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!
uint64_t initial_time; // Time when VMM started.
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
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_resume_time(struct guest_info * core);
int v3_offset_time(struct guest_info * core, sint64_t offset);
+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_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) {
+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_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 ht + t->guest_host_offset;
-#endif
+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_time *t) {
+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_compute_guest_tsc(struct vm_time *t, uint64_t ht) {
+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_time *t) {
+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;
}