From patchwork Mon Aug 29 11:45:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 663649 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3sN9ZK3F2Gz9snm for ; Mon, 29 Aug 2016 22:14:49 +1000 (AEST) Received: from localhost ([::1]:42999 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beLSh-00083v-Dy for incoming@patchwork.ozlabs.org; Mon, 29 Aug 2016 08:14:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45531) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beL0n-0006E9-DA for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:46:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1beL0d-0001Tr-KF for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:45:56 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:52512 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beL0d-0001Tk-F2 for qemu-devel@nongnu.org; Mon, 29 Aug 2016 07:45:47 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u7TBhpQN064220 for ; Mon, 29 Aug 2016 07:45:47 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0b-001b2d01.pphosted.com with ESMTP id 253reg1xx5-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 29 Aug 2016 07:45:46 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 29 Aug 2016 12:45:42 +0100 X-IBM-Helo: d06dlp01.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id A45F617D8024 for ; Mon, 29 Aug 2016 12:47:30 +0100 (BST) Received: from d06av05.portsmouth.uk.ibm.com (d06av05.portsmouth.uk.ibm.com [9.149.37.229]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u7TBjg2L51576862 for ; Mon, 29 Aug 2016 11:45:42 GMT Received: from d06av05.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u7TBjfbh010005 for ; Mon, 29 Aug 2016 05:45:42 -0600 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-137.boeblingen.de.ibm.com [9.152.224.137]) by d06av05.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u7TBjW4s009268 (version=TLSv1/SSLv3 cipher=AES256-SHA256 bits=256 verify=NO); Mon, 29 Aug 2016 05:45:41 -0600 From: Cornelia Huck To: qemu-devel@nongnu.org Date: Mon, 29 Aug 2016 13:45:28 +0200 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160829114530.10842-1-cornelia.huck@de.ibm.com> References: <20160829114530.10842-1-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16082911-0012-0000-0000-0000044CD107 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16082911-0013-0000-0000-0000152E6FFC Message-Id: <20160829114530.10842-37-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-08-29_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1608290119 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH for-2.8 36/38] s390x/cpumodel: implement QMP interface "query-cpu-model-expansion" X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, agraf@suse.de, David Hildenbrand Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: David Hildenbrand In order to expand CPU models, we create temporary cpus that handle the feature/group parsing. Only CPU feature properties are expanded. When converting the data structure back, we always fall back to the static base CPU model, which is by definition migration-safe. Acked-by: Cornelia Huck Signed-off-by: David Hildenbrand Message-Id: <1472062266-53206-29-git-send-email-dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- qapi-schema.json | 3 +- target-s390x/cpu_models.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 149 insertions(+), 1 deletion(-) diff --git a/qapi-schema.json b/qapi-schema.json index 44cc71e..b06135c 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3143,7 +3143,8 @@ # global properties may affect expansion of CPU models. Using # query-cpu-model-expansion while using these is not advised. # -# Some architectures may not support all expansion types. +# Some architectures may not support all expansion types. s390x supports +# "full" and "static". # # Returns: a CpuModelExpansionInfo. Returns an error if expanding CPU models is # not supported, if the model cannot be expanded, if the model contains diff --git a/target-s390x/cpu_models.c b/target-s390x/cpu_models.c index 7419bd0..ee52ac0 100644 --- a/target-s390x/cpu_models.c +++ b/target-s390x/cpu_models.c @@ -16,6 +16,9 @@ #include "qapi/error.h" #include "qapi/visitor.h" #include "qemu/error-report.h" +#include "qapi/qmp/qerror.h" +#include "qapi/qmp-input-visitor.h" +#include "qapi/qmp/qbool.h" #ifndef CONFIG_USER_ONLY #include "sysemu/arch_init.h" #endif @@ -303,6 +306,150 @@ CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) return list; } + +static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info, + Error **errp) +{ + const QDict *qdict = NULL; + const QDictEntry *e; + Visitor *visitor; + ObjectClass *oc; + S390CPU *cpu; + Object *obj; + + if (info->props) { + qdict = qobject_to_qdict(info->props); + if (!qdict) { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict"); + return; + } + } + + oc = cpu_class_by_name(TYPE_S390_CPU, info->name); + if (!oc) { + error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name); + return; + } + if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) { + error_setg(errp, "The CPU definition '%s' requires KVM", info->name); + return; + } + obj = object_new(object_class_get_name(oc)); + cpu = S390_CPU(obj); + + if (!cpu->model) { + error_setg(errp, "Details about the host CPU model are not available, " + "it cannot be used."); + object_unref(obj); + return; + } + + if (qdict) { + visitor = qmp_input_visitor_new(info->props, true); + visit_start_struct(visitor, NULL, NULL, 0, errp); + if (*errp) { + object_unref(obj); + return; + } + for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) { + object_property_set(obj, visitor, e->key, errp); + if (*errp) { + break; + } + } + if (!*errp) { + visit_check_struct(visitor, errp); + } + visit_end_struct(visitor, NULL); + visit_free(visitor); + if (*errp) { + object_unref(obj); + return; + } + } + + /* copy the model and throw the cpu away */ + memcpy(model, cpu->model, sizeof(*model)); + object_unref(obj); +} + +static void qdict_add_disabled_feat(const char *name, void *opaque) +{ + qdict_put((QDict *) opaque, name, qbool_from_bool(false)); +} + +static void qdict_add_enabled_feat(const char *name, void *opaque) +{ + qdict_put((QDict *) opaque, name, qbool_from_bool(true)); +} + +/* convert S390CPUDef into a static CpuModelInfo */ +static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model, + bool delta_changes) +{ + QDict *qdict = qdict_new(); + S390FeatBitmap bitmap; + + /* always fallback to the static base model */ + info->name = g_strdup_printf("%s-base", model->def->name); + + if (delta_changes) { + /* features deleted from the base feature set */ + bitmap_andnot(bitmap, model->def->base_feat, model->features, + S390_FEAT_MAX); + if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { + s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); + } + + /* features added to the base feature set */ + bitmap_andnot(bitmap, model->features, model->def->base_feat, + S390_FEAT_MAX); + if (!bitmap_empty(bitmap, S390_FEAT_MAX)) { + s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat); + } + } else { + /* expand all features */ + s390_feat_bitmap_to_ascii(model->features, qdict, + qdict_add_enabled_feat); + bitmap_complement(bitmap, model->features, S390_FEAT_MAX); + s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat); + } + + if (!qdict_size(qdict)) { + QDECREF(qdict); + } else { + info->props = QOBJECT(qdict); + info->has_props = true; + } +} + +CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type, + CpuModelInfo *model, + Error **errp) +{ + CpuModelExpansionInfo *expansion_info = NULL; + S390CPUModel s390_model; + bool delta_changes = false; + + /* convert it to our internal representation */ + cpu_model_from_info(&s390_model, model, errp); + if (*errp) { + return NULL; + } + + if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) { + delta_changes = true; + } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) { + error_setg(errp, "The requested expansion type is not supported."); + return NULL; + } + + /* convert it back to a static representation */ + expansion_info = g_malloc0(sizeof(*expansion_info)); + expansion_info->model = g_malloc0(sizeof(*expansion_info->model)); + cpu_info_from_model(expansion_info->model, &s390_model, delta_changes); + return expansion_info; +} #endif static void check_consistency(const S390CPUModel *model)