SWDEV-398047 - Disable arena for XNACK.

Change-Id: If6c98490bd5b8146a357f45ed132f687def0877f

hipamd/src/hip_memory.cpp

@@ -34,7 +34,7 @@ std::unordered_set<hipArray*> hip::hipArraySet;
 amd::Memory* getMemoryObject(const void* ptr, size_t& offset, size_t size) {
   auto memObj = amd::MemObjMap::FindMemObj(ptr, &offset);
   if (memObj == nullptr) {
-    // If memObj not found, use arena_mem_obj. arena_mem_obj is null, if HMM and Xnack is disabled.
+    // If memObj not found, use arena_mem_obj. arena_mem_obj is null, if HMM is disabled.
     memObj = (hip::getCurrentDevice()->asContext()->svmDevices()[0])->GetArenaMemObj(
         ptr, offset, size);
   }

rocclr/device/rocm/rocdevice.cpp

@@ -3235,9 +3235,10 @@ device::Signal* Device::createSignal() const {
 amd::Memory* Device::GetArenaMemObj(const void* ptr, size_t& offset, size_t size) {
   // Only create arena_mem_object if CPU memory is accessible from HMM
   // or if runtime received an interop from another ROCr's client
+  // Disable arena for XNACK
   hsa_amd_pointer_info_t ptr_info = {};
   ptr_info.size = sizeof(hsa_amd_pointer_info_t);
-  if (!info_.hmmCpuMemoryAccessible_ && !IsValidAllocation(ptr, size, &ptr_info)) {
+  if (!IsValidAllocation(ptr, size, &ptr_info)) {
     return nullptr;
   }