ramblock-notifier: new

This adds a notify interface of ram block additions and removals.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/exec.c b/exec.c
index c95ae3344d..067c51ba81 100644
--- a/exec.c
+++ b/exec.c
@@ -1687,6 +1687,7 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
         qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE);
         /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */
         qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK);
+        ram_block_notify_add(new_block->host, new_block->max_length);
     }
 }
 
@@ -1817,6 +1818,10 @@ void qemu_ram_free(RAMBlock *block)
         return;
     }
 
+    if (block->host) {
+        ram_block_notify_remove(block->host, block->max_length);
+    }
+
     qemu_mutex_lock_ramlist();
     QLIST_REMOVE_RCU(block, next);
     ram_list.mru_block = NULL;