kvm: Rework dirty bitmap synchronization

Extend kvm_physical_sync_dirty_bitmap() so that is can sync across
multiple slots. Useful for updating the whole dirty log during
migration. Moreover, properly pass down errors the whole call chain.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/cpu-all.h b/cpu-all.h
index b23be6094..dc9b034cb 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -901,7 +901,8 @@ int cpu_physical_memory_set_dirty_tracking(int enable);
 
 int cpu_physical_memory_get_dirty_tracking(void);
 
-void cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, target_phys_addr_t end_addr);
+int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
+                                   target_phys_addr_t end_addr);
 
 void dump_exec_info(FILE *f,
                     int (*cpu_fprintf)(FILE *f, const char *fmt, ...));