[PATCH v5 2/4] nvdimm: add uuid property to nvdimm

[Shivaprasad G Bhat]

For ppc64, PAPR requires the nvdimm device to have UUID property
set in the device tree. Add an option to get it from the user.

Signed-off-by: Shivaprasad G Bhat <sb...@linux.ibm.com>
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
---
 hw/mem/nvdimm.c         |   40 ++++++++++++++++++++++++++++++++++++++++
 include/hw/mem/nvdimm.h |    7 +++++++
 2 files changed, 47 insertions(+)

diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index 39f1426d1f..8e426d24bb 100644
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -69,11 +69,51 @@ out:
     error_propagate(errp, local_err);
 }
 
+static void nvdimm_get_uuid(Object *obj, Visitor *v, const char *name,
+                                  void *opaque, Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(obj);
+    char *value = NULL;
+
+    value = qemu_uuid_unparse_strdup(&nvdimm->uuid);
+
+    visit_type_str(v, name, &value, errp);
+    g_free(value);
+}
+
+
+static void nvdimm_set_uuid(Object *obj, Visitor *v, const char *name,
+                                  void *opaque, Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(obj);
+    Error *local_err = NULL;
+    char *value;
+
+    visit_type_str(v, name, &value, &local_err);
+    if (local_err) {
+        goto out;
+    }
+
+    if (qemu_uuid_parse(value, &nvdimm->uuid) != 0) {
+        error_setg(errp, "Property '%s.%s' has invalid value",
+                   object_get_typename(obj), name);
+        goto out;
+    }
+    g_free(value);
+
+out:
+    error_propagate(errp, local_err);
+}
+
+
 static void nvdimm_init(Object *obj)
 {
     object_property_add(obj, NVDIMM_LABEL_SIZE_PROP, "int",
                         nvdimm_get_label_size, nvdimm_set_label_size, NULL,
                         NULL, NULL);
+
+    object_property_add(obj, NVDIMM_UUID_PROP, "QemuUUID", nvdimm_get_uuid,
+                        nvdimm_set_uuid, NULL, NULL, NULL);
 }
 
 static void nvdimm_finalize(Object *obj)
diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h
index 523a9b3d4a..4807ca615b 100644
--- a/include/hw/mem/nvdimm.h
+++ b/include/hw/mem/nvdimm.h
@@ -25,6 +25,7 @@
 
 #include "hw/mem/pc-dimm.h"
 #include "hw/acpi/bios-linker-loader.h"
+#include "qemu/uuid.h"
 
 #define NVDIMM_DEBUG 0
 #define nvdimm_debug(fmt, ...)                                \
@@ -49,6 +50,7 @@
                                                TYPE_NVDIMM)
 
 #define NVDIMM_LABEL_SIZE_PROP "label-size"
+#define NVDIMM_UUID_PROP       "uuid"
 #define NVDIMM_UNARMED_PROP    "unarmed"
 
 struct NVDIMMDevice {
@@ -83,6 +85,11 @@ struct NVDIMMDevice {
      * the guest write persistence.
      */
     bool unarmed;
+
+    /*
+     * The PPC64 - spapr requires each nvdimm device have a uuid.
+     */
+    QemuUUID uuid;
 };
 typedef struct NVDIMMDevice NVDIMMDevice;