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-rw-r--r--memory.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/memory.c b/memory.c
index ef87363067..1b03d2251c 100644
--- a/memory.c
+++ b/memory.c
@@ -1403,6 +1403,26 @@ void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
notifier_list_add(&mr->iommu_notify, n);
}
+void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n,
+ hwaddr granularity, bool is_write)
+{
+ hwaddr addr;
+ IOMMUTLBEntry iotlb;
+
+ for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
+ iotlb = mr->iommu_ops->translate(mr, addr, is_write);
+ if (iotlb.perm != IOMMU_NONE) {
+ n->notify(n, &iotlb);
+ }
+
+ /* if (2^64 - MR size) < granularity, it's possible to get an
+ * infinite loop here. This should catch such a wraparound */
+ if ((addr + granularity) < addr) {
+ break;
+ }
+ }
+}
+
void memory_region_unregister_iommu_notifier(Notifier *n)
{
notifier_remove(n);