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Wed, 31 Jan 2024 07:44:54 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D09FF20040; 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 979452004B; 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 5/5] s390x: sclp: Dirty CC before sclp execution Date: Wed, 31 Jan 2024 07:44:27 +0000 Message-Id: <20240131074427.70871-6-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-GUID: oi7II8zStO00HOQQQHZL76YeZoQ2DJXk X-Proofpoint-ORIG-GUID: b8XdkYgdBjKqjpEiSjSDcCyq18287qMd 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_03,2024-01-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 mlxscore=0 mlxlogscore=695 impostorscore=0 priorityscore=1501 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401310058 Dirtying the CC allows us to find missing CC changes when sclp is emulated. Signed-off-by: Janosch Frank --- s390x/sclp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/s390x/sclp.c b/s390x/sclp.c index ccbaa913..53fce0cf 100644 --- a/s390x/sclp.c +++ b/s390x/sclp.c @@ -399,6 +399,7 @@ out: static void test_instbits(void) { SCCBHeader *h = (SCCBHeader *)pagebuf; + uint64_t bogus_cc = 1; int cc; sclp_mark_busy(); @@ -406,10 +407,12 @@ static void test_instbits(void) sclp_setup_int(); asm volatile( + " tmll %[bogus_cc],3\n" " .insn rre,0xb2204200,%1,%2\n" /* servc %1,%2 */ " ipm %0\n" " srl %0,28" - : "=&d" (cc) : "d" (valid_code), "a" (__pa(pagebuf)) + : "=&d" (cc) + : "d" (valid_code), "a" (__pa(pagebuf)), [bogus_cc] "d" (bogus_cc) : "cc", "memory"); /* No exception, but also no command accepted, so no interrupt is * expected. We need to clear the flag manually otherwise we will -- 2.40.1