* 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 {
+ 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
-
- uint64_t last_update; // Last time (in monotonic guest time) the
+
+ // 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 guest cycles) the
// timers were updated
- uint64_t initial_time; // Time when VMM started.
-
+ 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;
+
};
-struct vm_timer_ops {
+#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 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;
};
+
+
// 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_advance_time(struct guest_info * core, uint64_t * guest_cycles);
-// 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 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_get_guest_time(struct vm_core_time *t) {
+ return t->guest_cycles;
}
-// Returns the TSC value seen by the guest
-static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
+static inline uint64_t v3_get_guest_tsc(struct vm_core_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_time *time_state) {
- return time_state->guest_host_offset + time_state->tsc_guest_offset;
+static inline sint64_t v3_tsc_host_offset(struct vm_core_time *time_state) {
+ 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
