From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Tue, 22 Apr 2025 09:42:19 +0000 (+0200)
Subject: hw/arm/virt: Check accelerator availability at runtime
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9f5791334ed83b0b25c17d7cac29d583848ecad6;p=thirdparty%2Fqemu.git

hw/arm/virt: Check accelerator availability at runtime

It is not possible to call accelerator runtime helpers
when QOM types are registered, because they depend on
the parsing of the '-accel FOO' command line option,
which happens after main().

Now than get_valid_cpu_types() is called after
accelerator initializations, it is safe to call the
accelerator helpers:

  main
   + configure_accelerators
   + qmp_x_exit_preconfig
     + qemu_init_board
       + machine_run_board_init
         + is_cpu_type_supported

Replace compile-time check on CONFIG_{ACCEL} by
runtime check on {accel}_enabled() helpers.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20251021210840.60112-1-philmd@linaro.org>
---

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index e19da6fd90..d380975446 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3260,7 +3260,7 @@ static GPtrArray *virt_get_valid_cpu_types(const MachineState *ms)
 {
     GPtrArray *vct = g_ptr_array_new_with_free_func(g_free);
 
-#ifdef CONFIG_TCG
+    if (tcg_enabled()) {
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a7")));
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a15")));
 #ifdef TARGET_AARCH64
@@ -3274,13 +3274,13 @@ static GPtrArray *virt_get_valid_cpu_types(const MachineState *ms)
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("neoverse-v1")));
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("neoverse-n2")));
 #endif /* TARGET_AARCH64 */
-#endif /* CONFIG_TCG */
+    }
 #ifdef TARGET_AARCH64
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a53")));
         g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a57")));
-#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
+        if (kvm_enabled() || hvf_enabled()) {
             g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("host")));
-#endif /* CONFIG_KVM || CONFIG_HVF */
+        }
 #endif /* TARGET_AARCH64 */
     g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("max")));