From: "Jaehyuk Lee" <jhl9105@kaist.ac.kr>
To: intel-gfx@lists.freedesktop.org
Subject: Question about relationship between intel-gfx-SVM and PASID
Date: Mon, 8 May 2017 17:09:39 +0900 (KST) [thread overview]
Message-ID: <59102ae23fda_@_imoxion.com> (raw)
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Hi, I am a newbie on the intel-gfx and tries to use the shared virtual memory which is mentioned in several intel documents (vt-d and Intel-gfx-prm)supported in the opencl library to share address space betweenCPU and intel integrated GPU.As far as I know, shared virtual memory is supported as a part of intel VT-D extensionwith the help of IOMMU and PASID. Although It seems that intel-gfx repo has the source code related with PASID,the opencl library for intel-gfx (beignet) doesn't use the any functionsrelated with PAISD nor IOMMU.It seems that clSVMAlloc is a opencl function for zero copyfollowing the Intel document,but it doesn't use any functions related with PASID and IOMMU.Is the current intel-gfx supports the virtual address space sharing thorugh the IOMMU and PASID? *I am so sorry If I sent this mail to wrong mailing listBest regardsJaehyuk.
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