P4 to Git Change 1120702 by skudchad@skudchad_test_win_opencl2 on 2015/02/10 15:02:35

EPR #403782 - IOMMU2/SVM
	Basic changes to enable finegrainsystem.
	- OpenCL runtime changes for enabling Fine Grain System on Carrizo
	- Check for SVMPointer while unmap, if so skip unmap

	ReviewBoardURL = http://ocltc.amd.com/reviews/r/6844/diff/

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpudevice.cpp#494 edit
... //depot/stg/opencl/drivers/opencl/runtime/device/gpu/gpuvirtual.cpp#350 edit

rocclr/runtime/device/gpu/gpuvirtual.cpp

@@ -1187,7 +1187,7 @@ VirtualGPU::submitUnmapMemory(amd::UnmapMemoryCommand& vcmd)
 
     // We used host memory
     if ((owner->getHostMem() != NULL) && memory->isDirectMap()) {
-        if (memory->isUnmapWrite()) {
+        if (memory->isUnmapWrite() && !owner->usesSvmPointer()) {
             // Target is the backing store, so sync
             owner->signalWrite(NULL);
             memory->syncCacheFromHost(*this);