-/* (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) 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".
+ */
#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;
+/* 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)
- // Cache value to help calculate the guest_tsc
- ullong_t cached_host_tsc;
+/* 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!
- // The number of cycles pending for notification to the timers
- //ullong_t pending_cycles;
+ // Multipliers for TSC speed and performance speed
+ uint32_t clock_ratio_num, clock_ratio_denom;
+ uint32_t ipc_ratio_num, ipc_ratio_denom;
- // Installed Timers
- uint_t num_timers;
- struct list_head timers;
-};
+ 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
-#ifdef __V3VEE__
+ uint64_t initial_host_time;// Host time when VMM started.
+ struct v3_msr tsc_aux; // Auxilliary MSR for RDTSCP
-struct vm_timer_ops {
- void (*update_time)(ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
+ int flags;
+
+ // Installed Timers slaved off of the guest monotonic TSC
+ uint_t num_timers;
+ struct list_head timers;
};
-struct vm_timer {
- void * private_data;
- struct vm_timer_ops * ops;
+#define VM_TIME_SLAVE_HOST (1 << 0)
+#define VM_TIME_TSC_PASSTHROUGH (1 << 1)
+#define VM_TIME_TRAP_RDTSC (1 << 2)
- struct list_head timer_link;
+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 v3_timer {
+ void * private_data;
+ struct v3_timer_ops * ops;
+ // Need to add accuracy/resolution fields later.
+ 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);
+// 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);
-#endif // !__V3VEE__
+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 - 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);
-void v3_init_time(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;
+ rdtscll(tmp);
+ return tmp;
+}
+// Returns *monotonic* guest time.
+static inline uint64_t v3_get_guest_time(struct vm_core_time *t) {
+ return t->guest_cycles;
+}
+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_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
+// the timestamp counter.
+#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
