X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=9293329f7bae6a93bb6f60d87d7aa27332793e9b;hb=cbe14745457d9a646157633e1fa8eccffe035953;hp=43643589888a7699d278aab545d374c3ed87c6f1;hpb=cd3edffa0e451af761b9dcee021ca06ebb301345;p=palacios.git

diff --git a/palacios/include/palacios/vmm_time.h b/palacios/include/palacios/vmm_time.h
index 4364358..9293329 100644
--- a/palacios/include/palacios/vmm_time.h
+++ b/palacios/include/palacios/vmm_time.h
@@ -7,11 +7,13 @@
  * 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".
@@ -29,81 +31,111 @@
 
 struct guest_info;
 
-struct vm_time {
+
+/* 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)
+
+/* 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!
-         
-    sint64_t guest_host_offset;// Offset of monotonic guest time from host time
-    sint64_t tsc_guest_offset; // Offset of guest TSC from monotonic guest time
-    
-    uint64_t last_update;      // Last time (in monotonic guest time) the 
+
+    // Multipliers for TSC speed and performance speed
+    uint32_t clock_ratio_num, clock_ratio_denom;
+    uint32_t ipc_ratio_num, ipc_ratio_denom;
+
+    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
 
-    uint64_t initial_time;     // Time when VMM started. 
-    
+    uint64_t initial_host_time;// Host time when VMM started. 
     struct v3_msr tsc_aux;     // Auxilliary MSR for RDTSCP
 
+    int flags;
+	
     // Installed Timers slaved off of the guest monotonic TSC
     uint_t num_timers;
     struct list_head timers;
-};
-
 
+};
 
+#define VM_TIME_SLAVE_HOST (1 << 0)
+#define VM_TIME_TSC_PASSTHROUGH (1 << 1)
+#define VM_TIME_TRAP_RDTSC (1 << 2)
 
-struct vm_timer_ops {
+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 vm_timer {
+struct v3_timer {
     void * private_data;
-    struct vm_timer_ops * ops;
+    struct v3_timer_ops * ops;
+
+    // Need to add accuracy/resolution fields later.
 
     struct list_head timer_link;
 };
 
 
 
+// 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);
 
-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_timers(struct guest_info * info);
+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);
 
-void v3_init_time(struct guest_info * info);
-int v3_start_time(struct guest_info * info);
-int v3_adjust_time(struct guest_info * info);
+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);
 
-// Returns host time
-static inline uint64_t v3_get_host_time(struct vm_time *t) {
+// 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_time *t) {
-    return v3_get_host_time(t) + t->guest_host_offset;
+static inline uint64_t v3_get_guest_time(struct vm_core_time *t) {
+    return t->guest_cycles;
 }
 
-// Returns the TSC value seen by the guest
-static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
+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_time *time_state) {
-    return time_state->guest_host_offset + time_state->tsc_guest_offset;
+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