nvdimm: make persistence option symbolic

Replace the "nvdimm-cap" option which took numeric arguments such as "2"
with a more user friendly "nvdimm-persistence" option which takes symbolic
arguments "cpu" or "mem-ctrl".

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 17 insertions, 18 deletions

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f3befe6721..5bba9dcf5a 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -2181,31 +2181,30 @@ static void pc_machine_set_nvdimm(Object *obj, bool value, Error **errp)
     pcms->acpi_nvdimm_state.is_enabled = value;
 }
 
-static void pc_machine_get_nvdimm_capabilities(Object *obj, Visitor *v,
-                                               const char *name, void *opaque,
-                                               Error **errp)
+static char *pc_machine_get_nvdimm_persistence(Object *obj, Error **errp)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
-    uint32_t value = pcms->acpi_nvdimm_state.capabilities;
 
-    visit_type_uint32(v, name, &value, errp);
+    return g_strdup(pcms->acpi_nvdimm_state.persistence_string);
 }
 
-static void pc_machine_set_nvdimm_capabilities(Object *obj, Visitor *v,
-                                               const char *name, void *opaque,
+static void pc_machine_set_nvdimm_persistence(Object *obj, const char *value,
                                                Error **errp)
 {
     PCMachineState *pcms = PC_MACHINE(obj);
-    Error *error = NULL;
-    uint32_t value;
-
-    visit_type_uint32(v, name, &value, &error);
-    if (error) {
-        error_propagate(errp, error);
-        return;
+    AcpiNVDIMMState *nvdimm_state = &pcms->acpi_nvdimm_state;
+
+    if (strcmp(value, "cpu") == 0)
+        nvdimm_state->persistence = 3;
+    else if (strcmp(value, "mem-ctrl") == 0)
+        nvdimm_state->persistence = 2;
+    else {
+        error_report("-machine nvdimm-persistence=%s: unsupported option", value);
+        exit(EXIT_FAILURE);
     }
 
-    pcms->acpi_nvdimm_state.capabilities = value;
+    g_free(nvdimm_state->persistence_string);
+    nvdimm_state->persistence_string = g_strdup(value);
 }
 
 static bool pc_machine_get_smbus(Object *obj, Error **errp)
@@ -2421,9 +2420,9 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     object_class_property_add_bool(oc, PC_MACHINE_NVDIMM,
         pc_machine_get_nvdimm, pc_machine_set_nvdimm, &error_abort);
 
-    object_class_property_add(oc, PC_MACHINE_NVDIMM_CAP, "uint32",
-        pc_machine_get_nvdimm_capabilities,
-        pc_machine_set_nvdimm_capabilities, NULL, NULL, &error_abort);
+    object_class_property_add_str(oc, PC_MACHINE_NVDIMM_PERSIST,
+        pc_machine_get_nvdimm_persistence,
+        pc_machine_set_nvdimm_persistence, &error_abort);
 
     object_class_property_add_bool(oc, PC_MACHINE_SMBUS,
         pc_machine_get_smbus, pc_machine_set_smbus, &error_abort);