memory: introduce memory_region_notify_one()

Generalizing the notify logic in memory_region_notify_iommu() into a
single function. This can be further used in customized replay()
functions for IOMMUs.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-5-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 24 insertions, 16 deletions

diff --git a/memory.c b/memory.c
index b4ed67b27a..ded4bf13d6 100644
--- a/memory.c
+++ b/memory.c
@@ -1662,32 +1662,40 @@ void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
     memory_region_update_iommu_notify_flags(mr);
 }
 
-void memory_region_notify_iommu(MemoryRegion *mr,
-                                IOMMUTLBEntry entry)
+void memory_region_notify_one(IOMMUNotifier *notifier,
+                              IOMMUTLBEntry *entry)
 {
-    IOMMUNotifier *iommu_notifier;
     IOMMUNotifierFlag request_flags;
 
-    assert(memory_region_is_iommu(mr));
+    /*
+     * Skip the notification if the notification does not overlap
+     * with registered range.
+     */
+    if (notifier->start > entry->iova + entry->addr_mask + 1 ||
+        notifier->end < entry->iova) {
+        return;
+    }
 
-    if (entry.perm & IOMMU_RW) {
+    if (entry->perm & IOMMU_RW) {
         request_flags = IOMMU_NOTIFIER_MAP;
     } else {
         request_flags = IOMMU_NOTIFIER_UNMAP;
     }
 
+    if (notifier->notifier_flags & request_flags) {
+        notifier->notify(notifier, entry);
+    }
+}
+
+void memory_region_notify_iommu(MemoryRegion *mr,
+                                IOMMUTLBEntry entry)
+{
+    IOMMUNotifier *iommu_notifier;
+
+    assert(memory_region_is_iommu(mr));
+
     IOMMU_NOTIFIER_FOREACH(iommu_notifier, mr) {
-        /*
-         * Skip the notification if the notification does not overlap
-         * with registered range.
-         */
-        if (iommu_notifier->start > entry.iova + entry.addr_mask + 1 ||
-            iommu_notifier->end < entry.iova) {
-            continue;
-        }
-        if (iommu_notifier->notifier_flags & request_flags) {
-            iommu_notifier->notify(iommu_notifier, &entry);
-        }
+        memory_region_notify_one(iommu_notifier, &entry);
     }
 }