[RFC PATCH 4/5] hw/arm/armv7m: Error if trying to set unavailable ARMCPU::vfp property

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Do not ignore impossible configuration requested by the user.
For example, when trying to enable VFP on a Cortex-M33 we now get:

  qemu-system-arm: 'cortex-m33-arm-cpu' does not support VFP

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/armv7m.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 3610f6f4a1..12cdad09f9 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -328,6 +328,9 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
         if (!object_property_set_bool(OBJECT(s->cpu), "vfp", s->vfp, errp)) {
             return;
         }
+    } else if (s->vfp == OPTIONAL_BOOL_TRUE) {
+        error_setg(errp, "'%s' does not support VFP", s->cpu_type);
+        return;
     }
     if (object_property_find(OBJECT(s->cpu), "dsp")) {
         if (!object_property_set_bool(OBJECT(s->cpu), "dsp", s->dsp, errp)) {
-- 
2.41.0