X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm.c;h=1203427da7881cc8a5a96d2245512375e51ed8a5;hb=b90e3373d07b92968b28aef77f4dc68e6a264f12;hp=a20399babca460e7ec59de36bf4cf38ba1dd6d71;hpb=37c18b2c2335a41c68c2f0b779fd2b7d51ab216d;p=palacios.git

diff --git a/palacios/src/palacios/vmm.c b/palacios/src/palacios/vmm.c
index a20399b..1203427 100644
--- a/palacios/src/palacios/vmm.c
+++ b/palacios/src/palacios/vmm.c
@@ -28,8 +28,8 @@
 #include <palacios/vmm_lowlevel.h>
 
 
-/* These should be the only global variables in Palacios */
-/* They are architecture specific variables */
+
+
 v3_cpu_arch_t v3_cpu_type;
 struct v3_os_hooks * os_hooks = NULL;
 
@@ -101,3 +101,32 @@ v3_cpu_mode_t v3_get_host_cpu_mode() {
 
 #endif 
 
+
+#define V3_Yield(addr)					\
+    do {						\
+	extern struct v3_os_hooks * os_hooks;		\
+	if ((os_hooks) && (os_hooks)->yield_cpu) {	\
+	    (os_hooks)->yield_cpu();			\
+	}						\
+    } while (0)						\
+
+
+void v3_yield_cond(struct guest_info * info) {
+    uint64_t cur_cycle;
+    rdtscll(cur_cycle);
+
+    if (cur_cycle > (info->yield_start_cycle + info->yield_cycle_period)) {
+
+	/*
+	  PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n", 
+	  (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period);
+	*/
+	V3_Yield();
+	rdtscll(info->yield_start_cycle);
+    }
+}
+
+void v3_yield(struct guest_info * info) {
+    V3_Yield();
+    rdtscll(info->yield_start_cycle);
+}