Type-0 ccws need to have a count > 0 for any command other than TIC.
Generate a channel-program check if this is not the case.
Reviewed-by: Matthew Rosato <mjros...@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com>
---
hw/s390x/css.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 2c0782c..9596280 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -290,6 +290,10 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr
ccw_addr)
((ccw.cmd_code & 0xf0) != 0)) {
return -EINVAL;
}
+ if (!sch->ccw_fmt_1 && (ccw.count == 0) &&
+ (ccw.cmd_code != CCW_CMD_TIC)) {
+ return -EINVAL;
+ }
if (ccw.flags & CCW_FLAG_SUSPEND) {
return -EINPROGRESS;
--
2.5.1
