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virtio-ccw: respond to READ_STATUS command 

This patch adds the response to the READ_STATUS CCW command.

Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Pierre Morel 2016-09-07 12:58:40 +02:00 committed by Cornelia Huck
parent 1e4738b2d4
commit e32652f759
2 changed files with 21 additions and 0 deletions
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20
hw/s390x/virtio-ccw.c
View File

@ -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)) {

1
hw/s390x/virtio-ccw.h
View File

@ -45,6 +45,7 @@
#define CCW_CMD_SET_IND 0x43
#define CCW_CMD_SET_CONF_IND 0x53
#define CCW_CMD_READ_VQ_CONF 0x32
#define CCW_CMD_READ_STATUS 0x72
#define CCW_CMD_SET_IND_ADAPTER 0x73
#define CCW_CMD_SET_VIRTIO_REV 0x83