commit 39b796f28c7b42cbecdba56612b5f9c505572f07
author Avi Kivity <avi@redhat.com> Sun Jul 31 22:47:58 2011 +0300
committer Anthony Liguori <aliguori@us.ibm.com> Fri Aug 05 10:57:36 2011 -0500
tree 87db2934c17c74c2508b71fb381722f293d7a1d7
parent 9510a486381c073a98d96db85b1102313fea9e03

memory: synchronize dirty bitmap before unmapping a range

When a range is being unmapped, ask accelerators (e.g. kvm) to synchronize the
dirty bitmap to avoid losing information forever.

Fixes grub2 screen update.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

memory.c

diff --git a/memory.c b/memory.c
index 5c6e63d..5f20320 100644
--- a/memory.c
+++ b/memory.c
@@ -245,6 +245,10 @@
 
 static void as_memory_range_del(AddressSpace *as, FlatRange *fr)
 {
+    if (fr->dirty_log_mask) {
+        cpu_physical_sync_dirty_bitmap(fr->addr.start,
+                                       fr->addr.start + fr->addr.size);
+    }
     cpu_register_physical_memory(fr->addr.start, fr->addr.size,
                                  IO_MEM_UNASSIGNED);
 }