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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 13 Mar 2020 13:01:43 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02DD1fBI34668950 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 13 Mar 2020 13:01:41 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 77A9CA4054; Fri, 13 Mar 2020 13:01:41 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE612A405B; Fri, 13 Mar 2020 13:01:40 +0000 (GMT) Received: from p-imbrenda (unknown [9.145.9.63]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 13 Mar 2020 13:01:40 +0000 (GMT) Date: Fri, 13 Mar 2020 13:57:33 +0100 From: Claudio Imbrenda To: Janosch Frank Subject: Re: [PATCH v9 09/15] s390x: protvirt: Set guest IPL PSW In-Reply-To: <20200311132151.172389-10-frankja@linux.ibm.com> References: <20200311132151.172389-1-frankja@linux.ibm.com> <20200311132151.172389-10-frankja@linux.ibm.com> Organization: IBM X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 20031313-0012-0000-0000-000003907731 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031313-0013-0000-0000-000021CD4CB5 Message-Id: <20200313135733.634c0008@p-imbrenda> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-13_04:2020-03-12, 2020-03-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=999 suspectscore=0 spamscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003130067 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: borntraeger@de.ibm.com, qemu-s390x@nongnu.org, cohuck@redhat.com, qemu-devel@nongnu.org, david@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, 11 Mar 2020 09:21:45 -0400 Janosch Frank wrote: > Handling of CPU reset and setting of the IPL psw from guest storage at > offset 0 is done by a Ultravisor call. Let's only fetch it if > necessary. > > Signed-off-by: Janosch Frank > Reviewed-by: Thomas Huth > Reviewed-by: David Hildenbrand > --- > target/s390x/cpu.c | 22 +++++++++++++--------- > 1 file changed, 13 insertions(+), 9 deletions(-) > > diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c > index 84029f14814b4980..a48d39f139cdc1c4 100644 > --- a/target/s390x/cpu.c > +++ b/target/s390x/cpu.c > @@ -78,16 +78,20 @@ static bool s390_cpu_has_work(CPUState *cs) > static void s390_cpu_load_normal(CPUState *s) > { > S390CPU *cpu = S390_CPU(s); > - uint64_t spsw = ldq_phys(s->as, 0); > - > - cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL; > - /* > - * Invert short psw indication, so SIE will report a > specification > - * exception if it was not set. > - */ > - cpu->env.psw.mask ^= PSW_MASK_SHORTPSW; > - cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR; > + uint64_t spsw; > > + if (!s390_is_pv()) { > + spsw = ldq_phys(s->as, 0); > + cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL; > + /* > + * Invert short psw indication, so SIE will report a > specification > + * exception if it was not set. > + */ > + cpu->env.psw.mask ^= PSW_MASK_SHORTPSW; > + cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR; > + } else { > + s390_cpu_set_state(S390_CPU_STATE_LOAD, cpu); > + } > s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); > } > #endif I don't understand why you set the state to S390_CPU_STATE_LOAD and then immediately afterwards to S390_CPU_STATE_OPERATING, especially considering that both do the same