[PATCH 3/4] qemu_driver: Implement qemuConnectGetHypervisorCPUModelNames

[Boris Fiuczynski <fiuczy@xxxxxxxxxxxxx>]

From: David Judkovics <djudkovi@xxxxxxxxxxxxx>

This function is utilized by the new virsh hypervisor-cpu-models
command. The CPU models are read directly from the QEMU capabilities
file, which contains a list of all models queried from the hypervisor.

Signed-off-by: David Judkovics <djudkovi@xxxxxxxxxxxxx>
Signed-off-by: Collin Walling <walling@xxxxxxxxxxxxx>
Reviewed-by: Boris Fiuczynski <fiuczy@xxxxxxxxxxxxx>
Signed-off-by: Boris Fiuczynski <fiuczy@xxxxxxxxxxxxx>
---
 src/qemu/qemu_driver.c | 59 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d2eddbd9ae..1a795cebd0 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11948,6 +11948,64 @@ qemuConnectBaselineHypervisorCPU(virConnectPtr conn,
 }
 
 
+static int
+qemuConnectGetHypervisorCPUModelNames(virConnectPtr conn,
+                                      const char *emulator,
+                                      const char *archStr,
+                                      const char *machine,
+                                      const char *virttypeStr,
+                                      char ***models,
+                                      unsigned int flags)
+{
+    virQEMUDriver *driver = conn->privateData;
+    g_autoptr(virQEMUCaps) qemuCaps = NULL;
+    virArch arch;
+    virDomainVirtType virttype;
+    g_autoptr(virDomainCaps) domCaps = NULL;
+    size_t i = 0;
+
+    virDomainCapsCPUModel *customModels = NULL;
+    int customNumModels;
+
+    virCheckFlags(0, -1);
+
+    if (virConnectGetHypervisorCPUModelNamesEnsureACL(conn) < 0)
+        return -1;
+
+    qemuCaps = virQEMUCapsCacheLookupDefault(driver->qemuCapsCache,
+                                             emulator,
+                                             archStr,
+                                             virttypeStr,
+                                             machine,
+                                             &arch,
+                                             &virttype,
+                                             &machine);
+    if (!qemuCaps)
+        return -1;
+
+    if (!(domCaps = virQEMUDriverGetDomainCapabilities(driver,
+                                                       qemuCaps,
+                                                       machine,
+                                                       arch,
+                                                       virttype)))
+        return -1;
+
+    customModels =  domCaps->cpu.custom->models;
+    customNumModels = domCaps->cpu.custom->nmodels;
+
+    if (models) {
+        *models = g_new0(char *, customNumModels);
+        for (i = 0; i < customNumModels; i++) {
+            (*models)[i] = g_strdup(customModels[i].name);
+            VIR_DEBUG("adding models[%zu] = name[%s]",
+                      i, customModels[i].name);
+        }
+    }
+
+    return customNumModels;
+}
+
+
 static int
 qemuDomainGetJobInfoMigrationStats(virDomainObj *vm,
                                    virDomainJobData *jobData)
@@ -20289,6 +20347,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
     .domainSetLifecycleAction = qemuDomainSetLifecycleAction, /* 3.9.0 */
     .connectCompareHypervisorCPU = qemuConnectCompareHypervisorCPU, /* 4.4.0 */
     .connectBaselineHypervisorCPU = qemuConnectBaselineHypervisorCPU, /* 4.4.0 */
+    .connectGetHypervisorCPUModelNames = qemuConnectGetHypervisorCPUModelNames, /* 11.1.0 */
     .nodeGetSEVInfo = qemuNodeGetSEVInfo, /* 4.5.0 */
     .domainGetLaunchSecurityInfo = qemuDomainGetLaunchSecurityInfo, /* 4.5.0 */
     .domainCheckpointCreateXML = qemuDomainCheckpointCreateXML, /* 5.6.0 */
-- 
2.47.0