diff options
Diffstat (limited to 'hw/s390x/virtio-ccw.c')
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 96789569a7..0a997e17b6 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -455,6 +455,26 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) } } break; + case CCW_CMD_READ_STATUS: + if (check_len) { + if (ccw.count != sizeof(status)) { + ret = -EINVAL; + break; + } + } else if (ccw.count < sizeof(status)) { + /* Can't execute command. */ + ret = -EINVAL; + break; + } + if (!ccw.cda) { + ret = -EFAULT; + } else { + address_space_stb(&address_space_memory, ccw.cda, vdev->status, + MEMTXATTRS_UNSPECIFIED, NULL); + sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);; + ret = 0; + } + break; case CCW_CMD_WRITE_STATUS: if (check_len) { if (ccw.count != sizeof(status)) { |