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libvirt/SOURCES/libvirt-qemu-parse-deprecated-props-from-query-cpu-model-expansion-response.patch

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From 5289208127468cd34b5cb6ea7bb45bbeff45d537 Mon Sep 17 00:00:00 2001
Message-ID: <5289208127468cd34b5cb6ea7bb45bbeff45d537.1749113303.git.jdenemar@redhat.com>
From: Collin Walling <walling@linux.ibm.com>
Date: Mon, 16 Dec 2024 18:03:53 -0500
Subject: [PATCH] qemu: parse deprecated-props from query-cpu-model-expansion
response
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>
(cherry picked from commit 45140d293007c1b29f7563bf6ee9640e27769b96)
JIRA: https://issues.redhat.com/browse/RHEL-88716
Conflicts:
tests/qemucapabilitiesdata/caps_9.1.0.s390x.xml
tests/qemucapabilitiesdata/caps_9.2.0.s390x.xml
(dropped the changes to these files since they are of no use in
downstream - upstream testing code changed too much, so it's
not possible to get the related tests to work in downstream)
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
src/qemu/qemu_capabilities.c | 31 +++++++++++++++++++++++++++++++
src/qemu/qemu_monitor.c | 3 +++
src/qemu/qemu_monitor.h | 1 +
src/qemu/qemu_monitor_json.c | 18 ++++++++++++++++++
4 files changed, 53 insertions(+)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index c4f7db55c8..d616273406 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -3766,6 +3766,7 @@ virQEMUCapsLoadHostCPUModelInfo(virQEMUCapsAccel *caps,
{
g_autofree char *migratability = NULL;
xmlNodePtr hostCPUNode;
+ xmlNodePtr deprecated_props;
g_autofree xmlNodePtr *nodes = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
g_autoptr(qemuMonitorCPUModelInfo) hostCPU = NULL;
@@ -3870,6 +3871,24 @@ 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;
}
@@ -4500,6 +4519,18 @@ 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");
}
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 99667fdf2f..8f72fc5bd9 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3487,6 +3487,7 @@ 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);
@@ -3531,6 +3532,8 @@ qemuMonitorCPUModelInfoCopy(const qemuMonitorCPUModelInfo *orig)
}
}
+ copy->deprecated_props = g_strdupv(orig->deprecated_props);
+
return copy;
}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index d00967d84f..5b9ea336ec 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1238,6 +1238,7 @@ struct _qemuMonitorCPUModelInfo {
char *name;
size_t nprops;
qemuMonitorCPUProperty *props;
+ GStrv deprecated_props;
bool migratability;
};
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 487f8028d9..9a3ca3d186 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -5500,6 +5500,7 @@ 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",
@@ -5507,6 +5508,12 @@ 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;
}
@@ -5514,6 +5521,7 @@ 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;
@@ -5521,6 +5529,12 @@ 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;
}
@@ -5584,6 +5598,7 @@ 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;
@@ -5597,6 +5612,7 @@ qemuMonitorJSONGetCPUModelExpansion(qemuMonitor *mon,
if (qemuMonitorJSONParseCPUModelExpansionData(data, fail_no_props,
&cpu_model, &cpu_props,
+ &cpu_deprecated_props,
&cpu_name) < 0)
return -1;
@@ -5615,11 +5631,13 @@ 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);
}
--
2.49.0
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