3 files changed, 14 insertions, 9 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 1735d66512..5720c884f4 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -22,6 +22,7 @@
 #include "qapi-types.h"
 #include "exec/cpu-common.h"
 #include "qemu/coroutine_int.h"
+#include "qom/object.h"
 
 #define QEMU_VM_FILE_MAGIC           0x5145564d
 #define QEMU_VM_FILE_VERSION_COMPAT  0x00000002
@@ -92,6 +93,7 @@ struct MigrationIncomingState {
      */
     QemuEvent main_thread_load_event;
 
+    size_t         largest_page_size;
     bool           have_fault_thread;
     QemuThread     fault_thread;
     QemuSemaphore  fault_thread_sem;
@@ -107,6 +109,7 @@ struct MigrationIncomingState {
     QEMUFile *to_src_file;
     QemuMutex rp_mutex;    /* We send replies from multiple threads */
     void     *postcopy_tmp_page;
+    void     *postcopy_tmp_zero_page;
 
     QEMUBH *bh;
 
@@ -313,6 +316,8 @@ int migrate_add_blocker(Error *reason, Error **errp);
  */
 void migrate_del_blocker(Error *reason);
 
+int check_migratable(Object *obj, Error **err);
+
 bool migrate_release_ram(void);
 bool migrate_postcopy_ram(void);
 bool migrate_zero_blocks(void);
@@ -375,6 +380,7 @@ void global_state_store_running(void);
 void flush_page_queue(MigrationState *ms);
 int ram_save_queue_pages(MigrationState *ms, const char *rbname,
                          ram_addr_t start, ram_addr_t len);
+uint64_t ram_pagesize_summary(void);
 
 PostcopyState postcopy_state_get(void);
 /* Set the state and return the old state */
diff --git a/include/migration/postcopy-ram.h b/include/migration/postcopy-ram.h
index b6a7491f2d..8e036b95a2 100644
--- a/include/migration/postcopy-ram.h
+++ b/include/migration/postcopy-ram.h
@@ -35,13 +35,6 @@ int postcopy_ram_incoming_init(MigrationIncomingState *mis, size_t ram_pages);
 int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis);
 
 /*
- * Discard the contents of 'length' bytes from 'start'
- * We can assume that if we've been called postcopy_ram_hosttest returned true
- */
-int postcopy_ram_discard_range(MigrationIncomingState *mis, uint8_t *start,
-                               size_t length);
-
-/*
  * Userfault requires us to mark RAM as NOHUGEPAGE prior to discard
  * however leaving it until after precopy means that most of the precopy
  * data is still THPd
@@ -81,13 +74,15 @@ void postcopy_discard_send_finish(MigrationState *ms,
  *    to use other postcopy_ routines to allocate.
  * returns 0 on success
  */
-int postcopy_place_page(MigrationIncomingState *mis, void *host, void *from);
+int postcopy_place_page(MigrationIncomingState *mis, void *host, void *from,
+                        size_t pagesize);
 
 /*
  * Place a zero page at (host) atomically
  * returns 0 on success
  */
-int postcopy_place_page_zero(MigrationIncomingState *mis, void *host);
+int postcopy_place_page_zero(MigrationIncomingState *mis, void *host,
+                             size_t pagesize);
 
 /*
  * Allocate a page of memory that can be mapped at a later point in time
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 63e7b02e05..f2dbf8410a 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -253,6 +253,10 @@ extern const VMStateInfo vmstate_info_uint16;
 extern const VMStateInfo vmstate_info_uint32;
 extern const VMStateInfo vmstate_info_uint64;
 
+/** Put this in the stream when migrating a null pointer.*/
+#define VMS_NULLPTR_MARKER (0x30U) /* '0' */
+extern const VMStateInfo vmstate_info_nullptr;
+
 extern const VMStateInfo vmstate_info_float64;
 extern const VMStateInfo vmstate_info_cpudouble;