Hi, I understand that GuC is 32bit uController, so it has access only to 4GB GTT. I don't understand WOPCM and GTT conjunction. >From i915 doc we can see that: +===========> +====================+ <== FFFF_FFFF ^ | Reserved | | +====================+ <== GUC_GGTT_TOP | | | | | DRAM | GuC | | Address +===> +====================+ <== GuC ggtt_pin_bias Space ^ | | | | | | | GuC | GuC | | WOPCM | WOPCM | | Size | | | | | | v v | | +=======+===> +====================+ <== 0000_0000 Can the range of (from 0x0000_0000 to "GuC ggtt_pin_bias") be used by other parts of the KMD? Or this range is reserved only for GuC WOPCM and shouldn't be used by KMD driver for other allocations? Thanks for reply, Maksym
