From: Roberto Campesato <render@metalabs.org>

diff --git a/linux-user/main.c b/linux-user/main.c

index 0cdaf30d34..553faf1309 100644

--- a/linux-user/main.c

+++ b/linux-user/main.c

@@ -357,6 +357,10 @@ static void handle_arg_uname(const char *arg)

 static void handle_arg_cpu(const char *arg)

 {

+    if (cpu_model != NULL) {

+        free(cpu_model);

+        cpu_model = NULL;

+    }

     cpu_model = strdup(arg);

     if (cpu_model == NULL || is_help_option(cpu_model)) {

         list_cpus();

@@ -717,7 +721,16 @@ int main(int argc, char **argv, char **envp)

         }

     }

+    /* This is a pretty disgusting hack, in place to get a default

+       CPU that has x86_64-v2 support, required for emulating a

+       CPU that CentOS 9 is happy to run on (via binfmt_misc).  */

+#if defined(TARGET_X86_64) && !defined(__x86_64__)

+    cpu_model = strdup("Nehalem-v1");

+#elif defined(TARGET_AARCH64) && !defined(__aarch64__)

+    cpu_model = strdup("cortex-a72");

+#else

     cpu_model = NULL;

+#endif

     qemu_add_opts(&qemu_trace_opts);

     qemu_plugin_add_opts();