[RFC PATCH 13/19] accel: Introduce AccelOpsClass::cpu_thread_routine handler

[Philippe Mathieu-Daudé]

In order to have a generic function creating threads,
introduce the thread_precreate() and cpu_thread_routine()
handlers.

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 include/system/accel-ops.h |  2 ++
 accel/accel-common.c       | 16 +++++++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/include/system/accel-ops.h b/include/system/accel-ops.h
index 44b37592d02..a6535a07343 100644
--- a/include/system/accel-ops.h
+++ b/include/system/accel-ops.h
@@ -37,6 +37,8 @@ struct AccelOpsClass {
     bool (*cpus_are_resettable)(void);
     void (*cpu_reset_hold)(CPUState *cpu);
 
+    void *(*cpu_thread_routine)(void *);
+    void (*thread_precreate)(CPUState *cpu);
     void (*create_vcpu_thread)(CPUState *cpu); /* MANDATORY NON-NULL */
     void (*kick_vcpu_thread)(CPUState *cpu);
     bool (*cpu_thread_is_idle)(CPUState *cpu);
diff --git a/accel/accel-common.c b/accel/accel-common.c
index 6bd4ef47c2c..39eb2b2c1be 100644
--- a/accel/accel-common.c
+++ b/accel/accel-common.c
@@ -11,6 +11,7 @@
 #include "qemu/accel.h"
 #include "qemu/target-info.h"
 #include "system/accel-ops.h"
+#include "system/cpus.h"
 #include "accel/accel-cpu.h"
 #include "accel-internal.h"
 
@@ -104,7 +105,20 @@ void accel_create_vcpu_thread(AccelState *accel, CPUState 
*cpu)
     if (ac->ops->create_vcpu_thread != NULL) {
         ac->ops->create_vcpu_thread(cpu);
     } else {
-        g_assert_not_reached();
+        char thread_name[VCPU_THREAD_NAME_SIZE];
+
+        assert(ac->name);
+        assert(ac->ops->cpu_thread_routine);
+
+        if (ac->ops->thread_precreate) {
+            ac->ops->thread_precreate(cpu);
+        }
+
+        snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/%s",
+                 cpu->cpu_index, ac->name);
+        qemu_thread_create(cpu->thread, thread_name,
+                           ac->ops->cpu_thread_routine,
+                           cpu, QEMU_THREAD_JOINABLE);
     }
 }
 
-- 
2.49.0