[PATCH v2 23/29] migration/ram: Add a wrapper for fixed-ram shadow bitmap

[Fabiano Rosas]

We'll need to set the shadow_bmap bits from outside ram.c soon and
TARGET_PAGE_BITS is poisoned, so add a wrapper to it.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
 migration/ram.c | 5 +++++
 migration/ram.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/migration/ram.c b/migration/ram.c
index cea6971ab2..8e34c1b597 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -3160,6 +3160,11 @@ static void ram_save_shadow_bmap(QEMUFile *f)
     }
 }
 
+void ramblock_set_shadow_bmap_atomic(RAMBlock *block, ram_addr_t offset)
+{
+    set_bit_atomic(offset >> TARGET_PAGE_BITS, block->shadow_bmap);
+}
+
 /**
  * ram_save_iterate: iterative stage for migration
  *
diff --git a/migration/ram.h b/migration/ram.h
index 145c915ca7..1acadffb06 100644
--- a/migration/ram.h
+++ b/migration/ram.h
@@ -75,6 +75,7 @@ int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
 bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start);
 void postcopy_preempt_shutdown_file(MigrationState *s);
 void *postcopy_preempt_thread(void *opaque);
+void ramblock_set_shadow_bmap_atomic(RAMBlock *block, ram_addr_t offset);
 
 /* ram cache */
 int colo_init_ram_cache(void);
-- 
2.35.3