-/* (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".
+ */
+
+#include <palacios/vmm_time.h>
+#include <palacios/vmm.h>
+#include <palacios/vm_guest.h>
+
+static int handle_cpufreq_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
+ struct vm_time * time_state = &(info->time_state);
+
+ info->vm_regs.rbx = time_state->cpu_freq;
+
+ PrintDebug("Guest request cpu frequency: return %ld\n", (long)info->vm_regs.rbx);
+
+ return 0;
+}
-#include "palacios/vmm_time.h"
-#include "palacios/vmm.h"
void v3_init_time(struct guest_info * info) {
- struct vm_time * time_state = &(info->time_state);
+ struct vm_time * time_state = &(info->time_state);
- time_state->cpu_freq = V3_CPU_KHZ();
+ time_state->cpu_freq = V3_CPU_KHZ();
- time_state->guest_tsc = 0;
- time_state->cached_host_tsc = 0;
- // time_state->pending_cycles = 0;
-
- INIT_LIST_HEAD(&(time_state->timers));
- time_state->num_timers = 0;
+ time_state->pause_time = 0;
+ time_state->last_update = 0;
+ time_state->host_offset = 0;
+
+ INIT_LIST_HEAD(&(time_state->timers));
+ time_state->num_timers = 0;
+
+ v3_register_hypercall(info->vm_info, TIME_CPUFREQ_HCALL, handle_cpufreq_hcall, NULL);
}
+uint64_t v3_get_host_time(struct guest_info * info) {
+ uint64_t tmp;
+ rdtscll(tmp);
+ return tmp;
+}
-int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops, void * private_data) {
- struct vm_timer * timer = NULL;
- timer = (struct vm_timer *)V3_Malloc(sizeof(struct vm_timer));
- V3_ASSERT(timer != NULL);
+uint64_t v3_get_guest_time(struct guest_info * info) {
+ return v3_get_host_time(info) + info->time_state.host_offset;
+}
- timer->ops = ops;
- timer->private_data = private_data;
- list_add(&(timer->timer_link), &(info->time_state.timers));
- info->time_state.num_timers++;
+int v3_start_time(struct guest_info * info) {
+ /* We start running with guest_time == host_time */
+ uint64_t t = v3_get_host_time(info);
+ info->time_state.last_update = t;
+ info->time_state.pause_time = t;
+ return 0;
+}
- return 0;
+int v3_pause_time(struct guest_info * info) {
+ V3_ASSERT(info->time_state.pause_time == 0);
+ info->time_state.pause_time = v3_get_guest_time(info);
+ return 0;
}
+int v3_resume_time(struct guest_info * info) {
+ uint64_t t = v3_get_host_time(info);
+ V3_ASSERT(info->time_state.pause_time != 0);
+#ifdef OPTION_TIME_ADJUST_TSC_OFFSET
+#endif
+ info->time_state.host_offset =
+ (sint64_t)info->time_state.pause_time - (sint64_t)t;
+ info->time_state.pause_time = 0;
+ return 0;
+}
-int v3_remove_timer(struct guest_info * info, struct vm_timer * timer) {
- list_del(&(timer->timer_link));
- info->time_state.num_timers--;
+int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops,
+ void * private_data) {
+ struct vm_timer * timer = NULL;
+ timer = (struct vm_timer *)V3_Malloc(sizeof(struct vm_timer));
+ V3_ASSERT(timer != NULL);
+
+ timer->ops = ops;
+ timer->private_data = private_data;
+
+ list_add(&(timer->timer_link), &(info->time_state.timers));
+ info->time_state.num_timers++;
- V3_Free(timer);
- return 0;
+ return 0;
}
+int v3_remove_timer(struct guest_info * info, struct vm_timer * timer) {
+ list_del(&(timer->timer_link));
+ info->time_state.num_timers--;
-void v3_update_time(struct guest_info * info, ullong_t cycles) {
- struct vm_timer * tmp_timer;
-
- info->time_state.guest_tsc += cycles;
+ V3_Free(timer);
+ return 0;
+}
- list_for_each_entry(tmp_timer, &(info->time_state.timers), timer_link) {
- tmp_timer->ops->update_time(cycles, info->time_state.cpu_freq, tmp_timer->private_data);
- }
-
+void v3_update_timers(struct guest_info * info) {
+ struct vm_timer * tmp_timer;
+ uint64_t old_time = info->time_state.last_update;
+ uint64_t cycles;
+ info->time_state.last_update = v3_get_guest_time(info);
+ cycles = info->time_state.last_update - old_time;
- //info->time_state.pending_cycles = 0;
+ list_for_each_entry(tmp_timer, &(info->time_state.timers), timer_link) {
+ tmp_timer->ops->update_timer(info, cycles, info->time_state.cpu_freq, tmp_timer->private_data);
+ }
}
