[PATCH v3 44/52] qemu: Introduce virQEMUCapsGetMachineDefaultCPU

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx>
---

Notes:
    Version 2:
    - fix crash with CPUs without type
    
    Version 3:
    - no change

 src/qemu/qemu_capabilities.c | 32 ++++++++++++++++++++++++++++++++
 src/qemu/qemu_capabilities.h |  3 +++
 2 files changed, 35 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index dc2723d025..9829860d4d 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -2195,6 +2195,38 @@ virQEMUCapsGetMachineHotplugCpus(virQEMUCapsPtr qemuCaps,
 }
 
 
+const char *
+virQEMUCapsGetMachineDefaultCPU(virQEMUCapsPtr qemuCaps,
+                                const char *name,
+                                virDomainVirtType type)
+{
+    virQEMUCapsAccelPtr accel = virQEMUCapsGetAccel(qemuCaps, type);
+    qemuMonitorCPUDefsPtr defs = accel->cpuModels;
+    const char *cpuType = NULL;
+    size_t i;
+
+    if (!name || !defs)
+        return NULL;
+
+    for (i = 0; i < accel->nmachineTypes; i++) {
+        if (STREQ(accel->machineTypes[i].name, name)) {
+            cpuType = accel->machineTypes[i].defaultCPU;
+            break;
+        }
+    }
+
+    if (!cpuType)
+        return NULL;
+
+    for (i = 0; i < defs->ncpus; i++) {
+        if (STREQ_NULLABLE(defs->cpus[i].type, cpuType))
+            return defs->cpus[i].name;
+    }
+
+    return NULL;
+}
+
+
 /**
  * virQEMUCapsSetGICCapabilities:
  * @qemuCaps: QEMU capabilities
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index bc43b99579..f063d95048 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -609,6 +609,9 @@ int virQEMUCapsGetMachineMaxCpus(virQEMUCapsPtr qemuCaps,
 bool virQEMUCapsGetMachineHotplugCpus(virQEMUCapsPtr qemuCaps,
                                       virDomainVirtType virtType,
                                       const char *name);
+const char *virQEMUCapsGetMachineDefaultCPU(virQEMUCapsPtr qemuCaps,
+                                            const char *name,
+                                            virDomainVirtType type);
 
 void virQEMUCapsFilterByMachineType(virQEMUCapsPtr qemuCaps,
                                     virDomainVirtType virtType,
-- 
2.23.0

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