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virtio: add vhost support for virtio devices

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This patch adds a get_vhost() callback function for VirtIODevices that
returns the device's corresponding vhost_dev structure, if the vhost
device is running. This patch also adds a vhost_started flag for
VirtIODevices.

Previously, a VirtIODevice wouldn't be able to tell if its corresponding
vhost device was active or not.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1648819405-25696-3-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jonah Palmer 2022-04-01 09:23:19 -04:00 • committed by Michael S. Tsirkin
parent 3857cd5c7f
commit c255488d67
12 changed files with 76 additions and 1 deletions
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7
hw/block/vhost-user-blk.c
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@ -569,6 +569,12 @@ static void vhost_user_blk_instance_init(Object *obj)
"/disk@0,0", DEVICE(obj));
}
static struct vhost_dev *vhost_user_blk_get_vhost(VirtIODevice *vdev)
{
VHostUserBlk *s = VHOST_USER_BLK(vdev);
return &s->dev;
}
static const VMStateDescription vmstate_vhost_user_blk = {
.name = "vhost-user-blk",
.minimum_version_id = 1,
@ -603,6 +609,7 @@ static void vhost_user_blk_class_init(ObjectClass *klass, void *data)
vdc->get_features = vhost_user_blk_get_features;
vdc->set_status = vhost_user_blk_set_status;
vdc->reset = vhost_user_blk_reset;
vdc->get_vhost = vhost_user_blk_get_vhost;
}
static const TypeInfo vhost_user_blk_info = {