--- a/src/hotspot/share/runtime/arguments.cpp	Fri Sep 28 15:39:31 2018 +0300
+++ b/src/hotspot/share/runtime/arguments.cpp	Thu Sep 27 17:13:07 2018 +0200
@@ -3851,6 +3851,10 @@
   UNSUPPORTED_OPTION(UseLargePages);
 #endif
 
+#if defined(AIX)
+  UNSUPPORTED_OPTION(AllocateHeapAt);
+#endif
+
   ArgumentsExt::report_unsupported_options();
 
 #ifndef PRODUCT

--- a/test/hotspot/jtreg/gc/TestAllocateHeapAt.java	Fri Sep 28 15:39:31 2018 +0300
+++ b/test/hotspot/jtreg/gc/TestAllocateHeapAt.java	Thu Sep 27 17:13:07 2018 +0200
@@ -24,7 +24,7 @@
 /* @test TestAllocateHeapAt.java
  * @key gc
  * @summary Test to check allocation of Java Heap with AllocateHeapAt option
- * @requires vm.gc != "Z"
+ * @requires vm.gc != "Z" & os.family != "aix"
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  */

--- a/test/hotspot/jtreg/gc/TestAllocateHeapAtError.java	Fri Sep 28 15:39:31 2018 +0300
+++ b/test/hotspot/jtreg/gc/TestAllocateHeapAtError.java	Thu Sep 27 17:13:07 2018 +0200
@@ -24,7 +24,7 @@
 /* @test TestAllocateHeapAtError.java
  * @key gc
  * @summary Test to check correct handling of non-existent directory passed to AllocateHeapAt option
- * @requires vm.gc != "Z"
+ * @requires vm.gc != "Z" & os.family != "aix"
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  */

--- a/test/hotspot/jtreg/gc/TestAllocateHeapAtMultiple.java	Fri Sep 28 15:39:31 2018 +0300
+++ b/test/hotspot/jtreg/gc/TestAllocateHeapAtMultiple.java	Thu Sep 27 17:13:07 2018 +0200
@@ -26,7 +26,7 @@
  * @summary Test to check allocation of Java Heap with AllocateHeapAt option. Has multiple sub-tests to cover different code paths.
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
- * @requires vm.bits == "64" & vm.gc != "Z"
+ * @requires vm.bits == "64" & vm.gc != "Z" & os.family != "aix"
  */
 
 import jdk.test.lib.JDKToolFinder;

--- a/test/hotspot/jtreg/gc/stress/gcbasher/TestGCBasherWithAllocateHeapAt.java	Fri Sep 28 15:39:31 2018 +0300
+++ b/test/hotspot/jtreg/gc/stress/gcbasher/TestGCBasherWithAllocateHeapAt.java	Thu Sep 27 17:13:07 2018 +0200
@@ -28,7 +28,7 @@
  * @test TestGCBasherWithAllocateHeapAt
  * @key gc stress
  * @requires vm.gc.G1
- * @requires vm.flavor == "server" & !vm.emulatedClient
+ * @requires vm.flavor == "server" & !vm.emulatedClient & os.family != "aix"
  * @summary Stress Java heap allocation with AllocateHeapAt flag using GC basher.
  * @run main/othervm/timeout=500 -Xlog:gc*=info -Xmx256m -server -XX:+UseG1GC -XX:AllocateHeapAt=. TestGCBasherWithAllocateHeapAt 120000
  */