From nobody Tue Feb 10 11:15:12 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1644505735719367.4253050901832; Thu, 10 Feb 2022 07:08:55 -0800 (PST) Received: from localhost ([::1]:43164 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nIB42-0004pe-4C for importer@patchew.org; Thu, 10 Feb 2022 10:08:54 -0500 Received: from eggs.gnu.org ([209.51.188.92]:37372) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI94d-000285-Uq; Thu, 10 Feb 2022 08:01:32 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:62838) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI94D-0004Lm-5B; 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Thu, 10 Feb 2022 13:00:36 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5A9B9A407E; Thu, 10 Feb 2022 13:00:36 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1F5C2A4080; Thu, 10 Feb 2022 13:00:36 +0000 (GMT) Received: from smtp.tlslab.ibm.com (unknown [9.101.4.1]) by d06av23.portsmouth.uk.ibm.com (Postfix) with SMTP; Thu, 10 Feb 2022 13:00:36 +0000 (GMT) Received: from yukon.ibmuc.com (unknown [9.171.74.250]) by smtp.tlslab.ibm.com (Postfix) with ESMTP id 542B222016C; Thu, 10 Feb 2022 14:00:35 +0100 (CET) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org Subject: [PULL 32/42] target/ppc: 7xx: System Call exception cleanup Date: Thu, 10 Feb 2022 13:59:58 +0100 Message-Id: <20220210130008.2599950-33-clg@kaod.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220210130008.2599950-1-clg@kaod.org> References: <20220210130008.2599950-1-clg@kaod.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: fsdWzvX1VymrxwtV0E253QA--Rfly4dD X-Proofpoint-GUID: fsdWzvX1VymrxwtV0E253QA--Rfly4dD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-10_05,2022-02-09_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 clxscore=1034 mlxscore=0 bulkscore=0 malwarescore=0 suspectscore=0 adultscore=0 mlxlogscore=725 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202100071 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: softfail client-ip=148.163.156.1; envelope-from=clg@kaod.org; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_SOFTFAIL=0.665, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: Peter Maydell , Richard Henderson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Fabiano Rosas Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1644505737551100001 Content-Type: text/plain; charset="utf-8" From: Fabiano Rosas Remove the BookE code and add a comment explaining why we need to keep hypercall support even though this CPU does not have a hypervisor mode. Signed-off-by: Fabiano Rosas Message-Id: <20220204173430.1457358-8-farosas@linux.ibm.com> Signed-off-by: C=C3=A9dric Le Goater --- target/ppc/excp_helper.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 8f810f7de508..14a4eea9d6f2 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -747,7 +747,7 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp) CPUPPCState *env =3D &cpu->env; int excp_model =3D env->excp_model; target_ulong msr, new_msr, vector; - int srr0, srr1, lev =3D -1; + int srr0, srr1; =20 if (excp <=3D POWERPC_EXCP_NONE || excp >=3D POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); @@ -860,9 +860,10 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp) } break; case POWERPC_EXCP_SYSCALL: /* System call exception = */ - lev =3D env->error_code; + { + int lev =3D env->error_code; =20 - if ((lev =3D=3D 1) && cpu->vhyp) { + if (lev =3D=3D 1 && cpu->vhyp) { dump_hcall(env); } else { dump_syscall(env); @@ -874,17 +875,21 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int exc= p) */ env->nip +=3D 4; =20 - /* "PAPR mode" built-in hypercall emulation */ - if ((lev =3D=3D 1) && cpu->vhyp) { + /* + * The Virtual Open Firmware (VOF) relies on the 'sc 1' + * instruction to communicate with QEMU. The pegasos2 machine + * uses VOF and the 7xx CPUs, so although the 7xx don't have + * HV mode, we need to keep hypercall support. + */ + if (lev =3D=3D 1 && cpu->vhyp) { PPCVirtualHypervisorClass *vhc =3D PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); vhc->hypercall(cpu->vhyp, cpu); return; } - if (lev =3D=3D 1) { - new_msr |=3D (target_ulong)MSR_HVB; - } + break; + } case POWERPC_EXCP_FPU: /* Floating-point unavailable exception = */ case POWERPC_EXCP_DECR: /* Decrementer exception = */ break; --=20 2.34.1