#include <palacios/vmm_types.h>
#include <palacios/vmm_list.h>
+#include <palacios/vmm_msr.h>
#include <palacios/vmm_util.h>
struct guest_info;
struct vm_time {
- uint32_t cpu_freq; // in kHZ
-
- // Last time (in guest time) the timers were updated
- uint64_t last_update;
+ uint32_t cpu_freq; // in kHZ in terms of guest CPU speed
+ // which ideally can be different lower than
+ // host CPU speed!
+
+ 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
- // Cache value to help calculate the guest_tsc
- uint64_t pause_time;
+ uint64_t last_update; // Last time (in monotonic guest time) the
+ // timers were updated
- // Offset of guest time from host time.
- sint64_t host_offset;
+ uint64_t pause_time; // Cache value to help calculate the guest_tsc
+
+ struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP
- // Installed Timers
+ // Installed Timers slaved off of the guest monotonic TSC
uint_t num_timers;
struct list_head timers;
};
int v3_pause_time(struct guest_info * info);
int v3_resume_time(struct guest_info * info);
+// Returns host time
static inline uint64_t v3_get_host_time(struct vm_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) {
- return v3_get_host_time(t) + t->host_offset;
+ if (t->pause_time) return t->pause_time;
+ else return v3_get_host_time(t) + t->time_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;
}
+
+#define TSC_MSR 0x10
+#define TSC_AUX_MSR 0xC0000103
+
+int v3_handle_rdtscp(struct guest_info *info);
+int v3_handle_rdtsc(struct guest_info *info);
+
#endif // !__V3VEE__
#endif
