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qemu: parse deprecated-props from query-cpu-model-expansion response

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query-cpu-model-expansion may report an array of deprecated properties.
This array is optional, and may not be supported for a particular
architecture or reported for a particular CPU model. If the output is
present, then capture it and store in a qemuMonitorCPUModelInfo struct
for later use.

The deprecated features will be retained in qemuCaps->kvm->hostCPU.info
and will be stored in the capabilities cache file under the <hostCPU>
element using the following format:

        <deprecatedFeatures>
                <property name='bpb'/>
                <property name='csske'/>
                <property name='cte'/>
                <property name='te'/>
        </deprecatedFeatures>

At this time the data is only queried, parsed, and cached.  The data
will be utilized in a subsequent patch.

Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Collin Walling 2024-12-16 18:03:53 -05:00 committed by Jiri Denemark
parent 60e407deb5
commit 45140d2930
6 changed files with 65 additions and 0 deletions
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31
src/qemu/qemu_capabilities.c
View File

@ -4019,6 +4019,7 @@ virQEMUCapsLoadHostCPUModelInfo(virQEMUCapsAccel *caps,
const char *typeStr)
{
xmlNodePtr hostCPUNode;
xmlNodePtr deprecated_props;
g_autofree xmlNodePtr *nodes = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
g_autoptr(qemuMonitorCPUModelInfo) hostCPU = NULL;
@ -4111,6 +4112,24 @@ virQEMUCapsLoadHostCPUModelInfo(virQEMUCapsAccel *caps,
}
}
ctxt->node = hostCPUNode;
if ((deprecated_props = virXPathNode("./deprecatedFeatures", ctxt))) {
g_autoptr(GPtrArray) props = virXMLNodeGetSubelementList(deprecated_props, NULL);
hostCPU->deprecated_props = g_new0(char *, props->len + 1);
for (i = 0; i < props->len; i++) {
xmlNodePtr prop = g_ptr_array_index(props, i);
if (!(hostCPU->deprecated_props[i] = virXMLPropString(prop, "name"))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing 'name' attribute for a host CPU model deprecated property in QEMU capabilities cache"));
return -1;
}
}
}
caps->hostCPU.info = g_steal_pointer(&hostCPU);
return 0;
}
@ -4843,6 +4862,18 @@ virQEMUCapsFormatHostCPUModelInfo(virQEMUCapsAccel *caps,
virBufferAddLit(buf, "/>\n");
}
if (model->deprecated_props) {
virBufferAddLit(buf, "<deprecatedFeatures>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < g_strv_length(model->deprecated_props); i++)
virBufferAsprintf(buf, "<property name='%s'/>\n",
model->deprecated_props[i]);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</deprecatedFeatures>\n");
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</hostCPU>\n");
}

3
src/qemu/qemu_monitor.c
View File

@ -3306,6 +3306,7 @@ qemuMonitorCPUModelInfoFree(qemuMonitorCPUModelInfo *model_info)
g_free(model_info->props[i].value.string);
}
g_strfreev(model_info->deprecated_props);
g_free(model_info->props);
g_free(model_info->name);
g_free(model_info);
@ -3350,6 +3351,8 @@ qemuMonitorCPUModelInfoCopy(const qemuMonitorCPUModelInfo *orig)
}
}
copy->deprecated_props = g_strdupv(orig->deprecated_props);
return copy;
}

1
src/qemu/qemu_monitor.h
View File

@ -1150,6 +1150,7 @@ struct _qemuMonitorCPUModelInfo {
char *name;
size_t nprops;
qemuMonitorCPUProperty *props;
GStrv deprecated_props;
bool migratability;
};

