palacios/src/palacios/vmm_time.c

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <palacios/vmm_time.h>
  21 #include <palacios/vmm.h>
  22 #include <palacios/vm_guest.h>
  23
  24 static int handle_cpufreq_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
  25     struct vm_time * time_state = &(info->time_state);
  26
  27     info->vm_regs.rbx = time_state->cpu_freq;
  28
  29     PrintDebug("Guest request cpu frequency: return %ld\n", (long)info->vm_regs.rbx);
  30
  31     return 0;
  32 }
  33
  34
  35
  36 void v3_init_time(struct guest_info * info) {
  37     struct vm_time * time_state = &(info->time_state);
  38
  39     time_state->cpu_freq = V3_CPU_KHZ();
  40
  41     time_state->guest_tsc = 0;
  42     time_state->cached_host_tsc = 0;
  43     // time_state->pending_cycles = 0;
  44
  45     INIT_LIST_HEAD(&(time_state->timers));
  46     time_state->num_timers = 0;
  47
  48     v3_register_hypercall(info->vm_info, TIME_CPUFREQ_HCALL, handle_cpufreq_hcall, NULL);
  49 }
  50
  51
  52 int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops, void * private_data) {
  53     struct vm_timer * timer = NULL;
  54     timer = (struct vm_timer *)V3_Malloc(sizeof(struct vm_timer));
  55     V3_ASSERT(timer != NULL);
  56
  57     timer->ops = ops;
  58     timer->private_data = private_data;
  59
  60     list_add(&(timer->timer_link), &(info->time_state.timers));
  61     info->time_state.num_timers++;
  62
  63     return 0;
  64 }
  65
  66
  67 int v3_remove_timer(struct guest_info * info, struct vm_timer * timer) {
  68     list_del(&(timer->timer_link));
  69     info->time_state.num_timers--;
  70
  71     V3_Free(timer);
  72     return 0;
  73 }
  74
  75
  76
  77 void v3_update_time(struct guest_info * info, uint64_t cycles) {
  78     struct vm_timer * tmp_timer;
  79
  80     //   cycles *= 8;
  81
  82 //    cycles /= 150;
  83
  84     info->time_state.guest_tsc += cycles;
  85
  86     list_for_each_entry(tmp_timer, &(info->time_state.timers), timer_link) {
  87         tmp_timer->ops->update_time(info, cycles, info->time_state.cpu_freq, tmp_timer->private_data);
  88     }
  89
  90
  91
  92     //info->time_state.pending_cycles = 0;
  93 }
  94
  95 void v3_advance_time(struct guest_info * core) {
  96     struct vm_timer * tmp_timer;
  97
  98
  99     list_for_each_entry(tmp_timer, &(core->time_state.timers), timer_link) {
 100         tmp_timer->ops->advance_timer(core, tmp_timer->private_data);
 101     }
 102
 103
 104
 105 }