added yield functionality

[palacios.git] / palacios / src / palacios / svm.c

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 6d8cdd2..5fadae1 100644 (file)
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -277,10 +277,14 @@ static int start_svm_guest(struct guest_info *info) {
     //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
     
     info->run_state = VM_RUNNING;
-    
+    rdtscll(info->yield_start_cycle);
+
+
     while (1) {
        ullong_t tmp_tsc;
        
+       // Conditionally yield the CPU if the timeslice has expired
+       v3_yield_cond(info);
 
        /*
          PrintDebug("SVM Entry to CS=%p  rip=%p...\n", 
@@ -289,6 +293,7 @@ static int start_svm_guest(struct guest_info *info) {
        */
 
        // disable global interrupts for vm state transition
+
        v3_clgi();
 
 
@@ -318,6 +323,9 @@ static int start_svm_guest(struct guest_info *info) {
        }
 
      
+       // Conditionally yield the CPU if the timeslice has expired
+       v3_yield_cond(info);
+
        if (v3_handle_svm_exit(info) != 0) {
            vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
            addr_t host_addr;