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.


Still working on timer updates, heading towards being able to have a CPU
[palacios.git] / palacios / include / palacios / vmm_time.h
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 #ifndef __VMM_TIME_H
21 #define __VMM_TIME_H
22
23 #ifdef __V3VEE__
24
25 #include <palacios/vmm_types.h>
26 #include <palacios/vmm_list.h>
27 #include <palacios/vmm_msr.h>
28 #include <palacios/vmm_util.h>
29
30 struct guest_info;
31
32 struct vm_time {
33     uint32_t cpu_freq;         // in kHZ in terms of guest CPU speed
34                                // which ideally can be different lower than
35                                // host CPU speed!
36          
37     uint32_t time_mult;        // Fields for computing monotonic guest time
38     uint32_t time_div;         // from host (tsc) time
39     sint64_t time_offset;      
40
41     sint64_t tsc_time_offset;  // Offset for computing guest TSC value from
42                                // monotonic guest time
43     
44     uint64_t last_update;      // Last time (in monotonic guest time) the 
45                                // timers were updated
46
47     uint64_t pause_time;       // Cache value to help calculate the guest_tsc
48     
49     struct v3_msr tsc_aux;     // Auxilliary MSR for RDTSCP
50
51     // Installed Timers slaved off of the guest monotonic TSC
52     uint_t num_timers;
53     struct list_head timers;
54 };
55
56
57
58
59 struct vm_timer_ops {
60     void (*update_timer)(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
61     void (*advance_timer)(struct guest_info * info, void * private_data);
62 };
63
64 struct vm_timer {
65     void * private_data;
66     struct vm_timer_ops * ops;
67
68     struct list_head timer_link;
69 };
70
71
72
73
74 int v3_add_timer(struct guest_info * info, struct vm_timer_ops * ops, void * private_data);
75 int v3_remove_timer(struct guest_info * info, struct vm_timer * timer);
76 void v3_update_timers(struct guest_info * info);
77
78
79 void v3_init_time(struct guest_info * info);
80 int v3_start_time(struct guest_info * info);
81 int v3_pause_time(struct guest_info * info);
82 int v3_resume_time(struct guest_info * info);
83
84 // Returns host time
85 static inline uint64_t v3_get_host_time(struct vm_time *t) {
86     uint64_t tmp;
87     rdtscll(tmp);
88     return tmp;
89 }
90
91 // Returns *monotonic* guest time.
92 static inline uint64_t v3_get_guest_time(struct vm_time *t) {
93     if (t->pause_time) return t->pause_time;
94     else return v3_get_host_time(t) + t->time_offset;
95 }
96
97 // Returns the TSC value seen by the guest
98 static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
99     return v3_get_guest_time(t) + t->tsc_time_offset;
100 }
101
102 #define TSC_MSR     0x10
103 #define TSC_AUX_MSR 0xC0000103
104
105 int v3_handle_rdtscp(struct guest_info *info);
106 int v3_handle_rdtsc(struct guest_info *info);
107
108 #endif // !__V3VEE__
109
110 #endif