SWDEV-508632 - Align address to 2 MBs for hidden heap allocation. (#29)

rocclr/device/devhostcall.cpp

@@ -102,7 +102,8 @@ static void handlePayload(MessageHandler& messages, uint32_t service, uint64_t*
         }
       } else {
         amd::Context& ctx = dev.context();
-        amd::Buffer* buf = new(ctx) amd::Buffer(ctx, CL_MEM_READ_WRITE, payload[1]);
+        amd::Buffer* buf = new(ctx) amd::Buffer(ctx, CL_MEM_READ_WRITE, payload[1], NULL,
+                                               (payload[1]  == 2 * Mi) ? 2 * Mi : 0);
         uint64_t va = 0;
         if (buf) {
           if (buf->create()) {