diff options
| -rw-r--r-- | drivers/s390/kvm/virtio_ccw.c | 54 |
1 files changed, 42 insertions, 12 deletions
diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c index f6eb47b4775b..1c21c08f33be 100644 --- a/drivers/s390/kvm/virtio_ccw.c +++ b/drivers/s390/kvm/virtio_ccw.c @@ -68,13 +68,22 @@ struct virtio_ccw_device { void *airq_info; }; -struct vq_info_block { +struct vq_info_block_legacy { __u64 queue; __u32 align; __u16 index; __u16 num; } __packed; +struct vq_info_block { + __u64 desc; + __u32 res0; + __u16 index; + __u16 num; + __u64 avail; + __u64 used; +} __packed; + struct virtio_feature_desc { __u32 features; __u8 index; @@ -100,7 +109,10 @@ struct virtio_ccw_vq_info { struct virtqueue *vq; int num; void *queue; - struct vq_info_block *info_block; + union { + struct vq_info_block s; + struct vq_info_block_legacy l; + } *info_block; int bit_nr; struct list_head node; long cookie; @@ -411,13 +423,22 @@ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw) spin_unlock_irqrestore(&vcdev->lock, flags); /* Release from host. */ - info->info_block->queue = 0; - info->info_block->align = 0; - info->info_block->index = index; - info->info_block->num = 0; + if (vcdev->revision == 0) { + info->info_block->l.queue = 0; + info->info_block->l.align = 0; + info->info_block->l.index = index; + info->info_block->l.num = 0; + ccw->count = sizeof(info->info_block->l); + } else { + info->info_block->s.desc = 0; + info->info_block->s.index = index; + info->info_block->s.num = 0; + info->info_block->s.avail = 0; + info->info_block->s.used = 0; + ccw->count = sizeof(info->info_block->s); + } ccw->cmd_code = CCW_CMD_SET_VQ; ccw->flags = 0; - ccw->count = sizeof(*info->info_block); ccw->cda = (__u32)(unsigned long)(info->info_block); ret = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_VQ | index); @@ -500,13 +521,22 @@ static struct virtqueue *virtio_ccw_setup_vq(struct virtio_device *vdev, } /* Register it with the host. */ - info->info_block->queue = (__u64)info->queue; - info->info_block->align = KVM_VIRTIO_CCW_RING_ALIGN; - info->info_block->index = i; - info->info_block->num = info->num; + if (vcdev->revision == 0) { + info->info_block->l.queue = (__u64)info->queue; + info->info_block->l.align = KVM_VIRTIO_CCW_RING_ALIGN; + info->info_block->l.index = i; + info->info_block->l.num = info->num; + ccw->count = sizeof(info->info_block->l); + } else { + info->info_block->s.desc = (__u64)info->queue; + info->info_block->s.index = i; + info->info_block->s.num = info->num; + info->info_block->s.avail = (__u64)virtqueue_get_avail(vq); + info->info_block->s.used = (__u64)virtqueue_get_used(vq); + ccw->count = sizeof(info->info_block->s); + } ccw->cmd_code = CCW_CMD_SET_VQ; ccw->flags = 0; - ccw->count = sizeof(*info->info_block); ccw->cda = (__u32)(unsigned long)(info->info_block); err = ccw_io_helper(vcdev, ccw, VIRTIO_CCW_DOING_SET_VQ | i); if (err) { |