[libvirt PATCH 4/5] qemu: probe for "-cpu max" support

[Daniel P. Berrangé <berrange@xxxxxxxxxx>]

This is a special CPU model similar to "-cpu host", so won't use our
normal CPU model detection logic.

Signed-off-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/qemu/qemu_capabilities.c | 11 +++++++++++
 src/qemu/qemu_capabilities.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index d0378f94bc..ecfb313d0a 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -614,6 +614,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
 
               /* 390 */
               "vhost-user-blk",
+              "cpu-max",
     );
 
 
@@ -2984,12 +2985,22 @@ virQEMUCapsProbeQMPCPUDefinitions(virQEMUCapsPtr qemuCaps,
                                   virQEMUCapsAccelPtr accel,
                                   qemuMonitorPtr mon)
 {
+    qemuMonitorCPUDefsPtr defs = accel->cpuModels;
+    size_t i;
+
     if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_DEFINITIONS))
         return 0;
 
     if (virQEMUCapsFetchCPUDefinitions(mon, qemuCaps->arch, &accel->cpuModels) < 0)
         return -1;
 
+    for (i = 0; i < defs->ncpus; i++) {
+        if (STREQ_NULLABLE(defs->cpus[i].name, "max")) {
+            virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_MAX);
+            break;
+        }
+    }
+
     return 0;
 }
 
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 8cb5673042..79d443adfb 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -594,6 +594,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
 
     /* 390 */
     QEMU_CAPS_DEVICE_VHOST_USER_BLK, /* -device vhost-user-blk */
+    QEMU_CAPS_CPU_MAX, /* -cpu max */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
-- 
2.29.2