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Wed, 24 Apr 2024 21:57:09 +0000 (GMT) Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0237458052; Wed, 24 Apr 2024 21:57:09 +0000 (GMT) Received: from li-d664314c-3171-11b2-a85c-fa8047ef35bd.pok.ibm.com (unknown [9.12.68.85]) by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 24 Apr 2024 21:57:08 +0000 (GMT) From: Collin Walling To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: thuth@redhat.com, david@redhat.com, wangyanan55@huawei.com, philmd@linaro.org, marcel.apfelbaum@gmail.com, eduardo@habkost.net, armbru@redhat.com, Collin Walling Subject: [PATCH v3 1/2] target/s390x: report deprecated-props in cpu-model-expansion reply Date: Wed, 24 Apr 2024 17:56:32 -0400 Message-ID: <20240424215633.48906-2-walling@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240424215633.48906-1-walling@linux.ibm.com> References: <20240424215633.48906-1-walling@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: BlSuWXB5aTmnabh589I_BODB2l0nzgdh X-Proofpoint-ORIG-GUID: OUkLzrt85j16EiuXcx8Jb9fsGN6QQMoI X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-24_19,2024-04-24_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 mlxscore=0 spamscore=0 priorityscore=1501 malwarescore=0 mlxlogscore=999 suspectscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404240114 Received-SPF: pass client-ip=148.163.158.5; envelope-from=walling@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Retain a list of deprecated features disjoint from any particular CPU model. A query-cpu-model-expansion reply will now provide a list of properties (i.e. features) that are flagged as deprecated. Example: { "return": { "model": { "name": "z14.2-base", "deprecated-props": [ "bpb", "csske" ], "props": { "pfmfi": false, "exrl": true, ...a lot more props... "skey": false, "vxpdeh2": false } } } } It is recommended that s390 guests operate with these features explicitly disabled to ensure compatability with future hardware. Signed-off-by: Collin Walling --- qapi/machine-target.json | 5 ++++- target/s390x/cpu_features.c | 14 ++++++++++++++ target/s390x/cpu_features.h | 1 + target/s390x/cpu_models_sysemu.c | 6 ++++++ 4 files changed, 25 insertions(+), 1 deletion(-) diff --git a/qapi/machine-target.json b/qapi/machine-target.json index 29e695aa06..3799a60e3d 100644 --- a/qapi/machine-target.json +++ b/qapi/machine-target.json @@ -20,11 +20,14 @@ # # @props: a dictionary of QOM properties to be applied # +# @deprecated-props: a list of QOM properties that are flagged as deprecated +# # Since: 2.8 ## { 'struct': 'CpuModelInfo', 'data': { 'name': 'str', - '*props': 'any' } } + '*props': 'any', + '*deprecated-props': ['str'] } } ## # @CpuModelExpansionType: diff --git a/target/s390x/cpu_features.c b/target/s390x/cpu_features.c index d28eb65845..efafc9711c 100644 --- a/target/s390x/cpu_features.c +++ b/target/s390x/cpu_features.c @@ -212,6 +212,20 @@ void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque, }; } +void s390_get_deprecated_features(S390FeatBitmap features) +{ + static const int feats[] = { + /* CSSKE is deprecated on newer generations */ + S390_FEAT_CONDITIONAL_SSKE, + S390_FEAT_BPB, + }; + int i; + + for (i = 0; i < ARRAY_SIZE(feats); i++) { + set_bit(feats[i], features); + } +} + #define FEAT_GROUP_INIT(_name, _group, _desc) \ { \ .name = _name, \ diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h index a9bd68a2e1..661a8cd6db 100644 --- a/target/s390x/cpu_features.h +++ b/target/s390x/cpu_features.h @@ -69,6 +69,7 @@ void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type, uint8_t *data); void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque, void (*fn)(const char *name, void *opaque)); +void s390_get_deprecated_features(S390FeatBitmap features); /* Definition of a CPU feature group */ typedef struct { diff --git a/target/s390x/cpu_models_sysemu.c b/target/s390x/cpu_models_sysemu.c index 2d99218069..307e3885f4 100644 --- a/target/s390x/cpu_models_sysemu.c +++ b/target/s390x/cpu_models_sysemu.c @@ -206,6 +206,12 @@ static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model, } else { info->props = QOBJECT(qdict); } + + bitmap_zero(bitmap, S390_FEAT_MAX); + s390_get_deprecated_features(bitmap); + s390_feat_bitmap_to_ascii(bitmap, &info->deprecated_props, + list_add_feat); + info->has_deprecated_props = !!info->deprecated_props; } CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,