From: Pierre Morel <pmorel@linux.ibm.com>
To: qemu-devel@nongnu.org
Cc: thuth@redhat.com, pmorel@linux.ibm.com, david@redhat.com,
cohuck@redhat.com, pasic@linux.ibm.com, borntraeger@de.ibm.com,
qemu-s390x@nongnu.org, rth@twiddle.net
Subject: [PATCH v2 1/1] css: SCHIB measurement block origin must be aligned
Date: Fri, 19 Feb 2021 14:39:33 +0100 [thread overview]
Message-ID: <1613741973-3711-2-git-send-email-pmorel@linux.ibm.com> (raw)
In-Reply-To: <1613741973-3711-1-git-send-email-pmorel@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 <pmorel@linux.ibm.com>
---
target/s390x/ioinst.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c
index a412926d27..1ee11522e1 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;
}
--
2.25.1
next prev parent reply other threads:[~2021-02-19 13:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 13:39 [PATCH v2 0/1] css: SCHIB measurement block origin must be aligned Pierre Morel
2021-02-19 13:39 ` Pierre Morel [this message]
2021-02-19 13:41 ` [PATCH v2 1/1] " Thomas Huth
2021-02-19 18:49 ` Pierre Morel
2021-02-22 11:11 ` [PATCH v2 0/1] " Cornelia Huck
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