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Tue, 6 Oct 2020 09:42:58 +0000 (GMT) From: Janosch Frank To: qemu-devel@nongnu.org Subject: [PATCH v4 4/4] pc-bios: s390x: Go into disabled wait when encountering a PGM exception Date: Tue, 6 Oct 2020 05:42:49 -0400 Message-Id: <20201006094249.50640-5-frankja@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201006094249.50640-1-frankja@linux.ibm.com> References: <20201006094249.50640-1-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=2020-10-06_03:2020-10-06, 2020-10-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 suspectscore=1 malwarescore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 mlxlogscore=926 priorityscore=1501 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010060058 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 = 2020/10/06 04:55:29 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Let's setup a PGM PSW, so we won't load 0s when a program exception happens. Instead we'll load a disabled wait PSW. Signed-off-by: Janosch Frank Reviewed-by: Christian Borntraeger Reviewed-by: Thomas Huth --- pc-bios/s390-ccw/start.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S index ce519300a1..4d5ad21653 100644 --- a/pc-bios/s390-ccw/start.S +++ b/pc-bios/s390-ccw/start.S @@ -34,7 +34,10 @@ remainder: larl %r2,memsetxc ex %r3,0(%r2) done: - j main /* And call C */ + /* set up a pgm exception disabled wait psw */ + larl %r2, disabled_wait_psw + mvc 0x01d0(16), 0(%r2) + j main /* And call C */ memsetxc: xc 0(1,%r1),0(%r1)