diff --git a/accel/mshv/mshv-all.c b/accel/mshv/mshv-all.c
index 58af674bd9..58d8638c0c 100644
--- a/accel/mshv/mshv-all.c
+++ b/accel/mshv/mshv-all.c
@@ -714,11 +714,23 @@ static const TypeInfo mshv_accel_type = {
     .instance_size = sizeof(MshvState),
 };
 
+/*
+ * MSHV manages secondary processors in the hypervisor. SIPI for x86 and
+ * PSCI for Arm are handled internally. Halted vCPUs must still enter
+ * mshv_cpu_exec() so that MSHV_RUN_VP is called and the hypervisor will
+ * wake APs.
+ */
+static bool mshv_vcpu_thread_is_idle(CPUState *cpu)
+{
+    return false;
+}
+
 static void mshv_accel_ops_class_init(ObjectClass *oc, const void *data)
 {
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
     ops->create_vcpu_thread = mshv_start_vcpu_thread;
+    ops->cpu_thread_is_idle = mshv_vcpu_thread_is_idle;
     ops->synchronize_post_init = mshv_cpu_synchronize_post_init;
     ops->synchronize_post_reset = mshv_cpu_synchronize_post_reset;
     ops->synchronize_state = mshv_cpu_synchronize;