memory: provide iommu_replay_all()

This is an "global" version of existing memory_region_iommu_replay() -
we announce the translations to all the registered notifiers, instead of
a specific one.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-4-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 07e43daf204cc40e9174203002837207da52f708..fb7dff3405d3db1ec272db9ad5159f726a432b9c 100644 (file)
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -712,6 +712,14 @@ void memory_region_register_iommu_notifier(MemoryRegion *mr,
 void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
                                 bool is_write);
 
+/**
+ * memory_region_iommu_replay_all: replay existing IOMMU translations
+ * to all the notifiers registered.
+ *
+ * @mr: the memory region to observe
+ */
+void memory_region_iommu_replay_all(MemoryRegion *mr);
+
 /**
  * memory_region_unregister_iommu_notifier: unregister a notifier for
  * changes to IOMMU translation entries.

diff --git a/memory.c b/memory.c
index 7496b3d3d5c3e4a14edb3258e0a16f5618984f98..b4ed67b27a619b76cbb38fec1c59f24cdaf7dbf9 100644 (file)
--- a/memory.c
+++ b/memory.c
@@ -1642,6 +1642,15 @@ void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n,
     }
 }
 
+void memory_region_iommu_replay_all(MemoryRegion *mr)
+{
+    IOMMUNotifier *notifier;
+
+    IOMMU_NOTIFIER_FOREACH(notifier, mr) {
+        memory_region_iommu_replay(mr, notifier, false);
+    }
+}
+
 void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
                                              IOMMUNotifier *n)
 {