migration: Make savevm.c target independent

It only needed TARGET_PAGE_SIZE/BITS/BITS_MIN values, so just export
them from exec.h

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

Makefile.target

@@ -146,7 +146,7 @@ obj-$(CONFIG_KVM) += kvm-all.o
 obj-y += memory.o cputlb.o
 obj-y += memory_mapping.o
 obj-y += dump.o
-obj-y += migration/ram.o migration/savevm.o
+obj-y += migration/ram.o
 LIBS := $(libs_softmmu) $(LIBS)
 
 # Hardware support

exec.c

@@ -3444,6 +3444,15 @@ size_t qemu_target_page_size(void)
     return TARGET_PAGE_SIZE;
 }
 
+int qemu_target_page_bits(void)
+{
+    return TARGET_PAGE_BITS;
+}
+
+int qemu_target_page_bits_min(void)
+{
+    return TARGET_PAGE_BITS_MIN;
+}
 #endif
 
 /*

include/exec/target_page.h

@@ -15,5 +15,7 @@
 #define EXEC_TARGET_PAGE_H
 
 size_t qemu_target_page_size(void);
+int qemu_target_page_bits(void);
+int qemu_target_page_bits_min(void);
 
 #endif

migration/Makefile.objs

@@ -1,5 +1,5 @@
 common-obj-y += migration.o socket.o fd.o exec.o
-common-obj-y += tls.o channel.o
+common-obj-y += tls.o channel.o savevm.o
 common-obj-y += colo-comm.o colo.o colo-failover.o
 common-obj-y += vmstate.o vmstate-types.o page_cache.o
 common-obj-y += qemu-file.o

migration/savevm.c

@@ -27,7 +27,6 @@
  */
 
 #include "qemu/osdep.h"
-#include "cpu.h"
 #include "hw/boards.h"
 #include "hw/hw.h"
 #include "hw/qdev.h"
@@ -288,7 +287,7 @@ static void configuration_pre_save(void *opaque)
 
     state->len = strlen(current_name);
     state->name = current_name;
-    state->target_page_bits = TARGET_PAGE_BITS;
+    state->target_page_bits = qemu_target_page_bits();
 }
 
 static int configuration_pre_load(void *opaque)
@@ -299,7 +298,7 @@ static int configuration_pre_load(void *opaque)
      * predates the variable-target-page-bits support and is using the
      * minimum possible value for this CPU.
      */
-    state->target_page_bits = TARGET_PAGE_BITS_MIN;
+    state->target_page_bits = qemu_target_page_bits_min();
     return 0;
 }
 
@@ -314,9 +313,9 @@ static int configuration_post_load(void *opaque, int version_id)
         return -EINVAL;
     }
 
-    if (state->target_page_bits != TARGET_PAGE_BITS) {
+    if (state->target_page_bits != qemu_target_page_bits()) {
         error_report("Received TARGET_PAGE_BITS is %d but local is %d",
-                     state->target_page_bits, TARGET_PAGE_BITS);
+                     state->target_page_bits, qemu_target_page_bits());
         return -EINVAL;
     }
 
@@ -332,7 +331,8 @@ static int configuration_post_load(void *opaque, int version_id)
  */
 static bool vmstate_target_page_bits_needed(void *opaque)
 {
-    return TARGET_PAGE_BITS > TARGET_PAGE_BITS_MIN;
+    return qemu_target_page_bits()
+        > qemu_target_page_bits_min();
 }
 
 static const VMStateDescription vmstate_target_page_bits = {
@@ -1138,7 +1138,7 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
     }
 
     vmdesc = qjson_new();
-    json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
+    json_prop_int(vmdesc, "page_size", qemu_target_page_size());
     json_start_array(vmdesc, "devices");
     QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {