plugins: add migration blocker
If the plugin in controlling time there is some state that might be
missing from the plugin tracking it. Migration is unlikely to work in
this case so lets put a migration blocker in to let the user know if
they try.
Suggested-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240620152220.2192768-10-alex.bennee@linaro.org>
diff --git a/plugins/api.c b/plugins/api.c
index 4431a0e..2ff13d0 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -47,6 +47,8 @@
#include "disas/disas.h"
#include "plugin.h"
#ifndef CONFIG_USER_ONLY
+#include "qapi/error.h"
+#include "migration/blocker.h"
#include "exec/ram_addr.h"
#include "qemu/plugin-memory.h"
#include "hw/boards.h"
@@ -589,11 +591,19 @@
* Time control
*/
static bool has_control;
+#ifdef CONFIG_SOFTMMU
+static Error *migration_blocker;
+#endif
const void *qemu_plugin_request_time_control(void)
{
if (!has_control) {
has_control = true;
+#ifdef CONFIG_SOFTMMU
+ error_setg(&migration_blocker,
+ "TCG plugin time control does not support migration");
+ migrate_add_blocker(&migration_blocker, NULL);
+#endif
return &has_control;
}
return NULL;
