struct guest_info;
-struct vm_time {
+/* Per-VM time information */
+struct v3_time {
+ uint32_t td_mult;
+};
+
+/* Per-core time information */
+struct vm_core_time {
uint32_t host_cpu_freq; // in kHZ
uint32_t guest_cpu_freq; // can be lower than host CPU freq!
// 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
+ uint64_t pause_time; // Time at which the VM core was paused
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;
+
};
struct v3_timer_ops {
void * private_data;
struct v3_timer_ops * ops;
+ // Need to add accuracy/resolution fields later.
+
struct list_head timer_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);
int v3_start_time(struct guest_info * core);
-int v3_adjust_time(struct guest_info * core);
+int v3_time_enter_vm(struct guest_info * core);
+int v3_time_exit_vm(struct guest_info * core, uint64_t * guest_cycles);
+
int v3_pause_time(struct guest_info * core);
+int v3_resume_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
+int v3_adjust_time(struct guest_info * core);
+
+// 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 to return the different notions of time in Palacios.
-static inline uint64_t v3_get_host_time(struct vm_time *t) {
+static inline uint64_t v3_get_host_time(struct vm_core_time *t) {
uint64_t tmp;
rdtscll(tmp);
return tmp;
}
// Returns *monotonic* guest time.
-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;
- }
+static inline uint64_t v3_compute_guest_time(struct vm_core_time *t, uint64_t ht) {
+ if (t->pause_time)
+ return t->pause_time + t->guest_host_offset;
+ else
+ return ht + t->guest_host_offset;
+}
+
+static inline uint64_t v3_get_guest_time(struct vm_core_time *t) {
+ return v3_compute_guest_time(t, v3_get_host_time(t));
}
// Returns the TSC value seen by the guest
-static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
- return v3_get_guest_time(t) + t->tsc_guest_offset;
+static inline uint64_t v3_compute_guest_tsc(struct vm_core_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_core_time *t) {
+ return v3_compute_guest_tsc(t, v3_get_host_time(t));
}
// Returns offset of guest TSC from host TSC
-static inline sint64_t v3_tsc_host_offset(struct vm_time *time_state) {
+static inline sint64_t v3_tsc_host_offset(struct vm_core_time *time_state) {
return time_state->guest_host_offset + time_state->tsc_guest_offset;
}