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Wed, 15 Jul 2020 09:41:17 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1A24A4C04E; Wed, 15 Jul 2020 09:41:17 +0000 (GMT) Received: from linux01.pok.stglabs.ibm.com (unknown [9.114.17.81]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 15 Jul 2020 09:41:16 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH 3/7] pc-bios: s390x: Remove unneeded dasd-ipl.c reset psw mask changes Date: Wed, 15 Jul 2020 05:40:41 -0400 Message-Id: <20200715094045.381984-4-frankja@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200715094045.381984-1-frankja@linux.ibm.com> References: <20200715094045.381984-1-frankja@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-15_07:2020-07-15, 2020-07-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 suspectscore=1 spamscore=0 impostorscore=0 mlxscore=0 clxscore=1015 malwarescore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007150077 Received-SPF: pass client-ip=148.163.156.1; envelope-from=frankja@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/15 05:41:23 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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, thuth@redhat.com, cohuck@redhat.com, david@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" jump_to_low_kernel() and the functions that it calls will already or 64 bit addressing into the reset psw mask when executing jump_to_IPL_2() after the diag308 subcode 1. The kernel proper is then branched to rather than doing a full PSW change. Signed-off-by: Janosch Frank Acked-by: Thomas Huth --- pc-bios/s390-ccw/dasd-ipl.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c index 0fc879bb8e..e8f2846740 100644 --- a/pc-bios/s390-ccw/dasd-ipl.c +++ b/pc-bios/s390-ccw/dasd-ipl.c @@ -206,7 +206,6 @@ static void run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr) */ void dasd_ipl(SubChannelId schid, uint16_t cutype) { - PSWLegacy *pswl = (PSWLegacy *) 0x00; uint32_t ipl2_addr; /* Construct Read IPL CCW and run it to read IPL1 from boot disk */ @@ -229,7 +228,5 @@ void dasd_ipl(SubChannelId schid, uint16_t cutype) run_ipl2(schid, cutype, ipl2_addr); /* Transfer control to the guest operating system */ - pswl->mask |= PSW_MASK_EAMODE; /* Force z-mode */ - pswl->addr |= PSW_MASK_BAMODE; /* ... */ jump_to_low_kernel(); }