migration: Move postcopy-ram.h to migration/

It is internal to migration, not intended for other users.

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

5 files changed, 95 insertions, 4 deletions

diff --git a/migration/migration.c b/migration/migration.c
index 353f2728cf..799952ce99 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -26,7 +26,7 @@
 #include "qemu/sockets.h"
 #include "qemu/rcu.h"
 #include "migration/block.h"
-#include "migration/postcopy-ram.h"
+#include "postcopy-ram.h"
 #include "qemu/thread.h"
 #include "qmp-commands.h"
 #include "trace.h"
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index e3f4a37b46..cdadaf6578 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -20,7 +20,7 @@
 
 #include "qemu-common.h"
 #include "migration/migration.h"
-#include "migration/postcopy-ram.h"
+#include "postcopy-ram.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/balloon.h"
 #include "qemu/error-report.h"
diff --git a/migration/postcopy-ram.h b/migration/postcopy-ram.h
new file mode 100644
index 0000000000..4c25f03be2
--- /dev/null
+++ b/migration/postcopy-ram.h
@@ -0,0 +1,91 @@
+/*
+ * Postcopy migration for RAM
+ *
+ * Copyright 2013 Red Hat, Inc. and/or its affiliates
+ *
+ * Authors:
+ *  Dave Gilbert  <dgilbert@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#ifndef QEMU_POSTCOPY_RAM_H
+#define QEMU_POSTCOPY_RAM_H
+
+/* Return true if the host supports everything we need to do postcopy-ram */
+bool postcopy_ram_supported_by_host(void);
+
+/*
+ * Make all of RAM sensitive to accesses to areas that haven't yet been written
+ * and wire up anything necessary to deal with it.
+ */
+int postcopy_ram_enable_notify(MigrationIncomingState *mis);
+
+/*
+ * Initialise postcopy-ram, setting the RAM to a state where we can go into
+ * postcopy later; must be called prior to any precopy.
+ * called from ram.c's similarly named ram_postcopy_incoming_init
+ */
+int postcopy_ram_incoming_init(MigrationIncomingState *mis, size_t ram_pages);
+
+/*
+ * At the end of a migration where postcopy_ram_incoming_init was called.
+ */
+int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis);
+
+/*
+ * 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
+ */
+int postcopy_ram_prepare_discard(MigrationIncomingState *mis);
+
+/*
+ * Called at the start of each RAMBlock by the bitmap code.
+ * Returns a new PDS
+ */
+PostcopyDiscardState *postcopy_discard_send_init(MigrationState *ms,
+                                                 const char *name);
+
+/*
+ * Called by the bitmap code for each chunk to discard.
+ * May send a discard message, may just leave it queued to
+ * be sent later.
+ * @start,@length: a range of pages in the migration bitmap in the
+ *  RAM block passed to postcopy_discard_send_init() (length=1 is one page)
+ */
+void postcopy_discard_send_range(MigrationState *ms, PostcopyDiscardState *pds,
+                                 unsigned long start, unsigned long length);
+
+/*
+ * Called at the end of each RAMBlock by the bitmap code.
+ * Sends any outstanding discard messages, frees the PDS.
+ */
+void postcopy_discard_send_finish(MigrationState *ms,
+                                  PostcopyDiscardState *pds);
+
+/*
+ * Place a page (from) at (host) efficiently
+ *    There are restrictions on how 'from' must be mapped, in general best
+ *    to use other postcopy_ routines to allocate.
+ * returns 0 on success
+ */
+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,
+                             size_t pagesize);
+
+/*
+ * Allocate a page of memory that can be mapped at a later point in time
+ * using postcopy_place_page
+ * Returns: Pointer to allocated page
+ */
+void *postcopy_get_tmp_page(MigrationIncomingState *mis);
+
+#endif
diff --git a/migration/ram.c b/migration/ram.c
index 1f03469c13..4918c11576 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -36,7 +36,7 @@
 #include "qemu/timer.h"
 #include "qemu/main-loop.h"
 #include "migration/migration.h"
-#include "migration/postcopy-ram.h"
+#include "postcopy-ram.h"
 #include "exec/address-spaces.h"
 #include "migration/page_cache.h"
 #include "qemu/error-report.h"
diff --git a/migration/savevm.c b/migration/savevm.c
index ff78a8948d..7668510cfc 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -36,7 +36,7 @@
 #include "sysemu/sysemu.h"
 #include "qemu/timer.h"
 #include "migration/migration.h"
-#include "migration/postcopy-ram.h"
+#include "postcopy-ram.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/error-report.h"
 #include "qemu/queue.h"