SWDEV-301667 - Add a flag for gpuvm kernargs

HIP_FORCE_DEV_KERNARG=1 will create a device allocation for kernel arg
segment. Flag is 0 by default.

Change-Id: Iaaf5a149f3be8596568878d5d272268baf067c60

rocclr/device/rocm/rocdevice.cpp

@@ -175,6 +175,7 @@ Device::Device(hsa_agent_t bkendDevice)
   gpuvm_segment_.handle = 0;
   gpu_fine_grained_segment_.handle = 0;
   prefetch_signal_.handle = 0;
+  isXgmi_ = false;
   cache_state_ = Device::CacheState::kCacheStateInvalid;
 }
 
@@ -192,14 +193,20 @@ void Device::setupCpuAgent() {
       }
     }
   }
+  std::vector<amd::Device::LinkAttrType> link_attrs;
+  link_attrs.push_back(std::make_pair(LinkAttribute::kLinkLinkType, 0));
+  if (findLinkInfo(cpu_agents_[0].fine_grain_pool, &link_attrs)) {
+    isXgmi_ = (link_attrs[0].second == HSA_AMD_LINK_INFO_TYPE_XGMI);
+  }
+
   preferred_numa_node_ = index;
   cpu_agent_ = cpu_agents_[index].agent;
   system_segment_ = cpu_agents_[index].fine_grain_pool;
   system_coarse_segment_ = cpu_agents_[index].coarse_grain_pool;
   system_kernarg_segment_ = cpu_agents_[index].kern_arg_pool;
   ClPrint(amd::LOG_INFO, amd::LOG_INIT, "Numa selects cpu agent[%zu]=0x%zx(fine=0x%zx,"
-          "coarse=0x%zx) for gpu agent=0x%zx", index, cpu_agent_.handle,
-          system_segment_.handle, system_coarse_segment_.handle, bkendDevice_.handle);
+          "coarse=0x%zx) for gpu agent=0x%zx CPU<->GPU XGMI=%d", index, cpu_agent_.handle,
+          system_segment_.handle, system_coarse_segment_.handle, bkendDevice_.handle, isXgmi_);
 }
 
 void Device::checkAtomicSupport() {