X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_time.h;h=33ffa2c0fc06996505798a20324c0b4285fe5feb;hb=0e26b3738daf436ba2d9a088ba620a3583d40de3;hp=5e9a1f387490a6fee409c5d7c29976547efee13a;hpb=7cdedeb7a01b51c5242cce94924f2ea246008e7d;p=palacios.git

diff --git a/palacios/include/palacios/vmm_time.h b/palacios/include/palacios/vmm_time.h
index 5e9a1f3..33ffa2c 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".
@@ -24,52 +26,108 @@
 
 #include <palacios/vmm_types.h>
 #include <palacios/vmm_list.h>
+#include <palacios/vmm_msr.h>
+#include <palacios/vmm_util.h>
 
 struct guest_info;
 
 struct vm_time {
-  uint32_t cpu_freq; // in kHZ
+    uint32_t host_cpu_freq;    // in kHZ 
+    uint32_t guest_cpu_freq;   // can be lower than host CPU freq!
 
-  // Total number of guest run time cycles
-  ullong_t guest_tsc;
+    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
 
-  // Cache value to help calculate the guest_tsc
-  ullong_t cached_host_tsc;
+    uint64_t last_update;      // Last time (in monotonic guest time) the 
+                               // timers were updated
 
-  // The number of cycles pending for notification to the timers
-  //ullong_t pending_cycles;
+    uint64_t initial_time;     // Time when VMM started. 
+    uint64_t enter_time;       // Host time the guest was last entered
+    uint64_t exit_time;        // Host time the the VM was exited to
+    struct v3_msr tsc_aux;     // Auxilliary MSR for RDTSCP
 
-  // Installed Timers 
-  uint_t num_timers;
-  struct list_head timers;
+    // Installed Timers slaved off of the guest monotonic TSC
+    uint_t num_timers;
+    struct list_head timers;
 };
 
+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 v3_timer {
+    void * private_data;
+    struct v3_timer_ops * ops;
 
+    struct list_head timer_link;
+};
 
-struct vm_timer_ops {
- void (*update_time)(ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data);
+// 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);
 
-};
+void v3_deinit_time_core(struct guest_info * core);
+void v3_deinit_time_vm(struct v3_vm_info * vm);
 
-struct vm_timer {
-  void * private_data;
-  struct vm_timer_ops * ops;
+int v3_start_time(struct guest_info * core);
 
-  struct list_head timer_link;
-};
+int v3_time_enter_vm(struct guest_info * core);
+int v3_time_exit_vm(struct guest_info * core);
+
+int v3_adjust_time(struct guest_info * core);
+int v3_offset_time(struct guest_info * core, sint64_t offset);
+
+// Basic functions for attaching timers to the passage of time
+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);
+
+// Functions to return the different notions of time in Palacios.
+static inline uint64_t v3_get_host_time(struct vm_time *t) {
+    uint64_t tmp;
+    rdtscll(tmp);
+    return tmp;
+}
+
+// Returns *monotonic* guest time.
+static inline uint64_t v3_compute_guest_time(struct vm_time *t, uint64_t ht) {
+#ifdef V3_CONFIG_TIME_HIDE_VM_COST
+    V3_ASSERT(t->exit_time);
+    return t->exit_time + t->guest_host_offset;
+#else
+    return v3_get_host_time(t) + t->guest_host_offset;
+#endif
+}
+
+static inline uint64_t v3_get_guest_time(struct vm_time *t) {
+    return v3_compute_guest_time(t, v3_get_host_time(t));
+}
 
+// Returns the TSC value seen by the guest
+static inline uint64_t v3_compute_guest_tsc(struct vm_time *t, uint64_t ht) {
+    return v3_compute_guest_time(t, ht) + t->tsc_guest_offset;
+}
 
+static inline uint64_t v3_get_guest_tsc(struct vm_time *t) {
+    return v3_compute_guest_tsc(t, v3_get_host_time(t));
+}
 
+// 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;
+}
 
-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);
+// 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);
 
-void v3_update_time(struct guest_info * info, ullong_t cycles);
 
 
-void v3_init_time(struct guest_info * info);
 
 #endif // !__V3VEE__