1 files changed, 17 insertions, 4 deletions

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index dfedded9a8..dee48a0043 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -3021,17 +3021,25 @@ static void spapr_machine_init(MachineState *machine)
     qemu_cond_init(&spapr->fwnmi_machine_check_interlock_cond);
 }
 
+#define DEFAULT_KVM_TYPE "auto"
 static int spapr_kvm_type(MachineState *machine, const char *vm_type)
 {
-    if (!vm_type) {
+    /*
+     * The use of g_ascii_strcasecmp() for 'hv' and 'pr' is to
+     * accomodate the 'HV' and 'PV' formats that exists in the
+     * wild. The 'auto' mode is being introduced already as
+     * lower-case, thus we don't need to bother checking for
+     * "AUTO".
+     */
+    if (!vm_type || !strcmp(vm_type, DEFAULT_KVM_TYPE)) {
         return 0;
     }
 
-    if (!strcmp(vm_type, "HV")) {
+    if (!g_ascii_strcasecmp(vm_type, "hv")) {
         return 1;
     }
 
-    if (!strcmp(vm_type, "PR")) {
+    if (!g_ascii_strcasecmp(vm_type, "pr")) {
         return 2;
     }
 
@@ -3270,10 +3278,15 @@ static void spapr_instance_init(Object *obj)
 
     spapr->htab_fd = -1;
     spapr->use_hotplug_event_source = true;
+    spapr->kvm_type = g_strdup(DEFAULT_KVM_TYPE);
     object_property_add_str(obj, "kvm-type",
                             spapr_get_kvm_type, spapr_set_kvm_type);
     object_property_set_description(obj, "kvm-type",
-                                    "Specifies the KVM virtualization mode (HV, PR)");
+                                    "Specifies the KVM virtualization mode (auto,"
+                                    " hv, pr). Defaults to 'auto'. This mode will use"
+                                    " any available KVM module loaded in the host,"
+                                    " where kvm_hv takes precedence if both kvm_hv and"
+                                    " kvm_pr are loaded.");
     object_property_add_bool(obj, "modern-hotplug-events",
                             spapr_get_modern_hotplug_events,
                             spapr_set_modern_hotplug_events);