Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


ad951e20d25e34e96ab9242dea30a172b17616a3
[palacios.git] / palacios / src / palacios / vmm_timeout.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) 2012, Jack Lange <jacklange@cs.pitt.edu> 
11  * Copyright (c) 2012, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Jack Lange <jacklange@cs.pitt.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
21 #include <palacios/vmm.h>
22 #include <palacios/vm_guest.h>
23 #include <palacios/vmm_timeout.h>
24
25
26
27 int v3_add_core_timeout(struct guest_info * core, uint64_t cycles,
28                         int (*callback)(struct guest_info * core, 
29                                         void * private_data),
30                         void * private_data) {
31     struct v3_core_timeouts * timeouts = &(core->timeouts);
32
33     if (timeouts->timeout_active) {
34         PrintError("Tried to activate a timeout whiel one is already active\n");
35         return -1;
36     }
37
38     timeouts->callback = callback;
39     timeouts->private_data = private_data;
40     timeouts->timeout_active = 1;
41     timeouts->next_timeout = cycles;
42
43     return 0;
44 }
45
46
47
48 int v3_handle_timeouts(struct guest_info * core, uint64_t guest_cycles) {
49     struct v3_core_timeouts * timeouts = &(core->timeouts);
50
51     /*
52     V3_Print("Handling timeout from %llu guest cycles (Next timeout=%llu)\n", guest_cycles,
53              timeouts->next_timeout);
54     */
55
56     if (guest_cycles >= timeouts->next_timeout) {
57         timeouts->next_timeout = 0;
58         timeouts->timeout_active = 0;
59
60         if (timeouts->callback) {
61
62             V3_Print("Calling timeout callback\n");
63             timeouts->callback(core, timeouts->private_data);
64         }
65     } else {
66         timeouts->next_timeout -= guest_cycles;
67     }
68
69     return 0;
70 }