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Wed, 31 Jan 2024 14:16:38 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A1BA2004B; Wed, 31 Jan 2024 14:16:38 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 08A5E20043; Wed, 31 Jan 2024 14:16:38 +0000 (GMT) Received: from [9.171.45.77] (unknown [9.171.45.77]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 31 Jan 2024 14:16:37 +0000 (GMT) Message-ID: Date: Wed, 31 Jan 2024 15:16:37 +0100 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [kvm-unit-tests PATCH v2 1/5] lib: s390x: sigp: Dirty CC before sigp execution Content-Language: en-US To: Claudio Imbrenda Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, thuth@redhat.com, david@redhat.com, nsg@linux.ibm.com, nrb@linux.ibm.com References: <20240131074427.70871-1-frankja@linux.ibm.com> <20240131074427.70871-2-frankja@linux.ibm.com> <20240131125618.42f508d7@p-imbrenda> From: Janosch Frank Autocrypt: addr=frankja@linux.ibm.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: GwJIpfOMbTmXTZKAC-QqyyNe8ejY5tvS X-Proofpoint-ORIG-GUID: cpMYK_LQT2dFz831XuQDyftpvb2Ymzyv 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_08,2024-01-30_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=934 impostorscore=0 priorityscore=1501 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401310109 On 1/31/24 12:56, Claudio Imbrenda wrote: > On Wed, 31 Jan 2024 07:44:23 +0000 > Janosch Frank wrote: > >> Dirtying the CC allows us to find missing CC changes when sigp is >> emulated. >> >> Signed-off-by: Janosch Frank >> --- >> lib/s390x/asm/sigp.h | 6 +++++- >> 1 file changed, 5 insertions(+), 1 deletion(-) >> >> diff --git a/lib/s390x/asm/sigp.h b/lib/s390x/asm/sigp.h >> index 61d2c625..4eae95d0 100644 >> --- a/lib/s390x/asm/sigp.h >> +++ b/lib/s390x/asm/sigp.h >> @@ -49,13 +49,17 @@ static inline int sigp(uint16_t addr, uint8_t order, unsigned long parm, >> uint32_t *status) >> { >> register unsigned long reg1 asm ("1") = parm; >> + uint64_t bogus_cc = SIGP_CC_NOT_OPERATIONAL; >> int cc; >> >> asm volatile( >> + " tmll %[bogus_cc],3\n" >> " sigp %1,%2,0(%3)\n" >> " ipm %0\n" >> " srl %0,28\n" >> - : "=d" (cc), "+d" (reg1) : "d" (addr), "a" (order) : "cc"); >> + : "=d" (cc), "+d" (reg1) >> + : "d" (addr), "a" (order), [bogus_cc] "d" (bogus_cc) >> + : "cc"); > > since you are doing changes in this inline asm, could you put names for > all the parameters? that way it will be more consistent and readable. > NACK, not in this series.