struct guest_info;
+
/* Per-VM time information */
struct v3_time {
- uint32_t td_mult;
+ int flags;
+ uint32_t td_num, td_denom;
};
+#define V3_TIME_SLAVE_HOST (1 << 0)
+#define V3_TIME_TSC_PASSTHROUGH (1 << 1)
/* 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!
- 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
+ // Multipliers for TSC speed and performance speed
+ uint32_t clock_ratio_num, clock_ratio_denom;
+ uint32_t ipc_ratio_num, ipc_ratio_denom;
+
+ uint64_t guest_cycles;
+ sint64_t tsc_guest_offset; // Offset of guest TSC from guest cycles
- uint64_t last_update; // Last time (in monotonic guest time) the
+ uint64_t last_update; // Last time (in guest cycles) the
// timers were updated
- 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
+ uint64_t initial_host_time;// Host time when VMM started.
struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP
+ int flags;
+
// 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;
};
+#define VM_TIME_SLAVE_HOST (1 << 0)
+#define VM_TIME_TSC_PASSTHROUGH (1 << 1)
+#define VM_TIME_TRAP_RDTSC (1 << 2)
+
struct v3_timer_ops {
void (*update_timer)(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
void (*advance_timer)(struct guest_info * info, void * private_data);
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_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_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);
+int v3_advance_time(struct guest_info * core, uint64_t * guest_cycles);
// Basic functions for attaching timers to the passage of time - these timers
// should eventually specify their accuracy and resolution.
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_core_time *t) {
uint64_t tmp;
}
// Returns *monotonic* guest time.
-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_compute_guest_tsc(struct vm_core_time *t, uint64_t ht) {
- return v3_compute_guest_time(t, ht) + t->tsc_guest_offset;
+ return t->guest_cycles;
}
static inline uint64_t v3_get_guest_tsc(struct vm_core_time *t) {
- return v3_compute_guest_tsc(t, v3_get_host_time(t));
+ 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_core_time *time_state) {
- return time_state->guest_host_offset + time_state->tsc_guest_offset;
+ uint64_t host_time = v3_get_host_time(time_state);
+ return (sint64_t)v3_get_guest_tsc(time_state) - (sint64_t)host_time;
}
// Functions for handling exits on the TSC when fully virtualizing
