12:48 p.m.
Spinup QEMU instance and complete QMP query-cpu-model-baseline exchanges
to determine CPUModel Baseline.
query-cpu-model-baseline only compares two CPUModels so multiple
exchanges are needed to evaluate more than two CPUModels.
---
src/qemu/qemu_capabilities.c | 132 +++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_capabilities.h | 9 +++
2 files changed, 141 insertions(+)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 097985cbe7..9ffbf91a90 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -5122,3 +5122,135 @@ virQEMUCapsSetMicrocodeVersion(virQEMUCapsPtr qemuCaps,
{
qemuCaps->microcodeVersion = microcodeVersion;
}
+
+
+/* in:
+ * <host>
+ * <cpu>
+ * <arch>s390x</arch>
+ * <model>z13-base</model>
+ * <feature name='xxx'/>
+ * ...
+ * <feature name='yyy'/>
+ * </cpu>
+ * <cpu>
+ * <arch>s390x</arch>
+ * <model>z114-base</model>
+ * <feature name='xxx'/>
+ * ...
+ * <feature name='yyy'/>
+ * </cpu>
+ * </host>
+ *
+ * out:
+ * <cpu match='exact'>
+ * <model>z13-base</model>
+ * <feature policy='require' name='xxx'/>
+ * <feature policy='require' name='yyy'/>
+ * </cpu>
+ *
+ * (ret==0) && (baseline.len == 0) if baseline not supported by QEMU
+ */
+int
+virQEMUCapsQMPBaselineCPUModel(char *exec,
+ const char *libDir,
+ uid_t runUid,
+ gid_t runGid,
+ const char **xmlCPUs,
+ unsigned int ncpus,
+ bool migratable,
+ virBufferPtr baseline)
+{
+ qemuMonitorCPUModelInfoPtr model_baseline = NULL;
+ qemuMonitorCPUModelInfoPtr new_model_baseline = NULL;
+ qemuMonitorCPUModelInfoPtr model_b = NULL;
+ virQEMUCapsInitQMPCommandPtr cmd = NULL;
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+ bool forceTCG = false;
+ int ret = -1;
+ size_t i;
+
+ VIR_DEBUG("ncpus=%i, migratable=%i", ncpus, migratable);
+
+ if (!(cmd = virQEMUCapsSpinUpQemu(exec, libDir, runUid, runGid, forceTCG)))
+ goto cleanup;
+
+ if (!(cmd->mon)) {
+ /* Not connected to QEMU (monitor) */
+ VIR_DEBUG("QEMU failed to initialize error=%s",
virGetLastErrorMessage());
+ goto cleanup;
+ }
+
+ /* QEMU requires qmp_capabilities exchange first */
+ if (qemuMonitorSetCapabilities(cmd->mon) < 0) {
+ VIR_DEBUG("Failed to set monitor capabilities %s",
+ virGetLastErrorMessage());
+ goto cleanup;
+ }
+
+ if (!xmlCPUs && ncpus != 0) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("nonzero ncpus doesn't match with NULL
xmlCPUs"));
+ goto cleanup;
+ }
+
+ if (ncpus < 2) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s", _("baseline < 2 CPUs
"));
+ goto cleanup;
+ }
+
+ if (virQEMUCapsLoadCPUModelInfoFromXMLString(xmlCPUs[0], "//cpu",
+ &model_baseline) < 0)
+ goto cleanup;
+
+ VIR_DEBUG("xmlCPUs[0] = %s", xmlCPUs[0]);
+
+ for (i = 1; i < ncpus; i++) {
+
+ VIR_DEBUG("xmlCPUs[%lu] = %s", i, xmlCPUs[i]);
+
+ if (virQEMUCapsLoadCPUModelInfoFromXMLString(xmlCPUs[i], "//cpu",
&model_b) < 0)
+ goto cleanup;
+
+ if (!model_baseline || !model_b) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s", _("xmlCPU without
content"));
+ goto cleanup;
+ }
+
+ if (qemuMonitorGetCPUModelBaseline(cmd->mon, model_baseline,
+ model_b, &new_model_baseline) < 0)
+ goto cleanup;
+
+ if (!new_model_baseline) {
+ VIR_DEBUG("QEMU didn't support baseline");
+ ret = 0;
+ goto cleanup;
+ }
+
+ qemuMonitorCPUModelInfoFree(model_baseline);
+ qemuMonitorCPUModelInfoFree(model_b);
+
+ model_b = NULL;
+
+ model_baseline = new_model_baseline;
+ }
+
+ VIR_DEBUG("model_baseline->name = %s",
NULLSTR(model_baseline->name));
+
+ virQEMUCapsCPUModelInfoToXML(model_baseline, &buf);
+
+ if (virBufferUse(&buf))
+ virBufferAddBuffer(baseline, &buf);
+
+ ret = 0;
+
+ cleanup:
+ virQEMUCapsInitQMPCommandFree(cmd);
+
+ qemuMonitorCPUModelInfoFree(model_baseline);
+ qemuMonitorCPUModelInfoFree(model_b);
+
+ VIR_DEBUG("baseline = %s", virBufferCurrentContent(baseline));
+
+ return ret;
+}
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 8da18a8063..2d3e8ce2ad 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -536,6 +536,15 @@ int virQEMUCapsGetMachineTypesCaps(virQEMUCapsPtr qemuCaps,
void virQEMUCapsFilterByMachineType(virQEMUCapsPtr qemuCaps,
const char *machineType);
+int virQEMUCapsQMPBaselineCPUModel(char *exec,
+ const char *libDir,
+ uid_t runUid,
+ gid_t runGid,
+ const char **xmlCPUs,
+ unsigned int ncpus,
+ bool migratable,
+ virBufferPtr baseline);
+
virFileCachePtr virQEMUCapsCacheNew(const char *libDir,
const char *cacheDir,
uid_t uid,
--
2.14.1