Add wrappers and handlers for sending/receiving the postcopy-ram migration messages.

The state of the postcopy process is managed via a series of messages;
   * Add wrappers and handlers for sending/receiving these messages
   * Add state variable that track the current state of postcopy

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 70473f4..6225e00 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -89,6 +89,16 @@ enum qemu_vm_cmd {
     MIG_CMD_INVALID = 0,   /* Must be 0 */
     MIG_CMD_OPEN_RETURN_PATH,  /* Tell the dest to open the Return path */
     MIG_CMD_PING,              /* Request a PONG on the RP */
+
+    MIG_CMD_POSTCOPY_ADVISE,       /* Prior to any page transfers, just
+                                      warn we might want to do PC */
+    MIG_CMD_POSTCOPY_LISTEN,       /* Start listening for incoming
+                                      pages as it's running. */
+    MIG_CMD_POSTCOPY_RUN,          /* Start execution */
+
+    MIG_CMD_POSTCOPY_RAM_DISCARD,  /* A list of pages to discard that
+                                      were previously sent during
+                                      precopy but are dirty. */
     MIG_CMD_MAX
 };
 
@@ -104,6 +114,15 @@ void qemu_savevm_command_send(QEMUFile *f, enum qemu_vm_cmd command,
                               uint16_t len, uint8_t *data);
 void qemu_savevm_send_ping(QEMUFile *f, uint32_t value);
 void qemu_savevm_send_open_return_path(QEMUFile *f);
+void qemu_savevm_send_postcopy_advise(QEMUFile *f);
+void qemu_savevm_send_postcopy_listen(QEMUFile *f);
+void qemu_savevm_send_postcopy_run(QEMUFile *f);
+
+void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name,
+                                           uint16_t len,
+                                           uint64_t *start_list,
+                                           uint64_t *length_list);
+
 int qemu_loadvm_state(QEMUFile *f);
 
 typedef enum DisplayType