From: Pierre Morel <pmo...@linux.ibm.com> The Measurement Block Origin inside the SCHIB is used when Measurement Block format 1 is in used and must be aligned on 64 bytes otherwise an operand exception is recognized when issuing the Modify Sub CHannel (MSCH) instruction.
Signed-off-by: Pierre Morel <pmo...@linux.ibm.com> Reviewed-by: Thomas Huth <th...@redhat.com> Message-Id: <1613741973-3711-2-git-send-email-pmo...@linux.ibm.com> Signed-off-by: Cornelia Huck <coh...@redhat.com> --- target/s390x/ioinst.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index a412926d2780..1ee11522e150 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -121,6 +121,12 @@ static int ioinst_schib_valid(SCHIB *schib) if (be32_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_XMWME) { return 0; } + /* for MB format 1 bits 26-31 of word 11 must be 0 */ + /* MBA uses words 10 and 11, it means align on 2**6 */ + if ((be16_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_MBFC) && + (be64_to_cpu(schib->mba) & 0x03fUL)) { + return 0; + } return 1; } -- 2.26.2