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Wed, 31 Jan 2024 07:44:53 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8F2FB20040; Wed, 31 Jan 2024 07:44:53 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5626820043; Wed, 31 Jan 2024 07:44:53 +0000 (GMT) Received: from a46lp67.lnxne.boe (unknown [9.152.108.100]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 31 Jan 2024 07:44:53 +0000 (GMT) From: Janosch Frank To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, imbrenda@linux.ibm.com, thuth@redhat.com, david@redhat.com, nsg@linux.ibm.com, nrb@linux.ibm.com Subject: [kvm-unit-tests PATCH v2 4/5] s390x: mvpg: Dirty CC before mvpg execution Date: Wed, 31 Jan 2024 07:44:26 +0000 Message-Id: <20240131074427.70871-5-frankja@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240131074427.70871-1-frankja@linux.ibm.com> References: <20240131074427.70871-1-frankja@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 8BleQ0_4E0e7SoR75m1eWpJ0cOtbLZZ7 X-Proofpoint-GUID: jEj8MI9trhCk9zWhEd1xct51rg57cyYK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-31_02,2024-01-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=705 bulkscore=0 phishscore=0 lowpriorityscore=0 clxscore=1011 adultscore=0 spamscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401310057 Dirtying the CC allows us to find missing CC changes when mvpg is emulated. Signed-off-by: Janosch Frank --- s390x/mvpg.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/s390x/mvpg.c b/s390x/mvpg.c index 296338d4..62d42e36 100644 --- a/s390x/mvpg.c +++ b/s390x/mvpg.c @@ -40,12 +40,14 @@ static uint8_t *fresh; static inline int mvpg(unsigned long r0, void *dest, void *src) { register unsigned long reg0 asm ("0") = r0; + uint64_t bogus_cc = 3; int cc; - asm volatile(" mvpg %1,%2\n" + asm volatile(" tmll %[bogus_cc],3\n" + " mvpg %1,%2\n" " ipm %0\n" " srl %0,28" - : "=&d" (cc) : "a" (dest), "a" (src), "d" (reg0) + : "=&d" (cc) : "a" (dest), "a" (src), "d" (reg0), [bogus_cc] "d" (bogus_cc) : "memory", "cc"); return cc; } -- 2.40.1