qcow2-bitmap: Fix uint64_t left-shift overflow

[thirdparty/qemu.git] / cpus-common.c

diff --git a/cpus-common.c b/cpus-common.c
index 59f751ecf917a90cf7f98fe1eb8f892dbc376e7a..eaf590cb38708590ac6f1895aa64d8a1c7aefb58 100644 (file)
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -20,7 +20,7 @@
 #include "qemu/osdep.h"
 #include "qemu/main-loop.h"
 #include "exec/cpu-common.h"
-#include "qom/cpu.h"
+#include "hw/core/cpu.h"
 #include "sysemu/cpus.h"
 
 static QemuMutex qemu_cpu_list_lock;
@@ -69,12 +69,6 @@ static int cpu_get_free_index(void)
     return cpu_index;
 }
 
-static void finish_safe_work(CPUState *cpu)
-{
-    cpu_exec_start(cpu);
-    cpu_exec_end(cpu);
-}
-
 void cpu_list_add(CPUState *cpu)
 {
     qemu_mutex_lock(&qemu_cpu_list_lock);
@@ -84,10 +78,8 @@ void cpu_list_add(CPUState *cpu)
     } else {
         assert(!cpu_index_auto_assigned);
     }
-    QTAILQ_INSERT_TAIL(&cpus, cpu, node);
+    QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node);
     qemu_mutex_unlock(&qemu_cpu_list_lock);
-
-    finish_safe_work(cpu);
 }
 
 void cpu_list_remove(CPUState *cpu)
@@ -99,9 +91,9 @@ void cpu_list_remove(CPUState *cpu)
         return;
     }
 
-    assert(!(cpu_index_auto_assigned && cpu != QTAILQ_LAST(&cpus, CPUTailQ)));
+    assert(!(cpu_index_auto_assigned && cpu != QTAILQ_LAST(&cpus)));
 
-    QTAILQ_REMOVE(&cpus, cpu, node);
+    QTAILQ_REMOVE_RCU(&cpus, cpu, node);
     cpu->cpu_index = UNASSIGNED_CPU_INDEX;
     qemu_mutex_unlock(&qemu_cpu_list_lock);
 }
@@ -208,11 +200,15 @@ void start_exclusive(void)
      * section until end_exclusive resets pending_cpus to 0.
      */
     qemu_mutex_unlock(&qemu_cpu_list_lock);
+
+    current_cpu->in_exclusive_context = true;
 }
 
 /* Finish an exclusive operation.  */
 void end_exclusive(void)
 {
+    current_cpu->in_exclusive_context = false;
+
     qemu_mutex_lock(&qemu_cpu_list_lock);
     atomic_set(&pending_cpus, 0);
     qemu_cond_broadcast(&exclusive_resume);