struct guest_info;
struct vm_time {
- uint32_t cpu_freq; // in kHZ in terms of guest CPU speed
- // which ideally can be different lower than
- // host CPU speed!
+ uint32_t host_cpu_freq; // in kHZ
+ uint32_t guest_cpu_freq; // can be lower than host CPU freq!
- uint32_t time_mult; // Fields for computing monotonic guest time
- uint32_t time_div; // from host (tsc) time
- sint64_t time_offset;
-
- sint64_t tsc_time_offset; // Offset for computing guest TSC value from
- // monotonic guest time
+ sint64_t guest_host_offset;// Offset of monotonic guest time from host time
+ sint64_t tsc_guest_offset; // Offset of guest TSC from monotonic guest time
uint64_t last_update; // Last time (in monotonic guest time) the
// timers were updated
- uint64_t pause_time; // Cache value to help calculate the guest_tsc
+ uint64_t initial_time; // Time when VMM started.
struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP
void v3_init_time(struct guest_info * info);
int v3_start_time(struct guest_info * info);
-int v3_pause_time(struct guest_info * info);
-int v3_resume_time(struct guest_info * info);
+int v3_adjust_time(struct guest_info * info);
// Returns host time
static inline uint64_t v3_get_host_time(struct vm_time *t) {
// Returns *monotonic* guest time.
static inline uint64_t v3_get_guest_time(struct vm_time *t) {
- if (t->pause_time) return t->pause_time;
- else return v3_get_host_time(t) + t->time_offset;
+ return v3_get_host_time(t) + t->guest_host_offset;
}
// 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_time_offset;
+ return v3_get_guest_time(t) + t->tsc_guest_offset;
+}
+
+// Returns offset of guest TSC from host TSC
+static inline sint64_t v3_tsc_host_offset(struct vm_time *time_state) {
+ return time_state->guest_host_offset + time_state->tsc_guest_offset;
}
+
#define TSC_MSR 0x10
#define TSC_AUX_MSR 0xC0000103
