* and the University of New Mexico. You can find out more at
* http://www.v3vee.org
*
+ * Copyright (c) 2010, Patrick Bridges <bridges@cs.unm.edu>
* Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
* Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
* Author: Jack Lange <jarusl@cs.northwestern.edu>
+ * Patrick Bridges <bridges@cs.unm.edu>
*
* This is free software. You are permitted to use,
* redistribute, and modify it as specified in the file "V3VEE_LICENSE".
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!
-
+
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 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
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;
};
-struct vm_timer_ops {
+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 vm_timer {
+struct v3_timer {
void * private_data;
- struct vm_timer_ops * ops;
+ struct v3_timer_ops * ops;
+
+ // Need to add accuracy/resolution fields later.
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(struct guest_info * info);
-int v3_start_time(struct guest_info * info);
-int v3_adjust_time(struct guest_info * info);
+void v3_init_time_core(struct guest_info * core);
+int v3_init_time_vm(struct v3_vm_info * vm);
+
+void v3_deinit_time_core(struct guest_info * core);
+void v3_deinit_time_vm(struct v3_vm_info * vm);
+
+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);
-// Basic functions for attaching timers to the passage of time
-int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops, void * private_data);
-int v3_remove_timer(struct guest_info * info, struct vm_timer * timer);
+// 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 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_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) {
- 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;
}