From: Jack Lange <jacklange@cs.pitt.edu>
Date: Thu, 26 Jul 2012 20:34:40 +0000 (-0400)
Subject: added runstate checks in barrier to allow locking operations to proceed when VM is... 
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=3848474666fa030031e14b9fdea4caf886e034ca;p=palacios.git

added runstate checks in barrier to allow locking operations to proceed when VM is not running
---

diff --git a/palacios/src/palacios/vmm_barrier.c b/palacios/src/palacios/vmm_barrier.c
index e6f1221..19b2db2 100644
--- a/palacios/src/palacios/vmm_barrier.c
+++ b/palacios/src/palacios/vmm_barrier.c
@@ -141,6 +141,12 @@ int v3_wait_for_barrier(struct v3_vm_info * vm_info, struct guest_info * local_c
 int v3_raise_barrier(struct v3_vm_info * vm_info, struct guest_info * local_core) {
     int ret = 0;
 
+
+    if ((vm_info->run_state != VM_RUNNING) || 
+	(vm_info->run_state != VM_SIMULATING)) {
+	return 0;
+    }
+
     ret = v3_raise_barrier_nowait(vm_info, local_core);
 
     if (ret != 0) {
@@ -162,6 +168,12 @@ int v3_raise_barrier(struct v3_vm_info * vm_info, struct guest_info * local_core
 int v3_lower_barrier(struct v3_vm_info * vm_info) {
     struct v3_barrier * barrier = &(vm_info->barrier);
 
+    
+    if ((vm_info->run_state != VM_RUNNING) || 
+	(vm_info->run_state != VM_SIMULATING)) {
+	return 0;
+    }
+
     // Clear the active flag, so cores won't wait 
     barrier->active = 0;