs_ctx() is going to be eventually removed
at the and of this patchset.

Suggested-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-5-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

In order to prepare for conversion of virtio_find_vqs*() arguments, make
virtio_find_single_vq() to call virtio_find_vqs() instead of
op directly.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-4-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

In order to prepare for conversion of virtio_find_vqs*() arguments, make
virtio_find_vqs() to call virtio_find_vqs_ctx() instead of op directly.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-3-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>