SWDEV-272268, SWDEV-268186 - OCL change for Rebar optimization:fix regressions in OCLMemInfo and Conformance basic test

Change-Id: I3e709942b5f43ba52a4cb0824a2e6b3202d4b405

rocclr/device/pal/palmemory.cpp

@@ -106,6 +106,12 @@ bool Memory::create(Resource::MemoryType memType, Resource::CreateParams* params
   }
 
   do {
+    // Assume that allocations will be placed into visible heap when ReBar is enabled
+    // Only enable this assumption for small size local buffers
+    constexpr size_t kLargeAlloc = (1ull << 27);
+    if ((memType == Local) && desc().buffer_ && (size() < kLargeAlloc) && dev().info().largeBar_) {
+      memType = Persistent;
+    }
     // Create a resource in PAL
     result = Resource::create(memType, params, forceLinear);
     if (!result) {

rocclr/device/pal/palvirtual.cpp

@@ -1721,6 +1721,8 @@ void VirtualGPU::submitUnmapMemory(amd::UnmapMemoryCommand& vcmd) {
     // data check was added for persistent memory that failed to get aperture
     // and therefore are treated like a remote resource
     else if (memory->isPersistentDirectMap() && (memory->data() != nullptr)) {
+      // Map/unmap must be serialized
+      amd::ScopedLock lock(owner->lockMemoryOps());
       memory->unmap(this);
     } else if (memory->mapMemory() != nullptr) {
       if (writeMapInfo->isUnmapWrite()) {