[Qemu-devel] [PATCH 01/15] exec: add qemu_for_each_cpu

[Igor Mammedov <imammedo@redhat.com>]

wrapper will help to remove open-coded loops.

pathc icludes random example of how it could be used.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
Note:
  Will be used by ACPI table generation and cpu_exists()

v2:
 * s/signal_cpu_creation()/tcg_signal_cpu_creation()/
---
 cpus.c            |   13 +++++++------
 exec.c            |   10 ++++++++++
 include/qom/cpu.h |    8 ++++++++
 3 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/cpus.c b/cpus.c
index 1d88761..a2d92c7 100644
--- a/cpus.c
+++ b/cpus.c
@@ -812,6 +812,12 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
 
 static void tcg_exec_all(void);
 
+static void tcg_signal_cpu_creation(CPUState *cpu, void *data)
+{
+    cpu->thread_id = qemu_get_thread_id();
+    cpu->created = true;
+}
+
 static void *qemu_tcg_cpu_thread_fn(void *arg)
 {
     CPUState *cpu = arg;
@@ -820,13 +826,8 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
     qemu_tcg_init_cpu_signals();
     qemu_thread_get_self(cpu->thread);
 
-    /* signal CPU creation */
     qemu_mutex_lock(&qemu_global_mutex);
-    for (env = first_cpu; env != NULL; env = env->next_cpu) {
-        cpu = ENV_GET_CPU(env);
-        cpu->thread_id = qemu_get_thread_id();
-        cpu->created = true;
-    }
+    qemu_for_each_cpu(tcg_signal_cpu_creation, NULL);
     qemu_cond_signal(&qemu_cpu_cond);
 
     /* wait for initial kick-off after machine start */
diff --git a/exec.c b/exec.c
index fa1e0c3..19725db 100644
--- a/exec.c
+++ b/exec.c
@@ -265,6 +265,16 @@ CPUState *qemu_get_cpu(int index)
     return env ? cpu : NULL;
 }
 
+void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data)
+{
+    CPUArchState *env = first_cpu;
+
+    while (env) {
+        func(ENV_GET_CPU(env), data);
+        env = env->next_cpu;
+    }
+}
+
 void cpu_exec_init(CPUArchState *env)
 {
     CPUState *cpu = ENV_GET_CPU(env);
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 1b4de17..f64727e 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -215,6 +215,14 @@ bool cpu_is_stopped(CPUState *cpu);
  */
 void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
 
+/** qemu_for_each_cpu:
+ * @func: The function to be executed.
+ * @data: Data to pass to the function.
+ *
+ * Executes @func on all CPUs
+ */
+void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data);
+
 /**
  * qemu_get_cpu:
  * @index: The CPUState@cpu_index value of the CPU to obtain.
-- 
1.7.1