-/* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
-/* (c) 2008, The V3VEE Project <http://www.v3vee.org> */
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * 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>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
#ifndef __VMM_TIME_H
#define __VMM_TIME_H
+#ifdef __V3VEE__
#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
-
- // Total number of guest run time cycles
- ullong_t guest_tsc;
-
- // Cache value to help calculate the guest_tsc
- ullong_t cached_host_tsc;
-
- // The number of cycles pending for notification to the timers
- //ullong_t pending_cycles;
-
- // Installed Timers
- uint_t num_timers;
- struct list_head timers;
+ 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
+
+ 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
+
+ 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;
};
-#ifdef __V3VEE__
-struct vm_timer_ops {
- void (*update_time)(ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
+struct vm_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 {
- void * private_data;
- struct vm_timer_ops * ops;
+ void * private_data;
+ struct vm_timer_ops * ops;
- struct list_head timer_link;
+ struct list_head timer_link;
};
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);
-
-
-void v3_update_time(struct guest_info * info, ullong_t cycles);
-
-#endif // !__V3VEE__
+void v3_update_timers(struct guest_info * info);
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);
+
+// 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) {
+ 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
