Hi, By testing Measurement with KVM unit tests I fall on this: we forgot to test the alignment of the MBO for measurement format 1. The MB must be aligned on 128bits otherwise an operand exception is recognized. Regards, Pierre Pierre Morel (1): css: SCHIB measurement block origin must be aligned target/s390x/ioinst.c | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.25.1