[Qemu-ppc] [PATCH v6 1/2] spapr: helper functions to get valid host fields

[Maxiwell S. Garcia]

The pseries options 'host-serial' and 'host-model' accepts
'none', 'passthrough', or <string> content. The helper
functions in this commit return a valid host field based on
user options.

Signed-off-by: Maxiwell S. Garcia <address@hidden>
---
 hw/ppc/spapr.c         | 48 +++++++++++++++++++++++-------------------
 include/hw/ppc/spapr.h |  4 ++++
 2 files changed, 30 insertions(+), 22 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 6c16d6cfaf..3e2d5fe438 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1211,6 +1211,24 @@ static void spapr_dt_chosen(SpaprMachineState *spapr, 
void *fdt)
     g_free(bootlist);
 }
 
+#define SPAPR_GET_VALID_HOST(attr)                            \
+char *spapr_get_valid_host_##attr(SpaprMachineState *spapr)   \
+{                                                             \
+    char *buf = NULL;                                         \
+    if (spapr->host_##attr &&                                 \
+        !g_str_equal(spapr->host_##attr, "none")) {           \
+        if (g_str_equal(spapr->host_##attr, "passthrough")) { \
+            kvmppc_get_host_##attr(&buf);                     \
+        } else {                                              \
+            buf = g_strdup(spapr->host_##attr);               \
+        }                                                     \
+    }                                                         \
+    return buf;                                               \
+}
+
+SPAPR_GET_VALID_HOST(serial);
+SPAPR_GET_VALID_HOST(model);
+
 static void spapr_dt_hypervisor(SpaprMachineState *spapr, void *fdt)
 {
     /* The /hypervisor node isn't in PAPR - this is a hack to allow PR
@@ -1256,30 +1274,16 @@ static void *spapr_build_fdt(SpaprMachineState *spapr)
      * Add info to guest to indentify which host is it being run on
      * and what is the uuid of the guest
      */
-    if (spapr->host_model && !g_str_equal(spapr->host_model, "none")) {
-        if (g_str_equal(spapr->host_model, "passthrough")) {
-            /* -M host-model=passthrough */
-            if (kvmppc_get_host_model(&buf)) {
-                _FDT(fdt_setprop_string(fdt, 0, "host-model", buf));
-                g_free(buf);
-            }
-        } else {
-            /* -M host-model=<user-string> */
-            _FDT(fdt_setprop_string(fdt, 0, "host-model", spapr->host_model));
-        }
+    buf = spapr_get_valid_host_model(spapr);
+    if (buf) {
+        _FDT(fdt_setprop_string(fdt, 0, "host-model", buf));
+        g_free(buf);
     }
 
-    if (spapr->host_serial && !g_str_equal(spapr->host_serial, "none")) {
-        if (g_str_equal(spapr->host_serial, "passthrough")) {
-            /* -M host-serial=passthrough */
-            if (kvmppc_get_host_serial(&buf)) {
-                _FDT(fdt_setprop_string(fdt, 0, "host-serial", buf));
-                g_free(buf);
-            }
-        } else {
-            /* -M host-serial=<user-string> */
-            _FDT(fdt_setprop_string(fdt, 0, "host-serial", 
spapr->host_serial));
-        }
+    buf = spapr_get_valid_host_serial(spapr);
+    if (buf) {
+        _FDT(fdt_setprop_string(fdt, 0, "host-serial", buf));
+        g_free(buf);
     }
 
     buf = qemu_uuid_unparse_strdup(&qemu_uuid);
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 2b4c05a2ec..5e0a1b2a8a 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -856,6 +856,10 @@ int spapr_caps_post_migration(SpaprMachineState *spapr);
 
 void spapr_check_pagesize(SpaprMachineState *spapr, hwaddr pagesize,
                           Error **errp);
+
+char *spapr_get_valid_host_serial(SpaprMachineState *spapr);
+char *spapr_get_valid_host_model(SpaprMachineState *spapr);
+
 /*
  * XIVE definitions
  */
-- 
2.20.1