X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=25eed0233573e9c678b4781b3b5021aff23a9ffd;hb=635a17215f8c66fa9ef54a7bb2cef6c709ddf523;hp=6513e3037620647e38a6fb5564e73f1740218feb;hpb=89034c39d340e3f6b24a8288ceeb506ddbdf7057;p=palacios.releases.git

diff --git a/palacios/include/palacios/vmm_time.h b/palacios/include/palacios/vmm_time.h
index 6513e30..25eed02 100644
--- a/palacios/include/palacios/vmm_time.h
+++ b/palacios/include/palacios/vmm_time.h
@@ -42,12 +42,18 @@ struct vm_time {
                                // timers were updated
 
     uint64_t initial_time;     // Time when VMM started. 
-    uint64_t pause_time;       // Host time when VM entered and paused.
+    uint64_t enter_time;       // Host time the guest was last entered
+    uint64_t exit_time;        // Host time the the VM was exited to
     struct v3_msr tsc_aux;     // Auxilliary MSR for RDTSCP
 
     // Installed Timers slaved off of the guest monotonic TSC
     uint_t num_timers;
     struct list_head timers;
+
+    // Installed timeout handlers, and the time (in monotonic guest time) of hte 
+    // next timeout.
+    uint64_t next_timeout; 
+    struct list_head timeout_hooks;
 };
 
 struct v3_timer_ops {
@@ -59,9 +65,19 @@ struct v3_timer {
     void * private_data;
     struct v3_timer_ops * ops;
 
+    // Need to add accuracy/resolution fields later.
+
     struct list_head timer_link;
 };
 
+typedef void (*v3_timeout_callback_t)(struct guest_info * info, void * priv_data);
+struct v3_timeout_hook {
+    void * private_data;
+    v3_timeout_callback_t callback;
+    
+    struct list_head hook_link;
+};
+
 // Basic functions for handling passage of time in palacios
 void v3_init_time_core(struct guest_info * core);
 int v3_init_time_vm(struct v3_vm_info * vm);
@@ -71,16 +87,27 @@ void v3_deinit_time_vm(struct v3_vm_info * vm);
 
 int v3_start_time(struct guest_info * core);
 
+int v3_time_enter_vm(struct guest_info * core);
+int v3_time_exit_vm(struct guest_info * core);
+
 int v3_adjust_time(struct guest_info * core);
-int v3_pause_time(struct guest_info * core);
 int v3_offset_time(struct guest_info * core, sint64_t offset);
-int v3_restart_time(struct guest_info * core);
 
-// Basic functions for attaching timers to the passage of time
+// Basic functions for attaching timers to the passage of time - these timers 
+// should eventually specify their accuracy and resolution.
 struct v3_timer * v3_add_timer(struct guest_info * info, struct v3_timer_ops * ops, void * private_data);
 int v3_remove_timer(struct guest_info * info, struct v3_timer * timer);
 void v3_update_timers(struct guest_info * info);
 
+// Functions for handling one-shot timeouts in Palacios. Note that only one
+// timeout is every currently outstanding (the soonest scheduled one!), and that
+// all hooks are called on any timeout. If a hook gets called before the desired
+// timeout time, that hook should reschedule its own timeout if desired.
+struct v3_timeout_hook * v3_add_timeout_hook(struct guest_info * info, v3_timeout_callback_t callback, void * priv_data);
+int v3_remove_timeout_hook(struct guest_info * info, struct v3_timeout_hook * hook);
+int v3_schedule_timeout(struct guest_info * info, ullong_t cycles);
+int v3_check_timeout(struct guest_info * info);
+
 // Functions to return the different notions of time in Palacios.
 static inline uint64_t v3_get_host_time(struct vm_time *t) {
     uint64_t tmp;
@@ -89,17 +116,26 @@ static inline uint64_t v3_get_host_time(struct vm_time *t) {
 }
 
 // Returns *monotonic* guest time.
+static inline uint64_t v3_compute_guest_time(struct vm_time *t, uint64_t ht) {
+#ifdef V3_CONFIG_TIME_HIDE_VM_COST
+    V3_ASSERT(t->exit_time);
+    return t->exit_time + t->guest_host_offset;
+#else
+    return v3_get_host_time(t) + t->guest_host_offset;
+#endif
+}
+
 static inline uint64_t v3_get_guest_time(struct vm_time *t) {
-    if (t->pause_time) {
-        return t->pause_time + t->guest_host_offset;
-    } else {
-        return v3_get_host_time(t) + t->guest_host_offset;
-    }
+    return v3_compute_guest_time(t, v3_get_host_time(t));
 }
 
 // Returns the TSC value seen by the guest
+static inline uint64_t v3_compute_guest_tsc(struct vm_time *t, uint64_t ht) {
+    return v3_compute_guest_time(t, ht) + t->tsc_guest_offset;
+}
+
 static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
-    return v3_get_guest_time(t) + t->tsc_guest_offset;
+    return v3_compute_guest_tsc(t, v3_get_host_time(t));
 }
 
 // Returns offset of guest TSC from host TSC