[Qemu-devel] [PATCH 07/14] cpu: introduce CPUClass.resume() method

[Igor Mammedov <imammedo@redhat.com>]

... and call it if defined from CPUClass.realize() if CPU was hotplugged

by default leave .resume() unset (i.e. NULL) and override it for softmmu
in qemu_init_vcpu() if it's still unset.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 cpus.c            | 15 ++++++++++++---
 include/qom/cpu.h |  2 ++
 qom/cpu.c         |  5 +++++
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/cpus.c b/cpus.c
index 9b9a32f..6b793c5 100644
--- a/cpus.c
+++ b/cpus.c
@@ -973,6 +973,13 @@ void pause_all_vcpus(void)
     }
 }
 
+static void resume_vcpu(CPUState *cpu)
+{
+    cpu->stop = false;
+    cpu->stopped = false;
+    qemu_cpu_kick(cpu);
+}
+
 void resume_all_vcpus(void)
 {
     CPUArchState *penv = first_cpu;
@@ -980,9 +987,7 @@ void resume_all_vcpus(void)
     qemu_clock_enable(vm_clock, true);
     while (penv) {
         CPUState *pcpu = ENV_GET_CPU(penv);
-        pcpu->stop = false;
-        pcpu->stopped = false;
-        qemu_cpu_kick(pcpu);
+        resume_vcpu(pcpu);
         penv = penv->next_cpu;
     }
 }
@@ -1042,7 +1047,11 @@ void qemu_init_vcpu(void *_env)
 {
     CPUArchState *env = _env;
     CPUState *cpu = ENV_GET_CPU(env);
+    CPUClass *klass = CPU_GET_CLASS(cpu);
 
+    if (klass->resume == NULL) {
+        klass->resume = resume_vcpu;
+    }
     cpu->nr_cores = smp_cores;
     cpu->nr_threads = smp_threads;
     cpu->stopped = true;
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 3664a1b..6d6eb7a 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -45,6 +45,7 @@ typedef struct CPUState CPUState;
  * instantiatable CPU type.
  * @reset: Callback to reset the #CPUState to its initial state.
  * @do_interrupt: Callback for interrupt handling.
+ * @resume: Callback for putting CPU in runable state
  * @vmsd: State description for migration.
  *
  * Represents a CPU family or model.
@@ -58,6 +59,7 @@ typedef struct CPUClass {
 
     void (*reset)(CPUState *cpu);
     void (*do_interrupt)(CPUState *cpu);
+    void (*resume)(CPUState *cpu);
 
     const struct VMStateDescription *vmsd;
 } CPUClass;
diff --git a/qom/cpu.c b/qom/cpu.c
index 0c76712..c062e00 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -58,8 +58,13 @@ static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 
 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 {
+    CPUClass *klass = CPU_GET_CLASS(dev);
+
     if (dev->hotplugged) {
         cpu_synchronize_post_init(CPU(dev));
+        if (klass->resume != NULL) {
+            klass->resume(CPU(dev));
+        }
     }
 }
 
-- 
1.8.1.4