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Mon, 24 Jul 2023 08:20:42 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EC55820043; Mon, 24 Jul 2023 08:20:41 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 62FA020040; Mon, 24 Jul 2023 08:20:41 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.171.11.212]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 24 Jul 2023 08:20:41 +0000 (GMT) From: Ilya Leoshkevich To: Richard Henderson , David Hildenbrand , Thomas Huth Cc: qemu-s390x@nongnu.org, qemu-devel@nongnu.org, Ilya Leoshkevich , qemu-stable@nongnu.org Subject: [PATCH v4 02/14] target/s390x: Fix CLM with M3=0 Date: Mon, 24 Jul 2023 10:15:55 +0200 Message-ID: <20230724082032.66864-3-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230724082032.66864-1-iii@linux.ibm.com> References: <20230724082032.66864-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Aa7F-IKbz9uE_euipZUBdIjGgtqeYiDB X-Proofpoint-ORIG-GUID: wAqOTG6eZXmioJXUjpYD8oTVtJdKLmqV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-24_06,2023-07-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 impostorscore=0 phishscore=0 spamscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307240071 Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=-1, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_HELO_TEMPERROR=0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org When the mask is zero, access exceptions should still be recognized for 1 byte at the second-operand address. CC should be set to 0. Cc: qemu-stable@nongnu.org Fixes: defb0e3157af ("s390x: Implement opcode helpers") Reviewed-by: David Hildenbrand Reviewed-by: Richard Henderson Signed-off-by: Ilya Leoshkevich --- target/s390x/tcg/mem_helper.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c index f417fb1183c..84103251b97 100644 --- a/target/s390x/tcg/mem_helper.c +++ b/target/s390x/tcg/mem_helper.c @@ -667,6 +667,11 @@ uint32_t HELPER(clm)(CPUS390XState *env, uint32_t r1, uint32_t mask, HELPER_LOG("%s: r1 0x%x mask 0x%x addr 0x%" PRIx64 "\n", __func__, r1, mask, addr); + if (!mask) { + /* Recognize access exceptions for the first byte */ + probe_read(env, addr, 1, cpu_mmu_index(env, false), ra); + } + while (mask) { if (mask & 8) { uint8_t d = cpu_ldub_data_ra(env, addr, ra);