* 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".
#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
+ uint32_t host_cpu_freq; // in kHZ
+ uint32_t guest_cpu_freq; // can be lower than host CPU freq!
- // Total number of guest run time cycles
- ullong_t guest_tsc;
+ 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
- // Cache value to help calculate the guest_tsc
- ullong_t cached_host_tsc;
+ uint64_t last_update; // Last time (in monotonic guest time) the
+ // timers were updated
- // The number of cycles pending for notification to the timers
- //ullong_t pending_cycles;
+ 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
+ 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;
};
-
-
-
-struct vm_timer_ops {
- void (*update_time)(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
+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;
struct list_head timer_link;
};
+// Basic functions for handling passage of time in palacios
+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_adjust_time(struct guest_info * core);
+int v3_offset_time(struct guest_info * core, sint64_t offset);
+
+// Basic functions for attaching timers to the passage of time
+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) {
+ uint64_t tmp;
+ rdtscll(tmp);
+ return tmp;
+}
+
+// Returns *monotonic* guest time.
+static inline uint64_t v3_compute_guest_time(struct vm_time *t, uint64_t ht) {
+#ifdef V3_CONFIG_TIME_HIDE_VM_COST
+ V3_ASSERT(t->exit_time);
+ return t->exit_time + t->guest_host_offset;
+#else
+ return v3_get_host_time(t) + t->guest_host_offset;
+#endif
+}
+
+static inline uint64_t v3_get_guest_time(struct vm_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_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_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) {
+ return time_state->guest_host_offset + time_state->tsc_guest_offset;
+}
-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);
+// Functions for handling exits on the TSC when fully virtualizing
+// the timestamp counter.
+#define TSC_MSR 0x10
+#define TSC_AUX_MSR 0xC0000103
-void v3_advance_time(struct guest_info * info);
+int v3_handle_rdtscp(struct guest_info *info);
+int v3_handle_rdtsc(struct guest_info *info);
-void v3_update_time(struct guest_info * info, ullong_t cycles);
-void v3_init_time(struct guest_info * info);
#endif // !__V3VEE__
