target-microblaze: Fallback to our latest CPU version

Today, when running QEMU in linux-user or with boards that don't
select a specific CPU version, we treat it as an invalid version
and log a message.

Instead, if no specific version was selected, fallback to our
latest CPU version.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index 4dc1404..06476f6 100644 (file)
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -72,6 +72,9 @@ static const struct {
     {NULL, 0},
 };
 
+/* If no specific version gets selected, default to the following.  */
+#define DEFAULT_CPU_VERSION "10.0"
+
 static void mb_cpu_set_pc(CPUState *cs, vaddr value)
 {
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
@@ -141,6 +144,7 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
     CPUMBState *env = &cpu->env;
     uint8_t version_code = 0;
+    const char *version;
     int i = 0;
     Error *local_err = NULL;
 
@@ -162,8 +166,9 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
                         | PVR2_FPU_EXC_MASK \
                         | 0;
 
-    for (i = 0; mb_cpu_lookup[i].name && cpu->cfg.version; i++) {
-        if (strcmp(mb_cpu_lookup[i].name, cpu->cfg.version) == 0) {
+    version = cpu->cfg.version ? cpu->cfg.version : DEFAULT_CPU_VERSION;
+    for (i = 0; mb_cpu_lookup[i].name && version; i++) {
+        if (strcmp(mb_cpu_lookup[i].name, version) == 0) {
             version_code = mb_cpu_lookup[i].version_id;
             break;
         }