18
src/qemu/qemu_monitor_json.c
View File

@ -5105,6 +5105,7 @@ qemuMonitorJSONParseCPUModelExpansionData(virJSONValue *data,
bool fail_no_props,
virJSONValue **cpu_model,
virJSONValue **cpu_props,
virJSONValue **cpu_deprecated_props,
const char **cpu_name)
{
if (qemuMonitorJSONParseCPUModelData(data, "query-cpu-model-expansion",
@ -5112,6 +5113,12 @@ qemuMonitorJSONParseCPUModelExpansionData(virJSONValue *data,
cpu_name) < 0)
return -1;
/*
* Unconditionally check for the deprecated-props array, as
* it is not a guarantee response even if QEMU supports it.
*/
*cpu_deprecated_props = virJSONValueObjectGetArray(data, "deprecated-props");
return 0;
}
@ -5119,6 +5126,7 @@ qemuMonitorJSONParseCPUModelExpansionData(virJSONValue *data,
static int
qemuMonitorJSONParseCPUModelExpansion(const char *cpu_name,
virJSONValue *cpu_props,
virJSONValue *cpu_deprecated_props,
qemuMonitorCPUModelInfo **model_info)
{
g_autoptr(qemuMonitorCPUModelInfo) expanded_model = NULL;
@ -5126,6 +5134,12 @@ qemuMonitorJSONParseCPUModelExpansion(const char *cpu_name,
if (qemuMonitorJSONParseCPUModel(cpu_name, cpu_props, &expanded_model) < 0)
return -1;
if (cpu_deprecated_props &&
virJSONValueArraySize(cpu_deprecated_props) &&
(!(expanded_model->deprecated_props = virJSONValueArrayToStringList(cpu_deprecated_props)))) {
return -1;
}
*model_info = g_steal_pointer(&expanded_model);
return 0;
}
@ -5190,6 +5204,7 @@ qemuMonitorJSONGetCPUModelExpansion(qemuMonitor *mon,
g_autoptr(virJSONValue) fullData = NULL;
virJSONValue *cpu_model;
virJSONValue *cpu_props = NULL;
virJSONValue *cpu_deprecated_props = NULL;
const char *cpu_name = "";
int rc;
@ -5203,6 +5218,7 @@ qemuMonitorJSONGetCPUModelExpansion(qemuMonitor *mon,
if (qemuMonitorJSONParseCPUModelExpansionData(data, fail_no_props,
&cpu_model, &cpu_props,
&cpu_deprecated_props,
&cpu_name) < 0)
return -1;
@ -5221,11 +5237,13 @@ qemuMonitorJSONGetCPUModelExpansion(qemuMonitor *mon,
if (qemuMonitorJSONParseCPUModelExpansionData(fullData, fail_no_props,
&cpu_model, &cpu_props,
&cpu_deprecated_props,
&cpu_name) < 0)
return -1;
}
return qemuMonitorJSONParseCPUModelExpansion(cpu_name, cpu_props,
cpu_deprecated_props,
model_info);
}

6
tests/qemucapabilitiesdata/caps_9.1.0_s390x.xml
View File

@ -193,6 +193,12 @@
<property name='te' type='boolean' value='true'/>
<property name='cmm' type='boolean' value='true'/>
<property name='vxpdeh2' type='boolean' value='true'/>
<deprecatedFeatures>
<property name='bpb'/>
<property name='te'/>
<property name='cte'/>
<property name='csske'/>
</deprecatedFeatures>
</hostCPU>
<cpu type='kvm' name='z13' typename='z13-s390x-cpu' usable='yes'/>
<cpu type='kvm' name='z990.3' typename='z990.3-s390x-cpu' usable='yes'/>

6
tests/qemucapabilitiesdata/caps_9.2.0_s390x.xml
View File

@ -196,6 +196,12 @@
<property name='te' type='boolean' value='true'/>
<property name='cmm' type='boolean' value='true'/>
<property name='vxpdeh2' type='boolean' value='true'/>
<deprecatedFeatures>
<property name='bpb'/>
<property name='te'/>
<property name='cte'/>
<property name='csske'/>
</deprecatedFeatures>
</hostCPU>
<cpu type='kvm' name='z13' typename='z13-s390x-cpu' usable='yes'/>
<cpu type='kvm' name='z990.3' typename='z990.3-s390x-cpu' usable='yes'/>