diff --git a/tcg/tcg.c b/tcg/tcg.c
index 16b2d0e..5475d49 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -736,6 +736,15 @@
 #endif
 }
 
+static void alloc_tcg_plugin_context(TCGContext *s)
+{
+#ifdef CONFIG_PLUGIN
+    s->plugin_tb = g_new0(struct qemu_plugin_tb, 1);
+    s->plugin_tb->insns =
+        g_ptr_array_new_with_free_func(qemu_plugin_insn_cleanup_fn);
+#endif
+}
+
 /*
  * All TCG threads except the parent (i.e. the one that called tcg_context_init
  * and registered the target's TCG globals) must register with this function
@@ -780,6 +789,10 @@
     g_assert(n < ms->smp.max_cpus);
     atomic_set(&tcg_ctxs[n], s);
 
+    if (n > 0) {
+        alloc_tcg_plugin_context(s);
+    }
+
     tcg_ctx = s;
     qemu_mutex_lock(&region.lock);
     err = tcg_region_initial_alloc__locked(tcg_ctx);
@@ -976,6 +989,8 @@
         indirect_reg_alloc_order[i] = tcg_target_reg_alloc_order[i];
     }
 
+    alloc_tcg_plugin_context(s);
+
     tcg_ctx = s;
     /*
      * In user-mode we simply share the init context among threads, since we
@@ -1681,6 +1696,13 @@
     flags = info->flags;
     sizemask = info->sizemask;
 
+#ifdef CONFIG_PLUGIN
+    /* detect non-plugin helpers */
+    if (tcg_ctx->plugin_insn && unlikely(strncmp(info->name, "plugin_", 7))) {
+        tcg_ctx->plugin_insn->calls_helpers = true;
+    }
+#endif
+
 #if defined(__sparc__) && !defined(__arch64__) \
     && !defined(CONFIG_TCG_INTERPRETER)
     /* We have 64-bit values in one register, but need to pass as two