[PATCH v4 57/65] accel: Always register AccelOpsClass::kick_vcpu_thread() handler

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

In order to dispatch over AccelOpsClass::kick_vcpu_thread(),
we need it always defined, not calling a hidden handler under
the hood. Make AccelOpsClass::kick_vcpu_thread() mandatory.
Register the default cpus_kick_thread() for each accelerator.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 include/system/accel-ops.h | 1 +
 accel/kvm/kvm-accel-ops.c  | 1 +
 accel/qtest/qtest.c        | 1 +
 accel/xen/xen-all.c        | 1 +
 system/cpus.c              | 7 ++-----
 5 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/include/system/accel-ops.h b/include/system/accel-ops.h
index dc8df9ba7dd..e1e6985a27c 100644
--- a/include/system/accel-ops.h
+++ b/include/system/accel-ops.h
@@ -43,6 +43,7 @@ struct AccelOpsClass {
     void *(*cpu_thread_routine)(void *);
     void (*thread_precreate)(CPUState *cpu);
     void (*create_vcpu_thread)(CPUState *cpu);
+    /* kick_vcpu_thread is mandatory. */
     void (*kick_vcpu_thread)(CPUState *cpu);
     bool (*cpu_thread_is_idle)(CPUState *cpu);
 
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index b79c04b6267..a4bcaa87c8d 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -81,6 +81,7 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, const 
void *data)
 
     ops->cpu_thread_routine = kvm_vcpu_thread_fn;
     ops->cpu_thread_is_idle = kvm_vcpu_thread_is_idle;
+    ops->kick_vcpu_thread = cpus_kick_thread;
     ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset;
     ops->synchronize_post_init = kvm_cpu_synchronize_post_init;
     ops->synchronize_state = kvm_cpu_synchronize_state;
diff --git a/accel/qtest/qtest.c b/accel/qtest/qtest.c
index 47fa9e38ce3..8e2379d6e37 100644
--- a/accel/qtest/qtest.c
+++ b/accel/qtest/qtest.c
@@ -66,6 +66,7 @@ static void qtest_accel_ops_class_init(ObjectClass *oc, const 
void *data)
 
     ops->thread_precreate = dummy_thread_precreate;
     ops->cpu_thread_routine = dummy_cpu_thread_routine;
+    ops->kick_vcpu_thread = cpus_kick_thread;
     ops->get_virtual_clock = qtest_get_virtual_clock;
     ops->set_virtual_clock = qtest_set_virtual_clock;
     ops->handle_interrupt = generic_handle_interrupt;
diff --git a/accel/xen/xen-all.c b/accel/xen/xen-all.c
index a51f4c5b2ad..18ae0d82db5 100644
--- a/accel/xen/xen-all.c
+++ b/accel/xen/xen-all.c
@@ -154,6 +154,7 @@ static void xen_accel_ops_class_init(ObjectClass *oc, const 
void *data)
 
     ops->thread_precreate = dummy_thread_precreate;
     ops->cpu_thread_routine = dummy_cpu_thread_routine;
+    ops->kick_vcpu_thread = cpus_kick_thread;
     ops->handle_interrupt = generic_handle_interrupt;
 }
 
diff --git a/system/cpus.c b/system/cpus.c
index efe1a5e211b..6c64ffccbb3 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -486,11 +486,7 @@ void cpus_kick_thread(CPUState *cpu)
 void qemu_cpu_kick(CPUState *cpu)
 {
     qemu_cond_broadcast(cpu->halt_cond);
-    if (cpus_accel->kick_vcpu_thread) {
-        cpus_accel->kick_vcpu_thread(cpu);
-    } else { /* default */
-        cpus_kick_thread(cpu);
-    }
+    cpus_accel->kick_vcpu_thread(cpu);
 }
 
 void qemu_cpu_kick_self(void)
@@ -670,6 +666,7 @@ void cpus_register_accel(const AccelOpsClass *ops)
 {
     assert(ops != NULL);
     assert(ops->create_vcpu_thread || ops->cpu_thread_routine);
+    assert(ops->kick_vcpu_thread);
     assert(ops->handle_interrupt);
     cpus_accel = ops;
 }
-- 
2.49.0